Fort Sill
Oklahoma, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Fort Sill, OK

September, the first month of the autumn, in Fort Sill, is still a warm month, with average temperature fluctuating between 85.8°F (29.9°C) and 61.9°F (16.6°C).


In Fort Sill, the average high-temperature in September decreases, from a hot 94.8°F (34.9°C) in August, to a warm 85.8°F (29.9°C). In Fort Sill, the average low-temperature is 61.9°F (16.6°C).


Throughout September, 3.7" (94mm) of precipitation is accumulated. Throughout the year, in Fort Sill, Oklahoma, 29.3" (744.2mm) of rain is accumulated.


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

What is the temperature in September in Fort Sill?

In Fort Sill, in September, the average high-temperature is 85.8°F (29.9°C), and the average low-temperature is 61.9°F (16.6°C).

How much does it rain in Fort Sill in September?

During September, Fort Sill regularly aggregates up to 3.7" (94mm) of precipitation.

How many hours of daylight does Fort Sill have in September?

The average length of the day in September in Fort Sill, Oklahoma, is 12.4h.
Average temperature in September - Fort Sill, OK
  • Average high temperature in September: 85.9°F

The warmest month (with the highest average high temperature) is July (95.8°F).
The month with the lowest average high temperature is January (49.9°F).

  • Average low temperature in September: 61.9°F

The month with the highest average low temperature is July (71°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

Average rainfall in September - Fort Sill, OK
  • Average rainfall in September: 3.7"

The wettest month (with the highest rainfall) is May (4.9").
The driest month (with the lowest rainfall) is January (1.1").

Average daylight in September - Fort Sill, OK
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).