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
With the onset of September, the average high-temperature subtly recedes from August's warm 76.3°F (24.6°C) to an agreeable 69.1°F (20.6°C). In the month of September, Fairfax's average low-temperature falls to a frosty 49.6°F (9.8°C).Humidity
In Fairfax, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 12.7 days. Throughout September, 1.85" (47mm) of precipitation is accumulated. Throughout the year, there are 172.5 rainfall days, and 28.07" (713mm) of precipitation is accumulated.Snowfall
In Fairfax, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:15 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:33 pm EDT.
Sunshine
The average sunshine in September is 9h.UV index
In Fairfax, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Ensure safety - Sun damage prevention is strongly urged. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Fairfax?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Fairfax?
Does it snow in September?
How many hours of daylight does Fairfax have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Fairfax, VT
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in September: 49.6°F
The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in September
Fairfax, VT
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Fairfax, VT
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Fairfax, VT
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in September
Fairfax, VT
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is February (1.73").
Average rainfall days in September
Fairfax, VT
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is January (9 days).
Average snowfall in September
Fairfax, VT
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Fairfax, VT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (20.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Fairfax, VT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 6min).
Average sunshine days in September
Fairfax, VT
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is September (15.2 days).
The month with the least sunshine days is February (6 days).
Average UV index in September
Fairfax, VT
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Fairfax, VT
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 70).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Fairfax, VT
- Average visibility in September: 5mi
The months with the highest visibility are May, July and August (6mi).
The months with the lowest visibility are January, February and March (4mi).
Fairfax, Vermont, USA
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