Fairfax
Georgia, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Fairfax, GA

September, the first month of the autumn, in Fairfax, is still a tropical month, with average temperature varying between 69.8°F (21°C) and 86.4°F (30.2°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still hot 86.4°F (30.2°C). In Fairfax, Georgia, the average low-temperature is 69.8°F (21°C).

Heat index

In September, the average heat index is estimated at a very hot 99.3°F (37.4°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like differences in body mass, height, and shape, pregnancy, wind, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Fairfax, the average relative humidity is 77%.

Rainfall

In Fairfax, it is raining for 12.9 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, there are 139 rainfall days, and 15.12" (384mm) of precipitation is accumulated.

Daylight

The average length of the day in Fairfax, Georgia, is 12.3h.

Sunshine

The average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index in Fairfax, Georgia, is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 in September interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Fairfax?

In September, in Fairfax, the average high-temperature is 86.4°F (30.2°C), and the average low-temperature is 69.8°F (21°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), that calculates temperature value influenced by the moisture in the air, is calculated to 99.3°F (37.4°C).

What is the average humidity in September in Fairfax?

In September, the average relative humidity in Fairfax is 77%.

How much does it rain in Fairfax in September?

In September, the rain falls for 12.9 days. Throughout September, 1.1" (28mm) of precipitation is accumulated.

What is the average length of the day in September in Fairfax?

In September, the average length of the day in Fairfax, Georgia, is 12.3h.

How long on average sun shines in September in Fairfax?

The average sunshine in September is 8.6h.

How high is the UV index in September in Fairfax?

The average daily maximum UV index in September in Fairfax is 6. A UV Index of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV radiation.
Average temperature in September - Fairfax, GA
  • Average high temperature in September: 86.4°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (59.5°F).

  • Average low temperature in September: 69.8°F

The month with the highest average low temperature is August (74.1°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).

Average humidity in September - Fairfax, GA
  • Average humidity in September: 77%

The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is January (71%).

Average rainfall in September - Fairfax, GA
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is August (2.4").
The driest month (with the least rainfall) is January (0.55").

Average rainfall days in September - Fairfax, GA
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is August (18.7 days).
The month with the least rainy days is November (6.2 days).

Average daylight in September / Average sunshine in September - Fairfax, GA
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 5.6h).

Average UV index in September - Fairfax, GA
  • Average UV index in September: 6

Months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).