September weather forecast
Grand Lake Towne, OK

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Weather in September

September, the first month of the autumn in Grand Lake Towne, is still a warm month, with an average temperature varying between 82°F (27.8°C) and 62.4°F (16.9°C).

Temperature

The arrival of September is marked by a minor reduction in average high-temperature, sliding from a tropical 89.2°F (31.8°C) in August to a warm 82°F (27.8°C). In Grand Lake Towne, an average low-temperature of 62.4°F (16.9°C) is recorded during September nights.

Heat index

The heat index for September is calculated to be a hot 87.8°F (31°C). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

In Grand Lake Towne, the average relative humidity in September is 72%.

Rainfall

In Grand Lake Towne, in September, it is raining for 9.7 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 112.7 rainfall days, and 14.33" (364mm) of precipitation is accumulated.

Snowfall

April, June through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 24min.
On the first day of September, sunrise is at 6:52 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:04 pm CDT.

Sunshine

In September, the average sunshine is 9.3h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Aug 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The high-temperature, in September, in Grand Lake Towne, is 82°F (27.8°C), while the low-temperature averages to 62.4°F (16.9°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is calculated to be 87.8°F (31°C).

What is the average humidity in September?

In Grand Lake Towne, the average relative humidity in September is 72%.

How much does it rain in September?

In Grand Lake Towne, during September, the rain falls for 9.7 days and regularly aggregates up to 1.46" (37mm) of precipitation.

When it does not snow?

April, June through October are months without snowfall.

What is the average length of the day in September?

In Grand Lake Towne, the average day length in September is 12h and 24min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:52 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:04 pm CDT.

How long on average sun shines in September?

The average sunshine duration in September is 9.3h.

What is the UV index reading in September?

In Grand Lake Towne, 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
Grand Lake Towne, OK

Average temperature in September - Grand Lake Towne, OK
  • Average high temperature in September: 82°F

The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (44.4°F).

  • Average low temperature in September: 62.4°F

The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).

Average pressure in September
Grand Lake Towne, OK

Average pressure in September - Grand Lake Towne, OK
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
Grand Lake Towne, OK

Average wind speed in September - Grand Lake Towne, OK
  • Average wind speed in September: 7.5mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).

Average humidity in September
Grand Lake Towne, OK

Average humidity in September - Grand Lake Towne, OK
  • Average humidity in September: 72%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (69%).

Average rainfall in September
Grand Lake Towne, OK

Average rainfall in September - Grand Lake Towne, OK
  • Average rainfall in September: 1.46"

The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is November (0.51").

Average rainfall days in September
Grand Lake Towne, OK

Average rainfall days in September - Grand Lake Towne, OK
  • Average rainfall days in September: 9.7 days

The months with the highest number of rainy days are May and June (12.4 days).
The month with the least rainy days is December (4.9 days).

Average snowfall in September
Grand Lake Towne, OK

Average snowfall in September - Grand Lake Towne, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.43").
The months with the least snowfall are April, June, July, August, September and October (0").

Average snowfall days in September
Grand Lake Towne, OK

Average snowfall days in September - Grand Lake Towne, 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 June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Grand Lake Towne, OK

Average daylight in September / Average sunshine in September - Grand Lake Towne, 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: 9h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).

Average sunshine days in September
Grand Lake Towne, OK

Average sunshine days in September - Grand Lake Towne, OK
  • Average sunshine days in September: 17.5 days

The month with the most sunshine days is December (22.8 days).
The month with the least sunshine days is April (14.8 days).

Average UV index in September
Grand Lake Towne, OK

Average UV index in September - Grand Lake Towne, OK
  • Average UV index in September: 5

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in September
Grand Lake Towne, OK

Average cloud cover in September - Grand Lake Towne, OK
  • Average cloud cover in September: 27

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 23).

Average visibility in September
Grand Lake Towne, OK

Average visibility in September - Grand Lake Towne, 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).

Grand Lake Towne, Oklahoma, USA

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