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 start of September signals a gentle decrease in the average high-temperature, transitioning from a hot 93.7°F (34.3°C) in August to a moderately hot 84.9°F (29.4°C). During September, the average low-temperature is recorded at a comfortable 66°F (18.9°C).Heat index
The heat index in September is computed to be a hot 91.4°F (33°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Understand that the heat index values take into account shaded locations and mild winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Humidity
In September, the average relative humidity is 67%.Rainfall
In September, the rain falls for 13.1 days. Throughout September, 2.8" (71mm) of precipitation is accumulated. In Hennepin, during the entire year, the rain falls for 128.4 days and collects up to 27.09" (688mm) of precipitation.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 September, sunrise is at 7:03 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:14 pm CDT.
Sunshine
The average sunshine in September in Hennepin is 8.3h.UV index
In Hennepin, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 5 in September leads to these guidelines:
Ensure safety - Sun damage prevention is strongly urged. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Hennepin in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Hennepin have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Hennepin have in September?
What is the UV index reading in September?
Average temperature in September
Hennepin, OK
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is August (93.7°F).
The month with the lowest average high temperature is January (50.5°F).
- Average low temperature in September: 66°F
The month with the highest average low temperature is July (72.7°F).
The coldest month (with the lowest average low temperature) is January (33.8°F).
Average pressure in September
Hennepin, OK
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Hennepin, OK
- Average wind speed in September: 7.8mph
The windiest months (with the highest average wind speed) are March and April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in September
Hennepin, OK
- Average humidity in September: 67%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Hennepin, OK
- Average rainfall in September: 2.8"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is January (1.26").
Average rainfall days in September
Hennepin, OK
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (6 days).
Average snowfall in September
Hennepin, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Hennepin, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 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
Hennepin, 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 2min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Hennepin, OK
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is May (14.2 days).
Average UV index in September
Hennepin, 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
Hennepin, OK
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Hennepin, 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).
Hennepin, Oklahoma, USA
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