September weather forecast and climate
Erin, AL

September, the first month of the autumn, in Erin, is also a moderately hot month, with temperature in the range of an average low of 64°F (17.8°C) and an average high of 83.8°F (28.8°C).

Temperature

In Erin, Alabama, the average high-temperature is relatively the same as in August - a warm 83.8°F (28.8°C). In September, the average low-temperature is 64°F (17.8°C).

Heat index

In September, the average heat index is appraised at a tropical 91.8°F (33.2°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 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, metabolic differences, pregnancy, and wind affect individual temperature impact. 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 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 Erin, the average relative humidity in September is 75%.

Rainfall

In Erin, Alabama, during September, the rain falls for 14.7 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, in Erin, there are 184.6 rainfall days, and 42.6" (1082mm) of precipitation is accumulated.

Snowfall

April through November are months without snowfall in Erin.

Daylight

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

Sunshine

In Erin, the average sunshine in September is 8.5h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
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.

What is the temperature in September in Erin?

In Erin, Alabama, in September, the average high-temperature is 83.8°F (28.8°C), and the average low-temperature is 64°F (17.8°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that factores the actual air temperature with the relative humidity, in September is appraised at 91.8°F (33.2°C).

What is the average humidity in September in Erin?

The average relative humidity in September in Erin is 75%.

How many days does it rain in September in Erin?

In Erin, in September, during 14.7 rainfall days, 3.03" (77mm) of precipitation is typically accumulated.

When it does not snow in Erin?

April through November are months without snowfall in Erin, Alabama.

How many hours of daylight does Erin have in September?

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

How long on average sun shines in September in Erin?

In September, the average sunshine in Erin, Alabama, is 8.5h.

What is the UV index intensity in September in Erin?

In Erin, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Erin, AL
  • Average high temperature in September: 83.8°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 (50.7°F).

  • Average low temperature in September: 64°F

Months with the highest average low temperature are July and August (69.4°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

Average pressure in September - Erin, 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 - Erin, AL
  • Average wind speed in September: 4.9mph

The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).

Average humidity in September - Erin, AL
  • Average humidity in September: 75%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (73%).

Average rainfall in September - Erin, AL
  • Average rainfall in September: 3.03"

The wettest month (with the highest rainfall) is August (4.37").
The driest month (with the least rainfall) is October (2.09").

Average rainfall days in September - Erin, AL
  • Average rainfall days in September: 14.7 days

The month with the highest number of rainy days is July (24 days).
The month with the least rainy days is November (8.3 days).

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

The month with the highest snowfall is December (0.67").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

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

The month with the highest number of snowfall days is January (1.4 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 - Erin, 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

The month with the most sunshine is June (Average sunshine: 10.5h).
Months with the least sunshine are February and December (Average sunshine: 4.9).

Average sunshine days in September - Erin, AL
  • Average sunshine days in September: 13.2 days

Months with the most sunshine days are October and November (19.7 days).
The month with the least sunshine days is July (5.6 days).

Average UV index in September - Erin, 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).

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

Months with the most cloud cover are February and December (Cloud cover 47).
Months with the least cloud cover are June and October (Cloud cover 31).

Average visibility in September - Erin, 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).