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
In the transition to September, Fairfax observes a minor drop in the average high-temperature, shifting from 83.8°F (28.8°C) in August to a still warm 77.9°F (25.5°C). During the month of September, an average low-temperature of 58.6°F (14.8°C) is recorded in Fairfax, Ohio.Humidity
August through October, with an average relative humidity of 74%, are the least humid months in Fairfax.Rainfall
The month with the least rainfall in Fairfax is September, when the rain falls for 12.1 days and typically collects 1.54" (39mm) of precipitation.Snowfall
In Fairfax, snow does not fall in May through October.Daylight
In Fairfax, the average length of the day in September is 12h and 26min.On the first day of September in Fairfax, Ohio, sunrise is at 7:06 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:21 pm EDT.
Sunshine
In September, the average sunshine is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Direct Sun exposure should be minimized especially during midday when radiation is most intense. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
What are September temperatures in Fairfax?
What is the least humid month in Fairfax?
What is the average humidity in September in Fairfax?
What is the driest month in Fairfax?
How many days does it rain in September in Fairfax?
When it does not snow in Fairfax?
What is the average length of the day in September in Fairfax?
What time are sunrise and sunset in September in Fairfax?
How long on average sun shines in September in Fairfax?
How high is the UV index in September in Fairfax?
Average temperature in September
Fairfax, OH
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average pressure in September
Fairfax, OH
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Fairfax, OH
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Fairfax, OH
- Average humidity in September: 74%
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are August, September and October (74%).
Average rainfall in September
Fairfax, OH
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is May (3.27").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in September
Fairfax, OH
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in September
Fairfax, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.01").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Fairfax, OH
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (5.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Fairfax, OH
- 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 30min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Fairfax, OH
- Average sunshine days in September: 16.2 days
The months with the most sunshine days are October and November (19.2 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in September
Fairfax, OH
- Average UV index in September: 4
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
Fairfax, OH
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Fairfax, OH
- 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).
Fairfax, Ohio, USA
Weather forecast for your location
2. Allow the app to use your location
