Monthly weather forecast and climate
Washington, NJ

January, like December, in Washington, New Jersey, is another cold winter month, with average temperature varying between 21.6°F (-5.8°C) and 34°F (1.1°C). The coldest month is January, with an average high-temperature of 34°F (1.1°C) and an average low-temperature of 21.6°F (-5.8°C). Weather in January »

February, the last month of the winter, in Washington, is another cold month, with average temperature ranging between max 37.9°F (3.3°C) and min 23.4°F (-4.8°C). In Washington, the average high-temperature is relatively the same as in January - a still cold 37.9°F (3.3°C). Weather in February »

The first month of the spring, March, is a chilly month in Washington, New Jersey, with average temperature varying between 30.2°F (-1°C) and 45.9°F (7.7°C). In Washington, the average high-temperature slightly increases, from a wintry 37.9°F (3.3°C) in February, to a chilly 45.9°F (7.7°C). Weather in March »

April in Washington, New Jersey, is a mild spring month, with average temperature fluctuating between 58.1°F (14.5°C) and 40.1°F (4.5°C). In April, the average high-temperature rises, from a chilly 45.9°F (7.7°C) in March, to a mild 58.1°F (14.5°C). Weather in April »

May, the last month of the spring, in Washington, is an agreeable month, with average temperature varying between 69.4°F (20.8°C) and 50.4°F (10.2°C). In May, the average high-temperature rises, from a mild 58.1°F (14.5°C) in April, to a pleasant 69.4°F (20.8°C). Weather in May »

June, the first month of the summer, in Washington, is a moderately hot month, with average temperature varying between 57°F (13.9°C) and 77.5°F (25.3°C). In June, the average high-temperature slightly increases, from an agreeable 69.4°F (20.8°C) in May, to a warm 77.5°F (25.3°C). Weather in June »

July, the same as June, is a moderately hot summer month in Washington, New Jersey, with average temperature varying between 83.7°F (28.7°C) and 63°F (17.2°C). The warmest month is July, with an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 63°F (17.2°C). The average heat index is evaluated at a hot 91.9°F (33.3°C). Weather in July »

The last month of the summer, August, is another warm month in Washington, New Jersey, with average temperature fluctuating between 61.3°F (16.3°C) and 81.1°F (27.3°C). In Washington, the average high-temperature is essentially the same as in July - a still warm 81.1°F (27.3°C). Weather in August »

The first month of the autumn, September, is also a moderately hot month in Washington, New Jersey, with average temperature ranging between max 74.3°F (23.5°C) and min 55°F (12.8°C). In September, the average high-temperature marginally drops, from a warm 81.1°F (27.3°C) in August, to a still moderately hot 74.3°F (23.5°C). Weather in September »

October, the same as September, is another enjoyable autumn month in Washington, New Jersey, with average temperature fluctuating between 45.7°F (7.6°C) and 62.1°F (16.7°C). In Washington, New Jersey, the average high-temperature decreases, from a moderately hot 74.3°F (23.5°C) in September, to a comfortable 62.1°F (16.7°C). Weather in October »

November, the last month of the autumn, in Washington, is another chilly month, with average temperature varying between 49.8°F (9.9°C) and 34.9°F (1.6°C). In Washington, New Jersey, the average high-temperature drops, from an enjoyable 62.1°F (16.7°C) in October, to a chilly 49.8°F (9.9°C). Weather in November »

The first month of the winter, December, is also a wintry month in Washington, New Jersey, with average temperature ranging between min 28.4°F (-2°C) and max 40.1°F (4.5°C). In December, the average high-temperature drops, from a frosty 49.8°F (9.9°C) in November, to a cold 40.1°F (4.5°C). Weather in December »

What is the coldest month in Washington?

The coldest month in Washington, New Jersey, is January, with an average high-temperature of 34°F (1.1°C) and an average low-temperature of 21.6°F (-5.8°C).

How much does it rain in Washington?

Throughout the year, in Washington, there are 157.6 rainfall days, and 28.7" (729mm) of precipitation is accumulated.

When does it snow in Washington?

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

How many days does it snow in Washington?

In Washington, New Jersey, during the entire year, snow falls for 30.4 days, and aggregates up to 14.76" (375mm) of snow.

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

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 Washington?

February is the most humid month, with an average relative humidity of 81%.

What is the snowiest month in Washington?

The month with the most snowfall is February when snow falls for 8.3 days and typically aggregates up to 3.82" (97mm) of snow.

What is the month with the least sunshine in Washington?

With an average of 4.6h of sunshine, February has the least sunshine of the year in Washington.

What is the least humid month in Washington?

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

When it does not snow in Washington?

In Washington snow does not fall in June through September.

When are the longest days in Washington?

The month with the longest days in Washington, New Jersey, is June, with an average of 15.1h of daylight.

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

June and July, with an average maximum UV index of 6, are months with the highest UV index in Washington, New Jersey.

What is the warmest month in Washington?

July is the warmest month, with an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 63°F (17.2°C).

What is the rainiest month in Washington?

July is the month with the most rainfall. Rain falls for 15.6 days and accumulates 2.87" (73mm) of precipitation.

What month has the most sunshine in Washington?

With an average of 10.3h of sunshine, July has the most sunshine of the year in Washington.

What is the driest month in Washington?

September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.54" (39mm) of precipitation.

What is the month with the shortest days in Washington?

The month with the shortest days in Washington is December, with an average of 9.3h of daylight.
Average pressure - Washington, NJ

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

Average wind speed - Washington, NJ

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average rainfall - Washington, NJ
Average rainfall days - Washington, NJ

The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (8.1 days).

Average snowfall - Washington, NJ
Average snowfall days - Washington, NJ

The month with the highest number of snowfall days is January (8.4 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Washington, 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: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days - Washington, NJ

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is April (11.8 days).

Average UV index - Washington, NJ
Average visibility - Washington, NJ

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