Last updated: August 21, 2025
April in San Jose, Costa Rica, offers a delightful blend of warmth and occasional rain, making it a captivating time to visit. With maximum temperatures reaching 26°C (80°F) and an average of 19°C (66°F), the climate is pleasantly mild. However, visitors should be prepared for some rainy days, as April sees about 113 mm (4.4 in) of precipitation over 23 days. Humidity hovers around 67%, adding a touch of tropical ambiance to the vibrant city. Overall, April provides a refreshing experience, where the lush scenery thrives under the gentle rain, perfect for exploring San Jose's rich culture and beauty.
April in San Jose, Costa Rica, marks a subtle transition in temperature as the dry season begins to wane. With minimum temperatures rising to 13°C (56°F) and maximums reaching 26°C (80°F), visitors can expect pleasantly warm days and cooler, refreshing evenings. The average temperature hovers around 19°C (66°F), creating an inviting climate for outdoor adventures. This month sees the city basking in a mix of sunshine and the first hints of upcoming rainy season, making April an excellent time to enjoy both vibrant city life and the beautiful surrounding nature. As temperatures steadily inch upward from the previous months, the pleasant warmth lays the groundwork for the lush greenery that will soon flourish.
April marks a significant shift in precipitation for San Jose, Costa Rica, as the monthly rainfall increases sharply to 113 mm (4.4 in), the highest amount so far this year. This uptick is reflected in the 23 rainy days, indicating a transition into the wetter season. The trend shows a clear escalation in moisture, with May following April with an astonishing 425 mm (16.7 in), suggesting that the lush, green landscape typical of the region is just beginning to come alive. The pattern of increased rainfall is crucial for the local ecosystem, supporting agriculture and replenishing water resources ahead of the notably intense months of May through October. As the city welcomes this refreshing rain, residents can also anticipate the vibrant blooms and bountiful harvests that come with the generous April showers.
In April, San Jose, Costa Rica, experiences a moderate humidity level of 67%, slightly lower than the preceding months of January (68%) and February (68%), but close to March's 66%. This marks the transition into the wetter season, as humidity levels steadily rise leading into the onset of summer, with May recording a slight increase to 69%. The shift becomes more pronounced in the following months, peaking dramatically in June at 84%. Overall, April showcases a brief interlude of refreshing comfort before the lush, vibrantly humid conditions that characterize the Costa Rican climate throughout the summer months.
April in San Jose, Costa Rica, sees the UV Index reach a striking 16, maintaining its position in the extreme exposure category, with a brisk burn time of just 10 minutes. This reflects a steady upward trend from January through April, where the index has gradually risen from 12 to its peak this month. Following April, the UV Index is expected to remain high, but it dips slightly to 14 in May and stays there through July. As the sun shines consistently bright, visitors and residents alike should remain vigilant, ensuring proper sun protection during this peak season. For more details on the UV Index in San Jose, visit San Jose UV Index.
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April in San Jose, Costa Rica, offers a delightful 303 hours of sunshine, embracing the vibrant energy of the dry season. Following a remarkable rise in sunlight from January's 246 hours to a peak in March with 329 hours, April maintains a robust luminosity, though it experiences a slight decline as May ushers in the rainy season with only 248 hours. This trend highlights the region's transitional phase, where the lingering warmth of dry days gradually gives way to the lush, refreshing rains of late spring. Over the course of the year, sunshine hours fluctuate but consistently provide a radiant backdrop, making San Jose a sun-soaked destination that charms visitors month after month.
As April rolls into San Jose, Costa Rica, the likelihood of sunny weather takes a noticeable dip, with only a 16% chance of sunshine. This marks a significant decline from the sunnier months earlier in the year, such as January, which enjoys a 47% chance of clear skies. The transition to April signals the onset of the rainy season, creating a contrast with the more vibrant sun-filled days of February and March, which both boast probabilities of 42% and 40%, respectively. As the region heads towards May with its even 12% chance of sun, this trend emphasizes the importance of planning for rain during the latter part of the dry season.
In April, San Jose, Costa Rica, basks in 12 hours of daylight, continuing the trend established in March and extending through the following months of May and June. This extended daylight period offers a vibrant atmosphere as the country transitions fully into its lush, green rainy season. From January to February, daylight starts at a consistent 11 hours, gradually increasing to 12 hours by March, marking a shift that paves the way for longer evenings filled with the sounds of the tropics. As the month of April embarks on this trend, it not only enhances outdoor activities but also enriches the local culture, inviting both locals and visitors to enjoy the beautiful landscapes longer under the warm Costa Rican sun.
As April unfolds in San Jose, Costa Rica, the gentle caress of the wind is evident, with average wind speeds settling at 1.7 m/s (4 mph). This marks a slight decrease from March, when breezes picked up to 2.3 m/s (5 mph), but it still maintains a consistent flow reminiscent of the transitional phase before the onset of the rainy season. Interestingly, the trend indicates a gradual decline in wind speed as the months progress towards June, which typically features the calmest air. Despite this softening, the winds of April offer a refreshing reprieve, reminding residents and visitors alike of the serene beauty that characterizes the Central Valley during this time of year.
Weather in San Jose varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in San Jose, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between April and January, both months showcase mild temperatures, but with some notable differences. April tends to be warmer with an average temperature of 19°C (66°F) and highs reaching up to 26°C (80°F), while January's average temperature is slightly cooler at 17°C (63°F) with a maximum of 24°C (76°F). Precipitation levels are higher in April, totaling 113 mm (4.4 in) over 23 days, compared to January's 93 mm (3.7 in) over just 11 days. Humidity remains relatively consistent, with January at 68% and April at 67%. Overall, April is warmer and wetter, while January offers a slightly drier and cooler climate. For more specific details about January weather, visit San Jose weather in January.
The weather in April tends to be warmer and wetter compared to February. In April, the average temperature rises to 19°C (66°F), with a maximum of 26°C (80°F) and a minimum of 13°C (56°F), while February has a slightly cooler average of 17°C (64°F) with a maximum of 25°C (78°F) and a minimum of 11°C (52°F). Additionally, April experiences significantly more rainfall, with 113 mm (4.4 in) over 23 days, compared to February's 43 mm (1.7 in) over 12 days. Humidity levels remain fairly similar, with February at 68% and April at 67%. For a more detailed look, you can explore the San Jose weather in February.
April experiences slightly warmer temperatures compared to March, with a minimum of 13°C (56°F) and a maximum of 26°C (80°F), while March has a minimum of 11°C (53°F) and a maximum of 25°C (76°F). The average temperature in April also rises to 19°C (66°F), slightly higher than March's average of 18°C (64°F). However, April is markedly wetter, receiving 113 mm (4.4 in) of precipitation over 23 days, in contrast to March's 49 mm (1.9 in) over 14 days. Humidity levels are fairly similar, with April at 67% and March at 66%. For more details on March's weather, you can visit San Jose weather in March.
April and May weather in the region shows distinct differences, particularly in terms of precipitation. April features a milder range of temperatures, with a minimum of 13°C (56°F) and a max of 26°C (80°F), alongside a total precipitation of 113 mm (4.4 in) over 23 days. In contrast, May sees a slight increase in minimum temperature to 14°C (58°F), while maintaining a similar maximum temperature of 26°C (79°F) and a higher average of 19°C (67°F). However, May is notably wetter, with total precipitation skyrocketing to 425 mm (16.7 in) spread over 29 days, leading to a slight rise in humidity to 69%. For more detailed information, you can check out San Jose weather in May.
April and June exhibit some notable differences in weather patterns. While both months share a similar average temperature of around 19°C (66°F), April experiences slightly lower minimum and maximum temperatures, ranging from 13°C (56°F) to 26°C (80°F). In contrast, June sees a marginally higher minimum temperature of 15°C (59°F) and a maximum of 26°C (78°F). However, June is significantly wetter, with a precipitation total of 341 mm (13.4 in) over 28 rainy days, compared to April’s 113 mm (4.4 in) over 23 days. The humidity also increases in June to 84%, up from 67% in April. For more information on the weather specifics, check out San Jose weather in June.
In comparing April and July, we see notable differences in both temperature and precipitation. April features a mild temperature range with a minimum of 13°C (56°F) and a maximum of 26°C (80°F), while July has slightly warmer tendencies with a minimum of 15°C (59°F) and a maximum of 25°C (77°F). However, July experiences significantly higher precipitation, accumulating 266 mm (10.5 in) over 28 days, compared to April's 113 mm (4.4 in) over 23 days. Additionally, humidity rises in July to 85%, compared to April's 67%, making July feel more humid overall. For more detailed information, you can check out San Jose weather in July.
April and August present distinct contrasts in weather patterns. In April, temperatures range from a minimum of 13°C (56°F) to a maximum of 26°C (80°F), with an average of 19°C (66°F). The month experiences moderate precipitation of 113 mm (4.4 in) over 23 days, resulting in a humidity level of 67%. In contrast, August sees slightly warmer temperatures, with a minimum of 15°C (59°F) and similar maximums (26°C or 79°F), maintaining the average at 19°C (66°F). However, August is significantly wetter, with 304 mm (12.0 in) of rainfall across 28 days, and a higher humidity level of 82%. For more details on the August weather, you can visit San Jose weather in August.
April and September share similar average temperatures, both hovering around 19°C (66°F), but their weather patterns diverge significantly. In April, the temperatures range from a minimum of 13°C (56°F) to a maximum of 26°C (80°F), with a lighter rainfall of 113 mm (4.4 in) spread over 23 days. In contrast, September tends to be wetter, with a total precipitation of 379 mm (14.9 in) over 29 days and increased humidity at 81%. This results in a more damp and overcast atmosphere compared to April's milder conditions. For a more detailed overview of September weather, check this link: San Jose weather in September.
In comparing the weather of April and October, both months boast similar average temperatures around 19°C (66°F), but they present notable differences in precipitation and humidity. April features a more moderate climate with maximum temperatures reaching 26°C (80°F) and significantly lower rainfall at 113 mm (4.4 in) over 23 days, resulting in a humidity level of 67%. In contrast, October experiences slightly cooler maximum temperatures of 25°C (78°F), but it is much wetter, with 517 mm (20.4 in) of rain occurring over 29 days, leading to a higher humidity of 80%. This stark difference in rainfall and humidity highlights the transition to the wet season in October, making it one of the rainiest months in the region. For a detailed look at what to expect, you can check out San Jose weather in October.
When comparing the weather in April and November, we see some notable differences and similarities. April experiences slightly warmer temperatures, with a minimum of 13°C (56°F) and an average high of 26°C (80°F), while November's temperatures are marginally cooler with a minimum of 14°C (57°F) and a maximum of 24°C (75°F). Both months feature a fair amount of precipitation, but November is significantly wetter, receiving 260 mm (10.3 in) of rain over 24 days compared to April's 113 mm (4.4 in) over 23 days. Additionally, November tends to be more humid, with a humidity level of 80% compared to April’s 67%. For more detailed weather insights specific to November, you can refer to San Jose weather in November.
April and December present a contrast in weather patterns. In April, the temperatures range from a minimum of 13°C (56°F) to a maximum of 26°C (80°F), with an average of 19°C (66°F). The month sees significant rainfall, totaling 113 mm (4.4 in) over 23 days, accompanied by a humidity level of 67%. In comparison, December has slightly cooler temperatures, ranging from a minimum of 12°C (55°F) to a maximum of 24°C (75°F), with an average of 18°C (64°F). This month experiences even more precipitation, totaling 156 mm (6.1 in) over 16 days, and a slightly higher humidity of 72%. For more details on December weather, visit San Jose weather in December.
As April unfolds in San Jose, it brings a unique transition from the cooler, drier months to a more humid and rainier pattern. With temperatures averaging around 19°C (66°F) and maximum highs reaching 26°C (80°F), the weather is pleasantly warm but accompanied by increased humidity levels of 67%. While April is known for its vibrant greenery due to frequent showers—with precipitation occurring on nearly 23 days—it contrasts starkly with the drier and brighter months that precede it. This combination of warmth and rain sets the stage for a lush and lively atmosphere, making it a distinct time of year for locals and visitors alike. For a deeper dive into the seasons and their nuances, check out San Jose Climate.