September weather forecast
Arlington, OK

September

Weather in September

The first month of the autumn, September, is still a warm month in Arlington, Oklahoma, with temperature in the range of an average high of 29°C and an average low of 18°C.

Temperature

With the beginning of September, the average high-temperature shows a small decrease, transitioning from a tropical 33.3°C in August to a warm 29°C. September nights experience a consistent temperature drop to a comfortable 18°C.

Heat index

In September, the heat index is estimated at a hot 32°C. Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In September, the average relative humidity in Arlington, Oklahoma, is 68%.

Rainfall

In Arlington, Oklahoma, in September, it is raining for 11.7 days, with typically 66mm of accumulated precipitation. Throughout the year, there are 122.6 rainfall days, and 671mm of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:59 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:11 pm CDT.

Sunshine

In September, the average sunshine is 8.5h.

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 exposure to the Sun's UV rays for the ordinary person.
Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Adopt protective measures - Suggestions to resist sunburn are offered. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?
Arlington in September has an average high-temperature of 29°C and an average low-temperature of 18°C. In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is estimated at 32°C.
What is the average humidity in September?
In Arlington, the average relative humidity in September is 68%.
How much does it rain in Arlington in September?
In Arlington, in September, it is raining for 11.7 days, with typically 66mm of accumulated precipitation.
When it does not snow in Arlington?
In Arlington, snow does not fall in May through October.
What is the average length of the day in September in Arlington?
The average day length in September in Arlington is 12h and 23min.
When is the sunrise / sunset in September?
On the first day of September, sunrise is at 6:59 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:11 pm CDT.
How many hours of sunshine does Arlington have in September?
The average sunshine duration in September is 8.5h.
What is the UV index intensity in September?
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
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 - Arlington, OK
Average temperature in September
Arlington, OK
  • Average high temperature in September: 29°C

The warmest months (with the highest average high temperature) are July and August (33.3°C).
The month with the lowest average high temperature is January (8.9°C).

  • Average low temperature in September: 18°C

The month with the highest average low temperature is July (22.4°C).
The coldest month (with the lowest average low temperature) is January (-0.2°C).

Average pressure in September - Arlington, OK
Average pressure in September
Arlington, OK
  • Average pressure in September: 1015.2mbar

The month with the highest atmospheric pressure is January (1021.4mbar).
The month with the lowest atmospheric pressure is June (1012mbar).

Average wind speed in September - Arlington, OK
Average wind speed in September
Arlington, OK
  • Average wind speed in September: 12.9km/h

The windiest month (with the highest average wind speed) is April (18.4km/h).
The calmest months (with the lowest average wind speed) are July and August (12.6km/h).

Average humidity in September - Arlington, OK
Average humidity in September
Arlington, OK
  • Average humidity in September: 68%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is August (64%).

Average rainfall in September - Arlington, OK
Average rainfall in September
Arlington, OK
  • Average rainfall in September: 66mm

The wettest month (with the highest rainfall) is May (111mm).
The driest month (with the least rainfall) is January (30mm).

Average rainfall days in September - Arlington, OK
Average rainfall days in September
Arlington, OK
  • Average rainfall days in September: 11.7 days

The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (5.6 days).

Average snowfall in September - Arlington, OK
Average snowfall in September
Arlington, OK
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (45mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

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

The month with the highest number of snowfall days is February (2.7 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 - Arlington, OK
Average daylight in September /
Average sunshine in September
Arlington, 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 3min

The months with the most sunshine are July and August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

Average sunshine days in September - Arlington, OK
Average sunshine days in September
Arlington, OK
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is January (23 days).
The month with the least sunshine days is May (14.6 days).

Average UV index in September - Arlington, OK
Average UV index in September
Arlington, 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 - Arlington, OK
Average cloud cover in September
Arlington, OK
  • Average cloud cover in September: 28

The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 20).

Average visibility in September - Arlington, OK
Average visibility in September
Arlington, OK
  • Average visibility in September: 9km

The months with the highest visibility are January, March, June, August, October, November and December (10km).
The months with the lowest visibility are February, April, May, July and September (9km).

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