In March, New Haven typically sees daytime highs of 7.7°C and overnight lows around -1.8°C. Compared to the annual average high of 15.4°C, March runs -7.7°C.
March in New Haven averages a daytime high of 7.7°C and an overnight low of -1.8°C.
March runs -7.7°C compared to New Haven's annual average high of 15.4°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 7.7°C and cooler evenings around -1.8°C.