Sishui Weather in September

What's the weather like in Sishui (Shandong Sheng) in September 2025?

The climate in Sishui during September can be summarized as warm, humid and reasonably dry.

September is in the fall / autumn in Sishui and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (78°F), whilst at night 16°C (60°F) is normal.

Sishui weather averages (imperial / metric)
Daytime temperature 25.7°C 78.3°F
Nightly temperature 15.5°C 59.9°F
Average temperature 20.6°C 69.1°F
Daily sunshine 7.3 hrs
Avg rainfall 75 mm 2.9 ins
Rainy days 9 days
Sea temperature 22.1°C 71.8°F
Humidity 71%
Windspeed 9kph 6 mph

On average September is the 4th wettest month of the year in Sishui with around 75mm 2.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.3 hours of sunshine per day.

September temperatures in Sishui

Sishui average temperature in September

September rainfall

Sishui average rain in September

September hourly sunshine

Sishui 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 Sishui in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Sishui weather stats

Sishui weather statistics
Hottest month: July 30.4°C 86.7°F
Driest month: January 9mm 0.4ins
Sunniest month: May 8.7hrs
Coldest month: January 3.5°C 38.3°F
Wettest month: July 237mm 9.3ins
Map showing location of Sishui (35.64889, 117.27583) Sishui map pin © Google

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