In June, Naperville typically sees daytime highs of 26.6°C and overnight lows around 14.0°C. Compared to the annual average high of 14.7°C, June runs +11.8°C.
June in Naperville averages a daytime high of 26.6°C and an overnight low of 14.0°C.
June runs +11.8°C compared to Naperville's annual average high of 14.7°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 26.6°C and cooler evenings around 14.0°C.