September weather forecast
MacMillan, AL

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Weather in September

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

Temperature

The onset of September notes an average high-temperature of a still hot 88.3°F (31.3°C), subtly shifted from August's 92.7°F (33.7°C). MacMillan witnesses a consistent average low-temperature of 67.5°F (19.7°C) throughout September.

Heat index

During September, the heat index is evaluated at a very hot 102.2°F (39°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. 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. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

In September, the average relative humidity is 73%.

Rainfall

In MacMillan, during September, the rain falls for 15.7 days and regularly aggregates up to 2.44" (62mm) of precipitation. Throughout the year, there are 171.5 rainfall days, and 35.47" (901mm) of precipitation is accumulated.

Snowfall

In MacMillan, snow does not fall in April through November.

Daylight

In September, the average length of the day is 12h and 21min.
On the first day of September, sunrise is at 6:25 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:35 pm CDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.

Frequently asked questions

How hot does it get in September?

The average high-temperature, in September, in MacMillan, is 88.3°F (31.3°C), while the average low-temperature is 67.5°F (19.7°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in September is evaluated at 102.2°F (39°C).

What is the average humidity in September?

The average relative humidity in September is 73%.

How much does it rain in September?

In MacMillan, during September, the rain falls for 15.7 days and regularly aggregates up to 2.44" (62mm) of precipitation.

When it does not snow?

In MacMillan, snow does not fall in April through November.

How many hours of daylight does MacMillan have in September?

The average day length in September is 12h and 21min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:25 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:35 pm CDT.

How long on average sun shines in September in MacMillan?

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

What is the UV index intensity in September?

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

The 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).

Average pressure in September
MacMillan, AL

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

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

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).

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%).

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").

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).

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").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - MacMillan, AL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in September
MacMillan, AL

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

The 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).

Average UV index in September
MacMillan, AL

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

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

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).

Average visibility in September
MacMillan, AL

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

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

MacMillan, Alabama, USA

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