In September, Danbury typically sees daytime highs of 22.8°C and overnight lows around 11.2°C. Compared to the annual average high of 14.9°C, September runs +7.9°C.
September in Danbury averages a daytime high of 22.8°C and an overnight low of 11.2°C.
September runs +7.9°C compared to Danbury's annual average high of 14.9°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 22.8°C and cooler evenings around 11.2°C.