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 Grafton, the average high-temperature in May rises, from a cool 51.4°F (10.8°C) in April, to a refreshing 64.9°F (18.3°C). Grafton's temperature lowers to a mean of 44.4°F (6.9°C) during the nights in May.Humidity
The months with the lowest humidity are April and May, with an average relative humidity of 75%.Rainfall
In May, the rain falls for 11.1 days. Throughout May, 1.14" (29mm) of precipitation is accumulated. In Grafton, during the entire year, the rain falls for 103.3 days and collects up to 12.52" (318mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Grafton aggregates 0.08" (2mm) of snow. Throughout the year, there are 43.2 snowfall days, and 14.49" (368mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 44min.On the first day of May, sunrise is at 5:39 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 5:09 am and sunset at 8:21 pm EDT.
Sunshine
The average sunshine in May is 8.1h.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 unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 5 in May converts into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the least humid month?
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 is the sunrise / sunset in May?
How many hours of sunshine does Grafton have in May?
What is the month with the highest UV index?
What is the UV index reading in May?
Average temperature in May
Grafton, NH
- Average high temperature in May: 64.9°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in May: 44.4°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in May
Grafton, NH
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Grafton, NH
- Average wind speed in May: 6.1mph
The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in May
Grafton, NH
- Average humidity in May: 75%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in May
Grafton, NH
- Average rainfall in May: 1.14"
The wettest month (with the highest rainfall) is October (1.54").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in May
Grafton, NH
- Average rainfall days in May: 11.1 days
The month with the highest number of rainy days is July (11.6 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in May
Grafton, NH
- Average snowfall in May: 0.08"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Grafton, NH
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is February (10.1 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, NH
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in May
Grafton, NH
- Average sunshine days in May: 16.6 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is February (16.1 days).
Average UV index in May
Grafton, NH
- 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 February and December (UV index 1).
Average cloud cover in May
Grafton, NH
- Average cloud cover in May: 50
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in May
Grafton, NH
- Average visibility in May: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February and September (4mi).
Grafton, New Hampshire, USA
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