May weather forecastSouth Mountain, PA
May
Weather in May
The last month of the spring, May, is a pleasant month in South Mountain, Pennsylvania, with an average temperature fluctuating between 71.1°F (21.7°C) and 51.8°F (11°C).Temperature
An increase in the average high-temperature marks May, moving from April's enjoyable 61.2°F (16.2°C) to a pleasant 71.1°F (21.7°C). May nights observe an average temperature dip to a cool 51.8°F (11°C).Humidity
February, May and October, with an average relative humidity of 80%, are the most humid months.Rainfall
May is the month with the most rainfall. Rain falls for 14.9 days and accumulates 1.26" (32mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In May, the average length of the day is 14h and 23min.On the first day of the month, sunrise is at 6:09 am and sunset at 8:04 pm. On the last day of May, sunrise is at 5:43 am and sunset at 8:31 pm EDT.
Sunshine
In South Mountain, the average sunshine in May is 8.4h.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 unsafe exposure to UV radiation for ordinary individuals.Note: During May, 5 as the daily maximum UV index converts into the following advice:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
South Mountain, PA
- Average high temperature in May: 71.1°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in May: 51.8°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in May
South Mountain, PA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
South Mountain, PA
- Average wind speed in May: 6.1mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in May
South Mountain, PA
- Average humidity in May: 80%
The months with the highest relative humidity are February, May and October (80%).
The month with the lowest relative humidity is July (75%).
Average rainfall in May
South Mountain, PA
- Average rainfall in May: 1.26"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in May
South Mountain, PA
- Average rainfall days in May: 14.9 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in May
South Mountain, PA
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
South Mountain, PA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
South Mountain, 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 24min).
- Average sunshine in May: 8h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
South Mountain, PA
- Average sunshine days in May: 12.9 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in May
South Mountain, PA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
South Mountain, PA
- Average cloud cover in May: 47
The months with the most cloud cover are January and February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
South Mountain, PA
- Average visibility in May: 5mi
The months with the highest visibility are March, April, June, July, November and December (6mi).
The months with the lowest visibility are January, February, May, August, September and October (5mi).
