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
May brings a temperature increase, with average high-temperatures moving from April's mild 56.1°F (13.4°C) to a pleasant 68.2°F (20.1°C). Delaware experiences an average nighttime temperature of 48.7°F (9.3°C) in the month of May.Humidity
The average relative humidity in May is 79%.Rainfall
In May, in Delaware, the rain falls for 17.3 days. Throughout May, 3.03" (77mm) of precipitation is accumulated. Throughout the year, in Delaware, there are 165.9 rainfall days, and 31.61" (803mm) of precipitation is accumulated.Snowfall
Months with snowfall in Delaware are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Delaware aggregates 0.51" (13mm) of snow. In Delaware, during the entire year, snow falls for 42.7 days and aggregates up to 21.26" (540mm) of snow.Daylight
In Delaware, the average length of the day in May is 14h and 29min.On the first day of the month, sunrise is at 5:57 am and sunset at 7:57 pm. On the last day of May, in Delaware, sunrise is at 5:30 am and sunset at 8:25 pm EDT.
Sunshine
The average sunshine in May in Delaware is 8.4h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: An average UV index of 5 in May transforms into this advice:
Prioritize safety - Suggestions to prevent sun damage are offered. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Delaware?
What is the average humidity in May in Delaware?
How many days does it rain in May in Delaware?
What is the last month it snows in Delaware?
How many hours of daylight does Delaware have in May?
When is the sunrise / sunset in May in Delaware?
How long on average sun shines in May in Delaware?
How high is the UV index in May in Delaware?
Average temperature in May
Delaware, NJ
- Average high temperature in May: 68.2°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in May
Delaware, 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
Delaware, NJ
- Average wind speed in May: 6.1mph
The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in May
Delaware, NJ
- Average humidity in May: 79%
The months with the highest relative humidity are February, October and December (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Delaware, NJ
- Average rainfall in May: 3.03"
The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in May
Delaware, NJ
- Average rainfall days in May: 17.3 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in May
Delaware, NJ
- Average snowfall in May: 0.51"
The month with the highest snowfall is February (5.67").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Delaware, NJ
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (11.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Delaware, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in May
Delaware, NJ
- Average sunshine days in May: 11.6 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in May
Delaware, NJ
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Delaware, NJ
- Average cloud cover in May: 48
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in May
Delaware, NJ
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Delaware, New Jersey, USA
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