September in Longview averages a daily high of 32.5°C with nights around 19.3°C. Expect roughly 5 wet days totalling 84.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Longview is March–April.
Based on LONGVIEW NUMBER 2, TX US (2.8km), 1995–2024. 21 years of September data.