September weather forecast
Chelsea, AL

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Weather in September

The first month of the autumn, September, is still a warm month in Chelsea, Alabama, with an average temperature varying between 85.1°F (29.5°C) and 66°F (18.9°C).

Temperature

September's onset records an average high-temperature of a warm 85.1°F (29.5°C), a near match to August's 90.1°F (32.3°C). In September, in Chelsea, the average low-temperature is an enjoyable 66°F (18.9°C).

Heat index

The heat index in September is calculated to be a tropical 93.2°F (34°C). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Realize that the values for the heat index are set for shaded places and light winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'real feel', reflects the blend of air temperature and relative humidity to give a temperature impression. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.

Humidity

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

Rainfall

September and October are months with the least rain in Chelsea when the rain falls for 14.3 days and typically aggregates up to 2.36" (60mm) of rain.

Snowfall

April through October are months without snowfall in Chelsea.

Daylight

The average length of the day in September in Chelsea, Alabama, is 12h and 22min.
On the first day of the month, sunrise is at 6:21 am and sunset at 7:11 pm. On the last day of September, sunrise is at 6:40 am and sunset at 6:31 pm CDT.

Sunshine

In September, the average sunshine is 9h.

UV index

In Chelsea, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 in September transforms into the following instructions:
Take necessary precautions - Defending against sun damage is advocated. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Boost your sun resistance with garments that are densely woven yet spacious.
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Frequently asked questions

Is it hot in Chelsea during September?

During September, Chelsea experiences an average high-temperature of 85.1°F (29.5°C) and a low-temperature of 66°F (18.9°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, is calculated to be 93.2°F (34°C).

What is the average humidity in September in Chelsea?

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

What is the driest month in Chelsea?

The months with the least rainfall in Chelsea are September and October Rain falls for 14.3 days and accumulates 2.36" (60mm) of rain.

How many days does it rain in September in Chelsea?

In Chelsea, during September, the rain falls for 14.3 days and regularly aggregates up to 2.36" (60mm) of precipitation.

When it does not snow in Chelsea?

In Chelsea, Alabama, snow does not fall in April through October.

How many hours of daylight does Chelsea have in September?

In Chelsea, Alabama, the average day length in September is 12h and 22min.

What time are sunrise and sunset in September in Chelsea?

In September, on the first day of the month, sunrise is at 6:21 am and sunset at 7:11 pm. On the last day of the month, in Chelsea, Alabama, sunrise is at 6:40 am and sunset at 6:31 pm CDT.

How many hours of sunshine does Chelsea have in September?

In September, the average sunshine duration is 9h.

How high is the UV index in September in Chelsea?

In Chelsea, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from 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
Chelsea, AL

Average temperature in September - Chelsea, AL
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (51.1°F).

  • Average low temperature in September: 66°F

The month with the highest average low temperature is August (71.4°F).
The coldest month (with the lowest average low temperature) is January (36°F).

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Average pressure in September
Chelsea, AL

Average pressure in September - Chelsea, AL
  • Average pressure in September: 30.01"Hg

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

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Average wind speed in September
Chelsea, AL

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

The windiest months (with the highest average wind speed) are February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.4mph).

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Average humidity in September
Chelsea, AL

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

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in September
Chelsea, AL

Average rainfall in September - Chelsea, AL
  • Average rainfall in September: 2.36"

The wettest month (with the highest rainfall) is April (4.09").
The driest months (with the least rainfall) are September and October (2.36").

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Average rainfall days in September
Chelsea, AL

Average rainfall days in September - Chelsea, AL
  • Average rainfall days in September: 14.3 days

The month with the highest number of rainy days is July (21.8 days).
The month with the least rainy days is November (9.3 days).

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Average snowfall in September
Chelsea, AL

Average snowfall in September - Chelsea, 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").

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Average snowfall days in September
Chelsea, AL

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

The month with the highest number of snowfall days is January (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

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Average sunshine days in September
Chelsea, AL

Average sunshine days in September - Chelsea, AL
  • Average sunshine days in September: 13.5 days

The month with the most sunshine days is October (19.7 days).
The month with the least sunshine days is July (7.3 days).

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Average UV index in September
Chelsea, AL

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

The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in September
Chelsea, AL

Average cloud cover in September - Chelsea, AL
  • Average cloud cover in September: 29

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in September
Chelsea, AL

Average visibility in September - Chelsea, 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).

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Chelsea, Alabama, USA

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