January in Iguazu Falls — workable with trade-offs
Trade-offs · 5.7/10Days in January average 26°C (79°F) and humidity near 75% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
198 mm of rain makes this a wet month here, though with about 29 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 5.7/10 on the same scale — 12th of 12 months, versus 8.7/10 for the best month here.
Budget for low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, August is materially better in Iguazu Falls — 3 points higher on the same scale.
February in Iguazu Falls — workable with trade-offs
Trade-offs · 6.3/10Trail conditions at 26°C (78°F) favour early starts and shaded routes in February; midday is for water breaks, not for exposed climbs.
134 mm of rain makes this a wet month here, though with about 27 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 6.3/10 on the same scale — 9th of 12 months, versus 8.7/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, August is materially better in Iguazu Falls — 2.4 points higher on the same scale.
March in Iguazu Falls: mixed conditions, plan around the weather
Trade-offs · 6.2/10March averages 25°C (77°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
Monthly rainfall reaches 169 mm — wet for this destination — but about 29 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 6.2/10 here, 10th of 12 months, against 8.7/10 in the destination's best month.
Plan for low-season pricing, with crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
Flexible dates? August scores 2.5 points higher here — enough to change the trip.
April in Iguazu Falls: strong conditions, 4th of 12
Good · 7.6/10Trail conditions at 22°C (72°F) favour early starts and shaded routes in April; midday is for water breaks, not for exposed climbs.
149 mm of rain makes this a wet month here, though with about 25 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.6/10 on the same scale — 4th of 12 months, versus 8.7/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
May in Iguazu Falls — reliably good (5th best month)
Good · 7.4/10May averages 19°C (66°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Monthly rainfall reaches 165 mm — wet for this destination — but about 24 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 7.4/10 here, 5th of 12 months, against 8.7/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella, footwear you can get muddy.
June in Iguazu Falls — reliably good (7th best month)
Good · 7.3/10Temperatures hover around 17°C (63°F) — the kind of month where neither heat nor cold forces the schedule.
165 mm of rain makes this a wet month here, though with about 22 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.3/10 on the same scale — 7th of 12 months, versus 8.7/10 for the best month here.
Budget for mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella, footwear you can get muddy.
July in Iguazu Falls: strong conditions, 2nd of 12
Good · 8.4/10Temperatures hover around 17°C (63°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 81 mm of rain this month — a flexible day or two helps — with about 26 days with 6+ hours of sunshine and 10.7 hours of daylight to work around it.
That is 8.4/10 on the same scale — 2nd of 12 months, versus 8.7/10 for the best month here.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer, footwear you can get muddy.
August: the best month of the year in Iguazu Falls
Best window · 8.7/10August averages 19°C (66°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 80 mm, so plan one flexible day in three; you still get about 26 days with 6+ hours of sunshine and 11.2 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Iguazu Falls at 8.7/10 — the reference point every other month on this page is measured against.
Plan for peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer, footwear you can get muddy.
September in Iguazu Falls — reliably good (3rd best month)
Good · 8.1/10September averages 22°C (71°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
Monthly rainfall reaches 135 mm — wet for this destination — but about 25 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 8.1/10 here, 3rd of 12 months, against 8.7/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
October holds up well in Iguazu Falls — 6th best month
Good · 7.4/10Trail conditions at 22°C (72°F) favour early starts and shaded routes in October; midday is for water breaks, not for exposed climbs.
This is the year's wettest stretch at 289 mm, but with about 23 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 7.4/10 on the same scale — 6th of 12 months, versus 8.7/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
November holds up well in Iguazu Falls — 8th best month
Good · 7/10Trail conditions at 24°C (75°F) favour early starts and shaded routes in November; midday is for water breaks, not for exposed climbs.
160 mm of rain makes this a wet month here, though with about 28 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7/10 on the same scale — 8th of 12 months, versus 8.7/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, August is materially better in Iguazu Falls — 1.7 points higher on the same scale.
December in Iguazu Falls — middling scores, decent value
Trade-offs · 6.2/10December averages 26°C (78°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
Monthly rainfall reaches 160 mm — wet for this destination — but about 29 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 6.2/10 here, 11th of 12 months, against 8.7/10 in the destination's best month.
Figure on mid-season pricing, with crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
Flexible dates? August scores 2.5 points higher here — enough to change the trip.
