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
As May arrives, South Lancaster's weather shows an increase in high-temperatures, moving from April's moderate 55.6°F (13.1°C) to a comfortable 67.5°F (19.7°C). During May, the temperature in South Lancaster tends to dip to an average of 47.8°F (8.8°C) at night.Humidity
In May, the average relative humidity is 74%.Rainfall
In South Lancaster, in May, it is raining for 15.8 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, in South Lancaster, there are 150.4 rainfall days, and 28.86" (733mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in South Lancaster. May is the last month it regularly snows in South Lancaster. During 0.1 snowfall days, in May, South Lancaster aggregates 0.12" (3mm) of snow. Throughout the year, in South Lancaster, there are 36.5 snowfall days, and 23.82" (605mm) of snow is accumulated.Daylight
The average length of the day in May in South Lancaster, Massachusetts, is 14h and 37min.On the first day of May, sunrise is at 5:40 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 8:16 pm EDT.
Sunshine
In May, the average sunshine in South Lancaster is 8.3h.UV index
In May, the average daily maximum UV index in South Lancaster is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In May, a regular UV index of 5 translates into these guidelines:
Take precautions - Protection against sun damage is advised. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What is the usual temperature for South Lancaster in May?
What is the average humidity in May in South Lancaster?
How much does it rain in South Lancaster in May?
What is the last month it snows in South Lancaster?
What is the average length of the day in May in South Lancaster?
What time are sunrise and sunset in May in South Lancaster?
How many hours of sunshine does South Lancaster have in May?
What is the UV index reading in May in South Lancaster?
Average temperature in May
South Lancaster, MA
- Average high temperature in May: 67.5°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 (31.5°F).
- Average low temperature in May: 47.8°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in May
South Lancaster, 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 (29.92"Hg).
Average wind speed in May
South Lancaster, 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
South Lancaster, MA
- Average humidity in May: 74%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (71%).
Average rainfall in May
South Lancaster, MA
- Average rainfall in May: 2.2"
The wettest month (with the highest rainfall) is December (2.91").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in May
South Lancaster, MA
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (7.3 days).
Average snowfall in May
South Lancaster, MA
- Average snowfall in May: 0.12"
The month with the highest snowfall is February (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
South Lancaster, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
South Lancaster, 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 12min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in May
South Lancaster, MA
- Average sunshine days in May: 13.8 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in May
South Lancaster, 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
South Lancaster, MA
- Average cloud cover in May: 47
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in May
South Lancaster, MA
- Average visibility in May: 5mi
The months with the highest visibility are March, April, October, November and December (6mi).
The months with the lowest visibility are January, February, May, June, July, August and September (5mi).
South Lancaster, Massachusetts, USA
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