Air quality index52Moderate

Acceptable for most people; unusually sensitive people should take it easier outdoors.

Next 24 hours

US AQI

44Now
52
59
641 AM
69
75
724 AM
69
67
617 AM
56
51
4710 AM
43
39
401 PM
41
41
404 PM
39
37
367 PM
35
33

Air quality outlook

Worst hour each day

Today52Moderate
Thu 875Moderate
Fri 935Good
Sat 1059Moderate
Sun 1178Moderate

From our air-quality forecast models (GEOS-CF / GEFS aerosols). AQI uses the US EPA scale.

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About Ottawa weather

Ottawa is in Ottawa, Ontario, Canada at 45.41°, -75.70°. Right now it’s 14° and mostly cloudy; today’s high is 16° with a 35% chance of rain.

Ontario's climate is as vast and varied as the province itself. Southern Ontario enjoys a humid continental climate moderated by the Great Lakes, producing warm, humid summers and cold winters. Northern Ontario experiences subarctic conditions with long, frigid winters and short, cool summers.