Iiyama Weather in July
With daytime temperatures of 28°C (82°F) and nighttime lows of 19°C (66°F), July in Iiyama brings high temperatures during the day. It is also the wettest month of the year, so pack an umbrella.
Rainfall in Iiyama in July
As part of the rainy season, Iiyama sees around 21 days of rain in July, with an average of 257 mm (10 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.
Temperature in Iiyama in July
July in Iiyama sees highs of 28°C (82°F) and lows of 19°C (66°F) overnight. July is part of the summer season. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Iiyama in July
You can expect a moderate amount of sunlight, with approximately 154 hours. Even though this month is part of the wet season, you can still see the sun occasionally.If your ideal day consists of dry skies and pleasant temperatures, May typically offers the best circumstances for Iiyama.
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 July
Min Temperature
19°C (66°F)
Max Temperature
28°C (82°F)
Chance of Rain
70%
Precipitation
257 mm (10 in)
Rainy days
21 days
Humidity
80% *
Sunshine
154 hours *
Percentage Sunshine
*
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Iiyama typically rise from around 26°C (79°F) at the start of July to approximately 30°C (86°F) by the end. Nights are warm, with lows typically ranging from 19°C (66°F) to 23°C (73°F).
Average temperatures in July
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 July
Historical weather for Iiyama in July
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 July
According to our 19 years of weather records for Iiyama, the following extremes were recorded between 2006 and 2025.
- The warmest day in July was on July 13, 2015, with a maximum of 36°C (97°F).
- On July 18, 2006, Iiyama saw its coldest July day with temperatures maxing out at 20°C (68°F).
- The lowest overnight temperature recorded in July was 15°C (59°F) (July 2, 2008).
- The heaviest July precipitation occurred on July 1, 2017, when 115 mm (4.5 in) of precipitation fell.
Best Places in Japan in July
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in July →
perfect weather
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tolerable
unpleasant
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What to Wear in Iiyama in July
Warm temperatures in July make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. 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 July
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.
