Colombo experiences a wet and dry tropical climate with warm temperatures year-round, sitting just north of the equator where seasonal variation means rain, not temperature swings.

The southwest monsoon brings heavy rainfall from May to September, while the northeast monsoon adds lighter showers from October to January, making truly dry months a rare commodity.

Temperatures hover consistently between 26°C and 31°C throughout the year, with little variation that might justify packing anything beyond summer clothing.

Humidity remains persistently high at 70-90%, creating that sticky, sauna-like atmosphere that turns any synthetic fabric into a personal punishment device.

Light-coloured linens fare better than dark cottons in Colombo's relentless sun and frequent downpours, as they dry faster and reflect heat without showing every rain splash.