Iaçu weather in January

In January, Iaçu sees average daytime highs of 32°C and overnight lows near 22°C, with 56 mm of rain across 6.6 wet days and about 12.7 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 26% of the time in January, and the air most often feels muggy.

Daylight stretches from about 12 h 42 min at the start of January to 12 h 36 min by month's end. Set against the rest of the year, January is Iaçu's 7th-clearest and 7th-windiest month. For the whole year in context, see Iaçu's year-round climate.

Daytime high
32°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
56 mm
6.6 wet days
Daylight
12 h 42 min
5:30 AM – 6:10 PM
Cloud cover
62%
7th clearest
Wind
9 km/h
7th windiest
Solar energy
6.01 kWh/m²
Travel score
4.0
out of 10

Iaçu is human settlement in Brazil.

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 32°C through the month.

A typical January day in Iaçu reaches about 32°C in the afternoon and slips back to 22°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 35°C. Set against its neighbours, January runs on par with December and on par with February.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13222
23222
33222
43222
53222
63222
73222
83222
93222
103222
113222
123222
133222
143222
153222
163222
173222
183222
193222
203222
213222
223322
233322
243322
253322
263322
273322
283322
293322
303322
313322

How January really feels in Iaçu

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.

Iaçu weather by month

How January compares with the rest of the year at a glance. January is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 22°566.612.74.0
Feb33° / 22°376.112.43.8
Mar33° / 22°538.112.13.9
Apr31° / 22°377.111.74.5
May30° / 21°185.111.45.4
Jun29° / 19°144.611.36.2
Jul28° / 18°144.811.36.6
Aug29° / 18°113.711.66.3
Sep30° / 19°112.511.95.6
Oct32° / 21°21412.34.7
Nov32° / 22°537.112.64.3
Dec32° / 22°556.612.74.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 23% of January, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25050
35050
45050
55050
65050
74951
84951
94951
104852
114753
124852
134852
144753
154753
164753
174852
184852
194852
204852
214951
224951
235149
245248
255248
265347
275347
285446
295446
305545
315545

Chance of precipitation in January

Any precipitation

Iaçu gets around 56 mm of rain over 6.6 wet days in January, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 22% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
119
220
320
420
520
621
721
821
921
1022
1122
1222
1323
1423
1523
1623
1723
1823
1923
2023
2123
2223
2322
2422
2522
2622
2722
2822
2922
3021
3121

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 77% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
198011
298011
388111
488111
588111
688111
788012
897912
997912
1097813
11107713
12107614
13107614
14107515
15107515
16107416
17107317
18107317
19107317
20107218
21107218
22107317
23107317
24107317
2597516
2697516
2797615
2887715
2987814
3087814
3187913

Wind in January

Winds average 9 km/h in January.

Across January, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 12 h 42 min at the start of January to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over January. Sunrise moves from 5:22 AM to 5:37 AM, and sunset from 6:06 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:226:06
212.75:226:07
312.75:236:07
412.75:236:07
512.75:246:08
612.75:246:08
712.75:256:08
812.75:266:09
912.75:266:09
1012.75:276:09
1112.75:276:09
1212.75:286:10
1312.75:286:10
1412.75:296:10
1512.75:296:10
1612.75:306:10
1712.75:306:11
1812.75:316:11
1912.75:316:11
2012.75:326:11
2112.65:326:11
2212.65:336:11
2312.65:336:11
2412.65:346:11
2512.65:346:11
2612.65:356:11
2712.65:356:11
2812.65:366:11
2912.65:366:11
3012.65:376:11
3112.65:376:11

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 6.01 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.52 kWh/m² to a high of 6.01 kWh/m² in January across the year — January's 6.01 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.0Intense
36.0Intense
46.0Intense
56.0Intense
66.0Intense
76.0Intense
86.0Intense
96.0Intense
106.0Bright
116.0Bright
126.0Bright
136.0Bright
146.0Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Bright
256.0Bright
266.0Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
316.0Intense
Planning a trip in January

Is January a good time to visit Iaçu?

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

4.0
Sightseeing
10th-best month of the year
6.7
Beach & pool
10th-best month of the year

January is a reasonable time to visit Iaçu for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Iaçu in January

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

In January, Iaçu sees daytime highs around 32°C and nights near 22°C. Pack light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in Iaçu in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iaçu peaks around February 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 17UV 15Jul 10UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun9Very high
Jul9Very high
Aug10Extreme
Sep11Extreme
Oct13Extreme
Nov13Extreme
Dec12Extreme
Location & terrain

Where is Iaçu?

Iaçu sits at 12.8°S, 40.2°W, 240 m above sea level, in Brazil. The nearest listed city is Itaberaba, 29 km away.

Topography around Iaçu

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

Within 3 km, the terrain around Iaçu has only modest variations in elevation — a maximum elevation change of 228 m around an average of 251 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 598 m; within 80 km, large variations in elevation — a maximum elevation change of 928 m.

The land around Iaçu is covered by grassland (61%) within 3 km, grassland (67%) within 16 km, and grassland (58%) and trees (27%) within 80 km.

3 km
228 m
16 km
598 m
80 km
928 m
treesshrubsgrasslandcroplandartificial surfaceswater
January weather nearby: Itaberaba 29 km · Boa Vista do Tupim 44 km · Itatim 56 km · Ruy Barbosa 62 km · Amargosa 72 km · Maracás 79 km · Ubaíra 81 km · Castro Alves 85 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Iaçu (-12.7672°, -40.2117°, elevation 240 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).