Summer-like temperatures are set to leave Lethbridge this week as the region prepares for a significant shift toward cooler, wet weather. While the area is enjoying a warm spell on Wednesday, Environment Canada reports that conditions will deteriorate quickly as the week concludes.
As of 11:00 AM on Wednesday, May 13, 2026, conditions at the Lethbridge Airport were recorded at 23°C. Forecasters expect the temperature to climb to a high of 27°C today, accompanied by strong southwest winds gusting up to 60 km/h. Residents should be prepared for rain to move in Wednesday night, with 5 to 10 mm of precipitation expected and wind gusts reaching 80 km/h near midnight.
Thursday will bring some relief as the rain ends early in the morning and skies begin to clear, though it will remain breezy with wind gusts potentially hitting 90 km/h. Temperatures are expected to drop to a high of 18°C.
The cooldown will intensify heading into the weekend. Saturday is forecast to reach a high of 12°C, while Sunday will be noticeably colder with temperatures peaking at 8°C or 11°C, according to varying reports from Environment Canada and The Weather Network. Environment Canada forecasts a sunny Saturday with a 30% chance of flurries or rain showers on Sunday, while The Weather Network calls for a 40 to 60 percent chance of showers on both weekend days.
Overnight temperatures are also expected to dip to near or below freezing, with lows dropping to minus 1°C on Saturday night and 0°C on Sunday night. These temperatures fall below the typical mid-May average for Lethbridge, where the normal low is 4°C.
