Last updated: August 31, 2025
In January, Guanica, Puerto Rico offers a delightful tropical experience with maximum temperatures reaching 29°C (84°F) and an average of 25°C (77°F), making it an ideal month for outdoor adventures. The evenings cool down to a comfortable minimum of 19°C (67°F), ensuring cozy nights under the stars. While January sees a modest precipitation total of 18 mm (0.7 in) over just four days, the overall humidity sits at a humid 76%, adding to the lush, vibrant atmosphere of this coastal gem. Whether you're exploring its natural beauty or relaxing by the beach, January is a fantastic time to savor the charm of Guanica.
In Guanica, Puerto Rico, January sets the tone for the year with its mild and pleasant temperatures. The month begins with a minimum of 19°C (67°F), gradually rising to an average of 25°C (77°F) and peaking at a comfortable 29°C (84°F). This aligns with a general trend of relatively stable temperatures throughout the winter months, with February and March showing only slight increases in minimum and maximums. As the year progresses into spring, temperatures tend to rise a bit more, particularly in May, where you can expect to experience warm afternoons around 30°C (86°F). Overall, January offers a refreshing start, inviting visitors to enjoy the charm of Puerto Rico's tropical climate, setting the stage for warmer months ahead.
In Guanica, Puerto Rico, January marks the start of the year with relatively low precipitation, averaging just 18 mm (0.7 in) over four days. This gentle beginning sets the tone for the month, as rainfall gradually increases in the subsequent months. By February, precipitation climbs to 26 mm, and the trend continues, reaching a peak of 159 mm in September, the wettest month. This seasonal shift highlights a clear pattern—January's mild conditions pave the way for the wetter days ahead, particularly during the summer and early fall, when rainfall is more frequent and abundant. Thus, the January weather serves as a calm prelude to Guanica's vibrant and rain-soaked autumn months.
In January, Guanica, Puerto Rico experiences a humidity level of 76%, setting a trend for the early months of the year where comfort prevails. As winter transitions into spring, humidity remains relatively stable, dipping slightly to 75% in both February and March. By April, humidity climbs back to 76%, maintaining a pleasant atmosphere as the region gears up for the warmer months ahead. As summer arrives with June's 78%, we see humidity consistently rise, peaking at 81% in July and settling around 79% in September. The trend showcases the tropical essence of Guanica, where humidity levels remain fairly high throughout the year, only dipping slightly during the cooler months, reflecting the region's lush, vibrant ecology.
In Guanica, Puerto Rico, January brings a UV Index of 9, categorized as very high, indicating that sun exposure requires caution, with a burn time of only 15 minutes. As the months transition from January to March, the UV Index surges dramatically, peaking at 14 in May, marking a period of extreme exposure and a markedly reduced burn time of just 10 minutes. This extreme UV intensity persists into the summer months, where values remain consistently high through September. Interestingly, by November, the index gently recedes back to 9, resembling January's levels, while December sees it further decline to 8. As such, it’s vital for residents and visitors to stay informed and protect their skin, especially during these higher months. For a closer look at the UV Index throughout the year, visit Guanica UV Index.
UV Risk Categories
Guanica, Puerto Rico, greets the year with a modest but inviting 262 hours of sunshine in January, setting the stage for an upward trend as winter gives way to spring. As February ushers in 308 hours, the days grow longer and brighter, paving the way for March's warm embrace of 348 hours. The sunshine continues to peak in April and May, where residents and visitors can bask in a radiant 353 hours and 363 hours, respectively. This sun-kissed momentum carries through the summer months, with July hitting 361 hours and August maintaining a cheerful 353 hours. As the year progresses into fall, sunshine hours begin to soften, with September at 318 hours and October slightly trailing at 317 hours. The year wraps up with a cozy 299 hours in November and a bright 320 hours in December, painting a picture of consistent warmth and radiant beauty throughout the year.
In Guanica, Puerto Rico, January ushers in a relatively moderate 54% chance of sunny weather, marking the beginning of the year with a pleasant touch of sunlight. As winter gives way to spring, February shows a significant increase, soaring to 79%, making it the sunniest month of the early year. March follows closely with a strong 68%, indicating a consistent trend of sunshine that peaks before transitioning into the wetter months. Interestingly, April dips slightly to 49%, hinting at the rainy season's approach. As the months progress towards summer, the likelihood of sunny days fluctuates, with June hitting the lowest point at 32%. Overall, while January's sunshine is commendable, the ensuing months provide even more enticing opportunities for basking in the warm Caribbean sun.
In Guanica, Puerto Rico, January offers a steady 11 hours of daylight, a trend that continues through February. As the year progresses into March, daylight begins to extend gradually, reaching 12 hours and maintaining this duration through May. The peak of daylight occurs in the summer months of June and July, when residents enjoy an impressive 13 hours of sunshine. However, as August returns to a more moderate 12 hours, the days start to shorten again in September. By October, November, and December, daylight dips back down to 11 hours, completing a rhythmic cycle of light that reflects the island's tropical charm. This variation highlights the balance between the abundance of daylight in summer and the cozy, shorter days of winter, making Guanica a delightful destination year-round.
In Guanica, Puerto Rico, January brings a gentle average wind speed of 3.9 m/s (9 mph), setting a serene tone for the beginning of the year. This tranquil breeze is a precursor to the increased gusts that follow in February, where the wind picks up to 5.5 m/s (12 mph), marking the month's peak. As the seasons transition from winter to spring, the wind speed stabilizes around similar levels, averaging 4.2 m/s in March and dipping back to January's gentle pace by April. The warmer months of May and June witness a slight uptick, with speeds reaching around 4.4 to 4.8 m/s, before July hits its stride with a robust 5.1 m/s (12 mph). However, as summer fades into fall, the winds soften again, culminating in September's lowest average of 3.1 m/s (7 mph). This ebb and flow of wind not only characterizes the island’s weather patterns but also enhances the captivating beauty of Guanica’s coastal landscape throughout the year.
Weather in Guanica varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Guanica, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, the weather typically features a minimum temperature of 19°C (67°F) and a maximum of 29°C (84°F), with an average temperature of 25°C (77°F). This month experiences a total precipitation of 18 mm (0.7 in) over about 4 days, accompanied by a humidity level of 76%.
In comparison, February sees a slight increase in the minimum temperature to 21°C (70°F), while the maximum temperature remains similar at 29°C (85°F), maintaining an average of 25°C (77°F). However, February also brings about increased precipitation with 26 mm (1.0 in) over 5 days and a marginally lower humidity level of 75%.
For more detailed insights, you can check the Guanica weather in February.
In comparing the weather between January and March, January tends to be slightly warmer, with average temperatures ranging from a minimum of 19°C (67°F) to a maximum of 29°C (84°F). In contrast, March sees a slightly higher minimum temperature of 21°C (69°F) but a lower maximum of 28°C (83°F), resulting in a cooler average of 24°C (76°F). While January has minimal precipitation at 18 mm (0.7 in) over just 4 days, March experiences significantly more rainfall, totaling 49 mm (1.9 in) across 11 days. Despite the increase in precipitation, humidity remains relatively stable between the two months, with January at 76% and March at 75%. For more detailed information, you can check Guanica weather in March.
In January, temperatures in Guanica range from a minimum of 19°C (67°F) to a maximum of 29°C (84°F), with an average of 25°C (77°F). The month sees relatively low precipitation of 18 mm (0.7 in) over just 4 days, accompanied by a humidity level of 76%. In contrast, April experiences slightly warmer temperatures with a minimum of 21°C (70°F) while maintaining the same average and maximum as January. However, April is notably wetter, with precipitation totaling 49 mm (1.9 in) spread over 14 days, while humidity remains consistent at 76%. For more detailed insights, you can check Guanica weather in April.
In January, the weather is pleasantly warm with an average temperature of 25°C (77°F), peaking at a maximum of 29°C (84°F). There is relatively low precipitation, with only 18 mm (0.7 in) falling over four days, while humidity hovers around 76%. In contrast, May brings slightly warmer conditions, with an average temperature of 26°C (79°F) and maximums reaching 30°C (86°F). However, this month sees a significant increase in rainfall, totaling 59 mm (2.3 in) over twelve days, although humidity remains constant at 76%. For a closer look at May weather specifics, you can check Guanica weather in May.
In comparing the weather between January and June, January tends to be slightly cooler, with average temperatures ranging from a minimum of 19°C (67°F) to a maximum of 29°C (84°F). It experiences lower precipitation levels, receiving about 18 mm (0.7 in) over just 4 days, while maintaining a humidity level of 76%. Conversely, June is warmer, with temperatures ranging from a minimum of 23°C (75°F) to a maximum of 31°C (88°F). It also sees significantly more rainfall, totaling 53 mm (2.1 in) across 12 days, accompanied by a marginally higher humidity of 78%. For more detailed insights, check out Guanica weather in June.
In January, the weather is characterized by milder temperatures, with average highs around 29°C (84°F) and relatively low humidity at 76%. Precipitation is minimal, averaging only 18 mm (0.7 in) over about four days, making it a drier month compared to July. In contrast, July experiences warmer temperatures, with average highs reaching 31°C (88°F) and increased humidity at 81%. This month also sees significantly more rainfall, totaling 86 mm (3.4 in) over approximately 16 days. For a detailed look at July weather specifics, visit Guanica weather in July.
January and August exhibit notable differences in weather patterns. January presents a milder climate with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 29°C (84°F), accompanied by relatively low precipitation of 18 mm (0.7 in) over just 4 days. In contrast, August experiences warmer temperatures, starting at a minimum of 23°C (74°F) and reaching up to 32°C (90°F). This month also sees significantly higher precipitation levels, totaling 96 mm (3.8 in) spread over 16 days, and slightly increased humidity at 80%. For more specific details, you can check out Guanica weather in August.
January and September present contrasting weather patterns. In January, temperatures range from a minimum of 19°C (67°F) to a maximum of 29°C (84°F), with an average of 25°C (77°F). The month experiences relatively low precipitation, totaling 18 mm (0.7 in) over just 4 days, and humidity averages around 76%. In contrast, September is warmer, with minimum temperatures of 24°C (76°F) and maximums reaching 32°C (90°F), resulting in an average of 27°C (81°F). This month is notably wetter, receiving 159 mm (6.2 in) of rainfall over 21 days and slightly higher humidity at 79%. For a more detailed look at the weather in this month, check Guanica weather in September.
In comparing the weather between January and October, January tends to be slightly cooler with average temperatures ranging from a minimum of 19°C (67°F) to a maximum of 29°C (84°F). The month typically experiences less precipitation, with only 18 mm (0.7 in) falling over about 4 days, along with a humidity level of 76%. In contrast, October is warmer, featuring a minimum temperature of 24°C (75°F) and reaching an average maximum of 31°C (88°F). However, it also sees significantly higher rainfall at 102 mm (4.0 in) spread over 20 days, with humidity slightly increasing to 78%. For a detailed look at October's weather, check out Guanica weather in October.
In January, the weather is generally milder with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 29°C (84°F), while the average temperature hovers around 25°C (77°F). Precipitation is relatively low, with only 18 mm (0.7 in) falling over about 4 days, and the humidity is at 76%. In contrast, November experiences warmer conditions, with temperatures starting at 23°C (73°F) and peaking at 31°C (88°F), averaging 26°C (79°F). However, November is significantly wetter, receiving 91 mm (3.6 in) of rain spread over 15 days, along with slightly higher humidity levels at 78%. For more detailed insights on the weather in November, check out Guanica weather in November.
In January, temperatures in Guanica range from a minimum of 19°C (67°F) to a maximum of 29°C (84°F), with an average of 25°C (77°F). The month sees less precipitation, totaling 18 mm (0.7 in) over about 4 days, and humidity is relatively high at 76%. In contrast, December features slightly warmer temperatures, with a minimum of 22°C (72°F) and a maximum of 30°C (86°F), averaging 26°C (78°F). This month experiences more rainfall, accumulating 25 mm (1.0 in) across 7 days, while humidity remains nearly steady at 77%. For a detailed look at December's weather, you can check Guanica weather in December.
January in Guanica brings a delightful respite from the warmer months, offering a comfortable climate characterized by pleasant temperatures and manageable humidity. With daytime highs around 29°C and a refreshing average of 25°C, it’s an ideal time for outdoor activities. While you may encounter a few rainy days, with total precipitation of 18 mm, the majority of January remains sunny and inviting, allowing you to explore the stunning landscapes. As you revel in the cooler evening temperatures of around 19°C, you’ll find that January stands out as a charming month to visit. For a deeper understanding of what to expect throughout the year, check out the complete guide here: Guanica Climate.