September weather forecast
Maryville, AL

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Weather in September

September, the first month of the autumn in Maryville, is still a warm month, with an average temperature varying between 63.9°F (17.7°C) and 83.8°F (28.8°C).

Temperature

The onset of September brings with it an average high-temperature of a warm 83.8°F (28.8°C), showing a negligible variation from the month before. Maryville experiences an average low-temperature reading of 63.9°F (17.7°C) throughout September.

Heat index

The heat index in September is estimated at a hot 91.4°F (33°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.

Humidity

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

Rainfall

The months with the least rainfall are September and October Rain falls for 13.5 days and accumulates 2.4" (61mm) of rain.

Snowfall

In Maryville, snow does not fall in April through October.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of the month, sunrise is at 6:18 am and sunset at 7:09 pm. On the last day of September, sunrise is at 6:38 am and sunset at 6:29 pm CDT.

Sunshine

The average sunshine in September is 8.6h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 5 in September translates into these instructions:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Updated: Aug 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

The high-temperature during September is 83.8°F (28.8°C) and the low-temperature is 63.9°F (17.7°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is estimated at 91.4°F (33°C).

What is the average humidity in September?

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

What is the driest month?

September and October are months with the least rain when the rain falls for 13.5 days and typically aggregates up to 2.4" (61mm) of rain.

How much does it rain in September?

In Maryville, in September, it is raining for 13.5 days, with typically 2.4" (61mm) of accumulated precipitation.

When it does not snow?

In Maryville, snow does not fall in April through October.

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

The average day length in September is 12h and 22min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:18 am and sunset at 7:09 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:29 pm CDT.

How many hours of sunshine does Maryville have in September?

In Maryville, Alabama, the average sunshine duration in September is 8.6h.

What is the UV index intensity in September in Maryville?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe 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
Maryville, AL

Average temperature in September - Maryville, AL
  • Average high temperature in September: 83.8°F

The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (49.6°F).

  • Average low temperature in September: 63.9°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).

Average pressure in September
Maryville, AL

Average pressure in September - Maryville, 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
Maryville, AL

Average wind speed in September - Maryville, AL
  • Average wind speed in September: 4.7mph

The windiest months (with the highest average wind speed) are January, February and March (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

Average humidity in September
Maryville, AL

Average humidity in September - Maryville, AL
  • Average humidity in September: 74%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (73%).

Average rainfall in September
Maryville, AL

Average rainfall in September - Maryville, AL
  • Average rainfall in September: 2.4"

The wettest month (with the highest rainfall) is December (4.17").
The driest months (with the least rainfall) are September and October (2.4").

Average rainfall days in September
Maryville, AL

Average rainfall days in September - Maryville, AL
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (21.2 days).
The month with the least rainy days is November (9.4 days).

Average snowfall in September
Maryville, AL

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

The month with the highest snowfall is February (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Maryville, AL

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

The month with the highest number of snowfall days is February (1.7 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
Maryville, AL

Average daylight in September / Average sunshine in September - Maryville, 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 4min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in September
Maryville, AL

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

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (7.8 days).

Average UV index in September
Maryville, AL

Average UV index in September - Maryville, 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
Maryville, AL

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

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September
Maryville, AL

Average visibility in September - Maryville, 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).

Maryville, Alabama, USA

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