September weather forecast
Bethany, OK

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Weather in September

September marks the onset of fall in Bethany. As the city bids goodbye to the hot summer, a comfortable drop in temperature takes place. The decreased daylight hours subtly hint at the eventual transition to winter. Despite these noticeable changes, September continues to offer quality sunshine and composes an ideal weather scenario. Bethany enters a phase of moderate temperatures, perfect for exploring outdoor attractions.

Temperature

September's arrival signals a moderate reduction in the average high-temperature, easing from a hot 92.8°F (33.8°C) in August to a warm 84.6°F (29.2°C). Throughout September, Bethany encounters an average temperature drop to a comfortable 65.7°F (18.7°C).

Heat index

September's average heat index is calculated to be a tropical 89.6°F (32°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.
In the scope of the heat index, its values resonate with shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in September in Bethany is 65%.

Rainfall

In Bethany, in September, during 13 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. Throughout the year, there are 120.9 rainfall days, and 24.65" (626mm) of precipitation is accumulated.

Snowfall

In Bethany, Oklahoma, snow does not fall in May through October.

Daylight

In September, the average length of the day in Bethany, Oklahoma, is 12h and 23min.
On the first day of the month, sunrise is at 7:03 am and sunset at 7:57 pm. On the last day of September, in Bethany, Oklahoma, sunrise is at 7:25 am and sunset at 7:15 pm CDT.

Sunshine

In Bethany, the average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index in Bethany is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index, 5 during September, leads to the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
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Frequently asked questions

How hot does it get in Bethany in September?

The average high-temperature and low-temperature in Bethany, Oklahoma, during September are 84.6°F (29.2°C) and 65.7°F (18.7°C) respectively. In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 89.6°F (32°C).

What is the average humidity in September in Bethany?

In September, the average relative humidity in Bethany, Oklahoma, is 65%.

How much does it rain in Bethany in September?

In Bethany, in September, it is raining for 13 days, with typically 2.76" (70mm) of accumulated precipitation.

When it does not snow in Bethany?

May through October are months without snowfall in Bethany, Oklahoma.

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

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

When is the sunrise / sunset in September in Bethany?

In September, on the first day of the month, sunrise is at 7:03 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:15 pm CDT.

How many hours of sunshine does Bethany have in September?

The average sunshine duration in September in Bethany, Oklahoma, is 8.6h.

What is the UV index intensity in September in Bethany?

The average daily maximum UV index in September in Bethany, Oklahoma, is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health 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
Bethany, OK

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

The warmest month (with the highest average high temperature) is July (93.7°F).
The month with the lowest average high temperature is January (48.6°F).

  • Average low temperature in September: 65.7°F

The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).

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Average pressure in September
Bethany, OK

Average pressure in September - Bethany, 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 (29.87"Hg).

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Average wind speed in September
Bethany, OK

Average wind speed in September - Bethany, OK
  • Average wind speed in September: 9mph

The windiest month (with the highest average wind speed) is April (12.4mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

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Average humidity in September
Bethany, OK

Average humidity in September - Bethany, OK
  • Average humidity in September: 65%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (59%).

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Average rainfall in September
Bethany, OK

Average rainfall in September - Bethany, OK
  • Average rainfall in September: 2.76"

The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is December (0.94").

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Average rainfall days in September
Bethany, OK

Average rainfall days in September - Bethany, OK
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (4.4 days).

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Average snowfall in September
Bethany, OK

Average snowfall in September - Bethany, 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
Bethany, OK

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

The month with the highest number of snowfall days is February (3.2 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
Bethany, OK

Average daylight in September / Average sunshine in September - Bethany, 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 4min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in September
Bethany, OK

Average sunshine days in September - Bethany, OK
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is May (13.8 days).

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Average UV index in September
Bethany, OK

Average UV index in September - Bethany, 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
Bethany, OK

Average cloud cover in September - Bethany, OK
  • Average cloud cover in September: 27

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 19).

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Average visibility in September
Bethany, OK

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

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