September weather forecast
Mounds, OK

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Weather in September

The first month of the autumn, September, is still a warm month in Mounds, Oklahoma, with an average temperature fluctuating between 64°F (17.8°C) and 83.5°F (28.6°C).

Temperature

In Mounds, entering September brings a subtle temperature decrement, reducing from August's tropical 90.7°F (32.6°C) to a warm 83.5°F (28.6°C). During the month of September, Mounds's nighttime temperature lowers to an average of 64°F (17.8°C).

Heat index

For most parts of September, the heat index is estimated at a hot 89.6°F (32°C). If one endures exposure and continues to be active, it might result in tiredness and heat cramps.
In reference to the heat index, it's for places in shade and with a slight wind. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. 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 kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.

Humidity

In September, the average relative humidity is 70%.

Rainfall

In September, the rain falls for 11.9 days. Throughout September, 3.39" (86mm) of precipitation is accumulated. In Mounds, during the entire year, the rain falls for 129 days and collects up to 29.41" (747mm) of precipitation.

Snowfall

In Mounds, snow does not fall in March through October.

Daylight

In September, the average length of the day is 12h and 23min.
On the first day of September, sunrise is at 6:56 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:08 pm CDT.

Sunshine

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

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transforms into the following instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

During September, Mounds experiences an average high-temperature of 83.5°F (28.6°C) and a low-temperature of 64°F (17.8°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in September is estimated at 89.6°F (32°C).

What is the average humidity in September?

The average relative humidity in September in Mounds is 70%.

How much does it rain in September?

In Mounds, during September, the rain falls for 11.9 days and regularly aggregates up to 3.39" (86mm) of precipitation.

When it does not snow?

In Mounds, snow does not fall in March through October.

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

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

When are sunrise and sunset in September?

On the first day of September in Mounds, sunrise is at 6:56 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:08 pm CDT.

How many hours of sunshine does Mounds have in September?

The average sunshine duration in September in Mounds is 8.6h.

How high is the UV index in September in Mounds?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health risk 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
Mounds, OK

Average temperature in September - Mounds, OK
  • Average high temperature in September: 83.5°F

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is January (46.6°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

Average pressure in September
Mounds, OK

Average pressure in September - Mounds, OK
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in September
Mounds, OK

Average wind speed in September - Mounds, OK
  • Average wind speed in September: 7.5mph

The windiest month (with the highest average wind speed) is March (10.8mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).

Average humidity in September
Mounds, OK

Average humidity in September - Mounds, OK
  • Average humidity in September: 70%

The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January, August and October (67%).

Average rainfall in September
Mounds, OK

Average rainfall in September - Mounds, OK
  • Average rainfall in September: 3.39"

The wettest month (with the highest rainfall) is May (5.08").
The driest month (with the least rainfall) is January (1.26").

Average rainfall days in September
Mounds, OK

Average rainfall days in September - Mounds, OK
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (6 days).

Average snowfall in September
Mounds, OK

Average snowfall in September - Mounds, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.18").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").

Average snowfall days in September
Mounds, OK

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

The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Mounds, 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 48min).

  • Average sunshine in September: 8h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

Average sunshine days in September
Mounds, OK

Average sunshine days in September - Mounds, OK
  • Average sunshine days in September: 16.6 days

The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is May (14.2 days).

Average UV index in September
Mounds, OK

Average UV index in September - Mounds, OK
  • Average UV index in September: 5

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

Average cloud cover in September
Mounds, OK

Average cloud cover in September - Mounds, OK
  • Average cloud cover in September: 29

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 21).

Average visibility in September
Mounds, OK

Average visibility in September - Mounds, 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).

Mounds, Oklahoma, USA

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