Climate almanac
Iwanai
Hokkaido, Japan · 42.97°, 140.51°
What is the weather like in Iwanai in December?
In December, Iwanai is typically 32°F (0°C) during the day and 25°F (-4°C) at night. The month brings about 6.4 in (163 mm) of precipitation in total. Snowfall averages about 37 in (938 mm) over the month.
- Average high32°F (0°C)
- Average low25°F (-4°C)
- Precipitation6.4 in (163 mm)
- Clear or mostly clear days1
- Snowfall37 in (938 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)