May weather forecastBoyertown, PA
May
Weather in May
The last month of the spring, May, is an agreeable month in Boyertown, Pennsylvania, with an average temperature fluctuating between 52°F (11.1°C) and 70.7°F (21.5°C).Temperature
May shows a rise in the average high-temperature, moving from April's mild 60.1°F (15.6°C) to a pleasant 70.7°F (21.5°C). During the month of May, Boyertown experiences a steady low-temperature average of 52°F (11.1°C).Humidity
The average relative humidity in May is 78%.Rainfall
In Boyertown, in May, during 14 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Boyertown, during the entire year, the rain falls for 128.6 days and collects up to 15.16" (385mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Boyertown aggregates 0.16" (4mm) of snow. Throughout the year, there are 17 snowfall days, and 5.43" (138mm) of snow is accumulated.Daylight
In Boyertown, Pennsylvania, the average length of the day in May is 14h and 26min.On the first day of May, sunrise is at 6:00 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 8:25 pm EDT.
Sunshine
In May, the average sunshine is 8.4h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Boyertown. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.Note: During May, 6 as the daily maximum UV index converts into the following advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be alert! Nearly double the UV rays 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
Boyertown, PA
- Average high temperature in May: 70.7°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in May: 52°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure in May
Boyertown, 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
Boyertown, 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
Boyertown, PA
- Average humidity in May: 78%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in May
Boyertown, PA
- Average rainfall in May: 1.38"
The wettest month (with the highest rainfall) is July (1.97").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in May
Boyertown, PA
- Average rainfall days in May: 14 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in May
Boyertown, PA
- Average snowfall in May: 0.16"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Boyertown, PA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Boyertown, 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 36min).
Average sunshine days in May
Boyertown, PA
- Average sunshine days in May: 14.8 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in May
Boyertown, 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
Boyertown, PA
- Average cloud cover in May: 48
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
Boyertown, 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).
