(according to the Köppen classification, humid subtropical climate - Cfa), with very mild winters and very hot summers.
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 -4 °C (25 °F). In July 2016 there was a day with a maximum of 10 °C (50 °F).
In summer, from December to March, it can get very hot, and the temperature can reach 38/39 °C (100/102 °F). In January 2022 it reached 40.6 °C (105.1 °F), and the average high was 36.2 °C (97.1 °F).
The city is located in the extreme north-east of Argentina, at 170 meters (560 feet) above sea level, in the province of Misiones, on the border with Paraguay and Brazil.
. 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
26.4 °C, with a minimum of
20.7 °C and a maximum of
32 °C.
On the coldest nights of the month, the temperature usually drops to around
17 °C. However, it dropped to
13.5 °C in January 1992.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
38.5 °C in January 2006.
Precipitation amounts to
180.1 mm, distributed over 9 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
7.4 kph.
February is generally a warm to hot, muggy month. The average temperature is of
26 °C, with a minimum of
20.4 °C and a maximum of
31.5 °C.
On the coldest nights of the month, the temperature usually drops to around
16 °C. However, it dropped to
11 °C in February 1991.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
39 °C in February 1997.
Precipitation amounts to
149.9 mm, distributed over 9 days.
The day lasts on average 12 hours and 55 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
7.1 kph.
March is generally a warm to hot, muggy month. The average temperature is of
25 °C, with a minimum of
19.4 °C and a maximum of
30.6 °C.
On the coldest nights of the month, the temperature usually drops to around
14.5 °C. However, it dropped to
8 °C in March 2012.
On the warmest days of the month, the temperature usually reaches around
35 °C. However, it reached
39 °C in March 1997.
Precipitation amounts to
153.3 mm, distributed over 8 days.
The day lasts on average 12 hours and 10 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
6.5 kph.
April is generally a warm month. The average temperature is of
22.4 °C, with a minimum of
16.9 °C and a maximum of
27.8 °C.
On the coldest nights of the month, the temperature usually drops to around
9 °C. However, it dropped to
3 °C in April 1999.
On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
35.1 °C in April 2005.
Precipitation amounts to
161.1 mm, distributed over 7 days.
The day lasts on average 11 hours and 25 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of
6.8 kph.
May is generally a warm month. The average temperature is of
18.4 °C, with a minimum of
13.4 °C and a maximum of
23.5 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C. However, it dropped to
0 °C in May 2007.
On the warmest days of the month, the temperature usually reaches around
30 °C. However, it reached
32.7 °C in May 2018.
Precipitation amounts to
185.5 mm, distributed over 8 days.
The day lasts on average 10 hours and 50 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is of
7.1 kph.
June is generally a very mild month. The average temperature is of
17.2 °C, with a minimum of
12.2 °C and a maximum of
22.2 °C.
On the coldest nights of the month, the temperature usually drops to around
3 °C. However, it dropped to
-1 °C in June 1994.
On the warmest days of the month, the temperature usually reaches around
28.5 °C. However, it reached
31 °C in June 2020.
Precipitation amounts to
145.5 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 3.5 hours of sunshine per day. So, the sun shines 35% of the time.
The average humidity is 87%. Hence, the air is normally humid.
The average wind speed is of
7.5 kph.
July, the coldest month of the year, is generally a very mild month. The average temperature is of
16.8 °C, with a minimum of
11 °C and a maximum of
22.5 °C.
On the coldest nights of the month, the temperature usually drops to around
1.5 °C. However, it dropped to
-2 °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 2018.
Precipitation amounts to
107 mm, distributed over 7 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of
8.3 kph.
August is generally a warm month. The average temperature is of
18.8 °C, with a minimum of
12.3 °C and a maximum of
25.2 °C.
On the coldest nights of the month, the temperature usually drops to around
3 °C. However, it dropped to
-2 °C in August 1991.
On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
35.1 °C in August 1995.
Precipitation amounts to
83.7 mm, distributed over 6 days.
The day lasts on average 11 hours and 20 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
8.7 kph.
September is generally a warm month. The average temperature is of
20.6 °C, with a minimum of
14.3 °C and a maximum of
26.8 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C. However, it dropped to
1.2 °C in September 2003.
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
155.3 mm, distributed over 8 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 37% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
9.3 kph.
October is generally a warm to hot, muggy month. The average temperature is of
22.8 °C, with a minimum of
17 °C and a maximum of
28.7 °C.
On the coldest nights of the month, the temperature usually drops to around
10.5 °C. However, it dropped to
6 °C in October 1999.
On the warmest days of the month, the temperature usually reaches around
35.5 °C. However, it reached
40.1 °C in October 2020.
Precipitation amounts to
247 mm, distributed over 11 days.
The day lasts on average 12 hours and 40 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 41% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
8.8 kph.
November is generally a warm to hot, muggy month. The average temperature is of
24 °C, with a minimum of
17.9 °C and a maximum of
30.1 °C.
On the coldest nights of the month, the temperature usually drops to around
12 °C. However, it dropped to
7 °C in November 1992.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
39.9 °C in November 1995.
Precipitation amounts to
172.3 mm, distributed over 8 days.
The day lasts on average 13 hours and 25 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
8.4 kph.
December is generally a warm to hot, muggy month. The average temperature is of
25.6 °C, with a minimum of
19.8 °C and a maximum of
31.3 °C.
On the coldest nights of the month, the temperature usually drops to around
14.5 °C. However, it dropped to
7.8 °C in December 2010.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
38.7 °C in December 1995.
Precipitation amounts to
219 mm, distributed over 10 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 6 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
7.6 kph.