Monthly weather forecast and climate
Waterbury, CT

Weather in January

January, like December, in Waterbury, Connecticut, is another cold winter month, with average temperature fluctuating between 21.4°F (-5.9°C) and 33.3°F (0.7°C). The coldest month is January, with an average high-temperature of 33.3°F (0.7°C) and an average low-temperature of 21.4°F (-5.9°C). Weather in January »

Weather in February

February, the last month of the winter, in Waterbury, is also a wintry month, with temperature in the range of an average high of 36°F (2.2°C) and an average low of 21.9°F (-5.6°C). In February, the average high-temperature is practically the same as in January - a still wintry 36°F (2.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Waterbury, Connecticut, with average temperature varying between 44.1°F (6.7°C) and 29.1°F (-1.6°C). In March, the average high-temperature marginally rises, from a cold 36°F (2.2°C) in February, to a frosty 44.1°F (6.7°C). Weather in March »

Weather in April

April in Waterbury, Connecticut, is a mild spring month, with average temperature fluctuating between 56.7°F (13.7°C) and 39.7°F (4.3°C). In April, the average high-temperature increases, from a chilly 44.1°F (6.7°C) in March, to a moderate 56.7°F (13.7°C). Weather in April »

Weather in May

May, the last month of the spring, in Waterbury, is a pleasant month, with average temperature fluctuating between 68.2°F (20.1°C) and 48.9°F (9.4°C). In May, the average high-temperature increases, from a mild 56.7°F (13.7°C) in April, to a pleasant 68.2°F (20.1°C). Weather in May »

Weather in June

June, the first month of the summer, in Waterbury, is a moderately hot month, with average temperature varying between 76.1°F (24.5°C) and 56.7°F (13.7°C). In June, the average high-temperature marginally rises, from an agreeable 68.2°F (20.1°C) in May, to a moderately hot 76.1°F (24.5°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Waterbury, Connecticut, with average temperature ranging between max 82.4°F (28°C) and min 63.1°F (17.3°C). With an average high-temperature of 82.4°F (28°C) and an average low-temperature of 63.1°F (17.3°C), July is the warmest month. The average heat index is evaluated at a tropical 88.7°F (31.5°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Waterbury, Connecticut, with average temperature ranging between min 61.7°F (16.5°C) and max 80.6°F (27°C). In Waterbury, the average high-temperature in August is essentially the same as in July - a still warm 80.6°F (27°C). Weather in August »

Weather in September

September, the first month of the autumn, in Waterbury, is also an agreeable month, with average temperature ranging between max 73.2°F (22.9°C) and min 55.6°F (13.1°C). In September, the average high-temperature marginally drops, from a moderately hot 80.6°F (27°C) in August, to an agreeable 73.2°F (22.9°C). Weather in September »

Weather in October

October, like September, in Waterbury, Connecticut, is another comfortable autumn month, with average temperature fluctuating between 61°F (16.1°C) and 46.6°F (8.1°C). In Waterbury, the average high-temperature 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

The last month of the autumn, November, is another chilly month in Waterbury, Connecticut, with average temperature ranging between min 35.6°F (2°C) and max 48.6°F (9.2°C). In Waterbury, the average high-temperature decreases, from an enjoyable 61°F (16.1°C) in October, to a chilly 48.6°F (9.2°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Waterbury, Connecticut, with average temperature fluctuating between 28°F (-2.2°C) and 38.7°F (3.7°C). In December, the average high-temperature decreases, from a chilly 48.6°F (9.2°C) in November, to a cold 38.7°F (3.7°C). Weather in December »
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FAQ

What is the coldest month in Waterbury?

The coldest month in Waterbury is January, with an average high-temperature of 33.3°F (0.7°C) and an average low-temperature of 21.4°F (-5.9°C).

How much does it rain in Waterbury?

In Waterbury, Connecticut, during the entire year, the rain falls for 158.5 days and collects up to 34.57" (878mm) of precipitation.

When does it snow in Waterbury?

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

How much does it snow in Waterbury?

In Waterbury, Connecticut, during the entire year, snow falls for 34.9 days, and aggregates up to 20.35" (517mm) of snow.

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

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 Waterbury?

With an average relative humidity of 80%, February is the most humid month.

What is the snowiest month in Waterbury?

February is the month with the most snowfall in Waterbury, Connecticut. Snow falls for 9.2 days and accumulates 5.39" (137mm) of snow.

What is the month with the least sunshine in Waterbury?

With an average of 4.5h of sunshine, February has the least sunshine of the year in Waterbury, Connecticut.

What is the least humid month in Waterbury?

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

When it does not snow in Waterbury?

June through September are months without snowfall in Waterbury.

When are the longest days in Waterbury?

June has the longest days of the year, with an average of 15.2h of daylight.

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

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

What is the warmest month in Waterbury?

July is the warmest month, with an average high-temperature of 82.4°F (28°C) and an average low-temperature of 63.1°F (17.3°C).

What are the months with the most sunshine in Waterbury?

July and August, with an average of 10.1h of sunshine, are months with the most sunshine.

What is the driest month in Waterbury?

The month with the least rainfall in Waterbury, Connecticut, is September when the rain falls for 13 days and typically collects 2.13" (54mm) of precipitation.

What is the rainiest month in Waterbury?

December is the month with the most rainfall in Waterbury. Rain falls for 10.5 days and accumulates 3.78" (96mm) of precipitation.

What is the month with the shortest days in Waterbury?

December has the shortest days of the year, with an average of 9.2h of daylight.

Average temperature
Waterbury, CT

Average temperature - Waterbury, CT

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.3°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 (21.4°F).

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Average pressure
Waterbury, CT

Average pressure - Waterbury, CT

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed
Waterbury, CT

Average wind speed - Waterbury, CT

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average rainfall
Waterbury, CT

Average rainfall - Waterbury, CT

The wettest month (with the highest rainfall) is December (3.78").
The driest month (with the least rainfall) is September (2.13").

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Average rainfall days
Waterbury, CT

Average rainfall days - Waterbury, CT

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall
Waterbury, CT

Average snowfall - Waterbury, CT

The month with the highest snowfall is February (5.39").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Waterbury, CT

Average snowfall days - Waterbury, CT

The month with the highest number of snowfall days is February (9.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Waterbury, CT

Average daylight / Average sunshine - Waterbury, CT

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

Months with the most sunshine are July and August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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Average sunshine days
Waterbury, CT

Average sunshine days - Waterbury, CT

The month with the most sunshine days is January (18.1 days).
The month with the least sunshine days is June (11.1 days).

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Average UV index
Waterbury, CT

Average UV index - Waterbury, CT

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

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Average visibility
Waterbury, CT

Average visibility - Waterbury, CT

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

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