In December, San Ildefonso typically sees daytime highs of 30.2°C and overnight lows around 22.0°C. Compared to the annual average high of 31.9°C, December runs -1.7°C.
December in San Ildefonso averages a daytime high of 30.2°C and an overnight low of 22.0°C.
December runs -1.7°C compared to San Ildefonso's annual average high of 31.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 30.2°C and cooler evenings around 22.0°C.