Iguazu weather in January

In January, Iguazu sees average daytime highs of 31°C and overnight lows near 22°C, with 157 mm of rain across 15.3 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 34% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 13 h 36 min at the start of January to 13 h 12 min by month's end. Set against the rest of the year, January is Iguazu's 12th-clearest and 10th-windiest month. For the whole year in context, see Iguazu's year-round climate.

Daytime high
31°
1st warmest
Overnight low
22°
12th coldest
Rainfall
157 mm
15.3 wet days
Daylight
13 h 24 min
6:05 AM – 7:31 PM
Cloud cover
58%
12th clearest
Wind
8 km/h
10th windiest
Solar energy
6.33 kWh/m²
Travel score
3.9
out of 10

Iguazu is human settlement.

Founded
1902

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical January day in Iguazu reaches about 31°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°C. Set against its neighbours, January runs on par with December and on par with February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113122
123122
133122
143122
153122
163122
173122
183122
193122
203122
213122
223122
233122
243122
253122
263122
273122
283122
293122
303122
313122

How January really feels in Iguazu

Once humidity and wind are folded in, January averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Iguazu weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°15715.313.43.9
Feb31° / 22°1511412.94.1
Mar30° / 21°14112.512.24.8
Apr28° / 18°1389.411.46.3
May24° / 15°1629.110.87.1
Jun22° / 14°1379.210.46.9
Jul22° / 13°1188.510.67.2
Aug25° / 14°94711.17.7
Sep27° / 16°1559.911.86.7
Oct28° / 19°19713.212.65.5
Nov30° / 20°15811.713.35.0
Dec31° / 21°18414.813.64.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24951
34951
44852
54852
64951
74951
84951
95050
105050
115050
125050
135050
145050
155050
165050
175050
185050
195149
205149
215248
225248
235248
245149
255248
265248
275248
285347
295347
305446
315446

Chance of precipitation in January

Any precipitation

Iguazu gets around 157 mm of rain over 15.3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 50% and peaks near 52% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
151
252
352
452
552
652
752
852
952
1052
1152
1252
1352
1452
1551
1651
1750
1850
1949
2048
2148
2248
2347
2447
2547
2648
2748
2848
2948
3048
3148

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the oppressive band about 67% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11725634
21725634
31725625
41625635
51625635
61625635
71625635
81625635
91625635
101625635
111625644
121524664
131524664
141524664
151524673
161524673
171524673
181523692
191523692
201523692
211523692
221523692
230623692
240622702
250622702
260622711
270622711
280623701
290623701
300623701
310623692

Wind in January

Winds average 8 km/h in January.

Across January, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 13 h 36 min at the start of January to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over January. Sunrise moves from 5:54 AM to 6:16 AM, and sunset from 7:29 PM to 7:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:547:29
213.65:557:29
313.65:567:29
413.65:567:29
513.55:577:30
613.55:577:30
713.55:587:30
813.55:597:30
913.56:007:30
1013.56:007:30
1113.56:017:31
1213.56:027:31
1313.56:027:31
1413.56:037:31
1513.46:047:31
1613.46:057:31
1713.46:057:31
1813.46:067:31
1913.46:077:30
2013.46:077:30
2113.46:087:30
2213.46:097:30
2313.36:107:30
2413.36:107:30
2513.36:117:29
2613.36:127:29
2713.36:137:29
2813.36:137:29
2913.26:147:28
3013.26:157:28
3113.26:167:28

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 6.33 kWh/m².

For context, solar energy here swings from a low near 2.83 kWh/m² to a high of 6.38 kWh/m² in December across the year — January's 6.33 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.1Intense
316.1Intense
Planning a trip in January

Is January a good time to visit Iguazu?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.9
Sightseeing
12th-best month of the year
5.8
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Iguazu.

What to pack for Iguazu in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Iguazu sees daytime highs around 31°C and nights near 22°C. Pack light clothes, rain gear and sun protection. About 15 days see rain.

light clothesrain gearsun protection

UV index in Iguazu in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iguazu peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighHighVery highExtremeJan 19UV 15Jul 12UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar11Extreme
Apr9Very high
May6High
Jun5High
Jul5Moderate
Aug6High
Sep6High
Oct10Very high
Nov12Extreme
Dec13Extreme

Air quality in Iguazu in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Iguazu is worst in September — around 23 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (March, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1622 µg/m³Mar 108 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr9Good
May10Good
Jun10Good
Jul11Good
Aug14Moderate
Sep23Moderate
Oct14Moderate
Nov10Good
Dec8Good
Location & terrain

Where is Iguazu?

Iguazu sits at 25.6°S, 54.6°W, 177 m above sea level, in Argentina. The nearest listed city is Presidente Franco, 5.0 km away.

Topography around Iguazu

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Iguazu.

Within 3 km, the terrain around Iguazu has only modest variations in elevation — a maximum elevation change of 139 m around an average of 175 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 198 m; within 80 km, significant variations in elevation — a maximum elevation change of 568 m.

The land around Iguazu is covered by trees (50%) and artificial surfaces (30%) within 3 km, trees (52%) and cropland (22%) within 16 km, and trees (46%) and cropland (38%) within 80 km.

3 km
139 m
16 km
198 m
80 km
568 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Presidente Franco 5.0 km · Foz do Iguacu 6.0 km · Ciudad del Este 13 km · Santa Terezinha de Itaipu 25 km · Colonia Wanda 42 km · São Miguel do Iguaçu 44 km · Puerto Esperanza 47 km · Medianeira 59 km

Argentina travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / I
220 V · 50 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$14,898
2025
Happiness
6.4 / 10
World Happiness, 2025
Homicide rate
4.5
per 100k, 2023
Road deaths
14.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 575
Religion
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus Christ 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Iguazu (-25.5991°, -54.5735°, elevation 177 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).