Last updated: August 21, 2025
Experience the vibrant May weather in Petropolis, Brazil, where temperatures range from a refreshing 9°C (49°F) at night to a delightful maximum of 31°C (88°F) during the day. With an average temperature of 20°C (68°F), this month offers a pleasant climate perfect for exploring the region's lush landscapes. However, be prepared for occasional showers, as 64 mm (2.5 in) of rain falls over approximately 9 days, contributing to a humidity level of 81%. Whether you're enjoying the sunny afternoons or the cooler evenings, May in Petropolis promises a dynamic weather experience.
In May, Petropolis experiences a noticeable shift in temperatures, marking the transition to cooler months. With a minimum temperature dropping to 9°C (49°F) and an average of 20°C (68°F), May evokes a refreshing change from the warmer early months of the year. The maximum temperature reaches a comfortable 31°C (88°F), making it an ideal time for outdoor activities amidst the city's lush landscapes. As the temperatures gradually decline from the higher averages seen in the previous months, residents and visitors alike enjoy the mild climate, reflecting the charming, crisp essence of early autumn in this beautiful Brazilian hub.
May in Petropolis, Brazil, presents a notable shift in precipitation patterns, with an average rainfall of 64 mm (2.5 in) occurring over a modest 9 days. This decline follows April's relatively wet month, highlighting a significant reduction from the 92 mm (3.6 in) recorded previously. As the city transitions to cooler June, the rain further diminishes, indicating a trend towards drier and less frequent precipitation in the late autumn. This pattern suggests a welcome respite for residents and visitors alike, allowing for outdoor activities amid the lush landscapes of Petropolis, even as the seasonal rains begin to lessen.
In May, Petropolis experiences a slight dip in humidity, measuring around 81%. This marks a continuation of a gradual decrease from the wetter months of early year, where humidity hovers above 85% from January to March. Following May, the trend persists with June and July showcasing even lower levels, dropping to 80% and 76%, respectively. This pattern indicates a transition into the drier months of the year, with humidity steadily declining from the lush, moisture-laden atmosphere of the first quarter to a more comfortable environment by late summer. As the year progresses, the humidity levels continue to lower, reaching a low of 61% in October, highlighting the shift towards a much drier climate as Petropolis moves toward the tail end of the year.
In May, Petropolis experiences a very high UV Index of 8, signaling that sun protection is essential for outdoor activities. This month marks a shift from the extreme levels seen from January to April, where the UV Index peaked at 16 in January, leading to a quick 10-minute burn time. As summer transitions into late autumn, the burn time extends to 15 minutes in May, allowing for slightly more outdoor enjoyment. This trend continues as June sees a further drop to a high UV Index of 6, where sun exposure can be managed with 25-minute burn times. As the seasons change, it’s crucial to stay informed about the UV Index to protect your skin effectively. For more detailed information, visit Petropolis UV Index.
UV Risk Categories
In Petropolis, Brazil, May typically brings a delightful blend of sunshine and mild temperatures, boasting an average of 284 hours of glorious sunlight. As spring unfolds, this month shows a slight decrease from the bright 310 hours of March and the 295 hours of April, yet it still offers an abundance of daylight, perfect for outdoor exploration. The sunshine trend continues with July and September outperforming May, reaching 296 and 298 hours respectively. Overall, Petropolis enjoys a diverse range of sunlight throughout the year, with a peak in December at 312 hours, making it a wonderful destination for sun-seekers year-round.
In Petropolis, Brazil, the likelihood of sunny weather sees a promising upward trend as May approaches, with a 44% chance of sunshine that sets the stage for delightful outdoor activities. This improvement follows a steady increase from 43% in April, showcasing a transition from the wetter months earlier in the year. As we move into the winter, June and July bring even brighter prospects with chances soaring to 50% and 63% respectively. Such patterns suggest that if you're planning a visit in May, you'll likely get to enjoy those charming rays of sunshine while exploring this picturesque locale.
As spring unfolds in Petrópolis, Brazil, May brings 11 hours of daylight, maintaining the same duration as the previous month. This shift from April's 11 hours indicates the onset of autumn, where daylight starts to wane. Interestingly, the daylight hours steadily diminish from January's lofty 13 hours down to 10 hours in June and July. However, the trend uplifts again as days gradually lengthen through August and September, signaling a gradual transition toward summer later in the year. This cyclical dance of daylight offers residents a varied experience of natural light throughout the seasons, creating a more dynamic environment as each month passes.
In Petropolis, Brazil, the winds in May maintain an average speed of 1.4 m/s (3 mph), aligning closely with previous months like March and April. This gentle breeze, characteristic of the late autumn season, offers a pleasant respite as temperatures start to dip. Moving forward, the wind speeds gradually increase into the winter months, culminating in August with a notable rise to 1.8 m/s (4 mph). This trend suggests a seasonal shift where wind activity becomes more pronounced, inviting outdoor enthusiasts to enjoy the region’s natural beauty, especially as the milder May winds make way for the refreshing gusts of winter.
Weather in Petropolis varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Petropolis, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present distinct weather experiences. In May, temperatures range from a minimum of 9°C (49°F) to an average of 20°C (68°F), peaking at a maximum of 31°C (88°F). The month sees relatively moderate precipitation of 64 mm (2.5 in) over approximately 9 days, with humidity levels around 81%. In contrast, January is warmer and wetter, with minimum temperatures starting at 17°C (63°F) and reaching an average of 25°C (77°F), hitting highs of 34°C (93°F). This month experiences significantly higher rainfall, totaling 212 mm (8.3 in) spread across 18 days, and boasts a slightly higher humidity of 85%. For more specifics on January weather, see Petropolis weather in January.
When comparing the weather in May and February, we notice several distinct differences. May enjoys average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 31°C (88°F), with an average of 20°C (68°F) and relatively moderate precipitation of 64 mm (2.5 in) spread over 9 days. In contrast, February features warmer conditions, with temperatures between a minimum of 18°C (64°F) and a maximum of 35°C (94°F), averaging at 24°C (76°F). However, February also brings significantly higher rainfall, totaling 302 mm (11.9 in) across 20 days, and slightly higher humidity at 85%. For more detailed information on February weather specifically in Petropolis, you can check Petropolis weather in February.
When comparing the weather in May and March, it's clear that March tends to be warmer and wetter. March experiences temperatures ranging from a minimum of 15°C (60°F) to a maximum of 33°C (92°F), with an average of 24°C (76°F). In contrast, May sees a more moderate range, with minimum temperatures at 9°C (49°F) and maximums reaching 31°C (88°F), averaging around 20°C (68°F). Additionally, March has significantly higher rainfall, totaling 209 mm (8.2 in) over 21 days, while May has only 64 mm (2.5 in) over 9 days. Humidity levels are also slightly higher in March at 86% compared to May's 81%. For more insights on March weather, you can check Petropolis weather in March.
In comparing the weather between April and May, we see some noteworthy differences. April boasts slightly warmer temperatures with a minimum of 13°C (56°F) and an average high of 33°C (92°F), while May's minimum hovers at 9°C (49°F), with a more moderate average high of 31°C (88°F). Additionally, April experiences higher precipitation levels, totaling 92 mm (3.6 in) over 15 days, compared to May's 64 mm (2.5 in) on just 9 days. Humidity remains fairly consistent, with April at 83% and May slightly lower at 81%. For more detailed information, you can visit Petropolis weather in April.
In comparing the weather conditions of May and June, both months exhibit similar average temperatures, with May ranging from a minimum of 9°C (49°F) to a maximum of 31°C (88°F) and June showing a slightly higher minimum of 10°C (50°F) and a maximum of 30°C (87°F). Humidity levels remain fairly consistent, with May at 81% and June at 80%. Notably, June experiences less precipitation, accumulating 45 mm (1.8 in) over 9 days, compared to May's 64 mm (2.5 in) over the same number of days. For further details, you can check Petropolis weather in June.
In comparison to July, May typically enjoys slightly warmer weather, with average temperatures reaching 20°C (68°F) compared to July's average of 18°C (65°F). Although May can have maximum temperatures of up to 31°C (88°F), July's highs are slightly cooler at 30°C (87°F). Precipitation levels are higher in May, with 64 mm (2.5 in) over 9 days, while July experiences significantly less rainfall, totaling only 30 mm (1.2 in) over 5 days. Additionally, May's humidity levels are higher at 81%, compared to July's 76%. For more detailed information, check out Petropolis weather in July.
In comparing the weather between May and August, we see some notable similarities and differences. May experiences slightly warmer temperatures with an average of 20°C (68°F), while August is marginally cooler at an average of 19°C (66°F). Both months have comparable maximum temperatures, with May reaching up to 31°C (88°F) and August a bit higher at 32°C (89°F). Precipitation levels remain nearly identical, with both months seeing around 64 mm (2.5 in) over approximately 9 days, although August has a slightly lower humidity level at 73% compared to May's 81%. For more detailed insights into August weather, you can check this link: Petropolis weather in August.
In May, temperatures in Petropolis typically range from a minimum of 9°C (49°F) to a maximum of 31°C (88°F), with an average of 20°C (68°F). The month is characterized by 64 mm (2.5 in) of precipitation over about 9 days, and humidity levels are relatively high at 81%. In contrast, September offers slightly warmer conditions, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 35°C (95°F), and an average of 21°C (71°F). Precipitation in September is slightly higher at 67 mm (2.6 in), occurring over 10 days, but humidity drops to a more comfortable 68%. For more detailed information, you can check Petropolis weather in September.
May and October present distinct weather profiles, reflecting the transition from spring to autumn. In May, temperatures range from a minimum of 9°C (49°F) to a maximum of 31°C (88°F), with an average of 20°C (68°F). The month sees around 64 mm (2.5 inches) of precipitation over approximately 9 days, accompanied by high humidity levels at 81%. In contrast, October boasts warmer temperatures, with a minimum of 13°C (56°F) and a maximum of 36°C (98°F), averaging 22°C (72°F). However, it experiences significantly higher precipitation at 142 mm (5.6 inches) over about 18 days, and a notably lower humidity of 61%. For more detailed insights on October conditions, you can check Petropolis weather in October.
May and November present contrasting weather patterns that highlight the transition between spring and late fall. In May, temperatures range from a low of 9°C (49°F) to a warm 31°C (88°F), with an average of 20°C (68°F) and relatively high humidity at 81%. Precipitation is moderate, totaling about 64 mm (2.5 in) across 9 days, indicating a mix of sunny days and some rain.
In contrast, November experiences slightly milder temperatures with a minimum of 11°C (53°F), an average of 22°C (72°F), and a maximum of 35°C (95°F). However, it significantly increases in rainfall, accumulating 250 mm (9.9 in) over 19 days, which creates a more humid atmosphere at 72%. This shift reflects the increased precipitation typical for the month, painting a picture of a wetter climate. For more detailed insights, check out Petropolis weather in November.
In comparing the weather between May and December, it is evident that December experiences warmer temperatures overall, with average highs reaching up to 33°C (92°F) compared to May's maximum of 31°C (88°F). While May presents a mild climate with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 31°C (88°F), December remains consistently warmer with a minimum of 14°C (57°F) and an average temperature of 24°C (75°F). However, December also brings significantly higher rainfall, averaging 288 mm (11.3 in) over 24 days, in stark contrast to May's 64 mm (2.5 in) across 9 days. Despite this, humidity levels are slightly more comfortable in December at 75%, compared to May's high of 81%. For more detailed information, you can visit Petropolis weather in December.
As May unfolds in Petropolis, the weather presents a delightful contrast to the preceding months. With a pleasant average temperature of 20°C (68°F), the days are warm yet comfortable, making it an ideal time for outdoor activities. While the humidity hovers at a relatively high 81%, the frequent rain showers—spanning around nine days this month—bring a refreshing change to the lush landscape. This blend of warmth and moisture sets May apart from both the sweltering heat of summer and the cooler winter months, providing a unique experience for residents and visitors alike. To learn more about what to expect throughout the year, visit Petropolis Climate.