Winters in Barrow-in-Furness are typically mild and unpredictable, with temperatures often fluctuating between freezing and double-digit highs. January is usually the coldest month, with average temperatures around 3°C, but February can be even chillier. As spring arrives, temperatures gradually rise, with March and April averaging around 7°C. Summer brings warmer days, with July being the warmest month, often reaching highs of over 30°C, while August and September are still pleasant, albeit slightly cooler. In autumn, temperatures drop again, but remain relatively mild, with October and November experiencing average highs in the mid-teens.