São Mateus do Sul weather in January

In January, São Mateus do Sul sees average daytime highs of 27°C and overnight lows near 18°C, with 184 mm of rain across 21.2 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 11% of the time in January, and the air most often feels muggy.

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 São Mateus do Sul's 11th-clearest and 8th-windiest month. For the whole year in context, see São Mateus do Sul's year-round climate.

Daytime high
27°
1st warmest
Overnight low
18°
12th coldest
Rainfall
184 mm
21.2 wet days
Daylight
13 h 30 min
6:47 AM – 8:14 PM
Cloud cover
74%
11th clearest
Wind
9 km/h
8th windiest
Solar energy
5.48 kWh/m²
Travel score
4.7
out of 10

São Mateus do Sul is 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 27°C through the month.

A typical January day in São Mateus do Sul reaches about 27°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, January runs on par with December and on par with February.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12718
22718
32718
42718
52718
62718
72718
82718
92718
102718
112718
122718
132718
142718
152718
162718
172718
182718
192718
202718
212718
222718
232718
242718
252718
262718
272718
282718
292718
302718
312718

São Mateus do Sul weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 18°18421.213.44.7
Feb27° / 18°15719.112.94.8
Mar26° / 17°10814.512.25.8
Apr24° / 15°769.311.46.8
May21° / 12°1059.210.86.5
Jun20° / 10°1099.110.46.3
Jul20° / 858.310.56.5
Aug22° / 10°857.711.17.1
Sep23° / 12°1401111.86.5
Oct24° / 14°15015.212.65.9
Nov25° / 16°1231413.36.0
Dec27° / 17°14417.213.65.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 18% of January, with mostly cloudy or overcast conditions the remaining 72%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22773
32773
42773
52773
62872
72872
82872
92872
102971
112971
122971
132971
142971
152872
162872
172872
182872
192872
202872
212872
222872
232872
242872
252872
262872
272872
282971
292971
302971
313070

Chance of precipitation in January

Any precipitation

São Mateus do Sul gets around 184 mm of rain over 21.2 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 67% and peaks near 69% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
164
265
365
466
567
668
768
869
969
1069
1169
1269
1369
1468
1568
1668
1767
1867
1967
2067
2167
2267
2367
2467
2567
2667
2767
2867
2967
3067
3167

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 56% of days. Sticky, muggy-or-worse air turns up on roughly 57% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121331531
221331531
321231541
421131551
521132541
621032551
72933551
82933551
92834551
102834551
112834551
122834551
132834551
142834551
152934541
161934551
171934551
1811034541
1911034550
2011033560
2111133550
2211132560
2311132560
2411131570
2511131570
2611030590
2711030590
2801030591
290930601
300929611
310929611

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 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 6:37 AM to 6:58 AM, and sunset from 8:12 PM to 8:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.66:378:12
213.66:388:13
313.66:388:13
413.66:398:13
513.66:398:13
613.66:408:14
713.56:418:14
813.56:428:14
913.56:428:14
1013.56:438:14
1113.56:448:14
1213.56:448:14
1313.56:458:14
1413.56:468:14
1513.56:468:14
1613.56:478:14
1713.46:488:14
1813.46:498:14
1913.46:498:14
2013.46:508:14
2113.46:518:14
2213.46:528:14
2313.46:528:14
2413.36:538:13
2513.36:548:13
2613.36:558:13
2713.36:558:13
2813.36:568:12
2913.36:578:12
3013.26:588:12
3113.26:588:11

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.48 kWh/m².

For context, solar energy here swings from a low near 2.78 kWh/m² to a high of 5.75 kWh/m² in December across the year — January's 5.48 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in January

Is January a good time to visit São Mateus do Sul?

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

4.7
Sightseeing
12th-best month of the year
4.9
Beach & pool
7th-best month of the year

January is a reasonable time to visit São Mateus do Sul for sightseeing.

What to pack for São Mateus do Sul in January

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

In January, São Mateus do Sul sees daytime highs around 27°C and nights near 18°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in São Mateus do Sul 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 São Mateus do Sul 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 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 19UV 15Jul 12UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5High
Jul5High
Aug6High
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in São Mateus do Sul 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 São Mateus do Sul is worst in September — around 16 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1315 µg/m³Dec 197 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar7Good
Apr8Good
May9Good
Jun8Good
Jul10Good
Aug13Moderate
Sep16Moderate
Oct10Good
Nov8Good
Dec7Good
Location & terrain

Where is São Mateus do Sul?

São Mateus do Sul sits at 25.9°S, 50.4°W, 792 m above sea level, in Brazil. The nearest listed city is Três Barras, 27 km away.

Topography around São Mateus do Sul

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Mateus do Sul.

Within 3 km, the terrain around São Mateus do Sul has only modest variations in elevation — a maximum elevation change of 80 m around an average of 775 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 159 m; within 80 km, large variations in elevation — a maximum elevation change of 879 m.

The land around São Mateus do Sul is covered by trees (40%), grassland (22%) and artificial surfaces (20%) within 3 km, trees (56%) and cropland (32%) within 16 km, and trees (60%) and cropland (33%) within 80 km.

3 km
80 m
16 km
159 m
80 km
879 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Três Barras 27 km · Canoinhas 34 km · Irati 53 km · Papanduva 60 km · Palmeira 62 km · Mafra 63 km · Rio Negro 64 km · Lapa 68 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 São Mateus do Sul (-25.8742°, -50.3828°, elevation 792 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).