Yearly & Monthly weather

The climate of Castleton
The best time to visit Castleton
The worst time to visit Castleton
Spring weather in Castleton
Summer weather in Castleton
Autumn weather in Castleton
Winter weather in Castleton
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

The climate of Castleton

Castleton, located in Vermont, USA, primarily experiences a Humid Continental climate, characterized by no dry season and warm summer. As per the Köppen climate classification, it lies in the 'Dfb' zone. The annual weather cycle witnesses a certain degree of variation in temperature, humidity, rainfall, sunshine hours, and other meteorological parameters.

Throughout the year, the average high temperatures range significantly from a frigid 25.2°F (-3.8°C) in January to a warm 79.3°F (26.3°C) in July, displaying a clear demarcation between the freezing winters and pleasant summers. On the contrary, the average low temperatures, albeit displaying a similar pattern, span from 13.5°F (-10.3°C) in January to 56.8°F (13.8°C) in July.

Humidity levels remain fairly constant across the year with minor fluctuations, maintaining a high relative humidity around 75% to 86%. This high humidity often gives the air a thick, muggy feel, particularly during warmer weather.

Additionally, rain showers are common with an average rainfall varying from 0.67" (17mm) in March and September to 1.22" (31mm) in June, leading to a spread-out wet season with no distinct peak. Besides, noticeable differences can be observed in the snowfall with inches of snow accumulating in winter months, reaching the maximum average of 3.11" (79mm) in February.

The best time to visit Castleton

Considerable factors, such as temperature, rainfall, sunshine, and cloud cover, collectively make up the ideal conditions for visiting Castleton. From May to September, the pleasant climate is perfectly suited for outdoor adventures. The average temperatures during these months typically stay between 51.4°F (10.8°C) and 79.3°F (26.3°C), while rainfall is spread quite evenly ranging from 0.98" (25mm) to 1.22" (31mm). Additionally, the length of daylight increases, reaching up to 15.4 hours in June, with average sunshine hours going up to 10.2 hours in July, providing plenty of time to explore the beautiful outdoor attractions the location offers.

The worst time to visit Castleton

The challenging weather conditions of Castleton in winter make this period less inviting for visitors. From December to February, temperatures often drop to the tens, with the lowest average temperature falling to 13.5°F (-10.3°C). Alongside the cold, heavy snowfall is a common occurrence with February witnessing maximum accumulation of 3.11" (79mm). Thus, winter in Castleton can prove challenging for outdoor activities. However, for winter sports enthusiasts, this could be an exciting time to indulge in sports like skiing or sledding.

Spring weather in Castleton

A fresh wave of warmth arrives in Castleton with spring, from March to May. Both the high and low temperatures progressively rise from 37.4°F (3°C) and 22.6°F (-5.2°C) in March to 66.2°F (19°C) and 45°F (7.2°C) in May. Although the likelihood of rain persists throughout spring, the average rainfall inches from 0.67 in March to 1.02 in May. As days lengthen, so does the sunshine duration, with a notable climb from 5.1 hours in March to 8.4 hours in May.

Summer weather in Castleton

Enjoyable warmth encapsulates Castleton’s summer, which lasts from June to August. High temperatures mostly lie in the 70s°F, peaking at 79.3°F (26.3°C) in July, with the lowest temperatures ranging from 51.4°F (10.8°C) to 56.8°F (13.8°C). Rainfall too peaks in June, with an average of 1.22" (31mm) but reduces slightly to 0.98" (25mm) in August. More sunlight is also received during summer, up to 10.2 hours in July, offering more daylight for travelers.

Autumn weather in Castleton

Autumn marks a transition from warm to cooler temperatures in Castleton. From September to November, the average high temperatures decrease from 69.8°F (21°C) to 42.6°F (5.9°C), while the lows fall from 49.3°F (9.6°C) to 29.7°F (-1.3°C). Rainfall stabilizes around 0.98" (25mm) in both September and October but slightly decreases to 0.71" (18mm) in November. Days gradually shorten with reduced sunlight, from 8.6 hours in September to 4.9 hours in November.

Winter weather in Castleton

Winters in Castleton are marked by chilling weather conditions, with temperatures often dropping below freezing. From December to February, high temperatures average from 31.3°F (-0.4°C) to 25.2°F (-3.8°C), while low temperatures, chilling at best, fall between 21.4°F (-5.9°C) and 13.5°F (-10.3°C). Snowfall is a major highlight of Castleton’s winter, with February witnessing the maximum average snowfall of 3.11" (79mm). Despite the decrease in daylight hours, with a low of 9 hours in December, winter captures the town in a scenic charm, offering distinctive attractions for visitors.

Weather in January

The weather in Castleton, Vermont begins the year with a notable chilliness, indicative of typical winter conditions. Visibility averages 5mi (8km) throughout the month, with the presence of 62% cloud cover. Snowfall of 2.99in typically decorates the cityscape, visibly impacting the weather conditions. Weather in January »

Weather in February

As Castleton eases into February, temperatures tend to rise slightly compared to those of January. This month holds the record for the most snowfall days, with citizens experiencing snowy conditions on about 11.5 days of the month. Weather in February »

Weather in March

March signals a changing trend in the weather patterns of Castleton, Vermont. As spring approaches, there is a decrease in the amount of snowfall and the number of days it snows. A significant change is observed in the amount of snowfall, which reduces to 1.46in. Weather in March »

Weather in April

In April, citizens of Castleton begin to experience warmer and longer days as the city transitions from winter to spring. The snowfall reduces considerably from March to just 0.35in in this month. The temperatures now touch a high of 51.4°F (10.8°C) and a low of 33.8°F (1°C). Weather in April »

Weather in May

May, considered as the advent of summer, brings along warmer temperatures, clarity in the sky, and minimal chances of snowfall. The city basks in the sunlight with an average of 8.4 hours of sunshine per day. The amount of snowfall falls to a meager 0.28in, indicating an end to the snowfall season. Weather in May »

Weather in June

June in Castleton, Vermont, is characterized by warm weather, with temperatures averaging around 72.5°F (22.5°C) during the day. Rainfall picks up in this month, accumulating to 1.22in, giving the surroundings a fresh, washed look. Weather in June »

Weather in July

The weather in July hits its peak summer conditions with temperatures soaring to a high of 79.3°F (26.3°C). Interestingly, July witnesses the maximum daylight hours at approximately 15 per day. The considerably high UV Index of 5 calls for a need to take protective measures against the sun. Weather in July »

Weather in August

By August, the summer is in full swing, but the temperatures start to slightly drop back down, averaging at 77.4°F (25.2°C). Relative humidity rises to 78%, creating a bit of mugginess in the weather, but it's still bearable. Despite a dip in the daylight hours, there is still enough sunlight to enjoy a nice day out. Weather in August »

Weather in September

September brings a noticeable change in the weather pattern in Castleton, Vermont. The weather conditions show autumn slowly settling in, dropping the average high temperature to 69.8°F (21°C). The rainfall reduces to 0.67in, and the sunlight hours decrease, indicating the onset of shorter days. Weather in September »

Weather in October

October marks the arrival of Fall in its full glory in Castleton, with temperatures dipping further to an average high of 55.8°F (13.2°C). Despite the temperature drop, the UV Index remains consistent at 2. Collecting an average rainfall of 0.98in, October days enhance autumnal charm with slight drizzles. Weather in October »

Weather in November

The month of November brings with it a chill in the air, setting the stage for the approaching winter. The overall pattern signifies cooler weather, with an average high temperature of 42.6°F (5.9°C) and a low of 29.7°F (-1.3°C). Weather in November »

Weather in December

December brings in the full swing of winter to Castleton, Vermont. The weather conditions become harsh with the average high temperature dropping to 31.3°F (-0.4°C) and the wind speeds soaring to 6.5mph (10.5km/h). This month observes the least hours of sunlight per day, reducing to 9 hours. Weather in December »

Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest in Castleton?

The lowest temperatures in Castleton, Vermont, are recorded in January, with averages reaching a high of 25.2°F (-3.8°C) and a low of 13.5°F (-10.3°C).

What is the most humid month in Castleton?

January and February, with an average relative humidity of 86%, are most humid months in Castleton, Vermont.

How many days does it rain in Castleton?

Throughout the year, in Castleton, there are 112.5 rainfall days, and 10.75" (273mm) of precipitation is accumulated.

When does it snow in Castleton?

January through May, October through December are months with snowfall in Castleton, Vermont.

How many days does it snow in Castleton?

Throughout the year, there are 44.2 snowfall days, and 11.42" (290mm) of snow is accumulated.

What are the months with the lowest UV index in Castleton?

The months with the lowest UV index are January and December, with an average maximum UV index of 1.

When does it snow the most in Castleton?

February is the month with the most snowfall in Castleton, Vermont. Snow falls for 11.5 days and accumulates 3.11" (79mm) of snow.

What is the month with the least sunshine in Castleton?

With an average of 3.3h of sunshine, February has the least sunshine of the year.

What is the driest month in Castleton?

The months with the least rainfall are March and September Rain falls for 9.8 days and accumulates 0.67" (17mm) of rain.

When is Daylight Saving Time (DST) in Castleton?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Castleton, Vermont, 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 are the least humid months in Castleton?

April and May, with an average relative humidity of 75%, are the least humid months in Castleton.

What is the month with the highest UV index in Castleton?

May through August, with an average maximum UV index of 5, are months with the highest UV index.

What is the wettest month in Castleton?

June is the month with the most rainfall in Castleton, Vermont. Rain falls for 12.2 days and accumulates 1.22" (31mm) of precipitation.

When it does not snow in Castleton?

June through September are months without snowfall in Castleton, Vermont.

When are the longest days in Castleton?

With an average of 15h and 24min of daylight, June has the longest days of the year.

What time of the year is the hottest in Castleton?

July is the warmest month of the year in Castleton, registering average temperatures as high as 79.3°F (26.3°C) and as low as 56.8°F (13.8°C).

What month has the most sunshine in Castleton?

The month with the most sunshine in Castleton is July, with an average of 10.2h of sunshine.

What is the month with the shortest days in Castleton?

December has the shortest days of the year in Castleton, Vermont, with an average of 9h and 0min of daylight.

Average temperature
Castleton, VT

Average high temperature in January:
25.2°F
Average high temperature in February:
28.8°F
Average high temperature in March:
37.4°F
Average high temperature in April:
51.4°F
Average high temperature in May:
66.2°F
Average high temperature in June:
72.5°F

Average high temperature in July:
79.3°F
Average high temperature in August:
77.4°F
Average high temperature in September:
69.8°F
Average high temperature in October:
55.8°F
Average high temperature in November:
42.6°F
Average high temperature in December:
31.3°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (25.2°F).

Average low temperature in January:
13.5°F
Average low temperature in February:
14.7°F
Average low temperature in March:
22.6°F
Average low temperature in April:
33.8°F
Average low temperature in May:
45°F
Average low temperature in June:
51.4°F

Average low temperature in July:
56.8°F
Average low temperature in August:
55.4°F
Average low temperature in September:
49.3°F
Average low temperature in October:
40.8°F
Average low temperature in November:
29.7°F
Average low temperature in December:
21.4°F

The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).

Average pressure
Castleton, VT

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed
Castleton, VT

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity
Castleton, VT

The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and May (75%).

Average rainfall
Castleton, VT

The wettest month (with the highest rainfall) is June (1.22").
The driest months (with the least rainfall) are March and September (0.67").

Average rainfall days
Castleton, VT

Average rainfall days in January:
4.5 days
Average rainfall days in February:
4.7 days
Average rainfall days in March:
9.8 days
Average rainfall days in April:
12.5 days
Average rainfall days in May:
12.8 days
Average rainfall days in June:
12.2 days

Average rainfall days in July:
12.4 days
Average rainfall days in August:
11.8 days
Average rainfall days in September:
8 days
Average rainfall days in October:
10.5 days
Average rainfall days in November:
6.5 days
Average rainfall days in December:
6.8 days

The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is January (4.5 days).

Average snowfall
Castleton, VT

The month with the highest snowfall is February (3.11").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Castleton, VT

Average snowfall days in January:
10.5 days
Average snowfall days in February:
11.5 days
Average snowfall days in March:
7.4 days
Average snowfall days in April:
1.9 days
Average snowfall days in May:
0.4 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:
0.6 days
Average snowfall days in November:
3.8 days
Average snowfall days in December:
8.1 days

The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Castleton, VT

Average daylight in January:
9h and 2min
Average daylight in February:
10h and 3min
Average daylight in March:
12h and 0min
Average daylight in April:
13h and 3min
Average daylight in May:
14h and 4min
Average daylight in June:
15h and 2min

Average daylight in July:
15h and 1min
Average daylight in August:
13h and 5min
Average daylight in September:
12h and 3min
Average daylight in October:
11h and 0min
Average daylight in November:
9h and 4min
Average daylight in December:
9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

Average sunshine in January:
3h and 4min
Average sunshine in February:
3h and 2min
Average sunshine in March:
5h and 1min
Average sunshine in April:
7h and 3min
Average sunshine in May:
8h and 2min
Average sunshine in June:
9h and 0min

Average sunshine in July:
10h and 1min
Average sunshine in August:
10h and 1min
Average sunshine in September:
8h and 4min
Average sunshine in October:
5h and 1min
Average sunshine in November:
4h and 5min
Average sunshine in December:
3h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).

Average sunshine days
Castleton, VT

Average sunshine days in January:
19.8 days
Average sunshine days in February:
15.6 days
Average sunshine days in March:
16.4 days
Average sunshine days in April:
15.8 days
Average sunshine days in May:
16.1 days
Average sunshine days in June:
15.7 days

Average sunshine days in July:
16.8 days
Average sunshine days in August:
17.3 days
Average sunshine days in September:
19.4 days
Average sunshine days in October:
18.5 days
Average sunshine days in November:
20.5 days
Average sunshine days in December:
18.4 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is February (15.6 days).

Average UV index
Castleton, VT

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover
Castleton, VT

The month with the most cloud cover is February (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 36).

Average visibility
Castleton, VT

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

Climate and monthly weather forecastCastleton, VT

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