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 arrival of September correlates with a minor temperature reduction, down from August's 80.6°F (27°C) to a still moderately hot 74.8°F (23.8°C). Throughout September, the temperature falls to an average low of 54.1°F (12.3°C).Humidity
In September, the average relative humidity in Nallen, West Virginia, is 79%.Rainfall
The month with the least rainfall in Nallen is September, when the rain falls for 14.3 days and typically collects 1.69" (43mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Nallen, West Virginia, is 12h and 25min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:07 pm EDT.
Sunshine
In Nallen, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 in September translates into this advice:
Heed the precautions - Suggestions to avoid sunburn are made. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the average September temperature in Nallen?
What is the average humidity in September in Nallen?
What is the driest month in Nallen?
How much does it rain in Nallen in September?
When it does not snow in Nallen?
Does it snow in Nallen in September?
What is the average length of the day in September in Nallen?
What time are sunrise and sunset in September in Nallen?
How many hours of sunshine does Nallen have in September?
What is the UV index reading in September in Nallen?
Average temperature in September
Nallen, WV
- Average high temperature in September: 74.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in September
Nallen, WV
- 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
Nallen, WV
- Average wind speed in September: 4.5mph
The windiest months (with the highest average wind speed) are January and February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Nallen, WV
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are June, July, August and November (78%).
Average rainfall in September
Nallen, WV
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Nallen, WV
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is May (23.3 days).
The month with the least rainy days is November (12.2 days).
Average snowfall in September
Nallen, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Nallen, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Nallen, WV
- 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 3min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Nallen, WV
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is October (14.6 days).
The month with the least sunshine days is May (6.1 days).
Average UV index in September
Nallen, WV
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Nallen, WV
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Nallen, WV
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Nallen, West Virginia, USA
Weather forecast for your location
2. Allow the app to use your location
