Last updated: August 21, 2025
In Itatiaia, Brazil, May offers a captivating blend of mild temperatures and moist air, with maximums reaching 28°C (83°F) and an average of 18°C (64°F). The temperature dips to a crisp 6°C (42°F) at night, creating a pleasant contrast. This month sees approximately 74 mm (2.9 in) of rain spread over 10 days, contributing to a high humidity of 81%. The lush landscapes come alive during this time, making it an enchanting season for nature enthusiasts and visitors alike.
In May, Itatiaia experiences a noticeable drop in temperatures, with minimums dipping to 6°C (42°F), marking one of the coolest months of the year. The average temperature settles at a comfortable 18°C (64°F), while daytime highs can reach up to 28°C (83°F). This month transitions from the warmer April, where the average was 20°C (69°F), creating a refreshing shift that hints at the cooler winter months ahead. As temperatures begin to cool, May offers an ideal climate for outdoor activities, making it a perfect time to explore the beautiful landscapes of this Brazilian gem.
In May, Itatiaia experiences a notable decline in precipitation, with only 74 mm (2.9 in) of rainfall occurring over approximately 10 days. This contrasts sharply with the heavier rains of earlier months, such as February, which witnessed a staggering 333 mm (13.1 in) over 22 days. As the year progresses into May, the precipitous drop from April's 119 mm (4.7 in) marks the start of a drier period, leading into June and July, where the rainfall further tapers off. This trend highlights a seasonal transition in Itatiaia, as the region shifts from the wetter summer months into a cooler, comparatively drier winter season.
As May arrives in Itatiaia, Brazil, the humidity begins to show a subtle decline from the previous months, settling at 81%. This decrease marks a transition from the wetter summer months, where humidity levels typically hover around 85% in January and February and peak at 86% in March. Following May, the trend continues downward with June registering 80% and July dipping to 76%. This gradual shift not only indicates the changing seasons but also provides a more comfortable climate for outdoor activities, as the lush landscapes of Itatiaia gradually dry out in anticipation of the cooler, drier months ahead.
In May, Itatiaia, Brazil, experiences a notable dip in its UV Index, registering at 8, which falls into the very high exposure category. This marks a shift from the extreme levels seen in the preceding months of January through April, where indices soared to 16. While May allows for a slightly longer burn time of 15 minutes, caution remains necessary, as the sun's intensity can still cause skin damage. This pattern of fluctuating UV levels is evident, with the index climbing again in the subsequent months. For those planning outdoor activities, it's crucial to stay informed about the UV Index throughout the year. For more detailed insights, check out the Itatiaia UV Index.
UV Risk Categories
In May, Itatiaia, Brazil, enjoys an impressive 284 hours of sunshine, contributing to the region’s lush landscapes and vibrant flora. This month maintains a consistent brightness, just slightly trailing behind the peak of 300 hours seen in both March and July. The sunny disposition of May follows a lively April, which boasted 285 hours, indicating a delightful transition into the winter months. As temperatures cool, the abundant sunlight helps preserve the warmth of the days, allowing visitors to bask in the beauty of Itatiaia’s natural wonders. The sunshine trends throughout the year reveal a gradual ebb and flow, with summer months typically experiencing around 300 hours while the winter months hold steady around the mid-200s, affirming Itatiaia's reputation as a sun-kissed destination year-round.
In Itatiaia, Brazil, the likelihood of sunshine experiences a noticeable shift as the year progresses. May sees a 42% chance of sunny weather, making it a solid choice for outdoor enthusiasts, especially when compared to the preceding months. While April boasts a slightly higher 45% chance, there is a clear upward trend from the initially gloomy months of January and February. As the year advances into the more favorable season, the weather patterns further brighten, leading into the 63% likelihood of sun in July, the sunniest month. Thus, May serves as a delightful transition into the more radiant days ahead, striking a balance between pleasant weather and the lush beauty of the region.
In Itatiaia, Brazil, daylight duration dances through the seasons, revealing a captivating rhythm. January and November shine brightly with 13 hours of daylight, marking the peak of summer, while February and October maintain a pleasant 12 hours. As the year progresses toward the cooler months, March and April witness a subtle decline to 12 and 11 hours respectively, leading into May, which retains that same 11-hour glow. The transition into winter brings shorter days, with June and July offering just 10 hours of sunlight. Fortunately, as spring approaches, daylight begins to lengthen once again in August and September, returning to 11 hours. Overall, the daylight experience in Itatiaia reflects a vibrant cycle of changes, showcasing the beauty of nature's rhythm throughout the year.
In May, Itatiaia experiences a gentle breeze, with an average wind speed of 1.3 m/s (3 mph), consistent with the preceding months. This moderate airflow contributes to the pleasant climate that makes the region so inviting during this time of year. As spring transitions into winter, it’s interesting to note that wind speeds show a gradual increase, peaking in August and September. This fluctuation hints at the seasonal shifts that affect the weather patterns in Itatiaia. The steady winds in May are not only refreshing but also offer a glimpse of the more vigorous breezes to come, enhancing the natural beauty and outdoor experiences in this picturesque Brazilian destination.
Weather in Itatiaia varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Itatiaia, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of May and January, we see notable differences in temperature and precipitation. May typically experiences milder temperatures, with a minimum of 6°C (42°F) and a maximum of 28°C (83°F), averaging around 18°C (64°F). It also has a moderate level of precipitation at 74 mm (2.9 in) over about 10 days, with humidity at 81%. In contrast, January is considerably warmer, featuring temperatures that range from a minimum of 15°C (60°F) to a maximum of 32°C (90°F), averaging 23°C (73°F). However, January is also much wetter, with 291 mm (11.5 in) of rainfall spread across approximately 20 days and slightly higher humidity at 85%. For more detailed information, check out Itatiaia weather in January.
When comparing the weather in May and February, notable differences emerge. May tends to have milder temperatures, with a minimum of 6°C (42°F) and an average of 18°C (64°F), reaching a maximum of 28°C (83°F). In contrast, February is warmer overall, with temperatures ranging from a minimum of 15°C (60°F) to a maximum of 33°C (92°F) and an average of 22°C (72°F). February also experiences significantly higher precipitation at 333 mm (13.1 in) over 22 days, compared to May's 74 mm (2.9 in) over just 10 days. Humidity levels are quite similar, with February slightly ahead at 85% versus May's 81%. For more details, you can check Itatiaia weather in February.
In comparing the weather of May and March, it is evident that March experiences warmer temperatures with an average of 22°C (72°F) and peaks at 31°C (89°F), while May has a milder average of 18°C (64°F) and a maximum of 28°C (83°F). Additionally, March sees significantly more rainfall, totaling 281 mm (11.1 in) over 20 days, compared to May's 74 mm (2.9 in) over just 10 days. Humidity levels are also slightly higher in March at 86%, compared to May's 81%. For more details, check out Itatiaia weather in March.
When comparing the weather in April and May, we can observe several notable differences. April boasts warmer temperatures, with a minimum of 11°C (52°F) and an average of 20°C (69°F), peaking at 31°C (88°F). In contrast, May starts cooler, featuring a minimum temperature of 6°C (42°F) and an average of 18°C (64°F), reaching a maximum of 28°C (83°F). Additionally, April experiences significantly higher precipitation levels at 119 mm (4.7 in) over 16 days, compared to May's 74 mm (2.9 in) across just 10 days. Humidity levels remain quite similar, with April at 83% and May slightly lower at 81%. For more specifics on April weather, you can check Itatiaia weather in April.
May and June showcase similar temperature ranges, with May boasting a minimum of 6°C (42°F) and a maximum of 28°C (83°F), while June slightly increases the minimum to 7°C (46°F) and the maximum to 29°C (84°F). Both months have the same average temperature of around 18°C (64°F). However, June experiences less precipitation, with only 40 mm (1.6 in) over 9 days compared to May's 74 mm (2.9 in) over 10 days. Humidity remains fairly consistent, decreasing slightly from 81% in May to 80% in June. For a more detailed comparison of weather patterns, check out Itatiaia weather in June.
In comparing May and July weather, May tends to be slightly warmer, with average temperatures reaching 18°C (64°F) and a maximum of 28°C (83°F). In contrast, July experiences a cooler average of 16°C (61°F) and a maximum temperature of 27°C (81°F). Additionally, May sees more precipitation, totaling 74 mm (2.9 in) over about 10 days, while July has significantly less at 33 mm (1.3 in) over just 5 days. Humidity levels are also marginally higher in May at 81% compared to 76% in July. For more detailed weather information, you can visit Itatiaia weather in July.
In May, the weather features a wider temperature range with minimums of 6°C (42°F) and maximums reaching 28°C (83°F), resulting in an average temperature of 18°C (64°F). The month experiences about 74 mm (2.9 in) of precipitation over approximately 10 days, accompanied by a high humidity level of 81%. In contrast, August sees slightly lower temperatures, with minimums of 5°C (41°F) and maximums peaking at 30°C (86°F), yielding an average of 17°C (63°F). Precipitation is also slightly reduced to 71 mm (2.8 in) over 9 days, and humidity drops to 73%. For more specific details about August, visit Itatiaia weather in August.
May and September present interesting contrasts in weather. In May, temperatures range from a cool 6°C (42°F) to a warmer 28°C (83°F), with an average of 18°C (64°F) and relatively high humidity at 81%. The month also sees around 74 mm (2.9 in) of precipitation over approximately 10 days. In comparison, September offers slightly warmer temperatures, with a minimum of 8°C (47°F) and a maximum of 33°C (92°F), averaging 20°C (68°F). While it experiences higher precipitation at 90 mm (3.5 in) across 11 days, September has notably lower humidity at 68%. Overall, both months feature enjoyable weather, though September leans towards a more summer-like feel. For specific details on September's weather conditions, check out Itatiaia weather in September.
May and October showcase distinct weather patterns that highlight the transition between spring and fall. In May, temperatures range from a refreshing 6°C (42°F) to a warm 28°C (83°F), with an average of 18°C (64°F). The month experiences moderate rainfall, accumulating to about 74 mm (2.9 in) over approximately 10 days, along with high humidity levels at 81%.
Conversely, October tends to be warmer, with a minimum temperature of 12°C (53°F) and maximum reaching up to 34°C (93°F), averaging around 21°C (69°F). However, this month features significantly higher precipitation, totaling 200 mm (7.9 in) over roughly 21 days, but humidity is lower at 61%. For an in-depth look at what to expect, check Itatiaia weather in October.
May and November present distinct weather patterns that can greatly influence outdoor activities. In May, temperatures range from a minimum of 6°C (42°F) to a maximum of 28°C (83°F), with an average of 18°C (64°F). The month experiences about 74 mm (2.9 in) of precipitation over 10 days, accompanied by relatively high humidity at 81%. In contrast, November sees warmer temperatures, with lows of 11°C (52°F) and highs reaching 32°C (89°F), averaging 20°C (69°F). However, it brings significantly more rainfall, totaling 289 mm (11.4 in) over 21 days, but with lower humidity at 72%. For a more detailed comparison of rainfall patterns, check out Itatiaia weather in November.
May and December present distinct weather characteristics in terms of temperature and precipitation. In May, temperatures range from a low of 6°C (42°F) to a high of 28°C (83°F), with an average of 18°C (64°F). The month experiences 74 mm (2.9 in) of precipitation over about 10 days, accompanied by a relatively high humidity level of 81%. In contrast, December is warmer, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 32°C (89°F) and an average of 22°C (71°F). However, it is much wetter, receiving 414 mm (16.3 in) of rainfall over 26 days, while humidity drops slightly to 75%. For more detailed insights into December weather, refer to Itatiaia weather in December.
As we transition into May, Itatiaia experiences a notable shift in weather patterns compared to other months. The temperatures are comfortably mild, with warm days and cooler nights, making it an ideal time for outdoor activities. While the humidity remains relatively high, the increased precipitation—averaging about 10 days of rain—adds a refreshing touch to the lush landscape. This month stands out not only for its pleasant climate but also for the revitalizing beauty that the rain brings. For more detailed insights, check out Itatiaia Climate.