August weather forecastOld Mystic, CT
August
Weather in August
The last month of the summer, August, is another warm month in Old Mystic, Connecticut, with temperature in the range of an average low of 64.4°F (18°C) and an average high of 79.2°F (26.2°C).Temperature
Old Mystic's weather, upon August's arrival, documents an average high-temperature of a still moderately hot 79.2°F (26.2°C), nearly identical to the prior month. The average nighttime temperature lowers to a refreshing 64.4°F (18°C) throughout August.Humidity
In August, the average relative humidity is 78%.Rainfall
In Old Mystic, in August, during 15.1 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, in Old Mystic, there are 162.1 rainfall days, and 33.66" (855mm) of precipitation is accumulated.Snowfall
In Old Mystic, snow does not fall in June through October.Daylight
In Old Mystic, the average length of the day in August is 13h and 47min.On the first day of August, sunrise is at 5:43 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 7:22 pm EDT.
Sunshine
With an average of 10.4h of sunshine, August has the most sunshine of the year.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In August, a daily maximum UV index of 6 leads to the following instructions:
Shield from overexposure. Defense against sun-related harm is required. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Old Mystic, CT
- Average high temperature in August: 79.2°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in August: 64.4°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in August
Old Mystic, CT
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Old Mystic, CT
- Average wind speed in August: 6.8mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in August
Old Mystic, CT
- Average humidity in August: 78%
The months with the highest relative humidity are June and July (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in August
Old Mystic, CT
- Average rainfall in August: 2.56"
The wettest month (with the highest rainfall) is December (3.78").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in August
Old Mystic, CT
- Average rainfall days in August: 15.1 days
The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is January (10 days).
Average snowfall in August
Old Mystic, CT
- Average snowfall in August: 0"
The month with the highest snowfall is March (2.56").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in August
Old Mystic, CT
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Old Mystic, CT
- Average daylight in August: 13h and 48min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in August: 10h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in August
Old Mystic, CT
- Average sunshine days in August: 12.6 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is July (11.5 days).
Average UV index in August
Old Mystic, CT
- 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
Old Mystic, CT
- Average cloud cover in August: 31
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in August
Old Mystic, CT
- Average visibility in August: 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).
