September weather forecast
Bison, OK

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Bison, Oklahoma, with temperature in the range of an average high of 84.9°F (29.4°C) and an average low of 66.2°F (19°C).

Temperature

September brings a slight decrease in temperature, down from a hot 93.4°F (34.1°C) in August to a moderately hot 84.9°F (29.4°C). An average low-temperature of 66.2°F (19°C) is observed during September nights in Bison.

Heat index

Throughout September, the heat index is evaluated at a tropical 89.6°F (32°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a single figure representing how weather conditions feel when combining temperature and humidity. 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. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.

Humidity

In Bison, Oklahoma, the average relative humidity in September is 62%.

Rainfall

In Bison, Oklahoma, in September, it is raining for 13.1 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, there are 115 rainfall days, and 21.5" (546mm) of precipitation is accumulated.

Snowfall

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

Daylight

The average length of the day in September in Bison is 12h and 24min.
On the first day of September in Bison, Oklahoma, 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 Bison, the average sunshine in September is 8.9h.

UV index

The average daily maximum UV index in September in Bison is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 5 suggests these recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
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Frequently asked questions

How hot is September in Bison?

In September, in Bison, the average high-temperature is 84.9°F (29.4°C), and the average low-temperature is 66.2°F (19°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is evaluated at 89.6°F (32°C).

What is the average humidity in September in Bison?

In September, the average relative humidity in Bison is 62%.

How many days does it rain in September in Bison?

In Bison, Oklahoma, during September, the rain falls for 13.1 days and regularly aggregates up to 2.24" (57mm) of precipitation.

When it does not snow in Bison?

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

Does it snow in Bison in September?

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

What is the average length of the day in September in Bison?

The average day length in September in Bison is 12h and 24min.

When is the sunrise / sunset in September in Bison?

In September, on the first day of the month, sunrise is at 7:03 am and sunset at 7:58 pm. On the last day of the month, in Bison, Oklahoma, sunrise is at 7:26 am and sunset at 7:16 pm CDT.

How long on average sun shines in September in Bison?

The average sunshine duration in September in Bison is 8.9h.

What is the UV index reading in September in Bison?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Bison, OK

Average temperature in September - Bison, 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).

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Average pressure in September
Bison, OK

Average pressure in September - Bison, 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).

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Average wind speed in September
Bison, OK

Average wind speed in September - Bison, 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).

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Average humidity in September
Bison, OK

Average humidity in September - Bison, 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%).

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Average rainfall in September
Bison, OK

Average rainfall in September - Bison, 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").

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Average rainfall days in September
Bison, OK

Average rainfall days in September - Bison, 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).

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Average snowfall in September
Bison, OK

Average snowfall in September - Bison, 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").

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Average snowfall days in September
Bison, OK

Average snowfall days in September - Bison, 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).

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

Average daylight in September / Average sunshine in September - Bison, 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).

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Average sunshine days in September
Bison, OK

Average sunshine days in September - Bison, 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).

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Average UV index in September
Bison, OK

Average UV index in September - Bison, 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
Bison, OK

Average cloud cover in September - Bison, 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).

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Average visibility in September
Bison, OK

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

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