September weather forecastDuke, OK
September
Weather in September
September, the first month of the autumn in Duke, is still a tropical month, with an average temperature ranging between min 67.1°F (19.5°C) and max 86.2°F (30.1°C).Temperature
As September begins, there is a decrease in the average high-temperature, falling from a very hot 95.4°F (35.2°C) in August to a tropical 86.2°F (30.1°C). During the month of September, Duke experiences a steady low-temperature average of 67.1°F (19.5°C).Heat index
September's mean heat index is evaluated at a tropical 91.4°F (33°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.Heat index data is primarily for areas with shade and subjected to light winds. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Humidity
The average relative humidity in September is 58%.Rainfall
In September, the rain falls for 11.2 days. Throughout September, 2.13" (54mm) of precipitation is accumulated. Throughout the year, there are 93.6 rainfall days, and 19.37" (492mm) of precipitation is accumulated.Snowfall
In Duke, snow does not fall in May through October.Daylight
In Duke, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:11 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:32 am and sunset at 7:23 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
The average daily maximum UV index in September in Duke is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 6 during September leads to these instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Duke, OK
- Average high temperature in September: 86.2°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (51.1°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (75.7°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).
Average pressure in September
Duke, OK
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Duke, OK
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is April (12.7mph).
The calmest month (with the lowest average wind speed) is August (9.2mph).
Average humidity in September
Duke, OK
- Average humidity in September: 58%
The months with the highest relative humidity are May and December (60%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Duke, OK
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is April (2.95").
The driest months (with the least rainfall) are January, February, November and December (0.75").
Average rainfall days in September
Duke, OK
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is May (11.6 days).
The month with the least rainy days is January (3.1 days).
Average snowfall in September
Duke, OK
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Duke, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Duke, OK
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 54min
The months with the most sunshine are June and July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in September
Duke, OK
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is January (26.2 days).
The month with the least sunshine days is September (16.2 days).
Average UV index in September
Duke, OK
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Duke, OK
- Average cloud cover in September: 24
The months with the most cloud cover are March and April (Cloud cover 29).
The months with the least cloud cover are June and August (Cloud cover 17).
Average visibility in September
Duke, 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).
