September weather forecast and climate
Chisholm, AL

The first month of the autumn, September, is also a hot month in Chisholm, Alabama, with average temperature fluctuating between 67.3°F (19.6°C) and 87.1°F (30.6°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a still tropical 87.1°F (30.6°C). In Chisholm, Alabama, in September, the average low-temperature is 67.3°F (19.6°C).

Heat index

The average heat index is appraised at a very hot 98.8°F (37.1°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 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, 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. 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Chisholm, the average relative humidity is 72%.

Rainfall

The month with the least rainfall in Chisholm is September when the rain falls for 12.8 days and typically collects 1.22" (31mm) of precipitation.

Snowfall

April through November are months without snowfall.

Daylight

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

Sunshine

In September, the average sunshine is 8.8h.

UV index

In Chisholm, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 Chisholm?

In Chisholm, Alabama, in September, the average high-temperature is 87.1°F (30.6°C), and the average low-temperature is 67.3°F (19.6°C). In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), that takes the relative humidity and factores it into the air temperature reading, is calculated to 98.8°F (37.1°C).

What is the average humidity in September in Chisholm?

In Chisholm, the average relative humidity in September is 72%.

How much does it rain in Chisholm in September?

In Chisholm, Alabama, in September, it is raining for 12.8 days, with typically 1.22" (31mm) of accumulated precipitation.

What is the driest month in Chisholm?

The month with the least rainfall is September when the rain falls for 12.8 days and typically collects 1.22" (31mm) of precipitation.

When it does not snow in Chisholm?

April through November are months without snowfall.

What is the average length of the day in September in Chisholm?

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

How many hours of sunshine does Chisholm have in September?

In Chisholm, the average sunshine in September is 8.8h.

What is the UV index reading in September in Chisholm?

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to the UV radiation.
Average temperature in September - Chisholm, AL
  • Average high temperature in September: 87.1°F

The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (54.7°F).

  • Average low temperature in September: 67.3°F

Months with the highest average low temperature are July and August (72.1°F).
The coldest month (with the lowest average low temperature) is January (38.5°F).

Average pressure in September - Chisholm, AL
  • Average pressure in September: 30"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.97").

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

The windiest months (with the highest average wind speed) are January, February and December (7.6mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).

Average humidity in September - Chisholm, AL
  • Average humidity in September: 72%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (70%).

Average rainfall in September - Chisholm, AL
  • Average rainfall in September: 1.22"

The wettest months (with the highest rainfall) are August and December (2.36").
The driest month (with the least rainfall) is September (1.22").

Average rainfall days in September - Chisholm, AL
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is August (19.4 days).
The month with the least rainy days is November (6.7 days).

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

Months with the highest snowfall are January and March (0.2").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

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

The month with the highest number of snowfall days is January (0.6 days).
Months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight in September / Average sunshine in September - Chisholm, 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: 10.1h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is June (Average sunshine: 10.8h).
Months with the least sunshine are February and December (Average sunshine: 5.1).

Average sunshine days in September - Chisholm, AL
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is October (21.9 days).
The month with the least sunshine days is July (9 days).

Average UV index in September - Chisholm, AL
  • Average UV index in September: 6

Months with the highest UV index are May, June and July (UV index 7).
Months with the lowest UV index are January and December (UV index 3).

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

The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is October (Cloud cover 29).

Average visibility in September - Chisholm, 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).