Altus
Oklahoma, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Altus, OK

The first month of the autumn, September, is still a tropical month in Altus, Oklahoma, with average temperature varying between 62.1°F (16.7°C) and 88.3°F (31.3°C).

Temperature

In Altus, the average high-temperature marginally drops, from a very hot 96.6°F (35.9°C) in August, to a tropical 88.3°F (31.3°C). The average low-temperature, in Altus, is 62.1°F (16.7°C).

Rainfall

In Altus, in September, it is raining for 7 days, with typically 2.7" (68.6mm) of accumulated precipitation. In Altus, during the entire year, the rain falls for 70 days and collects up to 25.8" (654.4mm) of precipitation.

Snowfall

In Altus, during the entire year, snow aggregates up to 5" (126.9mm).

Daylight

In September, the average length of the day is 12.4h.

Sunshine

The average sunshine in September is 9h.

UV index

The average daily maximum UV index in September is 8. A UV Index of 8 to 10 symbolizes a very high threat to health from the exposure to the Sun's UV rays for the average person.
In September, the average maximum UV index of 8 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Altus?

The average high-temperature, in September, in Altus, Oklahoma, is 88.3°F (31.3°C), while the average low-temperature is 62.1°F (16.7°C).

How much does it rain in Altus in September?

In Altus, Oklahoma, during September, the rain falls for 7 days and regularly aggregates up to 2.7" (68.6mm) of precipitation.

How many hours of daylight does Altus have in September?

In Altus, the average length of the day in September is 12.4h.

How long on average sun shines in September in Altus?

In Altus, the average sunshine in September is 9h.

What is the UV index intensity in September in Altus?

The average daily maximum UV index in September in Altus, Oklahoma, is 8. A UV Index reading of 8 to 10 represents a very high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Altus, OK
  • Average high temperature in September: 88.4°F

The warmest month (with the highest average high temperature) is July (97.5°F).
The month with the lowest average high temperature is January (53.1°F).

  • Average low temperature in September: 62°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

Average rainfall in September - Altus, OK
  • Average rainfall in September: 2.7"

The wettest month (with the highest rainfall) is May (4").
The driest month (with the lowest rainfall) is January (0.9").

Average rainfall days in September - Altus, OK
  • Average rainfall days in September: 7 days

The month with the highest number of rainy days is May (8 days).
Months with the lowest number of rainy days are January and November (4 days).

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

The month with the highest snowfall is January (1.8").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average daylight in September / Average sunshine in September - Altus, OK
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 9h

The month with most sunshine is July (Average sunshine: 12h).
The month with least sunshine is December (Average sunshine: 6h).

Average UV index in September - Altus, OK
  • Average UV index in September: 8

Months with the highest UV index are May, June, July and August (UV index 10).
The month with the lowest UV index is December (UV index 2).