What to pack for Colombo in May
- light, breathable clothing
- sun protection (hat, SPF 50)
- a compact umbrella or rain shell — rain is frequent
- expect humid, sticky conditions
Humidity averages 85%; max daily wind around 19 km/h.
How May compares
Best months in Colombo: January–February & June–October. See the full best time to visit Colombo guide.
Colombo in May: the details
In May, Colombo sees average daytime highs of 30°C (86°F) and overnight lows of 26°C (78°F). Rainfall totals roughly 388 mm across 29.5 rainy days, and the sun shines about 8.6 hours per day with 12.3 hours of daylight mid-month. Relative humidity averages 85%.
In context: May is the 5th-warmest month and the second-wettest in Colombo. The sunniest month is February (11.1 h/day).
| Metric | May average |
|---|---|
| Daytime high | 30°C / 86°F |
| Overnight low | 26°C / 78°F |
| Rainfall | 388 mm over 29.5 rainy days |
| Sunshine | 8.6 h/day (12.3 h daylight) |
| Humidity | 85% |
| Travel score | 4.3 / 10 |
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Colombo, Sri Lanka (6.94, 79.85) — see our methodology. Actual conditions vary year to year.
Not set on Colombo? Browse the best places to visit in May ranked by travel score.
Frequently asked questions
How hot is Colombo in May?
Daytime highs in Colombo in May average 30°C (86°F); nights drop to about 26°C.
Does it rain in Colombo in May?
Expect around 29.5 rainy days and 388 mm of rainfall in May.
Is May a good time to visit Colombo?
May is a challenging month to visit Colombo — consider January–February & June–October instead. Overall travel score: 4.3/10. The best months are January–February & June–October.
Where should you go next month?
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