Last updated: August 21, 2025
March in San Jose, Costa Rica offers a delightful blend of warm temperatures and refreshing rains. With a maximum high of 25°C (76°F) and an average around 18°C (64°F), the weather is pleasantly mild, making it ideal for outdoor explorations. However, visitors should be prepared for potential showers, as the month sees about 49 mm (1.9 in) of precipitation spread over 14 days. The humidity hovers around 66%, adding a tropical touch to the atmosphere. Whether you're wandering through vibrant markets or relaxing in lush parks, March is a charming time to experience the cultural richness of this bustling city.
In March, San Jose, Costa Rica, experiences a delightful transition into warmer weather, with temperatures typically ranging from a minimum of 11°C (53°F) to a maximum of 25°C (76°F). The average temperature nudges slightly upward to 18°C (64°F), marking a subtle shift that heralds the approach of spring. This month mirrors February's warmth while hinting at April's anticipated rise, as both minimum and maximum temperatures remain stable. As the month progresses, the vibrant atmosphere of the city becomes even more inviting, making it an ideal time for outdoor adventures amid the lush landscapes that Costa Rica is renowned for.
March marks a subtle transition in San Jose's precipitation pattern, receiving 49 mm (1.9 in) of rain over 14 days. While it sees a slight increase from February's 43 mm, the rainfall is still modest compared to the heavy downpours that follow in April and May, where precipitation skyrockets to 113 mm (4.4 in) and an astounding 425 mm (16.7 in), respectively. This gradual uptick in March suggests the onset of the rainy season, hinting that locals should prepare for more frequent showers as the month progresses. With each passing week, the lush green landscape grows more vibrant, setting the stage for the tropical splendor that defines Costa Rica's stunning wet season.
In March, humidity in San Jose, Costa Rica, settles at a comfortable 66%, marking a slight dip from the 68% observed in the preceding months of January and February. This trend of gradually decreasing humidity continues into April, where it slightly rebounds to 67%, before climbing steadily into the more tropical conditions of the rainy season beginning in May, when humidity reaches 69%. The onset of June brings a sharp increase, with humidity soaring to 84%, and peaking in the subsequent months of July and August. Overall, March serves as a transitional period, where the air remains refreshingly pleasant, hinting at the approaching moisture-laden months.
In March, San Jose, Costa Rica, experiences a UV Index of 15, classifying it as extreme exposure, with a quick burn time of just 10 minutes. This marks a peak in the UV intensity, as it follows a gradual rise from January's index of 12, gaining strength in February with an index of 14. The trend continues to escalate with April expected to reach an even higher index of 16. Such high UV levels emphasize the importance of sun protection during this month, ensuring that residents and visitors alike remain vigilant against overexposure. For detailed readings and more, check out San Jose UV Index.
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March shines as a standout month in San Jose, Costa Rica, boasting an impressive 329 hours of sunshine. This marks a delightful increase from January's 246 hours and February's 297 hours, setting the stage for warmer days and vibrant outdoor activities. Following March, sunlight begins to taper slightly in April with 303 hours, but the overall trend showcases the city's consistently bright climate. As the months progress into the seasonally variable May and June, sunshine levels dip to 248 and 244 hours respectively. This fluctuating pattern underscores the charm of San Jose, where March’s brilliance serves as a joyful prelude to the lush greenery brought about by the rainy season.
As March approaches in San Jose, Costa Rica, the likelihood of sunny weather declines, with a 40% chance of sunshine gracing the skies. This follows a trend of decreasing sunlight that begins in February and continues into the rainy season. Historically, March sits in a transitional phase, where the vibrant sun of January, at 47%, and February, at 42%, gives way to the cloudier months ahead, notably April, which plummets to a mere 16% chance of sunshine. As visitors and locals alike prepare for the shifts in weather, March serves as a gentle reminder of the impending rainy season, while still offering a taste of the sunny days that precede it.
In March, San Jose, Costa Rica, welcomes an increase in daylight duration, basking in a full 12 hours of natural light each day. This marks a noticeable shift from the consistent 11 hours found in the earlier months of the year, such as January and February. As spring approaches, daylight remains steady at 12 hours through April and May, creating an inviting atmosphere for outdoor activities. This trend of extended daylight continues through the mid-year months, indicating a delightful rhythm to the region's seasonal changes. However, as the year progresses towards October, daylight gradually declines back to 11 hours, signaling the onset of the cooler months. The subtle ebb and flow of daylight in San Jose not only enhances the local climate but also enriches the community's vibrant lifestyle.
In March, San Jose, Costa Rica, enjoys a gentle average wind speed of 2.3 m/s (5 mph), which reflects a slight decrease from February's 2.1 m/s yet remains steady compared to January. As the dry season progresses, the breezes provide a refreshing touch amidst the warmth, making outdoor activities particularly enjoyable. This month stands out as the last notable wind boost before April's winds diminish to just 1.7 m/s (4 mph), hinting at the tranquil atmosphere that typically follows. Such consistent, mild winds create a serene backdrop perfect for exploration or relaxation, perfectly encapsulating the charm of Costa Rica in early spring.
Weather in San Jose varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in San Jose, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between January and March, both months feature relatively mild temperatures, with January having a slightly lower average temperature of 17°C (63°F) compared to March’s 18°C (64°F). The minimum temperatures are the same at 11°C (53°F), while maximum temperatures are comparable, reaching 24°C (76°F) in both months. However, January experiences significantly more precipitation at 93 mm (3.7 in) over 11 days, compared to March's 49 mm (1.9 in) across 14 days. Additionally, humidity levels are slightly higher in January at 68%, compared to March's 66%. For more detailed information about January weather specifically, you can refer to San Jose weather in January.
When comparing the weather in March and February, we see that both months share similar temperature ranges, with March having a min of 11°C (53°F), an average of 18°C (64°F), and a max of 25°C (76°F), while February mirrors this with a min of 11°C (52°F), an average of 17°C (64°F), and a max of 25°C (78°F). Precipitation increases slightly in March, totaling 49 mm (1.9 in) over 14 days, compared to February's 43 mm (1.7 in) across 12 days. Additionally, March tends to be slightly more humid, with an average humidity of 66% compared to February's 68%. For a more detailed breakdown of February weather, you can check San Jose weather in February.
March and April exhibit a gentle transition in weather patterns. March boasts milder temperatures with a minimum of 11°C (53°F) and an average of 18°C (64°F), peaking at 25°C (76°F). In contrast, April sees slightly higher temperatures, starting at 13°C (56°F) and reaching an average of 19°C (66°F) with a maximum of 26°C (80°F). However, April is also characterized by increased precipitation, with 113 mm (4.4 in) of rain over 23 days compared to March's 49 mm (1.9 in) over 14 days. Both months feature similar humidity levels, with March at 66% and April at 67%. For more specific details about conditions in April, visit San Jose weather in April.
When comparing the weather of March and May, notable differences emerge in both temperature and precipitation patterns. In March, temperatures range from a minimum of 11°C (53°F) to a maximum of 25°C (76°F), with an average of 18°C (64°F) and only 49 mm (1.9 in) of precipitation spread across 14 days, resulting in a humidity level of 66%. Conversely, May experiences slightly warmer temperatures, with a minimum of 14°C (58°F), an average of 19°C (67°F), and a maximum of 26°C (79°F). However, it sees a significant increase in precipitation, totaling 425 mm (16.7 in) over 29 days, leading to a humidity level of 69%. For a detailed look at what to expect, check out San Jose weather in May.
March and June exhibit notable differences in weather patterns. In March, temperatures range from a minimum of 11°C (53°F) to a maximum of 25°C (76°F), with an average temperature of 18°C (64°F). The month sees a moderate precipitation level of 49 mm (1.9 in) spread over 14 days and a humidity level of 66%. In contrast, June's weather is characterized by slightly warmer temperatures, with a minimum of 15°C (59°F) and a maximum of 26°C (78°F), averaging 19°C (67°F). However, June experiences significantly higher rainfall, totaling 341 mm (13.4 in) over 28 days, accompanied by increased humidity at 84%. For more detailed information, visit San Jose weather in June.
In March, temperatures in San Jose range from a minimum of 11°C (53°F) to a maximum of 25°C (76°F), with an average temperature of 18°C (64°F). The month experiences relatively moderate precipitation of 49 mm (1.9 in) over about 14 days, and the humidity averages around 66%. In contrast, July sees slightly warmer temperatures, with a minimum of 15°C (59°F) and similar maximum temperatures up to 25°C (77°F), but the average temperature remains close at 19°C (66°F). July is significantly wetter, with precipitation soaring to 266 mm (10.5 in) across approximately 28 days, resulting in a higher humidity level of 85%. For more detailed insights on the weather, you can refer to San Jose weather in July.
March and August in San Jose present notable differences in weather patterns. In March, temperatures range from a minimum of 11°C (53°F) to a maximum of 25°C (76°F), with an average of 18°C (64°F) and relatively low precipitation of 49 mm (1.9 in) across about 14 days. The humidity levels stand at 66%, creating a comfortable, though occasionally damp, environment. In contrast, August experiences a warmer range of temperatures, with a minimum of 15°C (59°F) and a maximum of 26°C (79°F), averaging 19°C (66°F). However, this month sees significantly increased rainfall of 304 mm (12.0 in) spread over 28 days, contributing to the notable rise in humidity to 82%. For more detailed information, you can check San Jose weather in August.
The weather in March presents a mild climate with temperatures ranging from a minimum of 11°C (53°F) to a maximum of 25°C (76°F). This month experiences an average temperature of 18°C (64°F) and relatively low precipitation of 49 mm (1.9 in) over 14 days, accompanied by a humidity level of 66%. In contrast, September sees slightly higher minimum and average temperatures of 14°C (58°F) and 19°C (66°F), respectively, while still reaching up to 25°C (78°F). However, September is markedly wetter, with a significant increase in precipitation to 379 mm (14.9 in) across 29 days and greater humidity at 81%. For more detailed insights, you can check out San Jose weather in September.
In comparing the weather of March and October, March typically enjoys milder temperatures, with a minimum of 11°C (53°F) and an average of 18°C (64°F), while October tends to be slightly warmer, starting at a minimum of 14°C (58°F) and averaging 19°C (66°F). Both months can reach a maximum of 25°C (76°F in March and 78°F in October), but October brings a significant increase in precipitation, averaging 517 mm (20.4 in) over 29 rainy days compared to March's 49 mm (1.9 in) across 14 days. Additionally, October is marked by higher humidity at 80%, compared to March's 66%. For more details on the conditions in October, you can check San Jose weather in October.
When comparing the weather in March and November, notable differences emerge. March typically enjoys milder temperatures, with a minimum of 11°C and a maximum of 25°C, averaging around 18°C. Precipitation is relatively low at 49 mm over approximately 14 days, and humidity levels hover around 66%. In contrast, November experiences slightly higher temperatures, with a minimum of 14°C and a maximum of 24°C, while still averaging 18°C. However, it sees significantly more rainfall, with 260 mm spread across 24 days, resulting in higher humidity at 80%. For more detailed information, you can check out San Jose weather in November.
In March, the weather in San Jose features mild temperatures with a minimum of 11°C (53°F), averaging around 18°C (64°F), and reaching a maximum of 25°C (76°F). The month experiences moderate precipitation, totaling 49 mm (1.9 in) over 14 days, with a humidity level of 66%. In contrast, December sees slightly warmer temperatures, with a minimum of 12°C (55°F), an average of 18°C (64°F), and a maximum of 24°C (75°F). However, this month is significantly wetter, accumulating 156 mm (6.1 in) of rain over 16 days and higher humidity at 72%. For more details on December weather, you can visit San Jose weather in December.
In March, San Jose experiences a delightful transition as temperatures gradually warm, offering a perfect blend of comfortable days and cooler nights. Unlike the preceding months, this period sees an increase in humidity and a notable amount of precipitation, with rain gracing approximately half the days of the month. The climate becomes a refreshing contrast to the drier season, making March a great time to enjoy the city's lush greenery and vibrant atmosphere. For a deeper dive into what to expect throughout the year, visit San Jose Climate.