September weather forecast
Forest Hill, OK

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Weather in September

September, the first month of the autumn in Forest Hill, is also a moderately hot month, with temperature in the range of an average low of 63.3°F (17.4°C) and an average high of 85.5°F (29.7°C).

Temperature

The onset of September brings a small shift in high-temperatures, falling from a hot 92.5°F (33.6°C) in August to a warm 85.5°F (29.7°C). During September, Forest Hill detects a significant contrast from its daytime temperatures, with nights averaging at an enjoyable 63.3°F (17.4°C).

Heat index

In September, the average heat index is estimated at a tropical 93.2°F (34°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.

Humidity

In Forest Hill, the average relative humidity in September is 70%.

Rainfall

In Forest Hill, during September, the rain falls for 11.7 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, there are 146.2 rainfall days, and 33.62" (854mm) of precipitation is accumulated.

Snowfall

In Forest Hill, snow does not fall in April through November.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:51 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:03 pm CDT.

Sunshine

The average sunshine in September is 9.3h.

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 average person.
Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

In Forest Hill, in September, the average high-temperature is 85.5°F (29.7°C), and the average low-temperature is 63.3°F (17.4°C). In September, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is estimated at 93.2°F (34°C).

What is the average humidity in September?

In Forest Hill, the average relative humidity in September is 70%.

How many days does it rain in September?

In Forest Hill, during September, the rain falls for 11.7 days and regularly aggregates up to 2.52" (64mm) of precipitation.

When it does not snow?

April through November are months without snowfall.

How many hours of daylight does Forest Hill have in September?

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

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:51 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:03 pm CDT.

How many hours of sunshine does Forest Hill have in September?

The average sunshine duration in September is 9.3h.

How high is the UV index in September?

In Forest Hill, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk 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
Forest Hill, OK

Average temperature in September - Forest Hill, OK
  • Average high temperature in September: 85.5°F

The warmest month (with the highest average high temperature) is July (93.2°F).
The month with the lowest average high temperature is January (49.1°F).

  • Average low temperature in September: 63.3°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (32.2°F).

Average pressure in September
Forest Hill, OK

Average pressure in September - Forest Hill, OK
  • Average pressure in September: 30"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Forest Hill, OK

Average wind speed in September - Forest Hill, OK
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in September
Forest Hill, OK

Average humidity in September - Forest Hill, OK
  • Average humidity in September: 70%

The months with the highest relative humidity are February, March and May (76%).
The month with the lowest relative humidity is August (69%).

Average rainfall in September
Forest Hill, OK

Average rainfall in September - Forest Hill, OK
  • Average rainfall in September: 2.52"

The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is January (1.97").

Average rainfall days in September
Forest Hill, OK

Average rainfall days in September - Forest Hill, OK
  • Average rainfall days in September: 11.7 days

The month with the highest number of rainy days is August (14.9 days).
The month with the least rainy days is November (9 days).

Average snowfall in September
Forest Hill, OK

Average snowfall in September - Forest Hill, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.14").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in September
Forest Hill, OK

Average snowfall days in September - Forest Hill, OK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.1 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
Forest Hill, OK

Average daylight in September / Average sunshine in September - Forest Hill, 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 54min).

  • Average sunshine in September: 9h and 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).

Average sunshine days in September
Forest Hill, OK

Average sunshine days in September - Forest Hill, OK
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (13.2 days).

Average UV index in September
Forest Hill, OK

Average UV index in September - Forest Hill, OK
  • Average UV index in September: 6

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

Average cloud cover in September
Forest Hill, OK

Average cloud cover in September - Forest Hill, OK
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are June and August (Cloud cover 25).

Average visibility in September
Forest Hill, OK

Average visibility in September - Forest Hill, 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).

Forest Hill, Oklahoma, USA

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