May weather forecastSouth Pottstown, PA
May
Weather in May
The last month of the spring, May, is an agreeable month in South Pottstown, Pennsylvania, with an average temperature fluctuating between 70.7°F (21.5°C) and 52.3°F (11.3°C).Temperature
May brings a temperature increase, with average high-temperatures moving from April's refreshing 60.3°F (15.7°C) to a pleasant 70.7°F (21.5°C). During the nights in May, the temperature averages to a cool 52.3°F (11.3°C).Humidity
The average relative humidity in May is 79%.Rainfall
In South Pottstown, during May, the rain falls for 17 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, in South Pottstown, there are 146.5 rainfall days, and 27.87" (708mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In May, the average length of the day is 14h and 26min.On the first day of May in South Pottstown, sunrise is at 6:01 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 8:25 pm EDT.
Sunshine
The average sunshine in May is 8.4h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 6 in May translates into this advice:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
South Pottstown, PA
- Average high temperature in May: 70.7°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: 52.3°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in May
South Pottstown, 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
South Pottstown, PA
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in May
South Pottstown, PA
- Average humidity in May: 79%
The months with the highest relative humidity are February and October (80%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in May
South Pottstown, PA
- Average rainfall in May: 2.6"
The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in May
South Pottstown, PA
- Average rainfall days in May: 17 days
The months with the highest number of rainy days are May and July (17 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in May
South Pottstown, PA
- Average snowfall in May: 0"
The month with the highest snowfall is March (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
South Pottstown, PA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (5.8 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 Pottstown, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
South Pottstown, PA
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in May
South Pottstown, PA
- Average UV index in May: 6
The months with the highest UV index are May, June, July and August (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
South Pottstown, PA
- Average cloud cover in May: 47
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
South Pottstown, PA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
