Last updated: March 19, 2025
May in Ratnapura, Sri Lanka is characterized by a warm and humid climate, with temperatures ranging from a comfortable 20°C (68°F) at night to a peak of 30°C (86°F) during the day. With an average temperature of 24°C (76°F), this month sees significant rainfall, totaling 431 mm (17.0 in) across 29 days, making it one of the wettest periods of the year. The humidity level hovers around a high 79%, contributing to a lush, vibrant landscape that is a hallmark of Ratnapura during the monsoon season. Travelers should be prepared for both the warmth and the frequent showers, embracing the richness of nature that thrives in this tropical setting.
In Ratnapura, Sri Lanka, May marks a transitional period as temperatures begin to rise, bringing a slightly warmer climate compared to earlier months. The average temperature hovers around 24°C (76°F), with minimums of 20°C (68°F) and a maximum reaching 30°C (86°F), providing a comfortable yet humid atmosphere. This slight increase in warmth is typical as the region moves from the cooler early months into the hotter season, hinting at the approaching monsoon period. Overall, May offers a pleasant blend of tropical warmth while maintaining a relatively stable average, making it an inviting time for visitors to experience the lush beauty of Ratnapura.
In May, Ratnapura experiences a significant peak in precipitation, with 431 mm (17.0 in) of rainfall accumulated over 29 days. This marks the transition into the heart of the wet season, where rainfall reaches its highest levels, just slightly edged out by the impending downpours of October. The consistent rainfall in May, alongside March and April—which also showcase high precipitation levels—suggests a robust climate pattern that significantly nourishes the lush landscapes typical of this region. While preceding months hint at a gradual increase in rainfall, the volume in May firmly establishes it as a pivotal month for water accumulation, providing essential resources for agriculture and sustaining the vibrant ecosystem of Ratnapura.
In May, Ratnapura experiences a notable increase in humidity, reaching 79%. This marks a subtle rise from the drier months of March and April, both of which hover at 69%. As the region transitions towards the rainy season, humidity begins to climb, foreshadowing the intense moisture that characterizes the upcoming months. June typically brings an even higher level of humidity, soaring to 85%, which aligns with a marked trend of increasing humidity as the year progresses—culminating in the peak of October at an impressive 89%. This pattern highlights how Ratnapura's climate subtly transforms as spring gives way to the lush, wet landscapes of the summer months.
In May, Ratnapura, Sri Lanka experiences a UV Index of 15, maintaining an extreme exposure category that has been consistent since March. This level of UV intensity means that residents and visitors alike should be especially vigilant about sun protection, with a burn time of just 10 minutes. May continues the trend of high UV indexes seen throughout the year, peaking during these warmer months, which also indicates a growing need for sun safety awareness. As temperatures rise and outdoor activities increase, it’s crucial to prioritize skin protection to prevent harmful effects. For more information, check the detailed Ratnapura UV Index.
UV Risk Categories
May in Ratnapura, Sri Lanka, shines with 319 hours of glorious sunshine, perfectly nestled among the month’s vibrant atmosphere. Following a delightful April, which boasted 331 hours of sun, May continues the trend of ample daylight and warmth, contributing to the region's lush landscapes and rich biodiversity. The transition into June promises even more sunshine, reflecting a consistent pattern where the first half of the year tends to enjoy generous daylight hours. As we look forward to the upcoming months, it’s interesting to note that July and August are particularly bright, often surpassing 330 hours, solidifying Ratnapura as a destination for sun-seekers eager to experience its breathtaking natural beauty.
In Ratnapura, Sri Lanka, the likelihood of sunny weather in May is notably low at just 13%, making it one of the less favorable months for sun lovers. This is a sharp contrast to the preceding months of February and April, which boast higher chances of sunshine at 36% and 37% respectively. The trend reveals a dip in sunny days as the region transitions from the more favorable pre-monsoon period into the start of the wet season. Following May, the chances of sunshine remain modest through June and July, dropping to 18% and 11%. Overall, those seeking bright days in Ratnapura might want to plan their visits earlier in the year, as the months preceding May typically offer a greater opportunity for sunlight.
In Ratnapura, Sri Lanka, the daylight duration exhibits a fascinating seasonal rhythm throughout the year. Starting off with a consistent 11 hours of daylight in both January and February, the region begins to transition into a brighter phase by March, as daylight stretches to 12 hours. This extended daylight period remains stable from March through September, offering an inviting climate for outdoor activities and exploration. October marks a gradual return to shorter days, with daylight once again decreasing to 11 hours, continuing this pattern until the end of the year. This steady cycle of light and darkness not only shapes daily life but also enhances the vibrant beauty of this lush rainforest region.
In Ratnapura, Sri Lanka, the month of May marks a noticeable uptick in wind activity, with an average speed of 1.9 m/s (4 mph). This gentle breeze is a prelude to the increasingly dynamic winds that characterize the following months, as wind speeds continue to rise through June and July, peaking at 2.5 m/s (6 mph). The gradual shift from the calmer April to the breezier May signals the onset of the wet season, which brings invigorating winds that complement the lush, verdant surroundings. As the year progresses, a slight decline in wind speed occurs towards the end of the year, but May stands out as a month where nature begins to stir, offering a refreshing change that many locals and visitors eagerly anticipate.
The weather in Ratnapura changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Ratnapura and find detailed weather information for every month.
May and January present distinct weather patterns, with May being notably wetter and warmer than January. In May, temperatures range from a minimum of 20°C (68°F) to a maximum of 30°C (86°F), with an average temperature of 24°C (76°F). This month sees significant rainfall, totaling 431 mm (17.0 in) over 29 days, resulting in a humidity level of 79%. In contrast, January features a slightly milder climate, with temperatures ranging from 15°C (59°F) to 30°C (86°F), averaging 23°C (74°F). It experiences less precipitation, with 241 mm (9.5 in) over 18 days and a humidity level of 80%. For a closer look at the January weather specifics, you can visit Ratnapura weather in January.
In comparing the weather between May and February, we see distinct differences in temperature and precipitation patterns. May tends to have higher minimum temperatures, averaging around 24°C (76°F), with maximums reaching 30°C (86°F). In contrast, February has a slightly lower minimum at 16°C (62°F), while the maximum can peak at 32°C (90°F), suggesting warmer days. Precipitation is notably higher in May, totaling 431 mm (17.0 in) over 29 days, compared to February's 289 mm (11.4 in) over 23 days. Additionally, February experiences lower humidity at 72%, compared to May's 79%, making February feel a bit less muggy. For more detailed information, you can visit Ratnapura weather in February.
When comparing the weather in March and May, both months show a similar average temperature of around 24°C (75°F). However, May features a slightly higher minimum temperature of 20°C (68°F), while March begins at a lower 17°C (62°F). March also peaks at a higher maximum of 31°C (88°F) compared to May's 30°C (86°F). Precipitation levels are notably higher in May, with 431 mm (17.0 in) of rain over 29 days, compared to 384 mm (15.1 in) in March, also spread over 29 days. Additionally, May has higher humidity at 79%, whereas March's humidity is at 69%. For more details on March weather, visit Ratnapura weather in March.
In comparing the weather patterns of April and May, we observe some notable differences. Both months exhibit similar average temperatures, around 24°C (76°F), but May sees slightly higher minimum and maximum temperatures, ranging from 20°C (68°F) to 30°C (86°F), compared to April's 18°C (65°F) to 31°C (88°F). Interestingly, May experiences a bit more precipitation, totaling 431 mm (17.0 in) over 29 days, while April has 415 mm (16.3 in) over 28 days. Additionally, humidity levels are higher in May at 79%, compared to 69% in April. This suggests that May is not only wetter but also more humid than April, making for a more tropical feel as the months progress. For a closer look at April's weather, check out Ratnapura weather in April.
In comparing the weather of May and June, we observe some notable differences. May tends to be slightly warmer, with a maximum temperature reaching 30°C (86°F) compared to June's peak of 29°C (84°F). Both months have a minimum temperature of 20°C (68°F) and an average temperature of around 24°C. However, May is significantly wetter, with 431 mm (17.0 in) of rainfall over 29 days, whereas June sees just 233 mm (9.2 in) of rain across 28 days, leading to a drier feel. Additionally, humidity increases slightly from May to June, from 79% to 85%. For more specific information on June weather, you can check Ratnapura weather in June.
In May, the weather is warmer with maximum temperatures reaching up to 30°C (86°F) and an average of 24°C (76°F). Despite the pleasant temperatures, May is notably wetter, with 431 mm (17.0 in) of precipitation over 29 days and a humidity level of 79%. In contrast, July experiences slightly cooler maximum temperatures, peaking at 28°C (83°F) and maintaining an average of 24°C (75°F). July also sees a significant reduction in rainfall, with only 219 mm (8.6 in) of precipitation, though it too has rainfall over 29 days, and humidity remains relatively high at 81%. For more details, you can refer to Ratnapura weather in July.
May and August display distinct weather patterns, with May generally being warmer and wetter. In May, temperatures range from a minimum of 20°C (68°F) to a maximum of 30°C (86°F), accompanied by significant precipitation of 431 mm (17.0 in) over 29 days and an average humidity of 79%. In contrast, August features slightly cooler temperatures, with a minimum of 20°C (68°F) and a maximum of 28°C (83°F). The precipitation also decreases to 245 mm (9.6 in) over 27 days, yet humidity rises to 85%. For more detailed information, you can check Ratnapura weather in August.
In comparing May and September, we find that both months experience warm temperatures, though May tends to be slightly warmer, with average highs around 30°C (86°F) compared to September's maximum of 29°C (84°F). Humidity levels are relatively high in both months, notably at 79% for May and a slightly higher 81% for September. However, May is characterized by significantly more rainfall, with 431 mm (17.0 in) of precipitation over 29 days, compared to September's 287 mm (11.3 in) over 26 days. For more specific details about weather conditions, you can check Ratnapura weather in September.
May and October exhibit similar temperature ranges, with May averaging a comfortable 24°C (76°F) and October slightly cooler at 23°C (74°F). Both months experience mild minimum temperatures of around 20°C (68°F) in May and 19°C (66°F) in October, while maximum temperatures peak at 30°C (86°F) and 28°C (84°F) respectively. However, October sees slightly higher precipitation levels, totaling 475 mm (18.7 in) compared to May's 431 mm (17.0 in), despite both months recording rainfall on 29 days. Additionally, October tends to be more humid, with humidity levels reaching 89% compared to May's 79%. For more detailed information about October weather, you can refer to Ratnapura weather in October.
May and November exhibit warm temperatures, with November being slightly cooler on average. In May, temperatures range from a minimum of 20°C to a maximum of 30°C, while November sees minimums of 18°C and maximums of 29°C. Both months experience considerable rainfall, but November is notably wetter, receiving 643 mm of precipitation over 26 days compared to May’s 431 mm over 29 days. Additionally, November has a higher humidity level at 88%, compared to May's 79%. For detailed weather insights, check out Ratnapura weather in November.
May and December exhibit distinct weather patterns, though both months experience warm temperatures. In May, temperatures range from a minimum of 20°C (68°F) to a maximum of 30°C (86°F), with an average of 24°C (76°F). This month sees significant rainfall, totaling 431 mm (17.0 in) over 29 days, and a humidity level of 79%. In contrast, December has slightly cooler temperatures, with a minimum of 17°C (63°F) and an average of 23°C (74°F), but still peaks at 30°C (85°F). Precipitation in December is a bit lower at 402 mm (15.8 in) over 27 days, accompanied by higher humidity at 86%. For more specific details on December weather, visit Ratnapura weather in December.
In May, Ratnapura experiences a distinct shift in weather patterns compared to other months. The warm temperatures, peaking at a comfortable 30°C (86°F), are often accompanied by high humidity levels around 79%, creating a tropical atmosphere. This month is notably marked by increased rainfall, with nearly 29 days of precipitation contributing to a substantial total of 431 mm (17.0 in). As a result, the lush landscapes around the city flourish, making this a vibrant time to witness the natural beauty of the region. For a deeper look into the city's climate patterns throughout the year, explore Ratnapura Climate.