Ottappalam experiences a warm climate year-round, with temperatures rarely dipping below 20°C or rising above 37°C. Winters are mild, with average temperatures ranging from 25-28°C between January and March. Summers are hot, but not excessively so, with average highs around 30-33°C from April to June. The monsoon season is relatively brief, bringing some respite from the heat in July and August, when temperatures dip slightly. As the monsoon withdraws, autumn brings more of the same warm weather, with November and December temperatures mirroring those of the early summer months.