Last updated: March 19, 2025
In September, Mirissa, Sri Lanka experiences a tropical climate characterized by warm temperatures and significant rainfall. With a maximum temperature reaching 31°C (88°F) and an average of 26°C (80°F), the weather remains comfortably warm. However, visitors should prepare for frequent showers, as the month sees 209 mm (8.2 in) of precipitation spread over 26 days. The high humidity level of 82% contributes to a lush environment, making this coastal town a prime destination for those who appreciate the beauty of nature amidst the rain. Whether you're exploring the serene beaches or indulging in local cuisine, September in Mirissa offers a unique blend of warmth and tropical charm.
In September, Mirissa city, Sri Lanka experiences a delightful maritime climate, with temperatures reflecting the transition from the cooler aspects of the dry season. The average temperature hovers at a comfortable 26°C (80°F), providing a pleasant escape from the sweltering heat of earlier months. As the month progresses, nighttime lows settle around 23°C (74°F), while daytime highs reach a maximum of 31°C (88°F). This period marks a slight dip in temperature compared to the peak summer months, yet still ensures warmth and vitality throughout the day. With gentle ocean breezes and vibrant coastal scenery, September becomes an inviting time for travelers to explore Mirissa's stunning beaches and lush surroundings.
In September, Mirissa city experiences a notable transition in its climate, characterized by an average precipitation of 209 mm (8.2 in) over 26 rainy days. This increase in rainfall contributes to the region's lush landscapes and vibrant ecosystem, making it a captivating time for nature lovers. As the wet season peaks, the amount gradually climbs from 172 mm (6.8 in) in April to over 250 mm in the following months, continuing to illustrate the city's role as a tropical haven. With stormy skies and rhythmic downpours, September enhances the enchanting atmosphere of Mirissa, cozying up visitors as they enjoy the rainforest ambiance and the beauty of Sri Lanka's coastline.
In September, Mirissa experiences a humidity level of 82%, continuing the trend of elevated moisture that characterizes the coastal climate throughout the year. The humidity begins to rise significantly during the monsoon months, peaking at 83% in both June and October. With levels fluctuating between 76% and 83% from May to October, September's climate reflects the lush, tropical essence of the region. This consistent humidity not only contributes to the vibrant landscapes but also enhances the warm, inviting atmosphere cherished by both locals and visitors alike. As the year progresses, the humidity remains a defining feature of Mirissa's enchanting weather, creating a welcoming environment for beachgoers and nature lovers.
In September, Mirissa city continues to experience a notably high UV Index of 14, categorizing the sunlight as extreme and resulting in a burn time of just 10 minutes. This trend of elevated UV levels persists throughout the year, with the index peaking at 15 in March and April, before gradually decreasing in late autumn. While each month maintains an extreme exposure category, September stands out as part of a consistent pattern; it aligns closely with August’s UV Index and reflects the month’s warm climate. Travelers and locals alike should remain vigilant about sun protection during this time, ensuring they enjoy the stunning beaches without risking skin damage. For more detailed information, check the Mirissa city UV Index.
UV Risk Categories
Mirissa city in Sri Lanka basks in the glow of September's sunshine, enjoying an impressive 317 hours of daylight. Following the vibrant peak of summer in July, which boasts 339 hours, September marks a slight decrease in sunshine but continues to provide ample opportunities for sun-soaked activities. The gradual decline in daylight from the summer months leads into a cozy autumn ambiance, while still outshining the earlier months of the year. This consistent warmth throughout the year, combined with playful ocean breezes, makes September a delightful time to explore the stunning coastlines and rich culture of Mirissa. With sunshine hours dipping only slightly compared to the vibrant summer, visitors can still revel in the beauty of this tropical paradise.
In Mirissa, Sri Lanka, the likelihood of sunny weather in September reflects a slight uptick in sunshine compared to the preceding months of July and August, which are among the cloudiest periods of the year. With a 21% chance of sunny days, September offers a more inviting climate for beachgoers and explorers alike. This increase is part of a broader trend, as sunlight begins to gain a foothold leading into October, where chances dip modestly to 18%. While the early months of the year like February and April boast the highest probabilities of sunshine, September serves as a transitional month—providing a mix of refreshing breezes and the promise of clearer skies as the monsoon season recedes.
In Mirissa, Sri Lanka, September continues the trend of consistent daylight duration, offering a wholesome 12 hours of sunshine each day. This pattern emerges in the late spring and summer months, as daylight stretches from March through the end of September. The steady 12-hour daylight in these months not only enhances outdoor activities but also invites visitors to savor the natural beauty and vibrant culture of the region. As October approaches, daylight begins to gently wane, leading back to the shorter hours of the latter part of the year. Overall, September represents a delightful peak in the long days that define the essence of a tropical paradise.
As September ushers in the transition from the peak summer months in Mirissa, Sri Lanka, the wind takes on a gentle breeze, averaging 5.0 m/s (11 mph). This slight dip from the roaring winds of July and August reflects a gradual easing as the season shifts. Over the months, wind speeds steadily increased from a modest 2.0 m/s (4 mph) in January, rising to a notable 5.8 m/s (13 mph) in July. By September, the winds remain pleasantly invigorating, providing a refreshing contrast to the warm coastal air. As the month progresses, the winds continue their descent, hinting at the onset of a calmer, more serene October. Embracing September's breezy charm, visitors find themselves enveloped in a delightful coastal atmosphere that perfectly complements the stunning beauty of this coastal gem.
The weather in Mirissa city changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Mirissa city and find detailed weather information for every month.
In comparing the weather of September and January, one can observe distinct differences in temperature and precipitation patterns. September experiences slightly warmer temperatures, with a minimum of 23°C (74°F) and a maximum of 31°C (88°F), while January has a minimum of 21°C (70°F) and peaks at 34°C (93°F). Despite this, both months share an average temperature of 26°C (80°F). However, September is noticeably wetter, with 209 mm (8.2 in) of rainfall over 26 days, compared to January's more manageable 85 mm (3.3 in) over just 12 days. Humidity levels are comparable, hovering around 82% in September and 80% in January. For a more detailed look at the conditions during this time, check out Mirissa city weather in January.
September and February showcase distinct weather patterns, with September typically being more humid and wet. In September, temperatures range from a minimum of 23°C (74°F) to a maximum of 31°C (88°F), accompanied by significant precipitation of 209 mm (8.2 in) spread over 26 days, resulting in an average humidity of 82%. In contrast, February offers warmer temperatures, with a minimum of 21°C (71°F) and a maximum of 35°C (95°F). Precipitation is considerably lower at 77 mm (3.0 in) over just 13 days, and humidity levels are slightly reduced at 77%. For a closer look at February weather specifics, you can visit Mirissa city weather in February.
In comparing the weather of September and March, both months maintain a warm climate characterized by relatively high temperatures. September sees a minimum temperature of 23°C (74°F) and an average of 26°C (80°F), with maximum temperatures reaching up to 31°C (88°F). This month is marked by substantial rainfall, totaling 209 mm (8.2 in) over 26 days, coupled with high humidity at 82%.
In contrast, March experiences a slightly higher average temperature of 27°C (81°F) and peaks at a maximum of 34°C (94°F), while maintaining the same minimum temperature of 23°C (73°F). Precipitation is significantly lower in March, with 121 mm (4.8 in) across 21 days and humidity levels also reduced to 77%. For a detailed overview, you can check the Mirissa city weather in March.
September and April share similar minimum temperatures of 23°C (74°F), but April tends to be slightly warmer on average, with an average of 27°C (82°F) compared to September's 26°C (80°F). In terms of maximum temperatures, April peaks at 33°C (92°F), making it hotter than September, which reaches a maximum of 31°C (88°F). While both months experience significant rainfall, September sees higher precipitation levels at 209 mm (8.2 in) over 26 days, compared to April's 172 mm (6.8 in) over 25 days. Additionally, the humidity levels are slightly lower in April at 77%, compared to September's 82%. For more details on what to expect during this time, you can check Mirissa city weather in April.
In comparing the weather of September and May, both months exhibit warm temperatures, but May tends to be slightly warmer on average. September showcases temperatures ranging from a minimum of 23°C (74°F) to a maximum of 31°C (88°F), while May has a minimum of 24°C (75°F) and tops out at 32°C (90°F). Precipitation levels are higher in May, with 252 mm (9.9 in) over 29 days compared to September's 209 mm (8.2 in) spread over 26 days. Additionally, humidity is notably higher in September at 82%, while May's humidity is a more comfortable 76%. For more specific insights, you can check Mirissa city weather in May.
In comparing the weather of September and June, we observe that both months exhibit warm temperatures, with September's average ranging from a minimum of 23°C (74°F) to a maximum of 31°C (88°F), while June features a slightly higher minimum of 24°C (75°F) and a maximum of 32°C (89°F). Both months experience considerable rainfall, with September seeing 209 mm (8.2 in) over 26 days and June receiving 189 mm (7.4 in) across 28 days. Humidity levels are similar, with September at 82% and June slightly higher at 83%. For more specific details about June weather in Mirissa, you can check Mirissa city weather in June.
In comparing the weather between September and July, both months exhibit similar temperature ranges, with minimums of 23°C (74°F) and maximums reaching 31°C (88°F). However, September tends to be slightly cooler on average at 26°C (80°F), while July has a higher average temperature of 27°C (81°F). Precipitation levels also differ, with September experiencing more rainfall at 209 mm (8.2 in) over 26 days compared to July's 156 mm (6.1 in) over 27 days. Interestingly, humidity levels are almost on par, with September at 82% and July slightly lower at 81%. For more detailed insights, you can check out Mirissa city weather in July.
In comparing the weather between August and September, both months experience similarly warm temperatures, with September seeing slightly lower minimum temperatures (23°C) compared to August (24°C). The average temperatures remain quite close, with September averaging 26°C and August at 27°C. However, September is notably wetter, receiving 209 mm of rainfall over 26 days, compared to August's 170 mm over 27 days. Both months maintain consistent humidity levels at 82%. For a more detailed look at August weather specifics, check out Mirissa city weather in August.
In September, the weather features a consistent temperature range with a minimum of 23°C (74°F), an average of 26°C (80°F), and a maximum of 31°C (88°F). However, it is marked by significant precipitation, totaling 209 mm (8.2 in) over 26 days, accompanied by a humidity level of 82%. In contrast, October maintains the same temperature profile, but sees an increase in rainfall to 258 mm (10.2 in) across 27 days, with humidity rising slightly to 83%. This suggests that while the temperatures remain stable, October tends to be wetter and slightly more humid. For a more detailed look at the weather conditions, you can visit Mirissa city weather in October.
In comparing the weather between September and November, both months showcase similar temperature ranges, with minimums around 23°C (74°F), averages at 26°C (80°F), and maximums nearing 31°C (88-89°F). However, November experiences slightly increased precipitation, totaling 261 mm (10.3 in) compared to September's 209 mm (8.2 in), although both months have rain spread over 26 days. Humidity remains fairly consistent, with September at 82% and November dipping slightly to 81%. For a more detailed look at weather conditions specific to this time of year, you can check Mirissa city weather in November.
In September, the weather typically features temperatures ranging from a minimum of 23°C (74°F) to a maximum of 31°C (88°F), with an average of 26°C (80°F). This month experiences significant rainfall, totaling 209 mm (8.2 in) over 26 days, while humidity remains high at 82%. In contrast, December boasts slightly warmer maximum temperatures, reaching up to 32°C (89°F), while maintaining an average of 26°C (80°F) and a minimal variation in minimum temperature at 22°C (73°F). Precipitation decreases to 188 mm (7.4 in) over 21 days, yet humidity stays consistent at 82%. For more detailed information, visit Mirissa city weather in December.
September in Mirissa city presents a unique blend of warmth and moisture, offering a striking contrast to the drier months. With average temperatures around 26°C and high humidity hovering at 82%, it creates a tropical ambiance that's pleasantly warm but can feel quite muggy. This month is marked by frequent rain, with nearly 26 days of precipitation resulting in a total of 209 mm—a notable increase compared to the drier periods. While several other months may boast sunnier skies, September's blend of climate characteristics makes it a time for lush landscapes and vibrant local culture. For a more detailed look at the weather patterns throughout the year, explore Mirissa city Climate.