Monthly weather forecast and climate
Willow Brook, NJ

Weather in January

January, like December, in Willow Brook, New Jersey, is a wintry winter month, with average temperature varying between 33.3°F (0.7°C) and 20.5°F (-6.4°C). The coldest month is January, with an average high-temperature of 33.3°F (0.7°C) and an average low-temperature of 20.5°F (-6.4°C). Weather in January »

Weather in February

February, the last month of the winter, in Willow Brook, is also a wintry month, with average temperature fluctuating between 36.7°F (2.6°C) and 22.1°F (-5.5°C). In February, the average high-temperature is practically the same as in January - a still cold 36.7°F (2.6°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Willow Brook, New Jersey, with average temperature ranging between min 28.8°F (-1.8°C) and max 44.4°F (6.9°C). In Willow Brook, the average high-temperature marginally rises, from a wintry 36.7°F (2.6°C) in February, to a frosty 44.4°F (6.9°C). Weather in March »

Weather in April

April is a moderate spring month in Willow Brook, New Jersey, with average temperature varying between 57°F (13.9°C) and 39°F (3.9°C). In April, the average high-temperature rises, 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 Willow Brook, is an agreeable month, with average temperature fluctuating between 48.9°F (9.4°C) and 68.5°F (20.3°C). In Willow Brook, the average high-temperature increases, from a moderate 57°F (13.9°C) in April, to an agreeable 68.5°F (20.3°C). Weather in May »

Weather in June

June, the first month of the summer, in Willow Brook, is a warm month, with average temperature varying between 55.9°F (13.3°C) and 76.6°F (24.8°C). In June, the average high-temperature slightly increases, from a pleasant 68.5°F (20.3°C) in May, to a moderately hot 76.6°F (24.8°C). Weather in June »

Weather in July

July, like June, in Willow Brook, New Jersey, is another warm summer month, with average temperature varying between 62.1°F (16.7°C) and 82.9°F (28.3°C). July is the warmest month, with an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 62.1°F (16.7°C). In July, the average heat index is appraised at a tropical 90.3°F (32.4°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Willow Brook, New Jersey, with average temperature varying between 60.6°F (15.9°C) and 80.6°F (27°C). In Willow Brook, the average high-temperature in August is practically the same as in July - a still warm 80.6°F (27°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Willow Brook, New Jersey, with temperature in the range of an average low of 54.1°F (12.3°C) and an average high of 73.4°F (23°C). In Willow Brook, the average high-temperature marginally drops, from a warm 80.6°F (27°C) in August, to a still moderately hot 73.4°F (23°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Willow Brook, New Jersey, with average temperature varying between 44.8°F (7.1°C) and 61°F (16.1°C). In Willow Brook, the average high-temperature decreases, from a warm 73.4°F (23°C) in September, to an enjoyable 61°F (16.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Willow Brook, New Jersey, with temperature in the range of an average high of 48.6°F (9.2°C) and an average low of 34°F (1.1°C). In Willow Brook, the average high-temperature in November drops, from an enjoyable 61°F (16.1°C) in October, to a frosty 48.6°F (9.2°C). Weather in November »

Weather in December

December, the first month of the winter, in Willow Brook, is also a wintry month, with average temperature fluctuating between 27.1°F (-2.7°C) and 38.8°F (3.8°C). In December, the average high-temperature drops, from a chilly 48.6°F (9.2°C) in November, to a cold 38.8°F (3.8°C). Weather in December »
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FAQ

What is the coldest month in Willow Brook?

The coldest month in Willow Brook, New Jersey, is January, with an average high-temperature of 33.3°F (0.7°C) and an average low-temperature of 20.5°F (-6.4°C).

How much does it rain in Willow Brook?

Throughout the year, in Willow Brook, New Jersey, there are 131.1 rainfall days, and 13.31" (338mm) of precipitation is accumulated.

When does it snow in Willow Brook?

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

How many days does it snow in Willow Brook?

Throughout the year, in Willow Brook, there are 25.8 snowfall days, and 6.89" (175mm) of snow is accumulated.

What are the months with the lowest UV index in Willow Brook?

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

What is the most humid month in Willow Brook?

Months with the highest humidity in Willow Brook, New Jersey, are February, October and December, with an average relative humidity of 81%.

What is the month with the least sunshine in Willow Brook?

February has the least sunshine of the year in Willow Brook, with an average of 4.4h of sunshine.

What is the snowiest month in Willow Brook?

March is the month with the most snowfall. Snow falls for 5.6 days and accumulates 1.69" (43mm) of snow.

What is the least humid month in Willow Brook?

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

When it does not snow in Willow Brook?

June through September are months without snowfall.

When are the longest days in Willow Brook?

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

When is the highest UV index in Willow Brook?

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

What is the warmest month in Willow Brook?

The warmest month in Willow Brook, New Jersey, is July, with an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 62.1°F (16.7°C).

What is the rainiest month in Willow Brook?

The month with the most rainfall is July when the rain falls for 15.8 days and typically aggregates up to 1.77" (45mm) of precipitation.

What month has the most sunshine in Willow Brook?

The month with the most sunshine in Willow Brook, New Jersey, is July, with an average of 10.3h of sunshine.

What is the driest month in Willow Brook?

The month with the least rainfall in Willow Brook is September when the rain falls for 10.4 days and typically collects 0.63" (16mm) of precipitation.

What is the month with the shortest days in Willow Brook?

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

Average temperature
Willow Brook, NJ

Average temperature - Willow Brook, NJ

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.3°F).

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

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Average pressure
Willow Brook, NJ

Average pressure - Willow Brook, 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
Willow Brook, NJ

Average wind speed - Willow Brook, NJ

The windiest months (with the highest average wind speed) are January and March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity
Willow Brook, NJ

Average humidity - Willow Brook, NJ

Months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (76%).

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Average rainfall
Willow Brook, NJ

Average rainfall - Willow Brook, NJ

The wettest month (with the highest rainfall) is July (1.77").
The driest month (with the least rainfall) is September (0.63").

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Average rainfall days
Willow Brook, NJ

Average rainfall days - Willow Brook, NJ

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is January (5.8 days).

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Average snowfall
Willow Brook, NJ

Average snowfall - Willow Brook, NJ

The month with the highest snowfall is March (1.69").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Willow Brook, NJ

Average snowfall days - Willow Brook, NJ

The month with the highest number of snowfall days is February (7.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Willow Brook, NJ

Average daylight / Average sunshine - Willow Brook, 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: 4.4h).

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Average sunshine days
Willow Brook, NJ

Average sunshine days - Willow Brook, NJ

Months with the most sunshine days are January and November (20.4 days).
The month with the least sunshine days is June (12.5 days).

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Average UV index
Willow Brook, NJ

Average UV index - Willow Brook, NJ

The month with the highest UV index is June (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average visibility
Willow Brook, NJ

Average visibility - Willow Brook, 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).

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