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 is marked by a temperature increase, moving from a cool 55°F (12.8°C) in April to a refreshing 67.5°F (19.7°C). Throughout May, Plains's nights cool down to an average of 47.8°F (8.8°C).Humidity
In Plains, the average relative humidity in May is 79%.Rainfall
In Plains, during May, the rain falls for 18.3 days and regularly aggregates up to 2.52" (64mm) of precipitation. In Plains, during the entire year, the rain falls for 162.1 days and collects up to 24.53" (623mm) 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, Plains aggregates 0.2" (5mm) of snow. Throughout the year, there are 49.4 snowfall days, and 19.92" (506mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 31min.On the first day of the month, sunrise is at 5:59 am and sunset at 8:01 pm. On the last day of May, sunrise is at 5:32 am and sunset at 8:29 pm EDT.
Sunshine
In May, the average sunshine is 8.2h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 5 during May translates into these guidelines:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When are sunrise and sunset in May in Plains?
How long on average sun shines in May?
What are the months with the highest UV index?
How high is the UV index in May?
Average temperature in May
Plains, PA
- Average high temperature in May: 67.5°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in May: 47.8°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in May
Plains, 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
Plains, PA
- Average wind speed in May: 6.5mph
The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in May
Plains, PA
- Average humidity in May: 79%
The months with the highest relative humidity are February and December (84%).
The months with the lowest relative humidity are April, June and July (78%).
Average rainfall in May
Plains, PA
- Average rainfall in May: 2.52"
The wettest month (with the highest rainfall) is July (2.6").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in May
Plains, PA
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in May
Plains, PA
- Average snowfall in May: 0.2"
The month with the highest snowfall is February (5.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Plains, PA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (13.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Plains, PA
- Average daylight in May: 14h and 3min
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 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in May
Plains, PA
- Average sunshine days in May: 10.9 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in May
Plains, PA
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Plains, PA
- Average cloud cover in May: 49
The months with the most cloud cover are January, February and December (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in May
Plains, 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).
Plains, Pennsylvania, USA
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