São Mateus weather in January

In January, São Mateus sees average daytime highs of 28°C and overnight lows near 24°C, with 106 mm of rain across 13.4 wet days and about 13 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 40% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 13 h 06 min at the start of January to 12 h 48 min by month's end. Set against the rest of the year, January is São Mateus's 10th-clearest and 5th-windiest month. For the whole year in context, see São Mateus's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
24°
11th coldest
Rainfall
106 mm
13.4 wet days
Daylight
13 hours
6:18 AM – 7:19 PM
Cloud cover
58%
10th clearest
Wind
18 km/h
5th windiest
Solar energy
6.76 kWh/m²
Travel score
5.9
out of 10

São Mateus 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 28°C through the month.

A typical January day in São Mateus reaches about 28°C in the afternoon and slips back to 24°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, January runs on par with December and on par with February.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12824
22824
32824
42824
52824
62824
72824
82824
92824
102824
112824
122824
132824
142824
152824
162824
172824
182824
192824
202824
212824
222824
232824
242824
252824
262824
272824
282824
292824
302824
312824

São Mateus weather by month

How January compares with the rest of the year at a glance. January is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°10613.4135.9
Feb28° / 24°7613.912.65.4
Mar28° / 24°13618.212.15.2
Apr27° / 24°10816.911.65.6
May26° / 22°7013.211.16.4
Jun25° / 21°5211.810.96.8
Jul24° / 21°5713.2116.8
Aug24° / 21°4811.211.47.1
Sep25° / 22°5410.811.96.9
Oct26° / 23°9613.412.46.2
Nov26° / 23°18317.612.95.3
Dec27° / 24°14715.513.15.5

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% 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 50%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24555
34654
44456
54456
64555
74555
84654
94654
104753
114753
124951
135050
145050
155149
165149
175347
185347
195347
205347
215347
225347
235347
245347
255446
265446
275446
285446
295545
305545
315644

Chance of precipitation in January

Any precipitation

São Mateus gets around 106 mm of rain over 13.4 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 44% and peaks near 46% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
143
243
344
444
544
644
744
844
944
1044
1143
1243
1343
1443
1543
1643
1743
1843
1943
2043
2143
2243
2343
2444
2544
2645
2745
2846
2946
3046
3146

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 91% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
13925
23916
33916
43916
53907
63907
72917
82908
92908
102908
112908
121918
131918
141918
151918
161909
171909
181909
191909
201918
211918
221918
231918
241927
251927
261927
271927
281927
291918
301918
311918

Wind in January

Winds average 18 km/h in January.

Across January, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 13 h 06 min at the start of January to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over January. Sunrise moves from 6:09 AM to 6:27 AM, and sunset from 7:16 PM to 7:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.16:097:16
213.16:107:16
313.16:117:16
413.16:117:17
513.16:127:17
613.16:127:17
713.16:137:18
813.16:137:18
913.16:147:18
1013.16:157:18
1113.16:157:18
1213.06:167:19
1313.06:177:19
1413.06:177:19
1513.06:187:19
1613.06:187:19
1713.06:197:19
1813.06:207:19
1913.06:207:19
2013.06:217:19
2113.06:217:19
2213.06:227:19
2312.96:237:19
2412.96:237:19
2512.96:247:19
2612.96:247:19
2712.96:257:19
2812.96:267:19
2912.96:267:19
3012.96:277:18
3112.86:277:18

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 6.76 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.83 kWh/m² to a high of 6.76 kWh/m² in January across the year — January's 6.76 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.8Intense
106.8Intense
116.8Intense
126.8Intense
136.8Intense
146.8Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.7Intense
316.7Intense
Planning a trip in January

Is January a good time to visit São Mateus?

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

5.9
Sightseeing
7th-best month of the year
6.3
Beach & pool
1st-best month of the year

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

What to pack for São Mateus in January

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

In January, São Mateus sees daytime highs around 28°C and nights near 24°C. Pack light clothes and sun protection. Worth having: rain gear. About 13 days see rain.

light clothessun protectionrain gear

Sea temperature near São Mateus in January

The nearest coast averages about 27°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 27 km away) is warmest in March at about 28°C and coldest in August near 24°C.

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

22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar28Warm
Apr27Warm
May26Warm
Jun25Warm
Jul24Warm
Aug24Warm
Sep25Warm
Oct25Warm
Nov26Warm
Dec26Warm

UV index in São Mateus 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 São Mateus peaks around February 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 13UV 14Jun 20UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is São Mateus?

São Mateus sits at 18.7°S, 39.9°W, 38 m above sea level, in Brazil. The nearest listed city is Conceição da Barra, 19 km away.

Topography around São Mateus

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

Within 3 km, the terrain around São Mateus has only modest variations in elevation — a maximum elevation change of 51 m around an average of 22 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 95 m; within 80 km, large variations in elevation — a maximum elevation change of 744 m.

The land around São Mateus is covered by trees (34%), artificial surfaces (26%) and grassland (21%) within 3 km, trees (55%) and grassland (26%) within 16 km, and grassland (37%), trees (33%) and water (27%) within 80 km.

3 km
51 m
16 km
95 m
80 km
744 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
January weather nearby: Conceição da Barra 19 km · Jaguaré 31 km · Pinheiros 54 km · Nova Venécia 57 km · Sooretama 59 km · Mucuri 78 km · Linhares 78 km · Rio Bananal 78 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 (-18.7201°, -39.8589°, elevation 38 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).