Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
With the onset of May, Riverdale's average high-temperature sees a rise, moving from April's moderate 57.7°F (14.3°C) to a pleasant 68.7°F (20.4°C). Riverdale observes an average low-temperature of 53.2°F (11.8°C) during May.Humidity
In May, the average relative humidity in Riverdale is 73%.Rainfall
In May, the rain falls for 11.4 days. Throughout May, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 106.1 rainfall days, and 8.31" (211mm) of precipitation is accumulated.Snowfall
May through November are months without snowfall.Daylight
In Riverdale, the average length of the day in May is 14h and 29min.On the first day of the month, sunrise is at 5:54 am and sunset at 7:54 pm. On the last day of May, in Riverdale, New Jersey, sunrise is at 5:27 am and sunset at 8:22 pm EDT.
Sunshine
In May, the average sunshine is 8.7h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high UV index of 5 in May translates into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Riverdale in May?
What is the average humidity in May in Riverdale?
How many days does it rain in May in Riverdale?
When it does not snow in Riverdale?
Does it snow in Riverdale in May?
How many hours of daylight does Riverdale have in May?
When are sunrise and sunset in May in Riverdale?
How long on average sun shines in May in Riverdale?
What is the UV index intensity in May in Riverdale?
Average temperature in May
Riverdale, NJ
- Average high temperature in May: 68.7°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in May: 53.2°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°F).
Average pressure in May
Riverdale, NJ
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Riverdale, NJ
- Average wind speed in May: 7.1mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in May
Riverdale, NJ
- Average humidity in May: 73%
The months with the highest relative humidity are February and December (76%).
The month with the lowest relative humidity is August (69%).
Average rainfall in May
Riverdale, NJ
- Average rainfall in May: 0.75"
The wettest month (with the highest rainfall) is July (0.98").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days in May
Riverdale, NJ
- Average rainfall days in May: 11.4 days
The month with the highest number of rainy days is May (11.4 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in May
Riverdale, NJ
- Average snowfall in May: 0"
The month with the highest snowfall is December (0.35").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in May
Riverdale, NJ
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January and February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Riverdale, NJ
- Average daylight in May: 14h and 3min
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 4min
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
Riverdale, NJ
- Average sunshine days in May: 15.9 days
The month with the most sunshine days is January (22.5 days).
The months with the least sunshine days are May and June (15.9 days).
Average UV index in May
Riverdale, NJ
- Average UV index in May: 5
The months with the highest UV index are 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
Riverdale, NJ
- Average cloud cover in May: 45
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in May
Riverdale, 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).
Riverdale, New Jersey, USA
Weather forecast for your location
2. Allow the app to use your location