In September, Oulu typically sees daytime highs of 11.9°C and overnight lows around 5.1°C. Compared to the annual average high of 5.3°C, September runs +6.6°C.
September in Oulu averages a daytime high of 11.9°C and an overnight low of 5.1°C.
September runs +6.6°C compared to Oulu's annual average high of 5.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 11.9°C and cooler evenings around 5.1°C.