Last updated: August 27, 2025
In January, San Martin, Peru experiences a tropical climate characterized by warm temperatures and high humidity. The maximum temperature can reach a sweltering 35°C (94°F), while the average hovers around a comfortable 26°C (78°F). The nights are mild, with a minimum temperature of 19°C (67°F). Despite the warmth, this month witnesses moderate precipitation, with 20 mm (0.8 in) of rainfall spread over approximately 4 days. The humidity remains relatively high at 89%, contributing to a lush, vibrant landscape that defines this picturesque region during the rainy season.
In January, San Martin, Peru basks in warm tropical conditions, with temperatures ranging from a comfortable 19°C (67°F) at night to a sizzling 35°C (94°F) during the day, averaging around 26°C (78°F). This month marks the beginning of the year with the promise of sunny days, as temperatures gradually rise and set the tone for the following months. Notably, the heat continues to build, peaking in March with maximums reaching 36°C (96°F), before settling into slightly cooler temperatures by April. As the dry season progresses into May and June, a discernible cooling trend emerges, bringing lower nightly temperatures down to 15°C (60°F) by July and August. Overall, January serves as a vibrant kickoff to a year of fluctuating temperatures, characterized by a shift from warm highs to more temperate averages as the seasons transition.
In January, San Martin, Peru experiences modest precipitation, with a total of 20 mm (0.8 in) falling across just 4 days. This sets the stage for a significantly wetter February, which sees a sharp increase to 65 mm (2.5 in), indicating the onset of the rainy season. As the months progress, precipitation peaks dramatically in March with 157 mm (6.2 in), reflecting the region's tendency towards heavier rainfall. Following this peak, April and May bring a noticeable decline in precipitation, with amounts dropping to 33 mm (1.3 in) and 13 mm (0.5 in), respectively. The trend continues into the winter months, where rainfall diminishes further, leading to dry conditions, particularly in August and September, which often see negligible precipitation. This seasonal shift highlights the stark contrast between the lush rains of early in the year and the parched months that follow.
In January, San Martin, Peru, experiences its peak humidity at a notable 89%, creating a lush, tropical ambiance that characterizes the region. This trend continues into February and March, where humidity remains consistently high at 87%, before easing slightly to 86% in April. An uptick to 89% in May signals a return to the earlier moisture levels, but then a gradual decline begins. By July and August, humidity drops significantly to 71%, indicating the dry season's arrival and offering a refreshing contrast to the earlier months. As the year progresses, humidity gradually increases, peaking again in December at 86%, hinting at the cyclical nature of San Martin's climate. Throughout the year, these fluctuations in humidity not only shape the region's vibrant ecosystem but also influence the local lifestyle and agriculture.
In January, San Martin, Peru, experiences a highly intense UV Index of 14, categorizing exposure as extreme—a cautionary signal for sun enthusiasts. With a blistering burn time of just 10 minutes, it’s essential to be proactive about skin protection during this month, as similar levels persist through February and March, peaking at 16. After this, the UV Index gradually declines but remains in the extreme category, showing resilience in intensity through much of the year with values consistently above 11. Being aware of these trends is vital for anyone enjoying outdoor activities. To prepare effectively for the sun, explore more at San Martin UV Index.
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January in San Martin, Peru, greets visitors with 271 hours of sunshine, a delightful prelude to the sun-soaked months ahead. As the landscape transitions into February, the sun shines more brightly, with hours increasing to 299. This upward trend continues through the following months, peaking in December at an impressive 338 hours. Notably, the mid-year months of May through August bask in particularly abundant sunlight, each boasting over 320 hours. This gradual increase not only highlights the region's warm and inviting climate but also underscores the compelling allure for travelers seeking to enjoy the vibrant beauty of San Martin throughout the year.
In January, San Martin, Peru, experiences a 30% chance of sunny weather, setting the tone for a month that skews slightly cloudy. This trend continues into February with a marginal increase to 31%, suggesting a gradual shift toward clearer skies. However, the likelihood dips again in March to 25%, making it one of the cloudier months. As the year progresses, brighter days become more frequent, peaking in May at an impressive 62%, while the summer months of July and August maintain a healthy 60% and 45%, respectively. Overall, while January might not boast the sunniest weather of the year, it marks the beginning of a gradual ascent towards sunnier days, proving that brighter skies are just around the corner.
In San Martin, Peru, the month of January offers a delightful 12 hours of daylight, continuing a trend that persists through February and March. As the seasons shift into April, daylight begins to decrease slightly, settling at 11 hours and remaining consistent through the cooler months of June, July, and August. This dip is brief, as September brings a renewal of 12 hours of daylight, maintaining that length through October and November. By December, daylight once again holds steady at 12 hours, creating a harmonious cycle that embraces both light and shadow throughout the year.
In January, San Martin, Peru experiences a gentle breeze with an average wind speed of 3.1 m/s (7 mph). This initial gust sets the stage for a month where the winds begin to pick up just slightly as the year progresses. By February and April, the winds strengthen to 3.3 m/s while maintaining a consistent pace, which hints at a gradual upward trend. However, March sees a dip to 2.5 m/s, reminding us that fluctuations are part of the charm. As the months roll into May through July, the winds stabilize at 3.5 m/s, adding a calm yet steady rhythm to the atmosphere. With the onset of August to October, an average of 3.7 m/s brings a refreshing vigor, suggesting that while January's winds are gentle, the later months embrace a more energetic breeze, creating a dynamic interplay that characterizes the region throughout the year.
Weather in San Martin varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in San Martin, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, the weather features a minimum temperature of 19°C (67°F) and an average of 26°C (78°F), with maximum temperatures reaching up to 35°C (94°F). The month sees relatively low precipitation of 20 mm (0.8 in) spread over 4 days, along with high humidity at 89%. In contrast, February experiences slightly warmer temperatures, with a minimum of 20°C (68°F) and an average of 27°C (80°F), while still peaking at 35°C (96°F). However, February is considerably wetter, receiving 65 mm (2.5 in) of rain across 9 days, and maintaining a humidity level of 87%. For further details, you can check out San Martin weather in February.
In comparison to January, March experiences slightly warmer temperatures with a minimum of 21°C (69°F) and an average of 27°C (80°F), while January's minimum is 19°C (67°F) with an average of 26°C (78°F). March also sees a higher maximum temperature of 36°C (96°F), compared to January's maximum of 35°C (94°F). However, March is significantly wetter, featuring 157 mm (6.2 in) of precipitation over 9 days, whereas January only receives 20 mm (0.8 in) across 4 days. Despite the increase in rainfall, humidity levels remain relatively similar, with January at 89% and March at 87%. For more detailed information about the weather in March, you can visit San Martin weather in March.
In January, the weather features a slightly higher average temperature of 26°C (78°F) compared to April's 25°C (78°F), with both months experiencing maximum temperatures that can reach up to 35°C (94°F in January and 95°F in April). January tends to be a bit more humid, with an average humidity of 89%, while April's humidity is slightly lower at 86%. Precipitation levels also increase in April, with 33 mm (1.3 in) of rain over 5 days compared to just 20 mm (0.8 in) over 4 days in January. For more detailed insights about April's weather, you can check out San Martin weather in April.
In January, temperatures in San Martin range from a minimum of 19°C (67°F) to a maximum of 35°C (94°F), with an average of 26°C (78°F). This month experiences slightly more rainfall, with a total of 20 mm (0.8 in) over four days, contributing to a consistently high humidity level of 89%. In contrast, May sees a decrease in temperature, with minimums around 16°C (62°F) and maximums reaching 33°C (91°F), resulting in a cooler average of 24°C (75°F). Precipitation in May is also lower, totaling 13 mm (0.5 in) over the same four days, yet humidity remains at 89%. For more details on weather conditions in May, you can visit San Martin weather in May.
January and June present contrasting weather patterns. In January, temperatures are warmer, with a minimum of 19°C (67°F) and highs reaching 35°C (94°F), while the average sits at 26°C (78°F). This month experiences relatively high humidity at 89% and moderate rainfall of 20 mm (0.8 in) over four days. In comparison, June sees cooler temperatures, with a minimum of 17°C (63°F) and a maximum of 31°C (88°F), averaging 22°C (72°F). Rainfall is significantly lower at 6 mm (0.2 in) over just two days, and humidity decreases slightly to 84%. For more details on the weather in June, you can refer to San Martin weather in June.
In January, the weather is considerably warmer, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 35°C (94°F) and an average of 26°C (78°F). The month experiences higher humidity levels at 89% and sees about 20 mm (0.8 in) of precipitation over four days. In contrast, July presents a cooler climate, with temperatures peaking at a maximum of 28°C (82°F) and averaging 21°C (70°F), while the minimum drops to 15°C (60°F). July is much drier, with only 4 mm (0.1 in) of rainfall over a single day and lower humidity at 71%. For more detailed information, check out San Martin weather in July.
In January, the weather is significantly warmer, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 35°C (94°F) and an average of 26°C (78°F). The month sees moderate humidity at 89% and experiences about 20 mm (0.8 in) of precipitation over four days. In contrast, August offers a cooler climate with temperatures between 15°C (59°F) and 28°C (83°F), averaging 20°C (69°F). This month boasts much lower humidity at 71% and minimal rainfall, with only 2 mm (0.1 in) recorded and no rainy days. For more details about the weather in August, you can visit San Martin weather in August.
In January, the weather is notably warmer, with average temperatures ranging from a minimum of 19°C (67°F) to a maximum of 35°C (94°F), and high humidity levels at 89%. The month also experiences some precipitation, totaling 20 mm over four days. In contrast, September features a cooler climate, with temperatures averaging from a low of 16°C (60°F) to a peak of 29°C (85°F), and significantly less rainfall, receiving only 3 mm with no rainy days. The humidity drops to a more comfortable 75%. For more detailed information, you can check San Martin weather in September.
In January, the weather is significantly warmer, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 35°C (94°F), accompanied by high humidity levels of 89%. The month experiences a bit more rainfall, with about 20 mm (0.8 in) of precipitation over four days. In contrast, October offers cooler temperatures, with a minimum of 16°C (61°F) and a maximum of 30°C (86°F), and lower humidity at 77%. Additionally, October sees less rainfall, totaling only 10 mm (0.4 in) over two days. For more detailed information, you can explore San Martin weather in October.
January weather is generally warmer than November, with average temperatures reaching 26°C (78°F) compared to November's 22°C (71°F). In January, the maximum temperature can soar to 35°C (94°F), while November's highest temperature is slightly lower at 31°C (88°F). Additionally, January experiences higher humidity levels at 89% versus November's 79%. Precipitation is also more frequent in January, with 20 mm (0.8 in) recorded over 4 days, compared to November’s 14 mm (0.6 in) over 3 days. For more detailed information, you can check San Martin weather in November.
In January, temperatures are slightly higher with a minimum of 19°C (67°F) and an average of 26°C (78°F), while December sees a minimum of 17°C (63°F) and an average of 24°C (75°F). The maximum temperatures also rise in January to 35°C (94°F), compared to December's 32°C (91°F). Precipitation is lower in January at 20 mm (0.8 in) over 4 days, whereas December experiences more rainfall at 29 mm (1.2 in) across 7 days. Humidity remains relatively high in both months, with January at 89% and December at 86%. For a more detailed look at weather patterns, check out San Martin weather in December.
January in San Martin showcases a warm and humid climate characterized by notable sunshine and occasional rainfall, making it distinct from the cooler months. With average temperatures hovering around a comfortable 26°C (78°F) and peak highs reaching 35°C (94°F), outdoor enthusiasts will find plenty of opportunities to enjoy nature. However, January's humidity at 89% coupled with light precipitation spread across just a few days can create a tropical feel, setting it apart from the dryer and cooler months that precede and follow it. For more insight into the year-round climate, explore San Martin Climate.