San Marcos Weather in September

What's the weather like in San Marcos (Texas) in September 2024?

The climate in San Marcos during September can be summarized as hot and damp.

September is in the fall / autumn in San Marcos and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a warm 32°C (90°F), whilst at night 20°C (67°F) is normal.

San Marcos weather averages (imperial / metric)
Daytime temperature 32.1°C 89.7°F
Nightly temperature 19.6°C 67.2°F
Average temperature 25.8°C 78.4°F
Daily sunshine 8.3 hrs
Avg rainfall 100 mm 3.9 ins
Rainy days 8 days
Sea temperature 28.7°C 83.6°F
Humidity 69%
Windspeed 14.4kph 9 mph

On average September is the 2nd wettest month of the year in San Marcos with around 100mm 3.9 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 San Marcos

San Marcos average temperature in September

September rainfall

San Marcos average rain in September

September hourly sunshine

San Marcos 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 San Marcos in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

San Marcos weather stats

San Marcos weather statistics
Hottest month: July 34.7°C 94.5°F
Driest month: July 42mm 1.7ins
Sunniest month: July 10.8hrs
Coldest month: January 14.9°C 58.8°F
Wettest month: May 119mm 4.7ins
Map showing location of San Marcos (29.88327, -97.94139) San Marcos map pin © Google

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