Last updated: August 21, 2025
January in Guarulhos, Brazil showcases a vibrant summer climate characterized by warm temperatures and considerable humidity. With maximums reaching 33°C (91°F) and an average of 23°C (74°F), the month offers plenty of warm days to enjoy. However, it also brings about frequent rain, with 192 mm (7.6 in) of precipitation spread over 19 days, leading to a lush, green environment. The average humidity level hovers around 88%, creating a tropical atmosphere that enhances the vibrant essence of this bustling city.
In January, Guarulhos, Brazil, experiences warm and inviting temperatures, with lows around 15°C (59°F) and a comfortable average of 23°C (74°F). The maximum temperatures can soar up to 33°C (91°F), making it one of the hottest months of the year. As the month unfolds, the heat begins to taper slightly by February, where the average drops to 22°C (73°F) while still hitting a peak of 34°C (93°F). This trend of gradually decreasing temperatures continues into March and April, with averages resting around 22°C (73°F) and 20°C (69°F), respectively. As the year progresses, Guarulhos transitions through cooler months, particularly from May to July, when temperatures plummet to a minimum of 2°C (35°F) in July, showcasing the city’s marked seasonal shift. By August, temperatures begin to rise again, hinting at the warmer months ahead, yet the delightful warmth of January remains a highlight, offering sunshine and vibrancy to those seeking a summer escape.
In January, Guarulhos experiences its wettest month of the year, with an impressive 192 mm (7.6 in) of precipitation falling over 19 days. This high rainfall signals the height of the rainy season, as subsequent months show a gradual decline in both precipitation volume and frequency of rainy days. For instance, February still sees significant rainfall at 166 mm (6.5 in) but with one less day of rain, while March dips further to 147 mm (5.8 in). The trend continues into the drier months, where rainfall drops dramatically to just 58 mm (2.3 in) in April and further to 29 mm (1.1 in) by July. Ultimately, January sets the stage for a wet summer, shaping the weather patterns for the months that follow.
In Guarulhos, Brazil, January marks the peak of humidity levels at a steamy 88%, reflecting the warm and tropical climate of this vibrant region. This high humidity persists into February, remaining steady at 88%, before gently tapering off in March to 87%. As the seasons transition into autumn, humidity decreases more noticeably, dropping to 84% in April and further to 79% in May. The trend toward lower humidity continues through the winter months, with July recording the lowest at 72%. As spring approaches, humidity begins to rise again, with November witnessing a slight uptick to 75% before closing the year with 80% in December. Overall, January's significant humidity sets the tone for a warm and moisture-laden start to the year, with a gradual ebbing trend that fosters comfortable conditions in the subsequent months.
In January, Guarulhos, Brazil, experiences an exceptionally high UV Index of 16, classified in the extreme exposure category, with a minimal burn time of just 10 minutes. This trend of extreme UV levels continues into February, slightly tapering off in March and April, yet maintaining a critical burn time of 10 minutes. As the year progresses, the UV Index declines gradually, reaching a notably lower 8 in May; however, it still remains in the very high category, allowing for a slightly longer burn time of 15 minutes. While June and July see the UV Index at 6 and 7, respectively, categorized as high, the exposure risk remains significant. By September, the intense UV conditions return with an 11, prompting caution once more. Throughout the latter part of the year, fluctuating indices reflect persistent extremes, particularly noted in the 14 in November and 15 in December, both necessitating attentive sun protection measures. For more detailed insights, visit Guarulhos UV Index.
UV Risk Categories
In Guarulhos, Brazil, January begins the year on a bright note, offering 251 hours of sunshine that sets a vibrant stage for the months to come. As the summer unfolds, February brings even more sunlight with 267 hours, gradually building anticipation for the longer days ahead. By March, the sun shines the brightest, peaking at an impressive 305 hours, marking a trend of increasing luminosity that continues through April and May, before settling into a more moderate rhythm. June and July see a slight dip, with 258 and 289 hours respectively, while August maintains a consistent 264 hours. The sunshine returns to full strength in the latter part of the year, with September and October showcasing 290 and 273 hours, respectively, ultimately crescendoing in December to a remarkable 318 hours. This annual cycle reveals a dynamic shift from the robust brightness of early months to a more balanced yet abundant sunshine throughout the year, inviting residents and visitors alike to bask in the warmth of Guarulhos.
In Guarulhos, Brazil, the likelihood of sunny weather in January is relatively low, with only a 13% chance of sunshine. This marks the beginning of a gradual increase in sunshine probability as the year progresses; February and March see a notable uptick, boasting 35% and 36% chances, respectively. As we transition into the depths of winter, the probability of sunny days peaks during July, reaching an impressive 55%. Following this peak, the chances begin to soften slightly in August and September, then descend again toward the year's end, with December wrapping up the year at 31%. Overall, January stands out as a month to expect more clouds than sunshine, but the promise of sunnier days is just around the corner.
In Guarulhos, Brazil, January shines with the longest daylight duration of the year, basking in 13 hours of sunlight that gradually decreases as the year progresses. As February and March unfold, daylight remains steady at 12 hours, providing ample opportunity for outdoor activities. By April, the sun begins to set earlier, introducing 11 hours of daylight, which continues through the cooler months of May to July. Interestingly, as winter transitions into spring in August, daylight experiences a slight uptick back to 11 hours, before returning to 12 hours in October. The year concludes with the return of 13 hours of daylight in both November and December, allowing residents to enjoy those long, bright summer evenings again. This cyclical pattern highlights Guarulhos' unique daylight trends, providing a rhythm that mirrors the changing seasons.
In Guarulhos, Brazil, January greets residents with a gentle average wind speed of 2.3 m/s (5 mph), a calm start to the year that mirrors February’s conditions. As the seasons transition, a slight increase is noticed in April and May, where winds pick up to 2.6 m/s and 2.5 m/s, respectively. The change becomes more pronounced as the year progresses, with August and September ushering in stronger breezes at 3.0 m/s and 3.1 m/s. The peak arrives in October with winds reaching 3.5 m/s (8 mph), before tapering down towards the end of the year. Overall, this steady progression in wind speed reflects the dynamic climate of Guarulhos, where first-month tranquility gradually gives way to the invigorating gusts of late spring and early summer.
Weather in Guarulhos varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Guarulhos, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparison to January, February experiences slightly lower average temperatures, with a maximum of 34°C (93°F) compared to January's peak of 33°C (91°F). While both months have the same minimum temperature of 15°C (59°F), February's average temperature dips just a bit to 22°C (73°F). In terms of precipitation, February sees a decrease, with 166 mm (6.5 in) over 18 days, compared to January's 192 mm (7.6 in) over 19 days. Despite these differences, humidity remains consistent in both months at 88%. For more specific details on February weather, check out Guarulhos weather in February.
In January, Guarulhos experiences warmer weather with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 33°C (91°F), averaging around 23°C (74°F). This month is marked by significant rainfall, receiving about 192 mm (7.6 in) over 19 days, along with high humidity levels at 88%. In contrast, March sees slightly cooler temperatures, with a minimum of 14°C (57°F) and a maximum of 32°C (90°F), averaging 22°C (73°F). Rainfall decreases to 147 mm (5.8 in) across 18 days, while humidity remains comparable at 87%. For more detailed information, check out Guarulhos weather in March.
In January, the weather is characterized by warmer temperatures, with a minimum of 15°C (59°F) and an average high reaching 33°C (91°F). This month sees significant precipitation, with 192 mm (7.6 in) falling over 19 days, and a high humidity level of 88%. In contrast, April offers a slightly cooler climate, with a minimum temperature of 11°C (52°F) and an average of 20°C (69°F). Precipitation drops significantly to 58 mm (2.3 in) over just 9 days, alongside a modest humidity level of 84%. For a closer look at the specifics of April weather, you can visit Guarulhos weather in April.
In January, the weather is markedly warmer, with average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 33°C (91°F), accompanied by high humidity levels at 88%. This month also experiences significant rainfall, totaling 192 mm (7.6 inches) over 19 days. In contrast, May presents a cooler climate, with temperatures averaging between 6°C (43°F) and 29°C (84°F), and lower precipitation at 56 mm (2.2 inches) across just 7 days. The humidity in May is somewhat lower at 79%, making it a more comfortable month overall. For more details, check out Guarulhos weather in May.
January and June present significantly different weather patterns. In January, temperatures range from a minimum of 15°C (59°F) to a sweltering maximum of 33°C (91°F), with an average of 23°C (74°F). The month is characterized by high humidity at 88% and substantial precipitation, totaling 192 mm (7.6 in) over 19 days. Conversely, June brings much cooler temperatures, with lows of 7°C (45°F) and highs reaching 28°C (82°F), averaging 18°C (64°F). Rainfall is significantly reduced to 48 mm (1.9 in) across just 7 days and the humidity decreases to 77%. For a detailed look at the weather conditions in June, visit Guarulhos weather in June.
January and July present a stark contrast in weather conditions. In January, temperatures range from a minimum of 15°C (59°F) to a maximum of 33°C (91°F), with an average of 23°C (74°F). This month is marked by high humidity at 88% and significant precipitation, receiving 192 mm (7.6 in) over 19 days. In contrast, July experiences much cooler conditions, with temperatures fluctuating between a minimum of 2°C (35°F) and a maximum of 29°C (84°F), averaging just 16°C (62°F). This month is characterized by significantly lower precipitation of only 29 mm (1.1 in) over just 3 days and a lower humidity level of 72%. For more insights, check out Guarulhos weather in July.
In January, the weather is typically warm and humid, with temperatures ranging from a comfortable minimum of 15°C (59°F) to a maximum of 33°C (91°F) and an average of 23°C (74°F). This month also experiences significant rainfall, totaling 192 mm (7.6 in) over 19 days, leading to a high humidity level of 88%. In contrast, August sees much cooler conditions, with temperatures dropping to a minimum of 5°C (42°F) and averaging around 17°C (63°F), peaking at 31°C (89°F). Precipitation is notably less in August, with only 64 mm (2.5 in) falling over just 8 days, and a more comfortable humidity level of 65%. For more details on the August weather, visit Guarulhos weather in August.
In January, the weather is significantly warmer and more humid, with temperatures averaging 23°C (74°F) and maximums reaching up to 33°C (91°F). This month also experiences considerable precipitation, with about 192 mm (7.6 in) falling over 19 days, making it quite a wet period. In contrast, September brings a noticeable shift; temperatures are cooler, with an average of 20°C (68°F) and minimums dipping to 9°C (48°F). The rainfall is much lighter in September, at only 47 mm (1.9 in) across just 6 days, and the humidity drops to 58%, creating a more comfortable atmosphere. For more detailed information, check the Guarulhos weather in September.
In January, the weather is typically warmer and more humid, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 33°C (91°F) and an average of 23°C (74°F). The month also sees significant precipitation, averaging 192 mm (7.6 in) over 19 rainy days, contributing to a high humidity level of 88%. In contrast, October experiences slightly cooler temperatures, with a minimum of 12°C (53°F), an average of 20°C (69°F), and a maximum of 36°C (97°F). The rainfall is notably less in October, totaling 135 mm (5.3 in) over 16 days, and the humidity drops to a more comfortable 50%. For more details on October weather, you can check Guarulhos weather in October.
In January, the weather is typically warmer with average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 33°C (91°F), compared to November, which sees a milder average of 20°C (69°F) with minimums of 11°C (52°F) and maximums reaching 34°C (94°F). While January experiences higher humidity levels at 88% and significantly more rainfall totaling 192 mm (7.6 in) over 19 days, November has lower humidity at 75% and less rainfall, measuring 126 mm (5.0 in) across 16 days. This variation highlights January's more tropical conditions in contrast to the relatively drier and cooler November weather. For further details, you can explore Guarulhos weather in November.
In comparing the weather between January and December, both months showcase warm temperatures, with January experiencing slightly higher averages. January has minimum temperatures around 15°C (59°F) and maximums reaching 33°C (91°F), while December starts a bit cooler with minimums at 12°C (54°F) and a similar maximum of 33°C (92°F). Precipitation levels are notably higher in January, totaling 192 mm (7.6 inches) compared to December's 150 mm (5.9 inches), and January sees rain on 19 days versus December's 22 days. Additionally, the humidity is higher in January at 88%, compared to December's 80%. For more insights on the weather specifics for December, you can check Guarulhos weather in December.
As January unfolds in Guarulhos, the weather showcases a vibrant mix of warmth and humidity, setting it apart from other months in the year. With maximum temperatures reaching up to 33°C (91°F), the air is often thick with an average humidity of 88%, creating a tropical feel. While average temperatures hover around a comfortable 23°C (74°F), the frequent rainfall—occurring on 19 days with a total of 192 mm (7.6 in)—adds a refreshing dynamic to the heat. This blend of warmth and moisture makes January a distinctive month, ripe for experiencing the lush beauty of the region. For more insights on the yearly climate patterns, visit Guarulhos Climate.