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Saint John 15-day weather forecast

Updated: 21:20

In the first week, Saint John can expect around 5–12 °C with 1 wet day (at least 1 mm). The second week looks warmer, by about 4 °C: around 12–16 °C on average. Warmest day: Friday (6 Nov) at 18 °C; coldest night: Sunday (1 Nov) at 0 °C.

Our primary data source is unavailable right now, so a shorter forecast is shown temporarily.

Week 1 – detailed forecast

Friday • 10.30
9° / 16°
🌤️
mostly clear
Precipitation 0.0 mm
Chance of rain —
Wind (max) 22 km/h
Reliability reliable
Saturday • 10.31
2° / 9°
☀️
clear
Precipitation 0.0 mm
Chance of rain —
Wind (max) 27 km/h
Reliability reliable
Sunday • 11.01
0° / 10°
☀️
clear
Precipitation 0.0 mm
Chance of rain —
Wind (max) 25 km/h
Reliability reliable
Monday • 11.02
5° / 15°
🌤️
mostly clear
Precipitation 0.0 mm
Chance of rain —
Wind (max) 20 km/h
Reliability moderate
Tuesday • 11.03
5° / 9°
☁️
overcast
Precipitation 0.0 mm
Chance of rain —
Wind (max) 12 km/h
Reliability moderate
Wednesday • 11.04
7° / 11°
☁️
overcast
Precipitation 7.0 mm
Chance of rain —
Wind (max) 20 km/h
Reliability moderate
Thursday • 11.05
9° / 15°
🌤️
partly cloudy
Precipitation 0.0 mm
Chance of rain —
Wind (max) 16 km/h
Reliability moderate

Week 2 – indicative trend

Friday • 11.06
10° / 18°
🌧️
heavy rain
Precipitation 32.4 mm
Chance of rain —
Wind (max) 31 km/h
Reliability trend only
Saturday • 11.07
15° / 16°
🌧️
heavy rain
Precipitation 60.6 mm
Chance of rain —
Wind (max) 17 km/h
Reliability trend only
Sunday • 11.08
11° / 15°
🌤️
mostly clear
Precipitation 0.4 mm
Chance of rain —
Wind (max) 6 km/h
Reliability trend only

How accurate is a 15-day forecast?

Weather models are reliable for the first few days, but small errors grow over time. That is why every day on this page is marked: days 1–3 are reliable, days 4–7 moderately so, and from day 8 onwards the forecast shows the direction of travel – a warmer or cooler spell, a wetter period – rather than the exact temperature of a given day.

In depth: how accurate are weather forecasts?

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Frequently asked questions

What will the weather be like in Saint John over the next 15 days?

In the first week, Saint John can expect around 5–12 °C with 1 wet day (at least 1 mm). The second week looks warmer, by about 4 °C: around 12–16 °C on average. Warmest day: Friday (6 Nov) at 18 °C; coldest night: Sunday (1 Nov) at 0 °C.

Will it rain in Saint John in the next 15 days?

The models show at least 1 mm of rain on 3 of the next 10 days. The wettest day looks like Saturday (7 Nov) with about 60.6 mm. From day 8 onwards this is a trend, not an exact daily figure.

How reliable is a 15-day forecast?

Days 1–3 are usually reliable and days 4–7 moderately so. Beyond that the forecast shows the trend rather than exact daily values — check back each day.