September weather forecast and climate
Bristow, AL

The first month of the autumn, September, is also a moderately hot month in Bristow, Alabama, with average temperature varying between 62.4°F (16.9°C) and 82.2°F (27.9°C).

Temperature

In Bristow, Alabama, the average high-temperature in September is practically the same as in August - a moderately hot 82.2°F (27.9°C). In September, the average low-temperature is 62.4°F (16.9°C).

Heat index

In September, the average heat index is calculated to a tropical 88°F (31.1°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, clothing, differences in body mass, height, and shape). 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. 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 September, the average relative humidity in Bristow is 75%.

Rainfall

In September, in Bristow, Alabama, the rain falls for 14.7 days. Throughout September, 2.68" (68mm) of precipitation is accumulated. In Bristow, during the entire year, the rain falls for 184 days and collects up to 43.54" (1106mm) of precipitation.

Snowfall

In Bristow snow does not fall in April through October.

Daylight

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

Sunshine

The average sunshine in September is 8.6h.

UV index

In Bristow, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Bristow?

The average high-temperature, in September, is 82.2°F (27.9°C), while the average low-temperature is 62.4°F (16.9°C). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), that combines both air temperature and relative humidity, is calculated to 88°F (31.1°C).

What is the average humidity in September in Bristow?

The average relative humidity in September in Bristow is 75%.

How many days does it rain in September in Bristow?

In Bristow, Alabama, during September, the rain falls for 14.7 days and regularly aggregates up to 2.68" (68mm) of precipitation.

When it does not snow in Bristow?

In Bristow, Alabama, snow does not fall in April through October.

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

The average length of the day in September is 12.4h.

How long on average sun shines in September in Bristow?

In September, the average sunshine is 8.6h.

How high is the UV index in September in Bristow?

In Bristow, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Bristow, AL
  • Average high temperature in September: 82.2°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (48.7°F).

  • Average low temperature in September: 62.4°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).

Average pressure in September - Bristow, AL
  • Average pressure in September: 30.02"

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

Average wind speed in September - Bristow, AL
  • Average wind speed in September: 4.7mph

The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).

Average humidity in September - Bristow, AL
  • Average humidity in September: 75%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (74%).

Average rainfall in September - Bristow, AL
  • Average rainfall in September: 2.68"

The wettest months (with the highest rainfall) are February and December (4.49").
The driest month (with the least rainfall) is October (2.64").

Average rainfall days in September - Bristow, AL
  • Average rainfall days in September: 14.7 days

The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is November (10.1 days).

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

The month with the highest snowfall is February (0.79").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is February (1.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in September - Bristow, AL
  • Average sunshine days in September: 13.3 days

The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is July (7.3 days).

Average UV index in September - Bristow, AL
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

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

The month with the most cloud cover is February (Cloud cover 49).
Months with the least cloud cover are June and September (Cloud cover 30).

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

Months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February and December (5mi).