September weather forecast
Haileyville, OK

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Weather in September

The first month of the autumn, September, is still a warm month in Haileyville, Oklahoma, with an average temperature fluctuating between 64.6°F (18.1°C) and 85.1°F (29.5°C).

Temperature

September signals a slight drop in average high-temperature, sliding from August's hot 92.1°F (33.4°C) to a moderately hot 85.1°F (29.5°C). Haileyville encounters a steady low-temperature average of 64.6°F (18.1°C) throughout the month of September.

Heat index

For most parts of September, the heat index is calculated to be a tropical 93.2°F (34°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Keep in mind the heat index values are meant for areas in shade and with light wind. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.

Humidity

The average relative humidity in September is 70%.

Rainfall

In Haileyville, in September, during 12 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the year, there are 128.5 rainfall days, and 24.25" (616mm) of precipitation is accumulated.

Snowfall

In Haileyville, 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 the month, sunrise is at 6:55 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:16 am and sunset at 7:07 pm CDT.

Sunshine

The average sunshine in September is 9h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: An average maximum UV index of 5 in September leads to these recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Updated: Jul 23, 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 85.1°F (29.5°C) and 64.6°F (18.1°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is calculated to be 93.2°F (34°C).

What is the average humidity in September?

The average relative humidity in September is 70%.

How many days does it rain in September?

In Haileyville, during September, the rain falls for 12 days and regularly aggregates up to 2.01" (51mm) of precipitation.

When it does not snow?

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

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:55 am and sunset at 7:48 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 Haileyville have in September?

The average sunshine duration in September is 9h.

What is the UV index intensity in September?

The average daily maximum UV index in September in Haileyville is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability 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
Haileyville, OK

Average temperature in September - Haileyville, OK
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is January (48.7°F).

  • Average low temperature in September: 64.6°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).

Average pressure in September
Haileyville, OK

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

Average wind speed in September
Haileyville, OK

Average wind speed in September - Haileyville, OK
  • Average wind speed in September: 6.3mph

The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

Average humidity in September
Haileyville, OK

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

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (67%).

Average rainfall in September
Haileyville, OK

Average rainfall in September - Haileyville, OK
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is February (1.34").

Average rainfall days in September
Haileyville, OK

Average rainfall days in September - Haileyville, OK
  • Average rainfall days in September: 12 days

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

Average snowfall in September
Haileyville, OK

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

The month with the highest snowfall is February (0.71").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Haileyville, OK

Average snowfall days in September - Haileyville, 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
Haileyville, OK

Average daylight in September / Average sunshine in September - Haileyville, 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 0min

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

Average sunshine days in September
Haileyville, OK

Average sunshine days in September - Haileyville, OK
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is January (22 days).
The month with the least sunshine days is July (14.4 days).

Average UV index in September
Haileyville, OK

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

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
Haileyville, OK

Average cloud cover in September - Haileyville, OK
  • Average cloud cover in September: 27

The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 22).

Average visibility in September
Haileyville, OK

Average visibility in September - Haileyville, 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).

Haileyville, Oklahoma, USA

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