Winters in Oldenburg are typically cold and unpredictable, with temperatures fluctuating between -12°C and 18°C on average around 3°C. Spring brings a slow warming trend, with temperatures gradually increasing from -4°C to 24°C by March, then stabilizing around 6-11°C throughout April and May. Summer is mild and pleasant, with July being the warmest month, averaging around 19°C, while August and September experience slightly cooler temperatures. Autumn sees a return to more variable weather, with October experiencing a similar temperature range to spring, before cooling off again in November and December, which are generally chilly, averaging around 4-7°C.