September weather forecast
Johnsons Mill, AL

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Weather in September

September, the first month of the autumn in Johnsons Mill, is still a warm month, with an average temperature ranging between min 63.1°F (17.3°C) and max 83.1°F (28.4°C).

Temperature

The transition into September shows a subtle variation to a warm 83.1°F (28.4°C) from August's 88°F (31.1°C) in the average high-temperature. During September, Johnsons Mill records a consistent average nighttime temperature of 63.1°F (17.3°C).

Heat index

In September, the average heat index is computed to be a tropical 89.6°F (32°C). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.
Data suggests that the heat index is set for environments in shade and with a light wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.

Humidity

In September, the average relative humidity is 75%.

Rainfall

The month with the least rainfall is September, when the rain falls for 13.6 days and typically collects 2.32" (59mm) of precipitation.

Snowfall

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

Daylight

In September, the average length of the day is 12h and 23min.
On the first day of September, sunrise is at 6:19 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:30 pm CDT.

Sunshine

In September, the average sunshine is 8.6h.

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 unsafe exposure to UV radiation for average individuals.
Note: A daily maximum UV index of 5 in September translates into the following instructions:
Act with care - The need to guard against sun damage is communicated. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Updated: Jun 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

In Johnsons Mill, 83.1°F (28.4°C) is the average high-temperature and 63.1°F (17.3°C) is the average low-temperature during September. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in September is computed to be 89.6°F (32°C).

What is the average humidity in September?

The average relative humidity in September is 75%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 13.6 days and typically collects 2.32" (59mm) of precipitation.

How much does it rain in September?

In Johnsons Mill, in September, during 13.6 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

When it does not snow?

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

What is the average length of the day in September?

The average day length in September is 12h and 23min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:19 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:30 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration in Johnsons Mill is 8.6h.

What is the UV index intensity in September?

The average daily maximum UV index in September in Johnsons Mill is 5. A UV Index of 3 to 5 symbolizes a moderate health threat 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
Johnsons Mill, AL

Average temperature in September - Johnsons Mill, AL
  • Average high temperature in September: 83.1°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (48.4°F).

  • Average low temperature in September: 63.1°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 (33.4°F).

Average pressure in September
Johnsons Mill, AL

Average pressure in September - Johnsons Mill, 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
Johnsons Mill, AL

Average wind speed in September - Johnsons Mill, AL
  • Average wind speed in September: 4.9mph

The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September
Johnsons Mill, AL

Average humidity in September - Johnsons Mill, 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 (73%).

Average rainfall in September
Johnsons Mill, AL

Average rainfall in September - Johnsons Mill, AL
  • Average rainfall in September: 2.32"

The wettest month (with the highest rainfall) is April (4.25").
The driest month (with the least rainfall) is September (2.32").

Average rainfall days in September
Johnsons Mill, AL

Average rainfall days in September - Johnsons Mill, AL
  • Average rainfall days in September: 13.6 days

The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is November (9.5 days).

Average snowfall in September
Johnsons Mill, AL

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

The month with the highest snowfall is January (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Johnsons Mill, AL

Average snowfall days in September - Johnsons Mill, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (1.8 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
Johnsons Mill, AL

Average daylight in September / Average sunshine in September - Johnsons 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: 8h and 4min

The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in September
Johnsons Mill, AL

Average sunshine days in September - Johnsons Mill, AL
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (9.6 days).

Average UV index in September
Johnsons Mill, AL

Average UV index in September - Johnsons Mill, 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
Johnsons Mill, AL

Average cloud cover in September - Johnsons Mill, AL
  • Average cloud cover in September: 31

The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are June and September (Cloud cover 31).

Average visibility in September
Johnsons Mill, AL

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

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

Johnsons Mill, Alabama, USA

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