In April, Gaithersburg typically sees daytime highs of 18.8°C and overnight lows around 5.3°C. Compared to the annual average high of 18.5°C, April runs +0.3°C.
April in Gaithersburg averages a daytime high of 18.8°C and an overnight low of 5.3°C.
April runs +0.3°C compared to Gaithersburg's annual average high of 18.5°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 18.8°C and cooler evenings around 5.3°C.