Alliston in December
3.7out of 10
Not the best time
Cold: highs around 0°C. Frequent rain: about 11 rainy days.
0°CAvg high
-6°CAvg low
11Rainy days (58 mm)
8:42 hDaylight
07:55Sunrise · 16:37 Sunset
Why this score
- Cold: highs around 0°C
- Frequent rain: about 11 rainy days
- Nights fall to about -6°C
What to wear and pack
- Winter coat, hat and scarf
- Rain jacket or compact umbrella
- Gloves for freezing mornings
How reliable is the forecast?
Rain in December varies a lot between years (±3.2 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -2°C | -11°C | 56 mm | 10 | – | – | 3.8 |
| February | -1°C | -10°C | 46 mm | 8 | – | – | 4.0 |
| March | 4°C | -5°C | 54 mm | 10 | – | – | 4.5 |
| April | 12°C | 2°C | 73 mm | 11 | – | – | 5.9 |
| May | 19°C | 8°C | 81 mm | 11 | – | – | 7.1 |
| June | 24°C | 13°C | 83 mm | 11 | – | – | 7.6 |
| July | 26°C | 16°C | 75 mm | 11 | – | – | 7.6 |
| August | 25°C | 15°C | 76 mm | 10 | – | – | 7.7 |
| September | 21°C | 11°C | 71 mm | 9 | – | – | 7.7 |
| October | 14°C | 5°C | 72 mm | 11 | – | – | 6.2 |
| November | 7°C | -1°C | 67 mm | 11 | – | – | 5.0 |
| December | 0°C | -6°C | 58 mm | 11 | – | – | 3.7 |
Frequently asked questions
How hot is Alliston in December?
Daytime highs average 0°C and nights about -6°C.
When is the best time to visit Alliston?
The best months are August, September, June, July.