Last updated: August 21, 2025
In October, Alajuela, Costa Rica, experiences a dynamic climate characterized by cool temperatures and significant precipitation. With maximum temperatures reaching 27°C (80°F) and an average of 20°C (68°F), the weather remains pleasantly mild. The month is marked by high humidity levels at 80%, creating a tropical atmosphere that complements the lush landscapes. Rainfall is prominent, totaling 570 mm (22.4 in) across approximately 29 days, offering a vibrant green canvas and fostering the region's diverse flora. October in Alajuela invites visitors to embrace its refreshing rains and breathtaking scenery.
In October, Alajuela experiences a mild and comfortable climate that sets it apart as a delightful transition into the heart of the rainy season. With minimum temperatures hovering around 15°C (60°F) and averages maintaining a steady 20°C (68°F), visitors and locals alike can enjoy a pleasant atmosphere. The maximum temperatures reach a cozy 27°C (80°F), making it ideal for outdoor activities, although the steady precipitation adds a refreshing twist to the month. This pattern is consistent with the overall trend seen throughout the year, where temperatures remain relatively stable, showcasing a unique balance between warmth and coolness that characterizes Alajuela's climate.
In October, Alajuela, Costa Rica, experiences its peak precipitation, with a staggering 570 mm (22.4 in) of rainfall over the course of 29 days. This significant deluge marks October as the wettest month of the year, further intensifying the lush landscapes typical of the region. Following the previous months, where rainfall began to ramp up, October's downpours create vibrant ecosystems but also remind residents of the challenges associated with heavy rain. Notably, the dramatic leap in precipitation from September’s 436 mm highlights October’s role in the rainy season's climax, setting the stage for a transition into the drier months that follow.
In October, Alajuela, Costa Rica, experiences a notable humidity level of 80%, reflecting the region's tropical climate. This month sees a slight dip from the high humidity peaks of June and July, which boast humidity levels of 84% and 85% respectively. Following the dry season, October's humidity is consistent with the trend established in September and November, both at 81% and 80%. This indicates a transitional period as the wet season takes hold, with humidity beginning to settle into a more comfortable range compared to the earlier months of the year, which hover around 66% to 69%. Overall, the data illustrates how October sits comfortably in the middle of Alajuela's humidity spectrum, serving as a reminder of the region's lush, verdant environment nurtured by consistent moisture.
In October, Alajuela, Costa Rica, continues to experience an extreme UV Index of 14, maintaining the high levels seen throughout the previous months. This consistent intensity, which necessitates a burn time of just 10 minutes, highlights a noteworthy trend of little fluctuation in UV exposure during the dry season. Following the peak in March and April with an index of 15, the UV levels in the subsequent months remain only slightly lower, indicating that sun protection is crucial year-round. As the sun's rays remain strong, visitors and locals alike should take heed of the Alajuela UV Index to safeguard their skin and enjoy the beautiful outdoors safely.
UV Risk Categories
In October, Alajuela, Costa Rica, enjoys a pleasant lull in sunshine, offering approximately 211 hours of sunlight. This marks a subtle dip from the sun-kissed months of March and April, which shine the brightest, featuring over 300 hours each. Following the rainier months of June and July, which see a significant drop in sunlight, October's moderate hours create a refreshing balance—ideal for outdoor exploration and the vibrant local culture. As the year progresses into November, sunshine levels bounce back to 229 hours, hinting at a climate that celebrates both the vibrant greens the rains bring and the warmth of sunny days. This transitional period makes October a charming time to experience the lush beauty of Costa Rica, where nature thrives under the sun.
In October, the likelihood of sunny weather in Alajuela, Costa Rica, is quite low, hovering around 14%. This places October among the months with the least sunshine, alongside the rainy season that characterizes the region from May to September. As the year progresses, a noticeable shift occurs; while the early months of the year—such as January and February—boast over 50% chances of sun, summer months take a downturn, with the probability of sunny days reaching a mere 6% in August. Interestingly, a slight increase in sunlight returns by November, climbing back to 27%, suggesting that those seeking brighter days might be better off planning their visits as the year winds down.
In Alajuela, Costa Rica, October marks a subtle shift in daylight duration, as the lush landscapes begin to transition toward the end of the year. With 11 hours of daylight, October mirrors January and February, hinting at a rhythmic pattern throughout the year. The peak months, from March to September, boast a generous 12 hours of daylight, allowing for ample time to explore the region's stunning biodiversity. As October rolls in, the gradual decrease in daylight signals the onset of the rainy season, inviting a period of rejuvenation for the vibrant flora and fauna. Following October, daylight gradually holds steady at 11 hours through November and December, creating a balanced and consistent light experience perfect for travelers and locals alike.
October in Alajuela, Costa Rica, brings a gentle embrace of calmness, as the average wind speed dips to 1.1 m/s (2 mph). This marks the quietest month of the year, following a gradual decline in wind during the rainy season, where stronger gusts in the first half of the year give way to a more tranquil atmosphere. From March's moderate breezes at 2.3 m/s (5 mph) to October's stillness, the transition reflects the region's shift towards lush greenery and cooler temperatures. As the month progresses, residents and visitors alike can revel in the serene, almost whispering winds that define Alajuela’s October charm.
Weather in Alajuela varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Alajuela, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in October and January, both months feature similar average temperatures, hovering around 20°C (68°F), but they exhibit significant differences in precipitation and humidity. October experiences a much higher level of rainfall, with 570 mm (22.4 in) spread over 29 days, leading to an average humidity of 80%. In contrast, January sees considerably less precipitation at just 32 mm (1.3 in) over 6 days, resulting in lower humidity levels of 68%. This makes January a drier and more comfortable month compared to the rainy and humid October. For a detailed look at the conditions in January, you can visit Alajuela weather in January.
When comparing the weather in October and February, October tends to be significantly wetter and more humid. With temperatures ranging from a minimum of 15°C (60°F) to a maximum of 27°C (80°F), October experiences an average temperature of 20°C (68°F) alongside high precipitation of 570 mm (22.4 in) over 29 days, leading to a humidity level of 80%. In contrast, February sees a slightly lower range in temperatures, with a minimum of 13°C (56°F) and a maximum of 28°C (83°F), maintaining the same average of 20°C (69°F). February features a stark reduction in rainfall, with only 13 mm (0.5 in) expected over just 3 days, contributing to a more comfortable humidity level of 68%. For more detailed insights, you can check Alajuela weather in February.
In comparing the weather of October and March, October tends to be much wetter and more humid. It has a minimum temperature of 15°C and an average of 20°C, with max temperatures reaching 27°C, along with significant precipitation of 570 mm over 29 days and a humidity level of 80%. In contrast, March experiences milder conditions with a lower humidity of 66%. Temperatures average slightly higher, with a minimum of 14°C and an average of 21°C, peaking at 28°C, and it boasts much less rain, receiving only 15 mm over just 4 days. For more detailed information about the weather in March, you can visit Alajuela weather in March.
When comparing the weather in October and April, notable differences emerge. October typically experiences slightly cooler temperatures with a minimum of 15°C (60°F) and an average of 20°C (68°F), while April warms up to an average of 21°C (70°F) and can reach a maximum of 29°C (85°F). Additionally, October is significantly wetter, with 570 mm (22.4 in) of precipitation over 29 days, compared to April's much drier climate with only 79 mm (3.1 in) over 16 days. Humidity also varies, with October at 80% and April at a more comfortable 67%. For more detailed information on the weather specifics in April, you can check Alajuela weather in April.
In comparing the weather of October and May, it is evident that both months experience mild temperatures, with October featuring a minimum of 15°C (60°F) and an average of 20°C (68°F), while May has slightly warmer temperatures with a minimum of 16°C (61°F) and an average of 21°C (70°F). Both months also see high humidity levels, but October is notably more humid at 80% compared to May’s 69%. Precipitation levels are significantly higher in October, with 570 mm (22.4 in) over 29 days, whereas May has 391 mm (15.4 in) over 27 days. For more detailed information on May weather, you can check Alajuela weather in May.
October and June share similar temperature ranges, with October having a minimum of 15°C (60°F) and an average of 20°C (68°F), while June starts slightly warmer with a minimum of 16°C (60°F) and an average of 21°C (70°F). Both months experience maximum temperatures around 27°C (80°F), but October is significantly wetter, receiving 570 mm (22.4 in) of precipitation over 29 days compared to June’s 351 mm (13.8 in) over 27 days. Additionally, humidity is slightly lower in October at 80%, compared to June's humidity of 84%. For a detailed look at June weather, visit Alajuela weather in June.
In comparing the weather between October and July, we find that both months experience similar maximum temperatures, hovering around 27°C (81°F). However, October tends to have slightly lower average and minimum temperatures, with averages at 20°C (68°F) and a minimum of 15°C (60°F), compared to July's 21°C (69°F) average and 16°C (61°F) minimum. Additionally, October is significantly wetter, featuring 570 mm (22.4 in) of precipitation over 29 days, while July receives only 233 mm (9.2 in) across 26 days. Humidity levels are also slightly higher in July at 85% compared to 80% in October. For a closer look at July's weather patterns, check out Alajuela weather in July.
In comparing the weather of October and August, both months display similar average temperatures, hovering around 20°C (68°F). However, October tends to be slightly cooler, with a minimum temperature of 15°C (60°F) compared to August's 16°C (60°F). Notably, October experiences significantly higher precipitation, receiving 570 mm (22.4 in) over 29 days, while August sees 331 mm (13.0 in) over 26 days. Humidity levels are relatively close, with October at 80% and August at 82%. For more details about the weather in August, you can visit Alajuela weather in August.
October and September have similar temperature ranges, with both months featuring minimums of 15°C (60°F), average temperatures around 20°C (68°F), and maximums hitting 27°C (80°F). However, October experiences significantly higher precipitation, totaling 570 mm (22.4 in) over 29 days compared to September, which sees 436 mm (17.2 in) over 28 days. Humidity remains relatively consistent across both months, at 80% in October and slightly higher at 81% in September. For more detailed information about September's weather, you can visit Alajuela weather in September.
October and November in Alajuela display similar temperature ranges, with October experiencing slightly warmer maximums at 27°C (80°F) compared to November’s 26°C (79°F). Both months have the same minimum temperature of 15°C (60°F) and average of 20°C (68°F). However, October is significantly wetter, with precipitation reaching 570 mm (22.4 in) over 29 days, while November sees much lighter rainfall of 209 mm (8.2 in) across just 19 days. The humidity remains constant at 80% for both months. For a detailed overview, you can check Alajuela weather in November.
October and December in the region showcase some notable differences in weather patterns. Both months have similar average temperatures, with October reaching a minimum of 15°C (60°F) and a maximum of 27°C (80°F), while December's temperatures slightly vary, peaking at 26°C (80°F). However, October experiences significantly higher precipitation, with a staggering 570 mm (22.4 in) over 29 days, compared to December's more manageable 63 mm (2.5 in) over just 11 days. Additionally, October maintains a higher humidity level of 80%, contrasted with December’s 72%. For those interested in a detailed overview, you can find more information at Alajuela weather in December.
October in Alajuela presents a unique blend of warm temperatures and lush rainfall, making it distinct from the drier months. With maximum temperatures hovering around a comfortable 27°C (80°F) and average conditions resting at 20°C (68°F), the weather remains inviting despite the high humidity of 80%. This month is characterized by nearly daily rainfall, contributing to an impressive total of 570 mm (22.4 in) over 29 rainy days, nurturing the vibrant flora of the region. Travelers can expect a refreshing, albeit wet, experience, showcasing Alajuela's natural beauty in full bloom during this transitional period. For a deeper insight into the patterns and characteristics of Alajuela's weather, check out Alajuela Climate.