In December, San Martin typically sees daytime highs of 32.6°C and overnight lows around 17.4°C. Compared to the annual average high of 24.9°C, December runs +7.7°C.
December in San Martin averages a daytime high of 32.6°C and an overnight low of 17.4°C.
December runs +7.7°C compared to San Martin's annual average high of 24.9°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 32.6°C and cooler evenings around 17.4°C.