Weirton experiences a moderate climate with distinct seasonal variations. Winters are cold, with temperatures often dropping below freezing in January and February, but slowly warming up by March. As spring approaches, temperatures rise rapidly, with April and May being the warmest months so far, with highs reaching into the mid-20s to low 30s Celsius. Summer is mild, with July and August being the warmest months, though still averaging below 25 degrees Celsius. Autumn brings a return to cooler temperatures, with September and October experiencing a gentle decline before winter's chill sets in again.