Kottayam has a **tropical monsoon climate**, commonly classified as **Am (Tropical Monsoon)** under the Köppen system, though local conditions can resemble humid tropical wet climates through much of the year.
### General pattern - **Summer:** Warm and humid, typically from March to May. - **Southwest monsoon:** Heavy rainfall from roughly June to September. - **Northeast monsoon / retreating monsoon:** Additional rains often occur from October to November. - **Cooler season:** December to February is comparatively milder, though still warm by temperate standards.
### Typical conditions | Season | Usual Conditions | |---|---| | March-May | Hot, humid afternoons; temperatures often around 30-35°C | | June-September | Frequent heavy rain, cloudy skies, high humidity | | October-November | Continued rainfall with thunderstorms possible | | December-February | Warm days, relatively pleasant evenings, lower rainfall |
### Rainfall and humidity Kottayam receives high annual rainfall, consistent with central Kerala's monsoon climate. Humidity is generally high year-round, especially during and around the monsoon months.
### Best time to visit - **Most comfortable:** December to February - **For lush scenery and backwaters:** Monsoon season can be beautiful, though very wet
### Natural hazards - Heavy rain can lead to **urban waterlogging**, localized flooding, and transport disruption. - The wider district can be affected by **monsoon-related flooding** and landslide risk in more elevated eastern areas. - Cyclones are less typical than on India's east coast, but remnant storm systems can still bring intense rain.
Detailed long-term climate normals vary by source and station; precise monthly averages should be checked through the India Meteorological Department for technical use.
