September weather forecast
Fort Gibson, OK

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Fort Gibson, Oklahoma, with an average temperature ranging between max 84.2°F (29°C) and min 63.7°F (17.6°C).

Temperature

September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's tropical 91°F (32.8°C) to a warm 84.2°F (29°C). Fort Gibson, in the month of September, anticipates a consistent average low-temperature of 63.7°F (17.6°C).

Heat index

September's average heat index is calculated to be a tropical 91.4°F (33°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.

Humidity

The average relative humidity in September is 70%.

Rainfall

In Fort Gibson, in September, during 11.4 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, there are 134.9 rainfall days, and 32.36" (822mm) of precipitation is accumulated.

Snowfall

In Fort Gibson, snow does not fall in May through October.

Daylight

In Fort Gibson, the average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:53 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:05 pm CDT.

Sunshine

The average sunshine in September is 9.2h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

The average high-temperature and low-temperature during September are 84.2°F (29°C) and 63.7°F (17.6°C) respectively. The average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in September is calculated to be 91.4°F (33°C).

What is the average humidity in September in Fort Gibson?

In September, the average relative humidity is 70%.

How much does it rain in September?

In Fort Gibson, in September, it is raining for 11.4 days, with typically 2.8" (71mm) of accumulated precipitation.

When it does not snow?

In Fort Gibson, snow does not fall in May through October.

What is the average length of the day in September?

In Fort Gibson, the average day length in September is 12h and 23min.

When is the sunrise / sunset in September?

On the first day of September in Fort Gibson, sunrise is at 6:53 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:05 pm CDT.

How many hours of sunshine does Fort Gibson have in September?

In Fort Gibson, 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 of 3 to 5 symbolizes a medium health risk 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
Fort Gibson, OK

Average temperature in September - Fort Gibson, OK
  • Average high temperature in September: 84.2°F

The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (46.9°F).

  • Average low temperature in September: 63.7°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

Average pressure in September
Fort Gibson, OK

Average pressure in September - Fort Gibson, OK
  • Average pressure in September: 30"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
Fort Gibson, OK

Average wind speed in September - Fort Gibson, OK
  • Average wind speed in September: 6.8mph

The windiest month (with the highest average wind speed) is March (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

Average humidity in September
Fort Gibson, OK

Average humidity in September - Fort Gibson, OK
  • Average humidity in September: 70%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is August (68%).

Average rainfall in September
Fort Gibson, OK

Average rainfall in September - Fort Gibson, OK
  • Average rainfall in September: 2.8"

The wettest month (with the highest rainfall) is May (4.69").
The driest month (with the least rainfall) is February (1.65").

Average rainfall days in September
Fort Gibson, OK

Average rainfall days in September - Fort Gibson, OK
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.1 days).

Average snowfall in September
Fort Gibson, OK

Average snowfall in September - Fort Gibson, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Fort Gibson, OK

Average snowfall days in September - Fort Gibson, OK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.3 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
Fort Gibson, OK

Average daylight in September / Average sunshine in September - Fort Gibson, OK
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

Average sunshine days in September
Fort Gibson, OK

Average sunshine days in September - Fort Gibson, OK
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is April (13.2 days).

Average UV index in September
Fort Gibson, OK

Average UV index in September - Fort Gibson, OK
  • Average UV index in September: 5

The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in September
Fort Gibson, OK

Average cloud cover in September - Fort Gibson, OK
  • Average cloud cover in September: 27

The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 21).

Average visibility in September
Fort Gibson, OK

Average visibility in September - Fort Gibson, OK
  • 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).

Fort Gibson, Oklahoma, USA

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