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Best Time for the The Alaska Highway
Sweet spot: April, May, September — computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
The midnight-sun window: every service stop open, bears and bison on the verges, and Liard's hot pools after long days.
Winter driving is expedition territory — -40° cold snaps and short light; most travelers keep it to June–September.
| Month | Temp | Rain | Daylight | |
|---|---|---|---|---|
| January | -45.2–1.5°C | 37 mm | 6.1 h | ❄ |
| February | -42.3–2.2°C | 24 mm | 8.6 h | ❄ |
| March | -40.3–6.8°C | 31 mm | 11.3 h | ❄ |
| April | -26.2–17.6°C | 30 mm | 14.3 h | ❄ |
| May | -14.2–24.8°C | 47 mm | 17.0 h | ❄ |
| June | -2.5–29.5°C | 82 mm | 18.8 h | ❄ |
| July | 1.1–29.5°C | 84 mm | 18.0 h | ❄ |
| August | -1.6–28.5°C | 67 mm | 15.5 h | ❄ |
| September | -8.5–23.9°C | 51 mm | 12.5 h | ❄ |
| October | -24.1–18.0°C | 45 mm | 9.7 h | ❄ |
| November | -38.3–3.9°C | 38 mm | 6.9 h | ❄ |
| December | -42.2–1.4°C | 34 mm | 5.2 h | ❄ |