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
As May arrives, Roselle's weather shows an increase in high-temperatures, moving from April's moderate 58.3°F (14.6°C) to a pleasant 68.5°F (20.3°C). May witnesses an average nighttime temperature of 53.1°F (11.7°C).Humidity
In Roselle, the average relative humidity in May is 76%.Rainfall
In Roselle, during May, the rain falls for 12.6 days and regularly aggregates up to 0.98" (25mm) of precipitation. Throughout the year, there are 117.5 rainfall days, and 9.17" (233mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Roselle.Daylight
In May, the average length of the day in Roselle is 14h and 28min.On the first day of May in Roselle, sunrise is at 5:54 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 8:21 pm EDT.
Sunshine
The average sunshine in May is 8.8h.UV index
In Roselle, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 5 during May translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Around midday, solar radiation is most harmful; hence, exposure should be limited. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Roselle?
What is the average humidity in May in Roselle?
How many days does it rain in May in Roselle?
When it does not snow in Roselle?
Does it snow in Roselle in May?
What is the average length of the day in May in Roselle?
When is the sunrise / sunset in May in Roselle?
How many hours of sunshine does Roselle have in May?
What is the UV index reading in May in Roselle?
Average temperature in May
Roselle, NJ
- Average high temperature in May: 68.5°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in May: 53.1°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in May
Roselle, 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
Roselle, NJ
- Average wind speed in May: 7.1mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in May
Roselle, NJ
- Average humidity in May: 76%
The months with the highest relative humidity are February and December (77%).
The months with the lowest relative humidity are April and August (72%).
Average rainfall in May
Roselle, NJ
- Average rainfall in May: 0.98"
The wettest month (with the highest rainfall) is July (1.22").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in May
Roselle, NJ
- Average rainfall days in May: 12.6 days
The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in May
Roselle, NJ
- Average snowfall in May: 0"
The month with the highest snowfall is March (0.75").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Roselle, 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, September and October (0 days).
Average daylight in May /
Average sunshine in May
Roselle, NJ
- Average daylight in May: 14h and 3min
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 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
Roselle, NJ
- Average sunshine days in May: 14.1 days
The month with the most sunshine days is January (22.1 days).
The month with the least sunshine days is June (13.5 days).
Average UV index in May
Roselle, 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
Roselle, NJ
- Average cloud cover in May: 45
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in May
Roselle, 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).
Roselle, New Jersey, USA
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