In September, San Antonio de Los Altos typically sees daytime highs of 27.7°C and overnight lows around 18.9°C. Compared to the annual average high of 27.5°C, September runs +0.2°C.
September in San Antonio de Los Altos averages a daytime high of 27.7°C and an overnight low of 18.9°C.
September runs +0.2°C compared to San Antonio de Los Altos's annual average high of 27.5°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 27.7°C and cooler evenings around 18.9°C.