The winters in Nam Dinh are mild, with temperatures ranging from 8-25°C in January and 11-27°C in December. As the seasons progress into spring, temperatures steadily rise, reaching averages of 20°C by February and 22°C by March. Summer months bring high temperatures, with June to August averaging around 30-31°C, but still within a relatively narrow range. Autumn brings relief from the heat, with temperatures dropping back down to 17-24°C by October and November. The coolest months are typically December and January.