Iguazu Falls · Month comparison

April vs May

May ranks #1 overall vs April at #3. Shoulder month: pleasantly cool (23C/13C), 30% off summer hotel rates, river flow tapering but still strong.

April clear-sky view of Iguazu Falls from Argentine Upper Trail

April

#3 of 12 months

Best match

Possibly the year's best month — perfect 27C/17C temperatures, post-rainy flow still huge, Easter aside crowds drop.

  • ↑Lowered humidity makes the Upper Trail and San Martin Island walks comfortable
  • ↑Water flow still 50% above dry-season minimum
May cooler-light Iguazu Falls Devil's Throat from above

May

#1 of 12 months

Best match

Shoulder month: pleasantly cool (23C/13C), 30% off summer hotel rates, river flow tapering but still strong.

  • ↑Hotel Loi Suites Iguazu from USD 180 vs USD 280+ in January
  • ↑Argentine Park Upper Trail cool enough for full-day walking
FactorAprilMay
Weather score
8
8
Value score
7
8
Crowd score
6
7
Events score
4
4
Atmosphere
9
8
Avg high temp27°C23°C
Monthly rain110mm110mm
Daily sunshine7hrs6hrs

April trade-offs

  • ↓Easter (Semana Santa) week — Argentine domestic tourist spike
  • ↓Mosquitos still active (use DEET)
  • ↓Some Brazilian-side rapids tours run reduced schedules

May trade-offs

  • ↓Evenings can drop to 10C — bring layers
  • ↓Some cataracts already visibly thinning vs Feb
  • ↓Boat tours (Macuco) suspend on cold/cloudy days
See all 12 months for Iguazu Falls →April in detail →May in detail →
Scores compare months within Iguazu Falls. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →