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 moderate decline in average high-temperatures is noted in September, moving from a warm 85.5°F (29.7°C) in August to a still moderately hot 78.4°F (25.8°C). Nightly temperatures drop to an average low of 58.6°F (14.8°C) in September.Humidity
The average relative humidity in September in Castleton is 76%.Rainfall
In Castleton, Virginia, in September, it is raining for 12.8 days, with typically 1.69" (43mm) of accumulated precipitation. In Castleton, during the entire year, the rain falls for 144.4 days and collects up to 25.08" (637mm) of precipitation.Snowfall
In Castleton, snow does not fall in June through October.Daylight
The average length of the day in September in Castleton is 12h and 26min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:42 pm. On the last day of September, in Castleton, Virginia, sunrise is at 7:08 am and sunset at 6:56 pm EDT.
Sunshine
In Castleton, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September in Castleton is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Frequently asked questions
What are September temperatures in Castleton?
What is the average humidity in September in Castleton?
How many days does it rain in September in Castleton?
When it does not snow in Castleton?
How many hours of daylight does Castleton have in September?
When is the sunrise / sunset in September in Castleton?
How long on average sun shines in September in Castleton?
What is the UV index intensity in September in Castleton?
Average temperature in September
Castleton, VA
- Average high temperature in September: 78.4°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (41.4°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in September
Castleton, VA
- Average pressure in September: 30.05"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
Castleton, VA
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Castleton, VA
- Average humidity in September: 76%
The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (72%).
Average rainfall in September
Castleton, VA
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.46").
Average rainfall days in September
Castleton, VA
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is May (16.1 days).
The months with the least rainy days are January and November (8.3 days).
Average snowfall in September
Castleton, VA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.36").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Castleton, VA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Castleton, VA
- 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 July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Castleton, VA
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in September
Castleton, VA
- Average UV index in September: 5
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
Castleton, VA
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Castleton, VA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Castleton, Virginia, USA
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