Average annual temperature is 11.6 °C
Absolute maximum temperature: 35.2 °C
Absolute minimum temperature: -9.9 °C
Number of sunny days: 109 days
Number of rainy days: 229 days
Number of snow days: 27 days
Look at detailed online map of Iiyama Shi
* Weather data for Iiyama Shi Japan is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 9.9 | 11.9 | 18.3 | 23.0 | 28.7 | 26.8 | 31.1 | 35.2 | 33.3 | 21.9 | 22.9 | 14.7 |
| Average daytime temperature (°C) | 2.2 | 2.6 | 9.9 | 15.1 | 18.7 | 22.5 | 27.4 | 32.5 | 26.9 | 17.1 | 12.8 | 7.0 |
| Average temperature (°C) | -1.0 | -0.4 | 4.4 | 9.4 | 13.5 | 18.3 | 23.2 | 26.5 | 22.1 | 12.3 | 8.0 | 2.3 |
| Average night temperature (°C) | -3.4 | -2.9 | 0.3 | 5.0 | 9.5 | 15.2 | 19.8 | 22.5 | 18.9 | 8.5 | 4.5 | -1.4 |
| Absolute minimum temperature (°C) | -9.4 | -5.8 | -4.7 | -1.3 | 1.1 | 10.3 | 15.9 | 19.9 | 12.2 | 4.7 | -4.3 | -9.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.7 | 14.4 | 13.5 | 12.4 | 11.2 | 10.2 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.9 | 4.9 | 7.8 | 8.2 | 8.7 | 7.6 | 9.6 | 11.4 | 8.4 | 8.4 | 6.4 | 5.8 |
| Precipitation (mm) | 318 | 254 | 118 | 152 | 199 | 211 | 126 | 35 | 135 | 103 | 237 | 296 |
| Sunny days | 3 | 5 | 16 | 12 | 12 | 5 | 10 | 12 | 6 | 11 | 10 | 7 |
| Rainy days | 14 | 13 | 15 | 18 | 19 | 25 | 21 | 19 | 24 | 20 | 20 | 21 |
| Snow days | 14 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Iiyama Shi during the most sunny months:
The largest precipitation sum in Iiyama Shi is at