Last updated: August 21, 2025
September in Tilaran, Costa Rica is characterized by warm and humid conditions, with maximum temperatures reaching up to 32°C (89°F) and an average of about 24°C (76°F). The month is notably wet, with precipitation totaling 265 mm (10.4 in) across nearly all 29 days, resulting in a steamy atmosphere with humidity levels around 80%. Visitors should be prepared for frequent rainfall, making this a lush and vibrant time to experience the region's natural beauty.
In September, Tilaran, Costa Rica continues to embrace the warmth of the wet season, characterized by temperatures that range from a mild 20°C (69°F) at night to a comfortable 32°C (89°F) during the day. The average temperature settles at a cozy 24°C (76°F), offering a pleasant respite amidst frequent afternoon showers. This month sees minimal fluctuation compared to the previous months, showcasing a consistent climate that invites both locals and visitors to revel in the lush greenery and vibrant landscapes. As the rains nourish the diverse flora, September stands as a perfect time to experience the enchanting beauty of Tilaran with its tropical charm.
September in Tilaran, Costa Rica, is characterized by significant rainfall, with 265 mm (10.4 in) of precipitation falling over the course of 29 days. This month maintains the trend established by the rainy season, which saw a peak in August with 275 mm and a slight decline as October approaches, expected to exceed 385 mm. The nearly continuous downpours of September contribute to the lush, vibrant landscape typical of this region, emphasizing the monsoonal patterns that dominate these months. While the rain may deter some outdoor activities, it nurtures the rich flora, reinforcing Tilaran's reputation as a tropical paradise.
In September, Tilaran, Costa Rica, experiences a significant dip in humidity compared to the intensifying moisture of July and August, which peak at 85% and 82% respectively. With humidity levels around 80%, September maintains a relatively high moisture presence but starts to shift towards a more comfortable range. The trend throughout the year reveals that as we transition from the dryer months of January to April, where levels hover around 63%, the humidity climbs steadily into the wetter months, peaking in the heart of summer. The subtle decline into October, with humidity at 79%, hints at the gradual return to lower humidity levels, creating a balanced weather pattern that is characteristic of Tilaran’s tropical climate.
In September, Tilaran, Costa Rica maintains a noteworthy UV Index of 13, which classifies the exposure level as extreme. With a consistent burn time of just 10 minutes, this month's sun exposure remains intense, reflecting the trends seen throughout the year. Interestingly, September continues the pattern established in the preceding months, where UV Index values hover around the extremes, peaking at 14 from March through July. Following this peak, a slight dip to 13 in both August and September indicates a subtle transition towards the later months, yet caution is still advised as this level of UV exposure can lead to sunburn within minutes. To stay informed and protected, check the latest updates at Tilaran UV Index.
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September in Tilaran, Costa Rica, brings 257 hours of sunshine, a slight dip from the lively summer months. This signals the transition into the wet season, where the sunny days become a bit more sporadic. While September’s hours are lower than the peak of 333 hours seen in March, it remains consistent with the generally bright weather pattern established earlier in the year. Notably, the sunshine tends to ebb towards October, which records the year’s least with 236 hours. Yet, September still offers ample opportunities for outdoor adventures amid the scenic beauty of Costa Rica, reminding visitors that even as the clouds gather, the tropical warmth can still be savored.
As September rolls into Tilaran, Costa Rica, the likelihood of enjoying sunny weather dwindles to a mere 11%. This substantial dip follows a gradual decline throughout the rainy season, which sees its peak in August with only 7% chance of sunshine. The trend is quite striking as it marks a significant contrast to the sunny start of the year; January offers a robust 42% chance of clear skies, and December even rises back to 44%. Clearly, September signals the deep embrace of the rainy season, where travelers should prepare for overcast skies and the refreshing embrace of tropical rainfall.
In Tilaran, Costa Rica, September offers a delightful 12 hours of daylight, maintaining the mid-year trend that peaks during the summer months. As the year unfolds, daylight stretches between 11 hours in the early and late months and expands to a consistent 12 hours from March through September. This stable duration not only provides ample time for exploration and outdoor activities but also highlights the region’s proximity to the equator, where daylight hours remain remarkably uniform throughout the year. As September wraps up, daylight begins to taper off, preparing for the shorter days of October.
In September, the winds in Tilaran, Costa Rica settle into a gentle whisper, with an average speed of 1.6 m/s (4 mph). This marks a continuation of August's calm, as both months exhibit similar breezy conditions. The pattern reveals a noticeable dip in wind strength from the lively breezes of early spring, where winds reached up to 4.5 m/s (10 mph) in March. Following this peak, the winds gradually softened through late summer, hinting at the onset of the rainy season. In contrast to the more dynamic months preceding it, September's tranquil winds create an idyllic atmosphere, enveloping Tilaran in a serene embrace as the transition into autumn unfolds.
Weather in Tilaran varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Tilaran, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January offer distinct weather experiences. In September, temperatures range from a minimum of 20°C (69°F) to a maximum of 32°C (89°F), with an average of 24°C (76°F). This month is characterized by high humidity at 80% and significant rainfall, totaling 265 mm (10.4 in) spread over 29 days. In contrast, January presents milder conditions, with temperatures ranging from 15°C (60°F) to a maximum of 30°C (86°F) and an average of 23°C (74°F). Rainfall is dramatically reduced to just 27 mm (1.1 in) over only 6 days, and humidity drops to 66%. For more details on January weather in Tilaran, you can check Tilaran weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a minimum of 20°C (69°F) to a maximum of 32°C (89°F), with an average temperature of 24°C (76°F). However, this month sees significant rainfall, averaging 265 mm (10.4 inches) over 29 days, resulting in high humidity levels of around 80%. In contrast, February features slightly lower minimum temperatures at 18°C (64°F) and a similar average temperature of 24°C (75°F), but with a higher maximum reaching 33°C (91°F). Rainfall is minimal during February, with only 8 mm (0.3 inches) falling over just 1 day, and humidity levels are lower at 64%. For more details about February weather, you can check Tilaran weather in February.
When comparing the weather in September and March, one can observe distinct differences in both temperature and precipitation. September tends to be slightly warmer, with average temperatures around 24°C (76°F), peaking at 32°C (89°F), while March, although also averaging at 24°C (75°F), features a marginally lower minimum temperature of 18°C (64°F). Rainfall in September is significantly higher, with 265 mm (10.4 in) spread over 29 days, contrasting sharply with March's minimal 9 mm (0.4 in) over just 2 days. Additionally, humidity levels are notably higher in September at 80%, compared to March's 63%, resulting in a more humid and rainy atmosphere during the former month. For more details on March weather, you can check out Tilaran weather in March.
In comparing the weather between September and April, notable differences emerge. September features a minimum temperature of 20°C (69°F) and peaks at 32°C (89°F), with an average of 24°C (76°F). However, this month is characterized by high humidity at 80%, extensive rainfall totaling 265 mm (10.4 in) over 29 days. In contrast, April enjoys slightly cooler minimum temperatures at 18°C (65°F) but can reach up to 33°C (92°F), maintaining an average of 25°C (77°F). Rainfall in April is significantly less, with only 54 mm (2.1 in) over 11 days and humidity dropping to a more comfortable 63%. For a more detailed look at the weather patterns in April, you can check Tilaran weather in April.
September and May present distinctly different weather patterns, despite similarities in temperature. In September, temperatures range from a minimum of 20°C (69°F) to a maximum of 32°C (89°F), with an average of 24°C (76°F). However, this month is characterized by high humidity at 80% and significant precipitation, averaging 265 mm (10.4 in) over 29 days. In contrast, May offers slightly warmer temperatures, with an average of 25°C (77°F) and a peak of 33°C (91°F). While May also experiences notable rainfall, totaling 264 mm (10.4 in) over 25 days, the humidity is much lower at 63%. For a more detailed look at the May weather in Tilaran, you can check out Tilaran weather in May.
In September, the weather remains warm with a minimum temperature of 20°C (69°F) and an average of 24°C (76°F), similar to June's minimum and average. However, September tends to be slightly more humid at 80%, compared to June's 74%. While both months experience frequent rainfall, September sees a total of 265 mm (10.4 in) over 29 days, whereas June has 290 mm (11.4 in) of precipitation over 28 days. For a closer look at the weather patterns, you can check Tilaran weather in June. Overall, both months share warm temperatures, but September's increased humidity and rainfall create a distinctly muggy atmosphere.
In comparing the weather of September and July, both months exhibit similar temperature ranges, with minimums around 20°C (69°F) and averages of approximately 24°C (76°F). However, September tends to be slightly warmer, peaking at 32°C (89°F), compared to July's maximum of 31°C (88°F). Notably, September experiences significantly higher precipitation, with 265 mm (10.4 in) of rain over 29 days, whereas July sees only 159 mm (6.3 in) across 25 days. The humidity levels are consistently high in both months, hovering around 80% in September and 85% in July. For more detailed insights, check out this link: Tilaran weather in July.
In comparing the weather conditions of September and August, we see that both months share similar temperature ranges, with minimums of 20°C (69°F), average temperatures of 24°C (76°F), and maximums reaching up to 32°C (89°F in September and 90°F in August). However, September experiences slightly higher precipitation, with 265 mm (10.4 in) over 29 days, compared to August's 275 mm (10.8 in) over 26 days. Humidity levels are also marginally lower in September at 80%, compared to August's 82%. For a more detailed look at August's weather, you can visit Tilaran weather in August.
In September, temperatures range from a minimum of 20°C (69°F) to a maximum of 32°C (89°F), averaging around 24°C (76°F). The month sees significant rainfall, with a total precipitation of 265 mm (10.4 in) spread over 29 days, contributing to a humidity level of 80%.
In contrast, October maintains similar temperature averages, with a minimum of 20°C (68°F) and a maximum of 30°C (87°F). However, it experiences even higher precipitation, accumulating 385 mm (15.2 in) over the same number of days, while humidity drops slightly to 79%. For a more detailed look at the October weather, you can visit Tilaran weather in October.
In September, the weather is characterized by warm temperatures, with a minimum of 20°C (69°F) and an average of 24°C (76°F), peaking at 32°C (89°F). The month is also marked by significant rainfall, receiving around 265 mm (10.4 in) over 29 days, contributing to a high humidity level of 80%. Comparatively, November sees slightly cooler conditions, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 30°C (86°F). Precipitation decreases significantly to 159 mm (6.2 in) across 23 days, and humidity levels remain quite close at 79%. This shift results in a more comfortable atmosphere as November approaches, making it a favorable time for outdoor activities. For more details on the weather conditions, you can refer to Tilaran weather in November.
In September, the weather is warmer and more humid, with temperatures ranging from a minimum of 20°C (69°F) to a maximum of 32°C (89°F) and an average of 24°C (76°F). This month also experiences significant rainfall, accumulating 265 mm (10.4 inches) over 29 days, resulting in a humidity level of around 80%. In contrast, December sees slightly cooler temperatures, with a minimum of 18°C (65°F), an average of 23°C (74°F), and a maximum of 30°C (86°F). The precipitation decreases dramatically to just 57 mm (2.2 inches) over 14 days, leading to a more comfortable humidity level of 70%. For more detailed information about December weather, visit Tilaran weather in December.
In September, Tilaran experiences a distinct shift in its weather patterns compared to other months. The warmth lingers, with average temperatures hovering around a comfortable 24°C (76°F), yet the region is marked by significant precipitation, recording an impressive 265 mm over nearly the entire month. This consistent rainfall coupled with high humidity, reaching approximately 80%, creates a lush, vibrant landscape. While the maximum temperature can still peak at 32°C (89°F), the regular downpours transform the atmosphere, making September a wetter and more humid time of year. For further insights on what to expect throughout the year, visit Tilaran Climate.