In April, San Francisco typically sees daytime highs of 27.0°C and overnight lows around 16.9°C. Compared to the annual average high of 25.2°C, April runs +1.8°C.
April in San Francisco averages a daytime high of 27.0°C and an overnight low of 16.9°C.
April runs +1.8°C compared to San Francisco's annual average high of 25.2°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 27.0°C and cooler evenings around 16.9°C.