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Contents
- The climate of Bolton
- The best time to visit Bolton
- The worst time to visit Bolton
- Spring weather in Bolton
- Summer weather in Bolton
- Autumn weather in Bolton
- Winter weather in Bolton
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Grass, brown sand, and trees on an empty beach in Bolton, Connecticut, overlooking the blue waters far out
The climate of Bolton
Bolton, Connecticut, USA, is classified as Dfb climate according to the Köppen climate classification. This signifies a humid continental climate with no dry season and warm summers. Bolton's geographical position contributes to the diverse weather conditions experienced throughout the year.
Year-round, Bolton experiences fairly well-distributed rainfall and relative humidity that stays between 71% and 80%. A characteristic feature of Bolton's climate is the varying temperatures that range from as low as 21.2°F (-6°C) in the chilly winter months to as high as 83.1°F (28.4°C) in the warm summer months.
Rainfall in Bolton ranges from 1.77" (45mm) in September to a peak of 3.27" (83mm) in December, coupled with the number of rainy days varying from 10 days in January to as high as 17.3 days in July. The city also receives snowfall from 0.04" (1mm) in October up to 4.8" (122mm) in February, with snowfall days extending from zero days in many months to as many as 8.5 days in February.
Interestingly, Bolton also experiences diverse daylight hours from 9.2 hours in December up to 15.2 hours in June. Sunshine in Bolton is quite well-distributed, ranging from 4.6 hours in February up to 10.4 hours in July and August, with number of sunny days varying from as low as 11.2 days in June to 17.2 days in November.
Wind speed in Bolton tends to decrease as the year progresses, with the highest average wind speed of 8.1mph (13km/h) in January and February and the lowest of 5.2mph (8.4km/h) in August. Besides, the visibility ranges from 5 miles in several months to 6 miles in numerous months exposing the frequent changes in atmospheric conditions.
Year-round, Bolton experiences fairly well-distributed rainfall and relative humidity that stays between 71% and 80%. A characteristic feature of Bolton's climate is the varying temperatures that range from as low as 21.2°F (-6°C) in the chilly winter months to as high as 83.1°F (28.4°C) in the warm summer months.
Rainfall in Bolton ranges from 1.77" (45mm) in September to a peak of 3.27" (83mm) in December, coupled with the number of rainy days varying from 10 days in January to as high as 17.3 days in July. The city also receives snowfall from 0.04" (1mm) in October up to 4.8" (122mm) in February, with snowfall days extending from zero days in many months to as many as 8.5 days in February.
Interestingly, Bolton also experiences diverse daylight hours from 9.2 hours in December up to 15.2 hours in June. Sunshine in Bolton is quite well-distributed, ranging from 4.6 hours in February up to 10.4 hours in July and August, with number of sunny days varying from as low as 11.2 days in June to 17.2 days in November.
Wind speed in Bolton tends to decrease as the year progresses, with the highest average wind speed of 8.1mph (13km/h) in January and February and the lowest of 5.2mph (8.4km/h) in August. Besides, the visibility ranges from 5 miles in several months to 6 miles in numerous months exposing the frequent changes in atmospheric conditions.
The best time to visit Bolton
The best time to visit Bolton is from May to September. This period offers pleasant temperatures between 56.7°F (13.7°C) to 83.1°F (28.4°C). Visitors can enjoy extended daylight hours, up to 15.2 hours in June, and considerable sunshine, peaking at 10.4 hours in July and August. This period also has the highest UV index, indicating a better potential for outdoor activities under the sun.
The worst time to visit Bolton
It is advisable to avoid visiting Bolton in the winter months from December to February when the town experiences its coldest temperatures dropping to as low as 21.2°F (-6°C) in January. Snowfall also peaks in February with an average of 4.8" (122mm). The winter season has the shortest daylight hours, dropping to a low of 9.2 hours in December.
Spring weather in Bolton
During spring months, from March to May, Bolton’s temperate climate becomes apparent, with an average high that escalates from 44.2°F (6.8°C) to 68.9°F (20.5°C) and an average low that rises from 29.5°F (-1.4°C) to 49.5°F (9.7°C). Rainfall is at its peak in the spring with an average of up to 2.83" (72mm) in April and May. The number of rainy days also peaks during this time.
Summer weather in Bolton
Summer, from June to August, is the most pleasant time in Bolton with the highest average high temperature of 83.1°F (28.4°C) in July and a delightful average low of 63.5°F (17.5°C) in the same month. Rainfall is evenly distributed during this period. Daylight hours and sunshine are at their peak providing the perfect setting for outdoor activities.
Autumn weather in Bolton
From September to November, Bolton experiences autumn with temperatures that gradually reduce from an average high of 73.4°F (23°C) to 48.9°F (9.4°C) and an average low that proceeds a steady decline from 55.2°F (12.9°C) to 35.8°F (2.1°C). September has the least rainfall, but it quickly increases in the following months. Daylight hours gradually reduce during this period.
Winter weather in Bolton
Winter in Bolton, from December to February, is characterized by freezing temperatures that average from 21.2°F (-6°C) up to 36°F (2.2°C). The peak snowfall happens in February with 4.8" (122mm). Days are shortest in winter with average daylight hours as low as 9.2 in December. Despite the cold, the winter months are some of the less humid times in Bolton.
Weather in January
Notorious for its chilly winds, January in Bolton, Connecticut, USA presents itself with a classic winter tableau. The relatively high relative humidity of 76% often gives the cool air a biting edge, turning the chilly weather into freezing conditions sometimes. Weather in January »
Weather in February
Bolton endures the last grips of winter in February, the month playing out in varying shades of bitter cold. However, shifting weather patterns start to emerge, enabling an increment in the average temperatures from January. February experiences the highest snowfall for the year, encompassing the region in a blanket 4.8" (122mm) of snowfall. Weather in February »
Weather in March
As March heralds the arrival of spring in Bolton, the city experiences notable changes in its weather patterns. The snow begins to thaw, temperatures continue their upward trajectory, and the increase in daylight hours provide a comparative respite to the colder months. Weather in March »
Weather in April
April sees considerable improvements in Bolton's weather, marking a clear departure from the lingering cold. Temperatures start climbing steadily, reaching up to 56.7°F (13.7°C), making outdoor activities more appealing. The city also begins to see more sunshine, enabling blooming flora to bask in the increased daylight. Weather in April »
Weather in May
May presents itself as the herald of summer. The atmosphere during this time ushers in a complete transformation from wintery bleakness to the vibrancy of blooming flowers and lush green lawns. The temperatures continue their steady climb, reaching a refreshing high, further highlighting the definite arrival of warmer conditions. Weather in May »
Weather in June
June brings the official start of summer to Bolton, as the city greets the longest daylight hours of the year. With the increase in temperatures, the city assumes a busier, more alive demeanor. This month is blessed with approximately 15.2 hours of daylight, making it an excellent time for outdoor activities. Weather in June »
Weather in July
July stands out as the hottest month in Bolton, with the city's inhabitants enjoying consistent summery conditions. The balmy nights and warm days offer a perfect recipe for outdoor events, barbecues, or local festivities. The average high temperature peaks at 83.1°F (28.4°C), with sustained warmth throughout the day rendering a truly summer-like feel. Weather in July »
Weather in August
Largely considered the tail end of summer, August continues to bask in summer's warmth, yet exhibits noticeable changes towards the end. The temperature averages begin their descent from the peak observed in July, promising the advent of cooler fall weather soon. Weather in August »
Weather in September
September in Bolton signifies the start of the much-anticipated fall season. A notable departure from the sweltering summer, this month brings a crisp chill to the air, particularly during the late evenings and early mornings. Weather in September »
Weather in October
October is the time when the fall season truly sets its roots in Bolton. The temperatures plummet further, reinforcing the dominance of cooler weather over the waning remnants of summer. Colors of autumn are in their full grandeur, with the city's landscape presenting a delightful spectacle. Weather in October »
Weather in November
November bears chilly winds and shorter days, marking the city's gradual transition into winter. The cheerful autumn colours start to fade, making way for the grim, barren trees symbolic of the winter season nearing. The last traces of autumn's vibrancy disappear, with the average high temperature plummeting to 48.9°F (9.4°C), hinting at the frigid days to come. Weather in November »
Weather in December
December sees Bolton settling into the characteristic winter routine, with signs of the season evident all around the city. As the temperatures drop drastically, the city receives an average snowfall of about 3.15" (80mm), turning the cityscape into a winter wonderland. Weather in December »
Updated: Jul 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
In Bolton, the lowest temperatures are generally noted in January, averaging a high of 32.9°F (0.5°C) and a low of 21.2°F (-6°C).
How much does it rain?
In Bolton, Connecticut, during the entire year, the rain falls for 164.8 days and collects up to 31.77" (807mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
How much does it snow?
In Bolton, Connecticut, during the entire year, snow falls for 31.6 days and aggregates up to 17.13" (435mm) of snow.
What is the month with the lowest UV index?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What is the most humid month?
With an average relative humidity of 80%, February is the most humid month.
What is the snowiest month in Bolton?
February is the month with the most snowfall. Snow falls for 8.5 days and accumulates 4.8" (122mm) of snow.
What is the month with the least sunshine?
With an average of 4.6h of sunshine, February has the least sunshine of the year.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Bolton, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month?
The least humid month is April, with an average relative humidity of 71%.
When it does not snow?
In Bolton, snow does not fall in June through September.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
When is the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What are the warmest months?
Bolton's temperatures tend to reach their peak averages in July, with a high of 83.1°F (28.4°C) and a low of 63.5°F (17.5°C).
What is the month with the most sunshine?
July and August, with an average of 10.4h of sunshine, are months with the most sunshine.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.77" (45mm) of precipitation.
What is the wettest month?
December is the month with the most rainfall. Rain falls for 11.8 days and accumulates 3.27" (83mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Bolton, CT
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (32.9°F).
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure
Bolton, CT
- Average pressure in January:
30.03"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Bolton, CT
- Average wind speed in January:
8.1mph - Average wind speed in February:
8mph - Average wind speed in March:
8.1mph - Average wind speed in April:
7.8mph - Average wind speed in May:
6.5mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.8mph - Average wind speed in October:
6.9mph - Average wind speed in November:
7.3mph - Average wind speed in December:
7.8mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity
Bolton, CT
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall
Bolton, CT
- Average rainfall in January:
2.28" - Average rainfall in February:
2.32" - Average rainfall in March:
2.68" - Average rainfall in April:
2.83" - Average rainfall in May:
2.6" - Average rainfall in June:
2.8"
- Average rainfall in July:
2.83" - Average rainfall in August:
2.6" - Average rainfall in September:
1.77" - Average rainfall in October:
3.03" - Average rainfall in November:
2.76" - Average rainfall in December:
3.27"
The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days
Bolton, CT
- Average rainfall days in January:
10 days - Average rainfall days in February:
10.3 days - Average rainfall days in March:
12.7 days - Average rainfall days in April:
14.9 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
16.7 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
14.5 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
11.8 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (10 days).
Average snowfall
Bolton, CT
- Average snowfall in January:
3.39" - Average snowfall in February:
4.8" - Average snowfall in March:
4.17" - Average snowfall in April:
0.59" - Average snowfall in May:
0.31" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Bolton, CT
- Average snowfall days in January:
7.8 days - Average snowfall days in February:
8.5 days - Average snowfall days in March:
6.9 days - Average snowfall days in April:
0.9 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
5.8 days
The month with the highest number of snowfall days is February (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Bolton, CT
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
5h and 1min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days
Bolton, CT
- Average sunshine days in January:
17 days - Average sunshine days in February:
12.9 days - Average sunshine days in March:
12.5 days - Average sunshine days in April:
12.2 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
11.2 days
- Average sunshine days in July:
12 days - Average sunshine days in August:
12 days - Average sunshine days in September:
14.6 days - Average sunshine days in October:
14.1 days - Average sunshine days in November:
17.2 days - Average sunshine days in December:
15.1 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.2 days).
Average UV index
Bolton, CT
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Bolton, CT
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility
Bolton, CT
The months with the highest visibility are January, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are February, May and September (5mi).
Bolton, Connecticut, USA
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