Winters in Cleethorpes are generally mild and unpredictable, with temperatures often fluctuating between freezing and above-average warmth. January and February can see sub-zero lows, but also experience warmer days, while December's temperatures tend to be more stable around the average. Spring is a gradual warming trend, with March and April temperatures slowly rising towards summer highs. Summers are warm to hot, with July and August often reaching the upper end of their temperature range. Autumn brings a return to cooler conditions, with October and November seeing some frosty mornings, although still relatively mild overall.