September weather forecastCollinsville, VA
September
Weather in September
September, the first month of the autumn in Collinsville, is still a warm month, with an average temperature fluctuating between 79.7°F (26.5°C) and 59.4°F (15.2°C).Temperature
September signifies a gentle decline in Collinsville's average high-temperature, easing from a hot 86.7°F (30.4°C) in August to a moderately hot 79.7°F (26.5°C). In September, the temperature drops to an average of 59.4°F (15.2°C) at night.Humidity
In September, the average relative humidity is 75%.Rainfall
September is the month with the least rainfall. Rain falls for 11 days and accumulates 1.14" (29mm) of precipitation.Snowfall
April, June through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 24min.On the first day of the month, sunrise is at 6:51 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:14 am and sunset at 7:04 pm EDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In Collinsville, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Guard yourself - An obligation to protect skin and eyes from harm exists. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Collinsville, VA
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (44.1°F).
- Average low temperature in September: 59.4°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in September
Collinsville, 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 (29.98"Hg).
Average wind speed in September
Collinsville, VA
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Collinsville, VA
- Average humidity in September: 75%
The months with the highest relative humidity are May and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Collinsville, VA
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in September
Collinsville, VA
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is November (7 days).
Average snowfall in September
Collinsville, VA
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.05").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in September
Collinsville, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 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
Collinsville, 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 36min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in September
Collinsville, VA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is July (14.2 days).
Average UV index in September
Collinsville, VA
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Collinsville, VA
- Average cloud cover in September: 36
The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Collinsville, VA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
