Last updated: August 21, 2025
In May, Puerto Iguazú experiences a delightful blend of warm and cool weather, with maximum temperatures soaring up to 33°C (91°F) while maintaining an average of 19°C (67°F). The minimum temperature can dip to a crisp 6°C (44°F), offering a refreshing contrast. Travelers should prepare for some rain, as the area receives an average of 149 mm (5.9 in) of precipitation over about 10 days, often accompanied by humidity levels around 75%. This combination of temperatures and moisture creates a vibrant environment, making May an exciting time to explore the natural wonders of this stunning region.
As May unfolds in Puerto Iguazu, Argentina, temperatures gradually cool, marking a noticeable shift from the warmer months. With minimums dipping to 6°C (44°F) and averages settling around 19°C (67°F), the climate is pleasantly mild, ideal for outdoor exploration of the region's breathtaking natural wonders. The maximum temperature reaches a comfortable 33°C (91°F), providing warmth without the intense heat of the summer months. This transition not only signifies the arrival of autumn but also presents an excellent opportunity for visitors to enjoy the lush landscapes and iconic waterfalls under pleasant skies.
In May, Puerto Iguazu experiences a significant increase in precipitation, with an average of 149 mm (5.9 in) of rainfall spread over about 10 days. This places May slightly below the wettest months of January and October but still indicates a notably wet period as the region transitions towards the cooler winter months. The rainfall is consistent with the general trend of frequent precipitation that characterizes the early part of the year, with a marked drop in July and August when only 43 mm (1.7 in) is recorded. This pattern highlights May's role as a bridge, retaining ample moisture before the dry season begins, making it a vital time for the region's lush vegetation and wildlife.
In May, Puerto Iguazu experiences a comfortable humidity level of 75%, marking a gentle transition from the wetter months of summer. This level is consistent with the gradual decline seen since the peak of 82% in January, followed by a steady decrease as the region moves toward the cooler winter months. As the humidity drops to around 70% in June, visitors can enjoy the lush landscapes and breathtaking waterfalls without the overwhelming stickiness often associated with tropical climates. The shift from the high humidity of the summer months to the more moderate levels of late autumn illustrates the region's dynamic weather patterns, making May an appealing time to explore all that Puerto Iguazu has to offer.
In May, Puerto Iguazu, Argentina experiences a notable shift in its UV Index, dropping to a moderate 7 on the scale, categorized as high exposure. As the region transitions from the extreme levels observed in the earlier months, where the UV Index peaked at 15, the burn time increases to 25 minutes. This trend marks a welcome respite for outdoor enthusiasts, allowing for extended sun exposure while still remaining cautious. However, it's essential to stay informed, as the UV levels are still significant compared to the winter months ahead. For a detailed understanding of ongoing UV conditions, explore more at Puerto Iguazu UV Index.
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May in Puerto Iguazu, Argentina, greets visitors with a delightful average of 253 sunlight hours, a number that reflects a generally bright and inviting atmosphere. This month bridges the transition from the lush summer months of January through April, which boast impressive sunlight totals, to the cooler, cloudier days of winter. Notably, May's sunshine hours are slightly lower than the preceding months, yet they still provide a warm embrace for those exploring the region's breathtaking waterfalls and rich biodiversity. As the year progresses, the light continues to shift, hinting at the approaching winter while allowing time to savor the tail end of autumn’s beauty before the colder months set in.
As May approaches in Puerto Iguazú, Argentina, travelers can expect a promising likelihood of sunny weather, with a 63% chance of sunshine this month. This marks a slight increase from April's 62%, continuing a trend of relatively high sun chances that have emerged since February’s 67%. Following this, June sees a dip to 46%, suggesting that May is a delightful time to enjoy the region's stunning natural landscapes before the clouds roll in. Overall, the onset of May signals a lovely balance of warmth and light, making it an ideal moment for outdoor adventures amidst the breathtaking waterfalls.
As the vibrant landscape of Puerto Iguazú transitions through the year, daylight duration undergoes a captivating shift. In May, the sunshine graces the region for 10 hours, marking the beginning of deeper autumn when hours of daylight gradually decline. This trend continues into June and July, where daylight remains steady at 10 hours. However, as winter recedes, once again, the hours begin to lengthen, with August and September seeing a revival to 11 hours. The momentum builds through the months, leading to the splendid return of 12 hours in October, culminating in the peak of summer with 13 hours in January and November. This rhythmic dance of daylight not only influences the natural beauty of the surrounding rainforest but also enriches the cultural fabric of the region throughout the year.
In May, Puerto Iguazu experiences a gentle breeze with an average wind speed of 2.4 m/s (5 mph), contributing to the region’s pleasant autumn climate. This moderate wind pattern reflects a slight decrease from the previous months, yet remains consistent with the tranquil atmosphere of late fall. As April and June show similar wind speeds of 2.5 m/s (6 mph), May's breezes hint at the shift toward the cooler winter months, while still offering a comfortable outdoor experience for visitors. This transitional period allows for enjoyable exploration of the breathtaking natural landscapes, making May an ideal time for both relaxation and adventure in this vibrant part of Argentina.
Weather in Puerto Iguazu varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Puerto Iguazu, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in May and January, notable differences emerge. May experiences cooler temperatures, with a minimum of 6°C (44°F) and an average of 19°C (67°F), while January boasts warmer temperatures, ranging from a minimum of 16°C (62°F) to a maximum of 39°C (102°F). Both months receive significant precipitation, with May recording 149 mm (5.9 in) over about 10 days and January slightly higher at 154 mm (6.1 in) over 16 days. Additionally, January's humidity levels are higher at 82%, compared to May's 75%. For more detailed insights into January's weather, you can check Puerto Iguazu weather in January.
When comparing the weather in May and February, it's clear that February tends to be warmer overall. With minimum temperatures starting at 15°C (59°F) and averaging 26°C (79°F), February can reach maximums of up to 37°C (98°F). In contrast, May experiences a much cooler range, with minimum temperatures hitting 6°C (44°F) and an average of 19°C (67°F), peaking at 33°C (91°F). While February has slightly less precipitation, with 111 mm (4.4 in) across 11 days, May receives more rainfall at 149 mm (5.9 in) over 10 days. Both months have high humidity, with February at 79% and May at 75%. For those interested in more details, you can check out Puerto Iguazu weather in February.
In comparing the weather of May and March, we find notable differences in temperature and precipitation. March typically experiences a higher minimum temperature of 13°C (55°F) and a warmer average of 25°C (78°F), with a maximum reaching up to 36°C (97°F). In contrast, May starts cooler with a minimum of 6°C (44°F) and has an average temperature of 19°C (67°F), although it can still reach a maximum of 33°C (91°F). Precipitation levels are also significant, with March seeing 121 mm (4.8 in) over 11 days, just slightly less than May's 149 mm (5.9 in) over 10 days. Interestingly, both months maintain a consistent humidity level of 75%. For a detailed look at the weather in March, you can visit Puerto Iguazu weather in March.
When comparing the weather in May and April, we see notable differences. In April, temperatures range from a minimum of 8°C (47°F) to a maximum of 35°C (95°F), with an average temperature of 22°C (73°F). Moreover, April experiences less rainfall, totaling 105 mm (4.1 in) over just 6 days, and a humidity level of 74%. In contrast, May shows a wider temperature range, with minimums dropping to 6°C (44°F) while still peaking at 33°C (91°F) and maintaining an average of 19°C (67°F). However, May is wetter, receiving 149 mm (5.9 in) of precipitation across 10 days and slightly higher humidity at 75%. For more details on the conditions in April, you can refer to Puerto Iguazu weather in April.
In comparing the weather of May and June, May tends to be slightly warmer with average temperatures ranging from a minimum of 6°C (44°F) to a maximum of 33°C (91°F), while June sees a slightly cooler minimum of 2°C (36°F) and a maximum of 30°C (87°F). Both months experience similar precipitation levels, with May receiving 149 mm (5.9 in) over 10 days and June having just a bit less at 146 mm (5.7 in) over 9 days. Additionally, May's higher humidity at 75% contrasts with June's more comfortable 70%. For a detailed view of the weather, check out Puerto Iguazu weather in June.
In May, the weather is generally warmer, with temperatures ranging from a minimum of 6°C (44°F) to a maximum of 33°C (91°F), and an average of 19°C (67°F). May also sees higher precipitation levels at 149 mm (5.9 in) over approximately 10 days, coupled with a humidity of 75%. In contrast, July experiences cooler conditions with temperatures varying from a minimum of 1°C (34°F) to a maximum of 30°C (87°F), and an average of 17°C (63°F). July has significantly less precipitation at 43 mm (1.7 in) over just 6 days, along with lower humidity at 61%. For more detailed weather insights, you can check Puerto Iguazu weather in July.
In comparing the weather between May and August, we observe some notable differences. May features a wider temperature range, with minima reaching 6°C (44°F) and maxima soaring up to 33°C (91°F). This month also sees higher precipitation levels at 149 mm (5.9 in) across approximately 10 days, coupled with a humid environment at 75%. In contrast, August offers a cooler experience with a minimum temperature of 3°C (38°F) and a maximum of 34°C (94°F), though the average remains similar to May at around 19°C (66°F). Precipitation decreases significantly to 76 mm (3.0 in) over just 6 days, leading to a far drier atmosphere with lower humidity at 49%. For a closer look at the specifics of August weather, check out Puerto Iguazu weather in August.
May and September exhibit contrasting weather patterns. In May, temperatures range from a minimum of 6°C (44°F) to a maximum of 33°C (91°F), with an average of 19°C (67°F). This month experiences higher precipitation, accumulating 149 mm (5.9 in) over about 10 days, coupled with a humidity level of 75%. In contrast, September offers milder temperatures, with a minimum of 9°C (49°F), an average of 23°C (74°F), and a peak of 39°C (102°F). Rainfall decreases significantly to 78 mm (3.1 in) over just 6 days, and humidity drops to 52%. Overall, September provides a drier and more comfortable climate compared to the wetter and more humid May. For further details, you can check Puerto Iguazu weather in September.
May and October present contrasting weather conditions. In May, temperatures range from a cool 6°C (44°F) at night to a warm 33°C (91°F) during the day, with an average temperature of 19°C (67°F). The month sees significant rainfall, totaling 149 mm (5.9 in), spread over 10 days, and a high humidity level of 75%. In contrast, October experiences warmer nights with a minimum of 12°C (53°F) and can peak at a scorching 40°C (103°F), with an average of 24°C (75°F). Although October has slightly more precipitation at 171 mm (6.7 in) over 12 days, the humidity is lower at 55%. For more detailed insights, you can check the weather specifics here: Puerto Iguazu weather in October.
May and November in Puerto Iguazu exhibit contrasting weather patterns. In May, temperatures range from a cooler minimum of 6°C (44°F) to a pleasant average of 19°C (67°F), with occasional highs reaching 33°C (91°F). The month also sees a substantial amount of rainfall, totaling 149 mm (5.9 in) over about 10 days, accompanied by relatively high humidity at 75%. In contrast, November offers warmer conditions, with minimum temperatures at 14°C (58°F) and averages rising to 25°C (77°F), peaking at 37°C (98°F). Precipitation is slightly lower at 118 mm (4.7 in) across 9 days, and humidity is marginally lower at 73%. For a more detailed look at November's weather, visit Puerto Iguazu weather in November.
Comparing the weather in May and December reveals notable differences in temperature and humidity. In May, temperatures range from a minimum of 6°C (44°F) to a maximum of 33°C (91°F), with an average of 19°C (67°F). The month sees around 149 mm (5.9 in) of precipitation spread over 10 days, with humidity levels at 75%. In contrast, December experiences milder temperatures, with a minimum of 14°C (58°F), an average of 26°C (79°F), and a high of 38°C (100°F). While precipitation slightly increases to 155 mm (6.1 in) across 11 days, the humidity rises to 85%. For more detailed information, check out Puerto Iguazu weather in December.
As May settles over Puerto Iguazu, visitors can expect a refreshing change from the sweltering heat of the summer months. With average temperatures hovering around a comfortable 19°C (67°F), this month offers a pleasant respite, making it ideal for exploring nature's wonders. However, be prepared for occasional rain, as May experiences about 10 days of precipitation, contributing to the region's lush landscapes. The humidity remains high at 75%, adding a tropical feel to the air. This transitional month invites travelers to experience the beauty of Puerto Iguazu in a mild climate, a delightful contrast to the hotter, more humid months that precede it. For a deeper dive into what to expect year-round, check out Puerto Iguazu Climate.