September weather forecastValliant, MD
September
Weather in September
September, the first month of the autumn in Valliant, is also a moderately hot month, with an average temperature fluctuating between 64°F (17.8°C) and 76.6°F (24.8°C).Temperature
With the commencement of September, Valliant records a moderate temperature decline, with the average high easing from August's 82.9°F (28.3°C) to a still moderately hot 76.6°F (24.8°C). Valliant reports an average low-temperature of 64°F (17.8°C) during the nights of September.Humidity
In Valliant, the average relative humidity in September is 77%.Rainfall
In Valliant, in September, during 14.4 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. In Valliant, during the entire year, the rain falls for 157.2 days and collects up to 33.27" (845mm) of precipitation.Snowfall
In Valliant, snow does not fall in May through October.Daylight
The average length of the day in September in Valliant is 12h and 26min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:35 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:49 pm EDT.
Sunshine
In September, the average sunshine in Valliant is 9.4h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: An average UV index of 5 in September transforms into this advice:
Prioritize safety - Recommendations to avert sunburn are shared. It's recommended to limit sun exposure when its radiation is at its peak during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Valliant, MD
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (40.5°F).
- Average low temperature in September: 64°F
The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in September
Valliant, MD
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Valliant, MD
- Average wind speed in September: 7.8mph
The windiest months (with the highest average wind speed) are February and March (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Valliant, MD
- Average humidity in September: 77%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).
Average rainfall in September
Valliant, MD
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is January (1.93").
Average rainfall days in September
Valliant, MD
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is May (17.2 days).
The months with the least rainy days are January and November (8.8 days).
Average snowfall in September
Valliant, MD
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.22").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Valliant, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Valliant, MD
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in September
Valliant, MD
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is November (19.7 days).
The months with the least sunshine days are May and August (11.8 days).
Average UV index in September
Valliant, MD
- Average UV index in September: 5
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 and December (UV index 2).
Average cloud cover in September
Valliant, MD
- Average cloud cover in September: 33
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Valliant, MD
- Average visibility in September: 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).
