Derby
Connecticut, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Derby, CT

January, the same as December, is a wintry winter month in Derby, Connecticut, with average temperature fluctuating between 34.7°F (1.5°C) and 24.6°F (-4.1°C). January is the coldest month, with an average high-temperature of 34.7°F (1.5°C) and an average low-temperature of 24.6°F (-4.1°C). Weather in January »

February, the last month of the winter, in Derby, is another cold month, with average temperature ranging between max 37°F (2.8°C) and min 25.2°F (-3.8°C). In February, the average high-temperature is essentially the same as in January - a still cold 37°F (2.8°C). Weather in February »

The first month of the spring, March, is a chilly month in Derby, Connecticut, with average temperature ranging between min 32°F (0°C) and max 44.2°F (6.8°C). In Derby, Connecticut, the average high-temperature slightly increases, from a wintry 37°F (2.8°C) in February, to a chilly 44.2°F (6.8°C). Weather in March »

April is a moderate spring month in Derby, Connecticut, with average temperature ranging between min 41.5°F (5.3°C) and max 55.4°F (13°C). In April, the average high-temperature rises, from a chilly 44.2°F (6.8°C) in March, to a mild 55.4°F (13°C). Weather in April »

The last month of the spring, May, is a comfortable month in Derby, Connecticut, with average temperature ranging between min 51.4°F (10.8°C) and max 66.7°F (19.3°C). In Derby, Connecticut, the average high-temperature increases, from a moderate 55.4°F (13°C) in April, to a comfortable 66.7°F (19.3°C). Weather in May »

June, the first month of the summer, in Derby, is a moderately hot month, with temperature in the range of an average low of 59.5°F (15.3°C) and an average high of 74.8°F (23.8°C). In Derby, Connecticut, the average high-temperature in June slightly increases, from an enjoyable 66.7°F (19.3°C) in May, to a warm 74.8°F (23.8°C). Weather in June »

July, like June, in Derby, Connecticut, is another warm summer month, with average temperature fluctuating between 81.9°F (27.7°C) and 66.7°F (19.3°C). With an average high-temperature of 81.9°F (27.7°C) and an average low-temperature of 66.7°F (19.3°C), July is the warmest month. The average heat index is appraised at a tropical 87.3°F (30.7°C). Weather in July »

August, the last month of the summer, in Derby, is also a moderately hot month, with average temperature ranging between max 80.2°F (26.8°C) and min 65.5°F (18.6°C). In Derby, the average high-temperature in August is relatively the same as in July - a still warm 80.2°F (26.8°C). Weather in August »

The first month of the autumn, September, is also an agreeable month in Derby, Connecticut, with average temperature ranging between max 73°F (22.8°C) and min 59.4°F (15.2°C). In September, the average high-temperature marginally drops, from a warm 80.2°F (26.8°C) in August, to an agreeable 73°F (22.8°C). Weather in September »

October, the same as September, is another comfortable autumn month in Derby, Connecticut, with average temperature ranging between max 61.7°F (16.5°C) and min 50°F (10°C). In Derby, the average high-temperature decreases, from a pleasant 73°F (22.8°C) in September, to an enjoyable 61.7°F (16.5°C). Weather in October »

The last month of the autumn, November, is another chilly month in Derby, Connecticut, with temperature in the range of an average high of 49.8°F (9.9°C) and an average low of 39.2°F (4°C). In November, the average high-temperature drops, from an enjoyable 61.7°F (16.5°C) in October, to a chilly 49.8°F (9.9°C). Weather in November »

December, the first month of the winter, in Derby, is still a cold month, with average temperature fluctuating between 40.3°F (4.6°C) and 31.3°F (-0.4°C). In December, the average high-temperature decreases, from a chilly 49.8°F (9.9°C) in November, to a cold 40.3°F (4.6°C). Weather in December »

What is the coldest month in Derby?

January is the coldest month in Derby, Connecticut, with an average high-temperature of 34.7°F (1.5°C) and an average low-temperature of 24.6°F (-4.1°C).

How much does it rain in Derby?

In Derby, Connecticut, during the entire year, the rain falls for 169.1 days and collects up to 36.26" (921mm) of precipitation.

When does it snow in Derby?

January through April, November and December are months with snowfall in Derby.

How much does it snow in Derby?

Throughout the year, in Derby, there are 27.3 snowfall days, and 11.42" (290mm) of snow is accumulated.

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

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

What is the most humid month in Derby?

February is the most humid month, with an average relative humidity of 77%.

When does it snow the most in Derby?

February is the month with the most snowfall. Snow falls for 7.8 days and accumulates 3.23" (82mm) of snow.

What is the month with the least sunshine in Derby?

With an average of 4.7h of sunshine, February has the least sunshine of the year.

What is the least humid month in Derby?

With an average relative humidity of 72%, April is the least humid month in Derby.

When it does not snow in Derby?

May through October are months without snowfall in Derby.

When are the longest days in Derby?

June has the longest days of the year, with an average of 15.1h of daylight.

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

Months with the highest UV index in Derby, Connecticut, are June through August, with an average maximum UV index of 6.

What is the warmest month in Derby?

With an average high-temperature of 81.9°F (27.7°C) and an average low-temperature of 66.7°F (19.3°C), July is the warmest month.

What are the months with the most sunshine in Derby?

Months with the most sunshine are July and August, with an average of 10.5h of sunshine.

What is the driest month in Derby?

September is the month with the least rainfall. Rain falls for 13.1 days and accumulates 2.24" (57mm) of precipitation.

What is the rainiest month in Derby?

December is the month with the most rainfall in Derby. Rain falls for 12.8 days and accumulates 4.06" (103mm) of precipitation.

What is the month with the shortest days in Derby?

With an average of 9.2h of daylight, December has the shortest days of the year in Derby.
Average rainfall - Derby, CT

The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the least rainfall) is September (2.24").

Average rainfall days - Derby, CT

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).

Average snowfall - Derby, CT
Average snowfall days - Derby, CT

The month with the highest number of snowfall days is February (7.8 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight / Average sunshine - Derby, CT

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

Months with the most sunshine are July and August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

Average UV index - Derby, CT