September weather forecast and climate
Cornwall Furnace, AL

The first month of the autumn, September, is also a moderately hot month in Cornwall Furnace, Alabama, with average temperature ranging between max 82.9°F (28.3°C) and min 62.6°F (17°C).

Temperature

In September, the average high-temperature is practically the same as in August - a moderately hot 82.9°F (28.3°C). The average low-temperature, is 62.6°F (17°C).

Heat index

In September, the average heat index is estimated at a tropical 89.6°F (32°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, differences in body mass, height, and shape, metabolic differences), and activity. 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. 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

The average relative humidity in September is 75%.

Rainfall

In Cornwall Furnace, during 14.2 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. In Cornwall Furnace, during the entire year, the rain falls for 181.2 days and collects up to 41.06" (1043mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in Cornwall Furnace is 12.4h.

Sunshine

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

UV index

The average daily maximum UV index in Cornwall Furnace is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. 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 Cornwall Furnace?

The average high-temperature, in September, in Cornwall Furnace, Alabama, is 82.9°F (28.3°C), while the average low-temperature is 62.6°F (17°C). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines both air temperature and relative humidity, is calculated to 89.6°F (32°C).

What is the average humidity in September in Cornwall Furnace?

The average relative humidity in September in Cornwall Furnace is 75%.

How many days does it rain in September in Cornwall Furnace?

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 in Cornwall Furnace?

April through October are months without snowfall in Cornwall Furnace.

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

The average length of the day in September in Cornwall Furnace is 12.4h.

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

The average sunshine in September in Cornwall Furnace is 8.5h.

What is the UV index reading in September in Cornwall Furnace?

In Cornwall Furnace, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.
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: 30.02"

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 - 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: 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: 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: 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: 0"

The month with the highest snowfall is January (0.79").
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: 0 days

The month with the highest number of snowfall days is February (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 - Cornwall Furnace, 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: 9.9h).

  • Average sunshine in September: 8.5h

Months with the most sunshine are June and July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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: 5

Months with the highest UV index are May, June, July and August (UV index 6).
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: 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: 6mi

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