September weather forecast
Hartselle, AL

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Weather in September

September, the first month of the autumn in Hartselle, is also a moderately hot month, with an average temperature fluctuating between 64°F (17.8°C) and 83.3°F (28.5°C).

Temperature

As September unfolds, the average high-temperature reaches a moderately hot 83.3°F (28.5°C), hinting at a slight fluctuation from the previous month. Hartselle throughout September, experiences an average nighttime temperature of 64°F (17.8°C).

Heat index

For most parts of September, the heat index is computed to be a tropical 89.6°F (32°C). With extended exposure and activity, one might feel exhausted and experience heat cramps.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.

Humidity

In Hartselle, the average relative humidity in September is 74%.

Rainfall

In Hartselle, during September, the rain falls for 13.7 days and regularly aggregates up to 2.48" (63mm) of precipitation. In Hartselle, during the entire year, the rain falls for 173 days and collects up to 41.38" (1051mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Hartselle, the average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:21 am and sunset at 7:13 pm. On the last day of September, sunrise is at 6:42 am and sunset at 6:32 pm CDT.

Sunshine

In Hartselle, the average sunshine in September is 8.8h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A typical high UV index of 5 in September suggests the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Updated: Jul 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

In September, the average high-temperature and low-temperature are 83.3°F (28.5°C) and 64°F (17.8°C) respectively. In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, is computed to be 89.6°F (32°C).

What is the average humidity in September?

In Hartselle, the average relative humidity in September is 74%.

How many days does it rain in September?

In September, the rain falls for 13.7 days. Throughout September, 2.48" (63mm) of precipitation is accumulated.

When it does not snow?

In Hartselle, snow does not fall in April through October.

How many hours of daylight does Hartselle have in September?

In September, the average day length is 12h and 23min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:21 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:32 pm CDT.

How many hours of sunshine does Hartselle have in September?

In Hartselle, the average sunshine duration in September is 8.8h.

How high is the UV index in September?

In Hartselle, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Hartselle, AL

Average temperature in September - Hartselle, AL
  • Average high temperature in September: 83.3°F

The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (48.7°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).

Average pressure in September
Hartselle, AL

Average pressure in September - Hartselle, AL
  • Average pressure in September: 30.02"Hg

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

Average wind speed in September
Hartselle, AL

Average wind speed in September - Hartselle, AL
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is February (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in September
Hartselle, AL

Average humidity in September - Hartselle, AL
  • Average humidity in September: 74%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Hartselle, AL

Average rainfall in September - Hartselle, AL
  • Average rainfall in September: 2.48"

The wettest month (with the highest rainfall) is December (4.25").
The driest month (with the least rainfall) is November (2.24").

Average rainfall days in September
Hartselle, AL

Average rainfall days in September - Hartselle, AL
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (9.7 days).

Average snowfall in September
Hartselle, AL

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

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

Average snowfall days in September
Hartselle, AL

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

The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Hartselle, AL

Average daylight in September / Average sunshine in September - Hartselle, AL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in September
Hartselle, AL

Average sunshine days in September - Hartselle, AL
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is July (9.3 days).

Average UV index in September
Hartselle, AL

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

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 and December (UV index 2).

Average cloud cover in September
Hartselle, AL

Average cloud cover in September - Hartselle, AL
  • Average cloud cover in September: 31

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September
Hartselle, AL

Average visibility in September - Hartselle, AL
  • 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).

Hartselle, Alabama, USA

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