September weather forecastDuvall Manor, MD
September
Weather in September
September, the first month of the autumn in Duvall Manor, is still a warm month, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 58.6°F (14.8°C).Temperature
In Duvall Manor, the average high-temperature in September gently drops from a warm 82.9°F (28.3°C) in August to a still moderately hot 76.5°F (24.7°C). September nights are marked by an average temperature drop to a mild 58.6°F (14.8°C).Humidity
In September, the average relative humidity is 77%.Rainfall
In Duvall Manor, in September, during 14.3 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, there are 158.7 rainfall days, and 30.91" (785mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Duvall Manor, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:38 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm EDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
In Duvall Manor, Maryland, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 during September translates into the following guidance:
Undertake protective steps - Preventing sun damage is advised. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Duvall Manor, MD
- Average high temperature in September: 76.5°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in September
Duvall Manor, MD
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Duvall Manor, MD
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Duvall Manor, MD
- Average humidity in September: 77%
The months with the highest relative humidity are May and October (79%).
The months with the lowest relative humidity are April and July (74%).
Average rainfall in September
Duvall Manor, MD
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is January (1.93").
Average rainfall days in September
Duvall Manor, MD
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Duvall Manor, MD
- Average snowfall in September: 0"
The month with the highest snowfall is March (4.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Duvall Manor, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Duvall Manor, MD
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Duvall Manor, MD
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in September
Duvall Manor, MD
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Duvall Manor, MD
- Average cloud cover in September: 36
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Duvall Manor, MD
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
