Last updated: August 21, 2025
January in San Jose, Costa Rica is characterized by pleasantly mild temperatures, with an average of 24°C (75°F), peaking at a comfortable 27°C (82°F) and dipping to a refreshing 20°C (68°F). This month witnesses significant rainfall, averaging 148 mm (5.8 in) over 22 days, contributing to the lush, green landscape typical of the region. The overall humidity sits at around 66%, creating a tropical ambiance that visitors find both invigorating and enjoyable. Whether you're exploring the vibrant culture or the surrounding natural beauty, January offers a temperate climate that's perfect for adventure.
In January, San Jose, Costa Rica, enjoys a delightful tropical climate, characterized by mild temperatures that set a comfortable stage for outdoor adventures. The month starts with an average low of 20°C (68°F) and peaks at a maximum of 27°C (82°F), providing ideal conditions for exploring the city's vibrant culture and lush landscapes. As the month progresses, the temperature remains consistently pleasant, with averages hovering around 24°C (75°F). This pattern of stable warmth carries into February, where temperatures slightly rise, foreshadowing a gradual warming trend as the dry season takes hold. With January's refreshing climate, it's a perfect time for visitors to experience the natural beauty and rich biodiversity of this charming Central American city.
January in San Jose, Costa Rica, marks the transition into the wet season, recording an average precipitation of 148 mm (5.8 in) over 22 days. This amount sets the stage for the heavier rains that follow in the coming months, particularly in May and June, where totals can soar to 297 mm (11.7 in) and 337 mm (13.3 in), respectively. Interestingly, this month has more rain days than December, indicating the onset of a gradual increase in precipitation as the region gears up for the peak of the rainy season. As the year progresses, rainfall typically culminates in October, where it reaches a substantial 387 mm (15.2 in) across 28 days, highlighting the dramatic shift from January's milder rains to the torrential downpours later in the year.
In January, San Jose, Costa Rica experiences a comfortable humidity level of 66%, making it an inviting time for visitors. As the month flows into February, this figure dips slightly to 64%, and continues a gradual decline to 63% through March, April, and May. This trio of months provides a pleasant environment as humidity remains consistent. However, the climate begins to shift in June, with humidity levels rising to 74%, signaling the onset of the wetter season. By July, it peaks at a high 85%, maintaining elevated levels through August and September before slowly decreasing throughout the fall months. By November and December, humidity settles back to a more moderate 79% and 70%, respectively, marking a return to milder conditions as the year concludes. This distinct pattern illustrates how humidity strings together the different seasons, creating a tapestry of tropical weather in this vibrant city.
In January, the UV Index in San Jose, Costa Rica, reaches a striking 11, indicating an extreme exposure level and a quick burn time of just 10 minutes. This pattern continues throughout the early months of the year, with February peaking at 13, while March, April, May, and June maintain a level of 14, solidifying their status as some of the most intense months for UV radiation. Even during the latter half of the year, the index remains high, though slightly reduced in intensity with 13 in August through October, and then tapering off to 11 in November and 10 by December. With such consistently high levels, it’s crucial for residents and visitors alike to take precautions against sun exposure. For more detailed information, check out the comprehensive data at San Jose UV Index.
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In January, San Jose, Costa Rica basks in an inviting 258 hours of sunshine, setting the tone for a year of vibrant weather. As the months transition into February and March, the sunshine hours rise significantly, peaking at 332 hours in March, capturing the essence of springtime bliss. This trend shifts slightly in April with a slight decrease to 325 hours, yet the sun continues to shine generously. The following months display a pattern of consistency with hours fluctuating around 293 to 312, showcasing a reliable warmth that makes this Central American gem a year-round destination. Even as the year wraps up, the charm of San Jose persists with 318 hours of sunshine in December, inviting visitors to enjoy its golden rays right through to the end of the calendar year.
In January, San Jose, Costa Rica enjoys a 40% chance of sunny weather, setting a promising tone for the year ahead. This likelihood marks a slight dip from December's 42%, but it still hints at a favorable start to the dry season. As the months progress, the likelihood of sun peaks in February at 51%, before gradually declining through the spring and summer months, plummeting to a mere 9% in August. The trend clearly illustrates the seasonal shifts in the region, with January offering a refreshing balance of sunshine before the heavier rains set in later in the year.
In San Jose, Costa Rica, January greets residents with 11 hours of daylight, a trend that continues into February, offering a comfortable balance for outdoor activities and exploration. As the months progress into March, daylight extends to 12 hours, a duration that remains consistent through much of the rainy season, lasting until September. This stable daylight provides ample opportunity to enjoy the lush landscapes and vibrant culture. However, as October rolls in, the days begin to shorten again, returning to the 11-hour span seen at the start of the year. This rhythmic shift in daylight duration highlights the tropical climate's mildness, inviting both locals and visitors to embrace the beauty of San Jose throughout the year.
In January, San Jose, Costa Rica, experiences its breezy charm with an average wind speed of 5.6 m/s (12 mph), setting a refreshing tone for the year. As the month transitions into February, the winds slightly decline to 5.1 m/s (11 mph), continuing to provide a pleasant atmosphere. However, a notable uptick occurs in March, where the winds pick up again to 5.7 m/s (13 mph), invigorating the landscape. This invigorating trend gives way to a calmer April and May, each settling at 4.5 m/s (10 mph). As the dry season progresses into midday heat of June and July, winds dip further to 3.3 m/s (7 mph) and bounce back to 4.5 m/s (10 mph) respectively. The latter half of the year sees a gradual decline, culminating in October with gentler breezes at 2.6 m/s (6 mph). Yet, as the calendar turns, the winds pick up once more with November at 4.6 m/s (10 mph), and December wraps up the year with a refreshing 5.3 m/s (12 mph), hinting at nature's cycles and refreshing breezes in this vibrant locale.
Weather in San Jose varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in San Jose, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of January and February, both months feature relatively consistent temperatures, with January experiencing a minimum of 20°C (68°F), an average of 24°C (75°F), and a maximum of 27°C (82°F). February sees a slight increase in maximum temperature, reaching up to 28°C (83°F) while maintaining the same minimum and average temperatures. Precipitation levels also differ; January records 148 mm (5.8 in) over 22 days, whereas February fares better with only 96 mm (3.8 in) over 20 days. Additionally, humidity levels are slightly lower in February at 64% compared to January's 66%. For more detailed information about the weather in February, you can visit San Jose weather in February.
In comparing the weather between January and March, both months exhibit warm temperatures, with January having a minimum of 20°C (68°F) and an average of 24°C (75°F), while March shows slightly higher minimum temperatures at 21°C (69°F) and a similar average of 24°C (76°F). March also experiences a max temperature of 28°C (83°F), which is slightly higher than January's maximum of 27°C (82°F). Precipitation is higher in January with 148 mm (5.8 in) over 22 days compared to March's 102 mm (4.0 in) over 23 days. Humidity levels are similar, though slightly lower in March at 63% compared to 66% in January. For more detailed insights on March weather, refer to San Jose weather in March.
In January, the weather is typically warm, with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 27°C (82°F) and an average of 24°C (75°F). The month sees considerable rainfall, with a total precipitation of 148 mm (5.8 in) spread over 22 days, leading to a humidity level of 66%. In contrast, April offers even warmer conditions, with temperatures peaking at 30°C (87°F) and an average of 26°C (78°F), alongside a slightly higher minimum of 22°C (71°F). The precipitation drops significantly to 75 mm (2.9 in) over 19 days and a humidity level of 63%. For more detailed information, you can check this link: San Jose weather in April.
In January, the weather is characterized by milder temperatures, with a minimum of 20°C (68°F) and an average of 24°C (75°F), while May sees warmer conditions, with a minimum temperature of 22°C (73°F) and an average of 26°C (78°F). Rainfall also increases significantly in May, with 297 mm (11.7 in) over 28 days compared to January's 148 mm (5.8 in) over 22 days. Despite the higher humidity in January at 66%, May maintains a comfortable level at 63%. For a deeper look into the May climate, you can check out San Jose weather in May.
In January, the weather is generally warm with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 27°C (82°F), accompanied by an average of 24°C (75°F). The month experiences significant precipitation, totaling 148 mm (5.8 in) over 22 days, with a humidity level of 66%. In contrast, June features slightly warmer temperatures, with a minimum of 23°C (73°F), an average of 25°C (78°F), and a maximum of 29°C (85°F). However, it also brings increased rainfall, reaching 337 mm (13.3 in) over 30 days, and higher humidity at 74%. For more details on the weather in June, you can check this link: San Jose weather in June.
In January, the weather in San Jose features mild temperatures with a minimum of 20°C (68°F) and a maximum of 27°C (82°F), accompanied by average humidity levels of 66%. However, rainfall is frequent during this month, with 148 mm (5.8 in) of precipitation spread over 22 days. Conversely, July tends to be slightly warmer, with temperatures ranging from a minimum of 22°C (73°F) to a maximum of 28°C (84°F) and an increased average humidity of 85%. Notably, July experiences significantly more rainfall, totaling 270 mm (10.6 in) across 30 days. For more specifics about July weather, check out San Jose weather in July.
In January, temperatures in the region typically range from a minimum of 20°C (68°F) to a maximum of 27°C (82°F), with an average temperature of 24°C (75°F). Precipitation is quite notable during this month, amounting to 148 mm (5.8 in) over 22 days, and the humidity levels hover around 66%. In contrast, August experiences slightly warmer weather, with minimum temperatures at 22°C (72°F) and maximums reaching 29°C (85°F), resulting in an average of 25°C (77°F). However, August also brings significantly more rainfall, with 286 mm (11.2 in) of precipitation spread across 30 days, and humidity levels rise to 82%. This comparison highlights not only the warmth of August but also the increased moisture compared to January. For more details, you can check out San Jose weather in August.
In January, the weather in San Jose features milder temperatures, with a minimum of 20°C (68°F) and an average of 24°C (75°F), while maximum temperatures reach 27°C (82°F). This month experiences lower precipitation levels, totaling 148 mm (5.8 in) across 22 days, with humidity hovering around 66%. In contrast, September brings warmer conditions, with temperatures ranging from a minimum of 22°C (73°F) to an average of 25°C (78°F) and maximums hitting 29°C (84°F). However, it also sees significantly higher rainfall, with 272 mm (10.7 in) spread over 29 days and increased humidity at 80%. For more detailed information, you can check the San Jose weather in September.
In comparing the weather between January and October, January typically experiences slightly lower temperatures, with averages around 24°C (75°F) compared to October's average of 25°C (77°F). While both months are warm, October sees a higher minimum and maximum temperature, ranging from 22°C (72°F) to 28°C (83°F). Precipitation is significantly greater in October, with 387 mm (15.2 in) falling over 28 days, nearly doubling January's 148 mm (5.8 in) over 22 days. Additionally, humidity levels are higher in October, sitting at 79% compared to January's 66%. For more information, you can visit San Jose weather in October.
In comparing January and November weather, January typically features slightly cooler temperatures with minimums around 20°C (68°F), while November enjoys a marginally warmer minimum of 22°C (72°F). Both months average near 24°C (75°F), but November has higher maximum temperatures, reaching up to 28°C (82°F) compared to January's 27°C (82°F). Notably, November experiences significantly more rainfall, with 306 mm (12.0 in) spread over 28 days, whereas January sees only 148 mm (5.8 in) over 22 days. The humidity also peaks in November at 79%, compared to January's 66%. For a more detailed look at this month’s weather specifics, check out San Jose weather in November.
In comparing the weather between January and December, both months have similar temperature ranges, with average temperatures consistently around 24°C (75°F). However, January tends to be slightly drier, experiencing 148 mm (5.8 in) of precipitation over 22 days, while December sees increased rainfall, totaling 212 mm (8.3 in) across 27 days. Additionally, humidity levels are marginally higher in December at 70%, compared to January's 66%. For more details on December weather, you can check out this link: San Jose weather in December.
As January unfolds in San Jose, the city experiences notable contrasts compared to other months, with relatively warm temperatures that hover around the average of 24°C. While the days can be pleasantly sunny, the month is characterized by increased humidity and frequent rain, averaging 22 days of precipitation that contributes to a total of 148 mm for the month. This means that while visitors can enjoy the mild temperatures, they should also be prepared for the intermittent showers that define the season. For those looking to plan a trip, understanding these unique January conditions can enhance your experience in this vibrant city. For more detailed insights, check out the San Jose Climate.