Gainesville
Georgia, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Gainesville, GA

The first month of the autumn, September, is still a warm month in Gainesville, Georgia, with average temperature fluctuating between 82.8°F (28.2°C) and 62.6°F (17°C).

Temperature

In September, the average high-temperature is practically the same as in August - a moderately hot 82.8°F (28.2°C). The average low-temperature, in Gainesville, Georgia, is 62.6°F (17°C).

Heat index

In September, the average heat index is calculated to a hot 88.9°F (31.6°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
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 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, differences in body mass, height, and shape, metabolic differences, and pregnancy affect individual temperature impact. 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Gainesville, the average relative humidity is 74%.

Rainfall

In Gainesville, during September, the rain falls for 13.4 days and regularly aggregates up to 2.52" (64mm) of precipitation. In Gainesville, during the entire year, the rain falls for 181.4 days and collects up to 41.93" (1065mm) of precipitation.

Snowfall

April through October are months without snowfall in Gainesville, Georgia.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

In Gainesville, the average sunshine in September is 8.5h.

UV index

In Gainesville, Georgia, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Gainesville?

In September, the average high-temperature is 82.8°F (28.2°C), and the average low-temperature is 62.6°F (17°C). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), that combines relative humidity and air temperature, is calculated to 88.9°F (31.6°C).

What is the average humidity in September in Gainesville?

The average relative humidity in September in Gainesville, Georgia, is 74%.

How many days does it rain in September in Gainesville?

In Gainesville, Georgia, in September, it is raining for 13.4 days, with typically 2.52" (64mm) of accumulated precipitation.

When it does not snow in Gainesville?

April through October are months without snowfall.

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

In September, the average length of the day in Gainesville is 12.4h.

How long on average sun shines in September in Gainesville?

In Gainesville, the average sunshine in September is 8.5h.

How high is the UV index in September in Gainesville?

The average daily maximum UV index in September in Gainesville, Georgia, is 5. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV radiation.
Average temperature in September - Gainesville, GA
  • Average high temperature in September: 82.8°F

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (48.6°F).

  • Average low temperature in September: 62.6°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).

Average humidity in September - Gainesville, GA
  • Average humidity in September: 74%

The month with the highest relative humidity is December (78%).
Months with the lowest relative humidity are July, August, October and November (73%).

Average rainfall in September - Gainesville, GA
  • Average rainfall in September: 2.52"

The wettest month (with the highest rainfall) is December (4.25").
The driest month (with the least rainfall) is October (2.36").

Average rainfall days in September - Gainesville, GA
  • Average rainfall days in September: 13.4 days

The month with the highest number of rainy days is July (20.9 days).
The month with the least rainy days is October (10.1 days).

Average snowfall in September - Gainesville, GA
  • Average snowfall in September: 0"

The month with the highest snowfall is December (1.54").
Months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September - Gainesville, GA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.7 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Gainesville, GA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 8.5h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is December (Average sunshine: 5.2h).

Average UV index in September - Gainesville, GA
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).