September weather forecast
Gallatin, TN

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Weather in September

September introduces the first whispers of fall in Gallatin, with temperatures beginning to descend from the summer highs. A significant drop in rainfall, down to just 2.48" (63mm) compared to the highs of summer, welcomes the arrival of crisper, dry days. With moderate daylight hours, the city enjoys a balanced rhythm between day and night, lending September its distinct charm. Though temperatures remain warm, the shift in the air hints at the upcoming colorfest of fall foliage. The constant visibility, with an average of 6 miles, allows for uninterrupted visuals of the gradually transitioning landscape.

Temperature

The shift from August to September in Gallatin includes a small decrease in the average high-temperature, from a hot 86°F (30°C) to a moderately hot 80.6°F (27°C). In the month of September, the temperature generally rests at an average low of 61.5°F (16.4°C).

Heat index

In September, the average heat index is computed to be 84.2°F (29°C). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. 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. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially vital to 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 September, the average relative humidity in Gallatin, Tennessee, is 76%.

Rainfall

In Gallatin, in September, it is raining for 14.4 days, with typically 2.48" (63mm) of accumulated precipitation. Throughout the year, in Gallatin, there are 175.7 rainfall days, and 41.65" (1058mm) of precipitation is accumulated.

Snowfall

In Gallatin, snow does not fall in May through October.

Daylight

The average length of the day in September is 12h and 24min.
On the first day of September, sunrise is at 6:17 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:30 pm CDT.

Sunshine

The average sunshine in September in Gallatin is 8.4h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 in September interprets into the following advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Boost your sun resistance with garments that are densely woven yet spacious.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September in Gallatin?

In September, the average high-temperature and low-temperature in Gallatin are 80.6°F (27°C) and 61.5°F (16.4°C) respectively. In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is computed to be 84.2°F (29°C).

What is the average humidity in September in Gallatin?

In Gallatin, Tennessee, the average relative humidity in September is 76%.

How much does it rain in Gallatin in September?

In September, in Gallatin, Tennessee, the rain falls for 14.4 days. Throughout September, 2.48" (63mm) of precipitation is accumulated.

When it does not snow in Gallatin?

In Gallatin, snow does not fall in May through October.

How many hours of daylight does Gallatin have in September?

The average day length in September in Gallatin is 12h and 24min.

What time are sunrise and sunset in September in Gallatin?

In September, on the first day of the month, sunrise is at 6:17 am and sunset at 7:13 pm. On the last day of the month, in Gallatin, Tennessee, sunrise is at 6:40 am and sunset at 6:30 pm CDT.

How long on average sun shines in September in Gallatin?

The average sunshine duration in September in Gallatin is 8.4h.

How high is the UV index in September in Gallatin?

In Gallatin, Tennessee, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to the Sun's 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
Gallatin, TN

Average temperature in September - Gallatin, TN
  • Average high temperature in September: 80.6°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (43.7°F).

  • Average low temperature in September: 61.5°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).

Average pressure in September
Gallatin, TN

Average pressure in September - Gallatin, TN
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

Average wind speed in September
Gallatin, TN

Average wind speed in September - Gallatin, TN
  • Average wind speed in September: 5.1mph

The windiest month (with the highest average wind speed) is February (8.2mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).

Average humidity in September
Gallatin, TN

Average humidity in September - Gallatin, TN
  • Average humidity in September: 76%

The months with the highest relative humidity are March and December (79%).
The month with the lowest relative humidity is October (74%).

Average rainfall in September
Gallatin, TN

Average rainfall in September - Gallatin, TN
  • Average rainfall in September: 2.48"

The wettest month (with the highest rainfall) is July (4.96").
The driest month (with the least rainfall) is November (2.44").

Average rainfall days in September
Gallatin, TN

Average rainfall days in September - Gallatin, TN
  • Average rainfall days in September: 14.4 days

The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is November (10.4 days).

Average snowfall in September
Gallatin, TN

Average snowfall in September - Gallatin, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Gallatin, TN

Average snowfall days in September - Gallatin, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Gallatin, TN

Average daylight in September / Average sunshine in September - Gallatin, TN
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 8h and 2min

The months with the most sunshine are June and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

Average sunshine days in September
Gallatin, TN

Average sunshine days in September - Gallatin, TN
  • Average sunshine days in September: 14.3 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is July (10 days).

Average UV index in September
Gallatin, TN

Average UV index in September - Gallatin, TN
  • 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, February and December (UV index 2).

Average cloud cover in September
Gallatin, TN

Average cloud cover in September - Gallatin, TN
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September
Gallatin, TN

Average visibility in September - Gallatin, TN
  • 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).

Gallatin, Tennessee, USA

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