September weather forecastFairfield, OK
September
Weather in September
The first month of the autumn, September, is still a warm month in Fairfield, Oklahoma, with an average temperature ranging between min 62.6°F (17°C) and max 82.6°F (28.1°C).Temperature
With the arrival of September, Fairfield notices a mild change in the average high-temperature, sliding from August's hot 89.6°F (32°C) to a warm 82.6°F (28.1°C). September nights observe an average temperature dip to an enjoyable 62.6°F (17°C).Heat index
September's heat index is calculated to be a tropical 87.8°F (31°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Always consider that heat index estimations are for light winds and places in the shade. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Humidity
In September, the average relative humidity in Fairfield is 72%.Rainfall
In September, the rain falls for 12.6 days. Throughout September, 2.76" (70mm) of precipitation is accumulated. Throughout the year, there are 151.2 rainfall days, and 34.76" (883mm) of precipitation is accumulated.Snowfall
In Fairfield, snow does not fall in June through October.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:50 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:03 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Undertake precautions - Obligation exists to protect against skin and eye damage. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fairfield, OK
- Average high temperature in September: 82.6°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (45.9°F).
- Average low temperature in September: 62.6°F
The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in September
Fairfield, OK
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Fairfield, OK
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in September
Fairfield, OK
- Average humidity in September: 72%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Fairfield, OK
- Average rainfall in September: 2.76"
The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is February (1.97").
Average rainfall days in September
Fairfield, OK
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in September
Fairfield, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Fairfield, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 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
Fairfield, OK
- Average daylight in September: 12h and 24min
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 48min).
- Average sunshine in September: 9h and 30min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Fairfield, OK
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in September
Fairfield, OK
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are February and December (UV index 2).
Average cloud cover in September
Fairfield, OK
- Average cloud cover in September: 27
The months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Fairfield, OK
- 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).
