Last updated: August 21, 2025
April in Alajuela, Costa Rica is marked by a pleasant blend of warm temperatures and frequent showers. With maximum temperatures reaching 29°C (85°F) and an average of 21°C (70°F), the days are comfortably warm, while evenings cool down to a refreshing 15°C (58°F). This month typically sees 79 mm (3.1 in) of rainfall across 16 days, contributing to a relative humidity of 67%. Visitors can expect a vibrant landscape nourished by the rains, making it an ideal time for exploring the lush natural beauty that defines this region. Enjoy a mix of sunny spells and gentle showers, perfect for embracing the tropical charm of Alajuela.
In April, Alajuela, Costa Rica, experiences a delightful shift in temperatures, marking the onset of warmer days as the dry season comes to a close. With minimums rising to 15°C (58°F) and maximums reaching up to 29°C (85°F), the average temperature holds steady at 21°C (70°F), reflecting a pleasing warmth that encourages outdoor activities. This month witnesses a gradual increase in temperatures compared to the preceding months, with both the daily lows and highs edging slightly upward. As the transition to the wetter season approaches, April offers visitors a taste of the vibrant, sunny weather that characterizes this beautiful region, making it an ideal time for exploration and enjoyment in the lush landscapes of Costa Rica.
April marks a significant transition in Alajuela, Costa Rica, as the region experiences a notable uptick in precipitation, registering 79 mm (3.1 in) over the month. This increase is emblematic of the shift towards the rainy season, with rainfall occurring on 16 days, setting the stage for even heavier downpours in the following months. While January through March see relatively dry conditions, with total rainfall well below April's levels, the downturn in precipitation days leads into an intensifying wet season. As the landscape begins to transform with lush greenery and vibrant blooms, April acts as a precursor to the deluges of May and beyond, where totals soar to over 391 mm (15.4 in), highlighting Costa Rica's dynamic climate rhythm.
In April, Alajuela, Costa Rica, experiences a moderate humidity level of 67%, slightly refining the trend observed in the preceding months. Following a gradual decrease from 68% in January and February to 66% in March, April's humidity marks a minimal uptick, hinting at the approach of the wetter months ahead. As the landscape transitions into the rainy season starting in May, where humidity rises to 69%, it becomes evident that the region's climate is shifting towards higher moisture levels. This pattern sets the stage for the soaring humidity typical of June and July, when levels peak at an impressive 84% and 85%, creating a lush and vibrant environment that characterizes the heart of Central America's tropical climate.
In April, Alajuela, Costa Rica, continues to experience intense sun exposure with a UV Index holding steady at 15, categorized as extreme. This trend of high UV levels, consistent since March, signals that visitors and residents alike should take precautions to protect their skin, with a burn time of just 10 minutes. As the month unfolds, the pattern of extreme UV exposure dances in tandem with the preceding months, underscoring the importance of sun safety during this time of year. For more insights into UV levels throughout the year, check out the Alajuela UV Index.
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April in Alajuela, Costa Rica, boasts a delightful 300 hours of sunshine, creating an ideal backdrop for outdoor adventures and exploration. Following the upward trend from January to March, where sunshine hours reached a peak of 329 hours, April maintains robust sunlight levels, signaling the region's transitional phase into the lush green months ahead. However, as the year progresses into May and June, there's a noticeable dip, with sunshine hours falling to 235 and 226 hours, respectively. Despite this slight reduction, April’s warmth serves as a reminder of the vibrant energy that defines this Central American gem, making it a perfect time to bask in the natural beauty that surrounds the city.
April marks a notable dip in sunny weather in Alajuela, Costa Rica, with only a 20% chance of sunshine. This represents a significant decrease compared to the earlier months of the year, such as January's 52% and even February's 48%. Following the sunniest months, April transitions into the rainy season, which sees a further decline as May brings just a 14% likelihood of sunny days. As the year progresses, the trend continues downward through the mid-year months, with August being particularly cloudy at a mere 6% chance of sunshine. Travelers considering a trip during this time should be prepared for overcast skies and potential rainfall, as April paves the way for the wetter months ahead.
In Alajuela, Costa Rica, the daylight duration experiences a subtle yet noticeable rhythm throughout the year. As we transition into April, the sunshine graces the region for 12 hours, continuing the trend established in March and seamlessly carried into May. This period of extended daylight reflects a steady increase that peaks in the early months of the year, showcasing a generous 12 hours from March through July before gradually waning. Notably, the return to 11 hours in October hints at the impending approach of the dry season, revealing a harmonious cycle that characterizes the enchanting light of Costa Rican days.
In April, Alajuela experiences a gentle transition in its wind patterns, with an average speed of 1.7 m/s (4 mph). This marks a noticeable decline from the breezier months of January through March, where winds fluctuated between 2.2 m/s and 2.4 m/s (5 mph). As the region shifts towards the hotter months leading into the rainy season, the winds calm further in May, dropping to 1.5 m/s (3 mph). This trend highlights April as a serene interlude, offering a brief respite from the stronger gusts that characterize the early part of the year. Embracing this softer breeze invites a tranquil atmosphere, perfect for enjoying the lush landscape and vibrant life of Alajuela.
Weather in Alajuela varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Alajuela, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in April and January, April tends to be warmer and wetter. In April, temperatures range from a minimum of 15°C (58°F) to a maximum of 29°C (85°F), with an average temperature of 21°C (70°F). The month also experiences a significant amount of rainfall, totaling 79 mm (3.1 in) over 16 days, which contributes to its higher humidity level of 67%. In contrast, January has slightly cooler temperatures ranging from a minimum of 13°C (56°F) to a maximum of 27°C (82°F), with a similar average of 20°C (68°F). Additionally, January sees much less precipitation, with only 32 mm (1.3 in) over just 6 days, and a humidity level of 68%. For more details, you can check Alajuela weather in January.
When comparing the weather in April and February, we see a slight increase in temperature in April, with minimums of 15°C (58°F) compared to February's 13°C (56°F). The average high in April reaches 29°C (85°F), marginally warmer than February's 28°C (83°F). However, April is considerably wetter, experiencing 79 mm (3.1 in) of precipitation over 16 days, while February enjoys a more arid climate with just 13 mm (0.5 in) over only 3 days. Humidity levels remain relatively similar, with April at 67% and February at 68%. For more details, you can check Alajuela weather in February.
April's weather shows a slight increase in temperatures compared to March, with average temperatures remaining consistent at 21°C (70°F), but the maximum temperature in April reaches 29°C (85°F) versus March's 28°C (83°F). Precipitation levels also significantly differ; April experiences 79 mm (3.1 in) of rain over 16 days, while March sees only 15 mm (0.6 in) over just 4 days. Additionally, humidity is slightly higher in April at 67%, compared to March's 66%. For more detailed information on March weather, you can visit Alajuela weather in March.
April and May in Alajuela showcase subtle changes in weather patterns. While April presents a comfortable average temperature of 21°C (70°F) with a minimum of 15°C (58°F) and maximum of 29°C (85°F), May maintains the same average but begins with a slightly higher minimum temperature of 16°C (61°F) and a slightly lower maximum of 28°C (83°F). However, May is significantly wetter, experiencing 391 mm (15.4 in) of precipitation over 27 days, compared to April's 79 mm (3.1 in) over 16 days. The humidity also sees a slight increase, reaching 69% in May from April's 67%. For more details on this month's weather, check out Alajuela weather in May.
April and June in Alajuela offer distinct weather experiences. In April, temperatures range from a minimum of 15°C (58°F) to a maximum of 29°C (85°F), with an average temperature of 21°C (70°F). The month sees moderate precipitation of 79 mm (3.1 in) over 16 days, accompanied by a humidity level of 67%. In contrast, June is slightly cooler, with temperatures varying from a minimum of 16°C (60°F) to a maximum of 27°C (81°F), while maintaining the same average temperature of 21°C (70°F). However, June is significantly wetter, boasting 351 mm (13.8 in) of rainfall over 27 days and a higher humidity level of 84%. For a more detailed look at what to expect, you can visit Alajuela weather in June.
April and July exhibit distinct weather patterns, showcasing a transition into the heart of the rainy season. In April, temperatures range from a minimum of 15°C (58°F) to a maximum of 29°C (85°F), with an average of 21°C (70°F) and a moderate humidity level of 67%. This month sees 79 mm (3.1 in) of precipitation across 16 days, making it relatively dry compared to the subsequent month. In contrast, July features slightly warmer minimum temperatures at 16°C (61°F) and a similar average of 21°C (69°F), but the maximum is lower at 27°C (81°F). However, July is marked by significantly higher rainfall, with 233 mm (9.2 in) falling over 26 days and a notable increase in humidity to 85%. This stark difference highlights July as a much wetter and more humid month. For further details, you can check Alajuela weather in July.
April and August present distinct weather patterns, showcasing a transition from the early warmth of spring to the height of summer. In April, temperatures range from a minimum of 15°C (58°F) to a comfortable maximum of 29°C (85°F), with an average of 21°C (70°F). The month experiences moderate rainfall, totaling 79 mm (3.1 in) over 16 days, accompanied by a humidity level of 67%. In contrast, August shows slightly cooler temperatures, with a minimum of 16°C (60°F) and a maximum of 28°C (82°F), and an average of 20°C (69°F). However, it is significantly wetter, with precipitation reaching 331 mm (13.0 in) on 26 days, and humidity rising to 82%. For more detailed insights, you can check Alajuela weather in August.
April and September exhibit notable differences in weather patterns. In April, temperatures range from a minimum of 15°C (58°F) to a maximum of 29°C (85°F), with an average of 21°C (70°F) and relatively moderate humidity at 67%. It sees about 79 mm (3.1 in) of precipitation over 16 days, indicating a drier month. In contrast, September experiences cooler temperatures, with highs reaching 27°C (80°F) and an average of 20°C (69°F). However, it is significantly wetter, accumulating 436 mm (17.2 in) of rainfall over 28 days and higher humidity levels of 81%. For a detailed look at September's conditions, you can check Alajuela weather in September.
In comparing the weather of April and October, both months feature similar minimum temperatures around 15°C (58°F), but April tends to be warmer on average with a temperature of 21°C (70°F) compared to October's 20°C (68°F). Maximum temperatures are also slightly higher in April, reaching 29°C (85°F), while October peaks at 27°C (80°F). However, October experiences significantly more precipitation, averaging 570 mm (22.4 in) over 29 days, compared to April's 79 mm (3.1 in) across 16 wet days. The humidity is higher in October at 80%, compared to April's 67%, creating a more humid atmosphere. For a deeper dive into October weather patterns, you can refer to Alajuela weather in October.
April and November exhibit similar minimum temperatures, both starting at around 15°C (58°F), but April enjoys slightly warmer average and maximum temperatures, reaching up to 29°C (85°F). In contrast, November experiences a cooler average of 20°C (68°F) and a maximum of 26°C (79°F). Precipitation in November is notably higher, with 209 mm (8.2 in) falling over 19 days compared to April’s 79 mm (3.1 in) across 16 days. Additionally, November’s humidity is higher at 80%, compared to April’s 67%, contributing to a more muggy atmosphere. For more details, you can check out Alajuela weather in November.
In April, temperatures in Alajuela can range from a minimum of 15°C (58°F) to a maximum of 29°C (85°F), with an average of 21°C (70°F). This month tends to be wetter, with a total precipitation of 79 mm (3.1 in) spread over 16 days, contributing to a humidity level of 67%. In contrast, December sees slightly cooler temperatures, with a minimum of 15°C (58°F), an average of 20°C (68°F), and a maximum of 26°C (80°F). Precipitation is lower in December at 63 mm (2.5 in), occurring over 11 days, and the humidity rises to 72%. For more details on December weather in Alajuela, check out Alajuela weather in December.
April in Alajuela brings a refreshing shift in weather, characterized by a pleasant combination of warm temperatures and increased humidity. With daytime highs reaching up to 29°C (85°F), the warmth is complemented by evening coolness, averaging around 21°C (70°F). Rainfall becomes more prevalent this month, with about 16 days of precipitation contributing to a total of 79 mm (3.1 in). This transitional period before the dry season is marked by lush greenery and vibrant landscapes, making it a unique time to experience the beauty of Alajuela. For more insights on the local climate variations, visit Alajuela Climate.