September weather forecast
Cornwall Furnace, AL

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Weather in September

September, the first month of the autumn in Cornwall Furnace, is still a warm month, with temperature in the range of an average low of 62.6°F (17°C) and an average high of 82.9°F (28.3°C).

Temperature

The advent of September signifies a minor shift to an average high-temperature of a moderately hot 82.9°F (28.3°C), aligning closely with August. In the month of September, Cornwall Furnace's average low-temperature falls to an enjoyable 62.6°F (17°C).

Heat index

For most parts of September, the heat index 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.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.

Humidity

In Cornwall Furnace, the average relative humidity in September is 75%.

Rainfall

In Cornwall Furnace, in September, it is raining for 14.2 days, with typically 2.72" (69mm) of accumulated precipitation. Throughout the year, there are 181.2 rainfall days, and 41.06" (1043mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In Cornwall Furnace, the average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:16 am and sunset at 7:07 pm. On the last day of September, sunrise is at 6:36 am and sunset at 6:27 pm CDT.

Sunshine

In September, the average sunshine is 8.5h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

In Cornwall Furnace, in September, the average high-temperature is 82.9°F (28.3°C), and the average low-temperature is 62.6°F (17°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, in September is evaluated at 89.6°F (32°C).

What is the average humidity in September?

In September, the average relative humidity is 75%.

How many days does it rain in September?

In Cornwall Furnace, in September, it is raining for 14.2 days, with typically 2.72" (69mm) of accumulated precipitation.

When it does not snow?

April through October are months without snowfall.

How many hours of daylight does Cornwall Furnace have in September?

The average day length in September is 12h and 23min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:16 am and sunset at 7:07 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 6:27 pm CDT.

How many hours of sunshine does Cornwall Furnace have in September?

The average sunshine duration in September is 8.5h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
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
Cornwall Furnace, AL

Average temperature in September - Cornwall Furnace, AL
  • Average high temperature in September: 82.9°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (48.9°F).

  • Average low temperature in September: 62.6°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).

Average pressure in September
Cornwall Furnace, AL

Average pressure in September - Cornwall Furnace, 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
Cornwall Furnace, AL

Average wind speed in September - Cornwall Furnace, AL
  • Average wind speed in September: 4.5mph

The windiest month (with the highest average wind speed) is February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity in September
Cornwall Furnace, AL

Average humidity in September - Cornwall Furnace, 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 (74%).

Average rainfall in September
Cornwall Furnace, AL

Average rainfall in September - Cornwall Furnace, AL
  • Average rainfall in September: 2.72"

The wettest months (with the highest rainfall) are February and December (4.06").
The driest month (with the least rainfall) is October (2.56").

Average rainfall days in September
Cornwall Furnace, AL

Average rainfall days in September - Cornwall Furnace, AL
  • Average rainfall days in September: 14.2 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is November (9.8 days).

Average snowfall in September
Cornwall Furnace, AL

Average snowfall in September - Cornwall Furnace, 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
Cornwall Furnace, AL

Average snowfall days in September - Cornwall Furnace, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.4 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
Cornwall Furnace, AL

Average daylight in September / Average sunshine in September - Cornwall Furnace, 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 3min

The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Cornwall Furnace, AL

Average sunshine days in September - Cornwall Furnace, AL
  • Average sunshine days in September: 13.4 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is July (8 days).

Average UV index in September
Cornwall Furnace, AL

Average UV index in September - Cornwall Furnace, 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
Cornwall Furnace, AL

Average cloud cover in September - Cornwall Furnace, AL
  • Average cloud cover in September: 31

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

Average visibility in September
Cornwall Furnace, AL

Average visibility in September - Cornwall Furnace, AL
  • Average visibility in September: 6mi

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

Cornwall Furnace, Alabama, USA

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