See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
18°
Partly Cloudy
Feels Like: 11°
Min: 15°
Max: 30°
The next few hours will be overcast, with today reaching 30°C and dropping to 11°C. The coming days will be mostly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:36
Sunrise
18:52
Sunset
Moon
Waxing Crescent
11:30
Moonrise
20:23
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
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Weather in Saint John today, September 15, 2026
Saint John is set for a fine, sunny day on September 15, 2026, with only limited interruptions to the clear sky. The early hours look particularly favourable for being outside. Expect a grey start, with morning cloud around 100% by 03:00. Outdoor plans early on should not rely on bright skies.
Temperatures climb from an overnight low near 15°C toward a daytime high of about 30°C. Expect humidity between 24% and 71%, most humid near 07:00. Winds stay light, near 9.3 km/h by 17:00, so the day feels still more than breezy.
The afternoon keeps an overcast feel, as cloud reaches about 100% around 14:00. Outdoor plans may still want a flexible backup. Expect visibility around 16.1 km. Sunrise is at 06:36 and sunset at 18:52, giving 12 hours 15 minutes of sunlight today.
Overall, Saint John on September 15, 2026 favours outdoor plans under mostly open skies, with a comfortable high near 30°C.
Frequently asked questions about weather in Saint John
How warm does it get in Saint John?
The warmest month in Saint John is July, with average high temperatures of 28°C. The average temperature during this period is around 24°C.
How cold does it get in Saint John?
The coldest month in Saint John is January, with average low temperatures of -5°C. The average temperature during this period is around -3°C.
What is the wettest time of year in Saint John?
The wettest month in Saint John is May, with an average of 128mm of precipitation.
What is the driest time of year in Saint John?
The driest month in Saint John is December, with an average of 63mm of precipitation.
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