Is Iiyama hot in July?
Days are typically warm at 29.8°C, while nights average 20.2°C.
Japan · 1991–2020 normal
Iiyama in
July.
Typical July weather in Iiyama: 29.8°C by day, 20.2°C at night, 145 mm of rain over 14 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high29.8°C
Typical low20.2°C
Rain145 mm
Wet days14
In the year-round weather comparison, July scores 46 out of 100 (May leads the year at 78). Daylight is calculated as 14 h 27 from latitude 36.85°. Open-water sea temperature is 23.4°C (37 km from the place centre).
July at a glance
What is Iiyama like in July?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 145 mm across about 14 wet days.
How much daylight is there?
There are about 14 h 27 between sunrise and sunset at mid-month, calculated from the place latitude.
Is July a good time to visit?
July ranks 7 of 12 in our weather comparison; May ranks first.
Event window
Warm sea in July
The nearest open-water NOAA OISST 1991–2020 cell averages 23.4°C in July. A sheltered bay can run warmer than that open-water cell.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 1861838
- NOAA station
- JA000047610 · NAGANO
- Station distance
- 25.2 km from the place centre
- Coverage
- Good coverage · 18 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Iiyama is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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