Niihama Weather in September

What's the weather like in Niihama (Ehime) in September 2024?

The climate in Niihama during September can be summarized as warm, humid and very wet.

September is in the fall / autumn in Niihama and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (78°F), whilst at night 18°C (65°F) is normal.

Niihama weather averages (imperial / metric)
Daytime temperature 25.7°C 78.3°F
Nightly temperature 18.1°C 64.6°F
Average temperature 21.9°C 71.4°F
Daily sunshine 5.5 hrs
Avg rainfall 223 mm 8.8 ins
Rainy days 17 days
Sea temperature 26.7°C 80.1°F
Humidity 77%
Windspeed 9kph 6 mph

On average September is the 3rd wettest month of the year in Niihama with around 223mm 8.8 inches of rain making it a very wet time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.5 hours of sunshine per day.

September temperatures in Niihama

Niihama average temperature in September

September rainfall

Niihama average rain in September

September hourly sunshine

Niihama 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 Niihama in September 2024.

Other monthly averages

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Niihama weather stats

Niihama weather statistics
Hottest month: August 29.2°C 84.6°F
Driest month: December 33mm 1.3ins
Sunniest month: August 7.1hrs
Coldest month: January 6.9°C 44.4°F
Wettest month: June 291mm 11.5ins
Map showing location of Niihama (33.95933, 133.31672) Niihama map pin © Google

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