September weather forecast
Donaldson Mill, AL

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Weather in September

The first month of the autumn, September, is still a warm month in Donaldson Mill, Alabama, with an average temperature ranging between min 64°F (17.8°C) and max 83.7°F (28.7°C).

Temperature

Donaldson Mill's weather in September displays an average high-temperature of a moderately hot 83.7°F (28.7°C), showing minor disparity from August's 88.9°F (31.6°C). Throughout September, an average low-temperature of 64°F (17.8°C) is expected.

Heat index

In September, the average heat index is appraised at a hot 91.4°F (33°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Know that the heat index computations account for shaded terrains and slight winds. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

In September, the average relative humidity is 74%.

Rainfall

In Donaldson Mill, during September, the rain falls for 14 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Donaldson Mill, during the entire year, the rain falls for 174.6 days and collects up to 42.8" (1087mm) of precipitation.

Snowfall

In Donaldson Mill, snow does not fall in April through October.

Daylight

In Donaldson Mill, the average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 6:24 am and sunset at 7:16 pm. On the last day of September, sunrise is at 6:44 am and sunset at 6:35 pm CDT.

Sunshine

The average sunshine in September is 9h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: An average maximum UV index of 5 in September leads to these recommendations:
Guard yourself - Avoiding sunburn is suggested. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.

Frequently asked questions

How hot is September?

In September, in Donaldson Mill, the average high-temperature is 83.7°F (28.7°C), and the average low-temperature is 64°F (17.8°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in September is appraised at 91.4°F (33°C).

What is the average humidity in September?

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

How much does it rain in September?

In Donaldson Mill, in September, during 14 rainfall days, 2.68" (68mm) of precipitation is typically accumulated.

When it does not snow?

April through October are months without snowfall.

What is the average length of the day in September?

The average day length in September is 12h and 22min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:24 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:35 pm CDT.

How many hours of sunshine does Donaldson Mill have in September?

In September, the average sunshine duration is 9h.

How high is the UV index in September?

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
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
Donaldson Mill, AL

Average temperature in September - Donaldson Mill, AL
  • Average high temperature in September: 83.7°F

The warmest month (with the highest average high temperature) is July (89.4°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 (34°F).

Average pressure in September
Donaldson Mill, AL

Average pressure in September - Donaldson Mill, AL
  • 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 (29.97"Hg).

Average wind speed in September
Donaldson Mill, AL

Average wind speed in September - Donaldson Mill, AL
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is February (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in September
Donaldson Mill, AL

Average humidity in September - Donaldson Mill, AL
  • Average humidity in September: 74%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Donaldson Mill, AL

Average rainfall in September - Donaldson Mill, AL
  • Average rainfall in September: 2.68"

The wettest month (with the highest rainfall) is December (4.45").
The driest month (with the least rainfall) is November (2.4").

Average rainfall days in September
Donaldson Mill, AL

Average rainfall days in September - Donaldson Mill, AL
  • Average rainfall days in September: 14 days

The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is November (10.3 days).

Average snowfall in September
Donaldson Mill, AL

Average snowfall in September - Donaldson Mill, AL
  • Average snowfall in September: 0"

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

Average snowfall days in September
Donaldson Mill, AL

Average snowfall days in September - Donaldson Mill, 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
Donaldson Mill, AL

Average daylight in September / Average sunshine in September - Donaldson Mill, 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: 9h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).

Average sunshine days in September
Donaldson Mill, AL

Average sunshine days in September - Donaldson Mill, AL
  • Average sunshine days in September: 13.2 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is August (9.3 days).

Average UV index in September
Donaldson Mill, AL

Average UV index in September - Donaldson Mill, AL
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in September
Donaldson Mill, AL

Average cloud cover in September - Donaldson Mill, AL
  • Average cloud cover in September: 30

The months with the most cloud cover are February and December (Cloud cover 49).
The months with the least cloud cover are June and September (Cloud cover 30).

Average visibility in September
Donaldson Mill, AL

Average visibility in September - Donaldson Mill, AL
  • Average visibility in September: 6mi

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

Donaldson Mill, Alabama, USA

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