September weather forecast and climate
Rock Mills, AL

Weather in September

September, the first month of the autumn, in Rock Mills, is still a warm month, with average temperature ranging between min 64.6°F (18.1°C) and max 84.2°F (29°C).

Temperature

In September, the average high-temperature is almost the same as in August - a moderately hot 84.2°F (29°C). In September, the average low-temperature is 64.6°F (18.1°C).

Heat index

In September, the average heat index is calculated to a tropical 92.3°F (33.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, wind, pregnancy), and activity. 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. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Rock Mills, the average relative humidity is 74%.

Rainfall

In Rock Mills, in September, during 14.1 rainfall days, 2.36" (60mm) of precipitation is typically accumulated. Throughout the year, there are 181.7 rainfall days, and 39.06" (992mm) of precipitation is accumulated.

Snowfall

April through November are months without snowfall.

Daylight

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

Sunshine

The average sunshine in Rock Mills is 8.5h.

UV index

In September, the average daily maximum UV index in Rock Mills is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Rock Mills?

The average high-temperature, in September, is 84.2°F (29°C), while the average low-temperature is 64.6°F (18.1°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that represents influence of the relative humidity to air temperaure, is evaluated at 92.3°F (33.5°C).

What is the average humidity in September in Rock Mills?

The average relative humidity in September in Rock Mills is 74%.

How many days does it rain in September in Rock Mills?

In Rock Mills, Alabama, during September, the rain falls for 14.1 days and regularly aggregates up to 2.36" (60mm) of precipitation.

When it does not snow in Rock Mills?

In Rock Mills snow does not fall in April through November.

How many hours of daylight does Rock Mills have in September?

In September, the average length of the day in Rock Mills, Alabama, is 12.4h.

How many hours of sunshine does Rock Mills have in September?

In Rock Mills, the average sunshine in September is 8.5h.

What is the UV index intensity in September in Rock Mills?

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

Average temperature in September
Rock Mills, AL

Average temperature in September - Rock Mills, AL
  • Average high temperature in September: 84.2°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (52°F).

  • Average low temperature in September: 64.6°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).

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Average pressure in September
Rock Mills, AL

Average pressure in September - Rock Mills, AL
  • Average pressure in September: 30.01"

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
Rock Mills, AL

Average wind speed in September - Rock Mills, AL
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.4mph).

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Average humidity in September
Rock Mills, AL

Average humidity in September - Rock Mills, 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%).

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Average rainfall in September
Rock Mills, AL

Average rainfall in September - Rock Mills, AL
  • Average rainfall in September: 2.36"

The wettest month (with the highest rainfall) is August (4.06").
The driest month (with the least rainfall) is October (1.93").

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Average rainfall days in September
Rock Mills, AL

Average rainfall days in September - Rock Mills, AL
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is July (22.7 days).
The month with the least rainy days is November (8.5 days).

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Average snowfall in September
Rock Mills, AL

Average snowfall in September - Rock Mills, AL
  • Average snowfall in September: 0"

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

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Average snowfall days in September
Rock Mills, AL

Average snowfall days in September - Rock Mills, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (1.3 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
Rock Mills, AL

Average daylight in September / Average sunshine in September - Rock Mills, 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: 8.5h

Months with the most sunshine are June and July (Average sunshine: 10.5h).
Months with the least sunshine are February and December (Average sunshine: 5).

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Average sunshine days in September
Rock Mills, AL

Average sunshine days in September - Rock Mills, AL
  • Average sunshine days in September: 13.8 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (7.5 days).

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Average UV index in September
Rock Mills, AL

Average UV index in September - Rock Mills, 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, February, November and December (UV index 3).

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Average cloud cover in September
Rock Mills, AL

Average cloud cover in September - Rock Mills, AL
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 31).

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Average visibility in September
Rock Mills, AL

Average visibility in September - Rock Mills, AL
  • Average visibility in September: 6mi

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

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