Heavy rain to soak Waterloo Region before double‑digit warmth this weekend
Posted Mar 4, 2026 05:52:30 AM.
Last Updated Mar 4, 2026 10:54:09 AM.
Waterloo Region is heading into one of its wettest stretches in weeks, with a surge of mild air set to collide with a series of moisture‑laden systems, delivering steady rain beginning Thursday and continuing into the weekend.
Wednesday brings a brief window of sunshine and mild, stable weather. Early morning fog patches will lift to mainly sunny skies, with a high near 8 C. Overnight temperatures dip to –3 C under partly cloudy skies.
This quiet stretch won’t last long.
570 NewsRadio Weather Specialist Denise Andreacchi said a more active pattern begins to build late Wednesday night as a system approaches from the southwest, setting the stage for a significant change.
Clouds will thicken in southern Ontario through Thursday morning, followed by showers and then periods of steady rain late in the day. Forecasters expect 5–10 millimetres of rainfall between Thursday afternoon and Thursday night, driven by persistent easterly winds of 20–50 km/h.
Temperatures will hover around 5 C during the day and remain above freezing overnight, keeping all precipitation as rain.
Friday will be mostly cloudy with occasional sunny breaks, but the unsettled pattern continues. More showers are expected late in the day as another system moves through. The high in Waterloo Region reaches 7 C, with a low of 4 C.
Saturday: Warmest day in weeks, but windy and wet
Saturday stands out as the warmest day in the forecast, Andreacchi said, and potentially one of the warmest days Waterloo Region has seen in months. Temperatures are expected to climb to 15 C, well into the double digits and far above seasonal norms.
But the warmth comes with a tradeoff: scattered showers and strong southwest winds of 30–50 km/h will make for a blustery, unsettled day.
The weekend ends on a calmer note. Sunday brings a mix of sun and cloud with a high near 12 C, offering a brief reprieve before another round of spring‑like systems arrives next week.
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