Weather in Sri Lanka for May 2027
In general, the average temperature in Sri Lanka at the beginning of May is 30 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 28.8 °C by the end of May.
Sri Lanka experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 527.2 mm.
Is May a good time to visit Sri Lanka? check out the best time to travel to Sri Lanka page.
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Sri Lanka Weather May
What’s the Weather Like in Sri Lanka This May?
Temperatures trend during May in Sri Lanka
May weather in Sri Lanka day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Moderate rain | 30° /26° | 10.6 mm | 6 | |
| 2 May | Moderate rain | 30° /26° | 20.9 mm | 7 | |
| 3 May |  Moderate or heavy rain shower | 31° /26° | 8.9 mm | 6 | |
| 4 May | Moderate or heavy rain shower | 30° /26° | 9.4 mm | 7 | |
| 5 May |  Light rain | 30° /26° | 8.3 mm | 7 | |
| 6 May | Moderate rain | 30° /25° | 11.3 mm | 6 | |
| 7 May | Moderate rain | 30° /26° | 11.6 mm | 6 | |
| 8 May | Moderate or heavy rain shower | 30° /25° | 9.5 mm | 6 | |
| 9 May | Moderate rain | 30° /26° | 14.1 mm | 6 | |
| 10 May | Moderate rain | 29° /26° | 12.1 mm | 6 | |
| 11 May | Moderate rain | 30° /25° | 12.2 mm | 6 | |
| 12 May | Moderate rain | 29° /26° | 11.8 mm | 6 | |
| 13 May | Moderate rain | 29° /26° | 24.5 mm | 6 | |
| 14 May | Moderate rain | 29° /25° | 24.9 mm | 6 | |
| 15 May | Moderate rain | 29° /25° | 13.8 mm | 6 | |
| 16 May | Light rain | 30° /26° | 6 mm | 6 | |
| 17 May | Light rain | 30° /26° | 9 mm | 6 | |
| 18 May |  Heavy rain | 29° /26° | 28.1 mm | 6 | |
| 19 May | Heavy rain | 29° /26° | 37.7 mm | 6 | |
| 20 May | Moderate rain | 29° /26° | 20.2 mm | 6 | |
| 21 May |  Patchy light rain with thunder | 29° /26° | 16.8 mm | 6 | |
| 22 May | Moderate rain | 29° /26° | 18.9 mm | 7 | |
| 23 May | Moderate rain | 29° /26° | 14 mm | 6 | |
| 24 May | Heavy rain | 29° /26° | 33.3 mm | 6 | |
| 25 May | Heavy rain | 28° /26° | 30.7 mm | 6 | |
| 26 May | Moderate rain | 29° /26° | 19.2 mm | 6 | |
| 27 May | Moderate rain | 29° /26° | 20.6 mm | 6 | |
| 28 May | Moderate rain | 29° /26° | 18.4 mm | 6 | |
| 29 May | Moderate rain | 29° /26° | 17.9 mm | 6 | |
| 30 May | Moderate rain | 29° /26° | 20.3 mm | 6 | |
| 31 May | Patchy light rain with thunder | 29° /26° | 12.3 mm | 6 | |
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Guide for Sri Lanka in May
In May, Sri Lanka experiences a transition in weather patterns, particularly at the beginning and end of the month. At the start of May, the weather in Sri Lanka is generally warm and humid, with temperatures ranging from 27° to 31°.
The coastal areas, including popular tourist destinations such as Colombo and Galle, can expect occasional afternoon showers due to the inter-monsoonal conditions.
However, the central highlands, including Kandy and Nuwara Eliya, enjoy cooler temperatures, ranging from 18° to 22°, with a higher chance of rainfall.
By the end of May, the weather in Sri Lanka becomes increasingly influenced by the southwest monsoon, bringing more widespread and heavier rainfall across the island. Coastal regions experience higher humidity and temperatures ranging from 28° to 32°, with intermittent showers and thunderstorms.
In the central highlands, the temperatures remain cooler, ranging from 17° to 21°, with an increased likelihood of continuous rainfall.
Overall, May in Sri Lanka marks the transition from the inter-monsoonal conditions to the southwest monsoon, resulting in varying weather patterns across the country.