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
Holliston's transition into May brings a rise in the average high-temperature, moving from a mild 56.1°F (13.4°C) in April to a comfortable 67.3°F (19.6°C). Holliston temperatures generally rest at a low of 48.9°F (9.4°C) during the May nights.Humidity
The average relative humidity in May is 74%.Rainfall
In Holliston, during May, the rain falls for 16.8 days and regularly aggregates up to 2.32" (59mm) of precipitation. Throughout the year, there are 157.5 rainfall days, and 29.53" (750mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Holliston. May is the last month it regularly snows. During 0.1 snowfall days, in May, Holliston aggregates 0.2" (5mm) of snow. Throughout the year, in Holliston, there are 28.8 snowfall days, and 17.32" (440mm) of snow is accumulated.Daylight
The average length of the day in May in Holliston is 14h and 36min.On the first day of May, sunrise is at 5:40 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 8:15 pm EDT.
Sunshine
In Holliston, the average sunshine in May is 8.5h.UV index
In Holliston, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 5 during May, leads to the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Frequently asked questions
What are May temperatures in Holliston?
What is the average humidity in May in Holliston?
How many days does it rain in May in Holliston?
What is the last month it snows in Holliston?
How many hours of daylight does Holliston have in May?
When is the sunrise / sunset in May in Holliston?
How many hours of sunshine does Holliston have in May?
What is the UV index reading in May in Holliston?
Average temperature in May
Holliston, MA
- Average high temperature in May: 67.3°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 (33.1°F).
- Average low temperature in May: 48.9°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 (21°F).
Average pressure in May
Holliston, 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
Holliston, MA
- Average wind speed in May: 6.9mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in May
Holliston, MA
- Average humidity in May: 74%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).
Average rainfall in May
Holliston, MA
- Average rainfall in May: 2.32"
The wettest month (with the highest rainfall) is April (2.87").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in May
Holliston, MA
- Average rainfall days in May: 16.8 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in May
Holliston, MA
- Average snowfall in May: 0.2"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Holliston, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Holliston, 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 12min).
- Average sunshine in May: 8h and 3min
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
Holliston, MA
- Average sunshine days in May: 11.8 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is June (11 days).
Average UV index in May
Holliston, 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
Holliston, 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 33).
Average visibility in May
Holliston, MA
- Average visibility in May: 6mi
The months with the highest visibility are January, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are February, August and September (5mi).
Holliston, Massachusetts, USA
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