April in Stevenage averages a daily high of 15°C with nights around 4.6°C. Expect roughly 9.9 wet days totalling 29.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Stevenage is May–September.
Based on CAMBRIDGE B. GDNS, UK (39.6km), 1995–2024. 21 years of April data.