In September, Tsukuba typically sees daytime highs of 26.0°C and overnight lows around 18.8°C. Compared to the annual average high of 18.9°C, September runs +7.2°C.
September in Tsukuba averages a daytime high of 26.0°C and an overnight low of 18.8°C.
September runs +7.2°C compared to Tsukuba's annual average high of 18.9°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 26.0°C and cooler evenings around 18.8°C.