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's onset brings a minor rise in the average high-temperature, moving from a chilly 47.1°F (8.4°C) in April to a mild 55.6°F (13.1°C). May nights document an average temperature reading of 50.9°F (10.5°C).Humidity
The months with the highest humidity are May through July, with an average relative humidity of 83%.Rainfall
In Dennis, in May, during 13.2 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Dennis, during the entire year, the rain falls for 129.6 days and collects up to 13.94" (354mm) of precipitation.Snowfall
In Dennis, snow does not fall in May through November.Daylight
In May, the average length of the day in Dennis is 14h and 34min.On the first day of May, sunrise is at 5:36 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 5:08 am and sunset at 8:08 pm EDT.
Sunshine
The average sunshine in May in Dennis, Massachusetts, is 8.7h.UV index
In Dennis, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In May, the maximum UV index of 4 suggests these recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. 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. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the most humid month?
What is the average humidity in May?
How many days does it rain in May in Dennis?
When it does not snow?
Does it snow in May?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Dennis have in May?
What is the UV index intensity in May?
Average temperature in May
Dennis, MA
- Average high temperature in May: 55.6°F
The warmest month (with the highest average high temperature) is August (72.5°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in May: 50.9°F
The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in May
Dennis, MA
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Dennis, MA
- Average wind speed in May: 12.1mph
The windiest month (with the highest average wind speed) is January (16.4mph).
The calmest month (with the lowest average wind speed) is August (10.4mph).
Average humidity in May
Dennis, MA
- Average humidity in May: 83%
The months with the highest relative humidity are May, June and July (83%).
The month with the lowest relative humidity is November (74%).
Average rainfall in May
Dennis, MA
- Average rainfall in May: 1.14"
The wettest month (with the highest rainfall) is October (1.89").
The driest month (with the least rainfall) is August (0.94").
Average rainfall days in May
Dennis, MA
- Average rainfall days in May: 13.2 days
The month with the highest number of rainy days is May (13.2 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in May
Dennis, MA
- Average snowfall in May: 0"
The months with the highest snowfall are January and February (0.63").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in May
Dennis, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Dennis, MA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in May
Dennis, MA
- Average sunshine days in May: 15.9 days
The month with the most sunshine days is September (18.5 days).
The month with the least sunshine days is February (14.8 days).
Average UV index in May
Dennis, MA
- Average UV index in May: 4
The months with the highest UV index are 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
Dennis, MA
- Average cloud cover in May: 43
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in May
Dennis, MA
- 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).
Dennis, Massachusetts, USA
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