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
May's arrival is marked by an increase in the average high-temperature, moving from a moderate 55.9°F (13.3°C) in April to a comfortable 67.5°F (19.7°C). The nighttime temperature, during May, averages of 48.7°F (9.3°C).Humidity
In May, the average relative humidity is 73%.Rainfall
In Westford, during May, the rain falls for 15.1 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Westford, during the entire year, the rain falls for 140.4 days and collects up to 27.13" (689mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Westford. May is the last month it regularly snows in Westford. During 0.1 snowfall days, in May, Westford aggregates 0.16" (4mm) of snow. Throughout the year, in Westford, Massachusetts, there are 35.1 snowfall days, and 24.88" (632mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 38min.On the first day of the month, sunrise is at 5:39 am and sunset at 7:46 pm. On the last day of May, in Westford, sunrise is at 5:10 am and sunset at 8:16 pm EDT.
Sunshine
In May, the average sunshine is 8.4h.UV index
In Westford, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: A maximum daily UV index of 5 during May morphs into the following directions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
What is the temperature in May in Westford?
What is the average humidity in May in Westford?
How many days does it rain in May in Westford?
What is the last month it snows in Westford?
What is the average length of the day in May in Westford?
What time are sunrise and sunset in May in Westford?
How many hours of sunshine does Westford have in May?
What is the UV index reading in May in Westford?
Average temperature in May
Westford, MA
- Average high temperature in May: 67.5°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°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 (19.8°F).
Average pressure in May
Westford, 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
Westford, MA
- Average wind speed in May: 6.6mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in May
Westford, 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
Westford, MA
- Average rainfall in May: 2.01"
The wettest month (with the highest rainfall) is December (2.72").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in May
Westford, MA
- Average rainfall days in May: 15.1 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in May
Westford, MA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (6.57").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Westford, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Westford, 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
Westford, MA
- Average sunshine days in May: 13.8 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in May
Westford, 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
Westford, 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 33).
Average visibility in May
Westford, MA
- Average visibility in May: 6mi
The months with the highest visibility are January, March, April, May, July, August, October, November and December (6mi).
The months with the lowest visibility are February, June and September (5mi).
Westford, Massachusetts, USA
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