September weather forecast
Henryetta, OK

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Weather in September

September, the first month of the autumn in Henryetta, is also a moderately hot month, with an average temperature ranging between max 84.6°F (29.2°C) and min 64.6°F (18.1°C).

Temperature

A minor decrease in the average high-temperature is observed during September, shifting from a hot 91.9°F (33.3°C) in August to a moderately hot 84.6°F (29.2°C). Henryetta, during September, witnesses an average low-temperature of 64.6°F (18.1°C).

Heat index

In September, the heat index is appraised at a hot 91.4°F (33°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.

Humidity

In September, the average relative humidity is 69%.

Rainfall

In September, the rain falls for 12.3 days. Throughout September, 2.6" (66mm) of precipitation is accumulated. Throughout the year, there are 132.2 rainfall days, and 29.49" (749mm) of precipitation is accumulated.

Snowfall

In Henryetta, snow does not fall in May 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 7:50 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:08 pm CDT.

Sunshine

In September, the average sunshine is 8.7h.

UV index

In Henryetta, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 5 during September leads to these advisories:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Updated: Jun 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

The average high-temperature and low-temperature during September are 84.6°F (29.2°C) and 64.6°F (18.1°C) respectively. In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is appraised at 91.4°F (33°C).

What is the average humidity in September?

The average relative humidity in September is 69%.

How much does it rain in September?

In Henryetta, in September, it is raining for 12.3 days, with typically 2.6" (66mm) of accumulated precipitation.

When it does not snow?

In Henryetta, snow does not fall in May through October.

How many hours of daylight does Henryetta have in September?

The average day length in September is 12h and 23min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:56 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:08 pm CDT.

How long on average sun shines in September?

In Henryetta, the average sunshine duration in September is 8.7h.

What is the UV index intensity in September?

The average daily maximum UV index in September in Henryetta is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's 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
Henryetta, OK

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

The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is January (48°F).

  • Average low temperature in September: 64.6°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 (32.2°F).

Average pressure in September
Henryetta, OK

Average pressure in September - Henryetta, 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 (29.9"Hg).

Average wind speed in September
Henryetta, OK

Average wind speed in September - Henryetta, OK
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is March (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

Average humidity in September
Henryetta, OK

Average humidity in September - Henryetta, OK
  • Average humidity in September: 69%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is August (66%).

Average rainfall in September
Henryetta, OK

Average rainfall in September - Henryetta, OK
  • Average rainfall in September: 2.6"

The wettest month (with the highest rainfall) is May (4.84").
The driest month (with the least rainfall) is February (1.42").

Average rainfall days in September
Henryetta, OK

Average rainfall days in September - Henryetta, OK
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is January (6.9 days).

Average snowfall in September
Henryetta, OK

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

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

Average snowfall days in September
Henryetta, OK

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

The month with the highest number of snowfall days is February (2 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
Henryetta, OK

Average daylight in September / Average sunshine in September - Henryetta, 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 4min

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 36min).

Average sunshine days in September
Henryetta, OK

Average sunshine days in September - Henryetta, OK
  • Average sunshine days in September: 16 days

The month with the most sunshine days is January (21.8 days).
The months with the least sunshine days are April and May (14.4 days).

Average UV index in September
Henryetta, OK

Average UV index in September - Henryetta, 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
Henryetta, OK

Average cloud cover in September - Henryetta, OK
  • Average cloud cover in September: 28

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

Average visibility in September
Henryetta, OK

Average visibility in September - Henryetta, 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).

Henryetta, Oklahoma, USA

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