May weather forecastBelfast, PA
May
Weather in May
The last month of the spring, May, is an agreeable month in Belfast, Pennsylvania, with an average temperature varying between 49.8°F (9.9°C) and 68.5°F (20.3°C).Temperature
With the arrival of May, the average high-temperature transitions from a refreshing 57.6°F (14.2°C) in April to an agreeable 68.5°F (20.3°C). May is noted for a mean low-temperature of 49.8°F (9.9°C).Humidity
In May, the average relative humidity is 79%.Rainfall
In May, the rain falls for 14.9 days. Throughout May, 1.89" (48mm) of precipitation is accumulated. In Belfast, during the entire year, the rain falls for 139.9 days and collects up to 19.88" (505mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.2 snowfall days, in May, Belfast aggregates 0.31" (8mm) of snow. Throughout the year, there are 24.7 snowfall days, and 10.94" (278mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 28min.On the first day of May, sunrise is at 5:58 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:25 pm EDT.
Sunshine
In May, the average sunshine is 8.3h.UV index
In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Belfast, PA
- Average high temperature in May: 68.5°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in May: 49.8°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in May
Belfast, PA
- 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 (29.94"Hg).
Average wind speed in May
Belfast, PA
- Average wind speed in May: 6.2mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in May
Belfast, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Belfast, PA
- Average rainfall in May: 1.89"
The wettest month (with the highest rainfall) is July (2.32").
The driest month (with the least rainfall) is September (1.02").
Average rainfall days in May
Belfast, PA
- Average rainfall days in May: 14.9 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in May
Belfast, PA
- Average snowfall in May: 0.31"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Belfast, PA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Belfast, PA
- Average daylight in May: 14h and 30min
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 18min
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
Belfast, PA
- Average sunshine days in May: 13.1 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is July (13 days).
Average UV index in May
Belfast, PA
- 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
Belfast, PA
- Average cloud cover in May: 48
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in May
Belfast, PA
- 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).
