Weather in Sri Lanka for May 2025
In general, the average temperature in Sri Lanka at the beginning of May is 30.1 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 29.3 °C by the end of May.
Sri Lanka experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 614.9 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 in May average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2 30° | 3 31° | 4 31° | |||
| 5 30° | 6 30° | 7 30° | 8 30° | 9 30° | 10 29° | 11 30° |
| 12 28° | 13 30° | 14 30° | 15 30° | 16  30° | 17 31° | 18 30° |
| 19 29° | 20 29° | 21 29° | 22 29° | 23 30° | 24  30° | 25 29° |
| 26 30° | 27 29° | 28 29° | 29 30° | 30 29° | 31 29° |
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Temperatures trend during May in Sri Lanka
May weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Moderate or heavy rain shower | 29° /26° | 20.6 mm | 7 | |
| 2 May | Moderate or heavy rain shower | 30° /26° | 40.5 mm | 7 | |
| 3 May | Moderate or heavy rain shower | 31° /26° | 12.7 mm | 7 | |
| 4 May | Moderate or heavy rain shower | 31° /26° | 11.4 mm | 7 | |
| 5 May | Moderate or heavy rain shower | 30° /25° | 14.3 mm | 7 | |
| 6 May | Moderate or heavy rain shower | 30° /25° | 19 mm | 7 | |
| 7 May | Moderate or heavy rain shower | 30° /26° | 11.3 mm | 7 | |
| 8 May | Moderate or heavy rain shower | 30° /25° | 10.9 mm | 7 | |
| 9 May | Moderate or heavy rain shower | 30° /25° | 23.5 mm | 7 | |
| 10 May | Moderate or heavy rain shower | 29° /26° | 14.6 mm | 6 | |
| 11 May | Moderate or heavy rain shower | 30° /25° | 12.5 mm | 7 | |
| 12 May | Moderate or heavy rain shower | 28° /25° | 15.8 mm | 6 | |
| 13 May | Moderate or heavy rain shower | 30° /26° | 19.5 mm | 7 | |
| 14 May | Moderate or heavy rain shower | 30° /25° | 16.1 mm | 7 | |
| 15 May | Moderate or heavy rain shower | 30° /25° | 7.9 mm | 7 | |
| 16 May | Patchy rain possible | 30° /25° | 5 mm | 7 | |
| 17 May | Patchy rain possible | 31° /26° | 7.8 mm | 7 | |
| 18 May | Patchy rain possible | 30° /26° | 35.4 mm | 7 | |
| 19 May | Patchy rain possible | 29° /25° | 57.6 mm | 7 | |
| 20 May | Patchy rain possible | 29° /25° | 27.8 mm | 7 | |
| 21 May | Patchy rain possible | 29° /25° | 9.2 mm | 7 | |
| 22 May | Moderate rain at times | 29° /25° | 9.3 mm | 7 | |
| 23 May | Patchy rain possible | 30° /26° | 14.1 mm | 7 | |
| 24 May | Cloudy | 30° /26° | 45.4 mm | 7 | |
| 25 May | Patchy rain possible | 29° /26° | 29.5 mm | 7 | |
| 26 May | Patchy rain possible | 30° /26° | 15.4 mm | 7 | |
| 27 May | Moderate or heavy rain shower | 29° /26° | 27.7 mm | 7 | |
| 28 May | Moderate or heavy rain shower | 29° /26° | 26.9 mm | 7 | |
| 29 May | Moderate or heavy rain shower | 30° /26° | 23.6 mm | 7 | |
| 30 May | Patchy rain possible | 29° /26° | 20.2 mm | 7 | |
| 31 May | Moderate or heavy rain shower | 29° /26° | 9.6 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.
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Sri Lanka in May - FAQ
What to pack to Sri Lanka in May?
As you prepare for your trip to Sri Lanka in May, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Sri Lanka, during May, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Sandals/Flip-flops: Comfortable for warm climates
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
May rainfall patterns in Sri Lanka
UV exposure in Sri Lanka during May
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