August weather forecastManchester, NH
August
Weather in August
August continues July's heat, but the decreasing daylight announces the imminent arrival of autumn. The month is typically defined by 1.1" (28mm) of rainfall. The decrease in wind speed at 5.1mph (8.2km/h) adds to the still, warm atmosphere. As the days shorten, anticipation builds for the brilliant fall colors that define New England's landscapes.Temperature
In the transition from July to August, Manchester reports an average high-temperature of a still moderately hot 80.1°F (26.7°C), indicating a close resemblance to the prior month. August's nights observe an average temperature of 59.9°F (15.5°C).Humidity
In Manchester, the average relative humidity in August is 75%.Rainfall
In August, the rain falls for 10.4 days. Throughout August, 1.1" (28mm) of precipitation is accumulated. In Manchester, during the entire year, the rain falls for 104.4 days and collects up to 12.95" (329mm) of precipitation.Snowfall
In Manchester, snow does not fall in June through September.Daylight
In August, the average length of the day is 13h and 53min.On the first day of the month, sunrise is at 5:37 am and sunset at 8:06 pm. On the last day of August, sunrise is at 6:09 am and sunset at 7:21 pm EDT.
Sunshine
With an average of 10.4h of sunshine, August has the most sunshine of the year.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In August, the maximum UV index of 6 suggests these recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Manchester, NH
- Average high temperature in August: 80.1°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in August: 59.9°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in August
Manchester, NH
- 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
Manchester, NH
- Average wind speed in August: 5.1mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in August
Manchester, NH
- Average humidity in August: 75%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall in August
Manchester, NH
- Average rainfall in August: 1.1"
The wettest month (with the highest rainfall) is October (1.38").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in August
Manchester, NH
- Average rainfall days in August: 10.4 days
The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in August
Manchester, NH
- Average snowfall in August: 0"
The month with the highest snowfall is December (2.99").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Manchester, NH
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Manchester, NH
- 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 24min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in August
Manchester, NH
- Average sunshine days in August: 18 days
The months with the most sunshine days are January and December (21.3 days).
The month with the least sunshine days is June (16.7 days).
Average UV index in August
Manchester, NH
- 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
Manchester, NH
- Average cloud cover in August: 33
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in August
Manchester, NH
- Average visibility in August: 5mi
The months with the highest visibility are January, April, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August, September and October (5mi).
