September in Guelma averages a daily high of 31.8°C with nights around 17.4°C. Expect roughly 7 wet days totalling 39.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Guelma is March–May.
Based on GUELMA, AG (3.7km), 1995–2024. 16 years of September data.