In December, San Isidro typically sees daytime highs of 24.0°C and overnight lows around 17.5°C. Compared to the annual average high of 22.9°C, December runs +1.1°C.
December in San Isidro averages a daytime high of 24.0°C and an overnight low of 17.5°C.
December runs +1.1°C compared to San Isidro's annual average high of 22.9°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 24.0°C and cooler evenings around 17.5°C.