September weather forecast and climate
Montevallo, AL

Weather in September

The first month of the autumn, September, is also a moderately hot month in Montevallo, Alabama, with average temperature ranging between min 65.7°F (18.7°C) and max 85.5°F (29.7°C).

Temperature

In Montevallo, Alabama, the average high-temperature is essentially the same as in August - a moderately hot 85.5°F (29.7°C). In Montevallo, the average low-temperature is 65.7°F (18.7°C).

Heat index

In September, the average heat index is calculated to a torrid 95°F (35°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like clothing, differences in body mass, height, and shape, metabolic differences, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Montevallo, the average relative humidity in September is 73%.

Rainfall

Months with the least rainfall in Montevallo are September and October Rain falls for 11.9 days and accumulates 1.26" (32mm) of rain.

Snowfall

March through November are months without snowfall in Montevallo.

Daylight

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

Sunshine

In September, the average sunshine is 9h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Montevallo?

The average high-temperature, in September, is 85.5°F (29.7°C), while the average low-temperature is 65.7°F (18.7°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), that takes the relative humidity and factores it into the air temperature reading, in September is appraised at 95°F (35°C).

What is the average humidity in September in Montevallo?

The average relative humidity in September in Montevallo is 73%.

How many days does it rain in September in Montevallo?

In Montevallo, Alabama, in September, it is raining for 11.9 days, with typically 1.26" (32mm) of accumulated precipitation.

What is the driest month in Montevallo?

Months with the least rainfall in Montevallo are September and October Rain falls for 11.9 days and accumulates 1.26" (32mm) of rain.

When it does not snow in Montevallo?

In Montevallo, Alabama, snow does not fall in March through November.

How many hours of daylight does Montevallo have in September?

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

How many hours of sunshine does Montevallo have in September?

The average sunshine in September is 9h.

How high is the UV index in September in Montevallo?

In September, the average daily maximum UV index in Montevallo, Alabama, is 5. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.

Average temperature in September
Montevallo, AL

Average temperature in September - Montevallo, AL
  • Average high temperature in September: 85.5°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (51.4°F).

  • Average low temperature in September: 65.7°F

The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).

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Average pressure in September
Montevallo, AL

Average pressure in September - Montevallo, AL
  • Average pressure in September: 30.01"

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

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Average wind speed in September
Montevallo, AL

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

The windiest months (with the highest average wind speed) are January, February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.4mph).

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Average humidity in September
Montevallo, AL

Average humidity in September - Montevallo, AL
  • Average humidity in September: 73%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in September
Montevallo, AL

Average rainfall in September - Montevallo, AL
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is August (2.52").
The driest months (with the least rainfall) are September and October (1.26").

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Average rainfall days in September
Montevallo, AL

Average rainfall days in September - Montevallo, AL
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is November (6.7 days).

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Average snowfall in September
Montevallo, AL

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

The month with the highest snowfall is December (0.47").
Months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Montevallo, AL

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

The month with the highest number of snowfall days is January (1 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 9h

Months with the most sunshine are June and July (Average sunshine: 10.6h).
Months with the least sunshine are February and December (Average sunshine: 4.9).

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Average sunshine days in September
Montevallo, AL

Average sunshine days in September - Montevallo, AL
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is November (21.9 days).
The month with the least sunshine days is July (9 days).

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Average UV index in September
Montevallo, AL

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

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in September
Montevallo, AL

Average cloud cover in September - Montevallo, AL
  • Average cloud cover in September: 29

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in September
Montevallo, AL

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

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

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