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
The shift into May brings an increase in the average high-temperature, moving from a refreshing 55.9°F (13.3°C) in April to an enjoyable 67.5°F (19.7°C). Throughout May, Acton records an average temperature of 48.7°F (9.3°C) at night.Humidity
In May, the average relative humidity is 72%.Rainfall
In Acton, during May, the rain falls for 12.8 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, there are 116.3 rainfall days, and 15.87" (403mm) 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, Acton aggregates 0.04" (1mm) of snow. Throughout the year, there are 25.5 snowfall days, and 11.42" (290mm) 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, sunrise is at 5:11 am and sunset at 8:16 pm EDT.
Sunshine
In May, the average sunshine in Acton is 8.3h.UV index
In Acton, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 5 in May transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Acton in May?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Acton have in May?
What is the UV index reading in May?
Average temperature in May
Acton, MA
- Average high temperature in May: 67.5°F
The warmest month (with the highest average high temperature) is July (82.4°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 (63.3°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in May
Acton, 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
Acton, MA
- Average wind speed in May: 6.7mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in May
Acton, MA
- Average humidity in May: 72%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).
Average rainfall in May
Acton, MA
- Average rainfall in May: 1.22"
The wettest month (with the highest rainfall) is October (1.65").
The driest month (with the least rainfall) is September (0.79").
Average rainfall days in May
Acton, MA
- Average rainfall days in May: 12.8 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in May
Acton, MA
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (2.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Acton, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Acton, MA
- Average daylight in May: 14h and 4min
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 2min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
Acton, MA
- Average sunshine days in May: 16.4 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is April (15.8 days).
Average UV index in May
Acton, 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
Acton, MA
- Average cloud cover in May: 47
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in May
Acton, 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).
Acton, Massachusetts, USA
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