In September, Tallinn typically sees daytime highs of 14.3°C and overnight lows around 7.6°C. Compared to the annual average high of 8.1°C, September runs +6.3°C.
September in Tallinn averages a daytime high of 14.3°C and an overnight low of 7.6°C.
September runs +6.3°C compared to Tallinn's annual average high of 8.1°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 14.3°C and cooler evenings around 7.6°C.