Timber Lake Weather in September

What's the weather like in Timber Lake (South Dakota) in September 2025?

The climate in Timber Lake during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Timber Lake and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 8°C (46°F) is normal.

Timber Lake weather averages (imperial / metric)
Daytime temperature 22.9°C 73.2°F
Nightly temperature 7.7°C 45.9°F
Average temperature 15.3°C 59.5°F
Daily sunshine 9.3 hrs
Avg rainfall 31 mm 1.2 ins
Rainy days 7 days
Sea temperature 15.4°C 59.6°F
Humidity 60%
Windspeed 17.3kph 11 mph

On average September is the 6th wettest month of the year in Timber Lake with around 31mm 1.2 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 9.3 hours of sunshine per day.

September temperatures in Timber Lake

Timber Lake average temperature in September

September rainfall

Timber Lake average rain in September

September hourly sunshine

Timber Lake 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 Timber Lake 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

Timber Lake weather stats

Timber Lake weather statistics
Hottest month: July 30.3°C 86.5°F
Driest month: January 6mm 0.2ins
Sunniest month: July 12.3hrs
Coldest month: January -3.8°C 25.2°F
Wettest month: June 76mm 3ins
Map showing location of Timber Lake (45.42915, -101.07403) Timber Lake map pin © Google

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