May weather forecastBerwyn, PA
May
Weather in May
May, the last month of the spring in Berwyn, is a pleasant month, with an average temperature fluctuating between 53.8°F (12.1°C) and 71.2°F (21.8°C).Temperature
Berwyn, Pennsylvania, in May sees a temperature change, with average high-temperatures moving from a comfortable 61°F (16.1°C) in April to an agreeable 71.2°F (21.8°C). Throughout May, the average low-temperature records at a cool 53.8°F (12.1°C).Humidity
The average relative humidity in May is 76%.Rainfall
In May, the rain falls for 15.1 days. Throughout May, 1.89" (48mm) of precipitation is accumulated. In Berwyn, during the entire year, the rain falls for 138.1 days and collects up to 20.79" (528mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Berwyn aggregates 0.2" (5mm) of snow. Throughout the year, there are 19.3 snowfall days, and 7.68" (195mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 25min.On the first day of May in Berwyn, Pennsylvania, sunrise is at 6:00 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 8:24 pm EDT.
Sunshine
The average sunshine in May is 8.2h.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 health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In May, a daily maximum UV index of 6 leads to the following instructions:
Deflect overexposure. Sun protection is a necessity. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Berwyn, PA
- Average high temperature in May: 71.2°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in May: 53.8°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in May
Berwyn, 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
Berwyn, PA
- Average wind speed in May: 6.6mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in May
Berwyn, PA
- Average humidity in May: 76%
The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April, July and August (73%).
Average rainfall in May
Berwyn, PA
- Average rainfall in May: 1.89"
The wettest month (with the highest rainfall) is August (2.72").
The driest months (with the least rainfall) are January, February and November (1.3").
Average rainfall days in May
Berwyn, PA
- Average rainfall days in May: 15.1 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in May
Berwyn, PA
- Average snowfall in May: 0.2"
The month with the highest snowfall is March (1.93").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Berwyn, PA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Berwyn, 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 12min
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
Berwyn, PA
- Average sunshine days in May: 13.5 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is July (12.7 days).
Average UV index in May
Berwyn, 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
Berwyn, PA
- Average cloud cover in May: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in May
Berwyn, 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).
