In December, Rio Grande typically sees daytime highs of 25.3°C and overnight lows around 18.5°C. Compared to the annual average high of 21.7°C, December runs +3.7°C.
December in Rio Grande averages a daytime high of 25.3°C and an overnight low of 18.5°C.
December runs +3.7°C compared to Rio Grande's annual average high of 21.7°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 25.3°C and cooler evenings around 18.5°C.