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
Dorter Mill records an average high-temperature of a still warm 79.5°F (26.4°C) in September, maintaining a close correlation with August's 84.6°F (29.2°C). With a significant temperature contrast, nighttime temperatures hover around an average low of 56.3°F (13.5°C) in September.Humidity
The months with the lowest humidity are June through September and November, with an average relative humidity of 75%.Rainfall
The month with the least rainfall is September, when the rain falls for 14 days and typically collects 1.57" (40mm) of precipitation.Snowfall
In Dorter Mill, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 24min.On the first day of the month, sunrise is at 7:01 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:25 am and sunset at 7:14 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In Dorter Mill, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What are the least humid months in Dorter Mill?
What is the average humidity in September in Dorter Mill?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Dorter Mill have in September?
How high is the UV index in September?
Average temperature in September
Dorter Mill, VA
- Average high temperature in September: 79.5°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure in September
Dorter Mill, VA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Dorter Mill, VA
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in September
Dorter Mill, VA
- Average humidity in September: 75%
The months with the highest relative humidity are February and December (79%).
The months with the lowest relative humidity are June, July, August, September and November (75%).
Average rainfall in September
Dorter Mill, VA
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is February (3.82").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Dorter Mill, VA
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is November (11.6 days).
Average snowfall in September
Dorter Mill, VA
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Dorter Mill, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dorter Mill, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Dorter Mill, VA
- Average sunshine days in September: 13.2 days
The months with the most sunshine days are October and November (16.3 days).
The month with the least sunshine days is February (9.1 days).
Average UV index in September
Dorter 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 and December (UV index 2).
Average cloud cover in September
Dorter Mill, VA
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Dorter Mill, VA
- Average visibility in September: 6mi
The months with the highest visibility are April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, May and December (5mi).
Dorter Mill, Virginia, USA
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