Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September brings a small change in high-temperatures, falling from a torrid 95.4°F (35.2°C) in August to a hot 86.2°F (30.1°C). During the month of September, the nighttime temperature in Duke falls to an average of 67.1°F (19.5°C).Heat index
For September, the heat index is calculated to be a tropical 91.4°F (33°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.Factoring in the heat index, values are geared towards shaded areas with light breezes. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
In Duke, the average relative humidity in September is 58%.Rainfall
In Duke, Oklahoma, in September, it is raining for 11.2 days, with typically 2.13" (54mm) of accumulated precipitation. Throughout the year, there are 93.6 rainfall days, and 19.37" (492mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day 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, in Duke, sunrise is at 7:32 am and sunset at 7:23 pm CDT.
Sunshine
In September, the average sunshine in Duke, Oklahoma, is 8.9h.UV index
In Duke, Oklahoma, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 6 in September translates into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
How hot is it in Duke in September?
What is the average humidity in September in Duke?
How many days does it rain in September in Duke?
When it does not snow in Duke?
What is the average length of the day in September in Duke?
When is the sunrise / sunset in September in Duke?
How long on average sun shines in September in Duke?
What is the UV index intensity in September in Duke?
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 2min
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 5min
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).
Duke, Oklahoma, USA
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