August weather forecastGroton, MA
August
Weather in August
August, the last month of the summer in Groton, is another warm month, with an average temperature varying between 60.4°F (15.8°C) and 80.2°F (26.8°C).Temperature
Groton marks the onset of August with an average high-temperature of a still warm 80.2°F (26.8°C), subtly divergent from July's 82°F (27.8°C). The average low-temperature, in August, is a mild 60.4°F (15.8°C).Humidity
The average relative humidity in August is 75%.Rainfall
In August, the rain falls for 13.2 days. Throughout August, 1.81" (46mm) of precipitation is accumulated. Throughout the year, there are 142.2 rainfall days, and 26.97" (685mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In August, the average length of the day is 13h and 52min.On the first day of August, sunrise is at 5:39 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 7:21 pm EDT.
Sunshine
August has the most sunshine of the year in Groton, with an average of 10.3h of sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 6 in August translates into this advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Groton, MA
- Average high temperature in August: 80.2°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in August: 60.4°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 (19.4°F).
Average pressure in August
Groton, MA
- Average pressure in August: 29.97"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 August
Groton, MA
- Average wind speed in August: 5.4mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in August
Groton, MA
- Average humidity in August: 75%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (71%).
Average rainfall in August
Groton, MA
- Average rainfall in August: 1.81"
The wettest month (with the highest rainfall) is December (2.8").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in August
Groton, MA
- Average rainfall days in August: 13.2 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is February (7.7 days).
Average snowfall in August
Groton, MA
- Average snowfall in August: 0"
The month with the highest snowfall is February (6.3").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Groton, MA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Groton, MA
- Average daylight in August: 13h and 54min
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 August: 10h and 18min
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 36min).
Average sunshine days in August
Groton, MA
- Average sunshine days in August: 16.4 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in August
Groton, MA
- Average UV index in August: 6
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 August
Groton, MA
- Average cloud cover in August: 34
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 August
Groton, MA
- Average visibility in August: 5mi
The months with the highest visibility are April, October, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August and September (5mi).
