Best time to visit Iguazu Falls
Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.
Compare with another destination
Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.
Similar climatesPuerto Iguazú98% · Brisbane85% · Colonia del Sacramento79%
Other destinations with the most-alike year-round climate to Iguazu Falls (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Iguazu Falls's. Based on the 2020-2024 climatology, not this year's actual weather.
Month-by-month
| Month | Temp °C | Feels °C | Rain days | Rain h | Rain h/day | Humidity | Wind km/h | Sun h | UV | Interest | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | 22–31 | 35 | 16 | 189 | 11.8 | 64% | 14 | 255 | 12 | Moderate | 2 |
| Feb | 21–31 | 34 | 11 | 122 | 11.1 | 60% | 13 | 237 | 11 | Moderate | 3 |
| Mar | 21–30 | 34 | 12 | 126 | 10.5 | 62% | 13 | 247 | 10 | Quiet | 4 |
| Apr | 18–27 | 29 | 9 | 94 | 10.4 | 64% | 13 | 209 | 7 | Quiet | 7 |
| May | 14–23 | 24 | 10 | 129 | 12.9 | 69% | 13 | 191 | 5 | Quiet | 8 |
| Jun | 14–23 | 23 | 10 | 123 | 12.3 | 72% | 14 | 181 | 4 | Quiet | 8 |
| Jul | 13–23 | 23 | 6 | 70 | 11.7 | 65% | 14 | 201 | 4 | Quiet | 9 |
| Aug | 15–25 | 25 | 6 | 67 | 11.2 | 59% | 15 | 212 | 6 | Peak | 9 |
| Sep | 17–28 | 29 | 8 | 90 | 11.3 | 59% | 16 | 203 | 7 | Moderate | 7 |
| Oct | 19–29 | 31 | 13 | 149 | 11.5 | 63% | 15 | 223 | 8 | Busy | 5 |
| Nov | 20–30 | 32 | 11 | 108 | 9.8 | 56% | 15 | 244 | 10 | Peak | 5 |
| Dec | 21–31 | 35 | 13 | 137 | 10.5 | 58% | 14 | 263 | 11 | Peak | 3 |
UV Index in Iguazu Falls by Month
UV index in Iguazu Falls peaks at 12 (extreme) in January, dropping to 4 (moderate) in June. January, February, March, October, November, December reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.
Best months in detail
August
9/1015–25°C · 6 rain days (67h) · 212 sun hours · 59% humidity · Peak crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 7 (high)
July
9/1013–23°C · 6 rain days (70h) · 201 sun hours · 65% humidity · Quiet crowd · UV 4 (moderate)
May
8/1014–23°C · 10 rain days (129h) · 191 sun hours · 69% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
Every month
Show the other 9 months in detail
January
2/1022–31°C (feels 35°C) · 16 rain days (189h) · 255 sun hours · 64% humidity · Moderate crowd · UV 12 (extreme) · sunniest 1 in 10 days reach 13 (extreme)
February
3/1021–31°C (feels 34°C) · 11 rain days (122h) · 237 sun hours · 60% humidity · Moderate crowd · UV 11 (very high) · sunniest 1 in 10 days reach 13 (extreme)
March
4/1021–30°C (feels 34°C) · 12 rain days (126h) · 247 sun hours · 62% humidity · Quiet crowd · UV 10 (very high) · sunniest 1 in 10 days reach 12 (extreme)
April
7/1018–27°C (feels 29°C) · 9 rain days (94h) · 209 sun hours · 64% humidity · Quiet crowd · UV 7 (high) · sunniest 1 in 10 days reach 9 (very high)
June
8/1014–23°C · 10 rain days (123h) · 181 sun hours · 72% humidity · Quiet crowd · UV 4 (moderate)
September
7/1017–28°C (feels 29°C) · 8 rain days (90h) · 203 sun hours · 59% humidity · Moderate crowd · UV 7 (high) · sunniest 1 in 10 days reach 10 (very high)
October
5/1019–29°C (feels 31°C) · 13 rain days (149h) · 223 sun hours · 63% humidity · Busy crowd · UV 8 (very high) · sunniest 1 in 10 days reach 12 (extreme)
November
5/1020–30°C (feels 32°C) · 11 rain days (108h) · 244 sun hours · 56% humidity · Peak crowd · UV 10 (very high) · sunniest 1 in 10 days reach 13 (extreme)
December
3/1021–31°C (feels 35°C) · 13 rain days (137h) · 263 sun hours · 58% humidity · Peak crowd · UV 11 (very high) · sunniest 1 in 10 days reach 14 (extreme)
Frequently asked questions about visiting Iguazu Falls
When is the best time to visit Iguazu Falls?
August is the highest-scoring month (9/10 on the Holiday Climate Index). Typical conditions: 15–25°C (6 rainy days). The top three months by score are August, July, May.
What is the worst time to visit Iguazu Falls?
January is the lowest-scoring month (2/10, capped by extreme heat). Typical conditions: 22–31°C (16 rainy days).
Is Iguazu Falls too hot in summer?
6 months (January, February, March, October, November, December) trip the heat deal-breaker in our scoring: apparent temperature crosses the comfort cap, so even with clear skies and low rain the score is held down. Plan around it if heat tolerance is low.
When are crowds lowest in Iguazu Falls?
Search-interest seasonality (Google Trends 2021-2025) is lowest in May and peaks in November. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.
Which months in Iguazu Falls have good weather but fewer tourists?
July (climate 9/10, crowd index 20) and May (climate 8/10, crowd index 0) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Iguazu Falls by month?
UV peaks at 12 (extreme) in January and is lowest in June at 4 (moderate). Monthly peak values: Jan 12, Feb 11, Mar 10, Apr 7, May 5, Jun 4, Jul 4, Aug 6, Sep 7, Oct 8, Nov 10, Dec 11. January, February, March, October, November, December reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.
What is the UV index in Iguazu Falls in January?
January is the peak UV month in Iguazu Falls, with a daily-peak UV index of 12 (extreme). At this level, sunburn can occur in under 20 minutes on unprotected fair skin. Apply SPF 50+, wear protective clothing and a hat, and avoid direct midday sun (11:00–17:00).
How high can UV get in Iguazu Falls on the sunniest days?
Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. December is the worst case: typical days average UV 11 (very high), but the top 10% of days reach UV 14 (extreme) — and even higher. Months where the sunniest days routinely exceed the typical reading: January, February, March, April, May, August, September, October, November, December. Plan sun protection for the worst case, not the average.
Is air quality in Iguazu Falls bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 2 months: September, October. The worst month is September with a typical-day mean of 14 µg/m³ (moderate); on the worst 10% of days PM2.5 reaches 35 µg/m³ (unhealthy) and higher. People with asthma, heart conditions, or sensitive children may want to avoid these months or limit outdoor activity. Source: CAMS via Open-Meteo.