September weather forecast
Mobile, AL

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Weather in September

September signals the transition from summer to autumn in Mobile, Alabama. Temperatures begin to recede, peaking around 87.3°F (30.7°C). September enjoys long daylight hours, despite the minor drop in temperatures. The rainfall also decreases significantly to an average of 3.46" (88mm) over 18 days. Towards the end of September, the weather becomes even milder, and the months leading into winter, such as October and November, are marked by further reductions in temperature and rain.

Temperature

Mobile registers an average high-temperature of a still hot 87.3°F (30.7°C) at the commencement of September, closely related to the preceding month. Nightly temperatures in Mobile drop to an average low of 72.1°F (22.3°C) in September.

Heat index

In September, the average heat index is computed to be a torrid 100.4°F (38°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. 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 extremely significant for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

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

Rainfall

In Mobile, in September, it is raining for 17.7 days, with typically 3.46" (88mm) of accumulated precipitation. In Mobile, during the entire year, the rain falls for 173.3 days and collects up to 39.33" (999mm) of precipitation.

Snowfall

February through December are months without snowfall.

Daylight

In September, the average length of the day in Mobile is 12h and 20min.
On the first day of the month, sunrise is at 6:29 am and sunset at 7:14 pm. On the last day of September, in Mobile, sunrise is at 6:45 am and sunset at 6:38 pm CDT.

Sunshine

The average sunshine in September in Mobile is 9.7h.

UV index

In September, the average daily maximum UV index in Mobile is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 6 translates into these guidelines:
Guard oneself from overexposure. Defence against sun injury is vital. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

How hot is it in Mobile in September?

In September, in Mobile, the average high-temperature is 87.3°F (30.7°C), and the average low-temperature is 72.1°F (22.3°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is computed to be 100.4°F (38°C).

What is the average humidity in September in Mobile?

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

How much does it rain in Mobile in September?

In Mobile, Alabama, in September, it is raining for 17.7 days, with typically 3.46" (88mm) of accumulated precipitation.

When it does not snow in Mobile?

February through December are months without snowfall in Mobile.

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

The average day length in September is 12h and 20min.

When are sunrise and sunset in September in Mobile?

In September, on the first day of the month, sunrise is at 6:29 am and sunset at 7:14 pm. On the last day of the month, in Mobile, sunrise is at 6:45 am and sunset at 6:38 pm CDT.

How many hours of sunshine does Mobile have in September?

The average sunshine duration in September is 9.7h.

How high is the UV index in September in Mobile?

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to 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
Mobile, AL

Average temperature in September - Mobile, AL
  • Average high temperature in September: 87.3°F

The warmest months (with the highest average high temperature) are July and August (90.9°F).
The month with the lowest average high temperature is January (58.5°F).

  • Average low temperature in September: 72.1°F

The month with the highest average low temperature is August (76.5°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).

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Average pressure in September
Mobile, AL

Average pressure in September - Mobile, AL
  • Average pressure in September: 29.98"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).

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Average wind speed in September
Mobile, AL

Average wind speed in September - Mobile, AL
  • Average wind speed in September: 5.7mph

The windiest months (with the highest average wind speed) are January and April (7.4mph).
The calmest month (with the lowest average wind speed) is July (5.2mph).

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Average humidity in September
Mobile, AL

Average humidity in September - Mobile, 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 (70%).

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Average rainfall in September
Mobile, AL

Average rainfall in September - Mobile, AL
  • Average rainfall in September: 3.46"

The wettest month (with the highest rainfall) is August (5.55").
The driest month (with the least rainfall) is November (2.05").

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Average rainfall days in September
Mobile, AL

Average rainfall days in September - Mobile, AL
  • Average rainfall days in September: 17.7 days

The month with the highest number of rainy days is July (23.9 days).
The month with the least rainy days is November (8.4 days).

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Average snowfall in September
Mobile, AL

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

The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Mobile, AL

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

The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, April, May, June, July, August, September, October and November (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

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Average sunshine days in September
Mobile, AL

Average sunshine days in September - Mobile, AL
  • Average sunshine days in September: 10.7 days

The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (5.4 days).

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Average UV index in September
Mobile, AL

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

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

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Average cloud cover in September
Mobile, AL

Average cloud cover in September - Mobile, AL
  • Average cloud cover in September: 26

The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 24).

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Average visibility in September
Mobile, AL

Average visibility in September - Mobile, 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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Mobile, Alabama, USA

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