See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
19°
Clear
Feels Like: 18°
Min: 17°
Max: 20°
The next few hours will be clear, with today reaching 20°C and dropping to 16°C. The coming days will be partly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:07
Sunrise
18:50
Sunset
Moon
Waxing Gibbous
18:22
Moonrise
05:23
Moonset
Daily Forecast
Today
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Air Quality Data Available
Upgrade to access real-time air quality data for Saint John.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Saint John.
View stargazing scoreWeather in Saint John today, September 25, 2026
Saint John is set for a fine, sunny day on September 25, 2026, with only limited interruptions to the clear sky. The early hours look particularly favourable for being outside. The first half of the day looks overcast, as cloud amounts reach about 67% around 10:00. Brighter weather, if it comes, waits until later.
The temperature range runs from about 17°C up to 20°C. Relative humidity sits between 71% and 90%, reaching its peak around 10:00. Expect gentle winds, highest near 23:00 at 5.8 km/h.
Expect persistent cloud later on, with amounts around 100% by 20:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 26.6 km on average, though it can drop toward 16.5 km in thicker cloud or showers. The sun rises at 07:07 and sets at 18:50, for a total of 11 hours 43 minutes of sunlight today.
Taken together, settled sunshine in Saint John on September 25, 2026 makes outdoor timing easier, with highs near 20°C.
Frequently asked questions about weather in Saint John
How warm does it get in Saint John?
The warmest month in Saint John is August, with average high temperatures of 19°C. The average temperature during this period is around 18°C.
How cold does it get in Saint John?
The coldest month in Saint John is January, with average low temperatures of 7°C. The average temperature during this period is around 9°C.
What is the wettest time of year in Saint John?
The wettest month in Saint John is November, with an average of 145mm of precipitation.
What is the driest time of year in Saint John?
The driest month in Saint John is July, with an average of 40mm of precipitation.
