May weather forecastJefferson, MA
May
Weather in May
May, the last month of the spring in Jefferson, is an enjoyable month, with an average temperature ranging between max 66.9°F (19.4°C) and min 47.7°F (8.7°C).Temperature
The transition to May introduces an increase in the average high-temperature, shifting from a fresh 54.9°F (12.7°C) in April to a comfortable 66.9°F (19.4°C). In Jefferson, an average low-temperature of 47.7°F (8.7°C) is recorded during May nights.Humidity
In May, the average relative humidity is 75%.Rainfall
In Jefferson, Massachusetts, during May, the rain falls for 16.3 days and regularly aggregates up to 2.32" (59mm) of precipitation. Throughout the year, there are 146.1 rainfall days, and 28.94" (735mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Jefferson aggregates 0.24" (6mm) of snow. Throughout the year, there are 39.9 snowfall days, and 24.45" (621mm) of snow is accumulated.Daylight
In Jefferson, the average length of the day in May is 14h and 37min.On the first day of the month, sunrise is at 5:41 am and sunset at 7:47 pm. On the last day of May, sunrise is at 5:13 am and sunset at 8:17 pm EDT.
Sunshine
In Jefferson, the average sunshine in May is 8.2h.UV index
In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 5 during May leads to these instructions:
Undertake precautions - It is suggested to shield oneself from sunburn. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Jefferson, MA
- Average high temperature in May: 66.9°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 (30.9°F).
- Average low temperature in May: 47.7°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Jefferson, 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 (29.93"Hg).
Average wind speed in May
Jefferson, MA
- Average wind speed in May: 6.8mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in May
Jefferson, MA
- Average humidity in May: 75%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall in May
Jefferson, MA
- Average rainfall in May: 2.32"
The wettest month (with the highest rainfall) is December (2.76").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in May
Jefferson, MA
- Average rainfall days in May: 16.3 days
The month with the highest number of rainy days is May (16.3 days).
The months with the least rainy days are January and February (6.8 days).
Average snowfall in May
Jefferson, MA
- Average snowfall in May: 0.24"
The month with the highest snowfall is February (6.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Jefferson, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Jefferson, 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 12min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
Jefferson, MA
- Average sunshine days in May: 13.4 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (12.8 days).
Average UV index in May
Jefferson, 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
Jefferson, MA
- Average cloud cover in May: 49
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in May
Jefferson, MA
- Average visibility in May: 5mi
The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).
