Ernakulam has a **tropical monsoon climate**, generally classified as **Am** under the Köppen system, with year-round warmth, high humidity, and substantial seasonal rainfall.
### Seasonal pattern - **Summer:** Typically hot and humid from March to May. - **Southwest monsoon:** Usually arrives around June and continues through September, bringing the heaviest rains. - **Northeast monsoon / post-monsoon:** October to November can also be wet. - **Winter:** December to February is relatively milder and often the most comfortable time of year.
### Typical climate features | Climate Factor | General Pattern | |---|---| | Average daytime temperatures | Commonly around the high 20s to low 30s °C through much of the year | | Night temperatures | Usually warm, often in the low to mid 20s °C | | Rainfall | Heavy annual rainfall due to monsoon systems | | Snowfall | None | | Humidity | High for most of the year |
### Best time to visit The most pleasant period for many visitors is generally **December through February**, when rainfall is lower and temperatures are somewhat less oppressive than in peak summer.
### Weather risks - Heavy monsoon rain - Urban flooding and waterlogging in low-lying areas - Occasional strong winds and storm-related disruption from Arabian Sea weather systems
Exact long-term city-specific averages vary by weather station and reporting boundary, but the overall pattern is consistently hot, humid, and monsoonal.