Winters in Fredrikstad are cold and dark, with temperatures often below freezing, averaging around -1°C in January. As the season progresses, temperatures slowly rise, but February is still quite chilly, averaging 0°C. Spring arrives in March, bringing milder days with temperatures ranging from -9°C to 17°C, gradually warming up over the next few months. Summer is warm and pleasant, with July being the warmest month, averaging 16°C, while autumn brings a return to cooler temperatures, with October and November experiencing temperatures around 5-9°C. Winters once again set in by December, with temperatures averaging 2°C.