September weather forecastPetroleum, WV
September
Weather in September
September, the first month of the autumn in Petroleum, is also a moderately hot month, with an average temperature fluctuating between 77.4°F (25.2°C) and 56.3°F (13.5°C).Temperature
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a moderately hot 83.8°F (28.8°C) to a still warm 77.4°F (25.2°C). Throughout the month of September, Petroleum expects an average low of 56.3°F (13.5°C).Humidity
The average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 14.6 days and accumulates 2.13" (54mm) of precipitation.Snowfall
May through September are months without snowfall in Petroleum.Daylight
In September, the average length of the day in Petroleum is 12h and 26min.On the first day of the month, sunrise is at 6:54 am and sunset at 7:55 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:08 pm EDT.
Sunshine
In Petroleum, the average sunshine in September is 8.3h.UV index
In Petroleum, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Guard yourself - Avoiding sunburn is suggested. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Petroleum, WV
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in September
Petroleum, WV
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Petroleum, WV
- Average wind speed in September: 4.4mph
The windiest months (with the highest average wind speed) are January and February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Petroleum, WV
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are June, July, August and November (77%).
Average rainfall in September
Petroleum, WV
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in September
Petroleum, WV
- Average rainfall days in September: 14.6 days
The month with the highest number of rainy days is May (20.7 days).
The month with the least rainy days is November (12.2 days).
Average snowfall in September
Petroleum, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.87").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Petroleum, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.4 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
Petroleum, WV
- Average daylight in September: 12h and 24min
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 30min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Petroleum, WV
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in September
Petroleum, WV
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Petroleum, WV
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Petroleum, WV
- Average visibility in September: 5mi
The month with the highest visibility is November (6mi).
The month with the lowest visibility is January (4mi).
