Last updated: August 21, 2025
In January, Rio San Juan experiences a delightful blend of warm temperatures and refreshing humidity. With maximums reaching 28°C (82°F) and an average of 25°C (77°F), visitors can enjoy comfortable days alongside the tropical charm. Nighttime temperatures dip to a pleasant 21°C (71°F), ideal for evening strolls. Despite being the month with 66 mm (2.6 in) of rainfall over approximately 15 days, the showers contribute to the lush landscapes, making January a vibrant time to explore the natural beauty of the Dominican Republic. With a humidity level around 65%, expect a refreshing atmosphere that complements the warm coastal air.
In Rio San Juan, Dominican Republic, January boasts delightful temperatures that set the tone for the year. With nighttime lows around 21°C (71°F), the days warm up to a pleasant average of 25°C (77°F) and peak at 28°C (82°F). This mild start is mirrored in February and March, where temperatures remain consistently comfortable, with an average hovering around the same, suggesting a stable climate ideal for outdoor activities and beach visits. As the months progress into April and May, slight increases in temperature signal the onset of warmer days, culminating in the summer months, where highs reach 30°C (86°F) and beyond. Overall, January in Rio San Juan offers a perfect blend of warmth and comfort, enticing visitors to soak up the tranquil Caribbean ambiance while enjoying the refreshing coastal breezes.
In January, Rio San Juan experiences a moderate amount of precipitation, with 66 mm (2.6 in) of rain falling over approximately 15 days. This sets the stage for a wet season that gradually intensifies as the months progress. Notably, February sees a slight increase to 70 mm (2.7 in) of rainfall across 20 days, hinting at a shift toward more frequent showers. As spring approaches, rainfall peaks in March at 112 mm (4.4 in), showcasing a trend of increasing precipitation. The wettest months, however, are September and November, highlighting a distinct pattern where rainfall follows a cyclical rise, ultimately reaching its zenith during the late summer and early fall. This pattern emphasizes Rio San Juan's tropical climate, where precipitation plays a crucial role in shaping the lush surroundings.
In January, Rio San Juan welcomes the year with an average humidity level of 65%, setting a comfortable tone that gradually shifts as the months progress. As February rolls in, humidity slightly dips to 63%, marking the beginning of a trend toward lower moisture levels that peaks in April and May, where it hovers around 57%. However, as the summer approaches, the humidity begins to climb again, rising notably in August to 71% and peaking in September at 73%. This return to higher humidity levels at the onset of the wet season signals a transition from the drier months of early spring to the lush, vibrant conditions of late summer and fall, with December closing out the year at 69%, balancing between the dry and humid extremes.
In January, Rio San Juan experiences a UV Index of 9, categorizing it as very high with a burn time of just 15 minutes. As the months progress into February and March, the situation intensifies, with the UV Index soaring to 11 and 13 respectively, both classified as extreme. This high index continues through the spring into the summer, maintaining peak levels of 13 for four straight months, signaling that sun safety becomes crucial. By the onset of October, there's a slight decline to an index of 11, then tapering off to 9 in November and 8 in December, as the sun's intensity begins to ease. This clear progression highlights the importance of vigilance in sun protection during the first half of the year. For more details, check the Rio San Juan UV Index.
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In January, Rio San Juan, Dominican Republic, greets the year with a delightful 251 hours of sunshine, setting a warm and inviting tone for the months to come. As the calendar turns to February, the sun's embrace strengthens, boasting 302 hours of radiant light, while March brings even more cheer with 338 hours. This trend continues, peaking in the lush summer months, where June and July bask in a brilliant 355 and 361 hours, respectively. As the seasons transition into autumn, sunshine remains plentiful, though gradually waning to 290 hours in November before stabilizing at 314 hours in December. Overall, Rio San Juan shines brightly throughout the year, with a gradual increase leading to its sun-drenched zenith, making it a perfect destination for those seeking warmth and vibrancy.
In Rio San Juan, January greets visitors with a 45% chance of sunny weather, marking the start of the year with a mix of sun and clouds. This is notably lower compared to the following months, where February jumps to a bright 67%, showcasing a trend towards increasing sunshine as winter transitions into spring. As the year progresses, March and April maintain healthy probabilities of 62% and 56% respectively, suggesting that after January, it's smooth sailing for sun-seekers. However, the summer months take a dip, particularly in June and August, where the likelihood sinks to 37% and 38%. As the calendar rolls towards December, the chance of sun rises again, hitting 62%, wrapping up the year on a high note and hinting that while January may present a somewhat subdued start, the sun is sure to shine brighter in the months ahead.
In Rio San Juan, Dominican Republic, the daylight duration varies gracefully throughout the year, showcasing a rhythmic pattern that enhances the region's vibrant atmosphere. In January and February, daylight stays steady at 11 hours, perfect for enjoying the temperate climate. As spring approaches in March and April, the days lengthen to 12 hours, inviting more opportunities for outdoor adventures. The peak of summer in May, June, and July boasts the longest days at 13 hours, allowing locals and visitors alike to soak up the sun. As the year winds down, daylight diminishes again in August and September to 12 hours, and by late autumn and winter, it settles back to 11 hours in October and November, culminating in 10 hours by December. This cyclical progression not only marks the passage of seasons but also highlights the allure of coastal living throughout the year.
In January, the winds in Rio San Juan, Dominican Republic, begin to brush the coastline with an average speed of 4.9 m/s (11 mph), setting the tone for a breezy start to the year. As February approaches, wind speeds pick up to 6.4 m/s (14 mph), hinting at a lively transition into the later months. Following this peak, the winds stabilize around 5.4 m/s (12 mph) to 5.3 m/s (12 mph) from March through May, providing a pleasant consistency that is perfect for outdoor activities. By July, the winds reach a gentle uptick at 5.8 m/s (13 mph), making summer days feel refreshingly cool. However, as summer wanes into August, the winds slightly retreat to 5.2 m/s (12 mph). In contrast, the fall months see a gradual decline, with September recording the lowest average wind speed of 3.8 m/s (8 mph). The trend persists into the remaining months, as the winds gently rise back to 4.8 m/s (11 mph) in December, embracing the festive season with a soft yet invigorating breeze. Overall, January's winds serve as a refreshing herald of the dynamic weather patterns that define the region throughout the year.
Weather in Rio San Juan varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Rio San Juan, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, the weather features a minimum temperature of 21°C (71°F), an average of 25°C (77°F), and a maximum of 28°C (82°F), accompanied by 66 mm (2.6 in) of precipitation over 15 days and a humidity level of 65%. In contrast, February maintains similar temperature ranges with a minimum of 21°C (69°F), an average of 25°C (76°F), and a maximum of 28°C (83°F). However, February experiences slightly more precipitation, totaling 70 mm (2.7 in) over 20 days, along with a marginally lower humidity of 63%. For more detailed weather information, check out Rio San Juan weather in February.
In comparing the weather between January and March, both months exhibit similar temperature ranges, with January recording a minimum of 21°C (71°F), an average of 25°C (77°F), and a maximum of 28°C (82°F), while March features almost identical temperatures with a minimum of 21°C (71°F), an average of 25°C (76°F), and a slightly higher maximum of 28°C (83°F). However, March experiences significantly more precipitation, totaling 112 mm (4.4 in) over 18 days, compared to January's 66 mm (2.6 in) spread across 15 days. Additionally, humidity levels are slightly lower in March at 59%, in contrast to January's 65%. For more details, you can check Rio San Juan weather in March.
When comparing the weather in January and April, both months feature warm temperatures, but April tends to be slightly warmer. In January, the minimum temperature averages around 21°C (71°F), with a maximum reaching 28°C (82°F), while April sees a minimum of 22°C (72°F) and a maximum of 29°C (84°F). Precipitation levels are quite similar, with January receiving 66 mm (2.6 in) over 15 days and April totaling 68 mm (2.7 in) over 17 days. However, humidity is lower in April at 58%, compared to January's 65%. For more specifics on April weather, check out Rio San Juan weather in April.
In January, the weather in Rio San Juan features a minimum temperature of 21°C (71°F), an average of 25°C (77°F), and a maximum of 28°C (82°F), accompanied by 66 mm (2.6 in) of rainfall over 15 days, resulting in a humidity level of 65%. In contrast, May experiences slightly warmer temperatures with a minimum of 22°C (72°F), an average of 26°C (79°F), and a maximum of 30°C (86°F). However, it also brings more precipitation at 81 mm (3.2 in) across 19 days, while the humidity decreases to 57%. For more detailed insights, visit Rio San Juan weather in May.
In January, the weather in Rio San Juan features a minimum temperature of 21°C (71°F) and averages around 25°C (77°F), with a maximum of 28°C (82°F). The month sees around 66 mm (2.6 in) of precipitation over 15 days, alongside a humidity level of 65%. In contrast, June experiences slightly warmer temperatures, with a minimum of 24°C (76°F) and an average of 27°C (81°F), peaking at 29°C (85°F). Although June has a slightly lower total rainfall of 60 mm (2.4 in), it has a higher number of rainy days at 19, and the humidity is more comfortable at 57%. For more details, you can check Rio San Juan weather in June.
January and July present distinct weather patterns in Rio San Juan. January experiences milder temperatures, with a minimum of 21°C (71°F) and an average of 25°C (77°F), while July sees slightly warmer temperatures, ranging from a minimum of 24°C (76°F) to an average of 27°C (81°F). Precipitation in January is moderate, totaling 66 mm (2.6 in) over 15 days, compared to July, which has a higher precipitation level of 103 mm (4.1 in) spread over 23 days. Interestingly, humidity remains relatively stable, with January at 65% and July slightly lower at 63%. For a more detailed overview of July weather, you can check Rio San Juan weather in July.
In comparing the weather between January and August, January features milder temperatures with a minimum of 21°C (71°F) and an average of 25°C (77°F), while August sees a rise, with minimum temperatures starting at 24°C (76°F) and averaging 27°C (82°F). The maximum temperatures are also higher in August, reaching 31°C (88°F) compared to January's 28°C (82°F). Additionally, August experiences more precipitation, averaging 99 mm (3.9 in) over 22 days, compared to January's 66 mm (2.6 in) over 15 days. Humidity levels are slightly higher in August at 71%, compared to 65% in January. For more detailed information, you can check Rio San Juan weather in August.
When comparing the weather in January and September, a noticeable difference in temperature and precipitation emerges. January features a milder climate with temperatures ranging from a minimum of 21°C (71°F) to a maximum of 28°C (82°F), averaging around 25°C (77°F). In contrast, September boasts higher temperatures, with a minimum of 24°C (76°F) and a maximum reaching 31°C (88°F), resulting in an average of 27°C (82°F). Additionally, precipitation increases significantly in September, totaling 145 mm (5.7 in) over 20 days, compared to January's 66 mm (2.6 in) spread over 15 days. Humidity levels also rise from 65% in January to 73% in September, contributing to a more humid atmosphere. For more detailed insights, check out Rio San Juan weather in September.
In January, the weather is generally warm with temperatures ranging from a minimum of 21°C (71°F) to a maximum of 28°C (82°F), averaging around 25°C (77°F). There are approximately 15 days of rain, contributing to a total precipitation of 66 mm (2.6 in) and a humidity level of 65%. In contrast, October sees slightly warmer temperatures, with a minimum of 24°C (76°F) and a maximum of 30°C (87°F), averaging 27°C (81°F). However, it experiences more rainfall, with 102 mm (4.0 in) over 22 days and increased humidity at 72%. For more detailed information, you can check Rio San Juan weather in October.
When comparing the weather in January and November, there are some notable differences. January typically has minimum temperatures around 21°C (71°F) and an average of 25°C (77°F), while November sees slightly warmer conditions with a minimum of 24°C (75°F) and an average of 26°C (80°F). Precipitation levels also vary, with January receiving 66 mm (2.6 in) over 15 days, compared to November, which experiences 110 mm (4.3 in) over 21 days. Additionally, November has higher humidity, averaging 72%, compared to January's 65%. For more information, you can check out the link: Rio San Juan weather in November.
In comparing January and December weather in Rio San Juan, it's clear that both months experience warm temperatures, though January tends to be slightly cooler. In January, the minimum temperature is 21°C (71°F) with an average of 25°C (77°F) and a maximum of 28°C (82°F). In contrast, December has a higher minimum of 23°C (74°F), averaging 25°C (78°F) and reaching a maximum of 29°C (85°F). Precipitation is also more frequent in December, with 83 mm (3.3 in) over 22 days compared to January's 66 mm (2.6 in) over 15 days. Additionally, December sees slightly higher humidity levels at 69% compared to January's 65%. For more detailed insights, check out Rio San Juan weather in December.
As January settles over Rio San Juan, visitors can expect a pleasant blend of warm temperatures and moderate humidity, marking a shift from the warmer months. With the average temperature hovering around a comfortable 25°C (77°F), this month stands out as an ideal time for outdoor explorations. However, the region does experience increased precipitation, with about half the month seeing rain, contributing to the lush landscapes characteristic of this tropical haven. Comparatively, while other months may boast higher temperatures or less rain, January strikes a balance, inviting travelers to enjoy both the serene atmosphere and vibrant natural beauty without the intense heat. For more detailed insights into the yearly weather patterns, check out Rio San Juan Climate.