Last updated: August 21, 2025
Experience the vibrant climate of Atenas, Costa Rica in August, where temperatures typically reach a maximum of 30°C (85°F), with a pleasant average of 23°C (74°F) and a comfortable minimum of 19°C (66°F). This month is characterized by its high humidity level of 82%, which enhances the tropical ambiance. However, be prepared for frequent rain, as the region sees a substantial 393 mm (15.5 in) of precipitation spread over 30 days, making August a lush and green time to explore the stunning landscapes of Atenas. Whether you're seeking adventure or relaxation, the dynamic weather sets the stage for memorable experiences.
In Atenas, Costa Rica, August temperatures reflect the region's tropical climate, showcasing a pleasant mix of warmth and mildness. With a minimum temperature around 19°C (66°F) and a maximum reaching 30°C (85°F), the month strikes a comfortable balance, making it ideal for outdoor activities. The average temperature hovers around 23°C (74°F), similar to several preceding months, yet slightly lower than the warmer peak of March. Rainfall increases as the rainy season progresses, but the temperatures remain pleasantly warm. August continues the trend of stable, inviting temperatures throughout the year, offering visitors a delightful climate perfect for exploring the lush landscapes of this beautiful destination.
In Atenas, Costa Rica, August marks a significant peak in rainfall, with an impressive 393 mm (15.5 in) of precipitation falling across the month. This month, along with the preceding months of May and June, contributes to the region's reputation for a lush, vibrant landscape during the rainy season. With rainfall occurring on 30 days, August mirrors the extended wetness of summer, creating a verdant backdrop while challenging outdoor activities. This trend continues into September, which sees even higher precipitation levels, reaching 461 mm (18.2 in). The pattern of increased rainfall from May through October highlights the region’s striking climatic transition, illustrating Atenas' commitment to a richly green environment despite the frequent downpours.
In Atenas, Costa Rica, the humidity levels showcase a notable trend as the year progresses. Starting the year at a comfortable 68% in January and February, humidity dips slightly in March before rising steadily with the arrival of the rainy season. By June, humidity soars to a significant 84%, peaking at 85% in July. In August, humidity remains high at 82%, bringing a tropical intensity that defines the region's lush landscapes. As the year leisurely transitions into the cooler months, humidity begins to dip again, settling at 80% from September through November and further declining to 72% by December. This rhythmic fluctuation not only underscores Atenas's lush greenery but also highlights the region's inviting climate throughout the year.
In August, Atenas, Costa Rica, experiences a UV Index of 13, maintaining its ranking in the extreme exposure category with a burn time of just 10 minutes. This month continues the trend established earlier in the year, where UV levels remain consistently high, peaking at 15 in March and April. The overall pattern indicates that residents and visitors alike should prioritize sun protection throughout the year as the UV Index fluctuates slightly but largely stays in the extreme range. For more detailed information on UV exposure, check out Atenas UV Index.
UV Risk Categories
August in Atenas, Costa Rica, offers a delightful average of 213 hours of sunshine, marking a continuation of the region's sun-drenched charm. After a peak in March with 329 hours of radiant light, the summer months show a gradual decline, yet August holds its own amidst fluctuating rays. Following a modest July, which recorded 209 hours, the sunshine begins to rebound slightly in August, just ahead of the rainier September, which boasts 230 hours. Overall, the trend indicates a warm embrace of sunshine with a slight dip during the mid-year months, making Atenas an inviting spot for sun lovers even in late summer.
In Atenas, Costa Rica, the likelihood of sunny weather takes a noticeable dip in August, plummeting to just 7%. This trend is part of a broader rainy season pattern that begins as spring fades, with April (24%) and May (17%) already showing significant cloud cover. As the summer months progress into July (19%) and August, the chances of sunlight continue to diminish, hitting a low in this month. For those seeking sunny days, it’s wise to consider earlier in the year, as the sun shines brightly in January and December, with chances soaring above 50%. Overall, if you're looking to bask in the sun while in Atenas, August might not be your best bet!
In Atenas, Costa Rica, the daylight duration in August remains consistent, providing about 12 hours of sunlight each day. This pattern reflects a broader trend observed throughout the year, where the central months from March to September enjoy an abundance of daylight, peaking at 12 hours. As the year transitions towards November, daylight gradually declines to 11 hours, echoing the change in seasons. The steady 12-hour daylight in August invites outdoor activities and highlights the region's tropical charm, making it an ideal time for both residents and visitors to bask in the beauty of this vibrant destination.
In August, Atenas, Costa Rica, experiences some of its calmest winds, with an average speed of 1.1 m/s (about 3 mph). This trend of gentle breezes continues a subtle decline that started in the late spring, where wind speeds slowly tapered from a modest 2.1 m/s in March down through the summer months. While the lush, vibrant environment of Atenas remains unaffected by these lighter winds, August's tranquility provides an ideal backdrop for relaxation and enjoying nature’s beauty. As the month progresses toward September, the winds slightly regain their strength but never quite reach the breezy heights of earlier months, making late summer a serene time to experience this charming town.
Weather in Atenas varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Atenas, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of August and January, one can observe notable differences in temperature, precipitation, and humidity. August typically experiences a minimum temperature of 19°C (66°F) and a maximum of 30°C (85°F), with an average temperature of 23°C (74°F). It is marked by high humidity at 82% and substantial rainfall, recording 393 mm (15.5 in) over 30 days. In contrast, January has slightly cooler minimum temperatures at 17°C (63°F) and a maximum of 31°C (87°F), maintaining the same average of 23°C (74°F). However, it is much drier, with only 28 mm (1.1 in) of rainfall over just 7 days and a lower humidity of 68%. This makes January a more favorable time for outdoor activities, whereas August's heavy rain can lead to more indoor pursuits. For more specific details about weather conditions during January, you can refer to Atenas weather in January.
In comparing the weather of August and February, notable differences arise in temperature and precipitation levels. August experiences a minimum temperature of 19°C (66°F) and a maximum of 30°C (85°F), with the average around 23°C (74°F). This month is characterized by high humidity at 82% and significant rainfall, accumulating 393 mm (15.5 in) over 30 days. In contrast, February has a slightly milder minimum temperature of 16°C (62°F) and a higher average temperature of 24°C (76°F), peaking at 31°C (88°F). February is notably drier, with only 13 mm (0.5 in) of rainfall spread across just 3 days and a lower humidity level of 68%. For an in-depth look at February’s conditions, you can visit Atenas weather in February.
In comparing the weather of August and March, August typically presents warmer temperatures with a daily average of 23°C (74°F) and maximums reaching up to 30°C (85°F). In contrast, March boasts slightly higher average temperatures at 25°C (77°F), but it can peak at a warmer 32°C (89°F). However, August is characterized by significantly higher precipitation, totaling 393 mm (15.5 in) over 30 days, while March experiences only 18 mm (0.7 in) of rain across just 4 days, making it a much drier month. Additionally, humidity levels are noticeably higher in August at 82%, compared to the more comfortable 66% in March. For a closer look at what to expect, check out Atenas weather in March.
When comparing the weather in August and April, we find distinct differences in temperature, precipitation, and humidity. In August, the temperatures range from a minimum of 19°C (66°F) to a maximum of 30°C (85°F), with an average of 23°C (74°F). This month also experiences significant rainfall, totaling 393 mm (15.5 in) over 30 days, resulting in a high humidity level of 82%. In contrast, April has slightly warmer temperatures, with a minimum of 18°C (64°F) and a maximum of 31°C (89°F), averaging 24°C (76°F). However, it sees much less precipitation, at 118 mm (4.6 in) across 24 days, and lower humidity levels at 67%. For more detailed information about April's weather, you can visit Atenas weather in April.
August and May exhibit similar temperature ranges, both featuring minimums around 19°C (66°F - 67°F) and maximums reaching up to 30°C (85°F - 86°F). However, May tends to be slightly warmer on average, with temperatures peaking at around 24°C (75°F) compared to August's average of 23°C (74°F). In terms of precipitation, both months see considerable rainfall, with May receiving 412 mm (16.2 in) versus August's 393 mm (15.5 in). Notably, humidity levels in August are higher at 82%, compared to May’s 69%, creating a more oppressive atmosphere in late summer. For more details, you can check out Atenas weather in May.
In comparing the weather of August and June, we see that both months share similar temperature ranges, with minimums around 19°C (66°F) and maximums reaching 30°C (85°F in August and 86°F in June). However, June has a slightly higher average temperature at 24°C (75°F) compared to August's 23°C (74°F). Precipitation levels are quite close, with June receiving 397 mm (15.6 in) and August 393 mm (15.5 in), both spread over approximately 30 days. Humidity is also fairly comparable, with June at 84% and August a notch lower at 82%. For a more detailed look at June's climate, you can refer to Atenas weather in June.
In comparing the weather between July and August, it's evident that both months share similar minimum temperatures, with July slightly warmer on average at 24°C (75°F) compared to August's average of 23°C (74°F). However, August experiences a slight increase in maximum temperatures, reaching up to 30°C (85°F), while July peaks at 29°C (85°F). Precipitation levels are notably higher in August, with 393 mm (15.5 in) of rain compared to July's 296 mm (11.7 in), given that both months have a consistent number of rainy days at 30. Additionally, humidity remains high in both months, though it is slightly lower in July at 85% compared to August's 82%. For a more in-depth look at rain patterns, you can check Atenas weather in July.
In comparing August and September weather, both months exhibit a similar average temperature of 23°C (74°F), with slight variations in minimum and maximum temperatures. August experiences a minimum of 19°C (66°F) and a maximum of 30°C (85°F), whereas September has a slightly lower minimum of 18°C (66°F) and a maximum of 29°C (85°F). However, September sees an increase in precipitation, totaling 461 mm (18.2 in) over 29 days compared to August's 393 mm (15.5 in) across 30 days. Humidity levels remain relatively constant, with August at 82% and September at 81%. For a more detailed look at September weather, visit Atenas weather in September.
August and October both experience warm temperatures, with average highs around 23°C (74°F) and 29°C (84°F) respectively. While August’s minimum temperature is slightly higher at 19°C (66°F), October maintains a similar minimum at 18°C (66°F). Notably, October sees a significant increase in precipitation, reaching 639 mm (25.2 in) compared to August's 393 mm (15.5 in), despite both months having 30 days of precipitation. Humidity levels also remain high, with August at 82% and October slightly lower at 80%. For more details on October weather in Atenas, you can visit Atenas weather in October.
In August, the weather is notably warmer, with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 30°C (85°F), while November sees slightly cooler temperatures, with a minimum of 18°C (64°F) and a maximum of 29°C (85°F). Both months average around 23°C (74°F), but August experiences significantly higher precipitation at 393 mm (15.5 in) over 30 days compared to November's 251 mm (9.9 in) over 28 days. Humidity levels are also slightly higher in August at 82%, while November maintains a humidity of 80%. For a more detailed look at weather conditions specific to November, you can check Atenas weather in November.
In August, the weather is characterized by warmer temperatures, with a minimum of 19°C (66°F) and a maximum reaching up to 30°C (85°F). This month experiences significant rainfall, averaging 393 mm (15.5 in) over 30 days, coupled with high humidity levels at 82%. In contrast, December features slightly cooler temperatures, with a minimum of 18°C (65°F) and a maximum of 30°C (86°F), but much less precipitation at 72 mm (2.8 in) over 18 days. Humidity also decreases to 72%, making December a more pleasant time for outdoor activities. For a detailed overview of the weather conditions in that month, you can check Atenas weather in December.
August in Atenas presents a unique weather experience, characterized by warm temperatures and significant rainfall that sets it apart from the drier months. While daytime warmth lingers with highs reaching around 30°C, the humidity intensifies, creating a tropical atmosphere that can feel sultry. This month sees the most precipitation, often resulting in a lush, vibrant landscape, though it also means frequent rain showers—perfect for those who enjoy the refreshing embrace of nature. Visitors will find that August's weather offers a captivating blend of tropical warmth and revitalizing downpours, inviting exploration of Atenas’ stunning surroundings. For more detailed insights, check out Atenas Climate.