Blyth's weather is marked by a gradual warming trend throughout the year. Winters are cold and variable, with temperatures often fluctuating between freezing point and mild conditions, averaging around 1-6 degrees Celsius. Spring brings slow but steady warming, with March and April seeing average highs of around 8-13 degrees Celsius, while summer months are generally warm, with July being the hottest with an average high of 15 degrees Celsius. Autumn is similarly temperate to spring, with temperatures ranging from 4-17 degrees Celsius in September and October before dropping again.