Ontario Klima and Average Vær
Klima of Ontario: average temperatures, rainfall and seasons month by month.
Klima in Ontario month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Måned | Avg high | Avg low | Regnfall | Rating |
|---|---|---|---|---|
| januar | -13° | -22° | 25 mm | ★★☆☆☆ |
| februar | -9° | -20° | 37 mm | ★★☆☆☆ |
| mars | -4° | -17° | 41 mm | ★★☆☆☆ |
| april | 5° | -7° | 58 mm | ★★☆☆☆ |
| mai | 15° | 3° | 50 mm | ★★★★☆ |
| juni | 22° | 10° | 71 mm | ★★★★☆ |
| juli | 25° | 14° | 81 mm | ★★★★☆ |
| august | 23° | 12° | 80 mm | ★★★★☆ |
| september | 20° | 9° | 65 mm | ★★★★☆ |
| oktober | 11° | 3° | 69 mm | ★★★☆☆ |
| november | -0° | -5° | 52 mm | ★★☆☆☆ |
| desember | -7° | -15° | 52 mm | ★★☆☆☆ |
Klima type: Subarctic. Kilde: Open-Meteo archive (ERA5).
Recent extremes in Ontario
Høyest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Ontario compares med 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 |
Klima by city in Ontario
3 cities mapped in this atlas
Klima by state park in Ontario
1 state and provincial parks mapped in this atlas
Beste tid å besøke Ontario
Go in juni, juli, august and september. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: februar, november and desember - expect the least comfortable mix of heat, cold or rain.
What this means for Ontario
Today is slightly warmer than average for september. The forecast high of 22°C is 2.5°C above the 20°C typical for this month.
A 45% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel.
Vindkast til 51 km/h will push high-sided vehicles on exposed roads and bridges.
Northern Hemisphere, so peak summer falls in juni til august.
The gap between the warmest and coldest month averages 36°C.
What til pack, what til skip
- Layers - the daily swing is 24°C, so mornings feel nothing like afternoons
- A warm mid-layer and gloves for early mornings and evenings
- A packable rain shell - 3 of the next 7 days carry a real chance of rain
- Avoid exposed ridgelines, small boats and rooftop viewpoints while gusts stay above 51 km/h.
- If your dates are flexible, avoid februar, november and desember - historically the least comfortable months here.
Sammendrag
Ontario is a province in Canada. Ontario is a Canadian province or territory. Befolkningen er rundt 15.6 million. Hovedstaden er Toronto.
Akkurat nå er det 21°C (70°F) in Ontario med klar himmel. Det føles som 17°C. I dag varierer temperaturen mellom 15°C til 22°C. Sannsynligheten for nedbør er 45%. Sightseeing conditions score 8.1/10 - gode forhold.
Beste tidspunkt å besøke Ontario is juni, juli, august and september. Klimaet er subarctic. februar, november and desember tend til be the least comfortable months. juli is the warmest month med average highs near 25°C, while januar is the coldest med 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.
Kort sagt. Today is slightly warmer than average for september. The forecast high of 22°C is 2.5°C above the 20°C typical for this month. The best window til be outside is roughly 6 PM til 9 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Ontario today at 8.5/10. Vindkast til 51 km/h will push high-sided vehicles on exposed roads and bridges.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Ontario
| Type | Province |
|---|---|
| Land | Canada |
| Kontinent | Nord-Amerika |
| Koordinater | 51°15′13.7″N 85°19′23.5″W (51.2538, -85.3232) |
| Capital | Toronto |
| Befolkning | 15.600.000 |
| Area | 1.076.395 km² |
| Tidssone | America/Toronto |
| Lokal tid | 8:05 PM (UTC-04:00) |
| Best months | juni, juli, august and september |
| Klima | Subarctic |
Vær map for Ontario
Animated model layers. Pick a layer til load it.
Animated layers by Vindy. 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.
Klima for related places
Frequently asked questions
Where is Ontario?
Ontario is a province in Canada. Its coordinates are 51.2538, -85.3232. It lies in Nord-Amerika.
What is the weather like in Ontario akkurat nå?
It is currently 21°C (70°F) med klar himmel. Luftfuktighet is 35% and wind is 23 km/h.
When is the best time til visit Ontario?
juni, juli, august and september offer the most comfortable conditions in Ontario, which has a subarctic climate. februar, november and desember 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 8:05 PM.
How many people live in Ontario?
Ontario has a population of approximately 15.6 million.
What is the nearest airport til Ontario?
The closest airports are Toronto Pearson International Airport (YYZ), 944 km away.
What are the top things til 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. |
|---|---|
| Værmelding and observations | Open-Meteo (ECMWF and national models). |
| Luftkvalitet and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Klima 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 september 30, 2026 at 8:05 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
