Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September sees a slight reduction in average high-temperature, with a shift from a moderately hot 82.9°F (28.3°C) in August to a still warm 75.9°F (24.4°C). In Graves Mill, September nights witness a steady temperature drop to a mild 55.6°F (13.1°C).Humidity
The months with the highest humidity are May, September, October and December, with an average relative humidity of 78%.Rainfall
September is the month with the least rainfall. Rain falls for 4.6 days and accumulates 0.16" (4mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:42 pm. On the last day of September, in Graves Mill, sunrise is at 7:09 am and sunset at 6:57 pm EDT.
Sunshine
In Graves Mill, the average sunshine in September is 8.4h.UV index
In Graves Mill, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Take necessary precautions - Defending against sun damage is advocated. To guard against the harmful effects of the Sun, minimize exposure during midday. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the most humid month?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow in Graves Mill?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Graves Mill have in September?
What is the UV index reading in September?
Average temperature in September
Graves Mill, VA
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (39.2°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in September
Graves Mill, VA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Graves Mill, VA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in September
Graves Mill, VA
- Average humidity in September: 78%
The months with the highest relative humidity are May, September, October and December (78%).
The months with the lowest relative humidity are January and July (74%).
Average rainfall in September
Graves Mill, VA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is August (0.71").
The driest month (with the least rainfall) is September (0.16").
Average rainfall days in September
Graves Mill, VA
- Average rainfall days in September: 4.6 days
The month with the highest number of rainy days is April (7.3 days).
The months with the least rainy days are January and November (3.8 days).
Average snowfall in September
Graves Mill, VA
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.51").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Graves Mill, VA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Graves Mill, VA
- Average daylight in September: 12h and 2min
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: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Graves Mill, VA
- Average sunshine days in September: 23.6 days
The month with the most sunshine days is October (25.4 days).
The months with the least sunshine days are April, May and August (21.5 days).
Average UV index in September
Graves Mill, VA
- 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
Graves Mill, VA
- Average cloud cover in September: 41
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Graves Mill, VA
- Average visibility in September: 4mi
The months with the highest visibility are July and November (6mi).
The month with the lowest visibility is September (4mi).
Graves Mill, Virginia, USA
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