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 move into September in Alderson, West Virginia, indicates a slight reduction in the average high-temperature, down from August's 79.9°F (26.6°C) to a still warm 73.4°F (23°C). Alderson registers a consistent average low-temperature of 52°F (11.1°C) during September.Humidity
The average relative humidity in September is 81%.Rainfall
The month with the least rainfall in Alderson is September, when the rain falls for 15.5 days and typically collects 1.81" (46mm) of precipitation.Snowfall
In Alderson, snow does not fall in June through September.Daylight
In Alderson, the average length of the day in September is 12h and 25min.On the first day of September in Alderson, sunrise is at 6:53 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:06 pm EDT.
Sunshine
In September, the average sunshine is 8.1h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 4 in September translates into these instructions:
Undertake protective steps - Preventing sun damage is advised. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What are the temperatures in Alderson in September?
What is the average humidity in September in Alderson?
What is the driest month in Alderson?
How much does it rain in Alderson in September?
When it does not snow in Alderson?
Does it snow in Alderson in September?
How many hours of daylight does Alderson have in September?
When are sunrise and sunset in September in Alderson?
How many hours of sunshine does Alderson have in September?
What is the UV index intensity in September in Alderson?
Average temperature in September
Alderson, WV
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (36.3°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in September
Alderson, 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
Alderson, WV
- Average wind speed in September: 4.4mph
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 (4mph).
Average humidity in September
Alderson, WV
- Average humidity in September: 81%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is June (78%).
Average rainfall in September
Alderson, WV
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Alderson, WV
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is May (22.2 days).
The month with the least rainy days is November (10.2 days).
Average snowfall in September
Alderson, WV
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Alderson, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alderson, WV
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Alderson, WV
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (7.7 days).
Average UV index in September
Alderson, WV
- 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, March, November and December (UV index 2).
Average cloud cover in September
Alderson, WV
- Average cloud cover in September: 45
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in September
Alderson, WV
- Average visibility in September: 4mi
The months with the highest visibility are March, April, June, July, November and December (5mi).
The months with the lowest visibility are January, February, May, August, September and October (4mi).
Alderson, West Virginia, USA
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