May weather forecastChatham, NH
May
Weather in May
The last month of the spring, May, is a refreshing month in Chatham, New Hampshire, with an average temperature ranging between min 42.4°F (5.8°C) and max 63.1°F (17.3°C).Temperature
As May arrives, Chatham's weather displays a notable increase in high-temperatures, climbing from April's chilly 48.6°F (9.2°C) to a refreshing 63.1°F (17.3°C). Chatham's average low-temperature in May is measured at a wintry 42.4°F (5.8°C).Humidity
May and November, with an average relative humidity of 77%, are the least humid months in Chatham.Rainfall
In Chatham, in May, it is raining for 15.7 days, with typically 1.61" (41mm) of accumulated precipitation. Throughout the year, there are 158 rainfall days, and 18.58" (472mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.4 snowfall days, in May, Chatham aggregates 0.24" (6mm) of snow. In Chatham, during the entire year, snow falls for 64.6 days and aggregates up to 25.31" (643mm) of snow.Daylight
In Chatham, New Hampshire, the average length of the day in May is 14h and 47min.On the first day of the month, sunrise is at 5:34 am and sunset at 7:48 pm. On the last day of May, sunrise is at 5:03 am and sunset at 8:20 pm EDT.
Sunshine
In May, the average sunshine is 8.2h.UV index
The average daily maximum UV index in May in Chatham is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 4 during May translates into the following directions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. On your guard! Snow's reflection can almost 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
Chatham, NH
- Average high temperature in May: 63.1°F
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is January (24.4°F).
- Average low temperature in May: 42.4°F
The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is January (10.4°F).
Average pressure in May
Chatham, NH
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Chatham, NH
- Average wind speed in May: 5.3mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in May
Chatham, NH
- Average humidity in May: 77%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are May and November (77%).
Average rainfall in May
Chatham, NH
- Average rainfall in May: 1.61"
The wettest months (with the highest rainfall) are April and October (2.17").
The driest month (with the least rainfall) is September (0.94").
Average rainfall days in May
Chatham, NH
- Average rainfall days in May: 15.7 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (9.8 days).
Average snowfall in May
Chatham, NH
- Average snowfall in May: 0.24"
The month with the highest snowfall is February (6.73").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Chatham, NH
- Average snowfall days in May: 0.4 days
The months with the highest number of snowfall days are January and February (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Chatham, NH
- Average daylight in May: 14h and 48min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 8h and 12min
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 18min).
Average sunshine days in May
Chatham, NH
- Average sunshine days in May: 11.8 days
The month with the most sunshine days is September (16.5 days).
The month with the least sunshine days is April (10.1 days).
Average UV index in May
Chatham, NH
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in May
Chatham, NH
- Average cloud cover in May: 49
The month with the most cloud cover is February (Cloud cover 53).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in May
Chatham, NH
- Average visibility in May: 5mi
The months with the highest visibility are April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February, March and September (4mi).
