In June, Janesville typically sees daytime highs of 26.1°C and overnight lows around 13.4°C. Compared to the annual average high of 13.9°C, June runs +12.1°C.
June in Janesville averages a daytime high of 26.1°C and an overnight low of 13.4°C.
June runs +12.1°C compared to Janesville's annual average high of 13.9°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 26.1°C and cooler evenings around 13.4°C.