In April, Heilbronn typically sees daytime highs of 14.3°C and overnight lows around 3.8°C. Compared to the annual average high of 14.0°C, April runs +0.3°C.
April in Heilbronn averages a daytime high of 14.3°C and an overnight low of 3.8°C.
April runs +0.3°C compared to Heilbronn's annual average high of 14.0°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 14.3°C and cooler evenings around 3.8°C.