Last updated: August 27, 2025
Experience the January weather in San Juan, Philippines, characterized by warm temperatures and a touch of tropical humidity. With a maximum of 31°C (88°F) and an average of 26°C (78°F), the climate invites outdoor activities and exploration. The minimum temperature dips to a comfortable 20°C (68°F), perfect for evenings by the beach. While January sees a modest precipitation amount of 29 mm (1.1 in) over just 3 days, the air's 77% humidity adds to the rich, vibrant atmosphere of the region. Embrace the dynamic weather and all it offers during this lively month!
In January, San Juan, Philippines, experiences warm and pleasant temperatures, with a minimum of 20°C (68°F) and an average of 26°C (78°F), peaking at 31°C (88°F). This month marks a slight transition into the warmer season, as temperatures gradually rise, showcasing a pattern that continues into February where the minimum dips just slightly to 19°C (66°F), while the averages remain stable. As the months progress into March and April, warmth intensifies, with average temperatures reaching 27°C (81°F) and 28°C (82°F) respectively, before settling comfortably around 28°C (83°F) to 32°C (90°F) in May and June. Interestingly, July through September maintain a consistent warmth, barely fluctuating in maximum temperatures, usually capping at 31°C (88°F), while the average stays steady around 27°C (81°F). This trend of warm and stable conditions persists into the latter months, with November and December echoing the warmth felt in January. Overall, January serves as a gateway to the sun-kissed months ahead, making it an ideal time to savor the tropical climate of San Juan.
In January, San Juan experiences mild precipitation with 29 mm (approximately 1.1 in), arriving over just three days. This relatively light rainfall sets the tone for the dry beginnings of the year, contrasting sharply with the heavy downpours that follow in the coming months. As winter transitions to spring, February and March see further decreases in precipitation, with amounts dropping to 16 mm and 11 mm respectively. However, the onset of May marks a significant turnaround, signaling the start of the wet season, culminating in a staggering 609 mm (24.0 in) by August, where rainfall reaches its peak. The trend showcases a clear shift from dry beginnings to a lush monsoon peak, demonstrating the region's dynamic climate as it moves towards the wetter months.
In January, San Juan, Philippines experiences a noticeable humidity level of 77%, setting the stage for the year with a relatively comfortable atmosphere. As the months progress into February and March, humidity slightly dips to 73% and 71%, respectively, allowing for a brief respite. However, the weather takes a turn in the following months, with humidity rebounding to 77% in May before soaring during the rainy season. From June to September, the humidity climbs steadily, peaking at an impressive 87% in both August and September. This trend continues into the latter part of the year, where November sees a further increase to 89%, marking it as one of the most humid months. Overall, the humidity in San Juan shifts from manageable to intensely moist as the year unfolds, reflecting the tropical climate's impact on daily life.
In January, the UV Index in San Juan, Philippines, registers a noteworthy 10, classifying it as very high with a burn time of just 15 minutes. This level of exposure serves as an early precursor to the increasingly intense UV rays that follow in the subsequent months. As we transition into February, the UV Index escalates to 12, reaching extreme levels, and the recommended burn time drops to 10 minutes, a trend that persists through to March, April, and May, where the UV Index peaks at 14. This extreme category continues into the warm summer months, resulting in consistently short burn times. By the time we reach October, there's a slight reprieve as the UV Index dips to 13, followed by a return to very high levels in November and December. Overall, the data illustrates a clear progression of rising UV exposure from January through the mid-year, with a significant decline towards the end of the year. To better prepare for these intense conditions, check out the comprehensive details at San Juan UV Index.
UV Risk Categories
January in San Juan, Philippines, kicks off the year with 240 hours of sunshine, setting a bright tone for the months to follow. As temperatures rise, the days grow longer; February sees an increase to 275 hours, while March shines even brighter with 316 hours. This peak in sunlight marks the transition into the dry season, where April and May maintain high levels of sunshine at 313 and 320 hours, respectively. However, as summer progresses into June, sunshine hours decline to 285. The pattern continues through the rest of the year, with a gradual decrease in sunlight as the rainy season approaches, peaking in October at 282 hours before November and December maintain slightly lower levels at 272 and 283 hours. Overall, the trend reveals a vibrant start to the year, filled with abundant sunshine, followed by a gentle tapering into the cooler months.
In January, the likelihood of sunny weather in San Juan, Philippines, is a moderate 55%, mirroring the chances found in February. As the year progresses, the sun becomes increasingly prominent, peaking at 67% in March. The sunny disposition continues through April and May, with chances remaining high at 66% and 64%, respectively. However, as the rainy season approaches in June, the chances plummet to a mere 16%, reflecting a stark contrast to the earlier months. Overall, January is a great time to enjoy relative sunshine before the wet monsoon months set in, making it a prime opportunity for those seeking enjoyable outdoor experiences.
In San Juan, Philippines, January marks the start of a consistent daylight pattern, offering about 11 hours of sunlight each day. This duration remains stable through February, creating a seamless transition into the early months of the year. As spring approaches in March, daylight naturally begins to increase, reaching 12 hours and sustaining that longer light period through May. The peak of daylight shines during the summer months of June and July, where residents enjoy an extended 13 hours of bright skies. As the year progresses into August and September, daylight hours gradually taper back to 12 hours, followed by a return to 11 hours from October through December. This rhythmic fluctuation not only beautifies the landscape but also highlights the tropical charm of San Juan throughout the changing seasons.
In January, the winds in San Juan, Philippines are at their peak, averaging 5.1 m/s (12 mph), making it the windiest month of the year. As the calendar turns to February, wind speeds noticeably drop to 3.4 m/s (8 mph), continuing a gradual decline through March and May, where they hit a low of 2.0 m/s (4 mph). However, the arrival of June brings a refreshing uptick, with winds blowing at 3.6 m/s (8 mph), a trend that continues into the summer months of July and August. As the year progresses into the cooler months, winds pick up slightly again, with October and November recording speeds of 3.1 m/s (7 mph) and 3.2 m/s (7 mph). By the time December arrives, the winds begin to pick up strength once more at 4.9 m/s (11 mph), setting the stage for a breezy start to the new year. Overall, January stands out not just for its wind intensity, but also as a harbinger of fluctuating yet dynamic seasonal patterns throughout the year.
Weather in San Juan varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in San Juan, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in January and February, January experiences slightly warmer temperatures with an average of 26°C (78°F), compared to February's 25°C (77°F). Both months see maximum temperatures reaching up to 31°C (88°F), but January has a higher minimum temperature of 20°C (68°F), while February's minimum drops to 19°C (66°F). Precipitation is also reduced in February, with only 16 mm (0.6 in) spread over 2 days, in contrast to January's 29 mm (1.1 in) over 3 days. Additionally, February has a lower humidity level at 73%, compared to January's 77%. For more details, visit San Juan weather in February.
In January, the weather is warm with minimum temperatures around 20°C (68°F) and an average of 26°C (78°F), reaching a maximum of 31°C (88°F). This month experiences a moderate amount of precipitation, totaling 29 mm (1.1 in) over 3 days, along with relatively high humidity at 77%. In contrast, March sees slightly higher temperatures, with a minimum of 21°C (70°F) and an average of 27°C (81°F), peaking at 32°C (91°F). Precipitation is lower in March at just 11 mm (0.4 in) over 2 days, and humidity decreases to 71%. For more detailed information, check San Juan weather in March.
In January, the weather features a minimum temperature of 20°C (68°F) and averages around 26°C (78°F), peaking at 31°C (88°F), accompanied by relatively high humidity at 77%. The month sees light rainfall, with a total precipitation of 29 mm (1.1 in) spread over just 3 days. In contrast, April experiences slightly warmer conditions, with a minimum of 22°C (71°F) and an average of 28°C (82°F), reaching a maximum of 32°C (90°F). Despite the warmer temperatures, April has a marginally lower humidity level at 73% and similar total precipitation of 28 mm (1.1 in), albeit over 6 days. For more details, you can check San Juan weather in April.
January and May present markedly different weather conditions. In January, temperatures range from a minimum of 20°C (68°F) to a maximum of 31°C (88°F), with an average of 26°C (78°F). The month experiences relatively low precipitation at 29 mm (1.1 in) over just 3 days and maintains a consistent humidity of 77%. In contrast, May sees warmer temperatures, with a minimum of 24°C (76°F), an average of 28°C (83°F), and a maximum of 32°C (89°F). However, it also brings significantly more rainfall, totaling 157 mm (6.2 in) over 23 days while continuing with the same humidity level of 77%. For more specific insights on the weather during this month, you can refer to San Juan weather in May.
In January, the weather features a comfortable range of temperatures, with a minimum of 20°C (68°F), an average of 26°C (78°F), and a maximum of 31°C (88°F). Precipitation is relatively low, at 29 mm (1.1 in) over just three days, and humidity hovers around 77%.
In contrast, June experiences warmer temperatures, starting with a minimum of 24°C (76°F), an average of 28°C (82°F), and peaking at 32°C (90°F). However, this month brings significantly higher rainfall, with 369 mm (14.5 in) falling over 28 days, leading to increased humidity levels of 85%.
For more detailed information, check San Juan weather in June.
In January, the weather is generally warm with average temperatures ranging from a minimum of 20°C (68°F) to a maximum of 31°C (88°F), while humidity levels hover around 77%. Precipitation during this month is relatively low, with only 29 mm (1.1 in) of rain falling over three days. In contrast, July sees a significant increase in rainfall, with 533 mm (21.0 in) spread over 29 days, leading to much higher humidity levels of 86%. Despite the more consistent rain, the temperature remains quite steady, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (88°F). For a detailed look at the weather patterns in July, you can refer to San Juan weather in July.
The weather in January and August presents a striking contrast, particularly in terms of precipitation. In January, temperatures range from a minimum of 20°C (68°F) to a maximum of 31°C (88°F) with an average of 26°C (78°F), and the month experiences only 29 mm (1.1 in) of rainfall over three days, accompanied by humidity levels around 77%. In contrast, August is hotter with minimum temperatures of 24°C (75°F) and a maximum of 31°C (87°F), averaging 27°C (80°F). However, it is significantly wetter, receiving a staggering 609 mm (24.0 in) of rainfall across 29 days, and humidity rises to 87%. For more details on August weather, visit San Juan weather in August.
January and September exhibit notable differences in weather patterns. In January, temperatures range from a minimum of 20°C (68°F) to a maximum of 31°C (88°F), with an average of 26°C (78°F). This month experiences relatively low precipitation of 29 mm (1.1 in) spread over just 3 days, combined with a humidity level of 77%. Conversely, September presents warmer conditions with minimum temperatures reaching 23°C (74°F) and maximums up to 32°C (89°F), averaging 27°C (81°F). However, it is also characterized by significantly higher rainfall, totaling 343 mm (13.5 in) over 26 days and a humidity level of 87%. For more detailed information on weather conditions during this month, you can check San Juan weather in September.
In comparing the weather of January and October, it becomes evident that October tends to be warmer and much wetter. In January, temperatures range from a minimum of 20°C (68°F) to a maximum of 31°C (88°F), with an average temperature of 26°C (78°F) and only 29 mm (1.1 in) of rainfall over about three days. In contrast, October features slightly higher temperatures, with a minimum of 22°C (71°F), an average of 27°C (81°F), and a maximum of 32°C (89°F). However, it also brings significant rainfall, totaling 165 mm (6.5 in) spread over 14 days, along with increased humidity at 86%. For those interested in exploring more about October weather, check out San Juan weather in October.
In January, the weather is generally warm, with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 31°C (88°F) and an average of 26°C (78°F). Precipitation is minimal at 29 mm (1.1 in), occurring over just 3 days, and humidity sits at 77%.
In contrast, November experiences slightly warmer temperatures with a minimum of 22°C (71°F) and a maximum of 32°C (90°F), averaging around 27°C (81°F). November also sees significantly more rainfall, totaling 71 mm (2.8 in) over 8 days, along with higher humidity at 89%. For more details, you can check the San Juan weather in November.
In January, the weather remains warm with an average temperature of 26°C (78°F), similar to December, but slightly cooler at its minimum of 20°C (68°F). Precipitation is slightly higher in December with 27 mm compared to January's 29 mm, although the number of rainy days is greater in December with five days versus just three in January. Humidity levels also rise from 77% in January to 85% in December, indicating a more humid atmosphere. For a more detailed look at the weather in December, you can visit San Juan weather in December.
January in San Juan offers a delightful respite from the sweltering heat of the summer months, showcasing a pleasant blend of warm temperatures and moderate humidity. With an average temperature of around 26°C (78°F), days in January are comfortably warm, while nights cool down to a refreshing 20°C (68°F). Precipitation is limited, with only a few days experiencing light rain, making it an ideal time for outdoor activities. Compared to other months, January's weather is notably more accommodating, setting the stage for enjoying the vibrant local culture and stunning landscapes. For a deeper dive into the yearly climate trends, check out San Juan Climate.