September in Narva averages a daily high of 16.1°C with nights around 8.2°C. Expect roughly 13.3 wet days totalling 63.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Narva is June–August.
Based on NARVA, EN (4.6km), 1995–2024. 29 years of September data.