Last updated: August 21, 2025
Experience January in Alajuela, Costa Rica, where the weather invites you to explore its vibrant landscapes. With daytime temperatures reaching a pleasant 27°C (82°F) and a comfortable average of 20°C (68°F), the climate is ideal for outdoor activities. Nights bring a cooler touch, with lows around 13°C (56°F). Although the month sees a total precipitation of 32 mm (1.3 in) over 6 days, it adds a refreshing element to the lush surroundings, enhancing the region's natural beauty. With humidity levels at 68%, you'll feel a hint of the tropical atmosphere that defines this captivating destination. Whether you're wandering through local markets or enjoying the scenic views, January's weather in Alajuela offers a delightful experience for every visitor.
In January, Alajuela, Costa Rica, greets visitors with a delightful climate characterized by a minimum temperature of 13°C (56°F) and a comfortable average of 20°C (68°F), peaking at a pleasant 27°C (82°F) during the day. This sets the tone for the dry season, where mild mornings and warm afternoons prevail. As the month progresses into February, temperatures show a slight upward trend, reaching highs of 28°C (83°F). The consistent averages around 20°C throughout the months indicate a stable and inviting atmosphere, perfect for outdoor activities. By April, warmth becomes more pronounced with maximums touching 29°C (85°F), while the evenings remain refreshingly cool. Overall, January’s climate beautifully transitions into a warmer February, laying the groundwork for a vibrant Central American experience.
In January, Alajuela, Costa Rica, experiences a relatively dry start to the year, with precipitation measuring just 32 mm (1.3 in) over six rainy days. This sets the stage for a gradual increase in rainfall as the months progress, with February and March seeing even lower totals of 13 mm (0.5 in) and 15 mm (0.6 in). However, as April arrives, the rainy season begins to assert itself, culminating in a dramatic spike with May's staggering 391 mm (15.4 in) over 27 days of rain. The trend continues through the middle of the year, with June and July presenting similarly lush conditions. By mid-year, Alajuela becomes accustomed to nearly daily precipitation, peaking in October with an impressive 570 mm (22.4 in), marking the height of the wet season before gradually tapering off in the following months. This rhythmic shift from January's gentle rains to the torrential downpours of late-year not only shapes the local climate but also nourishes the vibrant ecosystems that characterize this enchanting region.
In January, Alajuela, Costa Rica, experiences a comfortable humidity level of 68%, which remains consistent into February. As the months progress into March and April, humidity slightly decreases to 66% and 67% respectively, offering a brief respite before the wet season. However, as May arrives, humidity levels rise again, peaking sharply in the summer months of June and July, reaching 84% and 85%, respectively. This pattern illustrates a clear transition into the rainy season, where humidity remains elevated before gradually tapering off through the latter months of the year, culminating in December with a more moderate 72%. Overall, Alajuela’s humidity showcases a cyclical rhythm, marking the distinct shifts between its dry and wet seasons.
In January, Alajuela experiences a UV Index of 12, indicating extreme exposure, with a burn time of just 10 minutes. This high level of UV radiation marks the start of a trend that continues throughout the dry season, as the index rises to 13 in February and peaks at 15 in both March and April. Even as the month progresses into May and June, the index remains extraordinarily high, fluctuating between 14 and 15. The consistent extreme levels highlight the importance of sun protection during this period. Residents and visitors alike should be vigilant, as these conditions persist until the rainy season brings slight relief in the following months. For more detailed information, check out Alajuela UV Index.
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In January, Alajuela, Costa Rica, welcomes the year with an impressive 249 hours of sunshine, setting a vibrant tone for the months ahead. As January unfolds into February, the sun shines brighter, delivering 296 hours, and continues to surge through March, reaching a delightful 329 hours. This trend of increasing daylight peaks before slightly tapering off in April with 300 hours, showcasing the region's sun-soaked charm. However, as the rainy season approaches in May, the hours dip to 235, and further down to 226 in June, signaling a transition. The summer months see a gradual decline, with July and August offering 209 and 213 hours respectively. Despite this, September brings a slight resurgence to 230 hours, only for the sunshine to once again falter as the year rolls into its final months, with 211 hours in October and 229 in November, before soaring back up to 291 hours in December. This annual cycle highlights Alajuela's vibrant sunshine, making it an appealing destination for those seeking warmth and light throughout the year.
In January, Alajuela, Costa Rica enjoys a relatively favorable 52% chance of sunny weather, making it one of the better months for sun-seekers. As the year progresses into February and March, the likelihood of sunshine dips to 48% and 45%, respectively, indicating a subtle transition towards the rainy season. By April, this trend continues as the sun's presence declines significantly to just 20%, with the months that follow—May through August—each experiencing even lower chances of sunny days, hovering between 6% and 17%. However, a glimmer of hope returns in November, when the sun shines again 27% of the time, suggesting a slow awakening from the rainy spell. This data highlights January as an appealing window for outdoor activities and exploration before the lush, verdant landscapes are nourished by the approaching rains.
In Alajuela, Costa Rica, January kicks off the year with 11 hours of daylight, a duration that remains consistent into February. As the months progress into March, daylight begins to extend, reaching a robust 12 hours that persists through much of the year until October. This period of consistent daylight not only supports an energetic lifestyle but also enhances the region's vibrant outdoor culture. As the calendar shifts towards the end of the year, November and December return to 11 hours of daylight, creating a balanced cycle that reflects the natural rhythm of this beautiful locale. Embracing both sun and shade, Alajuela’s daylight trends serve as a backdrop for the rich experiences found throughout the year.
In January, Alajuela, Costa Rica, welcomes the new year with a gentle breeze, boasting an average wind speed of 2.4 m/s (5 mph). This moderate wind picks up slightly in February and March, maintaining a consistent pace that complements the lush surroundings. However, as the months roll into April and May, the winds begin to soften, dropping to 1.7 m/s (4 mph) and 1.5 m/s (3 mph), creating a calmer atmosphere as the region transitions towards the rainy season. From June through August, the winds remain subdued at around 1.2 m/s to 1.5 m/s (2-3 mph), enhancing the tropical tranquility. Interestingly, a brief revival occurs in November, matching the January gusts at 1.7 m/s (4 mph), a reminder of the winds’ playful nature. The year wraps up with another increase in December, bringing a comforting familiarity as the average wind returns to a brisk 2.1 m/s (5 mph). Overall, January's weather sets the tone for a year of gentle and variable breezes, inviting both adventure and relaxation.
Weather in Alajuela varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Alajuela, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparison to January, February experiences slightly warmer temperatures, with a maximum average of 28°C (83°F) compared to January's 27°C (82°F). Both months have a minimum temperature of 13°C (56°F) and an average around 20°C (68°F). However, February sees significantly less precipitation, with only 13 mm (0.5 in) over 3 days, while January has 32 mm (1.3 in) spread across 6 days. The humidity remains consistent at 68% for both months, making for generally comfortable weather. For more details on the weather specific to this time, you can check Alajuela weather in February.
In comparing the weather between January and March, we observe a slight increase in temperatures. January has a minimum temperature of 13°C (56°F) and an average of 20°C (68°F), while March's temperatures start at a minimum of 14°C (57°F) and reach an average of 21°C (70°F). Both months experience warm highs, with January peaking at 27°C (82°F) and March slightly higher at 28°C (83°F). Precipitation is notably lower in March, with only 15 mm (0.6 in) over 4 days compared to January's 32 mm (1.3 in) over 6 days, and humidity remains relatively consistent at 68% in January and 66% in March. For more detailed insights, you can check Alajuela weather in March.
January and April weather in Alajuela show some notable differences. In January, temperatures range from a minimum of 13°C (56°F) to a maximum of 27°C (82°F), with an average of 20°C (68°F) and relatively low humidity at 68%. The month experiences about 32 mm (1.3 in) of rainfall over approximately 6 days. In contrast, April brings slightly warmer temperatures, with a minimum of 15°C (58°F) and a maximum of 29°C (85°F), averaging 21°C (70°F). However, April also sees an increase in precipitation, totaling 79 mm (3.1 in) over 16 days, resulting in a more humid environment with humidity at 67%. For more details, you can visit Alajuela weather in April.
In January, the weather in Alajuela generally features milder temperatures, with a minimum of 13°C (56°F) and an average of 20°C (68°F), peaking at 27°C (82°F). Precipitation is relatively low during this month, totaling 32 mm (1.3 in) over about six days and maintaining a humidity of 68%.
In contrast, May sees slightly warmer temperatures, with a minimum of 16°C (61°F) and an average of 21°C (70°F), peaking at 28°C (83°F). However, May is marked by significantly higher precipitation, with a total of 391 mm (15.4 in) spread across 27 days, while humidity remains almost the same at 69%.
For more detailed information about the weather in May, you can visit Alajuela weather in May.
In January, the weather in Alajuela is relatively mild, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 27°C (82°F) and an average temperature of 20°C (68°F). The month sees lower precipitation levels, with only 32 mm (1.3 in) recorded over six days, while humidity rests at a comfortable 68%. In contrast, June experiences warmer conditions with temperatures starting at a minimum of 16°C (60°F) and reaching a maximum of 27°C (81°F), averaging 21°C (70°F). However, June is notably wetter, with an impressive 351 mm (13.8 in) of rainfall over 27 days and humidity levels climbing to 84%. This stark difference highlights the shift from a drier start to the year to a much wetter summer month. For more specific insights on the June weather in Alajuela, you can visit Alajuela weather in June.
In January, the weather is generally mild, with average temperatures ranging from a comfortable 20°C (68°F) to a maximum of 27°C (82°F). The month sees relatively low precipitation of about 32 mm (1.3 in) over approximately 6 days, along with humidity levels at 68%. In contrast, July experiences slightly warmer minimum temperatures at 16°C (61°F) and maintains an average around 21°C (69°F), but it is characterized by significantly higher rainfall at 233 mm (9.2 in) over 26 days, contributing to a humidity level of 85%. The contrast between these two months illustrates the shift from a drier to a much wetter climate. For more specific details on the conditions in July, you can check the link: Alajuela weather in July.
In January, the weather features mild temperatures with a minimum of 13°C (56°F) and an average of 20°C (68°F), peaking at 27°C (82°F). The month experiences relatively low precipitation at 32 mm (1.3 in) over about 6 days, along with a humidity level of 68%. In contrast, August sees a slight increase in minimum temperature at 16°C (60°F) and a maximum that remains the same at 28°C (82°F), but averages just marginally higher at 20°C (69°F). However, this month is significantly wetter, with rainfall reaching 331 mm (13.0 in) across 26 days, resulting in higher humidity at 82%. For more detailed information on the weather in this month, you can check Alajuela weather in August.
When comparing the weather in January and September, both months exhibit similar average temperatures, hovering around a comfortable 20°C (68°F). However, January features a milder minimum temperature of 13°C (56°F) compared to September's 15°C (60°F). One of the most notable differences lies in precipitation; January experiences significantly less rain, totaling only 32 mm (1.3 in) over 6 days, while September is much wetter with 436 mm (17.2 in) over 28 days. This increase in rainfall contributes to higher humidity levels in September, reaching 81%, compared to January's 68%. For more details on the weather in September, visit Alajuela weather in September.
In January, the weather in Alajuela is generally mild, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 27°C (82°F) and an average of 20°C (68°F). The month sees relatively low precipitation at 32 mm (1.3 in) over just 6 days, coupled with a humidity level of 68%. In contrast, October is characterized by significantly wetter conditions, boasting a substantial increase in rainfall to 570 mm (22.4 in) and precipitation on 29 days. Despite a slight rise in the minimum temperature to 15°C (60°F), the overall average remains the same at 20°C (68°F), while humidity rises to 80%. This stark contrast makes January a more pleasant month for outdoor activities, whereas October's weather is marked by frequent rain and higher humidity. For more information on Alajuela's October weather, visit Alajuela weather in October.
In January, the weather in Alajuela is generally warm and pleasant, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 27°C (82°F) and an average temperature of 20°C (68°F). The month sees relatively low precipitation at 32 mm (1.3 in) over just 6 days, with humidity levels at 68%.
In contrast, November experiences slightly warmer nights with a minimum temperature of 15°C (59°F) and a maximum of 26°C (79°F), while the average remains at 20°C (68°F). However, November is much wetter, receiving 209 mm (8.2 in) of rain across 19 days and higher humidity at 80%. For more detailed insights, you can explore Alajuela weather in November.
January and December in Alajuela present relatively similar average temperatures, with January experiencing a slightly wider range, boasting minimums of 13°C (56°F) and maximums of 27°C (82°F). In contrast, December has a slightly higher minimum of 15°C (58°F) and a maximum of 26°C (80°F). However, December is characterized by significantly more precipitation, with 63 mm (2.5 in) over 11 days compared to January's 32 mm (1.3 in) over only 6 days. Humidity levels remain comparable, but December is marginally more humid at 72% versus January’s 68%. For a deeper look at conditions during the festive season, check out Alajuela weather in December.
In January, Alajuela experiences a delightful mix of warm temperatures and refreshing breezes, setting it apart from other months. With an average temperature around 20°C, this time of year offers a perfect escape from the heat, making it ideal for outdoor activities. While a bit of rain may grace the region with occasional showers, the overall humidity remains comforting rather than oppressive. Compared to the wetter months that follow, January provides a gentle introduction to the rainy season, allowing visitors to enjoy the lush scenery without the frequent downpours. To learn more about the weather in Alajuela throughout the year, check out Alajuela Climate.