Colombo, Sri Lanka Weather
Colombo hourly forecast: next 24 hours
Today's high of 82°F (28°C) is right in line with the typical September high of 83°F (28°C).
Current conditions in detail
Colombo weather tomorrow (Thursday, September 17)
Tomorrow in Colombo looks light rain shower, with a high of 81° and an overnight low of 80°. There is a 88% chance of rain - plan accordingly. Winds top out near 18 mph, and the UV index reaches 12 (extreme).
Colombo 14-day forecast
About the weather in Colombo
Colombo has one of the steadier climates in our dataset. Average highs move only 2°C across the whole year - from 84°F (29°C) in November to 88°F (31°C) in April - so the practical difference between seasons here is rainfall and daylight, not warmth.
Colombo weather: quick facts
- Hottest month: April - highs near 88°F (31°C)
- Coldest month: November - highs near 84°F (29°C)
- Decade extremes (2015-2024): 96°F (36°C) high · 65°F (18°C) low
- Wettest month: May (30 rainy days) · Sunniest: February (11.1 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 2°C between the average warmest and coolest month · day to night: 5°C
- Months averaging 30°C or hotter: 4
- Average humidity: 84%
Temperatures through the year
November sits at the other end of the year: 84°F (29°C) by day, 74°F (24°C) at night. Warmth peaks in April: highs of 88°F (31°C), lows of 77°F (25°C). The gridded 2015-2024 daily record for this location tops out at 96°F (36°C) and bottoms at 65°F (18°C) - decade extremes, not all-time station records. Relative humidity averages 84% across the year, more humid than 95% of the 3496 cities in our dataset - enough that summer afternoons feel hotter than the thermometer says, which is what the dew point converter is for.
Rain, sun and snow
The wettest month is May (16.5 inches (418 mm) across 30 days) and the driest February. Sunshine averages 9.5 hours a day over the year, peaking in February at 11.1 hours. Days and nights are about 5°C apart on average - narrower than all but 4% of the 3496 cities in our dataset. Average highs hold at or above 30°C for 4 months of the year, January through April being the unbroken run.
Season by season
March through May
March through May is hot here - highs near 87°F (31°C), nights near 77°F (25°C), and rain falls on around 72 of the 90 days.
June through August
Through June through August, Colombo brings hot afternoons: 84°F (29°C) by day, 77°F (25°C) after dark, and rain falls on around 85 of the 90 days.
September through November
September through November brings hot afternoons here - highs near 84°F (29°C), nights near 76°F (24°C), and rain falls on around 82 of the 90 days.
December through February
December through February sits firmly in the heat here - highs near 87°F (30°C), nights near 74°F (23°C), and rain falls on around 40 of the 90 days. Daylight is generous - around 10.3 hours of sun a day.
Average temperatures in Colombo by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 87° | 73° | 11 | 3.1 in | 10.5 h/day | 77% |
| February | 88° | 74° | 11 | 2.1 in | 11.1 h/day | 76% |
| March | 88° | 76° | 18 | 4.2 in | 10.9 h/day | 80% |
| April | 88° | 77° | 25 | 6.2 in | 10.4 h/day | 83% |
| May | 85° | 78° | 30 | 16.5 in | 8.4 h/day | 86% |
| June | 84° | 78° | 29 | 12.2 in | 9.5 h/day | 86% |
| July | 84° | 78° | 28 | 8.8 in | 9.8 h/day | 85% |
| August | 83° | 77° | 28 | 9.5 in | 9.7 h/day | 86% |
| September | 83° | 77° | 28 | 11.6 in | 8.8 h/day | 86% |
| October | 83° | 76° | 29 | 15.4 in | 8.2 h/day | 87% |
| November | 84° | 74° | 25 | 15.4 in | 7.7 h/day | 88% |
| December | 85° | 74° | 18 | 6.7 in | 9.2 h/day | 84% |