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Every Canadian forecast, compared
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CheckWeather CASaint John
Forecast confidence: High · models disagree by 1°C

Saint John weather

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Light drizzle,warmer tomorrow

Env. Canada, the European and the American model agree on a high near 14° in Saint John today. Tomorrow looks cloudy around 21°, with a 12% chance of rain.

14°11°
21°10°
20°12°
16°
21°14°
22°13°
Todaymodels agreeTomorrowmodels agreeTuesdaymodels agreeWednesdaysplit ±2°Thursdaysplit ±4°Fridaysplit ±8°
Env. CanadaGEM model
14°
Light drizzle
Today 14°·Low 12°·Rain 63%
EuropeanECMWF
14°
Heavy drizzle
Today 14°·Low 12°·Rain 89%
AmericanNOAA GFS
13°
Light drizzle
Today 13°·Low 10°·Rain 42%

The weather map: all three models at once

Env. Canada, European, American side by side around Saint John and nearby towns.Live rain radar →
Loading the three model maps…

Next 14 hours

consensus of the three models

14-day forecast

where the models agree, and where they split
Today
Light drizzle
14° 11°
models agree
Tomorrow
Cloudy
21° 10°
models agree
Tue
Rain
20° 12°
models agree
Wed
Cloudy
16°
±2°
Thu
Rain
21° 14°
±4°
Fri
Light drizzle
22° 13°
±8°
Sat
Mostly clear
19° 11°
±5°
Sun
Drizzle
19° 13°
±4°
Mon
Light drizzle
18° 12°
±4°
Tue
Rain
16° 11°
±5°
Wed
Drizzle
19° 13°
±2°
Thu
Cloudy
22° 11°
models agree
Fri
Cloudy
20° 10°
±2°
Sat
Cloudy
17°
models agree

Saint John is a town of about 72,000 people in New Brunswick, sitting at 45.3°N in a temperate climate zone. Env. Canada, European, American each forecast Saint John with their own physics, so we line all three up and flag where they disagree. Nearby towns include Uptown Saint John, North End, Saint John West.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in Canada before you trust any single number.

Which forecast is most accurate in Saint John?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
European logo
European ★ Best
83
/100rank #1
76±1.3°C96±1.9 km/t8290% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
62
/100rank #2
55±2.5°C93±3.5 km/t4771% hitNOAA / NCEP (United States)College Park, Maryland, USA
EC
Env. Canada
59
/100rank #3
53±2.6°C92±4.2 km/t4268% hitEnvironment and Climate Change CanadaDorval, Québec, Canada

The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1302 cities. Lower error means a higher score. See which forecast model is most accurate in Canada, how we measure forecast accuracy, or which model each weather app uses.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±1°13° to 14°±47%42% to 89% chance
Tomorrow±1°20° to 22°±5%7% to 12% chance
Tue±1°19° to 20°±40%10% to 50% chance
Wed±2°15° to 17°±46%4% to 50% chance
Thu±4°20° to 24°±6%81% to 87% chance

The models often agree on temperature and still split on rain — and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in Saint John

today, local time
Sunrise
06:52
Sunset
19:52
Daylight
13h 0m

Common questions

What's the weather in Saint John today?
On this page we show what Env. Canada, European, American each forecast for Saint John today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Saint John today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from Env. Canada, European, American for Saint John and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Saint John?
Over the last 30 days, the European model has been the most accurate for Saint John (CheckWeather Score 83/100), ahead of the American at 62. We grade every model against the recorded weather. See the CA accuracy scoreboard for the full method.

Nearby

More CA weather