WXSIM Forecast for: Lethbridge Issued by: West Lethbridge Weather

Updated: Sunday, 20-Sep-2026 03:00 am

Rest of tonight Clear Sunday Sunny Sunday night Clear Monday Sunny Monday night Clear Tuesday Partly Cloudy Tuesday night Partly Cloudy Wednesday Partly Cloudy Wednesday night Partly Cloudy Thursday Partly Cloudy Low: 9° High: 24° Low: 8° High: 25° Low: 8° High: 24° Low: 10° High: 24° Low: 8° High: 23°                     SSE 12 km/h Gentle breeze SSW 6 km/h Light breeze S 9 km/h Light breeze SSW 10-24 km/h Moderate breeze SSW 10 km/h Light breeze SW 12-25 km/h Moderate breeze SW 8 km/h Light breeze SW 10-30→16-31 km/h Fresh breeze SW 11-27 km/h Moderate breeze W→NNE 4 km/h Light air UV: 5  Medium  UV: 5  Medium  UV: 4  Medium  UV: 4  Medium  UV: 4  Medium

Rest of tonight	Clear. Low 9°. Wind south-southeast around 12 km/h.
Sunday	Sunny. Warm. High 24°. UV index up to 5. Wind south-southwest around 6 km/h.
Sunday night	Clear. Low 8°. Wind south around 9 km/h.
Monday	Sunny. Warm. High 25°. UV index up to 5. Wind south-southwest around 10 km/h, gusting to 24 km/h.
Monday night	Clear. Low 8°. Wind south-southwest around 10 km/h.
Tuesday	Partly cloudy. Warm. High 24°. UV index up to 4. Wind southwest around 12 km/h, gusting to 25 km/h.
Tuesday night	Partly cloudy in the evening, becoming fair to partly cloudy after midnight. Low 10°. Wind southwest around 8 km/h.
Wednesday	Partly cloudy. Warm. High 24°. UV index up to 4. Wind southwest around 10 km/h, gusting to 30 km/h, in the morning, becoming 16 km/h, gusting to 31 km/h, in the afternoon.
Wednesday night	Partly cloudy. Low 8°. Wind southwest around 11 km/h, gusting to 27 km/h.
Thursday	Partly cloudy in the morning, becoming mostly sunny in the afternoon. Warm. High 23°. UV index up to 4. Wind west around 4 km/h in the morning, becoming north-northeast in the afternoon.
Thursday night	Partly cloudy in the evening, becoming fair to partly cloudy after midnight. A slight chance of rain in the evening, then a chance of rain after midnight. Low 7°. Wind north-northeast around 5 km/h in the evening, becoming west-southwest after midnight. Chance of precipitation 30 percent. Precipitation mostly less than 2 mm.
Friday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Warm. High 24°. UV index up to 3. Wind south-southwest around 10 km/h, gusting to 28 km/h, in the morning, becoming 21 km/h, gusting to 36 km/h, in the afternoon.
Friday night	Cloudy in the evening, becoming dense overcast after midnight. Rain likely in the evening, then a chance of rain after midnight. Thunderstorms very likely, some possibly severe. Low 9°. Wind west around 18 km/h, gusting to 32 km/h, in the evening, becoming northwest after midnight. Chance of precipitation 70 percent. Precipitation mostly between 5 and 10 mm.
Saturday	Dense overcast in the morning, becoming mostly cloudy to cloudy in the afternoon. A chance of rain in the morning, then a slight chance of rain in the afternoon. Scattered thunderstorms likely, some possibly severe. High 12°. UV index up to 2. Wind northwest around 14 km/h, gusting to 32 km/h, in the morning, becoming 7 km/h in the afternoon. Chance of precipitation 50 percent. Precipitation mostly around 2 mm.
Saturday night	Partly cloudy in the evening, becoming clear after midnight. Low 5°. Wind southwest around 9 km/h.

WXSIM forecast formatting script by Saratoga-Weather.org.