Monthly weather forecast and climate
Delaware, NJ

Weather in January

January, the same as December, is another cold winter month in Delaware, New Jersey, with average temperature varying between 19.8°F (-6.8°C) and 32.5°F (0.3°C). With an average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 19.8°F (-6.8°C), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is another cold month in Delaware, New Jersey, with average temperature ranging between max 36.3°F (2.4°C) and min 21.6°F (-5.8°C). In Delaware, the average high-temperature is relatively the same as in January - a still cold 36.3°F (2.4°C). Weather in February »

Weather in March

March, the first month of the spring, in Delaware, is a frosty month, with average temperature ranging between min 28.2°F (-2.1°C) and max 44.1°F (6.7°C). In March, the average high-temperature marginally rises, from a cold 36.3°F (2.4°C) in February, to a chilly 44.1°F (6.7°C). Weather in March »

Weather in April

April in Delaware, New Jersey, is a moderate spring month, with average temperature varying between 56.1°F (13.4°C) and 38.5°F (3.6°C). In April, the average high-temperature rises, from a chilly 44.1°F (6.7°C) in March, to a mild 56.1°F (13.4°C). Weather in April »

Weather in May

May, the last month of the spring, in Delaware, is an agreeable month, with temperature in the range of an average high of 68.2°F (20.1°C) and an average low of 48.7°F (9.3°C). In Delaware, the average high-temperature increases, from a mild 56.1°F (13.4°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 Delaware, is a warm month, with average temperature fluctuating between 76.5°F (24.7°C) and 55.6°F (13.1°C). In Delaware, the average high-temperature in June slightly increases, from an agreeable 68.2°F (20.1°C) in May, to a warm 76.5°F (24.7°C). Weather in June »

Weather in July

July, like June, in Delaware, New Jersey, is another warm summer month, with average temperature ranging between max 82.2°F (27.9°C) and min 61.2°F (16.2°C). With an average high-temperature of 82.2°F (27.9°C) and an average low-temperature of 61.2°F (16.2°C), July is the warmest month. The average heat index in July is estimated at a hot 88.5°F (31.4°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Delaware, New Jersey, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 59.4°F (15.2°C). In August, the average high-temperature is practically the same as in July - a still warm 80.2°F (26.8°C). Weather in August »

Weather in September

September, the first month of the autumn, in Delaware, is still a warm month, with temperature in the range of an average low of 53.2°F (11.8°C) and an average high of 73.4°F (23°C). In Delaware, the average high-temperature slightly decreases, from a moderately hot 80.2°F (26.8°C) in August, to a still warm 73.4°F (23°C). Weather in September »

Weather in October

October, the same as September, in Delaware, New Jersey, is a moderate autumn month, with average temperature fluctuating between 60.3°F (15.7°C) and 44.2°F (6.8°C). In Delaware, the average high-temperature drops, from a warm 73.4°F (23°C) in September, to a mild 60.3°F (15.7°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Delaware, New Jersey, with temperature in the range of an average high of 47.8°F (8.8°C) and an average low of 33.4°F (0.8°C). In Delaware, the average high-temperature drops, from a moderate 60.3°F (15.7°C) in October, to a frosty 47.8°F (8.8°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Delaware, New Jersey, with average temperature ranging between max 38.3°F (3.5°C) and min 26.8°F (-2.9°C). In December, the average high-temperature decreases, from a chilly 47.8°F (8.8°C) in November, to a wintry 38.3°F (3.5°C). Weather in December »
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FAQ

What is the coldest month in Delaware?

With an average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 19.8°F (-6.8°C), January is the coldest month in Delaware.

How many days does it rain in Delaware?

Throughout the year, there are 165.9 rainfall days, and 31.61" (803mm) of precipitation is accumulated.

When does it snow in Delaware?

Months with snowfall in Delaware, New Jersey, are January through May, October through December.

How many days does it snow in Delaware?

Throughout the year, in Delaware, New Jersey, there are 42.7 snowfall days, and 21.26" (540mm) of snow is accumulated.

What is the most humid month in Delaware?

February, October and December, with an average relative humidity of 82%, are most humid months in Delaware.

When does it snow the most in Delaware?

The month with the most snowfall in Delaware, New Jersey, is February when snow falls for 11.1 days and typically aggregates up to 5.67" (144mm) of snow.

What is the month with the least sunshine in Delaware?

The month with the least sunshine is February, with an average of 4.3h of sunshine.

What is the least humid month in Delaware?

The least humid month in Delaware, New Jersey, is April, with an average relative humidity of 76%.

When it does not snow in Delaware?

June through September are months without snowfall.

When are the longest days in Delaware?

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

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

With an average maximum UV index of 6, June is the month with the highest UV index.

What is the warmest month in Delaware?

With an average high-temperature of 82.2°F (27.9°C) and an average low-temperature of 61.2°F (16.2°C), July is the warmest month in Delaware, New Jersey.

What is the wettest month in Delaware?

The month with the most rainfall in Delaware is July when the rain falls for 17.4 days and typically aggregates up to 3.11" (79mm) of precipitation.

What month has the most sunshine in Delaware?

With an average of 10.2h of sunshine, July has the most sunshine of the year.

What is the driest month in Delaware?

The month with the least rainfall is September when the rain falls for 11.5 days and typically collects 1.81" (46mm) of precipitation.

What is the month with the shortest days in Delaware?

December has the shortest days of the year, with an average of 9.3h of daylight.

When is the lowest UV index in Delaware?

December is the month with the lowest UV index, with an average maximum UV index of 1.

Average temperature
Delaware, NJ

Average temperature - Delaware, NJ

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure
Delaware, NJ

Average pressure - Delaware, NJ

The month with the highest atmospheric pressure is November (30.11").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed
Delaware, NJ

Average wind speed - Delaware, NJ

The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity
Delaware, NJ

Average humidity - Delaware, NJ

Months with the highest relative humidity are February, October and December (82%).
The month with the lowest relative humidity is April (76%).

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Average rainfall
Delaware, NJ

Average rainfall - Delaware, NJ

The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days
Delaware, NJ

Average rainfall days - Delaware, NJ

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (9.5 days).

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Average snowfall
Delaware, NJ

Average snowfall - Delaware, NJ

The month with the highest snowfall is February (5.67").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Delaware, NJ

Average snowfall days - Delaware, NJ

The month with the highest number of snowfall days is January (11.4 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Delaware, NJ

Average daylight / Average sunshine - Delaware, NJ

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

The month with the most sunshine is July (Average sunshine: 10.2h).
The month with the least sunshine is February (Average sunshine: 4.3h).

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Average sunshine days
Delaware, NJ

Average sunshine days - Delaware, NJ

The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is June (11.1 days).

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Average visibility
Delaware, NJ

Average visibility - Delaware, NJ

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

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