In September, San Carlos typically sees daytime highs of 31.4°C and overnight lows around 23.0°C. Compared to the annual average high of 32.1°C, September runs -0.8°C.
September in San Carlos averages a daytime high of 31.4°C and an overnight low of 23.0°C.
September runs -0.8°C compared to San Carlos's annual average high of 32.1°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 31.4°C and cooler evenings around 23.0°C.