In September, Sofia typically sees daytime highs of 20.3°C and overnight lows around 8.4°C. Compared to the annual average high of 13.2°C, September runs +7.1°C.
September in Sofia averages a daytime high of 20.3°C and an overnight low of 8.4°C.
September runs +7.1°C compared to Sofia's annual average high of 13.2°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 20.3°C and cooler evenings around 8.4°C.