Iiyama Weather in October
Iiyama in October sees pleasant temperatures, with highs around 19°C (66°F) and overnight lows of 9°C (48°F). With the rainy season in full effect, expect around 181 mm (7.1 in) of rainfall and regular showers throughout the month.
Rainfall in Iiyama in October
Iiyama is in the rainy season in October, with rain on around 17 days and an average of 181 mm (7.1 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Iiyama in October
October in Iiyama brings typical temperatures with highs around 19°C (66°F) and lows of 9°C (48°F). The difference between afternoon and evening temperatures is usually noticeable. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Iiyama in October
The city usually sees around 135 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).If you prefer dry days with pleasant temperatures, May typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Iiyama's climate page.
Iiyama Temperature in October
Min Temperature
9°C (48°F)
Max Temperature
19°C (66°F)
Chance of Rain
56%
Precipitation
181 mm (7.1 in)
Rainy days
17 days
Humidity
77% *
Sunshine
135 hours *
Percentage Sunshine
*
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Iiyama typically drop from around 22°C (72°F) at the start of October to approximately 17°C (63°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 15°C (59°F).
Average temperatures in October
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in October
Historical weather for Iiyama in October
Browse day-by-day weather records for Iiyama spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Iiyama historical weather extremes in October
According to our 19 years of weather records for Iiyama, the following extremes were recorded between 2006 and 2025.
- On October 6, 2018, temperatures climbed to 31°C (88°F), marking the warmest October day on record.
- The lowest daytime temperature in October was 8°C (46°F), recorded on October 28, 2010.
- Iiyama registered its coldest October night on October 24, 2025, with temperatures dropping to 2°C (36°F).
Best Places in Japan in October
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in October →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Iiyama in October
Pleasant temperatures in October mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Iiyama in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Iiyama's climate page.
Temperature Rainfall Sunshine Humidity
See the full Iiyama climate overview or explore weather in Japan.
