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
In May, the meteorological conditions change with the average high-temperature moving from a mild 56.5°F (13.6°C) in April to an agreeable 68.4°F (20.2°C). An average low-temperature of 48.7°F (9.3°C) is recorded in the month of May in Grassmere Park.Humidity
In Grassmere Park, the average relative humidity in May is 80%.Rainfall
The wettest months are April and May, with an average 2.99" (76mm) of rainfall.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, Grassmere Park aggregates 0.28" (7mm) of snow. In Grassmere Park, Pennsylvania, during the entire year, snow falls for 47.6 days and aggregates up to 22.91" (582mm) of snow.Daylight
In May, the average length of the day in Grassmere Park is 14h and 31min.On the first day of the month, sunrise is at 6:01 am and sunset at 8:03 pm. On the last day of May, sunrise is at 5:34 am and sunset at 8:31 pm EDT.
Sunshine
In Grassmere Park, the average sunshine in May is 8.2h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index, 5 during May, leads to the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
What is the rainiest month?
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 is the sunrise / sunset in May?
How many hours of sunshine does Grassmere Park have in May?
What is the month with the highest UV index?
What is the UV index reading in May?
Average temperature in May
Grassmere Park, 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 (31.8°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in May
Grassmere Park, 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
Grassmere Park, PA
- Average wind speed in May: 6.4mph
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 (4.8mph).
Average humidity in May
Grassmere Park, PA
- Average humidity in May: 80%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).
Average rainfall in May
Grassmere Park, PA
- Average rainfall in May: 2.99"
The wettest months (with the highest rainfall) are April and May (2.99").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in May
Grassmere Park, 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 (9.3 days).
Average snowfall in May
Grassmere Park, PA
- Average snowfall in May: 0.28"
The month with the highest snowfall is January (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Grassmere Park, PA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Grassmere Park, 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 month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in May
Grassmere Park, PA
- Average sunshine days in May: 10.4 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (9.8 days).
Average UV index in May
Grassmere Park, 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
Grassmere Park, PA
- Average cloud cover in May: 49
The months with the most cloud cover are February and December (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in May
Grassmere Park, 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).
Grassmere Park, Pennsylvania, USA
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