May weather forecastBethlehem, PA
May
Weather in May
May rolls in and Bethlehem is bathed in the warm embrace of spring. The Bethlehem weather in May is punctuated with a high temperature that soars to 69.6°F (20.9°C), initiating a real departure from the previous months. With this change, Bethlehem experiences a considerable increase in daylight hours and diminished snowfall days effectively to none. This sunnier disposition allows for outdoor activities, al fresco dining, picnics, and walks in the park. Unquestionably, the city eagerly immerses itself in the joyous springtime merriments, luxuriating in more revitalizing alignments of the sun.Temperature
The start of May signals an increase in the average high-temperature, moving from a refreshing 58.6°F (14.8°C) in April to a pleasant 69.6°F (20.9°C). Throughout May, Bethlehem encounters an average temperature drop to a cool 50.5°F (10.3°C).Humidity
The average relative humidity in May is 79%.Rainfall
In Bethlehem, in May, during 17.8 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. In Bethlehem, during the entire year, the rain falls for 153 days and collects up to 26.81" (681mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Bethlehem. During 0.1 snowfall days, in May, Bethlehem aggregates 0.12" (3mm) of snow. Throughout the year, there are 26.7 snowfall days, and 14.49" (368mm) of snow is accumulated.Daylight
In Bethlehem, the average length of the day in May is 14h and 28min.On the first day of the month, sunrise is at 5:59 am and sunset at 7:57 pm. On the last day of May, sunrise is at 5:32 am and sunset at 8:25 pm EDT.
Sunshine
In May, the average sunshine is 8.3h.UV index
May through July, with an average maximum UV index of 6, are months with the highest UV index in Bethlehem. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: In May, the average maximum UV index of 6 translates into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Bethlehem, PA
- Average high temperature in May: 69.6°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in May: 50.5°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in May
Bethlehem, 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
Bethlehem, PA
- Average wind speed in May: 6.2mph
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
Bethlehem, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in May
Bethlehem, PA
- Average rainfall in May: 2.72"
The wettest month (with the highest rainfall) is July (2.91").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in May
Bethlehem, PA
- Average rainfall days in May: 17.8 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in May
Bethlehem, PA
- Average snowfall in May: 0.12"
The month with the highest snowfall is March (4.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Bethlehem, PA
- Average snowfall days in May: 0.1 days
The months with the highest number of snowfall days are January and February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Bethlehem, PA
- Average daylight in May: 14h and 30min
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 18min).
- Average sunshine in May: 8h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
Bethlehem, PA
- Average sunshine days in May: 11 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (11 days).
Average UV index in May
Bethlehem, PA
- Average UV index in May: 6
The months with the highest UV index are May, June and July (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
Bethlehem, PA
- Average cloud cover in May: 48
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in May
Bethlehem, PA
- Average visibility in May: 5mi
The months with the highest visibility are April, June and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September, October and December (5mi).
