September weather forecastConcord, NH
September
Weather in September
September ushers in autumn that heralds the end of the warm season in Concord. A notable decrease in average temperature from August's 78.8°F (26°C) symbolizes the incoming fall. September decoration includes changing foliage, with fallen leaves creating a colorful carpet along the city's byways. The transition into cooler days is supported by crisp mornings and noticeably shorter daylight hours. Despite changes, the latter part of the day frequently offers balmy conditions, perfect for afternoon strolls.Temperature
In Concord, the average high-temperature in September gently drops from a warm 78.8°F (26°C) in August to a pleasant 71.4°F (21.9°C). During September, the average low-temperature is a fresh 52°F (11.1°C).Humidity
The average relative humidity in September in Concord is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 10.7 days and accumulates 1.65" (42mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 6:11 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:28 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Concord, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 4 in September transforms into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Concord, NH
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in September
Concord, NH
- Average pressure in September: 30.05"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 September
Concord, NH
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Concord, NH
- Average humidity in September: 78%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Concord, NH
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is October (3.03").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in September
Concord, NH
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in September
Concord, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Concord, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Concord, NH
- Average daylight in September: 12h and 30min
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 0min).
- Average sunshine in September: 8h and 30min
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 24min).
Average sunshine days in September
Concord, NH
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is September (17.4 days).
The month with the least sunshine days is April (13.6 days).
Average UV index in September
Concord, NH
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Concord, NH
- Average cloud cover in September: 37
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Concord, NH
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
