September weather forecast
Butler, OK

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Weather in September

September, the first month of the autumn in Butler, is also a moderately hot month, with an average temperature varying between 65.5°F (18.6°C) and 84.6°F (29.2°C).

Temperature

In Butler, the beginning of September is marked by a lowered average high-temperature, shifting from August's hot 94.1°F (34.5°C) to a warm 84.6°F (29.2°C). An average nighttime temperature of 65.5°F (18.6°C) is witnessed in Butler throughout September.

Heat index

The heat index for September is computed to be a hot 87.8°F (31°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.
The metrics for the heat index are tailored for both shady environments and light winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.

Humidity

In Butler, the average relative humidity in September is 59%.

Rainfall

In Butler, in September, it is raining for 11.6 days, with typically 2.05" (52mm) of accumulated precipitation. In Butler, during the entire year, the rain falls for 98.4 days and collects up to 18.78" (477mm) of precipitation.

Snowfall

In Butler, snow does not fall in May through September.

Daylight

In Butler, the average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 7:09 am and sunset at 8:03 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:21 pm CDT.

Sunshine

In Butler, the average sunshine in September is 8.9h.

UV index

In Butler, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, a regular UV index of 5 translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. To protect against the Sun's most potent rays, avoid direct exposure around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
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Frequently asked questions

Is it hot in Butler during September?

In September, in Butler, the average high-temperature is 84.6°F (29.2°C), and the average low-temperature is 65.5°F (18.6°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 87.8°F (31°C).

What is the average humidity in September in Butler?

The average relative humidity in September is 59%.

How much does it rain in Butler in September?

In September, in Butler, the rain falls for 11.6 days. Throughout September, 2.05" (52mm) of precipitation is accumulated.

When it does not snow in Butler?

In Butler, Oklahoma, snow does not fall in May through September.

Does it snow in Butler in September?

In Butler, Oklahoma, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Butler have in September?

In Butler, the average day length in September is 12h and 23min.

When are sunrise and sunset in September in Butler?

On the first day of September in Butler, sunrise is at 7:09 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:21 pm CDT.

How long on average sun shines in September in Butler?

The average sunshine duration in September in Butler, Oklahoma, is 8.9h.

What is the UV index reading in September in Butler?

In Butler, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
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
Butler, OK

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

The warmest month (with the highest average high temperature) is July (94.8°F).
The month with the lowest average high temperature is December (49.3°F).

  • Average low temperature in September: 65.5°F

The month with the highest average low temperature is July (73.8°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

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Average pressure in September
Butler, OK

Average pressure in September - Butler, 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).

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Average wind speed in September
Butler, OK

Average wind speed in September - Butler, OK
  • Average wind speed in September: 9.9mph

The windiest month (with the highest average wind speed) is April (13.1mph).
The calmest month (with the lowest average wind speed) is August (9.4mph).

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Average humidity in September
Butler, OK

Average humidity in September - Butler, OK
  • Average humidity in September: 59%

The month with the highest relative humidity is May (62%).
The month with the lowest relative humidity is August (51%).

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Average rainfall in September
Butler, OK

Average rainfall in September - Butler, OK
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is May (3.11").
The driest months (with the least rainfall) are January and February (0.67").

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Average rainfall days in September
Butler, OK

Average rainfall days in September - Butler, OK
  • Average rainfall days in September: 11.6 days

The month with the highest number of rainy days is May (12.1 days).
The month with the least rainy days is January (2.9 days).

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Average snowfall in September
Butler, OK

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

The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Butler, OK

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

The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Butler, OK
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 8h and 5min

The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).

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Average sunshine days in September
Butler, OK

Average sunshine days in September - Butler, OK
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is January (26.4 days).
The month with the least sunshine days is August (15.1 days).

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Average UV index in September
Butler, OK

Average UV index in September - Butler, 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
Butler, OK

Average cloud cover in September - Butler, OK
  • Average cloud cover in September: 24

The months with the most cloud cover are March and April (Cloud cover 30).
The month with the least cloud cover is August (Cloud cover 17).

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Average visibility in September
Butler, OK

Average visibility in September - Butler, 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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Butler, Oklahoma, USA

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