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 82.8°F (28.2°C) to a still warm 77.2°F (25.1°C). In September, a remarkable difference from daytime highs is noted, as Stony records an average temperature of 54.5°F (12.5°C) during the night.Humidity
The average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 16.6 days and accumulates 2.01" (51mm) of precipitation.Snowfall
In Stony, Virginia, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 24min.On the first day of September in Stony, sunrise is at 7:01 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:14 pm EDT.
Sunshine
In September, the average sunshine is 8.3h.UV index
In Stony, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 4 in September translates into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Frequently asked questions
What are September temperatures in Stony?
What is the average humidity in September in Stony?
What is the driest month in Stony?
How much does it rain in Stony in September?
When it does not snow in Stony?
Does it snow in Stony in September?
How many hours of daylight does Stony have in September?
When is the sunrise / sunset in September in Stony?
How long on average sun shines in September in Stony?
What is the UV index intensity in September in Stony?
Average temperature in September
Stony, VA
- Average high temperature in September: 77.2°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 (40.5°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in September
Stony, VA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Stony, VA
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Stony, VA
- Average humidity in September: 78%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Stony, VA
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is February (3.86").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Stony, VA
- Average rainfall days in September: 16.6 days
The months with the highest number of rainy days are May and July (21.1 days).
The month with the least rainy days is November (11.6 days).
Average snowfall in September
Stony, VA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.08").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Stony, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Stony, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are June and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in September
Stony, VA
- Average sunshine days in September: 11.5 days
The months with the most sunshine days are October and November (15 days).
The month with the least sunshine days is February (7.7 days).
Average UV index in September
Stony, VA
- Average UV index in September: 4
The months with the highest UV index are June 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
Stony, VA
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Stony, VA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Stony, Virginia, USA
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