September weather forecast
Sulphur, OK

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Weather in September

September proposes a recess from the summer blaze as temperatures initiate their downward journey. With rainfall touching 2.83in, the first whispers of fall become audible amidst the nightly breeze. This month sets the ball rolling for the season of mellow fruitfulness. Locals often assert that a walk through the Travertine Nature Center in September frames the most scenic postcards.

Temperature

In Sulphur, the average high-temperature in September slightly decreases from a hot 93.4°F (34.1°C) in August to a moderately hot 84.6°F (29.2°C). During September, Sulphur sees a mean low-temperature of 66°F (18.9°C).

Heat index

Throughout September, the heat index is estimated at a tropical 91.4°F (33°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

In Sulphur, the average relative humidity in September is 68%.

Rainfall

In Sulphur, Oklahoma, during September, the rain falls for 13.2 days and regularly aggregates up to 2.83" (72mm) of precipitation. In Sulphur, Oklahoma, during the entire year, the rain falls for 129 days and collects up to 27.91" (709mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In September, the average length of the day in Sulphur, Oklahoma, is 12h and 23min.
On the first day of the month, sunrise is at 7:01 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:12 pm CDT.

Sunshine

The average sunshine in September is 8.2h.

UV index

The average daily maximum UV index in September in Sulphur is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: During September, 5 as the daily maximum UV index converts into the following advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
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Frequently asked questions

How hot is September in Sulphur?

The average high-temperature, in September, in Sulphur, is 84.6°F (29.2°C), while the average low-temperature is 66°F (18.9°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in September is estimated at 91.4°F (33°C).

What is the average humidity in September in Sulphur?

In September, the average relative humidity is 68%.

How many days does it rain in September in Sulphur?

In Sulphur, in September, it is raining for 13.2 days, with typically 2.83" (72mm) of accumulated precipitation.

When it does not snow in Sulphur?

In Sulphur, snow does not fall in May through October.

How many hours of daylight does Sulphur have in September?

The average day length in September in Sulphur, Oklahoma, is 12h and 23min.

When is the sunrise / sunset in September in Sulphur?

On the first day of September, sunrise is at 7:01 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:12 pm CDT.

How long on average sun shines in September in Sulphur?

In Sulphur, the average sunshine duration in September is 8.2h.

What is the UV index intensity in September in Sulphur?

The average daily maximum UV index in September in Sulphur is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Sulphur, OK

Average temperature in September - Sulphur, OK
  • Average high temperature in September: 84.6°F

The warmest month (with the highest average high temperature) is August (93.4°F).
The month with the lowest average high temperature is January (50.2°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 (33.4°F).

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Average pressure in September
Sulphur, OK

Average pressure in September - Sulphur, 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 (29.89"Hg).

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Average wind speed in September
Sulphur, OK

Average wind speed in September - Sulphur, OK
  • Average wind speed in September: 7.7mph

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).

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Average humidity in September
Sulphur, OK

Average humidity in September - Sulphur, OK
  • Average humidity in September: 68%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (61%).

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Average rainfall in September
Sulphur, OK

Average rainfall in September - Sulphur, OK
  • Average rainfall in September: 2.83"

The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is January (1.34").

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Average rainfall days in September
Sulphur, OK

Average rainfall days in September - Sulphur, OK
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is January (6.3 days).

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Average snowfall in September
Sulphur, OK

Average snowfall in September - Sulphur, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.3").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Sulphur, OK

Average snowfall days in September - Sulphur, OK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Sulphur, OK

Average daylight in September / Average sunshine in September - Sulphur, 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 1min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in September
Sulphur, OK

Average sunshine days in September - Sulphur, OK
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is January (22.9 days).
The month with the least sunshine days is May (14.3 days).

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Average UV index in September
Sulphur, OK

Average UV index in September - Sulphur, 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).

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Average cloud cover in September
Sulphur, OK

Average cloud cover in September - Sulphur, OK
  • Average cloud cover in September: 30

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 21).

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Average visibility in September
Sulphur, OK

Average visibility in September - Sulphur, 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).

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Sulphur, Oklahoma, USA

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