September weather forecast
Custer City, OK

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Weather in September

September, the first month of the autumn in Custer City, is also a moderately hot month, with temperature in the range of an average low of 65.8°F (18.8°C) and an average high of 84.6°F (29.2°C).

Temperature

The beginning of September marks a decrease in the average high-temperature, transitioning from a hot 93.7°F (34.3°C) in August to a warm 84.6°F (29.2°C). The average low-temperature of 65.8°F (18.8°C) is witnessed during September.

Heat index

The heat index in September is estimated at a hot 89.6°F (32°C). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level 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 particularly important for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.

Humidity

The average relative humidity in September is 61%.

Rainfall

In Custer City, in September, during 12.1 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. In Custer City, during the entire year, the rain falls for 106 days and collects up to 19.96" (507mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In Custer City, the average length of the day in September is 12h and 23min.
On the first day of September in Custer City, sunrise is at 7:08 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:20 pm CDT.

Sunshine

The average sunshine in September in Custer City is 8.9h.

UV index

The average daily maximum UV index in September in Custer City, Oklahoma, is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the maximum UV index of 5 transforms into these recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.

Frequently asked questions

How hot is it in September?

In Custer City, in September, the average high-temperature is 84.6°F (29.2°C), and the average low-temperature is 65.8°F (18.8°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is estimated at 89.6°F (32°C).

What is the average humidity in September?

The average relative humidity in September is 61%.

How many days does it rain in September?

In September, in Custer City, the rain falls for 12.1 days. Throughout September, 2.13" (54mm) of precipitation is accumulated.

When it does not snow?

In Custer City, snow does not fall in May through September.

Does it snow in September?

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

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

On the first day of September in Custer City, sunrise is at 7:08 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:20 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.9h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to 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
Custer City, OK

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

The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is January (48.7°F).

  • Average low temperature in September: 65.8°F

The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

Average pressure in September
Custer City, OK

Average pressure in September - Custer City, 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
Custer City, OK

Average wind speed in September - Custer City, OK
  • Average wind speed in September: 9.6mph

The windiest month (with the highest average wind speed) is April (12.8mph).
The calmest month (with the lowest average wind speed) is August (9.1mph).

Average humidity in September
Custer City, OK

Average humidity in September - Custer City, OK
  • Average humidity in September: 61%

The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is August (54%).

Average rainfall in September
Custer City, OK

Average rainfall in September - Custer City, OK
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is May (3.98").
The driest months (with the least rainfall) are January, February and December (0.83").

Average rainfall days in September
Custer City, OK

Average rainfall days in September - Custer City, OK
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is January (3.8 days).

Average snowfall in September
Custer City, OK

Average snowfall in September - Custer City, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Custer City, OK

Average snowfall days in September - Custer City, OK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.8 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
Custer City, OK

Average daylight in September / Average sunshine in September - Custer City, 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 month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

Average sunshine days in September
Custer City, OK

Average sunshine days in September - Custer City, OK
  • Average sunshine days in September: 16.3 days

The month with the most sunshine days is January (25.2 days).
The month with the least sunshine days is May (14 days).

Average UV index in September
Custer City, OK

Average UV index in September - Custer City, 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
Custer City, OK

Average cloud cover in September - Custer City, OK
  • Average cloud cover in September: 25

The month with the most cloud cover is April (Cloud cover 34).
The month with the least cloud cover is August (Cloud cover 18).

Average visibility in September
Custer City, OK

Average visibility in September - Custer City, 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).

Custer City, Oklahoma, USA

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