September weather forecast
Big Rocks, OK

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Weather in September

September, the first month of the autumn in Big Rocks, is still a hot month, with an average temperature ranging between min 65.5°F (18.6°C) and max 86.4°F (30.2°C).

Temperature

With the onset of September, the average high-temperature subtly recedes from August's 92.8°F (33.8°C) to a still hot 86.4°F (30.2°C). Big Rocks, in September, witnesses an average low-temperature of 65.5°F (18.6°C).

Heat index

September's average heat index is computed to be a very hot 95°F (35°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Consider that heat index readings are for situations in the shade and light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in September is 69%.

Rainfall

In Big Rocks, during September, the rain falls for 12.8 days and regularly aggregates up to 2.91" (74mm) of precipitation. In Big Rocks, during the entire year, the rain falls for 149.7 days and collects up to 37.6" (955mm) of precipitation.

Snowfall

In Big Rocks, snow does not fall in April through October.

Daylight

The average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 6:56 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:16 am and sunset at 7:07 pm CDT.

Sunshine

In Big Rocks, the average sunshine in September is 8.9h.

UV index

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.

Frequently asked questions

How hot is September?

In September, in Big Rocks, the average high-temperature is 86.4°F (30.2°C), and the average low-temperature is 65.5°F (18.6°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is computed to be 95°F (35°C).

What is the average humidity in September?

In Big Rocks, the average relative humidity in September is 69%.

How much does it rain in September?

In September, the rain falls for 12.8 days. Throughout September, 2.91" (74mm) of precipitation is accumulated.

When it does not snow?

April through October are months without snowfall.

What is the average length of the day in September?

In September, the average day length is 12h and 22min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:56 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:07 pm CDT.

How many hours of sunshine does Big Rocks have in September?

In Big Rocks, the average sunshine duration in September is 8.9h.

How high is the UV index in September?

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health threat 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
Big Rocks, OK

Average temperature in September - Big Rocks, OK
  • Average high temperature in September: 86.4°F

The warmest month (with the highest average high temperature) is August (92.8°F).
The month with the lowest average high temperature is January (50.5°F).

  • Average low temperature in September: 65.5°F

The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (34.7°F).

Average pressure in September
Big Rocks, OK

Average pressure in September - Big Rocks, 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 (29.91"Hg).

Average wind speed in September
Big Rocks, OK

Average wind speed in September - Big Rocks, OK
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in September
Big Rocks, OK

Average humidity in September - Big Rocks, OK
  • Average humidity in September: 69%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is August (66%).

Average rainfall in September
Big Rocks, OK

Average rainfall in September - Big Rocks, OK
  • Average rainfall in September: 2.91"

The wettest month (with the highest rainfall) is May (5.12").
The driest month (with the least rainfall) is January (1.97").

Average rainfall days in September
Big Rocks, OK

Average rainfall days in September - Big Rocks, OK
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (8.5 days).

Average snowfall in September
Big Rocks, OK

Average snowfall in September - Big Rocks, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Big Rocks, OK

Average snowfall days in September - Big Rocks, OK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Big Rocks, OK

Average daylight in September / Average sunshine in September - Big Rocks, 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 5min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

Average sunshine days in September
Big Rocks, OK

Average sunshine days in September - Big Rocks, OK
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is May (12.9 days).

Average UV index in September
Big Rocks, OK

Average UV index in September - Big Rocks, OK
  • Average UV index in September: 6

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
Big Rocks, OK

Average cloud cover in September - Big Rocks, OK
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 22).

Average visibility in September
Big Rocks, OK

Average visibility in September - Big Rocks, 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).

Big Rocks, Oklahoma, USA

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