September weather forecast and climate
Fairfield, AL

The first month of the autumn, September, is also a moderately hot month in Fairfield, Alabama, with average temperature fluctuating between 66°F (18.9°C) and 85.5°F (29.7°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a moderately hot 85.5°F (29.7°C). The average low-temperature, in Fairfield, is 66°F (18.9°C).

Heat index

In September, the average heat index is calculated to a tropical 94.1°F (34.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, clothing, metabolic differences, and differences in body mass, height, and shape affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Fairfield, the average relative humidity in September is 71%.

Rainfall

In Fairfield, Alabama, in September, it is raining for 14.3 days, with typically 2.44" (62mm) of accumulated precipitation. Throughout the year, there are 172.1 rainfall days, and 39.69" (1008mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine in Fairfield is 8.9h.

UV index

Months with the highest UV index in Fairfield are April through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Fairfield?

The average high-temperature, in September, is 85.5°F (29.7°C), while the average low-temperature is 66°F (18.9°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), that represents influence of the relative humidity to air temperaure, is estimated at 94.1°F (34.5°C).

What is the average humidity in September in Fairfield?

The average relative humidity in September in Fairfield, Alabama, is 71%.

How much does it rain in Fairfield in September?

In Fairfield, Alabama, in September, during 14.3 rainfall days, 2.44" (62mm) of precipitation is typically accumulated.

When it does not snow in Fairfield?

April through October are months without snowfall in Fairfield.

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

In September, the average length of the day is 12.4h.

How long on average sun shines in September in Fairfield?

In September, the average sunshine in Fairfield is 8.9h.

What are the months with the highest UV index in Fairfield?

Months with the highest UV index in Fairfield, Alabama, are April through September, with an average maximum UV index of 6.

What is the UV index intensity in September in Fairfield?

In Fairfield, Alabama, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Fairfield, AL
  • Average high temperature in September: 85.5°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (51.3°F).

  • Average low temperature in September: 66°F

The month with the highest average low temperature is August (71.6°F).
The coldest month (with the lowest average low temperature) is January (36°F).

Average pressure in September - Fairfield, AL
  • Average pressure in September: 30.01"

The month with the highest atmospheric pressure is January (30.17").
Months with the lowest atmospheric pressure are June and August (29.98").

Average wind speed in September - Fairfield, AL
  • Average wind speed in September: 5mph

The windiest months (with the highest average wind speed) are February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September - Fairfield, AL
  • Average humidity in September: 71%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (70%).

Average rainfall in September - Fairfield, AL
  • Average rainfall in September: 2.44"

The wettest month (with the highest rainfall) is December (4.13").
The driest month (with the least rainfall) is October (2.24").

Average rainfall days in September - Fairfield, AL
  • Average rainfall days in September: 14.3 days

The month with the highest number of rainy days is July (21 days).
The month with the least rainy days is November (8.6 days).

Average snowfall in September - Fairfield, AL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.75").
Months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September - Fairfield, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.3 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Fairfield, AL
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 8.9h

Months with the most sunshine are June and July (Average sunshine: 10.5h).
Months with the least sunshine are February and December (Average sunshine: 4.8).

Average sunshine days in September - Fairfield, AL
  • Average sunshine days in September: 13.4 days

The month with the most sunshine days is October (19.7 days).
The month with the least sunshine days is July (8.3 days).

Average UV index in September - Fairfield, AL
  • Average UV index in September: 6

Months with the highest UV index are April, May, June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in September - Fairfield, AL
  • Average cloud cover in September: 30

Months with the most cloud cover are February and December (Cloud cover 48).
Months with the least cloud cover are June, September and October (Cloud cover 30).

Average visibility in September - Fairfield, AL
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).