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Foz Do Iguacu in May: Weather, Average temperature and Climate

Discover the weather for Foz Do Iguacu in May and if it’s a good time to travel (based on historical data).
Check flight prices to Foz Do Iguacu on Avionero:
May

Weather in Foz Do Iguacu in May 2025

OK Weather
Warm
☀️
Sunny
May could be a good time to visit Foz Do Iguacu, as the weather is generally fine. The average high temperature is around +75°F, and there are typically 12 sunny days in May. However, expect about 12 rainy days, and total monthly rainfall of approximately 162 mm. The weather is changeable so pack for every eventuality. Search flights in one click on Avionero.

Average weather

☀️
+75°F
Avg. max. temperature
+32°F
Min.
+95°F
Max.
162 mm
Total precipitation
83%
Avg. humidity
2 m/s
Avg. wind
12 ☀️
Sunny Days
6 ⛅️
Cloudy
12 🌦
Rainy
Our opinion: Foz Do Iguacu has OK weather in May.

Average temperature in Foz Do Iguacu in May

Here are the expected maximum, average and minimum temperatures in Foz Do Iguacu for May based on the historical data.
Last Year
Historical Data

The expected average maximum temperature in May is +77°F with a maximum of +86°F and a minimum of +46°F.

The average maximum temperature goes down 23% by the end of the month, compared with the beginning of the month, from +84°F to +75°F.

Is Foz Do Iguacu warm or cold in May?

Foz Do Iguacu is typically warm in May.

Maximum temperatures go down compared to the previous month from +82°F to +75°F. The minimum temperature also goes down from +64°F to +59°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

May is one of the coolest months in Foz Do Iguacu, here is the comparison with other months:

Climate in Foz Do Iguacu in May

Foz Do Iguacu weather looks like this, on average, in May and the surrounding months.
AprilMayJune
Avg. temperature
+82°F+75°F+72°F
Min. temperature
+36°F+32°F+30°F
Max. temperature
+97°F+95°F+90°F
Rainfall
147 mm162 mm129 mm
Wind
2 m/s2 m/s2 m/s
Humidity
80%83%83%
Air pressure
1013 HPa1015 HPa1016 HPa
Sunny days
101211
Cloudy days
567
Rainy days
131211
Snowy days
000

May typically has worse weather conditions compared to April. It’s getting colder in May. From +82°F in the day, the average maximum temperature lowers to +75°F. Prepare for more rain. Average rainfall goes from 147 mm to 162 mm. Humidity rises from 80% to 83%. The average wind speed doesn’t change much during May, staying around 2 m/s. The good news is there are likely to be more sunny days in May, from 10 to 12.

June brings much the same weather, it remains ok.

Wind

Wind speed in Foz Do Iguacu in May based on historical data.
Last Year
Historical Data

The average wind speed is 2 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Foz Do Iguacu is gradually increasing during May, going from 2 m/s to 2 m/s over the course of the month.

Rain

Amount of rainfall in mm during May in Foz Do Iguacu based on historical data.
Last Year
Historical Data
Total precipitation in May is about 87 mm, with a 39% chance of rain on a typical day. The maximum amount of rainfall per day is around 36 mm, which is moderate rain. May is a pretty wet month with over 12 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
May is one of the rainiest months in Foz Do Iguacu, here is a comparison with other months, total mm:
Foz Do Iguacu wettest month is October, where a typical day has a 45% chance of precipitation and 194 mm of rainfall per day. August, on the other hand, is the driest month with a mere 29% chance of precipitation and 99 mm of rainfall per day.

How was the weather last May in Foz Do Iguacu?

This is the weather in Foz Do Iguacu in May 2023:
1 May
☀️
+85°F
2 May
☁️
+83°F
3 May
🌧️
+72°F
4 May
🌧️
+76°F
5 May
☁️
+87°F
6 May
☀️
+83°F
7 May
☀️
+85°F
8 May
☁️
+71°F
9 May
☀️
+76°F
10 May
☀️
+76°F
11 May
☀️
+72°F
12 May
☀️
+72°F
13 May
☀️
+74°F
14 May
☀️
+78°F
15 May
☀️
+80°F
16 May
☀️
+80°F
17 May
☀️
+80°F
18 May
☀️
+80°F
19 May
☀️
+78°F
20 May
☀️
+74°F
21 May
☀️
+71°F
22 May
🌧️
+72°F
23 May
☀️
+83°F
24 May
☀️
+83°F
25 May
☀️
+85°F
26 May
☀️
+85°F
27 May
☀️
+74°F
28 May
🌧️
+74°F
29 May
🌧️
+76°F
30 May
☁️
+72°F
31 May
☀️
+76°F
In May 2023 Foz Do Iguacu had 22 sunny days, 4 cloudy days, and 5 rainy days. The average maximum temperature was +77°F, with an absolute maximum of +86°F and a minimum of +70°F. The average humidity was 83%, with a maximum of 100% and a minimum of 47%. The average wind speed was 2 m/s, with a maximum of 6 m/s and a minimum of 0 m/s.
Are you planning a trip in May?

Climate Change Over the Years

This is how Foz Do Iguacu climate has changed over the last 43 years.

The climate in Foz Do Iguacu in May has not changed that much over the last 43 years.

The average temperature was the lowest in 1983 (+79°F) and the highest in 2020 (+85°F). The driest year was 2021 with only 1098 mm of rainfall, and the wettest year was 1983 with 2760 mm.

FAQ

Frequently asked questions about the weather in Foz Do Iguacu in May:

Is May a good time to visit Foz Do Iguacu?

It’s always a good time to visit Foz Do Iguacu, but the weather is changeable in May, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Foz Do Iguacu in May?

May is warm in Foz Do Iguacu. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Is Foz Do Iguacu rainy in May?

Foz Do Iguacu is often rainy in May. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Foz Do Iguacu in May?

The amount of sunny days in Foz Do Iguacu during May varies; prepare for a mix of clouds and sun.

Other cities in Brazil

Check out the weather for other cities in Brazil.

Monthly weather in Foz Do Iguacu

Source of the data

For this page, we’ve looked at the typical weather in Foz Do Iguacu, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.