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 heralds a minor drop in average high-temperature, sliding from August's moderately hot 82.4°F (28°C) to a still warm 76.5°F (24.7°C). The temperature dips to an average of 67.1°F (19.5°C) during September nights.Humidity
In Horntown, Virginia, the average relative humidity in September is 77%.Rainfall
In September, in Horntown, the rain falls for 11.2 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. In Horntown, during the entire year, the rain falls for 128 days and collects up to 16.1" (409mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Horntown, Virginia, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:32 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:45 pm EDT.
Sunshine
In September, the average sunshine in Horntown is 9.3h.UV index
In Horntown, Virginia, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Horntown in September?
What is the average humidity in September in Horntown?
How many days does it rain in September in Horntown?
When it does not snow in Horntown?
What is the average length of the day in September in Horntown?
When is the sunrise / sunset in September in Horntown?
How long on average sun shines in September in Horntown?
How high is the UV index in September in Horntown?
Average temperature in September
Horntown, VA
- Average high temperature in September: 76.5°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (43.5°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).
Average pressure in September
Horntown, VA
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Horntown, VA
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is August (7.9mph).
Average humidity in September
Horntown, VA
- Average humidity in September: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (73%).
Average rainfall in September
Horntown, VA
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is July (1.97").
The driest month (with the least rainfall) is May (1.06").
Average rainfall days in September
Horntown, VA
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is November (7.9 days).
Average snowfall in September
Horntown, VA
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Horntown, VA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Horntown, 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 36min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Horntown, VA
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is July (14.7 days).
Average UV index in September
Horntown, 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 and December (UV index 2).
Average cloud cover in September
Horntown, VA
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Horntown, VA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Horntown, Virginia, USA
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