Alliston Weather in December
Alliston in December
The short of it: Alliston in December averages a high of 1 °C (33 °F) and a low of -6 °C (22 °F), with 58 mm (2.3 in) of rain and about 8 h 53 min of daylight. Rated 1 of 5 for a visit; the best months are June and September. Source: TerraClimate climate normals, 1991–2020.
Average high 1° · low -6° · rain 58 mm · daylight 8 h 53 min
✦ Travel with care for a visit · best months: June & September
Thirty years of records give Alliston an average December high of 1°, a low of -6° and some 58 mm of rain. Highs fall 7° against November, to near 1°; nights run about -6°. Rain is modest, about 58 mm, the 10th wettest month. Snow lies on the ground; mind the passes.
The sun is up for about 8 h 53 min in mid-December, 40 minutes less than a month before.
For the traveller: pack a heavy coat, gloves and a scarf. The Almanac rates December 1 of 5 for a visit; the finest months here are June and September.
Against its neighbours, Alliston runs about middling and drier than most in December. Innisfil, 24 km to the NE, sees much the same highs.
December in Alliston, by the numbers
- Warmth rank
- 10th warmest of 12
- Rain rank
- 10th wettest of 12
- Versus November
- 7° colder, 16 mm less rain
- Versus January
- 4° warmer
- Day–night spread
- 6°
- Snow season
- Nov–Apr
- Daylight, mid-month
- 8 h 53 min
- Average wind
- 17 km/h