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
In Keyser, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's 81.1°F (27.3°C) to a still warm 73.8°F (23.2°C). The average low-temperature during September nights is a cool 52.5°F (11.4°C).Humidity
In Keyser, West Virginia, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 13.7 days. Throughout September, 2.05" (52mm) of precipitation is accumulated. In Keyser, West Virginia, during the entire year, the rain falls for 166 days and collects up to 27.44" (697mm) of precipitation.Snowfall
In Keyser, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:59 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In Keyser, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: An average UV index of 3 in September transforms into this advice:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. On days when the sun blazes, arm yourself with sunglasses that block 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 in Keyser?
How much does it rain in September?
When it does not snow?
Does it snow in Keyser in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Keyser have in September?
How high is the UV index in September?
Average temperature in September
Keyser, WV
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in September
Keyser, WV
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Keyser, WV
- Average wind speed in September: 4.6mph
The windiest months (with the highest average wind speed) are January and February (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Keyser, WV
- Average humidity in September: 79%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are April, June and July (75%).
Average rainfall in September
Keyser, WV
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is November (1.69").
Average rainfall days in September
Keyser, WV
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in September
Keyser, WV
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Keyser, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Keyser, WV
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Keyser, WV
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in September
Keyser, WV
- Average UV index in September: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Keyser, WV
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Keyser, WV
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Keyser, West Virginia, USA
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