Monthly weather forecast and climate
Sussex, NJ

Weather in January

January, the same as December, is another cold winter month in Sussex, New Jersey, with average temperature varying between 19.8°F (-6.8°C) and 32.7°F (0.4°C). January is the coldest month, with an average high-temperature of 32.7°F (0.4°C) and an average low-temperature of 19.8°F (-6.8°C). Weather in January »

Weather in February

The last month of the winter, February, is another cold month in Sussex, New Jersey, with average temperature fluctuating between 36.3°F (2.4°C) and 21.6°F (-5.8°C). In February, the average high-temperature is essentially 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 Sussex, is a chilly month, with average temperature varying between 44.4°F (6.9°C) and 28.8°F (-1.8°C). In March, the average high-temperature slightly increases, from a wintry 36.3°F (2.4°C) in February, to a chilly 44.4°F (6.9°C). Weather in March »

Weather in April

April is a mild spring month in Sussex, New Jersey, with average temperature fluctuating between 39°F (3.9°C) and 57°F (13.9°C). In April, the average high-temperature increases, from a chilly 44.4°F (6.9°C) in March, to a moderate 57°F (13.9°C). Weather in April »

Weather in May

May, the last month of the spring, in Sussex, is a pleasant month, with average temperature ranging between max 68.4°F (20.2°C) and min 48.7°F (9.3°C). In May, the average high-temperature increases, from a mild 57°F (13.9°C) in April, to an agreeable 68.4°F (20.2°C). Weather in May »

Weather in June

June, the first month of the summer, in Sussex, is a warm month, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 55.6°F (13.1°C). In Sussex, the average high-temperature slightly increases, from a pleasant 68.4°F (20.2°C) in May, to a warm 76.5°F (24.7°C). Weather in June »

Weather in July

July, like June, in Sussex, New Jersey, is another warm summer month, with temperature in the range of an average low of 61.3°F (16.3°C) and an average high of 82.6°F (28.1°C). The warmest month is July, with an average high-temperature of 82.6°F (28.1°C) and an average low-temperature of 61.3°F (16.3°C). The average heat index is evaluated at a hot 89.6°F (32°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Sussex, New Jersey, with temperature in the range of an average low of 59.5°F (15.3°C) and an average high of 80.2°F (26.8°C). In Sussex, 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 Sussex, is still a warm month, with temperature in the range of an average high of 73.4°F (23°C) and an average low of 53.4°F (11.9°C). In September, 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, like September, is a moderate autumn month in Sussex, New Jersey, with temperature in the range of an average high of 60.4°F (15.8°C) and an average low of 44.4°F (6.9°C). In October, the average high-temperature drops, from a moderately hot 73.4°F (23°C) in September, to a mild 60.4°F (15.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Sussex, New Jersey, with temperature in the range of an average high of 48.4°F (9.1°C) and an average low of 33.4°F (0.8°C). In November, the average high-temperature drops, from a moderate 60.4°F (15.8°C) in October, to a frosty 48.4°F (9.1°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Sussex, New Jersey, with average temperature ranging between min 26.8°F (-2.9°C) and max 38.3°F (3.5°C). In December, the average high-temperature decreases, from a chilly 48.4°F (9.1°C) in November, to a cold 38.3°F (3.5°C). Weather in December »
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FAQ

What is the coldest month in Sussex?

The coldest month is January, with an average high-temperature of 32.7°F (0.4°C) and an average low-temperature of 19.8°F (-6.8°C).

How much does it rain in Sussex?

In Sussex, during the entire year, the rain falls for 164.9 days and collects up to 31.89" (810mm) of precipitation.

When does it snow in Sussex?

Months with snowfall are January through May, October through December.

How much does it snow in Sussex?

Throughout the year, there are 36.9 snowfall days, and 19.84" (504mm) of snow is accumulated.

What are the most humid months in Sussex?

Months with the highest humidity in Sussex are February, October and December, with an average relative humidity of 82%.

When does it snow the most in Sussex?

February is the month with the most snowfall. Snow falls for 9.8 days and accumulates 5.43" (138mm) of snow.

What is the month with the least sunshine in Sussex?

February has the least sunshine of the year, with an average of 4.2h of sunshine.

What is the least humid month in Sussex?

With an average relative humidity of 76%, April is the least humid month.

What is the wettest month in Sussex?

May is the month with the most rainfall in Sussex. Rain falls for 18.1 days and accumulates 3.19" (81mm) of precipitation.

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

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

When it does not snow in Sussex?

In Sussex snow does not fall in June through September.

When are the longest days in Sussex?

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

What is the warmest month in Sussex?

July is the warmest month in Sussex, with an average high-temperature of 82.6°F (28.1°C) and an average low-temperature of 61.3°F (16.3°C).

What month has the most sunshine in Sussex?

The month with the most sunshine in Sussex is July, with an average of 10.1h of sunshine.

What is the driest month in Sussex?

The month with the least rainfall is September when the rain falls for 11.8 days and typically collects 1.85" (47mm) of precipitation.

What is the month with the shortest days in Sussex?

With an average of 9.3h of daylight, December has the shortest days of the year in Sussex, New Jersey.

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

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

Average temperature
Sussex, NJ

Average temperature - Sussex, NJ

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (32.7°F).

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure
Sussex, NJ

Average pressure - Sussex, 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
Sussex, NJ

Average wind speed - Sussex, NJ

The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity
Sussex, NJ

Average humidity - Sussex, 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
Sussex, NJ

Average rainfall - Sussex, NJ

The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.85").

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Average rainfall days
Sussex, NJ

Average rainfall days - Sussex, NJ

The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (8.7 days).

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Average snowfall
Sussex, NJ

Average snowfall - Sussex, NJ

The month with the highest snowfall is February (5.43").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Sussex, NJ

Average snowfall days - Sussex, NJ

Months with the highest number of snowfall days are January and February (9.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Sussex, NJ

Average daylight / Average sunshine - Sussex, 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: 10.1h).
The month with the least sunshine is February (Average sunshine: 4.2h).

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Average sunshine days
Sussex, NJ

Average sunshine days - Sussex, NJ

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is April (10.4 days).

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Average visibility
Sussex, NJ

Average visibility - Sussex, NJ

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

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