Last updated: August 21, 2025
In Jaco, Costa Rica, August ushers in warm and humid conditions, with temperatures averaging around 27°C (80°F). The maximum temperatures can reach up to 28°C (83°F), while the nights cool down to a minimum of 25°C (77°F). This month marks the height of the rainy season, characterized by significant precipitation totaling 495 mm (19.5 in), spread across 30 days of rainfall. With humidity levels soaring at 82%, visitors can expect a tropical experience filled with vibrant greenery and lush landscapes, making Jaco an inviting yet wet destination during this time of year.
In August, temperatures in Jaco, Costa Rica, continue to embody the region’s tropical charm, with a consistent minimum of 25°C (77°F) and an average hovering around 27°C (80°F). The warmth peaks at a maximum of 28°C (83°F), slightly cooler than the summer months that precede it. This trend illustrates a gradual drop in temperature from the hotter months of June and July, where highs reach up to 29°C (85°F). As the rainy season progresses, August welcomes more cloud cover and periodic showers, creating a lush landscape while maintaining comfortable warmth for beach lovers and adventure seekers alike.
August is a pivotal month for precipitation in Jaco, Costa Rica, with an impressive total of 495 mm (19.5 in) of rainfall, marking it as the wettest month of the year. The consistent deluge is mirrored by an abundance of rain-soaked days, as August witnesses 30 days of rain. This trend of abundant precipitation follows a summer of rain, peaking from May to August, which enhances the lush green landscapes that Costa Rica is famed for. While the previous months of June and July also delivered significant rainfall—393 mm (15.5 in) and 358 mm (14.1 in) respectively—the stark rise in August underscores the intensity of the rainy season. Following August, precipitation begins to slightly decline but remains high through September and October, creating a seasonal rhythm that farmers and nature enthusiasts alike eagerly anticipate.
In Jaco, Costa Rica, August brings a notable shift in humidity levels, with an average of 82%. This marks a slight decrease from the peak of 85% experienced in July, but remains significantly higher than the 68% to 69% range typical at the year's start. As the rainy season progresses, the high humidity persists, aligning closely with the humidity levels seen in June. With September and October following closely behind at 81% and 80%, respectively, August serves as a transitional month where both warmth and moisture dominate the tropical climate, inviting visitors to immerse themselves in the lush, vibrant surroundings of this beautiful coastal town.
In August, Jaco, Costa Rica, continues to bask in the high solar intensity characteristic of its tropical climate, with a UV Index of 13 and an extreme exposure category. This trend of elevated UV levels seen in recent months emphasizes the need for sun safety, as the burn time remains a swift 10 minutes. From January to May, and again from July to September, residents and visitors alike should be particularly vigilant during their outdoor activities. With consistency in the extreme UV ratings throughout the summer, taking precautions against sun damage is crucial. For more detailed insights on Jaco's UV Index, check out Jaco UV Index.
UV Risk Categories
August in Jaco, Costa Rica, marks a gentle transition in the sun’s embrace, offering 238 hours of sunshine. While this is a decline from the peak brightness of earlier months—most notably March's impressive 332 hours—August still presents a delightful warm glow, inviting visitors to enjoy beach days and vibrant sunsets. As the rainy season sets in, sunlight dances playfully among the clouds, providing a refreshing balance against the lush backdrop of the region. Notably, the trend throughout the year shows a steady ebb and flow of sunshine, with February and March standing out as the sunniest months. So, even in August, Jaco continues to bask in a captivating charm that keeps summer alive.
In Jaco, Costa Rica, August marks a significant dip in the likelihood of sunny weather, with only a 6% chance of sunshine gracing the skies. This trend highlights the region's shift towards its rainy season, as the probability of clear days plummets from a more favorable 25% in April to nearly nonexistent by mid-year. The summer months of June and July also reflect a similar pattern, both hovering around 16-17% for sunny weather. As August approaches, the lush landscapes thrive under the nourishing rains, yet sun seekers may want to plan their visits for other months when the chances of bright, sunny enjoyment soar—like the 54% in January and February or the 58% in March.
In Jaco, Costa Rica, August enjoys a consistent 12 hours of daylight, a pattern that remains steady throughout the three months preceding and following it. This enduring daylight aligns with the region's tropical climate, offering ample time for outdoor activities and exploration. As the year progresses from January to July, daylight gradually increases from 11 hours to a peak of 12 hours, providing long, sun-filled days. However, with September looming, daylight holds at this generous length before tapering to 11 hours in the final months of the year. This rhythmic cycle of daylight not only enhances the vibrant local lifestyle but also makes Jaco a year-round destination for sun-seekers and adventure lovers alike.
In August, Jaco, Costa Rica, experiences a noticeable shift in its breezy charm, with an average wind speed of 3.2 m/s (7 mph), making it the windiest month of the year. This gentle increase from the steady 2.6 to 2.8 m/s seen in the earlier months provides a refreshing contrast to the tropical warmth, inviting both surfers and beachgoers to embrace the invigorating air. Following this peak, the winds taper off slightly in September before returning to a more consistent pace in the months that follow. This trend highlights August as a unique time when the coastal town thrives on invigorating breezes, enhancing the laid-back yet vibrant atmosphere that Jaco is known for.
Weather in Jaco varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Jaco, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of August and January, both months experience relatively warm temperatures, with averages around 27°C (80°F). However, August is characterized by significantly higher humidity at 82% and much heavier rainfall, totaling 495 mm over 30 days. In contrast, January enjoys much drier conditions, with only 36 mm of rainfall over just 7 days and a lower humidity level of 68%. This makes January a more pleasant time for outdoor activities, while August tends to be quite wet. For more specific details about January weather in Jaco, you can check this link: Jaco weather in January.
In comparing the weather between August and February, August showcases a warm and humid climate, with temperatures averaging around 27°C (80°F) and high precipitation levels of 495 mm (19.5 in) spread across 30 days. The humidity lingers at a notable 82%, contributing to a muggy atmosphere. In contrast, February presents a slightly drier and more pleasant climate, maintaining similar average temperatures (27°C or 81°F) but with significantly less rainfall at just 12 mm (0.5 in) over 3 days. This month also features lower humidity levels at 68%, making it an ideal time for outdoor activities. For more details, you can check Jaco weather in February.
When comparing the weather in August and March, we observe marked differences in temperature and precipitation patterns. August typically has a minimum temperature of 25°C (77°F), averaging around 27°C (80°F) and reaching a maximum of 28°C (83°F). It is characterized by high humidity (82%) and significant rainfall, with precipitation totaling 495 mm (19.5 in) over 30 days. In contrast, March features slightly higher temperatures, with a minimum of 25°C (77°F), average of 28°C (82°F), and a maximum of 29°C (85°F). However, it experiences vastly reduced rainfall, accumulating only 13 mm (0.5 in) over just 3 days, and lower humidity at 66%. For more details about the weather in March, you can check Jaco weather in March.
When comparing the weather in August and April, both months exhibit warm temperatures, with average highs around 27°C (81°F) in April and 28°C (83°F) in August. However, April tends to have slightly higher maximum temperatures, reaching up to 29°C (85°F), while August remains a bit cooler. A significant difference is observed in precipitation; August experiences a substantial amount of rainfall, averaging 495 mm (19.5 in) over 30 days, whereas April has markedly less with only 130 mm (5.1 in) over 21 days. Additionally, humidity levels in August are notably higher at 82%, compared to April's 67%. For more detailed information about the weather in April, you can visit Jaco weather in April.
In comparing the weather between August and May, both months experience similar average temperatures, with May slightly cooler on average. August sees a maximum temperature of 28°C (83°F), while May can reach up to 29°C (84°F). However, August is characterized by significantly higher precipitation, totaling 495 mm (19.5 in) compared to May's 474 mm (18.7 in), despite both months having rainfall over 30 days. Moreover, humidity levels are higher in August at 82%, contrasted with May's 69%, suggesting that August is not only wetter but also more humid. For a closer look at the weather conditions in May, you can visit Jaco weather in May.
In comparing the weather of August and June, we see that both months have similar average temperatures, ranging from a minimum of 25°C (77°F) to an average of 27°C (80°F). However, August tends to be slightly cooler at its maximum, peaking at 28°C (83°F), while June reaches up to 29°C (84°F). Rainfall is significantly higher in August, with 495 mm (19.5 in) spread over 30 days, compared to June's 393 mm (15.5 in) across 29 days. Humidity levels are fairly close in both months, with August at 82% and June slightly higher at 84%. For more details about June weather, you can visit Jaco weather in June.
In comparing the weather of August and July, we see that both months have similar temperature ranges, with minimums around 25°C (77°F) and average temperatures averaging 27°C (80°F). However, August is slightly cooler with a maximum temperature of 28°C (83°F), compared to July's 29°C (84°F).
Precipitation levels reveal a notable difference; August experiences significantly higher rainfall, accumulating 495 mm (19.5 in) over 30 days, while July sees 358 mm (14.1 in) during the same period. Humidity is also quite high in both months, with August at 82% and July slightly higher at 85%. For a closer look at the specifics of July's weather, you can check Jaco weather in July.
In comparing the weather between August and September, we can see some notable similarities and slight differences. Both months have a minimum temperature of 25°C (77°F) and a maximum temperature peaking at 28°C (83°F), with average temperatures hovering around 27°C (80°F) in August and slightly cooler at 26°C (80°F) in September. Precipitation is slightly lower in September at 461 mm (18.2 in), compared to August's 495 mm (19.5 in), though both months experience rain on nearly every day of the month. Humidity levels remain high, with August at 82% and September at a slightly lower 81%. For more specifics about September weather, you can check Jaco weather in September.
In comparing the weather between August and October, we see some similarities and notable differences. Both months feature daily high temperatures reaching a maximum of around 28°C (82°F) and a minimum of 25°C (77°F), with average temperatures slightly cooler in October at 26°C (79°F), compared to 27°C (80°F) in August. However, October experiences significantly higher precipitation with 638 mm (25.1 in) over the month, contrasted with August's 495 mm (19.5 in). Humidity remains relatively constant, hovering around 82% in August and slightly decreasing to 80% in October. For further details on October weather, check out Jaco weather in October.
In comparing the weather of August and November, both months feature similar temperature ranges, with August having a minimum of 25°C and an average of 27°C, while November maintains slightly lower averages, with a minimum of 25°C and an average of 26°C. However, August experiences significantly higher precipitation, with 495 mm over 30 days compared to November's 303 mm over 26 days. Additionally, humidity levels remain high in both months, at 82% in August and 80% in November, creating a consistently tropical environment. For more details on what to expect, you can check Jaco weather in November.
In August, the weather is marked by high humidity at 82%, with temperatures ranging from a minimum of 25°C (77°F) to a maximum of 28°C (83°F) and an average of 27°C (80°F). This month sees significant rainfall, accumulating to 495 mm (19.5 in) over 30 days, making it one of the wetter months of the year. In contrast, December features slightly higher maximum temperatures, peaking at 29°C (84°F) while maintaining an average of 27°C (80°F). The humidity drops to 72%, and precipitation is considerably less at 125 mm (4.9 in) over 16 days, creating a more pleasant, drier atmosphere. For those interested in the specifics of Jaco's climate during this month, detailed information can be found at Jaco weather in December.
August in Jaco offers a distinct weather experience, characterized by its warm temperatures and heightened humidity levels. Unlike other months, it embraces a wetter climate, marked by frequent rainfall that brings the area's lush landscapes to life. With average temperatures hovering around a comfortable 27°C (80°F), visitors can expect a tropical atmosphere; however, the 82% humidity can make it feel warmer. The nearly 30 days of precipitation contribute to a vibrant environment, ideal for those who appreciate a lush, green backdrop and the soothing sounds of tropical rain. For more detailed insights into the climate of this beautiful region, check out Jaco Climate.