Calgary weekend weather
This weekend in Calgary, Alberta, model by model. Weekend forecasts are far enough out that the models often split - so we show you where.
Weekend
The models centre on about 22° across the weekend. Agreement is high - unusually solid for this far out.
Tomorrow
2026-09-19 — every model, side by sideEnv. CanadaGEM model
20°
Clear
EuropeanECMWF
20°
Partly cloudy
AmericanNOAA GFS
22°
Cloudy
All 3 models land within 2° of each other for this day — that is a forecast you can plan on.
Sun
2026-09-20 — every model, side by sideEnv. CanadaGEM model
24°
Clear
EuropeanECMWF
23°
Mostly clear
AmericanNOAA GFS
25°
Cloudy
All 3 models land within 2° of each other for this day — that is a forecast you can plan on.
Where the models disagree
temperature and rain, judged separatelyThe 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.
Common questions
Will it rain this weekend?
The models are not currently showing a high weekend rain risk, and they broadly agree with each other.
How reliable is a weekend forecast?
It depends how far away the weekend is. Forecast error grows steadily with lead time, so a Saturday forecast made on Friday is far stronger than one made the previous Monday. The honest signal is model agreement: when they converge the forecast is solid, and when they spread the weekend is genuinely uncertain.