Colombo
Sri Lanka
Colombo has warmed by about +0.8 °C since 1981.Its rainy-season rain shows no clear change.
Temperature
Whole year
Getting warmer
+0.17 °C
every 10 years
Very sure this is a real change
Hot season (March–May): +0.10 °C every 10 years.
Each year Long-term trend Likely range of the trend (95%)
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- Rate (Sen's slope)
- +0.175 °C/decade
- 95% range
- +0.128 to +0.220
- p-value (modified Mann–Kendall)
- p < 0.001
- Passes the map-wide check (FDR)
- Yes
- Map square used
- 7.00°N, 79.00°E (95 km from the city)
- Data
- NASA GISTEMP v4 (GISS), 2° grid
Rain
Rainy season (June–September)
No clear change
−11 mm
every 10 years (−2.0% of the usual amount)
Not sure: could be natural ups and downs
Whole year: +49 mm every 10 years.
Each year Long-term trend Likely range of the trend (95%)
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- Rate (Sen's slope)
- −10.6 mm/decade
- 95% range
- −47.2 to +23.6
- p-value (modified Mann–Kendall)
- p = 0.59
- Passes the map-wide check (FDR)
- No
- Map square used
- 6.25°N, 78.75°E (144 km from the city)
- Data
- GPCP v2.3 monthly precipitation (NASA GSFC / NOAA), 2.5° grid
Disasters around Colombo
Floods
44
flood alerts within 150 km since 2000, 10 of them serious or severe.
Most recent: November 2025.
Landslides
36
reported landslides within 100 km (2007–2017), 264 people died.
Deadliest: 101 people died, May 2016.
Fires
2
fires a year seen by satellite nearby in March–May (2003–2024 average).