In March, San Bernardino typically sees daytime highs of 19.3°C and overnight lows around 5.5°C. Compared to the annual average high of 24.7°C, March runs -5.5°C.
March in San Bernardino averages a daytime high of 19.3°C and an overnight low of 5.5°C.
March runs -5.5°C compared to San Bernardino's annual average high of 24.7°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 19.3°C and cooler evenings around 5.5°C.