September weather forecast and climate
MacMillan, AL

Weather in September

The first month of the autumn, September, is still a hot month in MacMillan, Alabama, with temperature in the range of an average high of 88.3°F (31.3°C) and an average low of 67.5°F (19.7°C).

Temperature

In MacMillan, the average high-temperature in September is practically the same as in August - a still hot 88.3°F (31.3°C). In MacMillan, in September, the average low-temperature is 67.5°F (19.7°C).

Heat index

The average heat index in September is calculated to a torrid 102.9°F (39.4°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', 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 (wind, pregnancy, clothing), 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. 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 September, the average relative humidity in MacMillan, Alabama, is 73%.

Rainfall

In MacMillan, it is raining for 15.7 days, with typically 2.44" (62mm) of accumulated precipitation. Throughout the year, in MacMillan, there are 171.5 rainfall days, and 35.47" (901mm) of precipitation is accumulated.

Snowfall

April through November are months without snowfall in MacMillan.

Daylight

In MacMillan, Alabama, the average length of the day in September is 12.3h.

Sunshine

The average sunshine in September is 8.8h.

UV index

In MacMillan, Alabama, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 MacMillan?

In September, in MacMillan, Alabama, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 67.5°F (19.7°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that takes the relative humidity and factores it into the air temperature reading, in September is calculated to 102.9°F (39.4°C).

What is the average humidity in September in MacMillan?

In September, the average relative humidity is 73%.

How much does it rain in MacMillan in September?

In September, in MacMillan, the rain falls for 15.7 days. Throughout September, 2.44" (62mm) of precipitation is accumulated.

When it does not snow in MacMillan?

In MacMillan snow does not fall in April through November.

What is the average length of the day in September in MacMillan?

In September, the average length of the day in MacMillan is 12.3h.

How long on average sun shines in September in MacMillan?

In MacMillan, Alabama, the average sunshine in September is 8.8h.

What is the UV index intensity in September in MacMillan?

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
MacMillan, AL

Average temperature in September - MacMillan, AL
  • Average high temperature in September: 88.3°F

The warmest month (with the highest average high temperature) is July (93.2°F).
The month with the lowest average high temperature is January (55.9°F).

  • Average low temperature in September: 67.5°F

Months with the highest average low temperature are July and August (72.1°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).

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Average pressure in September
MacMillan, AL

Average pressure in September - MacMillan, AL
  • Average pressure in September: 29.99"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June and August (29.97").

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Average wind speed in September
MacMillan, AL

Average wind speed in September - MacMillan, AL
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is February (6.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

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Average humidity in September
MacMillan, AL

Average humidity in September - MacMillan, 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 (70%).

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Average rainfall in September
MacMillan, AL

Average rainfall in September - MacMillan, AL
  • Average rainfall in September: 2.44"

The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is November (1.93").

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Average rainfall days in September
MacMillan, AL

Average rainfall days in September - MacMillan, AL
  • Average rainfall days in September: 15.7 days

The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is November (8.3 days).

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Average snowfall in September
MacMillan, AL

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

The month with the highest snowfall is March (0.31").
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
MacMillan, AL

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

The month with the highest number of snowfall days is January (0.6 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
MacMillan, AL

Average daylight in September / Average sunshine in September - MacMillan, AL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is June (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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Average sunshine days in September
MacMillan, AL

Average sunshine days in September - MacMillan, AL
  • Average sunshine days in September: 12.7 days

Months with the most sunshine days are October and November (20.5 days).
The month with the least sunshine days is July (6.6 days).

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Average UV index in September
MacMillan, AL

Average UV index in September - MacMillan, AL
  • Average UV index in September: 6

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 3).

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Average cloud cover in September
MacMillan, AL

Average cloud cover in September - MacMillan, AL
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 31).

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Average visibility in September
MacMillan, AL

Average visibility in September - MacMillan, AL
  • Average visibility in September: 5mi

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

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