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
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from 82.9°F (28.3°C) in August to a still moderately hot 75.6°F (24.2°C). Throughout September, Sir Johns Run witnesses a consistent average low-temperature of 54.5°F (12.5°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In September, in Sir Johns Run, the rain falls for 13 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. In Sir Johns Run, during the entire year, the rain falls for 158.9 days and collects up to 26.1" (663mm) of precipitation.Snowfall
In Sir Johns Run, snow does not fall in May through October.Daylight
The average length of the day in September in Sir Johns Run is 12h and 26min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:56 pm EDT.
Sunshine
The average sunshine in September in Sir Johns Run is 8.8h.UV index
In September, the average daily maximum UV index in Sir Johns Run is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 4 during September leads to these instructions:
Make use of precautions - It is urged to ward off sun damage. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What are the temperatures in Sir Johns Run in September?
What is the average humidity in September in Sir Johns Run?
How many days does it rain in September in Sir Johns Run?
When it does not snow in Sir Johns Run?
What is the average length of the day in September in Sir Johns Run?
When are sunrise and sunset in September in Sir Johns Run?
How many hours of sunshine does Sir Johns Run have in September?
What is the UV index reading in September in Sir Johns Run?
Average temperature in September
Sir Johns Run, WV
- Average high temperature in September: 75.6°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in September
Sir Johns Run, 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
Sir Johns Run, WV
- Average wind speed in September: 4.6mph
The windiest months (with the highest average wind speed) are January and February (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in September
Sir Johns Run, WV
- Average humidity in September: 78%
The months with the highest relative humidity are February, October and December (79%).
The months with the lowest relative humidity are April and July (74%).
Average rainfall in September
Sir Johns Run, WV
- Average rainfall in September: 1.81"
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
Sir Johns Run, WV
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in September
Sir Johns Run, WV
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.9").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Sir Johns Run, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Sir Johns Run, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Sir Johns Run, WV
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in September
Sir Johns Run, WV
- Average UV index in September: 4
The months with the highest UV index are May, June and 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
Sir Johns Run, WV
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Sir Johns Run, WV
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, June, July and November (6mi).
The months with the lowest visibility are January, May, August, September, October and December (5mi).
Sir Johns Run, West Virginia, USA
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