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
Chelmsford's weather shows a temperature rise with the arrival of May, moving from a mild 55.4°F (13°C) in April to a still refreshing 67.1°F (19.5°C). May's average low-temperature reading settles at a chilly 48.7°F (9.3°C).Humidity
In Chelmsford, the average relative humidity in May is 73%.Rainfall
In Chelmsford, in May, it is raining for 15.6 days, with typically 2.01" (51mm) of accumulated precipitation. In Chelmsford, during the entire year, the rain falls for 145.9 days and collects up to 27.48" (698mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.1 snowfall days, in May, Chelmsford aggregates 0.16" (4mm) of snow. In Chelmsford, during the entire year, snow falls for 32.6 days and aggregates up to 21.61" (549mm) of snow.Daylight
The average length of the day in May is 14h and 38min.On the first day of May, sunrise is at 5:38 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:16 pm EDT.
Sunshine
In Chelmsford, the average sunshine in May is 8.5h.UV index
In Chelmsford, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 5 during May translates into the following directions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Chelmsford have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Chelmsford have in May?
What is the UV index reading in May?
Average temperature in May
Chelmsford, MA
- Average high temperature in May: 67.1°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in May
Chelmsford, MA
- Average pressure in May: 30"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
Chelmsford, MA
- Average wind speed in May: 6.6mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in May
Chelmsford, MA
- Average humidity in May: 73%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (70%).
Average rainfall in May
Chelmsford, MA
- Average rainfall in May: 2.01"
The wettest month (with the highest rainfall) is December (2.87").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in May
Chelmsford, MA
- Average rainfall days in May: 15.6 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in May
Chelmsford, MA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Chelmsford, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Chelmsford, MA
- Average daylight in May: 14h and 4min
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 3min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
Chelmsford, MA
- Average sunshine days in May: 13.6 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (13.6 days).
Average UV index in May
Chelmsford, 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
Chelmsford, MA
- Average cloud cover in May: 46
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Chelmsford, MA
- Average visibility in May: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Chelmsford, Massachusetts, USA
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