Last updated: August 21, 2025
August weather in Alajuela, Costa Rica presents a vibrant tropical climate characterized by high humidity at approximately 82%. With maximum temperatures reaching 28°C (82°F) and averaging around 20°C (69°F), the month maintains a warm and inviting atmosphere. However, it is also notable for its significant rainfall, with an impressive 331 mm (13.0 in) of precipitation over 26 days. Visitors should be prepared for frequent showers, making August a lush and green time to experience the natural beauty of this region.
In August, Alajuela, Costa Rica experiences mild and pleasant weather, with temperatures showcasing a gentle transition as the month progresses. The minimum temperature hovers around 16°C (60°F), providing a comfortable start to the day, while the average temperature remains steady at 20°C (69°F). Daytime highs peak at approximately 28°C (82°F), perfect for outdoor adventures and exploring the region's lush landscapes. Compared to the previous months, August maintains a consistent warmth, with no dramatic fluctuations, creating an inviting atmosphere for both locals and travelers alike. As the cooler evenings approach, the blend of temperate days and refreshing nights makes this month an ideal time to revel in Alajuela's vibrant culture and natural beauty.
In August, Alajuela experiences a notable uptick in rainfall, with approximately 331 mm (13.0 in) of precipitation spread over 26 days. This marks a continuation of the rainy season, following the heavier downpours in May and June, which had 391 mm and 351 mm, respectively. The skies remain quite dynamic, with rainfall gradually building up as the months progress towards September, which averages 436 mm (17.2 in). This trend highlights August as a critical transition period, bridging the intense rains of early summer and the peak of the wet season, keeping the lush landscapes of Costa Rica vibrantly alive.
In August, Alajuela, Costa Rica experiences a notable increase in humidity, with levels reaching 82%. This month continues the trend set by the preceding rainy season, where humidity peaks significantly, peaking in June and July at 84% and 85%, respectively. The gradual drop in humidity from July to August signals a transition as the region moves towards the tail end of its wet season. Despite the decline, August maintains a high level of moisture in the air, contributing to the lush, vibrant landscapes that are characteristic of Costa Rica during this time of year. This humid environment not only enhances the natural beauty but also allows for thriving biodiversity, making August a unique period to experience the richness of Alajuela's flora and fauna.
In August, Alajuela, Costa Rica continues to experience an extreme UV Index of 13, maintaining a consistent pattern observed throughout the year. With a burn time of just 10 minutes, the sun's intensity remains potent, reminiscent of the earlier months from January to May, when readings peaked at 15. This trend highlights a sustained period of high UV exposure that emphasizes the importance of sun protection. As summer wanes, the UV Index shows slight fluctuations, dipping to 12 in November and 10 in December, offering a hint of relief as the year draws to a close. For those planning their travels or thinking about outdoor activities, staying informed is crucial—check the Alajuela UV Index for the latest updates.
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In August, Alajuela, Costa Rica experiences a delightful 213 hours of sunshine, a slight dip from the vibrant summer months of March and April, which boast the year's peak sunshine at 329 and 300 hours respectively. This pattern of abundant sunlight shifts dramatically as the year progresses, with February and March leading the pack before a gradual decline through the latter half of the year. Despite the drop in July to a modest 209 hours, August holds up admirably, bridging the gap as September brings a resurgence of 230 hours. Overall, Alajuela's sunshine story paints a picture of a tropical paradise where bright days are plentiful, especially in the lively early months while still holding charm during the late summer.
August in Alajuela, Costa Rica, brings a notable decline in sunny weather, with a mere 6% chance of clear skies. This month is part of the rainy season, where the likelihood of sun dwindles sharply from the sunnier months at the beginning of the year, like January's 52%. Following a consistent trend, August joins the ranks of September, which offers just an 8% chance, highlighting a pattern of increased precipitation. As the season progresses toward its peak rainfall, outdoor activities may require a bit more planning, but the lush landscapes and vibrant atmosphere during this time remain a captivating draw for visitors.
In August, Alajuela, Costa Rica, enjoys a consistent 12 hours of daylight, continuing the trend established in the preceding months of June and July. This duration reflects the region's unique positioning near the equator, where daylight remains relatively stable throughout the year. Following the longer days of summer, the daylight duration begins to taper off towards the end of the year, with October, November, and December slipping back to 11 hours. As the lush landscapes of Alajuela bask in this abundance of sunlight, August stands out as a peak period for outdoor activities, inviting both locals and visitors to fully embrace the vibrant beauty of the tropics.
In Alajuela, Costa Rica, the August winds offer a notable shift in the region's climatic rhythm. As the peak of the dry season settles in, the average wind speed dips to a gentle 1.1 m/s (3 mph), reflecting the calmness that often characterizes the month. This decrease follows a gradual decline from April's breezier 1.7 m/s (4 mph) and marks one of the lightest periods of the year, showing a clear trend towards stillness as the month unfolds. Interestingly, the winds pick up again in November, creating a refreshing contrast that sets the stage for a revitalizing end to the year. Overall, August is a serene chapter in Alajuela's weather story, where soft breezes embrace the landscape, inviting locals and visitors alike to bask in its tranquil ambiance.
Weather in Alajuela varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Alajuela, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present distinct weather patterns, reflecting the transition between the wet and dry seasons. In August, temperatures range from a minimum of 16°C (60°F) to a maximum of 28°C (82°F), accompanied by high humidity at 82%. This month experiences significant rainfall, with 331 mm (13.0 in) spread over an average of 26 days. In contrast, January sees slightly cooler temperatures, with a minimum of 13°C (56°F) and a similar maximum of 27°C (82°F). Rainfall in January is considerably lower, totaling just 32 mm (1.3 in) across about 6 days, and humidity is also reduced to 68%. For more detailed insights, you can explore the Alajuela weather in January.
In comparing the weather of August and February, both months exhibit similar average temperatures, hovering around 20°C (69°F). However, August is markedly more humid, with humidity levels reaching 82% compared to February's 68%. Additionally, August sees significantly more rainfall, with a total precipitation of 331 mm (13.0 in) over 26 days, while February experiences just 13 mm (0.5 in) in only 3 days, resulting in a much drier atmosphere. For a detailed view of February weather, you can check Alajuela weather in February.
When comparing the weather in August and March, you will notice some distinct differences. August showcases a more humid atmosphere with an average temperature of 20°C (69°F) and significant rainfall, totaling 331 mm (13.0 in) over 26 days. In contrast, March has a slightly warmer average temperature of 21°C (70°F) but experiences much less precipitation, with only 15 mm (0.6 in) over just 4 days and lower humidity at 66%. This makes March a relatively drier month, offering more consistent sunshine compared to the often wet and humid August. For more details about the weather in March, you can visit Alajuela weather in March.
When comparing the weather in August to that of April, we find some notable differences. August tends to be more humid, with an average humidity of 82% compared to April's 67%, creating a more oppressive atmosphere. While both months have relatively similar minimum temperatures (16°C in August and 15°C in April), April enjoys slightly warmer average temperatures, peaking at 29°C compared to August's maximum of 28°C. Rainfall is significantly higher in August, with 331 mm spread over 26 days, compared to April's 79 mm over just 16 days. For more details, you can explore Alajuela weather in April.
In comparing the weather of August and May, we see that both months feature similar temperature ranges, with minimums around 16°C and maximums reaching up to 28°C. However, May tends to have a slightly higher average temperature at 21°C compared to August's 20°C. Additionally, May experiences more precipitation, totaling 391 mm over 27 days, while August sees 331 mm over 26 days. The humidity is noticeably higher in August at 82%, compared to May's more comfortable 69%. For a detailed look at May's weather conditions, you can check this link: Alajuela weather in May.
In comparing the weather between June and August, we find that both months feature similar temperature ranges, with June having a slightly higher average temperature of 21°C (70°F) compared to August's 20°C (69°F). However, August tends to be slightly cooler overall, with maximum temperatures reaching 28°C (82°F) versus June's maximum of 27°C (81°F). Precipitation levels are quite comparable, with June experiencing 351 mm (13.8 in) over 27 days and August at 331 mm (13.0 in) over 26 days. Humidity is relatively high in both months, with August at 82% and June slightly higher at 84%. For a more detailed look at June's weather, you can visit Alajuela weather in June.
When comparing the weather in July and August, both months experience similar minimum temperatures, hovering around 16°C (60°F). However, August tends to be slightly warmer on average, reaching 20°C (69°F), compared to 21°C (69°F) in July. Notably, August is also significantly wetter, with total precipitation of 331 mm (13.0 in) over 26 days, versus July's 233 mm (9.2 in) during the same number of days. Humidity levels are slightly lower in August at 82%, while July records a higher humidity of 85%. For more details on July's weather, you can visit Alajuela weather in July.
In comparing the weather between August and September, both months present similar average temperatures, with August exhibiting slightly higher maximum temperatures at 28°C (82°F) compared to September's 27°C (80°F). While the minimum temperatures are quite close, with August having a low of 16°C (60°F) and September at 15°C (60°F), the key difference lies in precipitation and humidity. September sees increased rainfall, with 436 mm (17.2 in) compared to August's 331 mm (13.0 in), and experiences precipitation on 28 days, one more than in August. Humidity remains fairly consistent, with September at 81% and August at 82%. For more information on September's weather in Alajuela, you can visit Alajuela weather in September.
In comparing the weather between August and October, both months exhibit similar average temperatures, with August averaging 20°C (69°F) and October slightly lower at 20°C (68°F). However, October experiences significantly higher precipitation, totaling 570 mm (22.4 in) over 29 days, compared to August's 331 mm (13.0 in) spread over 26 days. Despite this increase in rainfall, humidity levels remain relatively close, with August at 82% and October at 80%. Overall, October tends to be wetter than August, making it essential to prepare for the more frequent rain showers. For those interested in the specifics, you can find more details at Alajuela weather in October.
August and November in Alajuela exhibit relatively mild temperatures, with August showing a slightly higher maximum of 28°C (82°F) compared to November’s peak of 26°C (79°F). Both months have an average temperature of around 20°C (68°F to 69°F), making them comfortable. However, August is markedly wetter, with 331 mm (13.0 in) of precipitation over 26 days, while November receives only 209 mm (8.2 in) across 19 days. The humidity levels are quite comparable, hovering around 82% in August and 80% in November, contributing to the overall tropical feel. For more details on November weather specific to Alajuela, you can visit Alajuela weather in November.
The weather in August is generally warmer and more humid compared to December. In August, temperatures range from a minimum of 16°C (60°F) to a maximum of 28°C (82°F), with an average of 20°C (69°F). This month experiences significant rainfall, with 331 mm (13.0 in) of precipitation over 26 days, contributing to a high humidity level of 82%. In contrast, December sees slightly cooler temperatures, with a minimum of 15°C (58°F) and a maximum of 26°C (80°F), while maintaining an average of 20°C (68°F). Additionally, December has much less rainfall, totaling only 63 mm (2.5 in) over 11 days, and a lower humidity level of 72%. For more detailed insights, you can explore Alajuela weather in December.
In August, Alajuela experiences a noticeable increase in humidity and rainfall compared to other months, creating a lush, vibrant environment. With frequent showers and overcast skies, this month is characterized by a palpable tropical atmosphere, unlike the drier conditions seen earlier in the year. The temperatures remain moderate, offering a comfortable average that makes it perfect for exploring the region's natural beauty. However, it's essential to prepare for the frequent downpours, as precipitation can significantly impact outdoor activities. For a more in-depth understanding of what to expect throughout the year, visit Alajuela Climate.