Last updated: August 21, 2025
December in San Ramon, Costa Rica offers a delightful tropical experience, with temperatures ranging from a pleasant 18°C (65°F) at night to a warm 30°C (86°F) during the day, averaging around 23°C (74°F). This month is characterized by high humidity at 72%, contributing to a lush, vibrant landscape. However, visitors should be prepared for frequent rains, as December sees about 72 mm (2.8 in) of precipitation spread across 18 days. The combination of warm temperatures and regular showers creates a unique charm, making it an enchanting time to explore this lush destination.
In December, San Ramon, Costa Rica experiences delightful temperatures that reflect the vibrant transition from the rainy season to drier, sunnier days. With a minimum of 18°C (65°F) and a comfortable average of 23°C (74°F), the weather is pleasantly mild, making it ideal for outdoor exploration. The maximum temperature can reach up to 30°C (86°F), inviting locals and visitors alike to bask in the tropical warmth. As the year winds down, December's weather offers a blend of refreshing breezes and sunny afternoons, signaling the perfect time to enjoy the lush surroundings and festive atmosphere that characterize this picturesque area.
December in San Ramon, Costa Rica, marks a transition into the drier season, showcasing a noticeable decrease in precipitation compared to the preceding months. With 72 mm (2.8 inches) of rain falling over 18 days, December experiences less intensity than the heavy downpours of the rainy season, which peaks in October with 639 mm (25.2 inches). As the year wraps up, both the amount and frequency of rainfall diminish, offering a reprieve from the relentless rains of previous months. This shift not only signals a cooler, more pleasant climate but also sets the stage for the drier months ahead, inviting both locals and visitors to enjoy the vibrant landscape after the lush rainy season.
In December, humidity levels in San Ramon, Costa Rica settle at a comfortable 72%, showing a notable decrease from the peak of the rainy season in June and July, which reach 84% and 85% respectively. As the year draws to a close, humidity gradually declines after the wetter months, allowing for a more pleasant atmosphere that still retains the lush vibrancy characteristic of the region. Overall, the data indicates a general humidity trend that starts high mid-year and begins to taper off into the final months, with December striking a balance between the lush greenery of the rainy season and the drier spells of earlier months.
In December, San Ramon experiences a notable decrease in the UV Index, dropping to 10, which falls into the very high exposure category. This reduction offers a brief respite from the extreme UV levels seen in the preceding months, where values peaked at 15 in both March and April. While December still necessitates vigilance, with a burn time of just 15 minutes, it is a shift that highlights the seasonal fluctuations in UV exposure. Travelers and locals alike can take advantage of these slightly lower levels, but it’s vital to remain sun-safe. For more detailed insights, visit San Ramon UV Index.
UV Risk Categories
In December, San Ramon, Costa Rica, basks in a delightful 291 hours of sunshine, a charming prelude to the new year. This month's hours reflect a robust uptick from the darker days of July and August, where sunshine dipped below 220 hours, showcasing the region's transition into a more radiant season. The gradual ascent from 235 hours in May to 300 hours in April sets the stage for a vibrant festive atmosphere, making December a perfect time for outdoor adventures and soaking in the lush landscapes. With these sunny skies, locals and travelers alike can revel in the natural beauty, as the year winds down with warmth and light in the heart of Costa Rica.
In San Ramon, Costa Rica, the likelihood of encountering sunny weather in December is quite promising, with a 56% chance of sun—just slightly below January's peak of 57%. This near-stability in sunny conditions reflects a trend where the end of the year often offers a refreshing departure from the cloudy and rainy days of the previous months. As the rainy season wraps up in November, which has a 31% chance of sunshine, December beckons with a renewed potential for outdoor enjoyment. As you plan your visit, you can expect a pleasant mix of clear skies and warm temperatures, making it an ideal time to revel in the lush beauty of Costa Rica.
In December, San Ramon, Costa Rica enjoys approximately 11 hours of daylight, which is consistent with the shorter days experienced in January and February. As the year transitions from winter to spring, daylight hours gradually increase, peaking at 12 hours from March through October. This trend reflects the region's tropical climate, where daylight duration remains relatively stable year-round. As the last month of the year settles in, the return to 11 hours of daylight marks a gentle shift towards the longer evenings typical of the dry season, creating a serene atmosphere perfect for enjoying the lush landscapes and vibrant culture of this beautiful locale.
In December, the winds of San Ramon, Costa Rica, begin to stir with a gentle breeze averaging 1.6 m/s (4 mph), subtly preparing the landscape for the festive season ahead. This slight uptick from November’s 1.4 m/s marks a transition into a more inviting atmosphere, where the air feels crisp yet comforting. As the year closes, the winds are notably calmer than the stronger gusts seen earlier in the year, peaking at 2.1 m/s in March. The overall trend reveals a gradual decline in wind speed from the preliminary months to November, followed by December's modest revival, encapsulating the serene beauty of Costa Rica's end-of-year charm. This gentle wind not only enhances the lush surroundings but also invites locals and visitors alike to embrace the festive spirit permeating the air.
Weather in San Ramon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Ramon, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January weather in the region show some notable similarities and differences. In December, temperatures range from a minimum of 18°C (65°F) to a maximum of 30°C (86°F), with an average of 23°C (74°F). The month experiences significant rainfall, with 72 mm (2.8 in) of precipitation spread over 18 days, contributing to a higher humidity level of 72%.
In contrast, January sees slightly cooler temperatures, with a minimum of 17°C (63°F) and a maximum of 31°C (87°F), maintaining the same average of 23°C (74°F). Precipitation drops significantly to 28 mm (1.1 in), occurring over just 7 days, resulting in a lower humidity level of 68%. For a more detailed look at January weather, you can check San Ramon weather in January.
When comparing December and February weather, December tends to have slightly warmer temperatures with an average of 23°C (74°F) compared to February's average of 24°C (76°F). However, February enjoys more favorable conditions with significantly lower precipitation levels, receiving only 13 mm (0.5 in) over just three days, while December sees 72 mm (2.8 in) spread across 18 days. Additionally, February's humidity is slightly lower at 68%, compared to December's 72%, making the overall conditions a bit drier and more pleasant. For more specific details about the weather during this month, you can check San Ramon weather in February.
In December, the weather is generally milder with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 30°C (86°F), accompanied by a higher humidity level of 72%. December sees more rainy days, accumulating about 72 mm (2.8 in) of precipitation over 18 days. Conversely, March experiences warmer temperatures, with an average of 25°C (77°F) and highs reaching 32°C (89°F), but the humidity decreases to 66%. Notably, March is considerably drier, with only 18 mm (0.7 in) of rain over just 4 days, making it a more pleasant time for outdoor activities. For more specifics, check the detailed forecast at San Ramon weather in March.
In December, temperatures in San Ramon range from a minimum of 18°C (65°F) to a maximum of 30°C (86°F), with an average temperature of 23°C (74°F). The month sees a moderate level of precipitation, totaling 72 mm (2.8 in) over 18 days, and humidity levels around 72%. In contrast, April offers slightly warmer conditions with an average temperature of 24°C (76°F), reaching a maximum of 31°C (89°F) and maintaining the same minimum of 18°C (64°F). Precipitation in April is higher, totaling 118 mm (4.6 in), distributed over 24 days, while humidity drops slightly to 67%. For a detailed look at April's weather, check out San Ramon weather in April.
In comparing the weather between December and May, both months exhibit similar temperature ranges, with December experiencing a minimum temperature of 18°C (65°F) and an average of 23°C (74°F), while May starts with a slightly higher minimum of 19°C (67°F) and averages at 24°C (75°F). However, a significant difference lies in the precipitation levels; December sees about 72 mm (2.8 in) of rain over 18 days, whereas May is much wetter, with 412 mm (16.2 in) falling across 30 days. Despite the increased rainfall in May, humidity levels are somewhat comparable, with December at 72% and May slightly lower at 69%. For more detailed insights on the weather specifics, you can check San Ramon weather in May.
When comparing the weather in December and June, both months exhibit warm temperatures, with maximums reaching 30°C (86°F). However, December features slightly lower temperatures, with an average of 23°C (74°F), compared to June's 24°C (75°F). December also has relatively less rainfall, experiencing 72 mm (2.8 in) over 18 days, while June sees significantly increased precipitation at 397 mm (15.6 in) across 30 days. Furthermore, June has a higher humidity level at 84%, compared to December's 72%. For more detailed information about June weather, you can visit San Ramon weather in June.
December and July offer distinct weather patterns, showcasing the variability of the climate. In December, temperatures range from a minimum of 18°C (65°F) to a maximum of 30°C (86°F), with an average of 23°C (74°F). This month experiences moderate rainfall, totaling 72 mm (2.8 in) over 18 days, along with a humidity level of 72%. In contrast, July sees slightly warmer temperatures, with a minimum of 19°C (67°F) and an average of 24°C (75°F), though the maximum temperature is slightly lower at 29°C (85°F). However, precipitation is significantly higher in July, accumulating to 296 mm (11.7 in) over 30 days, and humidity peaks at 85%. For a more detailed look at July weather, take a look at San Ramon weather in July.
When comparing the weather in December and August, both months exhibit similar average temperatures, with December having a slight edge at a minimum of 18°C (65°F) and a maximum of 30°C (86°F) compared to August's minimum of 19°C (66°F) and maximum of 30°C (85°F). However, the contrast becomes clear in terms of precipitation; December sees significantly less rainfall at 72 mm (2.8 in) over 18 days, while August experiences a much wetter climate with 393 mm (15.5 in) across 30 days. Additionally, August is characterized by a higher humidity level of 82%, compared to December's 72%. For more detailed insights into August weather, you can visit San Ramon weather in August.
When comparing the weather in December and September, we see some notable differences despite similar average temperatures. Both months have a minimum temperature around 18°C (65-66°F) and an average of 23°C (74°F), but December tends to be slightly warmer with a maximum of 30°C (86°F) compared to September's 29°C (85°F). However, September experiences significantly more precipitation, with 461 mm (18.2 in) over 29 days, while December has only 72 mm (2.8 in) across 18 days. Additionally, humidity levels are higher in September at 81% compared to December's 72%, contributing to a more humid feel during that month. For more details on September weather, you can check out San Ramon weather in September.
In December, the weather remains warm with a minimum temperature of 18°C (65°F) and an average of 23°C (74°F), peaking at 30°C (86°F). This month experiences less rainfall, totaling 72 mm (2.8 in) over 18 days, with a humidity level of 72%. In contrast, October is notably wetter, accumulating 639 mm (25.2 in) of precipitation across 30 days, which contributes to a higher humidity of 80%. Despite similar minimum and average temperatures, the overall feeling of October can be quite different due to the increased rainfall. For more details, you can check San Ramon weather in October.
In comparing the weather between November and December, we see some notable differences. Both months share a similar temperature range, with December experiencing a slightly warmer maximum at 30°C (86°F) compared to November's 29°C (85°F). However, November is significantly wetter, receiving 251 mm (9.9 in) of precipitation over 28 days, while December's rainfall decreases to 72 mm (2.8 in) across 18 days. Additionally, humidity is higher in November at 80%, compared to December's 72%. For a more detailed look at November’s weather patterns, check out San Ramon weather in November.
As December unfolds in San Ramon, the weather offers a delightful shift from the rest of the year. With higher humidity levels and increased precipitation, this month embraces a more tropical ambiance, marked by the vibrant green surroundings. Unlike the dryer months, December brings a refreshing average temperature that invites both residents and visitors to enjoy the outdoors, despite the intermittent rain showers. Whether you're exploring the lush landscapes or soaking in the cultural charm of the town, December’s weather paints a picturesque backdrop for any adventure. For more detailed insights, check out San Ramon Climate.