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
September sees a slight reduction in average high-temperature, with a shift from a hot 93.9°F (34.4°C) in August to a warm 85.3°F (29.6°C). The average temperature during September nights dips to a refreshing 66.2°F (19°C).Heat index
The heat index value during September is appraised at a tropical 89.6°F (32°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. 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 of high significance for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Humidity
The average relative humidity in September is 62%.Rainfall
In Hennessey, in September, during 11.6 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. In Hennessey, during the entire year, the rain falls for 107 days and collects up to 20.75" (527mm) of precipitation.Snowfall
April through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 7:03 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:16 pm CDT.
Sunshine
In Hennessey, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Hennessey is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. To guard against the harmful effects of the Sun, minimize exposure during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow in Hennessey?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Hennessey, OK
- Average high temperature in September: 85.3°F
The warmest month (with the highest average high temperature) is July (95.4°F).
The month with the lowest average high temperature is January (48°F).
- Average low temperature in September: 66.2°F
The month with the highest average low temperature is July (74.8°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).
Average pressure in September
Hennessey, OK
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Hennessey, OK
- Average wind speed in September: 9mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).
Average humidity in September
Hennessey, OK
- Average humidity in September: 62%
The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Hennessey, OK
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is December (0.71").
Average rainfall days in September
Hennessey, OK
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (13 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in September
Hennessey, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Hennessey, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 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
Hennessey, OK
- 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 48min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are June and July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in September
Hennessey, OK
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is April (15.8 days).
Average UV index in September
Hennessey, OK
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Hennessey, OK
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is June (Cloud cover 18).
Average visibility in September
Hennessey, 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).
Hennessey, Oklahoma, USA
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