Climate and monthly weather forecast
Willow Brook, NJ

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Weather in January

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

Weather in February

The last month of the winter, February, is also a wintry month in Willow Brook, New Jersey, with temperature in the range of an average high of 36.7°F (2.6°C) and an average low of 22.1°F (-5.5°C). Willow Brook experiences a recorded average high-temperature of a still wintry 36.7°F (2.6°C) in February, closely aligned with January's 33.3°F (0.7°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Willow Brook, New Jersey, with temperature in the range of an average low of 28.8°F (-1.8°C) and an average high of 44.4°F (6.9°C). March sees a marginal temperature increase, moving from a cold 36.7°F (2.6°C) in February to a chilly 44.4°F (6.9°C). Weather in March »

Weather in April

April in Willow Brook, New Jersey, is a mild spring month, with temperature in the range of an average high of 57°F (13.9°C) and an average low of 39°F (3.9°C). In April, the meteorological conditions change with the average high-temperature moving from a chilly 44.4°F (6.9°C) in March 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 Willow Brook, New Jersey, with an average temperature varying between 48.9°F (9.4°C) and 68.5°F (20.3°C). Willow Brook's transition into May sees a rise in the average high-temperature, advancing from a mild 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 an average temperature fluctuating between 76.6°F (24.8°C) and 55.9°F (13.3°C). The arrival of June introduces a minor uplift in high-temperatures, adjusting 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, the same as June, is a moderately hot summer month in Willow Brook, New Jersey, with an average temperature ranging between min 62.1°F (16.7°C) and max 82.9°F (28.3°C). Willow Brook experiences its highest average temperatures in July, reaching a peak of 82.9°F (28.3°C) and a minimum of 62.1°F (16.7°C). The heat index value for July is computed to be a tropical 89.6°F (32°C). Weather in July »

Weather in August

August, the last month of the summer in Willow Brook, is also a moderately hot month, with temperature in the range of an average low of 60.6°F (15.9°C) and an average high of 80.6°F (27°C). Willow Brook's shift into August is marked by a subtle change to a still moderately hot 80.6°F (27°C) from July's 82.9°F (28.3°C) in temperature. 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 high of 73.4°F (23°C) and an average low of 54.1°F (12.3°C). September implies a soft temperature shift, with average high-temperatures reducing from August's warm 80.6°F (27°C) to a still moderately hot 73.4°F (23°C). Weather in September »

Weather in October

October, like September, in Willow Brook, New Jersey, is another comfortable autumn month, with an average temperature fluctuating between 44.8°F (7.1°C) and 61°F (16.1°C). October brings a decrease in the average high-temperature, falling from September's moderately hot 73.4°F (23°C) to a comfortable 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 an average temperature ranging between max 48.6°F (9.2°C) and min 34°F (1.1°C). Willow Brook's November weather comes with a decrease in average high-temperatures, moving 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

The first month of the winter, December, is still a cold month in Willow Brook, New Jersey, with an average temperature ranging between max 38.8°F (3.8°C) and min 27.1°F (-2.7°C). With December's onset, the weather shows a temperature decrease, transitioning from a frosty 48.6°F (9.2°C) in November to a cold 38.8°F (3.8°C). Weather in December »
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year in Willow Brook?

Willow Brook, New Jersey, experiences its lowest temperatures in January, with an average peak of 33.3°F (0.7°C) and a low of 20.5°F (-6.4°C).

How many days does it rain in Willow Brook?

In Willow Brook, New Jersey, during the entire year, the rain falls for 131.1 days and collects up to 13.31" (338mm) of precipitation.

When does it snow in Willow Brook?

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

How much 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.

When is the lowest UV index in Willow Brook?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What are the most humid months in Willow Brook?

February, October and December, with an average relative humidity of 81%, are most humid months.

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

With an average of 4.4h of sunshine, February has the least sunshine of the year.

What is the snowiest month in Willow Brook?

The month with the most snowfall is March, when snow falls for 5.6 days and typically aggregates up to 1.69" (43mm) of snow.

When is Daylight Saving Time (DST) in Willow Brook?

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

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

When it does not snow in Willow Brook?

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

When are the longest days in Willow Brook?

The month with the longest days in Willow Brook, New Jersey, is June, with an average of 15h and 6min of daylight.

What is the month with the highest UV index in Willow Brook?

The month with the highest UV index in Willow Brook, New Jersey, is June, with an average maximum UV index of 6.

What are the warmest months in Willow Brook?

Temperature readings reach their annual highs in July, averaging 82.9°F (28.3°C) and a minimum average of 62.1°F (16.7°C).

What is the wettest month in Willow Brook?

The month with the most rainfall in Willow Brook, New Jersey, 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?

July has the most sunshine of the year in Willow Brook, with an average of 10.3h of sunshine.

What is the driest month in Willow Brook?

September is the month with the least rainfall. Rain falls for 10.4 days and accumulates 0.63" (16mm) of precipitation.

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

With an average of 9h and 18min of daylight, December has the shortest days of the year in Willow Brook, New Jersey.

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).

Average pressure
Willow Brook, NJ

Average pressure - Willow Brook, 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
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).

Average humidity
Willow Brook, NJ

Average humidity - Willow Brook, NJ

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

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").

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).

Average snowfall
Willow Brook, NJ

Average snowfall - Willow Brook, NJ

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

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).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Willow Brook, NJ

Average daylight / Average sunshine - Willow Brook, 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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

Average sunshine days
Willow Brook, NJ

Average sunshine days - Willow Brook, NJ

The 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).

Average UV index
Willow Brook, NJ

Average UV index - Willow Brook, NJ

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

Average visibility
Willow Brook, NJ

Average visibility - Willow Brook, NJ

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

Willow Brook, New Jersey, USA

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