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
As September arrives, Big Isaac's weather displays a minor decrease in high-temperatures, transitioning from August's 82.6°F (28.1°C) to a still moderately hot 76.8°F (24.9°C). In Big Isaac, the average nighttime temperature during September is a mild 55.4°F (13°C).Humidity
In September, the average relative humidity is 78%.Rainfall
September is the month with the least rainfall in Big Isaac. Rain falls for 15.1 days and accumulates 2.24" (57mm) of precipitation.Snowfall
In Big Isaac, West Virginia, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 26min.On the first day of September in Big Isaac, sunrise is at 6:51 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:05 pm EDT.
Sunshine
In September, the average sunshine in Big Isaac is 8.6h.UV index
In Big Isaac, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Big Isaac?
What is the average humidity in September in Big Isaac?
What is the driest month in Big Isaac?
How much does it rain in Big Isaac in September?
When it does not snow in Big Isaac?
Does it snow in Big Isaac in September?
How many hours of daylight does Big Isaac have in September?
When is the sunrise / sunset in September in Big Isaac?
How many hours of sunshine does Big Isaac have in September?
How high is the UV index in September in Big Isaac?
Average temperature in September
Big Isaac, WV
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in September
Big Isaac, 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
Big Isaac, WV
- Average wind speed in September: 4.4mph
The windiest months (with the highest average wind speed) are January and February (6.8mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Big Isaac, 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, August and November (77%).
Average rainfall in September
Big Isaac, WV
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Big Isaac, WV
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is May (20.6 days).
The month with the least rainy days is November (11.4 days).
Average snowfall in September
Big Isaac, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Big Isaac, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Big Isaac, 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 30min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Big Isaac, WV
- Average sunshine days in September: 12.4 days
The month with the most sunshine days is November (14.9 days).
The month with the least sunshine days is January (7.4 days).
Average UV index in September
Big Isaac, WV
- Average UV index in September: 4
The months with the highest UV index are May, 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
Big Isaac, WV
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Big Isaac, 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).
Big Isaac, West Virginia, USA
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