May weather forecastGrantville, PA
May
Weather in May
The last month of the spring, May, is a pleasant month in Grantville, Pennsylvania, with temperature in the range of an average low of 50.7°F (10.4°C) and an average high of 68.7°F (20.4°C).Temperature
In Grantville, stepping into May brings a temperature increase, moving up from April's refreshing 58.8°F (14.9°C) to a pleasant 68.7°F (20.4°C). The average temperature drops to a fresh 50.7°F (10.4°C) during the night in the month of May.Humidity
February, May, June and October, with an average relative humidity of 81%, are the most humid months.Rainfall
The wettest months are May and July, with an average 3.58" (91mm) of rainfall.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, Grantville aggregates 0.2" (5mm) of snow. In Grantville, during the entire year, snow falls for 32.4 days and aggregates up to 16.69" (424mm) of snow.Daylight
In Grantville, the average length of the day in May is 14h and 26min.On the first day of the month, sunrise is at 6:04 am and sunset at 8:02 pm. On the last day of May, sunrise is at 5:38 am and sunset at 8:30 pm EDT.
Sunshine
In Grantville, the average sunshine in May is 8h.UV index
The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In May, a daily UV index of 5 turns into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Grantville, PA
- Average high temperature in May: 68.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in May: 50.7°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in May
Grantville, PA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Grantville, PA
- Average wind speed in May: 6.5mph
The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in May
Grantville, PA
- Average humidity in May: 81%
The months with the highest relative humidity are February, May, June and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Grantville, PA
- Average rainfall in May: 3.58"
The wettest months (with the highest rainfall) are May and July (3.58").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in May
Grantville, PA
- Average rainfall days in May: 18.6 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in May
Grantville, PA
- Average snowfall in May: 0.2"
The month with the highest snowfall is January (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Grantville, PA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Grantville, PA
- Average daylight in May: 14h and 24min
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 0min
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
Grantville, PA
- Average sunshine days in May: 10.1 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in May
Grantville, PA
- Average UV index in May: 5
The month with the highest UV index is June (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
Grantville, PA
- Average cloud cover in May: 49
The months with the most cloud cover are February and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in May
Grantville, PA
- Average visibility in May: 5mi
The months with the highest visibility are March, April, June, July and November (6mi).
The months with the lowest visibility are January, February, May, August, September, October and December (5mi).
