September weather forecastCollier, VA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Collier, Virginia, with an average temperature varying between 74.5°F (23.6°C) and 52.7°F (11.5°C).Temperature
In Collier, entering September brings a subtle temperature decrement, reducing from August's warm 80.2°F (26.8°C) to a still moderately hot 74.5°F (23.6°C). Collier reports a substantial plunge from daytime highs during the nights of September, with an average low-temperature of 52.7°F (11.5°C).Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 16.5 days and accumulates 1.69" (43mm) of precipitation.Snowfall
In Collier, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 24min.On the first day of September in Collier, sunrise is at 6:56 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:09 pm EDT.
Sunshine
In September, the average sunshine in Collier is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Prioritize safety - Suggestions to prevent sun damage are offered. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Collier, VA
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure in September
Collier, 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
Collier, VA
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Collier, VA
- Average humidity in September: 79%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April, June, July and November (77%).
Average rainfall in September
Collier, VA
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Collier, VA
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is November (10.3 days).
Average snowfall in September
Collier, VA
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.22").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Collier, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Collier, VA
- Average daylight in September: 12h and 24min
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 18min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Collier, VA
- Average sunshine days in September: 10.1 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is May (6.8 days).
Average UV index in September
Collier, VA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Collier, VA
- Average cloud cover in September: 42
The month with the most cloud cover is February (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 38).
Average visibility in September
Collier, VA
- Average visibility in September: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (5mi).
The month with the lowest visibility is September (4mi).
