March in Harlow averages a daily high of 10.6°C with nights around 2.7°C. Expect roughly 12.9 wet days totalling 46mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Harlow is June–September.
Based on ROTHAMSTED, UK (17.3km), 1995–2024. 30 years of March data.