- If your flight has been delayed or cancelled
- Claim up to £520 compensation per passenger
- No win, no fee. All airlines & countries
Ontario weather in December 2025
Expect daytime maximum temperatures of 0°C in Ontario, Canada in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 13 days with some rainfall and typically 72 mm of rainfall in the month, which might fall as snow.
- 0°C max day temperature
0 - 2 hours of sunshine per day
- 13 days with some rainfall
13 - -6°C min night temperature
-6 - 9 hours of daylight per day
9 - No heat & humidity
0 - 72 mm of monthly rainfall
72 - 1 (Low) UV index
1 - 5°C sea temperature
5
More about Ontario
- Overview
- Best time to visit
- Weather by month
- 5-day weather forecast
- Destinations
- Travel advice
- Deals & discounts
Ontario by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Ontario
The December weather guide for Ontario (Toronto) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Ontario destinations
Below are average maximum temperatures at popular countries, regions and places in Ontario in December. Select a holiday destination to see more weather parameters.
All Ontario destinations
- Hamilton
- Kenora
- Kingston
- Moosonee
- Niagara Falls
- North Bay
- Ottawa
- Peawanuk
- Sault Ste. Marie
- Sudbury
- Thunder Bay
- Timmins
- Toronto
- Windsor
Metric (°C / mm) | Imperial (°F / inches)
More about Ontario
How cold is it in Ontario in December?
Daytime temperatures usually reach 0°C in Toronto, Ontario in December, falling to -6°C at night.
How sunny is it in Ontario in December?
There are normally 2 hours of bright sunshine each day in Toronto, Ontario in December - that's 26% of daylight hours.
Is the sea cold around Ontario in December?
The average sea temperature around Toronto, Ontario in December is 5°C.
Does it rain in Ontario in December?
There are usually 13 days with some rain in Toronto, Ontario in December and the average monthly rainfall is 72mm. Rain may fall as snow in this month.
Ontario December sunrise & sunset times
Browse the sunrise and sunset times for Ontario in December 2025. Select a month to view Ontario sunrise and sunset times for the next 12 months. The Ontario sunrise and sunset times shown below are for Toronto.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st December 2025 | 07:32 | 16:42 |
| Tuesday, 16th December 2025 | 07:45 | 16:42 |
| Wednesday, 31st December 2025 | 07:51 | 16:51 |
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
Explore holidays in the sun for less
- Beach holidays
- Family holidays
- City breaks
- Summer holidays
- Winter sun holidays
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- Airport parking deals
- TUI
- Jet2holidays
- easyJet holidays
- Love Holidays
- January sales
Airport parking
- Manchester Airport
- Stansted Airport
- Bristol Airport
- Luton Airport
- Birmingham Airport
- Edinburgh Airport
- Gatwick Airport
- Glasgow Airport
- Newcastle Airport
Airport lounges
- Manchester Airport
- Birmingham Airport
- Bristol Airport
- Edinburgh Airport
- Glasgow Airport
- Heathrow Airport
- Newcastle Airport
- Stansted Airport
- Gatwick Airport