In September, Vantaa typically sees daytime highs of 13.9°C and overnight lows around 6.3°C. Compared to the annual average high of 7.9°C, September runs +6.0°C.
September in Vantaa averages a daytime high of 13.9°C and an overnight low of 6.3°C.
September runs +6.0°C compared to Vantaa's annual average high of 7.9°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 13.9°C and cooler evenings around 6.3°C.