Last updated: August 31, 2025
Experiencing January in Arecibo, Puerto Rico offers a delightful tropical retreat, characterized by an average temperature of 24°C (76°F). With maximum highs reaching 29°C (84°F) and minimums dropping to a comfortable 18°C (65°F), it provides ideal conditions for outdoor activities. Though the month sees about 41 mm (1.6 in) of rainfall across 11 days, the high humidity of 76% adds to the lush, vibrant scenery. Embrace the warmth and occasional showers as you explore the picturesque landscapes that this charming coastal town has to offer!
In January, Arecibo, Puerto Rico enjoys a pleasant climate, with temperatures ranging from a cool 18°C (65°F) at night to a comfortable 29°C (84°F) during the day, averaging around 24°C (76°F). As the month progresses, a gradual warming trend emerges, leading into February when nighttime lows increase to 20°C (68°F) and daytime highs reach 30°C (86°F). This consistent rise in temperatures continues into March and April, culminating in mild evenings and warm days that characterize the region's winter/spring transition. The stability of the average temperature at 24°C (76°F) throughout these early months suggests a soothing consistency in Arecibo's climate, making it an inviting escape for those seeking warmth and outdoor adventure as winter wanes.
In January, Arecibo, Puerto Rico experiences a relatively mild start to the year with 41 mm (1.6 in) of precipitation spread over 11 days. This marks a gradual build-up towards the wetter months ahead, as rainfall begins to increase sharply in the following months. Notably, February sees a slight uptick, with 47 mm (1.8 in) recorded over 13 days, hinting at the transition into the rainy season. As the months progress toward June and July, Arecibo often faces heavier downpours, culminating in an average of 205 mm (8.1 in) in September. The early months, while still on the drier side, effectively set the stage for the more intense rainfall that characterizes the late summer and fall, showcasing a clear trend of increasing precipitation as winter gives way to spring and summer.
In January, Arecibo, Puerto Rico experiences a humidity level of 76%, setting the stage for the year with a warm and moist ambiance. As the months progress into February and March, humidity slightly decreases, hitting a low of 74% in March before stabilizing around 75% from April to May. The summer months bring a notable uptick, with July and August peaking at 80%, highlighting the tropical climate's intensity. As the year draws to a close, humidity begins to level off again, returning to 76% in December, suggesting a subtle cyclical pattern. Overall, Arecibo's humidity trends reflect the region's characteristic warmth, fluctuating gently throughout the year while consistently maintaining a rich, tropical feel.
In January, Arecibo, Puerto Rico, experiences a UV Index of 9, categorized as very high, indicating a burn time of just 15 minutes under direct sunlight. This sets the stage for a trend that intensifies as the year progresses. By February, the UV Index leaps to 11, entering the extreme category with a reduced burn time of 10 minutes. This pattern continues through the spring and summer months, peaking at a staggering 14 in May before gradually descending back to 9 in November and 8 in December. The consistent rise in UV levels, especially from late winter to mid-summer, underscores the importance of sun protection during these months. For more detailed insights on UV exposure throughout the year, check out the information available at Arecibo UV Index.
UV Risk Categories
In Arecibo, Puerto Rico, January offers a delightful start to the year with 259 hours of sunshine, laying the groundwork for a month that gradually receives more rays. As winter transitions into spring, sunshine hours steadily increase, peaking in May with an impressive 359 hours. This trend of brightening days continues into the summer, maintaining a high average before slightly tapering off in the fall. Notably, both September and October hold steady at 314 hours, signaling a harmonious balance as Arecibo welcomes the cooler months. As the year wraps up, December presents a festive finish with 319 hours of sunny delight, reinforcing the island's reputation as a year-round sun-soaked paradise.
In Arecibo, Puerto Rico, January boasts a 52% chance of sunny weather, marking it as a time to enjoy the warm Caribbean sun, albeit with a touch of uncertainty. As the year progresses into February, the likelihood of sunshine skyrockets to 75%, making it the sunniest month in this stretch. Following that, March maintains a robust 64%, while April sees a slight dip to 49%, hinting at the variability as the dry season transitions. Notably, May experiences a 53% chance of sunny days, illustrating that the allure of sunshine persists as spring meets summer. However, a decline begins to unfold in the summer months, with June plummeting to 29% and both July and August hovering around 45%. Fortunately, the chances improve again in the latter months, with November at 62% and December at 66%, wrapping up the year on a brighter note. This trend underscores the dynamic weather patterns in Arecibo, where sun-seekers can expect a blend of sunny spells and overcast skies throughout January and beyond.
In Arecibo, Puerto Rico, January marks the beginning of a steady daylight duration that remains consistent at 11 hours throughout the early months of the year. As spring approaches in March, daylight begins to extend to 12 hours, continuing through April and May, allowing residents and visitors alike to enjoy more sunshine and vibrant outdoor activities. The longest days occur in June and July, with an impressive 13 hours of daylight, perfect for basking in the tropical sun. As summer wanes towards August and September, daylight gradually returns to 12 hours, before descending back to 11 hours as the year draws to a close in October, November, and December. This rhythmic change not only enhances the beauty of Arecibo's landscape but also establishes a predictable pattern that locals cherish throughout the year.
In Arecibo, Puerto Rico, January ushers in a gentle breeze with an average wind speed of 4.3 m/s (10 mph), setting a tranquil tone for the month. As the year progresses, wind speeds tend to rise in February, peaking at 5.2 m/s (12 mph), only to slightly dip again by April. The summer months bring a consistent blow, with July and June both holding steady at around 5.1 m/s (11 mph), perfect for those seeking outdoor adventures. As the year winds down, the breezes mellow out, culminating in a calm December at 4.6 m/s (10 mph). Overall, the trends reveal a dynamic yet soothing wind pattern throughout the year, with the January winds symbolizing a refreshing start to Arecibo's climatic rhythm.
Weather in Arecibo varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Arecibo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, temperatures in Arecibo range from a minimum of 18°C (65°F) to a maximum of 29°C (84°F), with an average of 24°C (76°F). The month sees about 41 mm (1.6 in) of precipitation over 11 days, while humidity remains relatively high at 76%. In contrast, February experiences slightly warmer conditions, with minimum temperatures rising to 20°C (68°F) and maximums reaching 30°C (86°F), maintaining the same average of 24°C (76°F). Precipitation increases to 47 mm (1.8 in) across a total of 13 days, accompanied by a marginally lower humidity level of 75%. For a more detailed overview of February weather, check out Arecibo weather in February.
In January, Arecibo experiences warm temperatures with a minimum of 18°C (65°F) and a maximum of 29°C (84°F), accompanied by an average temperature of 24°C (76°F). The humidity is relatively high at 76%, with a total precipitation of 41 mm (1.6 in) falling over 11 days. In contrast, March sees a slight increase in temperatures, with a minimum of 20°C (68°F) and a maximum of 30°C (86°F), while the average remains the same at 24°C (76°F). However, March is wetter, receiving 87 mm (3.4 in) of rainfall over 16 days and a slightly lower humidity of 74%. For a more detailed look at the weather in Arecibo during this month, you can visit Arecibo weather in March.
In January, the weather features mild temperatures with a minimum of 18°C (65°F) and an average of 24°C (76°F), peaking at 29°C (84°F). The month sees about 41 mm (1.6 in) of precipitation over 11 days, coupled with high humidity at 76%. In contrast, April experiences slightly warmer conditions, with minimum temperatures of 20°C (69°F), an average of 25°C (77°F), and maximums reaching 30°C (87°F). However, April is also wetter, receiving 79 mm (3.1 in) of rain over 13 days and maintaining a similar humidity level at 75%. To learn more about the specifics of April weather, you can check Arecibo weather in April.
In January, the weather tends to be warm and moderately humid, with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 29°C (84°F) and an average of 24°C (76°F). The month experiences 41 mm (1.6 in) of precipitation over about 11 days. In contrast, May is even warmer, with minimum temperatures of 22°C (73°F) and a maximum of 32°C (91°F), averaging 26°C (79°F). However, it also sees increased rainfall, with 98 mm (3.9 in) of precipitation spread across 16 days, while humidity remains relatively stable at 75%. For more specific details about the weather in May, you can check this link: Arecibo weather in May.
In January, the weather in Arecibo is generally comfortable with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 29°C (84°F), averaging around 24°C (76°F). The month experiences 41 mm (1.6 in) of precipitation over 11 days, coupled with a humidity level of 76%. In contrast, June brings warmer temperatures, with a minimum of 23°C (74°F) and a maximum of 32°C (89°F), averaging 27°C (80°F). Additionally, June is noticeably wetter, receiving 90 mm (3.5 in) of rainfall over 14 days, while humidity remains similar at 77%. For more details, check out Arecibo weather in June.
In comparison, January experiences milder temperatures with a minimum of 18°C (65°F) and an average of 24°C (76°F), peaking at 29°C (84°F). Precipitation is lower, totaling 41 mm (1.6 in) across 11 days, and humidity averages around 76%. In contrast, July brings warmer weather with minimum temperatures of 24°C (75°F) and an average of 27°C (81°F), reaching up to 32°C (90°F). The month is also wetter, with precipitation of 91 mm (3.6 in) over 16 days, combined with slightly higher humidity at 80%. For more details about the weather in July, you can visit Arecibo weather in July.
In January, the weather in Arecibo is generally mild, with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 29°C (84°F) and a total precipitation of 41 mm (1.6 in) over 11 days. The humidity levels are also relatively high at 76%. In contrast, August brings warmer weather, with temperatures starting at a minimum of 24°C (75°F) and peaking at 32°C (90°F). It also sees significantly more rainfall, totaling 104 mm (4.1 in) across 19 days, and slightly higher humidity at 80%. For more detailed insights, you can visit Arecibo weather in August.
In January, the weather is noticeably milder, with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 29°C (84°F) and an average of 24°C (76°F). The month sees relatively low precipitation of 41 mm (1.6 in) over about 11 days, contributing to a humidity level of 76%. In contrast, September experiences warmer temperatures, with a minimum of 24°C (75°F), an average of 27°C (81°F), and a maximum of 32°C (90°F). This month is also considerably wetter, with precipitation soaring to 205 mm (8.1 in) across 23 days, resulting in a slightly higher humidity of 79%. For more detailed information on September weather, you can check Arecibo weather in September.
When comparing the weather between January and October, notable differences emerge. In January, temperatures range from a mild 18°C (65°F) at night to a pleasant average of 24°C (76°F), peaking at 29°C (84°F). The month sees relatively low precipitation, with just 41 mm (1.6 in) falling over an average of 11 days, and humidity sits at 76%. In contrast, October experiences warmer temperatures, with minimums of 23°C (74°F), an average of 27°C (80°F), and maximums reaching 31°C (89°F). However, October is much wetter, receiving 161 mm (6.4 in) of rain over 23 days and slightly higher humidity at 78%. For a closer look at October weather in Arecibo, you can visit Arecibo weather in October.
In January, the weather features milder temperatures with a minimum of 18°C (65°F) and an average of 24°C (76°F), peaking at 29°C (84°F). The month experiences relatively low rainfall, totaling 41 mm (1.6 in) over about 11 days, accompanied by a humidity level of 76%. In contrast, November is noticeably warmer, with minimum temperatures of 22°C (72°F), an average of 26°C (79°F), and maximums reaching 31°C (88°F). However, it sees significantly higher precipitation, with 109 mm (4.3 in) over 18 days and a slightly higher humidity of 78%. For more detailed weather insights, you can visit Arecibo weather in November.
In January, Arecibo experiences slightly cooler temperatures compared to December, with a minimum of 18°C (65°F) and a maximum of 29°C (84°F), while December sees minimums of 21°C (71°F) and maximums reaching 31°C (88°F). Both months have high humidity levels of 76%, but January has less precipitation at 41 mm (1.6 in) over 11 days, compared to December's 45 mm (1.8 in) over 15 days. For more detailed insights on the weather, you can check Arecibo weather in December.
In January, Arecibo experiences a blend of mild temperatures and significant humidity, setting it apart from the warmer months that follow. With a maximum temperature reaching 29°C (84°F) and an average of 24°C (76°F), January offers a comfortable climate for outdoor activities. However, the 41 mm of precipitation over 11 days indicates that showers are common, contributing to the lush landscapes. Unlike the sweltering summer months, the cool breezes and lower temperatures make January a delightful time to visit this vibrant locale. For more insights on the weather throughout the year, explore Arecibo Climate.