Climate Chart of Colombo, Sri Lanka

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

Climate overview

Temperature

The monthly mean temperature reaches its highest point in April, at 27.6 °C. This is a monthly average, not a daytime maximum, so it should not be read as the temperature visitors will encounter at the warmest time of day. The lowest monthly mean is 25.8 °C, shared by November / December. Across the calendar-month means, the unweighted mean is 26.7 °C; it summarizes the supplied monthly averages rather than a day-weighted annual average.

Rain

Mean daily rainfall is highest in October, at 12.73 mm/day, and lowest in February, at 2.25 mm/day. The figures are daily means for those months, not monthly rainfall totals; the lower average does not guarantee rain-free days or indicate how often rain occurs. The unweighted mean across the calendar-month rainfall means is 7.62 mm/day. For practical planning, treat this as a broad reference alongside the distinct monthly highs and lows, rather than as a prediction for a particular day.

Sunshine

Mean daily sunshine duration is highest in March, at 10.49 hours/day, and lowest in November, at 7.86 hours/day. These are averages of sunshine duration, not measures of day length, and do not guarantee the same conditions every day. The unweighted mean across the calendar-month sunshine means is 9.30 hours/day. It provides a general point of reference for the year while leaving day-to-day variation unresolved.

Best Travel Time Guide for Colombo, Sri Lanka: Ideal Seasons and Weather Insights

Visitors prioritising lower average rainfall can consider February, when mean daily rainfall is 2.25 mm/day; this is a criterion-specific option, not a promise of dry weather or a measure of rain frequency. For rain preparation, note that the highest monthly mean is in October at 12.73 mm/day, and plan for possible wet conditions rather than relying on the average as a daily forecast. For visitors who prefer cooler monthly averages, November / December has the lowest monthly mean temperature, 25.8 °C. This figure describes the month-level average, not daytime highs or the conditions on a specific outing, so it cannot by itself determine what clothing will be suitable on a given day.

For outdoor sightseeing planned around average sunshine duration, March has the highest mean at 10.49 hours/day; November has the lowest at 7.86 hours/day. Sunshine hours are not day length and cannot assure clear skies, so keep plans flexible and use these averages only as broad guidance.

Climate Data Overview for Colombo, Sri Lanka

Explore the comprehensive climate data for Colombo, Sri Lanka. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

• See also climate change in Colombo
• Explore the climate in Sri Lanka