August clear-weather panorama of Iguazu Falls from Brazilian side

Best time to visit Iguazu Falls for good weather

When is the best weather in Iguazu Falls? Monthly breakdown of temperature, rainfall, and sunshine hours — ranked by what actually matters for your trip.

Best month

August

Driest month with stable clear weather — water at minimum but viewing conditions ideal.

Driest month of year — boardwalks consistently open

Dry low water reveals river bed and rapids upstream

Hotel rates back to shoulder-season — Iguazu Grand from USD 220

All months ranked — Good weather

August

Best match

Driest month with stable clear weather — water at minimum but viewing conditions ideal.

#1 for good weather

May

Best match

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

#2 for good weather

September

Best match

Spring rains return and water levels start rebuilding — strong shoulder month with low crowds.

#3 for good weather

April

Best match

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

#4 for good weather

October

Strong option

Wet season starts in earnest — water flow climbs sharply and the jungle re-greens after dry winter.

#5 for good weather

November

Strong option

Final quiet month before summer holiday rush — rain heavy but volume of falls building dramatically.

#6 for good weather

March

Strong option

Post-summer sweet spot: still-impressive water flow, fewer crowds, temperatures sliding off summer peak.

#7 for good weather

June

Strong option

Southern winter school holidays mid-month bring Argentine and Brazilian families back — book accommodation early.

#8 for good weather

July

Strong option

Dry-season winter peak: cool clear days, lowest water flow visibly, school-holiday crowds at maximum.

#9 for good weather

December

Worth considering

Christmas-New-Year crush — Brazilian and Argentine domestic tourists hit peak alongside maximum water and humidity.

#10 for good weather

February

Worth considering

Carnaval week (mid-Feb) pulls Brazilian visitors to Foz; otherwise the wettest, hottest month.

#11 for good weather

January

Worth considering

Southern summer school holidays + monsoon water volume — Devil's Throat is a roaring wall of mist.

#12 for good weather

Other priorities for Iguazu Falls

Good weather in other destinations

Scores are directional — designed to compare months within Iguazu Falls, not to make precise claims. Full methodology →