In September, Saint Paul typically sees daytime highs of 21.6°C and overnight lows around 9.8°C. Compared to the annual average high of 12.3°C, September runs +9.3°C.
September in Saint Paul averages a daytime high of 21.6°C and an overnight low of 9.8°C.
September runs +9.3°C compared to Saint Paul's annual average high of 12.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 21.6°C and cooler evenings around 9.8°C.