Otwock's winters are harsh and cold, with temperatures often below freezing, averaging around -2°C in January and February. As spring arrives, temperatures gradually rise, reaching averages of 7°C by April and 12°C by May, bringing mild and pleasant conditions. Summer months are warm to hot, with temperatures frequently reaching 30°C or more, peaking in July with an average high of 22°C. Autumn is generally cool and crisp, with temperatures returning to around freezing by November, marking the beginning of another cold winter period.