Iiyama weather
At 8:15 AM local time it was mostly clear and 12°C (53°F). Little to no rain in the next 24 hours. Best months for weather: May–Jun, Aug–Sep. Iiyama sits 313 m (1,027 ft) above sea level, which keeps it cooler than the coast. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Iiyama, Nagano, Japan.
Current conditions
- Clouds
- 47%
- Chance of rain
- 49%
- Rain
- 0.0 mm/h
Hourly Forecast
Little to no rain in the next 24 hours
Daily Forecast
Best Time to Visit
Peak season May–Jun, Aug–SepOff season Dec–Mar
About Iiyama weather
Is it raining in Iiyama right now?
No. It’s mostly clear and 12° right now. Little to no rain in the next 24 hours.
What’s the weather like in Iiyama this week?
Over the next 7 days, expect highs of 11–19° and lows of 7–11°. Rain is likely on 6 of 7 days (Sunday, Monday, Tuesday, Thursday, Friday, Saturday). The driest day looks like Wednesday.
Has it been raining in Iiyama lately?
In the past 7 days, Iiyama had 6 rainy days and 52.6 mm of rain in total.
What should I pack for Iiyama?
For the coming week, bring an umbrella or rain jacket and a warm layer for the evenings.
Iiyama weather by month
When is the best time to visit Iiyama?
Based on weather alone, the best time to visit Iiyama is May–Jun, Aug–Sep, according to NASA's 2001–2025 climate averages. Dec–Mar tends to be the least pleasant. Average highs run from 2°C (36°F) in January to 27°C (81°F) in August.
What is the rainiest month in Iiyama?
December is the wettest month, with about 215 mm (8.5 in) of rain on average. May is the driest, with about 92 mm (3.6 in).
What is the hottest month in Iiyama?
August is the warmest, with average highs of 27°C (81°F) and lows of 21°C (69°F). January is the coolest, with highs of 2°C (36°F) and lows of -3°C (27°F).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months