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 commencement of May sees a shift in the average high-temperature, moving from a fresh 53.2°F (11.8°C) in April to a comfortable 65.7°F (18.7°C). In Royalston, the May nights cool down to an average low of 46°F (7.8°C).Humidity
In May, the average relative humidity in Royalston is 75%.Rainfall
In Royalston, in May, during 15.4 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. Throughout the year, there are 143.2 rainfall days, and 28.7" (729mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Royalston aggregates 0.39" (10mm) of snow. Throughout the year, there are 47.7 snowfall days, and 31.93" (811mm) of snow is accumulated.Daylight
In Royalston, the average length of the day in May is 14h and 38min.On the first day of May, sunrise is at 5:42 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 5:13 am and sunset at 8:19 pm EDT.
Sunshine
The average sunshine in May is 8h.UV index
In Royalston, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 in May translates into these instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Royalston in May?
What is the average humidity in May?
How many days does it rain in May in Royalston?
What is the last month it snows?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May in Royalston?
How high is the UV index in May?
Average temperature in May
Royalston, MA
- Average high temperature in May: 65.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in May: 46°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in May
Royalston, 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
Royalston, MA
- Average wind speed in May: 6.6mph
The windiest months (with the highest average wind speed) are January and February (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in May
Royalston, MA
- Average humidity in May: 75%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (74%).
Average rainfall in May
Royalston, MA
- Average rainfall in May: 2.32"
The wettest month (with the highest rainfall) is October (2.95").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in May
Royalston, MA
- Average rainfall days in May: 15.4 days
The months with the highest number of rainy days are May and June (15.4 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in May
Royalston, MA
- Average snowfall in May: 0.39"
The month with the highest snowfall is February (7.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Royalston, MA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Royalston, 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 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in May
Royalston, MA
- Average sunshine days in May: 13.4 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is April (12.7 days).
Average UV index in May
Royalston, MA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Royalston, MA
- Average cloud cover in May: 50
The months with the most cloud cover are February and March (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in May
Royalston, MA
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Royalston, Massachusetts, USA
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