August in Harlow averages a daily high of 21.9°C with nights around 12.4°C. Expect roughly 11.8 wet days totalling 64.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Harlow is June–September.
Based on ROTHAMSTED, UK (17.3km), 1995–2024. 30 years of August data.