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 onset of May brings a temperature shift, with the average high-temperature moving from a refreshing 55.6°F (13.1°C) in April to a comfortable 66.7°F (19.3°C). Allston's nights in May cool down to an average low-temperature of 49.8°F (9.9°C).Humidity
In Allston, the average relative humidity in May is 72%.Rainfall
In Allston, in May, during 7.8 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, in Allston, Massachusetts, there are 81.8 rainfall days, and 5.51" (140mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Allston. May is the last month it regularly snows in Allston. During 0.1 snowfall days, in May, Allston aggregates 0.04" (1mm) of snow. Throughout the year, in Allston, there are 16.8 snowfall days, and 2.4" (61mm) of snow is accumulated.Daylight
In Allston, the average length of the day in May is 14h and 37min.On the first day of May, sunrise is at 5:38 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 Allston, Massachusetts, the average sunshine in May is 8.4h.UV index
The average daily maximum UV index in May in Allston is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 5 in May translates into this advice:
Prioritize safety - Suggestions to prevent sun damage are offered. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What are May temperatures in Allston?
What is the average humidity in May in Allston?
How much does it rain in Allston in May?
What is the last month it snows in Allston?
How many hours of daylight does Allston have in May?
When is the sunrise / sunset in May in Allston?
How long on average sun shines in May in Allston?
What is the UV index intensity in May in Allston?
Average temperature in May
Allston, 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 (33.8°F).
- Average low temperature in May: 49.8°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in May
Allston, MA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Allston, MA
- Average wind speed in May: 7.2mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in May
Allston, MA
- Average humidity in May: 72%
The months with the highest relative humidity are January and February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall in May
Allston, MA
- Average rainfall in May: 0.43"
The wettest month (with the highest rainfall) is November (0.63").
The driest month (with the least rainfall) is September (0.2").
Average rainfall days in May
Allston, MA
- Average rainfall days in May: 7.8 days
The month with the highest number of rainy days is July (9.6 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in May
Allston, MA
- Average snowfall in May: 0.04"
The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Allston, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Allston, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
Allston, MA
- Average sunshine days in May: 19.4 days
The month with the most sunshine days is January (23.5 days).
The month with the least sunshine days is June (17.4 days).
Average UV index in May
Allston, 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
Allston, 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
Allston, 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).
Allston, Massachusetts, USA
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