Fort Sumner Weather in September

What's the weather like in Fort Sumner (New Mexico) in September 2025?

The climate in Fort Sumner during September can be summarized as warm and reasonably dry.

September is in the fall / autumn in Fort Sumner and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (83°F), whilst at night 12°C (54°F) is normal.

Fort Sumner weather averages (imperial / metric)
Daytime temperature 28.5°C 83.2°F
Nightly temperature 12°C 53.5°F
Average temperature 20.2°C 68.4°F
Daily sunshine 9.6 hrs
Avg rainfall 51 mm 2 ins
Rainy days 7 days
Sea temperature 21.5°C 70.7°F
Humidity 55%
Windspeed 15.8kph 10 mph

On average September is the 3rd wettest month of the year in Fort Sumner with around 51mm 2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.6 hours of sunshine per day.

September temperatures in Fort Sumner

Fort Sumner average temperature in September

September rainfall

Fort Sumner average rain in September

September hourly sunshine

Fort Sumner average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Fort Sumner in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Fort Sumner weather stats

Fort Sumner weather statistics
Hottest month: July 32.8°C 91°F
Driest month: January 10mm 0.4ins
Sunniest month: June 12.3hrs
Coldest month: January 11.7°C 53.1°F
Wettest month: August 78mm 3.1ins
Map showing location of Fort Sumner (34.47173, -104.24553) Fort Sumner map pin © Google

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