October in Harlow averages a daily high of 14.8°C with nights around 7.8°C. Expect roughly 15.4 wet days totalling 79.1mm. 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 October data.