In summer the average minimum temperature is 17 °C and the average high is 32 °C. (qantas.com)
While summer average temperature across Montana is 64 °F (17.8 °C), temperatures generally peak in July and August, with mean daily highs above 90 °F (32 °C) in the east, as well as in western valleys. (montanaclimate.org)
Researchers find strong climate signal behind the heatwaves and record average temperatures that beset Australia's eastern states this summer (climatechangenews.com)