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Best Time for the Hokkaidō Loop
Sweet spot: March, April, May — computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
Lavender peaks at Furano mid-July — Biei's patchwork hills glow; book that week solid months ahead.
Serious snow country: this drive becomes a ski trip — the loop as planned is a summer route.
| Month | Temp | Rain | Daylight | |
|---|---|---|---|---|
| January | -20.5–2.5°C | 85 mm | 9.1 h | ❄ |
| February | -21.0–3.1°C | 70 mm | 10.2 h | ❄ |
| March | -19.0–9.8°C | 64 mm | 11.6 h | ❄ |
| April | -8.8–20.2°C | 60 mm | 13.2 h | ❄ |
| May | -2.8–26.6°C | 74 mm | 14.5 h | ❄ |
| June | 2.4–29.9°C | 83 mm | 15.2 h | ❄ |
| July | 6.9–29.9°C | 123 mm | 14.9 h | |
| August | 9.0–31.5°C | 156 mm | 13.8 h | |
| September | 4.0–29.2°C | 130 mm | 12.3 h | |
| October | -2.8–22.8°C | 111 mm | 10.8 h | ❄ |
| November | -11.6–16.6°C | 115 mm | 9.5 h | ❄ |
| December | -17.0–9.0°C | 112 mm | 8.8 h | ❄ |