May weather forecastWillow Brook, NJ
May
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).Temperature
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). May witnesses an average nighttime temperature of 48.9°F (9.4°C).Humidity
In Willow Brook, New Jersey, the average relative humidity in May is 79%.Rainfall
In Willow Brook, during May, the rain falls for 15.3 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, there are 131.1 rainfall days, and 13.31" (338mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Willow Brook aggregates 0.16" (4mm) of snow. In Willow Brook, during the entire year, snow falls for 25.8 days and aggregates up to 6.89" (175mm) of snow.Daylight
In May, the average length of the day is 14h and 31min.On the first day of May, sunrise is at 5:53 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 5:27 am and sunset at 8:23 pm EDT.
Sunshine
In May, the average sunshine is 8.3h.UV index
In May, the average daily maximum UV index in Willow Brook is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: During May, 5 as the daily maximum UV index converts into the following advice:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Willow Brook, NJ
- Average high temperature in May: 68.5°F
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).
- Average low temperature in May: 48.9°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 in May
Willow Brook, NJ
- Average pressure in May: 30.01"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 in May
Willow Brook, NJ
- Average wind speed in May: 5.9mph
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 in May
Willow Brook, NJ
- Average humidity in May: 79%
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 in May
Willow Brook, NJ
- Average rainfall in May: 1.5"
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 in May
Willow Brook, NJ
- Average rainfall days in May: 15.3 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 in May
Willow Brook, NJ
- Average snowfall in May: 0.16"
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 in May
Willow Brook, NJ
- Average snowfall days in May: 0.1 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 in May /
Average sunshine in May
Willow Brook, NJ
- Average daylight in May: 14h and 30min
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 May: 8h 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 in May
Willow Brook, NJ
- Average sunshine days in May: 12.8 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 in May
Willow Brook, NJ
- Average UV index in May: 5
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 in May
Willow Brook, NJ
- Average cloud cover in May: 49
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 in May
Willow Brook, NJ
- Average visibility in May: 5mi
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).
