In July, Janesville typically sees daytime highs of 28.3°C and overnight lows around 15.9°C. Compared to the annual average high of 13.9°C, July runs +14.4°C.
July in Janesville averages a daytime high of 28.3°C and an overnight low of 15.9°C.
July runs +14.4°C compared to Janesville's annual average high of 13.9°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 28.3°C and cooler evenings around 15.9°C.