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
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a warm 81.9°F (27.7°C) in August to a still moderately hot 75.9°F (24.4°C). An average low-temperature of 55.2°F (12.9°C) is observed during September nights.Humidity
The average relative humidity in September is 78%.Rainfall
In September, the rain falls for 14.5 days. Throughout September, 2.32" (59mm) of precipitation is accumulated. Throughout the year, there are 164.9 rainfall days, and 33.7" (856mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Spottswood, Virginia.Daylight
The average length of the day in September in Spottswood is 12h and 25min.On the first day of September, sunrise is at 6:47 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:00 pm EDT.
Sunshine
In Spottswood, the average sunshine in September is 8.2h.UV index
In Spottswood, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 4 during September leads to these advisories:
Put precautions into practice - Guidance to elude sunburn is provided. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Spottswood?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Spottswood, VA
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in September
Spottswood, VA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Spottswood, VA
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are February and April (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Spottswood, VA
- Average humidity in September: 78%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and July (74%).
Average rainfall in September
Spottswood, VA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is May (3.7").
The driest months (with the least rainfall) are January and November (2.09").
Average rainfall days in September
Spottswood, VA
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in September
Spottswood, VA
- Average snowfall in September: 0"
The month with the highest snowfall is March (4.92").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Spottswood, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Spottswood, 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 36min).
- Average sunshine in September: 8h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Spottswood, VA
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in September
Spottswood, VA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Spottswood, VA
- Average cloud cover in September: 42
The month with the most cloud cover is March (Cloud cover 48).
The months with the least cloud cover are June and July (Cloud cover 34).
Average visibility in September
Spottswood, VA
- Average visibility in September: 5mi
The months with the highest visibility are June, July and November (6mi).
The months with the lowest visibility are January, February, March, April, May, August, September, October and December (5mi).
Spottswood, Virginia, USA
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