September weather forecast and climate
Walnut Grove, AL

Weather in September

September, the first month of the autumn, in Walnut Grove, is still a warm month, with average temperature varying between 82.9°F (28.3°C) and 63.7°F (17.6°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a warm 82.9°F (28.3°C). In September, the average low-temperature is 63.7°F (17.6°C).

Heat index

In September, the average heat index is appraised at a hot 89.6°F (32°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, pregnancy, wind). 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 especially crucial for babies and toddlers. 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 Walnut Grove, Alabama, is 75%.

Rainfall

In Walnut Grove, during 15.5 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. In Walnut Grove, Alabama, during the entire year, the rain falls for 180.2 days and collects up to 42.24" (1073mm) of precipitation.

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 is 8.4h.

UV index

The average daily maximum UV index in Walnut Grove is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for the average 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.
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FAQ

What is the temperature in September in Walnut Grove?

In September, in Walnut Grove, Alabama, the average high-temperature is 82.9°F (28.3°C), and the average low-temperature is 63.7°F (17.6°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that factores the actual air temperature with the relative humidity, is calculated to 89.6°F (32°C).

What is the average humidity in September in Walnut Grove?

In Walnut Grove, the average relative humidity in September is 75%.

How many days does it rain in September in Walnut Grove?

In Walnut Grove, Alabama, in September, it is raining for 15.5 days, with typically 2.8" (71mm) of accumulated precipitation.

When it does not snow in Walnut Grove?

April through October are months without snowfall in Walnut Grove, Alabama.

How many hours of daylight does Walnut Grove have in September?

In Walnut Grove, Alabama, the average length of the day in September is 12.4h.

How many hours of sunshine does Walnut Grove have in September?

The average sunshine in September is 8.4h.

How high is the UV index in September in Walnut Grove?

In September, the average daily maximum UV index in Walnut Grove is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Walnut Grove, AL

Average temperature in September - Walnut Grove, AL
  • Average high temperature in September: 82.9°F

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (49.1°F).

  • Average low temperature in September: 63.7°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (34°F).

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Average pressure in September
Walnut Grove, AL

Average pressure in September - Walnut Grove, 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").

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Average wind speed in September
Walnut Grove, AL

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

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

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Average humidity in September
Walnut Grove, AL

Average humidity in September - Walnut Grove, 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%).

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Average rainfall in September
Walnut Grove, AL

Average rainfall in September - Walnut Grove, AL
  • Average rainfall in September: 2.8"

The wettest month (with the highest rainfall) is August (4.41").
The driest month (with the least rainfall) is October (2.4").

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Average rainfall days in September
Walnut Grove, AL

Average rainfall days in September - Walnut Grove, AL
  • Average rainfall days in September: 15.5 days

The month with the highest number of rainy days is July (22.2 days).
The month with the least rainy days is November (10.1 days).

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Average snowfall in September
Walnut Grove, AL

Average snowfall in September - Walnut Grove, AL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.71").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Walnut Grove, AL

Average snowfall days in September - Walnut Grove, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.2 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Walnut Grove, AL

Average daylight in September / Average sunshine in September - Walnut Grove, 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: 8.4h

The month with the most sunshine is June (Average sunshine: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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Average sunshine days in September
Walnut Grove, AL

Average sunshine days in September - Walnut Grove, AL
  • Average sunshine days in September: 13.1 days

Months with the most sunshine days are October and November (18.5 days).
The month with the least sunshine days is July (7.8 days).

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Average UV index in September
Walnut Grove, AL

Average UV index in September - Walnut Grove, 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).

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Average cloud cover in September
Walnut Grove, AL

Average cloud cover in September - Walnut Grove, AL
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 51).
Months with the least cloud cover are June and September (Cloud cover 32).

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Average visibility in September
Walnut Grove, AL

Average visibility in September - Walnut Grove, AL
  • Average visibility in September: 6mi

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

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