Climate and monthly weather forecastFoz do Iguaçu, Brazil

The climate of Foz do Iguaçu

Located in Brazil, the city of Foz do Iguaçu finds itself in the humid subtropical climate zone, often referred to as Cfa within the Köppen climate classification. It maintains a notable distinction, bearing no dry season throughout the year. This city experiences a range of weather conditions which varies as the months slip by.

Broadly speaking, this location shows high temperatures, modestly peaking at 33°C (91.4°F) in January and gradually decreasing to approximately 25°C (77°F) by June. However, it recovers to reach 32.6°C (90.7°F) in December. Similarly, low temperatures also maintain this pattern, starting from 19.6°C (67.3°F) in January, descending to 9.7°C (49.5°F) around July, and again rising to reach 18.6°C (65.5°F) towards the end of the year.

Humidity trends reveal an increase from 77% in January to a high percentage of around 86% in May, subsequently showing a slight reduction over the following months. The UV index exhibits values ranging from 12 in January to its lowest at 4 in June, and subsequently increases towards the end of the year.

With consistent rainfall spread over the year, Foz do Iguaçu is differentiated by its absence of a dry season. The area sees increased precipitation amounts from 196mm (7.72") in January to a high of 220mm (8.66") in October, with occasional, marginal drops and rises in between. This is complemented by an average of 8 to 9 rainy days per month.

The best time to visit Foz do Iguaçu

Given its consistent warm temperature and the lack of a dry season, the ideal time to visit Foz do Iguaçu largely depends on one's tolerance for rain and humidity. For tourists preferring warmer temperatures and longer daylight hours, January to February or November to December could be preferred, while those more tolerant of rainfall might opt for the period between October and November when precipitation levels peak.

The worst time to visit Foz do Iguaçu

The less ideal time for a visit to Foz do Iguaçu could be during winter from June to August, when temperatures drop to lower levels witnessed by the city, dipping to an average low of 10.4°C (50.7°F) in June. Moreover, June offers the shortest daylight span in the year, totalling only 10.6 hours.

Spring weather in Foz do Iguaçu

The spring season from September to November is characterized by temperatures that begin on the cooler side, averaging from 23.3°C (73.9°F) to 28.8°C (83.8°F), and progressively warms up. Rainfall during this period averages around 157mm (6.18") per month, accompanied by increased humidity levels peaking at around 80%.

Summer weather in Foz do Iguaçu

During the summer months of December to February, Foz do Iguaçu sees temperatures climbing up to an average of 31.2°C (88.2°F) with lows around 19°C (66.2°F). However, these months are also humid, with relative humidity percentages averaging at 78.3%. This period also receives the most rainfall, averaging around about 188mm (7.4") per month.

Autumn weather in Foz do Iguaçu

The autumn months of March to May in Foz do Iguaçu are characterized by temperatures ranging from 28.4°C (83.1°F) to 25.1°C (77.2°F), with the similar range in low temperatures. Additionally, the city receives substantial precipitation in this period averaging 151mm (5.94") per month.

Winter weather in Foz do Iguaçu

Winter from June to August brings cooler temperatures in Foz do Iguaçu with average highs dropping to as low as 23.1°C (73.6°F) in June. Rainfall, averaging about 110mm (4.33") per month, remains consistent, although these months register the lowest UV index values, which decreases to as low as 4 in June.

Weather in January

Starting the year, Foz do Iguaçu in January presents warm conditions characteristic of the summer season. This period sees the peak of solar radiation, with a UV index of 12, emphasizing the need for sun protection. The city experiences its highest temperature at 33°C (91.4°F). Weather in January »

Weather in February

As the calendar moves into February, Foz do Iguaçu maintains its summery weather. A slight drop in average temperatures from January is noticeable. The city experiences its second highest accumulation of rainfall at 180mm (7.09"). Weather in February »

Weather in March

March holds on to the warm summer weather, despite a slightly cooler and wetter shift from February. The rains somewhat intensify, with accumulated rainfall measuring 175mm (6.89"). The daylight hours start to reduce, mirroring the gradual transition towards autumn. Weather in March »

Weather in April

April marks the beginning of a noticeable change in the weather of Foz do Iguaçu. A transition has occurred from the city's summer heat to milder autumn temperatures of 28.2°C (82.8°F) during the day. Besides, the intensity of rainfall starts to decrease. Weather in April »

Weather in May

May is a moderate-weather month in Foz do Iguaçu. Marked changes are felt as the city moves deeper into autumn. The average high temperature drops to 25.2°C (77.4°F), offering a pleasant climate for exploring the city's many attractions. Weather in May »

Weather in June

June, being positioned in the winter season, sees a notable drop in temperatures in Foz do Iguaçu. The city witnesses its coolest periods with the average daily temperatures reaching a low of 23.1°C (73.6°F). Despite being winter, rainfall remains a common occurrence but not in as significant amounts as during the summer months. Weather in June »

Weather in July

July typically records the lowest average daily temperature for the year in Foz do Iguaçu, not exceeding 23.7°C (74.7°F). This makes it a quieter month in the city due to the winter season. Rainfall decreases further, providing more dry days, and the relative humidity stabilizes. Weather in July »

Weather in August

Month of August brings a slight warming trend back to Foz do Iguaçu. Still, the climate maintains its temperate feel, as winter slowly begins to relinquish its hold. The city sees an increase in rainfall again, totaling 107mm (4.21") on average. Weather in August »

Weather in September

As spring approaches, September in Foz do Iguaçu experiences a return to warm temperatures. The results are more rainfall with accumulated precipitation reaching 147mm (5.79") for the month. This month proves an excellent time for sightseeing as day temperatures are pleasant and rains are intermittent. Weather in September »

Weather in October

October sees Foz do Iguaçu transition fully into spring. This month records the largest amount of rainfall, with a total of 220mm (8.66"). The increased temperatures and high relative humidity echo the approaching summer season. Weather in October »

Weather in November

November brings the heat of the upcoming summer to Foz do Iguaçu. Although rainfall starts to decrease from the October peak, the humidity and air temperature rise. With high temperatures reaching 31°C (87.8°F) on average, sun protection becomes essential. Weather in November »

Weather in December

Wrapping up the year, December in Foz do Iguaçu is truly summertime, with temperatures soaring as high as 32.6°C (90.7°F). Add to this the yearly second highest rain accumulation at 189mm (7.44"), and one gets the typical elements of a tropical summer. Weather in December »