May weather forecastDewey Beach, DE
May
Weather in May
May is when Dewey Beach, Delaware, truly starts to show signs of approaching summer. The landscape transitions into shades of green and the air is filled with the scent of blossoming flowers. The high temperature marks a palpable increase to an average of 65.5°F (18.6°C), while the low registers at 58.5°F (14.7°C). The city attracts numerous tourists during this month as its celebrated coastlines offer respite from the heat. As June arrives, the weather turns further hotter, signalling the advent of summer.Temperature
Dewey Beach experiences a temperature shift with the start of May, with average high-temperatures moving from a refreshing 56.5°F (13.6°C) in April to a comfortable 65.5°F (18.6°C). In Dewey Beach, the month of May brings a consistent average low-temperature of 58.5°F (14.7°C), slightly cooler than its daytime highs.Humidity
With an average relative humidity of 82%, May is the most humid month.Rainfall
In May, in Dewey Beach, the rain falls for 9 days. Throughout May, 0.55" (14mm) of precipitation is accumulated. In Dewey Beach, during the entire year, the rain falls for 89.4 days and collects up to 6.18" (157mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In May, the average length of the day is 14h and 18min.On the first day of May, sunrise is at 6:01 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 5:37 am and sunset at 8:18 pm EDT.
Sunshine
In May, the average sunshine is 9.4h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 6 in May interprets into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Dewey Beach, DE
- Average high temperature in May: 65.5°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (41.4°F).
- Average low temperature in May: 58.5°F
The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).
Average pressure in May
Dewey Beach, DE
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Dewey Beach, DE
- Average wind speed in May: 10.7mph
The windiest month (with the highest average wind speed) is January (13mph).
The calmest month (with the lowest average wind speed) is August (8.8mph).
Average humidity in May
Dewey Beach, DE
- Average humidity in May: 82%
The month with the highest relative humidity is May (82%).
The month with the lowest relative humidity is November (73%).
Average rainfall in May
Dewey Beach, DE
- Average rainfall in May: 0.55"
The wettest month (with the highest rainfall) is October (0.71").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in May
Dewey Beach, DE
- Average rainfall days in May: 9 days
The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is November (4.9 days).
Average snowfall in May
Dewey Beach, DE
- Average snowfall in May: 0"
The months with the highest snowfall are January and December (0.12").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Dewey Beach, DE
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (2.4 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
Dewey Beach, DE
- Average daylight in May: 14h and 18min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 9h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in May
Dewey Beach, DE
- Average sunshine days in May: 19.5 days
The month with the most sunshine days is January (23.5 days).
The months with the least sunshine days are June and July (18.2 days).
Average UV index in May
Dewey Beach, DE
- 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 and December (UV index 2).
Average cloud cover in May
Dewey Beach, DE
- Average cloud cover in May: 38
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 24).
Average visibility in May
Dewey Beach, DE
- 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).
