August weather forecastDerby, CT
August
Weather in August
August continues the summer trend with high temperatures, although marginally cooler than July. Cloud cover is infrequent, offering ample opportunities for activities under the summer sun. Light drizzles infuse the warm air with a refreshing change. Gradual transitions towards September sees a decrease in temperatures, announcing the imminent arrival of autumn in the city.Temperature
The introduction of August sees an average high-temperature of a still moderately hot 80.2°F (26.8°C), hardly deviating from July. Throughout August, Derby witnesses a nighttime temperature average of 65.5°F (18.6°C).Humidity
In Derby, the average relative humidity in August is 74%.Rainfall
In Derby, in August, during 16.8 rainfall days, 3.03" (77mm) of precipitation is typically accumulated. Throughout the year, in Derby, there are 169.1 rainfall days, and 36.26" (921mm) of precipitation is accumulated.Snowfall
In Derby, snow does not fall in May through October.Daylight
The average length of the day in August is 13h and 47min.On the first day of August in Derby, sunrise is at 5:48 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 7:26 pm EDT.
Sunshine
The months with the most sunshine are July and August, with an average of 10.5h of sunshine.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Deflect overexposure. Sun protection is a necessity. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Derby, CT
- Average high temperature in August: 80.2°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 (34.7°F).
- Average low temperature in August: 65.5°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in August
Derby, CT
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Derby, CT
- Average wind speed in August: 6.2mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in August
Derby, CT
- Average humidity in August: 74%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (72%).
Average rainfall in August
Derby, CT
- Average rainfall in August: 3.03"
The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in August
Derby, CT
- Average rainfall days in August: 16.8 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in August
Derby, CT
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.23").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Derby, CT
- Average snowfall days in August: 0 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, September and October (0 days).
Average daylight in August /
Average sunshine in August
Derby, 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 18min).
- Average sunshine in August: 10h and 30min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in August
Derby, CT
- Average sunshine days in August: 11.4 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in August
Derby, 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
Derby, CT
- Average cloud cover in August: 30
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in August
Derby, 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).
