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St. John, NB Weather Forecast
St. John, NB Weather Forecast Dated: 520 AM Sat Sep 12 2026
Expect a cool pattern with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.
Saturday, September 12, 2026
Mid-Morning
14°C 57°F
Sunny
Mid-Afternoon
19°C 66°F
Partly Cloudy
Early-Evening
13°C 56°F
Partly Cloudy
Refreshing around 19°C 66°F, sunny in the morning, becoming partly cloudy through the afternoon and evening, with increasing humidity and steady pressure. Winds turning from the NNW to the SSW at 11 km/h 7 mph.
Sunday, September 13, 2026
Mid-Morning
14°C 57°F
Overcast
Mid-Afternoon
14°C 58°F
Light Rain
Early-Evening
13°C 56°F
Light Showers
Mildly cool near 14°C 58°F, clouds and showers taking over for the afternoon and evening, with increasing humidity and barometric pressure falling. Winds switching from the S to the SSE at 9 km/h 6 mph.
Monday, September 14, 2026
Mid-Morning
15°C 60°F
Scattered Showers
Mid-Afternoon
20°C 67°F
Sunny
Early-Evening
15°C 59°F
Partly Cloudy
Comfortable at 20°C 67°F, locally heavy downpours at times, with lower humidity and barometric pressure rising. Winds moving from the NW to the NNW at 18 km/h 11 mph. Gusts up to 35 km/h 22 mph.
Tuesday, September 15, 2026
Mid-Morning
9°C 49°F
Sunny
Mid-Afternoon
17°C 62°F
Sunny
Early-Evening
11°C 52°F
Partly Cloudy
Cool with a high near 17°C 62°F, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure.
Wednesday, September 16, 2026
Mid-Morning
13°C 55°F
Overcast
Mid-Afternoon
16°C 61°F
Overcast
Early-Evening
14°C 57°F
Overcast
Refreshing around 16°C 61°F, overcast throughout the day, with steady humidity and steady pressure. Winds swinging from the SSW to the SW at 17 km/h 11 mph. Gusts up to 43 km/h 27 mph.
Thursday, September 17, 2026
Mid-Morning
15°C 58°F
Overcast
Mid-Afternoon
17°C 62°F
Overcast
Early-Evening
11°C 51°F
Light Showers
Mildly cool near 17°C 62°F, dry most of the day, with showers developing late, with steady humidity and steady pressure. Winds shifting from the NW to the N at 10 km/h 6 mph.
Friday, September 18, 2026
Mid-Morning
8°C 47°F
Partly Cloudy
Mid-Afternoon
10°C 50°F
Scattered Showers
Early-Evening
9°C 49°F
Light Rain
Chilly near 10°C 50°F, periods of heavy rain and gusty conditions, with increasing humidity and barometric pressure falling.
Saturday, September 19, 2026
Mid-Morning
10°C 49°F
Light Fog
Mid-Afternoon
12°C 53°F
Light Showers
Early-Evening
11°C 52°F
Drizzle
Crisp with a high near 12°C 53°F, clouds and showers taking over for the afternoon and evening, with steady humidity and steady pressure.
Sunday, September 20, 2026
Mid-Morning
11°C 51°F
Light Showers
Mid-Afternoon
11°C 52°F
Overcast
Early-Evening
12°C 52°F
Partly Cloudy
Brisk around 11°C 52°F, morning showers, giving way to clearing skies, with lower humidity and steady pressure. Winds turning from the NE to the N at 11 km/h 7 mph.
Monday, September 21, 2026
Mid-Morning
9°C 49°F
Sunny
Mid-Afternoon
16°C 61°F
Sunny
Early-Evening
12°C 53°F
Sunny
Mildly cool near 16°C 61°F, sunny throughout the day, with steady humidity and barometric pressure rising. Winds switching from the NNW to the ENE at 10 km/h 6 mph.
Tuesday, September 22, 2026
Mid-Morning
9°C 49°F
Sunny
Mid-Afternoon
14°C 57°F
Sunny
Early-Evening
10°C 50°F
Sunny
Chilly near 14°C 57°F, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling.
Wednesday, September 23, 2026
Mid-Morning
11°C 51°F
Sunny
Mid-Afternoon
17°C 62°F
Sunny
Early-Evening
13°C 56°F
Cloudy
Cool with a high near 17°C 62°F, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling.
Thursday, September 24, 2026
Mid-Morning
13°C 56°F
Sunny
Mid-Afternoon
14°C 57°F
Scattered Showers
Early-Evening
13°C 56°F
Scattered Showers
Brisk around 14°C 57°F, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds moving from the S to the WNW at 15 km/h 9 mph. Gusts up to 39 km/h 24 mph.
Friday, September 25, 2026
Mid-Morning
8°C 47°F
Sunny
Mid-Afternoon
14°C 57°F
Sunny
Early-Evening
11°C 52°F
Partly Cloudy
Cool and brisk at 14°C 57°F, sunny throughout the day, with steady humidity and barometric pressure rising. Winds swinging from the WNW to the SSW at 12 km/h 8 mph.
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