Chaves weather in January

In January, Chaves sees average daytime highs of 30°C and overnight lows near 24°C, with 310 mm of rain across 29.5 wet days and about 12 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 3% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of January to 12 hours by month's end. Set against the rest of the year, January is Chaves's 9th-clearest and 6th-windiest month. For the whole year in context, see Chaves's year-round climate.

Daytime high
30°
9th warmest
Overnight low
24°
6th coldest
Rainfall
310 mm
29.5 wet days
Daylight
12 hours
6:29 AM – 6:29 PM
Cloud cover
82%
9th clearest
Wind
9 km/h
6th windiest
Solar energy
4.25 kWh/m²
Travel score
2.8
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical January day in Chaves reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, January runs about 2°C cooler than December and on par with February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
152924
162924
172924
182924
192924
202924
212924
222924
232924
242924
252924
262924
272924
282924
292924
302924
312924

How January really feels in Chaves

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.

Chaves weather by month

How January compares with the rest of the year at a glance. January is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°31029.5122.8
Feb29° / 24°39127.3122.9
Mar29° / 24°44730.3122.8
Apr29° / 24°42329.4122.7
May30° / 24°33129.2122.8
Jun31° / 24°15825.3123.0
Jul31° / 24°12223.5123.3
Aug32° / 24°6118123.5
Sep32° / 24°3310.3123.9
Oct33° / 25°256.3124.0
Nov33° / 25°429123.8
Dec31° / 24°14321.9123.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 87%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
22080
31981
41882
51882
61783
71783
81684
91684
101585
111486
121486
131486
141387
151288
161288
171288
181288
191189
201189
211189
221189
231189
24991
25991
26991
27892
28892
29892
30793
31793

Chance of precipitation in January

Any precipitation

Chaves gets around 310 mm of rain over 29.5 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 95% and peaks near 96% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
191
292
393
493
594
695
795
895
996
1096
1196
1296
1396
1496
1596
1696
1796
1895
1995
2095
2195
2295
2395
2495
2594
2695
2795
2895
2995
3095
3195

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 66% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
15941
26040
36040
46139
56238
66238
76337
86337
96436
106436
116535
126535
136634
146733
156733
166832
176832
186832
196931
206931
216931
226931
236931
246931
257030
267030
277030
287030
297030
306931
316931

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 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
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 hours at the start of January to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over January. Sunrise moves from 6:23 AM to 6:33 AM, and sunset from 6:23 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:236:23
212.06:236:24
312.06:246:24
412.06:246:25
512.06:256:25
612.06:256:26
712.06:256:26
812.06:266:26
912.06:266:27
1012.06:276:27
1112.06:276:28
1212.06:286:28
1312.06:286:28
1412.06:286:29
1512.06:296:29
1612.06:296:29
1712.06:296:30
1812.06:306:30
1912.06:306:30
2012.06:306:31
2112.06:316:31
2212.06:316:31
2312.06:316:32
2412.06:316:32
2512.06:326:32
2612.06:326:32
2712.06:326:33
2812.06:326:33
2912.06:336:33
3012.06:336:33
3112.06:336:33

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.25 kWh/m².

For context, solar energy here swings from a low near 3.77 kWh/m² to a high of 6.26 kWh/m² in October across the year — January's 4.25 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.4Bright
54.4Bright
64.4Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.1Bright
314.1Bright
Planning a trip in January

Hazard calendar for Chaves

In seasonPeak

In January, Chaves sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Chaves's monsoon runs January–May, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Chaves?

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

2.8
Sightseeing
9th-best month of the year
3.8
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Chaves.

What to pack for Chaves in January

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

In January, Chaves sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. About 30 days see rain.

light clothesrain gear

Sea temperature near Chaves in January

The nearest coast averages about 29°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 13 km away) is warmest in October at about 30°C and coldest in March near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb28Tropical
Mar28Tropical
Apr28Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct30Tropical
Nov30Tropical
Dec29Tropical

UV index in Chaves 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 Chaves peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 11 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 13UV 15Aug 11UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Chaves 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 Chaves is worst in February — around 21 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (July, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2021 µg/m³Jul 177 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb21Moderate
Mar21Moderate
Apr17Moderate
May9Good
Jun7Good
Jul7Good
Aug7Good
Sep9Good
Oct12Good
Nov12Moderate
Dec14Moderate
Location & terrain

Where is Chaves?

Chaves sits at 0.2°S, 50.0°W, 0 m above sea level, in Brazil. The nearest listed city is Afuá, 44 km away.

Topography around Chaves

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

Within 3 km, the terrain around Chaves has only modest variations in elevation — a maximum elevation change of 25 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 32 m; within 80 km, only modest variations in elevation — a maximum elevation change of 39 m.

The land around Chaves is covered by water (55%) and trees (38%) within 3 km, water (44%) and trees (38%) within 16 km, and trees (54%) and water (27%) within 80 km.

3 km
25 m
16 km
32 m
80 km
39 m
treesgrasslandwaterwetland
January weather nearby: Afuá 44 km · Anajás 92 km · Macapá 122 km · Santana 133 km · Mazagão 145 km · Cachoeira do Arari 148 km · Soure 174 km · Muaná 175 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 Chaves (-0.16°, -49.9883°, elevation 0 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).