In January, San Isidro typically sees daytime highs of 26.0°C and overnight lows around 19.3°C. Compared to the annual average high of 22.9°C, January runs +3.1°C.
January in San Isidro averages a daytime high of 26.0°C and an overnight low of 19.3°C.
January runs +3.1°C compared to San Isidro's annual average high of 22.9°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 26.0°C and cooler evenings around 19.3°C.