Spring in Sanmenxia brings mild temperatures, with March averaging a comfortable 15°C. April and May see steady increases, reaching up to 25°C by June. Summer months are hot, with July often reaching highs of over 35°C, while August remains warm but slightly cooler. Autumn is characterized by moderate temperatures, dropping to around 10°C in November. Winters can be quite chilly, with January averaging just below freezing at around 2°C.