Climate and monthly weather forecast
Sussex, NJ

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Weather in January

January, like December, in Sussex, New Jersey, is an icy winter month, with an average temperature ranging between max 32.7°F (0.4°C) and min 19.8°F (-6.8°C). In Sussex, New Jersey, January is the month with the lowest recorded average temperatures, measuring a high of 32.7°F (0.4°C) and a low of 19.8°F (-6.8°C). Weather in January »

Weather in February

The last month of the winter, February, is also an icy month in Sussex, New Jersey, with an average temperature varying between 21.6°F (-5.8°C) and 36.3°F (2.4°C). February's presence marks an average high-temperature of a still wintry 36.3°F (2.4°C), subtly varied from January's 32.7°F (0.4°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Sussex, New Jersey, with an average temperature fluctuating between 44.4°F (6.9°C) and 28.8°F (-1.8°C). March signals a minor shift in the average high-temperature, moving from February's cold 36.3°F (2.4°C) to a chilly 44.4°F (6.9°C). Weather in March »

Weather in April

April in Sussex, New Jersey, is a mild spring month, with temperature in the range of an average low of 39°F (3.9°C) and an average high of 57°F (13.9°C). With the onset of April, the average high-temperature slightly shifts from March's chilly 44.4°F (6.9°C) to a mild 57°F (13.9°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Sussex, New Jersey, with an average temperature fluctuating between 48.7°F (9.3°C) and 68.4°F (20.2°C). May comes with an increase, with the average high-temperature moving from a mild 57°F (13.9°C) in April to a pleasant 68.4°F (20.2°C). Weather in May »

Weather in June

June, the first month of the summer in Sussex, is a moderately hot 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). The onset of June brings a minor temperature shift, with the average high-temperature moving from an agreeable 68.4°F (20.2°C) in May to a moderately hot 76.5°F (24.7°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Sussex, New Jersey, with an average temperature fluctuating between 82.6°F (28.1°C) and 61.3°F (16.3°C). July, noted for its average high-temperature of 82.6°F (28.1°C) and an average low-temperature of 61.3°F (16.3°C), is considered the warmest month. In July, the average heat index is appraised at a hot 89.6°F (32°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Sussex, New Jersey, with an average temperature varying between 80.2°F (26.8°C) and 59.5°F (15.3°C). Sussex observes an average high-temperature of a still warm 80.2°F (26.8°C) in August, barely different from 82.6°F (28.1°C) in July. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Sussex, New Jersey, with an average temperature varying between 53.4°F (11.9°C) and 73.4°F (23°C). The onset of September is marked by a minor decrease in temperature, transitioning 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 Sussex, New Jersey, is a moderate autumn month, with an average temperature varying between 44.4°F (6.9°C) and 60.4°F (15.8°C). A decrease in the average high-temperature is observed during October, shifting from a moderately hot 73.4°F (23°C) in September to a moderate 60.4°F (15.8°C). Weather in October »

Weather in November

November, the last month of the autumn in Sussex, is also a frosty month, 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). The arrival of November indicates a decrease in the average high-temperature, moving from a moderate 60.4°F (15.8°C) in October to a chilly 48.4°F (9.1°C). Weather in November »

Weather in December

December, the first month of the winter in Sussex, is still a cold month, with an average temperature fluctuating between 26.8°F (-2.9°C) and 38.3°F (3.5°C). The start of December involves a temperature drop, moving from a frosty 48.4°F (9.1°C) in November to an icy 38.3°F (3.5°C). Weather in December »
Updated: Feb 13, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What are the coldest months in Sussex?

Sussex, New Jersey, notes the coldest temperatures in January, with a average high of 32.7°F (0.4°C) and a low of 19.8°F (-6.8°C).

How much does it rain in Sussex?

In Sussex, New Jersey, 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?

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

How much does it snow in Sussex?

In Sussex, New Jersey, during the entire year, snow falls for 36.9 days and aggregates up to 19.84" (504mm) of snow.

What are the most humid months in Sussex?

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

What is the snowiest month in Sussex?

The month with the most snowfall is February, when snow falls for 9.8 days and typically aggregates up to 5.43" (138mm) of snow.

What is the month with the least sunshine in Sussex?

The month with the least sunshine in Sussex, New Jersey, is February, with an average of 4.2h of sunshine.

When is Daylight Saving Time (DST) in Sussex?

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

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

What is the rainiest month in Sussex?

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

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

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

When it does not snow in Sussex?

In Sussex, New Jersey, snow does not fall in June through September.

When are the longest days in Sussex?

June has the longest days of the year in Sussex, New Jersey, with an average of 15h and 6min of daylight.

What time of the year is the hottest in Sussex?

With its average high temperature of 82.6°F (28.1°C) and a low of 61.3°F (16.3°C), July is regarded as the warmest month.

What month has the most sunshine in Sussex?

July has the most sunshine of the year in Sussex, with an average of 10.1h of sunshine.

What is the driest month in Sussex?

September is the month with the least rainfall in Sussex. Rain falls for 11.8 days and accumulates 1.85" (47mm) of precipitation.

What is the month with the shortest days in Sussex?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

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).

Average pressure
Sussex, NJ

Average pressure - Sussex, NJ

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

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).

Average humidity
Sussex, NJ

Average humidity - Sussex, NJ

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

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").

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).

Average snowfall
Sussex, NJ

Average snowfall - Sussex, NJ

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

Average snowfall days
Sussex, NJ

Average snowfall days - Sussex, NJ

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

Average daylight / Average sunshine
Sussex, NJ

Average daylight / Average sunshine - Sussex, NJ

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

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).

Average visibility
Sussex, NJ

Average visibility - Sussex, NJ

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

Sussex, New Jersey, USA

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