Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May's onset brings a rise in the average high-temperature, moving from a refreshing 59.4°F (15.2°C) in April to an agreeable 68.7°F (20.4°C). In the month of May, Cornwall experiences an average low-temperature of 51.1°F (10.6°C).Humidity
The months with the highest humidity in Cornwall are February, May and October, with an average relative humidity of 81%.Rainfall
In Cornwall, in May, during 15.9 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, there are 137.4 rainfall days, and 16.26" (413mm) of precipitation is accumulated.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, Cornwall aggregates 0.04" (1mm) of snow. In Cornwall, during the entire year, snow falls for 19.5 days and aggregates up to 6.69" (170mm) of snow.Daylight
In Cornwall, the average length of the day in May is 14h and 26min.On the first day of the month, sunrise is at 6:03 am and sunset at 8:01 pm. On the last day of May, sunrise is at 5:38 am and sunset at 8:28 pm EDT.
Sunshine
The average sunshine in May in Cornwall is 8.2h.UV index
May through July, with an average maximum UV index of 6, are months with the highest UV index in Cornwall. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: In May, the maximum UV index of 6 transforms into these recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
What is the average May temperature in Cornwall?
What are the most humid months in Cornwall?
What is the average humidity in May in Cornwall?
How much does it rain in Cornwall in May?
What is the last month it snows in Cornwall?
How many hours of daylight does Cornwall have in May?
What time are sunrise and sunset in May in Cornwall?
How long on average sun shines in May in Cornwall?
What is the month with the highest UV index in Cornwall?
What is the UV index reading in May in Cornwall?
Average temperature in May
Cornwall, PA
- Average high temperature in May: 68.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in May: 51.1°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in May
Cornwall, 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
Cornwall, PA
- Average wind speed in May: 6.6mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in May
Cornwall, PA
- Average humidity in May: 81%
The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Cornwall, PA
- Average rainfall in May: 1.61"
The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in May
Cornwall, PA
- Average rainfall days in May: 15.9 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in May
Cornwall, PA
- Average snowfall in May: 0.04"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Cornwall, PA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Cornwall, PA
- Average daylight in May: 14h and 2min
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 1min
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
Cornwall, PA
- Average sunshine days in May: 11.5 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in May
Cornwall, 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
Cornwall, PA
- Average cloud cover in May: 48
The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
Cornwall, PA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, July, November and December (6mi).
The months with the lowest visibility are May, August, September and October (5mi).
Cornwall, Pennsylvania, USA
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