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Contents
- 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
Weather in January
January, like December, in Collinsville, Connecticut, is another cold winter month, with an average temperature varying between 32°F (0°C) and 20.1°F (-6.6°C). In Collinsville, the lowest average temperatures are observed in January, with a high of 32°F (0°C) and a low of 20.1°F (-6.6°C). Weather in January »
Weather in February
February, the last month of the winter in Collinsville, is another cold month, with an average temperature ranging between max 35.2°F (1.8°C) and min 20.7°F (-6.3°C). Collinsville's shift into February is marked by a subtle change to a still icy 35.2°F (1.8°C) from January's 32°F (0°C) in temperature. Weather in February »
Weather in March
March, the first month of the spring in Collinsville, is a frosty month, with an average temperature varying between 42.8°F (6°C) and 28.8°F (-1.8°C). The start of March signals a slight increase in the average high-temperature, moving from a cold 35.2°F (1.8°C) in February to a frosty 42.8°F (6°C). Weather in March »
Weather in April
April in Collinsville, Connecticut, is a moderate spring month, with an average temperature varying between 38.8°F (3.8°C) and 56.1°F (13.4°C). The commencement of April sees a shift in the average high-temperature, moving from a frosty 42.8°F (6°C) in March to a refreshing 56.1°F (13.4°C). Weather in April »
Weather in May
May, the last month of the spring in Collinsville, is an enjoyable month, with an average temperature ranging between min 48.7°F (9.3°C) and max 67.6°F (19.8°C). Collinsville's May weather brings a rise in high-temperatures, moving from a mild 56.1°F (13.4°C) in April to a comfortable 67.6°F (19.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Collinsville, Connecticut, with an average temperature fluctuating between 56.5°F (13.6°C) and 75.6°F (24.2°C). With the onset of June, Collinsville's average high-temperature sees a modest rise, moving from May's enjoyable 67.6°F (19.8°C) to a warm 75.6°F (24.2°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Collinsville, Connecticut, with an average temperature ranging between min 63.1°F (17.3°C) and max 82.2°F (27.9°C). Collinsville's warmest temperatures are experienced in July, with average high temperatures of 82.2°F (27.9°C) and lows of 63.1°F (17.3°C). The heat index value for July is calculated to be a hot 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Collinsville, is also a moderately hot month, with an average temperature varying between 61.5°F (16.4°C) and 80.2°F (26.8°C). Collinsville records an average high-temperature of a still warm 80.2°F (26.8°C) as August arrives, nearly mirroring the previous month's climate. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Collinsville, Connecticut, with an average temperature ranging between max 72.9°F (22.7°C) and min 54.7°F (12.6°C). September's arrival subtly correlates with a reduction in the average high-temperature, down from a moderately hot 80.2°F (26.8°C) in August to an agreeable 72.9°F (22.7°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Collinsville, Connecticut, with an average temperature ranging between min 45.5°F (7.5°C) and max 60.1°F (15.6°C). The average high-temperature decreases in October, shifting from an agreeable 72.9°F (22.7°C) in September to a mild 60.1°F (15.6°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Collinsville, Connecticut, with an average temperature ranging between max 48.2°F (9°C) and min 34.9°F (1.6°C). In Collinsville, the average high-temperature in November drops from a mild 60.1°F (15.6°C) in October to a frosty 48.2°F (9°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Collinsville, Connecticut, with an average temperature fluctuating between 26.8°F (-2.9°C) and 37.6°F (3.1°C). With the beginning of December, the average high-temperature shows a decrease, transitioning from a chilly 48.2°F (9°C) in November to a cold 37.6°F (3.1°C). Weather in December »
Updated: Feb 10, 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 Collinsville?
January, with an average high of 32°F (0°C) and a low of 20.1°F (-6.6°C), signifies the coldest month of the year in Collinsville.
How many days does it rain in Collinsville?
Throughout the year, there are 159.6 rainfall days, and 31.97" (812mm) of precipitation is accumulated.
When does it snow in Collinsville?
Months with snowfall in Collinsville are January through May, October through December.
How many days does it snow in Collinsville?
In Collinsville, during the entire year, snow falls for 33.1 days and aggregates up to 18.39" (467mm) of snow.
When is the lowest UV index in Collinsville?
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 in Collinsville?
With an average relative humidity of 80%, February is the most humid month in Collinsville.
When does it snow the most in Collinsville?
February is the month with the most snowfall. Snow falls for 8.9 days and accumulates 5.24" (133mm) of snow.
What is the month with the least sunshine in Collinsville?
With an average of 4.6h of sunshine, February has the least sunshine of the year in Collinsville.
When is Daylight Saving Time (DST) in Collinsville?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 in Collinsville?
April is the least humid month in Collinsville, with an average relative humidity of 71%.
When it does not snow in Collinsville?
In Collinsville, Connecticut, snow does not fall in June through September.
When are the longest days in Collinsville?
The month with the longest days in Collinsville is June, with an average of 15h and 12min of daylight.
When is the highest UV index in Collinsville?
The months with the highest UV index in Collinsville are June and July, with an average maximum UV index of 6.
What month is the hottest in Collinsville?
Temperature readings in Collinsville, Connecticut, reach their annual highs in July, averaging 82.2°F (27.9°C) and a minimum average of 63.1°F (17.3°C).
What are the months with the most sunshine in Collinsville?
July and August, with an average of 10.3h of sunshine, are months with the most sunshine in Collinsville.
What is the driest month in Collinsville?
The month with the least rainfall in Collinsville, Connecticut, is September, when the rain falls for 12.6 days and typically collects 1.97" (50mm) of precipitation.
What is the wettest month in Collinsville?
December is the month with the most rainfall in Collinsville. Rain falls for 10.5 days and accumulates 3.43" (87mm) of precipitation.
What is the month with the shortest days in Collinsville?
The month with the shortest days in Collinsville is December, with an average of 9h and 12min of daylight.
Average temperature
Collinsville, CT
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure
Collinsville, 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:
30.06"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
Collinsville, CT
- Average wind speed in January:
8.3mph - Average wind speed in February:
8.1mph - Average wind speed in March:
8.3mph - 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:
5.2mph - 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:
7.4mph - Average wind speed in December:
7.8mph
The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity
Collinsville, CT
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall
Collinsville, CT
- Average rainfall in January:
2.32" - Average rainfall in February:
2.36" - Average rainfall in March:
2.56" - Average rainfall in April:
2.76" - Average rainfall in May:
2.6" - Average rainfall in June:
2.72"
- Average rainfall in July:
2.76" - Average rainfall in August:
2.52" - Average rainfall in September:
1.97" - Average rainfall in October:
3.19" - Average rainfall in November:
2.8" - Average rainfall in December:
3.43"
The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days
Collinsville, CT
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
9.5 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
14.9 days - Average rainfall days in May:
16.9 days - Average rainfall days in June:
16.7 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
14.9 days - Average rainfall days in September:
12.6 days - Average rainfall days in October:
14.1 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
10.5 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (9.4 days).
Average snowfall
Collinsville, CT
- Average snowfall in January:
3.74" - Average snowfall in February:
5.24" - Average snowfall in March:
4.17" - Average snowfall in April:
0.79" - Average snowfall in May:
0.24" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Collinsville, CT
- Average snowfall days in January:
8.2 days - Average snowfall days in February:
8.9 days - Average snowfall days in March:
6.8 days - Average snowfall days in April:
0.8 days - Average snowfall days in May:
0.2 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:
0.2 days - Average snowfall days in November:
1.9 days - Average snowfall days in December:
6.1 days
The month with the highest number of snowfall days is February (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Collinsville, 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:
4h and 5min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 2min - 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 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days
Collinsville, CT
- Average sunshine days in January:
17.1 days - Average sunshine days in February:
13.1 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
14.2 days - Average sunshine days in September:
15.7 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
17 days - Average sunshine days in December:
15.7 days
The month with the most sunshine days is January (17.1 days).
The month with the least sunshine days is June (11.6 days).
Average UV index
Collinsville, 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
Collinsville, CT
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility
Collinsville, CT
The months with the highest visibility are April, October, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August and September (5mi).
Collinsville, Connecticut, USA
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