, with very mild winters (from May to August) and very hot summers (from December to March).
The rains are abundant and there is no dry season, however, they are a little more abundant in spring and autumn, and a little less in the austral winter. In fact, from June to August there are long periods without rain, of a week or two, although it depends on the years.
Although the winter is generally mild, it can sometimes get cold, especially at night. In July 1975 the temperature dropped to -5 °C (23 °F). In July 2010 and 2016 there was a day with a maximum of 10 °C (50 °F).
The city is located in the southwest of Brazil, on the border with Paraguay and Argentina, at 25 degrees south latitude and at 200 meters (650 feet) above sea level.
. They are the largest waterfalls in the world (although not the ones with the greatest flow), and are formed by the Iguazú River, which originates in Brazil, then heads southwest and marks the border between Brazil and Argentina. Hence, the falls can be observed from both the Argentinian and the Brazilian sides.
Further on, about 20 km (12 mi) west of the falls, near the three twin cities, Ciudad del Este (Paraguay), Foz do Iguaçu (Brazil) and Puerto Iguazú (Argentina), the Iguazú flows into the Paraná River.
The highest flow of the falls is recorded in what is the wettest period in the Iguazú River basin, that is, from November to March, while the lowest flow is recorded from August to October.
, being the coolest and driest of the year. Sometimes it can also get cold, so it's better to bring some warm clothes.
Iguazu Falls are most crowded with visitors in January and February, the period of summer holidays in South America, during Easter week, and during the winter holidays (usually in the second half of July).
In the hottest period, from December to February, there is sultry heat and many mosquitoes, and the rains are more abundant, but the days are a little longer and there is a good number of hours of sunshine. In addition, since it is hot, there is no problem if you get wet from rain or spray. Plus, the falls are more spectacular. However, sometimes the rains can create problems and make some trails, as well as the island of San Martín, inaccessible. In addition, it can sometimes get very hot, even 38/40 °C (100/104 °F).
You can then choose the month of April, in which conditions are intermediate between winter and summer, avoiding the week of Easter, and bearing in mind that the weather depends on the years.
. Here are the average temperatures.
January, the hottest month of the year, is generally a warm to hot, muggy month. The average temperature is of
26.8 °C, with a minimum of
21 °C and a maximum of
32.6 °C.
On the coldest nights of the month, the temperature usually drops to around
16.5 °C. However, it dropped to
11.2 °C in January 1996.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
38 °C in January 2006.
Precipitation amounts to
195 mm, distributed over 9 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 55% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
8.9 kph.
February is generally a warm to hot, muggy month. The average temperature is of
26.4 °C, with a minimum of
20.6 °C and a maximum of
32.2 °C.
On the coldest nights of the month, the temperature usually drops to around
16 °C. However, it dropped to
12 °C in February 2020.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
39 °C in February 2014.
Precipitation amounts to
180 mm, distributed over 9 days.
The day lasts on average 12 hours and 55 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
8.8 kph.
March is generally a warm to hot, muggy month. The average temperature is of
25.6 °C, with a minimum of
19.7 °C and a maximum of
31.5 °C.
On the coldest nights of the month, the temperature usually drops to around
14 °C. However, it dropped to
6 °C in March 2012.
On the warmest days of the month, the temperature usually reaches around
35.5 °C. However, it reached
40 °C in March 2005.
Precipitation amounts to
175 mm, distributed over 8 days.
The day lasts on average 12 hours and 10 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
8.5 kph.
April is generally a warm to hot, muggy month. The average temperature is of
23 °C, with a minimum of
17.2 °C and a maximum of
28.7 °C.
On the coldest nights of the month, the temperature usually drops to around
8.5 °C. However, it dropped to
1 °C in April 1999.
On the warmest days of the month, the temperature usually reaches around
33.5 °C. However, it reached
36.3 °C in April 2005.
Precipitation amounts to
150 mm, distributed over 8 days.
The day lasts on average 11 hours and 25 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
8.6 kph.
May is generally a warm month. The average temperature is of
19.1 °C, with a minimum of
13.7 °C and a maximum of
24.5 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C. However, it dropped to
-0.1 °C in May 2007.
On the warmest days of the month, the temperature usually reaches around
30 °C. However, it reached
35.2 °C in May 2002.
Precipitation amounts to
130 mm, distributed over 6 days.
The day lasts on average 10 hours and 50 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of
8.7 kph.
June is generally a warm month. The average temperature is of
18.2 °C, with a minimum of
12.8 °C and a maximum of
23.5 °C.
On the coldest nights of the month, the temperature usually drops to around
3 °C. However, it dropped to
-2 °C in June 2011.
On the warmest days of the month, the temperature usually reaches around
29 °C. However, it reached
32.4 °C in June 2005.
Precipitation amounts to
140 mm, distributed over 8 days.
The day lasts on average 10 hours and 35 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
There are on average 5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of
9.3 kph.
July, the coldest month of the year, is generally a very mild month. The average temperature is of
17.6 °C, with a minimum of
11.7 °C and a maximum of
23.6 °C.
On the coldest nights of the month, the temperature usually drops to around
1 °C. However, it dropped to
-4 °C in July 2009.
On the warmest days of the month, the temperature usually reaches around
29.5 °C. However, it reached
32 °C in July 1993.
Precipitation amounts to
85 mm, distributed over 6 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
9.9 kph.
August is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
19.7 °C, with a minimum of
13 °C and a maximum of
26.4 °C.
On the coldest nights of the month, the temperature usually drops to around
2.5 °C. However, it dropped to
-2.6 °C in August 1999.
On the warmest days of the month, the temperature usually reaches around
33.5 °C. However, it reached
38.8 °C in August 2001.
Precipitation amounts to
105 mm, distributed over 8 days.
The day lasts on average 11 hours and 20 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 45% of the time.
The average humidity is 68%.
The average wind speed is of
10.8 kph.
September is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
21.3 °C, with a minimum of
14.8 °C and a maximum of
27.9 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C. However, it dropped to
-1 °C in September 2006.
On the warmest days of the month, the temperature usually reaches around
35.5 °C. However, it reached
40 °C in September 2020.
Precipitation amounts to
145 mm, distributed over 8 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 41% of the time.
The average humidity is 67%.
The average wind speed is of
11.1 kph.
October is generally a warm to hot, muggy month. The average temperature is of
23.6 °C, with a minimum of
17.5 °C and a maximum of
29.8 °C.
On the coldest nights of the month, the temperature usually drops to around
10.5 °C. However, it dropped to
4 °C in October 1999.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
40 °C in October 2020.
Precipitation amounts to
220 mm, distributed over 9 days.
The day lasts on average 12 hours and 40 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
11.1 kph.
November is generally a warm to hot month. The average temperature is of
24.6 °C, with a minimum of
18.1 °C and a maximum of
31.1 °C.
On the coldest nights of the month, the temperature usually drops to around
11.5 °C. However, it dropped to
8 °C in November 1999.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
40 °C in November 2003.
Precipitation amounts to
155 mm, distributed over 7 days.
The day lasts on average 13 hours and 25 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 69%.
The average wind speed is of
9.9 kph.
December is generally a warm to hot, muggy month. The average temperature is of
26.1 °C, with a minimum of
20 °C and a maximum of
32.1 °C.
On the coldest nights of the month, the temperature usually drops to around
14 °C. However, it dropped to
7 °C in December 2010.
On the warmest days of the month, the temperature usually reaches around
35.5 °C. However, it reached
38 °C in December 2007.
Precipitation amounts to
190 mm, distributed over 9 days.
The day lasts on average 13 hours and 40 minutes. December 21, the summer solstice, is the longest day of the year in the Southern Hemisphere.
There are on average 7.5 hours of sunshine per day. So, the sun shines 55% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
9.1 kph.