September weather forecastOktaha, OK
September
Weather in September
September, the first month of the autumn in Oktaha, is also a moderately hot month, with an average temperature varying between 64.2°F (17.9°C) and 84.4°F (29.1°C).Temperature
With September's onset, the weather reveals a slight temperature decrease, transitioning from a tropical 91.2°F (32.9°C) in August to a moderately hot 84.4°F (29.1°C). September nights observe an average temperature dip to a comfortable 64.2°F (17.9°C).Heat index
The heat index in September is evaluated at a hot 91.4°F (33°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Humidity
In Oktaha, the average relative humidity in September is 70%.Rainfall
In Oktaha, in September, it is raining for 11.9 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, there are 135 rainfall days, and 31.61" (803mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Oktaha, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:54 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:06 pm CDT.
Sunshine
In Oktaha, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 5 translates into these guidelines:
Undertake precautions - Guarding against sun damage is counselled. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Oktaha, OK
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (46.9°F).
- Average low temperature in September: 64.2°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (31.8°F).
Average pressure in September
Oktaha, 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
Oktaha, OK
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is March (10mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in September
Oktaha, 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
Oktaha, OK
- Average rainfall in September: 2.64"
The wettest month (with the highest rainfall) is May (4.65").
The driest month (with the least rainfall) is February (1.61").
Average rainfall days in September
Oktaha, OK
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
Oktaha, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Oktaha, 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, September and October (0 days).
Average daylight in September /
Average sunshine in September
Oktaha, OK
- Average daylight in September: 12h and 24min
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 12min
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
Oktaha, OK
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is January (21.2 days).
The month with the least sunshine days is April (13.6 days).
Average UV index in September
Oktaha, 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
Oktaha, OK
- Average cloud cover in September: 27
The months with the most cloud cover are February and March (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Oktaha, 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).
