Ōmihachiman Weather in October

What's the weather like in Ōmihachiman (Shiga) in October 2025?

The climate in Ōmihachiman during October can be summarized as mild and damp.

October is in the fall / autumn in Ōmihachiman and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 12°C (53°F) is normal.

Ōmihachiman weather averages (imperial / metric)
Daytime temperature 21°C 69.8°F
Nightly temperature 11.8°C 53.2°F
Average temperature 16.4°C 61.5°F
Daily sunshine 5.3 hrs
Avg rainfall 111 mm 4.4 ins
Rainy days 15 days
Sea temperature 22.8°C 73°F
Humidity 75%
Windspeed 8.3kph 5 mph

On average October is the 6th driest month of the year in Ōmihachiman with around 111mm 4.4 inches of rain making it a damp time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.3 hours of sunshine per day.

October temperatures in Ōmihachiman

Ōmihachiman average temperature in October

October rainfall

Ōmihachiman average rain in October

October hourly sunshine

Ōmihachiman average rain in October

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 Ōmihachiman in October 2025.

Other monthly averages

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Ōmihachiman weather stats

Ōmihachiman weather statistics
Hottest month: August 31.2°C 88.2°F
Driest month: December 68mm 2.7ins
Sunniest month: August 6.6hrs
Coldest month: January 6.9°C 44.4°F
Wettest month: June 223mm 8.8ins
Map showing location of Ōmihachiman (35.12861, 136.0976) Ōmihachiman map pin © Google

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