Karnes City Weather in September

What's the weather like in Karnes City (Texas) in September 2025?

The climate in Karnes City during September can be summarized as hot, humid and damp.

September is in the fall / autumn in Karnes City and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (90°F), whilst at night 20°C (69°F) is normal.

Karnes City weather averages (imperial / metric)
Daytime temperature 32.4°C 90.2°F
Nightly temperature 20.3°C 68.5°F
Average temperature 26.3°C 79.3°F
Daily sunshine 8.3 hrs
Avg rainfall 108 mm 4.3 ins
Rainy days 8 days
Sea temperature 28.8°C 83.8°F
Humidity 72%
Windspeed 15.1kph 9 mph

On average September is the wettest month of the year in Karnes City with around 108mm 4.3 inches of rain making it a damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 hours of sunshine per day.

September temperatures in Karnes City

Karnes City average temperature in September

September rainfall

Karnes City average rain in September

September hourly sunshine

Karnes City 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 Karnes City 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

Karnes City weather stats

Karnes City weather statistics
Hottest month: July 34.7°C 94.5°F
Driest month: March 35mm 1.4ins
Sunniest month: July 10.7hrs
Coldest month: January 16.6°C 61.9°F
Wettest month: September 108mm 4.3ins
Map showing location of Karnes City (28.88498, -97.90084) Karnes City map pin © Google

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