May weather forecastSlippery Rock, PA
May
Weather in May
The last month of the spring, May, is an agreeable month in Slippery Rock, Pennsylvania, with an average temperature varying between 49.3°F (9.6°C) and 70.2°F (21.2°C).Temperature
Slippery Rock's transition into May brings a rise in the average high-temperature, moving from a refreshing 57.9°F (14.4°C) in April to an agreeable 70.2°F (21.2°C). The month of May records an average low-temperature of 49.3°F (9.6°C).Humidity
The months with the lowest humidity are April through August, with an average relative humidity of 79%.Rainfall
In Slippery Rock, in May, during 19.8 rainfall days, 3.7" (94mm) of precipitation is typically accumulated. In Slippery Rock, during the entire year, the rain falls for 177.8 days and collects up to 36.65" (931mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Slippery Rock. During 0.5 snowfall days, in May, Slippery Rock aggregates 0.35" (9mm) of snow. In Slippery Rock, during the entire year, snow falls for 75.3 days and aggregates up to 32.05" (814mm) of snow.Daylight
The average length of the day in May is 14h and 30min.On the first day of May, sunrise is at 6:16 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 8:45 pm EDT.
Sunshine
In Slippery Rock, the average sunshine in May is 8.3h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In May, a daily UV index of 5 turns into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. To cut down UV radiation exposure by about half, sport a wide-brim hat. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Slippery Rock, PA
- Average high temperature in May: 70.2°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in May: 49.3°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in May
Slippery Rock, PA
- Average pressure in May: 29.99"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
Slippery Rock, PA
- Average wind speed in May: 6.5mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in May
Slippery Rock, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April, May, June, July and August (79%).
Average rainfall in May
Slippery Rock, PA
- Average rainfall in May: 3.7"
The wettest month (with the highest rainfall) is April (3.74").
The driest month (with the least rainfall) is November (2.36").
Average rainfall days in May
Slippery Rock, PA
- Average rainfall days in May: 19.8 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in May
Slippery Rock, PA
- Average snowfall in May: 0.35"
The month with the highest snowfall is January (8.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Slippery Rock, PA
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is January (19.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Slippery Rock, 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 months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in May
Slippery Rock, PA
- Average sunshine days in May: 9.3 days
The month with the most sunshine days is November (13.1 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in May
Slippery Rock, PA
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Slippery Rock, PA
- Average cloud cover in May: 49
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in May
Slippery Rock, PA
- Average visibility in May: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
