Last updated: August 21, 2025
In August, San Jose, Costa Rica experiences a mild climate, with temperatures typically ranging from a minimum of 15°C (59°F) to a pleasant maximum of 26°C (79°F). The average temperature rests at 19°C (66°F), creating an inviting atmosphere for visitors. However, be prepared for a wet month, as precipitation totals around 304 mm (12.0 in) over approximately 28 rainy days, contributing to an overall humidity of 82%. This combination of warmth and moisture results in lush landscapes and vibrant scenery, making August a unique time to explore the rich natural beauty of Costa Rica's capital.
In August, San Jose, Costa Rica experiences mild and consistent temperatures, typically ranging from a minimum of 15°C (59°F) to a maximum of 26°C (79°F). The month maintains an average temperature of 19°C (66°F), similar to the previous months, underscoring the region’s stable climate. This consistent warmth is a hallmark of the dry season, where visitors can enjoy pleasant days without extreme temperature fluctuations. While the evenings remain cool, the air retains a refreshing quality, making August a delightful time to explore the city’s vibrant culture and breathtaking landscapes.
In August, San Jose, Costa Rica, experiences significant rainfall, with an average precipitation of 304 mm (12.0 in) over 28 days. This month continues the trend of the rainy season, following the peak of May, which records the highest rainfall of the year. As the wettest months approach their climax, August stands out with a notable amount of precipitation, reflecting the lush greenery that envelops the city. While not as torrential as May or June, the consistent rain contributes to the overall moisture, ensuring that the surrounding landscapes thrive. As September follows, precipitation increases further, drawing nearly 379 mm (14.9 in), marking the transition from mid to late rainy season.
In August, San Jose, Costa Rica, experiences a notable humidity level of 82%, which is slightly lower than the peak months of June and July, where humidity soars to 84% and 85% respectively. This trend of increasing humidity from April through July suggests a significant wet season, typical of tropical climates. As the year progresses into September, humidity begins to taper off slightly to 81%, indicating a gradual transition towards the drier months. Overall, August's humidity marks a mid-point in the year, reflecting the lush and vibrant atmosphere that characterizes this beautiful region during the rainy season.
In August, San Jose, Costa Rica, continues to experience an extreme UV Index of 14, maintaining a consistent trend seen throughout the summer months. This persistent level of UV exposure means that, regardless of the month, residents and visitors alike should take caution, as only 10 minutes of direct sunlight can lead to skin damage. The UV Index remains high from January through October, with only slight dips in the fall and winter months, indicating the year-round intensity of the sun's rays in this tropical paradise. Staying informed and protected is key—learn more about safe sun practices at San Jose UV Index.
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August in San Jose, Costa Rica, offers a delightful continuation of the region's sunshine, averaging 236 hours of bright, golden rays. As summer transitions into the later months of the year, one can see a subtle dip in sunshine hours compared to the bustling months of March, which boasts an impressive 329 hours. Despite the minor reduction, August maintains a comfortable glow, easily outshining the earlier rainy months like June and July, with their lower averages of 244 and 229 hours respectively. This balance of sun and cloud ensures that while the days may shorten, the allure of San Jose remains vibrant and inviting, making it an ideal time for exploration and enjoyment amidst the lush landscapes.
In August, the likelihood of experiencing sunny weather in San Jose, Costa Rica dramatically decreases, plunging to a mere 6%. This marks one of the steepest declines in the year, following a slight uptick in sunshine during July at 16%. As the region transitions into the wet season, the trend remains downward, with September and October also reflecting low probabilities of sun, hovering around 9% and 13%, respectively. This pattern highlights August as part of a notably rainy period, urging visitors to prepare for overcast skies and the refreshing kiss of tropical downpours rather than basking in bright sunshine.
In August, San Jose, Costa Rica enjoys a delightful average of 12 hours of daylight—consistent with the preceding months from March through July. This continuity in daylight duration creates a vibrant atmosphere, allowing residents and visitors alike to bask in the warm glow of tropical sunlight. As summer transitions to fall, the daylight begins to ebb slightly, returning to 11 hours in October. However, August stands out as part of a period where longer days reign supreme, making it a perfect time for outdoor adventures and exploration in this beautiful Central American city. The gradual change in daylight highlights the rhythmic dance of the seasons, offering a charming predictability that complements the lush landscape of Costa Rica.
In August, San Jose, Costa Rica experiences a notable dip in average wind speed, dropping to just 1.2 m/s (3 mph), the lowest of the year. This calmness contrasts sharply with the lively breezes of earlier months, such as January and February, when wind speeds hover around 2.4 m/s (5 mph) and 2.1 m/s (5 mph) respectively. The gradual decline in wind throughout the rainy season, from April to August, suggests a tranquil atmosphere that often accompanies this time of year. As the months transition towards November, wind speeds begin to rise again, hinting at a shift in the seasonal pattern. The overall trend showcases a gentle ebb and flow, capturing the serene essence of San Jose's climatic rhythm.
Weather in San Jose varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in San Jose, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present contrasting weather patterns. In August, temperatures range from a cool 15°C (59°F) at night to a warm 26°C (79°F) during the day, with an average of 19°C (66°F). This month is characterized by high humidity at 82% and substantial rainfall of 304 mm (12.0 in) over 28 days. In contrast, January sees slightly lower temperatures, with a minimum of 11°C (53°F), an average of 17°C (63°F), and a maximum of 24°C (76°F). The month is drier, featuring only 93 mm (3.7 in) of precipitation spread over 11 days, along with lower humidity at 68%. For more detailed information, check out San Jose weather in January.
When comparing the weather in August and February, August tends to be warmer and significantly wetter. With average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 26°C (79°F) and total precipitation of 304 mm (12.0 in) over 28 days, August experiences high humidity at 82%. In contrast, February features milder temperatures, with a minimum of 11°C (52°F) and a maximum of 25°C (78°F), accompanied by much lower precipitation of 43 mm (1.7 in) spread over just 12 days, along with a humidity of 68%. For more specific details, you can check San Jose weather in February.
When comparing the weather in August and March, it's evident that August is significantly wetter and more humid. In August, temperatures range from a minimum of 15°C (59°F) to a maximum of 26°C (79°F), with an average around 19°C (66°F). The month sees a high level of precipitation at 304 mm (12.0 in) over 28 days, resulting in a humidity level of 82%. In contrast, March features milder weather, with minimum temperatures around 11°C (53°F) and highs reaching 25°C (76°F), averaging 18°C (64°F). Precipitation is considerably lower at 49 mm (1.9 in) over just 14 days, contributing to a more comfortable humidity of 66%. For more detailed information on the weather specifics in San Jose during March, check out San Jose weather in March.
When comparing the weather in August and April, both months share a similar average temperature of 19°C (66°F) and a maximum temperature that reaches around 26°C (80°F). However, August is characterized by significantly higher humidity levels at 82%, compared to April's 67%. Additionally, August sees much more precipitation, with 304 mm (12.0 in) spread across 28 days, while April experiences only 113 mm (4.4 in) over 23 days. This makes August a much wetter month overall, providing a stark contrast to the relatively drier conditions of April. For more details on April weather, you can visit San Jose weather in April.
When comparing the weather in August and May, both months share similar average temperatures, with a range from 15°C to 26°C (59°F to 79°F). However, August tends to have slightly higher humidity at 82% compared to May's 69%. In terms of precipitation, May is notably wetter, receiving 425 mm (16.7 in) over 29 days, while August has 304 mm (12.0 in) across 28 days. For a detailed overview of May weather, you can visit San Jose weather in May.
In comparing the weather of August and June, we find both months share similar temperature ranges, with minimums at 15°C (59°F), average temperatures around 19°C (66°F in August and 67°F in June), and maximums reaching up to 26°C (79°F). However, June experiences slightly higher precipitation levels, totaling 341 mm (13.4 in) compared to August's 304 mm (12.0 in), despite both months having the same number of rainy days at 28. Additionally, humidity levels are slightly elevated in June at 84%, compared to 82% in August. For more details, you can visit San Jose weather in June.
In comparing the weather of August and July, we find that both months have similar minimum and average temperatures, consistently ranging from 15°C (59°F) to 19°C (66°F). However, August experiences slightly warmer maximum temperatures, averaging 26°C (79°F), compared to July's 25°C (77°F). Precipitation levels are notably higher in August, with a total of 304 mm (12.0 in) spread across 28 days, compared to July's 266 mm (10.5 in) over the same number of days. Additionally, humidity is marginally lower in August at 82%, while July sees a higher humidity level of 85%. For a more detailed look at July weather patterns, you can click on San Jose weather in July.
In comparing the weather of August and September, we see a slight dip in maximum temperatures, with August reaching a high of 26°C (79°F) and September peaking at 25°C (78°F). Both months share similar average temperatures of 19°C (66°F), but September tends to be wetter, recording 379 mm (14.9 in) of precipitation over 29 days compared to August's 304 mm (12.0 in) across 28 days. Humidity levels remain comparable, with August at 82% and September slightly lower at 81%. For more insights on the weather conditions in September, check out San Jose weather in September.
In August, the weather typically features a minimum temperature of 15°C (59°F) and reaches an average high of 26°C (79°F), with a significant amount of precipitation totaling 304 mm (12.0 in) over 28 days and humidity levels around 82%. In contrast, October sees slightly cooler temperatures, with a minimum of 14°C (58°F) and a maximum of 25°C (78°F). However, October is noticeably wetter, with precipitation peaking at 517 mm (20.4 in) spread over 29 days and humidity remaining relatively high at 80%. For more detailed information, you can check San Jose weather in October.
August and November exhibit similar temperatures, with August averaging slightly warmer at 19°C (66°F) compared to November's 18°C (65°F). Both months experience high humidity, hovering around 82% in August and 80% in November. However, August tends to be wetter, receiving 304 mm (12.0 in) of precipitation over 28 days, while November sees less rainfall at 260 mm (10.3 in) across 24 days. For more detailed insights, you can check San Jose weather in November.
In August, the weather is typically warmer and wetter compared to December, with minimum temperatures around 15°C (59°F) and average highs reaching 26°C (79°F). This month sees substantial rainfall, averaging 304 mm (12.0 in) over 28 days, coupled with high humidity levels of 82%. In contrast, December experiences slightly cooler temperatures, with minimums of 12°C (55°F) and maximums reaching 24°C (75°F). Precipitation also diminishes to 156 mm (6.1 in) across 16 days, accompanied by lower humidity levels of 72%. For a detailed overview of the December climate, check out San Jose weather in December.
August in San Jose brings a distinct shift in weather, characterized by its cooler temperatures and notably high humidity, with a marked increase in precipitation days. Compared to other months, this period is one of the wettest, making the landscape vibrant and lush, yet often damp. While daytime highs are moderate, the frequent rain creates a cozy atmosphere perfect for enjoying indoor pursuits or savoring a warm drink. If you're curious about how August's weather fits into the larger climatic picture, be sure to check out San Jose Climate.