September weather forecast
Penn, AL

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Penn, Alabama, with temperature in the range of an average low of 64°F (17.8°C) and an average high of 83.3°F (28.5°C).

Temperature

Penn's entry into September measures an average high-temperature of a warm 83.3°F (28.5°C), closely parallel to the preceding month. The low-temperature average for Penn during September stands at an enjoyable 64°F (17.8°C).

Heat index

The heat index for September is evaluated at a hot 89.6°F (32°C). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.
Data suggests that the heat index is set for environments in shade and with a light wind. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', quantifies the warmth felt when relative humidity is considered. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

The average relative humidity in September is 74%.

Rainfall

In Penn, in September, it is raining for 13.7 days, with typically 2.48" (63mm) of accumulated precipitation. Throughout the year, there are 173 rainfall days, and 41.38" (1051mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:22 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:33 pm CDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

In Penn, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, an average UV index of 5 transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Updated: Jun 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in September?

In Penn, 83.3°F (28.5°C) is the average high-temperature and 64°F (17.8°C) is the average low-temperature during September. In September, the average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, is evaluated at 89.6°F (32°C).

What is the average humidity in September?

In Penn, Alabama, the average relative humidity in September is 74%.

How much does it rain in September?

In Penn, during September, the rain falls for 13.7 days and regularly aggregates up to 2.48" (63mm) of precipitation.

When it does not snow?

April through October are months without snowfall.

What is the average length of the day in September?

In September, the average day length is 12h and 23min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:22 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:33 pm CDT.

How many hours of sunshine does Penn have in September?

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

What is the UV index reading in September?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe 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
Penn, AL

Average temperature in September - Penn, AL
  • Average high temperature in September: 83.3°F

The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (48.7°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 (33.6°F).

Average pressure in September
Penn, AL

Average pressure in September - Penn, AL
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in September
Penn, AL

Average wind speed in September - Penn, AL
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is February (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in September
Penn, AL

Average humidity in September - Penn, AL
  • Average humidity in September: 74%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Penn, AL

Average rainfall in September - Penn, AL
  • Average rainfall in September: 2.48"

The wettest month (with the highest rainfall) is December (4.25").
The driest month (with the least rainfall) is November (2.24").

Average rainfall days in September
Penn, AL

Average rainfall days in September - Penn, AL
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (9.7 days).

Average snowfall in September
Penn, AL

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

The month with the highest snowfall is January (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Penn, AL

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

The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in September
Penn, AL

Average sunshine days in September - Penn, AL
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is July (9.3 days).

Average UV index in September
Penn, AL

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

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

Average cloud cover in September
Penn, AL

Average cloud cover in September - Penn, AL
  • Average cloud cover in September: 31

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September
Penn, AL

Average visibility in September - Penn, AL
  • Average visibility in September: 6mi

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

Penn, Alabama, USA

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