Under the
Köppen climate classification, City of Thrissur features a
tropical monsoon climate. Summer lasts from March to May which is the hottest time of the year. Summer months are uncomfortable due to higher levels of heat and humidity. Daytime temperatures can rise up to 36- 38 °C coupled with excessive humidity. Summer is followed by the
south-west monsoon from June to September. October and November form the post monsoon or retreating monsoon season. Winter from December through February is cooler, and windy, due to winds from the
Western Ghats. Winter months are generally dry and less humid compared to other months of the year. Morning temperatures are usually cool and daytime temperatures hover around 30 °C. == References ==