Colombo weather in May
May in Colombo: sweltering, soaked, with very humid — a fair time to visit.
#12 of 12 months in Colombo · #585 of 604 destinations to visit in May · comfort 50/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Colombo climate normals — May
| Daytime high | 30°C / 86°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 78°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 288 mm / 11.3 in | ⛈ soaked |
| Rainy days | 29 days | |
| Humidity | 87% | 💦 very humid |
| Dew point | 25°C / 77°F | |
| Sunshine | 9.1 h/day | |
| Daylight | 12.4 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 57 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Colombo in May — FAQ
- Is May a good time to visit Colombo?
- May in Colombo: sweltering, soaked, with very humid — a fair time to visit. It ranks #12 of 12 months for Colombo on SeasonMap's comfort score (50/100).
- What is the weather like in Colombo in May?
- In May, Colombo averages a daily high of 29.9°C and a low of 25.6°C, with about 288 mm of rain over roughly 29 rainy days.
- What is the air quality in Colombo in May?
- Colombo has a mean US Air Quality Index of about 57 in May.