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
An increase in the average high-temperature marks May, moving from April's mild 56.1°F (13.4°C) to a pleasant 68.4°F (20.2°C). In Grampian, May nights witness a steady temperature drop to a frosty 48°F (8.9°C).Humidity
The average relative humidity in May in Grampian, Pennsylvania, is 79%.Rainfall
The month with the most rainfall in Grampian is May, when the rain falls for 17.4 days and typically aggregates up to 2.28" (58mm) of precipitation.Snowfall
Months with snowfall in Grampian are January through May, October through December. May is the last month it regularly snows. During 0.5 snowfall days, in May, Grampian aggregates 0.28" (7mm) of snow. Throughout the year, in Grampian, there are 46.2 snowfall days, and 14.45" (367mm) of snow is accumulated.Daylight
In Grampian, Pennsylvania, the average length of the day in May is 14h and 29min.On the first day of the month, sunrise is at 6:11 am and sunset at 8:11 pm. On the last day of May, sunrise is at 5:44 am and sunset at 8:39 pm EDT.
Sunshine
The average sunshine in May in Grampian, Pennsylvania, is 8h.UV index
The months with the highest UV index in Grampian are May through August, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 5 in May translates into these instructions:
Exercise prevention - Protecting skin and eyes from harm is required. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
What are May temperatures in Grampian?
What is the average humidity in May in Grampian?
What is the wettest month in Grampian?
How much does it rain in Grampian in May?
What is the last month it snows in Grampian?
What is the average length of the day in May in Grampian?
When are sunrise and sunset in May in Grampian?
How many hours of sunshine does Grampian have in May?
What are the months with the highest UV index in Grampian?
What is the UV index intensity in May in Grampian?
Average temperature in May
Grampian, PA
- Average high temperature in May: 68.4°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in May: 48°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in May
Grampian, PA
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Grampian, PA
- Average wind speed in May: 7.1mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in May
Grampian, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is July (77%).
Average rainfall in May
Grampian, PA
- Average rainfall in May: 2.28"
The wettest month (with the highest rainfall) is May (2.28").
The driest months (with the least rainfall) are January and November (1.06").
Average rainfall days in May
Grampian, PA
- Average rainfall days in May: 17.4 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in May
Grampian, PA
- Average snowfall in May: 0.28"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Grampian, PA
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Grampian, 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 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in May
Grampian, PA
- Average sunshine days in May: 10.7 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in May
Grampian, 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
Grampian, PA
- Average cloud cover in May: 51
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in May
Grampian, 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).
Grampian, Pennsylvania, USA
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