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
A mild drop in Rock Cave's average high-temperature is observed in September, transitioning from a warm 80.8°F (27.1°C) in August to a still moderately hot 75.2°F (24°C). Rock Cave witnesses an average low-temperature of 54.3°F (12.4°C) throughout the month of September.Humidity
In September, the average relative humidity is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 14.4 days and accumulates 1.89" (48mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:51 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:05 pm EDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index in Rock Cave is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: An average UV index of 4 in September transforms into this advice:
Guard yourself - Avoiding sunburn is suggested. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Rock Cave have in September?
What is the UV index reading in September in Rock Cave?
Average temperature in September
Rock Cave, WV
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in September
Rock Cave, WV
- Average pressure in September: 30.06"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
Rock Cave, WV
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is February (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Rock Cave, WV
- Average humidity in September: 78%
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 (77%).
Average rainfall in September
Rock Cave, WV
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in September
Rock Cave, WV
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is February (11.4 days).
Average snowfall in September
Rock Cave, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (9.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rock Cave, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rock Cave, 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 30min).
- Average sunshine in September: 8h and 4min
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 30min).
Average sunshine days in September
Rock Cave, WV
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is November (13.2 days).
The month with the least sunshine days is February (7.2 days).
Average UV index in September
Rock Cave, WV
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Rock Cave, 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 35).
Average visibility in September
Rock Cave, WV
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is January (4mi).
Rock Cave, West Virginia, USA
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