Climate - Puerto Iguazu (Argentina)

The climate of Puerto Iguazú is subtropical, 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.
Even though winter is mild, it can get cold at night.
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.
Nearby are the famous Iguazu Falls. 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.

The average temperature of the coldest month (July) is of 17.1 °C (62.7 °F), that of the warmest month (January) is of 26.7 °C (80.1 °F). Here are the average temperatures.
Precipitation amounts to 1920 millimeters (75.6 inches) per year: it is therefore abundant. It ranges from 115 mm (4.5 in) in the driest month (March) to 210 mm (8.3 in) in the wettest one (November). Here is the average precipitation.
On average, there are around 1870 sunshine hours per year. Here are the average sunshine hours per day.

Puerto Iguazu - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)

In January, the warmest month of the year, the average temperature is of 26.7 °C (80 °F), with a minimum of 20.7 °C (69.2 °F) and a maximum of 32.8 °C (91 °F).
On the coldest nights of the month, the temperature usually drops to around 17 °C (62.5 °F). However, in January 1992, it dropped to 13.5 °C (56.3 °F).
On the warmest days of the month, the temperature usually reaches around 36 °C (96.5 °F). However, in January 2006, it reached 38.5 °C (101.3 °F).
Precipitation amounts to 175 mm (6.9 in), distributed over 11 days.
On average, there are 200 hours of sunshine per month, i.e. 6.5 hours per day.
The average humidity is 77%.
The average wind speed is 7 kph (5 kph).

In February, the average temperature is of 26.3 °C (79 °F), with a minimum of 20.4 °C (68.6 °F) and a maximum of 32.3 °C (90.1 °F).
On the coldest nights of the month, the temperature usually drops to around 16 °C (61 °F). However, in February 1991, it dropped to 11 °C (51.8 °F).
On the warmest days of the month, the temperature usually reaches around 36 °C (96.5 °F). However, in February 1997, it reached 39 °C (102.2 °F).
Precipitation amounts to 175 mm (6.9 in), distributed over 12 days.
On average, there are 165 hours of sunshine per month, i.e. 6 hours per day.
The average humidity is 79%.
The average wind speed is 7 kph (4 kph).

In March, the average temperature is of 25.4 °C (78 °F), with a minimum of 19.3 °C (66.8 °F) and a maximum of 31.4 °C (88.5 °F).
On the coldest nights of the month, the temperature usually drops to around 14.5 °C (57.5 °F). However, in March 2012, it dropped to 8 °C (46.4 °F).
On the warmest days of the month, the temperature usually reaches around 35 °C (95 °F). However, in March 1997, it reached 39 °C (102.2 °F).
Precipitation amounts to 115 mm (4.5 in), distributed over 8 days.
On average, there are 170 hours of sunshine per month, i.e. 5.5 hours per day.
The average humidity is 79%.
The average wind speed is 6 kph (4 kph).

In April, the average temperature is of 22.8 °C (73 °F), with a minimum of 16.8 °C (62.3 °F) and a maximum of 28.7 °C (83.7 °F).
On the coldest nights of the month, the temperature usually drops to around 9 °C (48.5 °F). However, in April 1999, it dropped to 3 °C (37.4 °F).
On the warmest days of the month, the temperature usually reaches around 33 °C (91.5 °F). However, in April 2005, it reached 35.1 °C (95.2 °F).
Precipitation amounts to 200 mm (7.9 in), distributed over 10 days.
On average, there are 155 hours of sunshine per month, i.e. 5 hours per day.
The average humidity is 82%.
The average wind speed is 7 kph (4 kph).

In May, the average temperature is of 18.8 °C (66 °F), with a minimum of 13.1 °C (55.6 °F) and a maximum of 24.5 °C (76.1 °F).
On the coldest nights of the month, the temperature usually drops to around 5.5 °C (42 °F). However, in May 1993, it dropped to 0 °C (32 °F).
On the warmest days of the month, the temperature usually reaches around 30 °C (86 °F). However, in May 2018, it reached 32.7 °C (90.9 °F).
Precipitation amounts to 185 mm (7.3 in), distributed over 10 days.
On average, there are 135 hours of sunshine per month, i.e. 4.5 hours per day.
The average humidity is 86%.
The average wind speed is 7 kph (4 kph).

In June, the average temperature is of 17.6 °C (64 °F), with a minimum of 11.9 °C (53.4 °F) and a maximum of 23.3 °C (73.9 °F).
On the coldest nights of the month, the temperature usually drops to around 3 °C (37.5 °F). However, in June 1994, it dropped to -1 °C (30.2 °F).
On the warmest days of the month, the temperature usually reaches around 28.5 °C (83.5 °F). However, in June 2020, it reached 31 °C (87.8 °F).
Precipitation amounts to 155 mm (6.1 in), distributed over 9 days.
On average, there are 115 hours of sunshine per month, i.e. 4 hours per day.
The average humidity is 87%.
The average wind speed is 7 kph (5 kph).

In July, the coldest month of the year, the average temperature is of 17.1 °C (63 °F), with a minimum of 10.7 °C (51.2 °F) and a maximum of 23.5 °C (74.2 °F).
On the coldest nights of the month, the temperature usually drops to around 1.5 °C (34.5 °F). However, in July 2009, it dropped to -2 °C (28.4 °F).
On the warmest days of the month, the temperature usually reaches around 29.5 °C (85 °F). However, in July 2018, it reached 32 °C (89.6 °F).
Precipitation amounts to 130 mm (5.1 in), distributed over 8 days.
On average, there are 130 hours of sunshine per month, i.e. 4 hours per day.
The average humidity is 83%.
The average wind speed is 8 kph (5 kph).

In August, the average temperature is of 19.2 °C (67 °F), with a minimum of 12.2 °C (53.9 °F) and a maximum of 26.3 °C (79.4 °F).
On the coldest nights of the month, the temperature usually drops to around 3 °C (37 °F). However, in August 1991, it dropped to -2 °C (28.4 °F).
On the warmest days of the month, the temperature usually reaches around 33 °C (91.5 °F). However, in August 1995, it reached 35.1 °C (95.2 °F).
Precipitation amounts to 125 mm (4.9 in), distributed over 8 days.
On average, there are 135 hours of sunshine per month, i.e. 4.5 hours per day.
The average humidity is 76%.
The average wind speed is 9 kph (5 kph).

In September, the average temperature is of 21.1 °C (70 °F), with a minimum of 14.2 °C (57.6 °F) and a maximum of 28 °C (82.4 °F).
On the coldest nights of the month, the temperature usually drops to around 5.5 °C (42.5 °F). However, in September 2003, it dropped to 1.2 °C (34.2 °F).
On the warmest days of the month, the temperature usually reaches around 35.5 °C (95.5 °F). However, in September 2020, it reached 40 °C (104 °F).
Precipitation amounts to 135 mm (5.3 in), distributed over 9 days.
On average, there are 105 hours of sunshine per month, i.e. 3.5 hours per day.
The average humidity is 75%.
The average wind speed is 9 kph (6 kph).

In October, the average temperature is of 23.4 °C (74 °F), with a minimum of 17 °C (62.6 °F) and a maximum of 29.9 °C (85.8 °F).
On the coldest nights of the month, the temperature usually drops to around 10.5 °C (51 °F). However, in October 1999, it dropped to 6 °C (42.8 °F).
On the warmest days of the month, the temperature usually reaches around 35.5 °C (96 °F). However, in October 2020, it reached 40.1 °C (104.2 °F).
Precipitation amounts to 180 mm (7.1 in), distributed over 10 days.
On average, there are 165 hours of sunshine per month, i.e. 5.5 hours per day.
The average humidity is 77%.
The average wind speed is 9 kph (5 kph).

In November, the average temperature is of 24.5 °C (76 °F), with a minimum of 17.8 °C (64.1 °F) and a maximum of 31.2 °C (88.2 °F).
On the coldest nights of the month, the temperature usually drops to around 12 °C (54 °F). However, in November 1992, it dropped to 7 °C (44.6 °F).
On the warmest days of the month, the temperature usually reaches around 36 °C (96.5 °F). However, in November 1995, it reached 39.9 °C (103.8 °F).
Precipitation amounts to 210 mm (8.3 in), distributed over 11 days.
On average, there are 190 hours of sunshine per month, i.e. 6.5 hours per day.
The average humidity is 74%.
The average wind speed is 8 kph (5 kph).

In December, the average temperature is of 26.0 °C (79 °F), with a minimum of 19.8 °C (67.6 °F) and a maximum of 32.3 °C (90.2 °F).
On the coldest nights of the month, the temperature usually drops to around 14.5 °C (58.5 °F). However, in December 2010, it dropped to 7.8 °C (46 °F).
On the warmest days of the month, the temperature usually reaches around 36 °C (97 °F). However, in December 1995, it reached 38.7 °C (101.7 °F).
Precipitation amounts to 135 mm (5.3 in), distributed over 10 days.
On average, there are 210 hours of sunshine per month, i.e. 6.5 hours per day.
The average humidity is 76%.
The average wind speed is 8 kph (5 kph).