April in Hartford averages a daily high of 15.9°C with nights around 4.5°C. Expect roughly 11.4 wet days totalling 99.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hartford is May–June.
Based on HARTFORD BRAINARD AIRPORT, CT US (4.2km), 1995–2024. 29 years of April data.