Last updated: August 21, 2025
Experience the unique climate of Cartago, Costa Rica, in August, where temperatures reach a comfortable maximum of 25°C (78°F) and hover around an average of 18°C (65°F). With a minimum temperature of 14°C (57°F), the weather is pleasantly mild, ideal for exploring. However, be prepared for significant precipitation, as the region receives about 403 mm (15.9 in) over 30 days, resulting in lush greenery. The high humidity levels at 82% create a vibrant, tropical ambiance, perfect for immersing yourself in the breathtaking natural beauty and rich culture that Cartago has to offer.
In August, Cartago, Costa Rica enjoys a mild climate, with temperatures ranging from a minimum of 14°C (57°F) to a pleasant maximum of 25°C (78°F). The average temperature remains a steady 18°C (65°F), reflecting a consistent warmth throughout the month. This evidence of stability in temperature is characteristic of the region, as it does not fluctuate dramatically from the previous summer months. Notably, August continues the trend of comfortable conditions seen from late spring to early fall, making it an inviting time for visitors to experience the lush landscapes of Cartago. As the month progresses, you'll find that the warmth is accompanied by the refreshing charm of Costa Rica’s famed rainy season, enhancing the vibrant green scenery.
In August, Cartago, Costa Rica, experiences a significant surge in precipitation, marking one of the wettest months of the year with 403 mm (15.9 in) of rain spread across a remarkable 30 days. This consistent downpour not only contributes to lush landscapes but also follows the intense rainy patterns established in the preceding months. From May's peak of 532 mm to the steady rainfall in June and July, August continues to uphold the region's reputation as a prime example of Central America's vibrant rainy season. Just as the summer months transition into fall, the persistent rain in August sets the stage for an impressive shift in the ecosystem, fuelling the growth of diverse flora and fauna, while reminding residents and visitors alike of nature's powerful rhythms.
In Cartago, Costa Rica, August brings a moderate humidity level of 82%, slightly lower than the peak of 85% experienced in July but still indicative of the region's character during the rainy season. This month typically marks the tail end of a humid period that begins in June, where humidity levels sharply rise, reaching their yearly high. Following August, humidity begins to ease, gradually decreasing into the fall months of September and October. Overall, August's humidity remains a significant aspect of Cartago's climate, reflecting the lush, vibrant ecosystem nurtured by the moist air.
In August, Cartago, Costa Rica, continues to experience an extreme UV Index of 14, consistent with the trends seen throughout the previous months. This high level of UV radiation means that even minimal exposure can lead to a sunburn in just 10 minutes, urging residents and visitors alike to take precautions when enjoying the sunny outdoors. Over the course of the year, the UV Index in Cartago generally peaks during the dry months, specifically from March to April, but remains notably elevated throughout the summer. As August progresses into the rainy season, the UV levels remain worryingly high, emphasizing the need for effective sun protection. For more detailed information, check out the Cartago UV Index.
UV Risk Categories
In August, Cartago, Costa Rica, basks in 222 hours of sunshine, marking a slight dip from the preceding months of May through July, which also saw lower totals around the 220-hour range. This trend reflects a pattern of gradual decline in daylight hours as the year progresses, particularly evident as the region transitions towards the rainy season. Interestingly, the total sunshine in August aligns closely with September's count of 219 hours, indicating that the cloud cover begins to settle in after the sunnier summer months. However, as the year wraps up, there's a notable rebound in sunshine, with December boasting an impressive 300 hours, suggesting that while August may be a transitional month, the vibrant sun returns with force as the festive season approaches.
When considering the likelihood of sunny weather in Cartago, Costa Rica in August, it's important to note the significant dip in sunshine, with only a 5% chance for bright skies. This contrast becomes evident when looking at trends throughout the year; while the first half of the year enjoys more favorable conditions—peaking in January with a 54% chance—the months leading into August experience a sharp decline. As the rainy season settles in from April onwards, the chances of sunshine drop drastically, making August one of the least favorable months for sun-seekers. Those planning a visit should be prepared for overcast skies and persistent rain rather than basking in sunlight.
In Cartago, Costa Rica, the daylight duration remains impressively consistent throughout the year. While January and February greet the year with 11 hours of daylight, a gradual increase begins in March, peaking at 12 hours from April through September. This extended daylight offers vibrant opportunities to explore the lush landscapes and vibrant culture of Cartago during the warmer months. As October arrives, daylight once again shifts down to 11 hours, mirroring the early months of the year, while November and December follow suit, closing the year with a return to shorter days. Overall, this consistent daylight pattern provides a stable rhythm for both residents and visitors, making Cartago a wonderfully predictable destination for enjoying the great outdoors.
In August, Cartago experiences its calmest winds of the year, with an average speed of just 1.1 m/s (2 mph). This gentle breeze marks a shift in the seasonal winds, as it follows a pattern of gradually decreasing speeds since April, where the winds were slightly stronger at 1.4 m/s (3 mph). The trend reveals a comparative lull in wind activity as the region nears the end of the dry season, leading into the wet season. Despite this drop, the soothing air can provide a tranquil atmosphere, ideal for enjoying the lush landscapes that define Cartago. As summer gives way to fall, the winds slowly begin to pick up again, but August remains a time of respite in the typically breezy climate of this charming Costa Rican city.
Weather in Cartago varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Cartago, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, the weather is generally warm and humid, with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 25°C (78°F). The month is characterized by heavy rainfall, receiving about 403 mm (15.9 in) over approximately 30 days, resulting in high humidity levels of 82%. In contrast, January offers a milder climate, with temperatures slightly cooler, ranging from 11°C (51°F) to 24°C (76°F) on average. Precipitation is significantly lower, with just 35 mm (1.4 in) falling over approximately 6 days, contributing to a more comfortable humidity level of 68%. For more details, check out Cartago weather in January.
August and February present a contrasting weather experience, despite having similar average temperatures. In August, temperatures range from a minimum of 14°C (57°F) to a maximum of 25°C (78°F), accompanied by high humidity at 82%. This month is quite wet, with a substantial 403 mm (15.9 in) of precipitation spread across 30 days, making it one of the rainiest times of the year. In contrast, February offers milder conditions with temperatures ranging from a minimum of 11°C (51°F) to a maximum of 25°C (76°F). The month boasts significantly lower precipitation at just 19 mm (0.8 in) over 5 days, and with humidity at 68%, it feels drier and more comfortable. For a detailed look at weather specifics, check Cartago weather in February.
When comparing the weather in August and March, both months share a similar average temperature of 18°C (65°F), with maximum temperatures reaching 25°C (78°F). However, August experiences significantly more precipitation, averaging 403 mm (15.9 in) over 30 days, which contrasts sharply with March's 28 mm (1.1 in) spread over just 6 days. Additionally, humidity levels in August are notably higher at 82%, compared to March's more comfortable 66%. For more specific details, you can check Cartago weather in March.
When comparing the weather in August and April, both months exhibit similar average temperatures, with August experiencing a range from 14°C (57°F) to 25°C (78°F), while April sees slightly lower temperatures, ranging from 13°C (55°F) to 26°C (78°F). However, April typically has less precipitation, averaging 155 mm (6.1 in) over 23 days compared to August's much wetter conditions, which result in 403 mm (15.9 in) over 30 days. Additionally, the humidity levels are notably higher in August at 82%, while April's humidity sits at a more comfortable 67%. For more detailed information on April weather, you can find it here: Cartago weather in April.
When comparing the weather in May and August, both months exhibit similar minimum and average temperatures, with May reaching a slightly higher maximum of 26°C (79°F) compared to August's 25°C (78°F). However, May experiences significantly more precipitation, totaling 532 mm (21.0 in) over 29 days, while August sees 403 mm (15.9 in) spread over 30 days. Additionally, humidity levels are notably higher in August at 82%, compared to May's 69%, making August feel more oppressive despite similar temperatures. For more details on the conditions in May, check out Cartago weather in May.
When comparing the weather in August and June, we notice that both months have similar temperature ranges, with minimums around 14°C (57°F), averages of 18°C (65-66°F), and maximums reaching 25°C (76-78°F). Precipitation levels are quite close as well, with August receiving slightly more rain at 403 mm (15.9 in) over 30 days, compared to June's 399 mm (15.7 in) over 29 days. Interestingly, humidity levels are slightly lower in August at 82%, while June has a higher humidity of 84%. For more detailed information, you can visit Cartago weather in June.
In comparing the weather between July and August, both months experienced similar minimum and average temperatures, with July slightly cooler at a maximum of 24°C (76°F) compared to August’s 25°C (78°F). However, August saw a significant increase in precipitation, totaling 403 mm (15.9 in) over 30 days, while July recorded 315 mm (12.4 in) over just 28 days. Humidity levels were also notably high in both months, with August at 82% and July a touch higher at 85%. For more detailed insights, you can check Cartago weather in July.
In comparing the weather between August and September, both months feature similar temperature ranges, with minimums at 14°C (57°F), averages at 18°C (65°F), and maximums reaching 25°C (78°F for August and 77°F for September). However, September experiences a noticeable increase in precipitation, totaling 508 mm (20.0 in) compared to August’s 403 mm (15.9 in), despite having the same number of rainy days—30. Additionally, humidity levels remain quite high, slightly decreasing from 82% in August to 81% in September. For more detailed information, you can explore Cartago weather in September.
August and October exhibit similar average temperatures, with August showing a slight edge in maximum temperature at 25°C (78°F) compared to October's 24°C (76°F). However, both months experience significant humidity, hovering around 82% in August and slightly lower at 80% in October. A notable difference lies in the precipitation levels; August receives 403 mm (15.9 in) of rain, while October sees an even higher total of 601 mm (23.7 in), making it one of the wetter months of the year. For a detailed look at October's weather patterns, you can check Cartago weather in October.
August and November weather show some similarities, but also notable differences. In August, the average temperature hovers around 18°C (65°F), with maximums reaching up to 25°C (78°F) and humidity at a high 82%. Precipitation is significant during this month, totaling 403 mm (15.9 in) over 30 days. In contrast, November maintains a similar average temperature of 18°C (64°F) but features slightly lower maximum temperatures at 24°C (75°F) and reduced humidity at 80%. Additionally, November experiences less rainfall, with 272 mm (10.7 in) over 26 days. For further details about the weather in November, you can check Cartago weather in November.
In comparing the weather between August and December, we see notable differences in temperature and precipitation. August features a wider temperature range, with minimums around 14°C (57°F) and maximums reaching up to 25°C (78°F), alongside significant rainfall totaling 403 mm (15.9 in) over 30 days and high humidity levels at 82%. In contrast, December experiences slightly milder temperatures, with minimums around 12°C (54°F) and maximums peaking at 24°C (75°F). The month is much drier, with only 78 mm (3.1 in) of rain over 11 days and a lower humidity of 72%. For more details on the weather specific to this month, you can refer to Cartago weather in December.
In August, Cartago experiences a distinct shift in weather, characterized by higher humidity and persistent rainfall that sets it apart from the drier months. With temperatures averaging a comfortable 18°C (65°F), the air feels refreshingly cool amid the frequent downpours, as 403 mm of rain falls over the month. This blend of warmth and moisture creates a lush landscape, making August a vibrant time to explore the natural beauty of the region. For those interested in understanding more about how August weather fits into the broader climatic picture, please visit Cartago Climate.