Iiyama Weather in April
With daytime temperatures of 14°C (57°F) and nighttime lows of 3°C (37°F), April in Iiyama brings moderate temperatures during the day. It is also the driest month of the year, with minimal rainfall.
Rainfall in Iiyama in April
You can expect the least amount of rain of the year this month. The dry conditions are a bonus, even if the cooler temperatures mean you'll need to dress accordingly. Rain is expected on roughly 17 days, totalling around 126 mm (5 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Iiyama in April
If you're visiting Iiyama in April, expect highs of 14°C (57°F) and overnight lows around 3°C (37°F). The difference between afternoon and evening temperatures is usually noticeable. Nights drop to 3°C (37°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Iiyama in April
With about 182 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.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 April
Min Temperature
3°C (37°F)
Max Temperature
14°C (57°F)
Chance of Rain
57%
Precipitation
126 mm (5 in)
Rainy days
17 days
Humidity
67% *
Sunshine
182 hours *
Percentage Sunshine
*
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Iiyama typically rise from around 13°C (55°F) at the start of April to approximately 19°C (66°F) by the end. Nights are cold, with lows typically ranging from 3°C (37°F) to 9°C (48°F).
Average temperatures in April
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 April
Historical weather for Iiyama in April
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 April
Based on 20 years of weather observations (2006-2026), these are the most extreme conditions recorded in Iiyama.
- Iiyama recorded its highest April temperature of 28°C (82°F) on April 21, 2018.
- The lowest daytime temperature in April was 4°C (39°F), recorded on April 7, 2012.
- Nighttime temperatures dropped to -2°C (28°F) on April 8, 2012, marking the coldest April night on record.
- The heaviest April precipitation occurred on April 9, 2024, when 60 mm (2.4 in) of precipitation fell.
Best Places in Japan in April
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in April →
perfect weather
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tolerable
unpleasant
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What to Wear in Iiyama in April
The weather can swing between comfortable and chilly in April, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Expect heavy rainfall, so bring good rain protection and waterproof bags. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Iiyama in April
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.
