September weather forecast and climate
Dunrowin, AL

The first month of the autumn, September, is also a moderately hot month in Dunrowin, Alabama, with temperature in the range of an average low of 64°F (17.8°C) and an average high of 84.6°F (29.2°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a moderately hot 84.6°F (29.2°C). In Dunrowin, Alabama, in September, the average low-temperature is 64°F (17.8°C).

Heat index

In September, the average heat index is evaluated at a tropical 93.2°F (34°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 'apparent temperature', 'feels like', 'real feel', 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 (wind, differences in body mass, height, and shape, pregnancy). 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

The average relative humidity in September is 74%.

Rainfall

In Dunrowin, during September, the rain falls for 14.5 days and regularly aggregates up to 2.64" (67mm) of precipitation. In Dunrowin, during the entire year, the rain falls for 184.1 days and collects up to 41.97" (1066mm) of precipitation.

Snowfall

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

Daylight

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

Sunshine

In September, the average sunshine is 8.7h.

UV index

The average daily maximum UV index in Dunrowin is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 5 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. 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.

What is the temperature in September in Dunrowin?

The average high-temperature, in September, in Dunrowin, is 84.6°F (29.2°C), while the average low-temperature is 64°F (17.8°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines both air temperature and relative humidity, is estimated at 93.2°F (34°C).

What is the average humidity in September in Dunrowin?

The average relative humidity in September in Dunrowin is 74%.

How many days does it rain in September in Dunrowin?

In Dunrowin, Alabama, during September, the rain falls for 14.5 days and regularly aggregates up to 2.64" (67mm) of precipitation.

When it does not snow in Dunrowin?

In Dunrowin snow does not fall in March through November.

How many hours of daylight does Dunrowin have in September?

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

How long on average sun shines in September in Dunrowin?

The average sunshine in September in Dunrowin is 8.7h.

What is the UV index intensity in September in Dunrowin?

In September, the average daily maximum UV index in Dunrowin, Alabama, is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.
Average temperature in September - Dunrowin, AL
  • Average high temperature in September: 84.6°F

The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (50.9°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (35.1°F).

Average pressure in September - Dunrowin, 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").

Average wind speed in September - Dunrowin, AL
  • Average wind speed in September: 4.6mph

The windiest months (with the highest average wind speed) are January and February (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).

Average humidity in September - Dunrowin, 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%).

Average rainfall in September - Dunrowin, AL
  • Average rainfall in September: 2.64"

The wettest month (with the highest rainfall) is August (4.06").
The driest month (with the least rainfall) is October (2.32").

Average rainfall days in September - Dunrowin, AL
  • Average rainfall days in September: 14.5 days

The month with the highest number of rainy days is July (22.4 days).
The month with the least rainy days is November (9.2 days).

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

The month with the highest snowfall is January (0.91").
Months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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

The month with the highest number of snowfall days is February (1.6 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Dunrowin, 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: 10h).

  • Average sunshine in September: 8.7h

Months with the most sunshine are June and July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in September - Dunrowin, AL
  • Average sunshine days in September: 12.9 days

The month with the most sunshine days is October (19 days).
The month with the least sunshine days is July (6.2 days).

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

Months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in September - Dunrowin, AL
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is September (Cloud cover 30).

Average visibility in September - Dunrowin, 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).