CJRL Meterologist Bill Laidlaw says Sioux Lookout reached 33.5-degrees, smashing the old mark of 32.8 set in 1969.
Rain and a severe thunderstorm watch also hit the Kenora and Red Lake District's, but nothing major transpired.
Kenora did see 22.8-millimetres of rain last night.
Ear Falls only saw 3-millimetres.
There was no report from Red Lake.