May weather forecastSouth River, NJ
May
Weather in May
The last month of the spring, May, is an agreeable month in South River, New Jersey, with temperature in the range of an average low of 53.8°F (12.1°C) and an average high of 68.9°F (20.5°C).Temperature
May sees a temperature increase, moving from a mild 59°F (15°C) in April to a pleasant 68.9°F (20.5°C). An average minimum temperature of 53.8°F (12.1°C) is recorded during the month of May.Humidity
February, May, October and December, with an average relative humidity of 77%, are the most humid months.Rainfall
In South River, during May, the rain falls for 16.2 days and regularly aggregates up to 2.95" (75mm) of precipitation. Throughout the year, there are 154 rainfall days, and 30.75" (781mm) of precipitation is accumulated.Snowfall
In South River, snow does not fall in May through October.Daylight
In May, the average length of the day is 14h and 26min.On the first day of May, sunrise is at 5:55 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:29 am and sunset at 8:21 pm EDT.
Sunshine
The average sunshine in May is 8.6h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 6 during May leads to these advisories:
Prevent overexposure. Protection from the sun's harmful effects is needed. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
South River, NJ
- Average high temperature in May: 68.9°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in May: 53.8°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in May
South River, 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
South River, NJ
- Average wind speed in May: 7.5mph
The windiest months (with the highest average wind speed) are January and March (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in May
South River, NJ
- Average humidity in May: 77%
The months with the highest relative humidity are February, May, October and December (77%).
The months with the lowest relative humidity are April and August (73%).
Average rainfall in May
South River, NJ
- Average rainfall in May: 2.95"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in May
South River, NJ
- Average rainfall days in May: 16.2 days
The month with the highest number of rainy days is July (17.4 days).
The months with the least rainy days are January and November (8.5 days).
Average snowfall in May
South River, NJ
- Average snowfall in May: 0"
The month with the highest snowfall is March (3.82").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
South River, NJ
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (5.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
South River, NJ
- Average daylight in May: 14h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
South River, NJ
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (10.5 days).
Average UV index in May
South River, NJ
- Average UV index in May: 6
The months with the highest UV index are May, June, July and August (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
South River, NJ
- Average cloud cover in May: 45
The months with the most cloud cover are February and December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in May
South River, NJ
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
