In September, Vaasa typically sees daytime highs of 13.3°C and overnight lows around 6.5°C. Compared to the annual average high of 7.0°C, September runs +6.2°C.
September in Vaasa averages a daytime high of 13.3°C and an overnight low of 6.5°C.
September runs +6.2°C compared to Vaasa's annual average high of 7.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 13.3°C and cooler evenings around 6.5°C.