Next 24 hours

US AQI

47Now
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43
421 AM
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374 AM
35
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337 AM
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3610 AM
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431 PM
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454 PM
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447 PM
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Air quality outlook

Worst hour each day

Today67Moderate
Thu 845Good
Fri 945Good
Sat 1086Moderate
Sun 1162Moderate

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

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About London weather

London is in Middlesex County, Ontario, Canada at 42.98°, -81.23°. Right now it’s 17° and mostly clear; today’s high is 23° with a 20% 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.