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
In Etna, the average high-temperature in September slightly decreases from a tropical 93.4°F (34.1°C) in August to a moderately hot 84.9°F (29.4°C). In September, the temperature drops to an average of 66.2°F (19°C) at night.Heat index
The average heat index in September is calculated to be a hot 89.6°F (32°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Humidity
In September, the average relative humidity is 62%.Rainfall
In Etna, in September, during 13.1 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Etna, Oklahoma, during the entire year, the rain falls for 115 days and collects up to 21.5" (546mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 24min.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 7:25 am and sunset at 7:15 pm CDT.
Sunshine
In Etna, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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 much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Etna have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Etna have in September?
What is the UV index intensity in September?
Average temperature in September
Etna, OK
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is July (95°F).
The month with the lowest average high temperature is January (47.1°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 (29.5°F).
Average pressure in September
Etna, 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 (29.86"Hg).
Average wind speed in September
Etna, OK
- Average wind speed in September: 9.1mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in September
Etna, OK
- Average humidity in September: 62%
The month with the highest relative humidity is May (69%).
The months with the lowest relative humidity are July and August (56%).
Average rainfall in September
Etna, OK
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is December (0.71").
Average rainfall days in September
Etna, OK
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in September
Etna, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Etna, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 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
Etna, 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 42min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are June and July (Average sunshine: 11h and 12min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).
Average sunshine days in September
Etna, OK
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is December (23.9 days).
The month with the least sunshine days is May (14.3 days).
Average UV index in September
Etna, 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
Etna, OK
- Average cloud cover in September: 25
The months with the most cloud cover are March and April (Cloud cover 35).
The months with the least cloud cover are June and August (Cloud cover 19).
Average visibility in September
Etna, 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).
Etna, Oklahoma, USA
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