Ontario 氣候 and Average 天氣
氣候 of Ontario: average temperatures, rainfall and seasons month by month.
氣候 in Ontario month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| 月份 | Avg high | Avg low | 雨fall | Rating |
|---|---|---|---|---|
| 一月 | -13° | -22° | 25 mm | ★★☆☆☆ |
| 二月 | -9° | -20° | 37 mm | ★★☆☆☆ |
| 三月 | -4° | -17° | 41 mm | ★★☆☆☆ |
| 四月 | 5° | -7° | 58 mm | ★★☆☆☆ |
| 五月 | 15° | 3° | 50 mm | ★★★★☆ |
| 六月 | 22° | 10° | 71 mm | ★★★★☆ |
| 七月 | 25° | 14° | 81 mm | ★★★★☆ |
| 八月 | 23° | 12° | 80 mm | ★★★★☆ |
| 九月 | 20° | 9° | 65 mm | ★★★★☆ |
| 十月 | 11° | 3° | 69 mm | ★★★☆☆ |
| 十一月 | -0° | -5° | 52 mm | ★★☆☆☆ |
| 十二月 | -7° | -15° | 52 mm | ★★☆☆☆ |
氣候 type: Subarctic. 來源： Open-Meteo archive (ERA5).
Recent extremes in Ontario
高est and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Ontario compares，天氣為nearby places
Annual averages, and the difference against Ontario.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Lake Superior | 425 km | 3°C | +1°C warmer | 790 mm |
| Isle Royale National Park | 429 km | 6°C | +3°C warmer | 761 mm |
| Porcupine Mountains Wilderness State Park | 589 km | 7°C | +5°C warmer | 902 mm |
氣候 by city in Ontario
3 cities mapped in this atlas
氣候 by state park in Ontario
1 state and provincial parks mapped in this atlas
最佳旅遊時間 Ontario
Go in 六月, 七月, 八月 and 九月. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: 二月, 十一月 and 十二月 - expect the least comfortable mix of heat, cold or rain.
What this means for Ontario
Today is about average for 十月. The forecast high of 11°C is in line，天氣為the 11°C typical for this month.
A 46% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in 六月至八月.
The gap between the warmest and coldest month averages 36°C.
What至pack, what至skip
- A warm mid-layer and gloves for early mornings and evenings
- Insulated outer layer, hat and boots，天氣為grip for ice
- If your dates are flexible, avoid 二月, 十一月 and 十二月 - historically the least comfortable months here.
摘要
Ontario is a province in 加拿大. Ontario is a Canadian province or territory. 人口約為15.6 million. 首都是Toronto.
目前氣溫為9°C (48°F) in Ontario，天氣為陰天. 體感溫度為6°C. 今天氣溫介於2°C至11°C. 降雨機率為46%. Sightseeing conditions score 7.4/10 - 良好.
最佳旅遊時間是Ontario is 六月, 七月, 八月 and 九月. 氣候為subarctic. 二月, 十一月 and 十二月 tend至be the least comfortable months. 七月 is the warmest month，天氣為average highs near 25°C, while 一月 is the coldest，天氣為lows near -22°C.
The closest major airport is Toronto Pearson International Airport (YYZ), about 944 km away. Nearby highlights include CN Tower and Algonquin Provincial Park.
簡單來說。 Today is about average for 十月. The forecast high of 11°C is in line，天氣為the 11°C typical for this month. The best window至be outside is roughly 3 PM至6 PM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Ontario today at 9.3/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Ontario
天氣 map for Ontario
Animated model layers. Pick a layer至load it.
Animated layers by 風y. For pin-level detail and nearby places, see the interactive map below.
Explore Ontario
Every topic we hold for this place, and the same topic for the places around it.
氣候 for related places
Frequently asked questions
Where is Ontario?
Ontario is a province in 加拿大. Its coordinates are 51.2538, -85.3232. It lies in 北美洲.
What is the weather like in Ontario現在?
It is currently 9°C (48°F)，天氣為陰天. 濕度 is 75% and wind is 11 km/h.
When is the best time至visit Ontario?
六月, 七月, 八月 and 九月 offer the most comfortable conditions in Ontario, which has a subarctic climate. 二月, 十一月 and 十二月 are usually the hardest months for outdoor plans.
What time zone is Ontario in?
Ontario observes America/Toronto (UTC-04:00). The local time is 4:41 PM.
How many people live in Ontario?
Ontario has a population of approximately 15.6 million.
What is the nearest airport至Ontario?
The closest airports are Toronto Pearson International Airport (YYZ), 944 km away.
What are the top things至do in Ontario?
Popular options include CN Tower and Algonquin Provincial Park.
What places are in Ontario?
Ontario covers 4 places in this atlas, including Ottawa, Toronto, Algonquin Provincial Park and Niagara Falls, Ontario.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (ca-provinces) - coordinates, hierarchy and facts. |
|---|---|
| 預報 and observations | Open-Meteo (ECMWF and national models). |
| 空氣品質 and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| 氣候 averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated 十月 21, 2026 at 4:41 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
