Last updated: August 21, 2025
September in Escazu, Costa Rica is characterized by a warm yet comfortable climate, with daytime temperatures peaking at 27°C (80°F) and settling around an average of 20°C (69°F) at night. Visitors can expect a refreshing respite as temperatures dip to a minimum of 15°C (60°F). The month is notably wet, accumulating a substantial 436 mm (17.2 in) of rainfall across 28 days, resulting in an overall humidity level of 81%. This lush environment transformed by the rains offers a vibrant backdrop for those embracing the natural beauty of Costa Rica during this lush season.
In September, Escazu, Costa Rica experiences mild and pleasant temperatures that reflect a gentle transition into the rainy season. The minimum temperature hovers around 15°C (60°F), providing a comfortable start to the day. As the sun rises, it warms up to an average of 20°C (69°F), perfect for daytime activities, with a peak maximum temperature of 27°C (80°F) in the afternoons. This month typically sees a slight dip in maximum temperatures compared to previous months, signaling the onset of the wet season. Overall, September offers a delightful climate balanced between warmth and freshness, making it an ideal time for exploring the lush landscapes that begin to flourish with the rains.
In September, Escazu, Costa Rica, experiences a significant surge in precipitation, recording an impressive 436 mm (17.2 in) over 28 days of rain. This marks it as one of the wettest months of the year, following closely behind the even rainier October. The rainfall in September showcases a continued upward trend from the preceding months, particularly from the already substantial figures seen in August and July. This period of abundance reflects the region's transition into the peak of the rainy season, where lush landscapes thrive, and vibrant flora flourishes, inviting both locals and visitors to appreciate the raw beauty of tropical rain. As the skies open up, the rhythm of the rain becomes a backdrop to the lively pulse of life in Escazu, highlighting the dynamic interplay between nature and climate.
In September, Escazu, Costa Rica, experiences a humidity level of 81%, reflecting a slight drop from the peak of 85% in July. Throughout the year, humidity tends to rise significantly during the wet season, particularly in June and July, where it reaches its highest levels. As the months transition towards the end of the year, September maintains relatively high humidity, slightly more comfortable than the summer months yet still indicative of the region's tropical climate. Following September, humidity levels begin to stabilize, hovering around 80% in October and November, suggesting a gradual shift towards slightly drier conditions as the year closes. Overall, this trend emphasizes Escazu's climate variability, with September marking a pivotal point before the cooler months set in.
As we step into September in Escazu, Costa Rica, the UV Index holds steady at 13, categorizing the conditions as extreme and maintaining a consistent burn time of just 10 minutes. This level of UV exposure echoes trends from preceding months, with January through August all witnessing similar extremes in solar intensity. Notably, September’s values align closely with the trends set earlier in the year, particularly in August, suggesting that residents and visitors alike should remain vigilant about sun protection. With October projected to have an increase to 14, the need for protective measures will continue to be paramount. For more insights on the UV Index in this vibrant locale, visit Escazu UV Index.
UV Risk Categories
September in Escazu, Costa Rica, enjoys a delightful 230 hours of sunshine, a robust continuation of the region's vibrant weather patterns. As the rainy season gradually eases, the sun returns to grace this tropical paradise, offering a perfect balance between warm rays and refreshing breezes. This month reflects a consistent trend of sunshine that peaks in the early months of the year, with March leading at 329 hours, before tapering slightly into the late summer. The sunshine hours in September showcase a slight recovery from the lower totals seen in the preceding months, hinting at the approach of a more favorable dry season. Overall, the warm glow of September’s days contributes to the charm of Escazu, inviting both locals and visitors to bask in its beauty.
In September, Escazu, Costa Rica, experiences a notably low chance of sunny weather, with only an 8% likelihood of clear skies. This trend is part of a continued decline in sunshine throughout the rainy season, which begins in May and intensifies by August, where the chance of sun drops to a mere 6%. As September settles in, the region is typically enveloped in overcast conditions and frequent rain, making it one of the least favorable months for sun-seekers. Following this rainy period, the likelihood of sunshine starts to rebound in October, reaching 14%, but overall, September is characterized by its markedly gloomy and wet weather.
In Escazú, Costa Rica, September marks the continuation of a consistent rhythm in daylight duration, maintaining a steady 12 hours of sunlight. Following the lush green months of April through August, where daylight remains evenly balanced, September embraces a similar pattern, showcasing the region's tropical nature. This remarkable stability in daylight duration contrasts sharply with the shorter hours experienced as the year transitions into October, when daylight dips back to 11 hours. Overall, this harmonious cycle illuminates the dynamic yet predictable environment of Escazú as it gently flows between longer, sunlit days and the cozy embrace of evening.
In September, the winds in Escazu, Costa Rica continue their gentle, steady rhythm, averaging a light 1.2 m/s (3 mph). This slight increase from the calming breezes of August, which saw speeds of 1.1 m/s, reflects a transitional moment as the region slowly edges towards the more vibrant winds of the dry season. The overall trend captures a shift from the playful whispers of early summer to a more subdued calm before the approaching seasonal changes. As the year unfolds, Escazu's winds showcase a tendency toward a tranquil atmosphere, punctuated by occasional breezy spells that signify the impending transition into fall, ultimately culminating in the spirited gusts of December.
Weather in Escazu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Escazu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, September tends to be more humid and wetter, with an average temperature of 20°C (69°F) and significant precipitation of 436 mm (17.2 in) spread over 28 days. Conversely, January maintains a similar average temperature of 20°C (68°F) but enjoys much drier conditions, with only 32 mm (1.3 in) of rain falling over just 6 days. Additionally, January's humidity is lower at 68%, making it feel less muggy than September's humidity of 81%. For detailed insights, you can check Escazu weather in January.
September and February present contrasting weather profiles. In September, temperatures typically range from a minimum of 15°C (60°F) to a maximum of 27°C (80°F), while February showcases a similar average temperature of 20°C (69°F) but can reach up to 28°C (83°F). Notably, September sees significantly higher precipitation, with 436 mm (17.2 in) spread over 28 days, resulting in a notably humid environment at 81%. In contrast, February enjoys a much drier climate, with only 13 mm (0.5 in) of rain over just 3 days and a lower humidity level of 68%. For more detailed information, you can refer to Escazu weather in February.
September and March exhibit distinct weather patterns. In September, the average temperature ranges from a mild 15°C (60°F) to a warm 27°C (80°F), with a high level of humidity at 81%. This month also sees considerable rainfall, accumulating to 436 mm (17.2 in) over 28 days. In contrast, March features slightly higher average temperatures, from 14°C (57°F) to a maximum of 28°C (83°F), but with significantly less rainfall, totaling just 15 mm (0.6 in) over 4 days and lower humidity at 66%. For more detailed information, you can check Escazu weather in March.
When comparing the weather in September and April, both months exhibit similar minimum temperatures, around 15°C (60°F), but April tends to be slightly warmer overall with an average of 21°C (70°F) and a maximum of 29°C (85°F). In contrast, September is cooler on average at 20°C (69°F) with a maximum of 27°C (80°F). Additionally, September is significantly wetter, receiving 436 mm (17.2 in) of precipitation over 28 days, while April has much lighter rainfall with only 79 mm (3.1 in) spread across 16 days. The humidity is also higher in September at 81%, compared to 67% in April. For more detailed information, you can visit Escazu weather in April.
In comparing the weather of September and May, both months exhibit mild temperatures, but May generally feels a bit warmer, with an average temperature of 21°C (70°F) compared to September's 20°C (69°F). While September sees a higher maximum temperature of 27°C (80°F), May's peak reaches slightly higher at 28°C (83°F). Precipitation is quite significant in both months, with September receiving 436 mm (17.2 in) over 28 days, slightly more than May's 391 mm (15.4 in) across 27 days. Additionally, September has a higher humidity level at 81%, making it feel more muggy than May, which has a humidity of 69%. For more detailed information about weather conditions in May, you can refer to Escazu weather in May.
In comparing the weather between September and June, both months exhibit relatively mild temperatures, with September showing a minimum of 15°C (60°F) and an average of 20°C (69°F), while June starts slightly warmer with a minimum of 16°C (60°F) and an average of 21°C (70°F). The maximum temperatures for both months peak similarly at around 27°C (81°F). However, September experiences significantly higher precipitation, totaling 436 mm (17.2 in) spread over 28 days, compared to June's 351 mm (13.8 in) over 27 days. Furthermore, humidity levels remain high in both months, with September at 81% and June slightly higher at 84%. For a detailed overview, you can check Escazu weather in June.
When comparing the weather in September and July, we see some notable differences. September tends to be slightly cooler with a minimum temperature of 15°C (60°F) and an average of 20°C (69°F), while July has a minimum of 16°C (61°F) and an average of 21°C (69°F). Both months experience a maximum temperature of around 27°C (81°F). However, September is significantly wetter, with 436 mm (17.2 in) of precipitation over 28 days, compared to July's 233 mm (9.2 in) over 26 days. This results in a slightly higher humidity level in July at 85%, compared to 81% in September. For more detailed information about July weather, you can check Escazu weather in July.
In comparing the weather of September and August, both months display similar average temperatures, hovering around 20°C (69°F) with minimums and maximums close in range. However, September experiences slightly cooler minimum and maximum temperatures, with lows at 15°C (60°F) and highs of 27°C (80°F), while August sees a minimum of 16°C (60°F) and a maximum of 28°C (82°F). Notably, September has significantly higher precipitation, totaling 436 mm (17.2 in) over 28 days, compared to August’s 331 mm (13.0 in) over 26 days, resulting in a more humid environment in September with 81% humidity versus August’s 82%. For more detailed information on August weather, you can visit Escazu weather in August.
September and October weather shows notable similarities and differences. Both months share a temperature range with a minimum of 15°C (60°F), an average of around 20°C (69°F), and a maximum of 27°C (80°F). However, October tends to be slightly wetter, receiving 570 mm (22.4 in) of precipitation over 29 days, compared to September’s 436 mm (17.2 in) over 28 days. Despite this increased rainfall, humidity levels remain similar, with October at 80% and September at 81%. For a more detailed overview of October weather in the area, you can check this link: Escazu weather in October.
In comparing the weather between September and November, we see some noticeable differences. Both months have similar minimum and average temperatures, around 15°C (60°F) and 20°C (68°F), respectively. However, September experiences slightly warmer maximum temperatures reaching up to 27°C (80°F), while November peaks at 26°C (79°F). Precipitation is significantly reduced in November, with only 209 mm (8.2 in) over 19 days compared to September's 436 mm (17.2 in) over 28 days. This reduction in rainfall results in a marginally lower humidity level in November, at 80%, compared to September's 81%. For more detailed insights, you can check the link: Escazu weather in November.
In September, the weather is marked by a higher average temperature of 20°C (69°F), with maximums reaching up to 27°C (80°F) and a notably high humidity level of 81%. This month also experiences significant rainfall, with a total precipitation of 436 mm (17.2 in) spread over 28 days. In contrast, December features slightly cooler temperatures with a similar average of 20°C (68°F) but with maximums dipping to 26°C (80°F) and lower humidity at 72%. December also sees much less rain, with only 63 mm (2.5 in) of precipitation over 11 days. For more details on December weather, visit Escazu weather in December.
As September rolls into Escazu, the weather takes a notable turn. This month is characterized by high humidity levels and near-daily rainfall, making it one of the wettest times of the year. While temperatures remain mild, with an average around 20°C (69°F), the consistent precipitation introduces a lush vibrancy to the landscape that sets September apart from the drier months. It's a time when nature flourishes, though travelers should come prepared for the frequent showers that accompany this rainy season. For more insights into the weather patterns across the year, visit Escazu Climate.