Next 24 hours

US AQI

41Now
40
39
3911 AM
38
37
372 PM
37
37
385 PM
39
39
398 PM
38
37
3611 PM
35
33
332 AM
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315 AM
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31

Air quality outlook

Worst hour each day

Today45Good
Sat 1037Good
Sun 11500Hazardous
Mon 1247Good
Tue 1335Good

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

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About Saint John weather

Saint John is in Saint John County, New Brunswick, Canada at 45.27°, -66.06°. Right now it’s 4° and partly cloudy; today’s high is 12° with a 32% chance of rain.

New Brunswick occupies the transition zone between the maritime climate of the Atlantic coast and the continental climate of inland Quebec, creating noticeable weather differences across the province. Coastal areas enjoy moderated temperatures year-round, while the interior Saint John River valley experiences colder winters and warmer summers. The province averages around 1,100 mm of precipitation annually.