May weather forecastEast William Penn, PA
May
Weather in May
May, the last month of the spring in East William Penn, is a pleasant month, with an average temperature fluctuating between 49.5°F (9.7°C) and 68°F (20°C).Temperature
East William Penn's weather shows a temperature rise with the arrival of May, moving from a refreshing 57.2°F (14°C) in April to an agreeable 68°F (20°C). The average low-temperature, in May, is a frosty 49.5°F (9.7°C).Humidity
The average relative humidity in May is 81%.Rainfall
The month with the most rainfall in East William Penn is May, when the rain falls for 19 days and typically aggregates up to 3.39" (86mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, East William Penn aggregates 0.31" (8mm) of snow. In East William Penn, during the entire year, snow falls for 48.5 days and aggregates up to 27.72" (704mm) of snow.Daylight
The average length of the day in May in East William Penn is 14h and 29min.On the first day of May, sunrise is at 6:02 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 8:29 pm EDT.
Sunshine
In East William Penn, Pennsylvania, the average sunshine in May is 8.3h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 5 in May suggests the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Stay sun-safe with clothing that is both closely woven and worn loosely. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
East William Penn, PA
- Average high temperature in May: 68°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 (31.8°F).
- Average low temperature in May: 49.5°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in May
East William Penn, 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
East William Penn, PA
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in May
East William Penn, PA
- Average humidity in May: 81%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).
Average rainfall in May
East William Penn, PA
- Average rainfall in May: 3.39"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in May
East William Penn, PA
- Average rainfall days in May: 19 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in May
East William Penn, PA
- Average snowfall in May: 0.31"
The month with the highest snowfall is January (7.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
East William Penn, PA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
East William Penn, 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 month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 18min).
Average sunshine days in May
East William Penn, PA
- Average sunshine days in May: 9.1 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is May (9.1 days).
Average UV index in May
East William Penn, PA
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
East William Penn, PA
- Average cloud cover in May: 49
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in May
East William Penn, PA
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
