May weather forecastGrafton, NY
May
Weather in May
The last month of the spring, May, is a refreshing month in Grafton, New York, with an average temperature varying between 67.3°F (19.6°C) and 46.6°F (8.1°C).Temperature
May sees a rise in the average high-temperature, climbing from a fresh 54°F (12.2°C) in April to an enjoyable 67.3°F (19.6°C). The average low-temperature, in May, in Grafton, New York, is a frosty 46.6°F (8.1°C).Humidity
The average relative humidity in May in Grafton is 76%.Rainfall
The wettest months are May and October, with an average 2.52" (64mm) of rainfall.Snowfall
Months with snowfall in Grafton, New York, are January through May, October through December. May is the last month it regularly snows in Grafton. During 0.3 snowfall days, in May, Grafton aggregates 0.35" (9mm) of snow. In Grafton, during the entire year, snow falls for 44.8 days and aggregates up to 23.27" (591mm) of snow.Daylight
In Grafton, the average length of the day in May is 14h and 39min.On the first day of May in Grafton, sunrise is at 5:46 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 8:25 pm EDT.
Sunshine
The average sunshine in May is 8.9h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In May, a regular UV index of 5 translates into these guidelines:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. 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
Grafton, NY
- Average high temperature in May: 67.3°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in May: 46.6°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in May
Grafton, NY
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Grafton, NY
- Average wind speed in May: 6.6mph
The windiest months (with the highest average wind speed) are January and February (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in May
Grafton, NY
- Average humidity in May: 76%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (74%).
Average rainfall in May
Grafton, NY
- Average rainfall in May: 2.52"
The wettest months (with the highest rainfall) are May and October (2.52").
The driest month (with the least rainfall) is January (1.5").
Average rainfall days in May
Grafton, NY
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in May
Grafton, NY
- Average snowfall in May: 0.35"
The month with the highest snowfall is February (5.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Grafton, NY
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Grafton, NY
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in May
Grafton, NY
- Average sunshine days in May: 13.3 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is June (12.9 days).
Average UV index in May
Grafton, NY
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in May
Grafton, NY
- Average cloud cover in May: 44
The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in May
Grafton, NY
- Average visibility in May: 5mi
The months with the highest visibility are April, July, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, August, September and October (5mi).
