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 signals a shift in the average high-temperature, moving from April's moderate 58.5°F (14.7°C) to a pleasant 69.4°F (20.8°C). Nighttime temperature dips to a mean of 50.2°F (10.1°C) during May.Humidity
The average relative humidity in May is 79%.Rainfall
In Dewey Heights, in May, during 17.2 rainfall days, 2.91" (74mm) of precipitation is typically accumulated. In Dewey Heights, during the entire year, the rain falls for 162.5 days and collects up to 31.69" (805mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Dewey Heights aggregates 0.16" (4mm) of snow. In Dewey Heights, during the entire year, snow falls for 32.3 days and aggregates up to 17.24" (438mm) of snow.Daylight
In May, the average length of the day is 14h and 28min.On the first day of the month, sunrise is at 5:59 am and sunset at 7:58 pm. On the last day of May, sunrise is at 5:33 am and sunset at 8:26 pm EDT.
Sunshine
The average sunshine in May is 8.2h.UV index
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 exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 5 during May translates into the following directions:
Exercise prevention - Precautions against solar damage are endorsed. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Dewey Heights have in May?
When is the sunrise / sunset in May in Dewey Heights?
How many hours of sunshine does Dewey Heights have in May?
How high is the UV index in May in Dewey Heights?
Average temperature in May
Dewey Heights, PA
- Average high temperature in May: 69.4°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in May: 50.2°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in May
Dewey Heights, PA
- Average pressure in May: 30.01"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 Heights, PA
- Average wind speed in May: 6.2mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in May
Dewey Heights, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in May
Dewey Heights, PA
- Average rainfall in May: 2.91"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in May
Dewey Heights, PA
- Average rainfall days in May: 17.2 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (9.9 days).
Average snowfall in May
Dewey Heights, PA
- Average snowfall in May: 0.16"
The month with the highest snowfall is March (4.88").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Dewey Heights, PA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Dewey Heights, PA
- 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
Dewey Heights, PA
- Average sunshine days in May: 11.8 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is February (11.7 days).
Average UV index in May
Dewey Heights, PA
- Average UV index in May: 5
The months with the highest UV index are June and July (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
Dewey Heights, PA
- Average cloud cover in May: 49
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in May
Dewey Heights, PA
- Average visibility in May: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Dewey Heights, Pennsylvania, USA
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