May weather forecastNeedham, MA
May
Weather in May
The last month of the spring, May, is an enjoyable month in Needham, Massachusetts, with an average temperature ranging between max 66.7°F (19.3°C) and min 49.6°F (9.8°C).Temperature
In May, the average high-temperature increases from a refreshing 55.9°F (13.3°C) in April to a comfortable 66.7°F (19.3°C). Throughout May nights, Needham registers an average low-temperature of 49.6°F (9.8°C).Humidity
In May, the average relative humidity is 73%.Rainfall
In May, the rain falls for 8.9 days. Throughout May, 0.51" (13mm) of precipitation is accumulated. In Needham, during the entire year, the rain falls for 85.9 days and collects up to 5.87" (149mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. May is the last month it regularly snows. During 0.1 snowfall days, in May, Needham aggregates 0.08" (2mm) of snow. Throughout the year, there are 18.8 snowfall days, and 3.15" (80mm) of snow is accumulated.Daylight
In Needham, the average length of the day in May is 14h and 37min.On the first day of May, sunrise is at 5:39 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:14 pm EDT.
Sunshine
In Needham, the average sunshine in May is 8.5h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 5 in May interprets into the following advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Needham, MA
- Average high temperature in May: 66.7°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in May: 49.6°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in May
Needham, MA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Needham, MA
- Average wind speed in May: 7.1mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in May
Needham, MA
- Average humidity in May: 73%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).
Average rainfall in May
Needham, MA
- Average rainfall in May: 0.51"
The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.24").
Average rainfall days in May
Needham, MA
- Average rainfall days in May: 8.9 days
The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in May
Needham, MA
- Average snowfall in May: 0.08"
The month with the highest snowfall is December (0.91").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Needham, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (4.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Needham, MA
- Average daylight in May: 14h and 36min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
Needham, MA
- Average sunshine days in May: 18.7 days
The months with the most sunshine days are January and November (22.5 days).
The month with the least sunshine days is June (17.5 days).
Average UV index in May
Needham, MA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Needham, MA
- Average cloud cover in May: 46
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in May
Needham, MA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
