May weather forecastGlen Carbon, PA
May
Weather in May
May, the last month of the spring in Glen Carbon, is an agreeable month, with an average temperature fluctuating between 49.8°F (9.9°C) and 68.4°F (20.2°C).Temperature
As April transitions into May, a change in temperatures is observed, with average highs moving from a refreshing 57.4°F (14.1°C) to an agreeable 68.4°F (20.2°C). Throughout May, Glen Carbon experiences a low-temperature average of 49.8°F (9.9°C).Humidity
In May, the average relative humidity is 81%.Rainfall
May is the month with the most rainfall. Rain falls for 17.8 days and accumulates 3.07" (78mm) 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, Glen Carbon aggregates 0.28" (7mm) of snow. In Glen Carbon, during the entire year, snow falls for 23 days and aggregates up to 13.46" (342mm) of snow.Daylight
In May, the average length of the day is 14h and 28min.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 5:36 am and sunset at 8:29 pm EDT.
Sunshine
In Glen Carbon, the average sunshine in May is 8.3h.UV index
In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In May, the maximum UV index of 5 suggests this advice:
Heed the precautions - Suggestions to avoid sunburn are made. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Glen Carbon, PA
- Average high temperature in May: 68.4°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in May: 49.8°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in May
Glen Carbon, 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
Glen Carbon, PA
- Average wind speed in May: 6.4mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in May
Glen Carbon, PA
- Average humidity in May: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (77%).
Average rainfall in May
Glen Carbon, PA
- Average rainfall in May: 3.07"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.69").
Average rainfall days in May
Glen Carbon, 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 (5.7 days).
Average snowfall in May
Glen Carbon, PA
- Average snowfall in May: 0.28"
The month with the highest snowfall is March (3.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Glen Carbon, PA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (6.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Glen Carbon, 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 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 24min).
Average sunshine days in May
Glen Carbon, PA
- Average sunshine days in May: 10.8 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in May
Glen Carbon, PA
- Average UV index in May: 5
The months with the highest UV index are 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
Glen Carbon, PA
- Average cloud cover in May: 48
The months with the most cloud cover are February and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
Glen Carbon, PA
- Average visibility in May: 5mi
The months with the highest visibility are January, March, April, June, November and December (6mi).
The months with the lowest visibility are February, May, July, August, September and October (5mi).
