September weather forecast
Gainesville, MO

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Gainesville, Missouri, with an average temperature ranging between max 82.4°F (28°C) and min 60.3°F (15.7°C).

Temperature

September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's hot 89.8°F (32.1°C) to a warm 82.4°F (28°C). Gainesville endures a clear shift from daytime heat to a mean low-temperature of 60.3°F (15.7°C) during September nights.

Heat index

Throughout September, the heat index is calculated to be a tropical 87.8°F (31°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant 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 Gainesville, the average relative humidity in September is 74%.

Rainfall

The month with the least rainfall in Gainesville is September, when the rain falls for 10.8 days and typically collects 1.73" (44mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Gainesville, the average length of the day in September is 12h and 24min.
On the first day of the month, sunrise is at 6:41 am and sunset at 7:37 pm. On the last day of September, in Gainesville, sunrise is at 7:04 am and sunset at 6:54 pm CDT.

Sunshine

In September, the average sunshine is 9.2h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: In September, a daily UV index of 5 turns into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Updated: Jul 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

An average high-temperature, in September, in Gainesville, is 82.4°F (28°C) and the average low-temperature is 60.3°F (15.7°C). 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 calculated to be 87.8°F (31°C).

What is the average humidity in September in Gainesville?

In September, the average relative humidity is 74%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 10.8 days and typically collects 1.73" (44mm) of precipitation.

How many days does it rain in September?

In September, in Gainesville, the rain falls for 10.8 days. Throughout September, 1.73" (44mm) of precipitation is accumulated.

When it does not snow?

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

How many hours of daylight does Gainesville have in September?

In Gainesville, the average day length in September is 12h and 24min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:41 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:54 pm CDT.

How long on average sun shines in September?

The average sunshine duration in September is 9.2h.

What is the UV index reading in September?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Gainesville, MO

Average temperature in September - Gainesville, MO
  • Average high temperature in September: 82.4°F

The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (44.2°F).

  • Average low temperature in September: 60.3°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 (28.2°F).

Average pressure in September
Gainesville, MO

Average pressure in September - Gainesville, MO
  • 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 (29.93"Hg).

Average wind speed in September
Gainesville, MO

Average wind speed in September - Gainesville, MO
  • Average wind speed in September: 4.7mph

The windiest months (with the highest average wind speed) are January, February, March and April (7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in September
Gainesville, MO

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

The month with the highest relative humidity is March (79%).
The months with the lowest relative humidity are July, August and October (73%).

Average rainfall in September
Gainesville, MO

Average rainfall in September - Gainesville, MO
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is September (1.73").

Average rainfall days in September
Gainesville, MO

Average rainfall days in September - Gainesville, MO
  • Average rainfall days in September: 10.8 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (7.6 days).

Average snowfall in September
Gainesville, MO

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

The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Gainesville, MO

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

The month with the highest number of snowfall days is January (4.4 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
Gainesville, MO

Average daylight in September / Average sunshine in September - Gainesville, MO
  • 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: 9h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 5h and 6min).

Average sunshine days in September
Gainesville, MO

Average sunshine days in September - Gainesville, MO
  • Average sunshine days in September: 16.5 days

The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is May (12.7 days).

Average UV index in September
Gainesville, MO

Average UV index in September - Gainesville, MO
  • 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
Gainesville, MO

Average cloud cover in September - Gainesville, MO
  • Average cloud cover in September: 32

The month with the most cloud cover is March (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 30).

Average visibility in September
Gainesville, MO

Average visibility in September - Gainesville, MO
  • Average visibility in September: 5mi

The months with the highest visibility are January, February, March, October, November and December (6mi).
The months with the lowest visibility are April, May, June, July, August and September (5mi).

Gainesville, Missouri, USA

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