Climate and monthly weather forecast
Willimantic, CT

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Weather in January

January, like December, in Willimantic, Connecticut, is an icy winter month, with an average temperature fluctuating between 33.4°F (0.8°C) and 21.6°F (-5.8°C). Willimantic experiences its lowest average temperatures in January, reaching a peak of 33.4°F (0.8°C) and a minimum of 21.6°F (-5.8°C). Weather in January »

Weather in February

The last month of the winter, February, is another cold month in Willimantic, Connecticut, with temperature in the range of an average high of 36.7°F (2.6°C) and an average low of 22.5°F (-5.3°C). Willimantic's shift into February sets the average high-temperature at a still cold 36.7°F (2.6°C), a figure that deviates only slightly from January's 33.4°F (0.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Willimantic, Connecticut, with temperature in the range of an average low of 29.7°F (-1.3°C) and an average high of 43.7°F (6.5°C). March's arrival signals a modest temperature shift, moving from a cold 36.7°F (2.6°C) in February to a chilly 43.7°F (6.5°C). Weather in March »

Weather in April

April is a refreshing spring month in Willimantic, Connecticut, with an average temperature varying between 55.9°F (13.3°C) and 39.6°F (4.2°C). April brings a rise in Willimantic's average high-temperature, moving from a chilly 43.7°F (6.5°C) in March to a mild 55.9°F (13.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in Willimantic, Connecticut, with an average temperature varying between 48.9°F (9.4°C) and 67.1°F (19.5°C). A rise in the average high-temperature is observed during May, moving from a mild 55.9°F (13.3°C) in April to a comfortable 67.1°F (19.5°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Willimantic, Connecticut, with an average temperature fluctuating between 74.8°F (23.8°C) and 56.3°F (13.5°C). As Willimantic transitions into June, a marginal rise in the average high-temperature is observed, moving from an enjoyable 67.1°F (19.5°C) in May to a warm 74.8°F (23.8°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Willimantic, Connecticut, with an average temperature fluctuating between 81.9°F (27.7°C) and 63°F (17.2°C). Willimantic experiences its highest temperatures in July, with an average peak of 81.9°F (27.7°C) and a low of 63°F (17.2°C). In July, the average heat index is computed to be a hot 87.8°F (31°C). Weather in July »

Weather in August

August, the last month of the summer in Willimantic, is also a moderately hot month, with an average temperature varying between 62.2°F (16.8°C) and 80.2°F (26.8°C). Willimantic experiences a transition to a still moderately hot 80.2°F (26.8°C) in average high-temperatures with the arrival of August, not greatly differing from July's 81.9°F (27.7°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Willimantic, Connecticut, with an average temperature ranging between max 73.2°F (22.9°C) and min 55.4°F (13°C). With the arrival of September, Willimantic experiences a modest decline in average high-temperatures, transitioning from a warm 80.2°F (26.8°C) in August to a pleasant 73.2°F (22.9°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Willimantic, Connecticut, with an average temperature fluctuating between 61°F (16.1°C) and 46.4°F (8°C). In Willimantic, the average high-temperature in October decreases from a pleasant 73.2°F (22.9°C) in September to a comfortable 61°F (16.1°C). Weather in October »

Weather in November

November, the last month of the autumn in Willimantic, is also a frosty month, with temperature in the range of an average low of 36.1°F (2.3°C) and an average high of 49.1°F (9.5°C). The decrease of average high-temperatures is mild in November, with a decline from a refreshing 61°F (16.1°C) in October to a chilly 49.1°F (9.5°C). Weather in November »

Weather in December

December, the first month of the winter in Willimantic, is also an icy month, with an average temperature varying between 39.4°F (4.1°C) and 28.6°F (-1.9°C). December weather is marked by a drop in the average high-temperature, falling from a frosty 49.1°F (9.5°C) in November to an icy 39.4°F (4.1°C). Weather in December »
Updated: Feb 10, 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 Willimantic?

January stands out as Willimantic's coldest month, with an average high-temperature of 33.4°F (0.8°C) and a low-temperature of 21.6°F (-5.8°C).

How much does it rain in Willimantic?

Throughout the year, there are 164.2 rainfall days, and 33.74" (857mm) of precipitation is accumulated.

When does it snow in Willimantic?

January through May, November and December are months with snowfall in Willimantic.

How many days does it snow in Willimantic?

Throughout the year, in Willimantic, Connecticut, there are 31.6 snowfall days, and 15.98" (406mm) of snow is accumulated.

What is the month with the lowest UV index in Willimantic?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Willimantic.

What is the most humid month in Willimantic?

The months with the highest humidity in Willimantic are February and October, with an average relative humidity of 79%.

What is the snowiest month in Willimantic?

March is the month with the most snowfall. Snow falls for 7.3 days and accumulates 4.41" (112mm) of snow.

When is Daylight Saving Time (DST) in Willimantic?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Willimantic, 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 Willimantic?

The least humid month in Willimantic, Connecticut, is April, with an average relative humidity of 72%.

When it does not snow in Willimantic?

In Willimantic, Connecticut, snow does not fall in June through October.

When are the longest days in Willimantic?

With an average of 15h and 12min of daylight, June has the longest days of the year.

What are the months with the highest UV index in Willimantic?

The months with the highest UV index in Willimantic are June through August, with an average maximum UV index of 6.

What is the hottest time of year in Willimantic?

In Willimantic, Connecticut, the average highest temperatures are observed in July, with a high of 81.9°F (27.7°C) and a low of 63°F (17.2°C).

What month has the most sunshine in Willimantic?

With an average of 10.3h of sunshine, August has the most sunshine of the year.

What is the driest month in Willimantic?

September is the month with the least rainfall in Willimantic. Rain falls for 13.5 days and accumulates 1.73" (44mm) of precipitation.

What is the rainiest month in Willimantic?

The month with the most rainfall is December, when the rain falls for 11.5 days and typically aggregates up to 3.46" (88mm) of precipitation.

What is the month with the shortest days in Willimantic?

December has the shortest days of the year in Willimantic, with an average of 9h and 12min of daylight.

What is the month with the least sunshine in Willimantic?

The month with the least sunshine is December, with an average of 4.7h of sunshine.

Average temperature
Willimantic, CT

Average temperature - Willimantic, CT

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.4°F).

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure
Willimantic, CT

Average pressure - Willimantic, CT

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
Willimantic, CT

Average wind speed - Willimantic, CT

The windiest months (with the highest average wind speed) are January and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

Average humidity
Willimantic, CT

Average humidity - Willimantic, CT

The months with the highest relative humidity are February and October (79%).
The month with the lowest relative humidity is April (72%).

Average rainfall
Willimantic, CT

Average rainfall - Willimantic, CT

The wettest month (with the highest rainfall) is December (3.46").
The driest month (with the least rainfall) is September (1.73").

Average rainfall days
Willimantic, CT

Average rainfall days - Willimantic, CT

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.1 days).

Average snowfall
Willimantic, CT

Average snowfall - Willimantic, CT

The month with the highest snowfall is March (4.41").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days
Willimantic, CT

Average snowfall days - Willimantic, CT

The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight / Average sunshine
Willimantic, CT

Average daylight / Average sunshine - Willimantic, CT

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).

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).

Average sunshine days
Willimantic, CT

Average sunshine days - Willimantic, CT

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (10.8 days).

Average UV index
Willimantic, CT

Average UV index - Willimantic, CT

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover
Willimantic, CT

Average cloud cover - Willimantic, CT

The months with the most cloud cover are February, March, May and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility
Willimantic, CT

Average visibility - Willimantic, CT

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

Willimantic, Connecticut, USA

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