In September, Rhondda typically sees daytime highs of 16.3°C and overnight lows around 9.8°C. Compared to the annual average high of 12.0°C, September runs +4.3°C.
September in Rhondda averages a daytime high of 16.3°C and an overnight low of 9.8°C.
September runs +4.3°C compared to Rhondda's annual average high of 12.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 16.3°C and cooler evenings around 9.8°C.