Climate and monthly weather forecastWillow Brook, NJ
Climate and monthly weather forecast
Weather in January
January, like December, in Willow Brook, New Jersey, is an icy winter month, with an average temperature varying between 20.5°F (-6.4°C) and 33.3°F (0.7°C). Willow Brook's coldest temperatures are experienced in January, with average high temperatures of 33.3°F (0.7°C) and lows 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 an average temperature varying between 36.7°F (2.6°C) and 22.1°F (-5.5°C). The average high-temperature for February is a still wintry 36.7°F (2.6°C), closely aligning with the temperature of the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a chilly 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). As March arrives, Willow Brook's weather shows a minor increase in high-temperatures, edging from February's icy 36.7°F (2.6°C) to a frosty 44.4°F (6.9°C). Weather in March »Weather in April
April is a refreshing spring month in Willow Brook, New Jersey, with an average temperature ranging between min 39°F (3.9°C) and max 57°F (13.9°C). The shift into April is accompanied by a temperature increase, with the average high-temperature rising from a chilly 44.4°F (6.9°C) in March to a refreshing 57°F (13.9°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Willow Brook, New Jersey, with an average temperature varying between 68.5°F (20.3°C) and 48.9°F (9.4°C). Willow Brook in May sees a temperature change, with average high-temperatures moving from a moderate 57°F (13.9°C) in April to a pleasant 68.5°F (20.3°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Willow Brook, New Jersey, with an average temperature varying between 55.9°F (13.3°C) and 76.6°F (24.8°C). The shift into June is accompanied by a modest temperature increase, with the average high-temperature edging up from an agreeable 68.5°F (20.3°C) in May to a warm 76.6°F (24.8°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Willow Brook, New Jersey, with an average temperature fluctuating between 62.1°F (16.7°C) and 82.9°F (28.3°C). July, recognised by an average high temperature of 82.9°F (28.3°C) and a low of 62.1°F (16.7°C), is Willow Brook's warmest month. July's mean heat index is estimated 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 Willow Brook, New Jersey, with an average temperature ranging between min 60.6°F (15.9°C) and max 80.6°F (27°C). Willow Brook, New Jersey, marks the onset of August with an average high-temperature of a still moderately hot 80.6°F (27°C), a subtle shift from July's 82.9°F (28.3°C). Weather in August »Weather in September
September, the first month of the autumn in Willow Brook, is also a moderately hot month, with an average temperature fluctuating between 54.1°F (12.3°C) and 73.4°F (23°C). The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a moderately hot 80.6°F (27°C) in August to a still warm 73.4°F (23°C). Weather in September »Weather in October
October, like September, in Willow Brook, New Jersey, is another refreshing autumn month, with an average temperature ranging between min 44.8°F (7.1°C) and max 61°F (16.1°C). October comes with a decrease in the average high-temperature, falling from a warm 73.4°F (23°C) in September to a refreshing 61°F (16.1°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Willow Brook, New Jersey, with an average temperature fluctuating between 48.6°F (9.2°C) and 34°F (1.1°C). November's arrival comes with a decrease in the average high-temperature, moving from an enjoyable 61°F (16.1°C) in October to a chilly 48.6°F (9.2°C). Weather in November »Weather in December
December, the first month of the winter in Willow Brook, is also an icy month, with an average temperature ranging between min 27.1°F (-2.7°C) and max 38.8°F (3.8°C). The start of December involves a temperature drop, moving from a chilly 48.6°F (9.2°C) in November to an icy 38.8°F (3.8°C). Weather in December »Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the coldest month, exhibiting average temperatures of 33.3°F (0.7°C) at the peak and 20.5°F (-6.4°C) at the base.
In Willow Brook, during the entire year, the rain falls for 131.1 days and collects up to 13.31" (338mm) of precipitation.
January through May, October through December are months with snowfall.
Throughout the year, there are 25.8 snowfall days, and 6.89" (175mm) of snow is accumulated.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
The months with the highest humidity are February, October and December, with an average relative humidity of 81%.
February has the least sunshine of the year in Willow Brook, with an average of 4.4h of sunshine.
March is the month with the most snowfall. Snow falls for 5.6 days and accumulates 1.69" (43mm) of snow.
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.
With an average relative humidity of 76%, April is the least humid month.
In Willow Brook, snow does not fall in June through September.
With an average of 15h and 6min of daylight, June has the longest days of the year.
The month with the highest UV index is June, with an average maximum UV index of 6.
The month of July sees the average highest temperatures, reaching 82.9°F (28.3°C) at the peak and 62.1°F (16.7°C) at the low.
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.
July has the most sunshine of the year, with an average of 10.3h of sunshine.
The month with the least rainfall is September, when the rain falls for 10.4 days and typically collects 0.63" (16mm) of precipitation.
With an average of 9h and 18min of daylight, December has the shortest days of the year.
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 in January:
30.06"Hg - Average pressure in February:
30.03"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.07"Hg
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 in January:
7.5mph - Average wind speed in February:
7.4mph - Average wind speed in March:
7.5mph - Average wind speed in April:
7.1mph - Average wind speed in May:
5.9mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.7mph - Average wind speed in September:
5.2mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.5mph - Average wind speed in December:
6.8mph
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
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 in January:
0.71" - Average rainfall in February:
0.75" - Average rainfall in March:
0.94" - Average rainfall in April:
1.06" - Average rainfall in May:
1.5" - Average rainfall in June:
1.38"
- Average rainfall in July:
1.77" - Average rainfall in August:
1.26" - Average rainfall in September:
0.63" - Average rainfall in October:
1.26" - Average rainfall in November:
0.91" - Average rainfall in December:
1.14"
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 in January:
5.8 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
10.4 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
13.9 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
10.4 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
7.3 days - Average rainfall days in December:
7.5 days
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 in January:
1.5" - Average snowfall in February:
1.61" - Average snowfall in March:
1.69" - Average snowfall in April:
0.12" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
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 in January:
6.1 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
5.6 days - Average snowfall days in April:
0.8 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.3 days - Average snowfall days in November:
1.1 days - Average snowfall days in December:
4.5 days
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 in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
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).
- Average sunshine in January:
4h and 54min - Average sunshine in February:
4h and 24min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 54min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 24min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 42min
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 in January:
20.4 days - Average sunshine days in February:
16.7 days - Average sunshine days in March:
16.6 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
12.5 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
14.5 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
18.4 days - Average sunshine days in November:
20.4 days - Average sunshine days in December:
19.2 days
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
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 cloud cover
Willow Brook, NJ
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 35).
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).
