Chase the autumn leaves in Japan
Japan is one of these cases which turns into a gold, yellow and orange fairy tale starting from September. And we can honestly say: We cannot imagine a more beautiful season to visit Japan.
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.
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
*
* Data from: Joetsu, Japan (30 KM, 18 Miles).
Iiyama Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Iiyama - and find the best time to visit.
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 records 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
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
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 month
What To Do in Iiyama in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming6/10 -
Camping3/10
Iiyama 3-Day Forecast
More climate data for Iiyama
Temperature Rainfall Sunshine Humidity
See the full Iiyama climate overview or explore weather in Japan.
Popular in October
Where to go in October - average daytime high across popular destinations.
Naha
28°C (82°F) Osaka
24°C (75°F) Kyoto23°C (73°F) Tokyo23°C (73°F) Hakone21°C (70°F) Hakuba17°C (63°F) Sapporo16°C (61°F) Niseko15°C (59°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Chase the autumn leaves in Japan
Walk the 88 temple circuit
We recommend walking the 88 temple circuit from April til October. Although June, July and August can be a bit wet, hot and humid.
The famous bamboo forests of Arashiyama
The famous bamboo forests of Arashiyama lie just outside the city center of Kyoto and is unique in the world. If you look at photos of this bamboo forest, it looks like you have landed in a fairy-tale world.
10 reasons why you should visit Japan in winter
Here are 10 reasons why you should plan a winter trip to Japan. During this period, popular sights are less busy and prices for flights and hotels much cheaper.