Mongaguá weather in January

In January, Mongaguá sees average daytime highs of 29°C and overnight lows near 23°C, with 334 mm of rain across 25.9 wet days and about 13.3 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 7% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 13 h 30 min at the start of January to 13 h 06 min by month's end. Set against the rest of the year, January is Mongaguá's 11th-clearest and 9th-windiest month. For the whole year in context, see Mongaguá's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
23°
12th coldest
Rainfall
334 mm
25.9 wet days
Daylight
13 h 18 min
6:36 AM – 7:56 PM
Cloud cover
80%
11th clearest
Wind
7 km/h
9th windiest
Solar energy
5.64 kWh/m²
Travel score
3.5
out of 10

Mongaguá 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 29°C through the month.

A typical January day in Mongaguá reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°C. Set against its neighbours, January runs about 1°C warmer than December and on par with February.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12922
22922
32922
42922
52922
62922
72922
82923
92923
102923
112923
122923
132923
142923
152923
162923
172923
182923
192923
202923
212923
222923
232923
242923
252923
262923
272923
282923
292923
302923
312923

How January really feels in Mongaguá

Once humidity and wind are folded in, January averages 11 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
11
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.

Mongaguá weather by month

How January compares with the rest of the year at a glance. January is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 23°33425.913.33.5
Feb29° / 23°30022.212.83.5
Mar28° / 22°27424.212.24.0
Apr27° / 20°13114.911.55.6
May25° / 18°10512.410.96.5
Jun24° / 16°779.110.57.1
Jul23° / 15°879.210.77.2
Aug24° / 16°719.311.27.1
Sep24° / 17°1251411.96.2
Oct25° / 19°15317.112.65.4
Nov26° / 20°19019.113.24.9
Dec28° / 22°23522.413.54.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 81%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21783
31684
41684
51684
61684
71684
81684
91684
101684
111783
121783
131882
141882
151882
161882
171882
181882
191981
201981
212080
222080
232080
242179
252278
262278
272278
282377
292476
302476
312575

Chance of precipitation in January

Any precipitation

Mongaguá gets around 334 mm of rain over 25.9 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 82% and peaks near 83% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
179
280
380
481
581
682
782
882
982
1082
1182
1282
1383
1483
1583
1683
1783
1883
1983
2083
2183
2283
2383
2483
2583
2683
2783
2882
2982
3081
3181

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 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1322678
2322678
3321679
4321679
53216610
63216610
72206711
82206711
92206711
102206612
112206612
122206612
132206513
142206513
152206513
162216413
172216413
182216413
192206513
202206513
212206513
222196613
232196514
242186614
252186614
262176714
272176615
282166715
292166715
302166616
312156716

Wind in January

Winds average 7 km/h in January.

Across January, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 13 h 30 min at the start of January to 13 h 06 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 6:26 AM to 6:46 AM, and sunset from 7:54 PM to 7:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.56:267:54
213.56:267:54
313.56:277:54
413.46:287:54
513.46:287:55
613.46:297:55
713.46:297:55
813.46:307:55
913.46:317:55
1013.46:317:56
1113.46:327:56
1213.46:337:56
1313.46:347:56
1413.46:347:56
1513.46:357:56
1613.36:367:56
1713.36:367:56
1813.36:377:56
1913.36:387:56
2013.36:387:56
2113.36:397:56
2213.36:407:56
2313.26:417:55
2413.26:417:55
2513.26:427:55
2613.26:437:55
2713.26:437:55
2813.26:447:54
2913.26:457:54
3013.16:467:54
3113.16:467:53

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.64 kWh/m².

For context, solar energy here swings from a low near 3.13 kWh/m² to a high of 5.91 kWh/m² in December across the year — January's 5.64 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in January

Hazard calendar for Mongaguá

In seasonPeak

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

Mongaguá's rainy season runs October–March, when most of the year's rain falls.

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

Is January a good time to visit Mongaguá?

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

3.5
Sightseeing
11th-best month of the year
4.4
Beach & pool
12th-best month of the year

January is a weaker month for outdoor sightseeing in Mongaguá.

What to pack for Mongaguá in January

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

In January, Mongaguá sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

Sea temperature near Mongaguá 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 offshore is warmest in February at about 27°C and coldest in August near 20°C.

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

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Refreshing
Jun22Refreshing
Jul21Refreshing
Aug20Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Mongaguá 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 Mongaguá peaks around January 23 at about 14 (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 23UV 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar9Very high
Apr8Very high
May7High
Jun6High
Jul5Moderate
Aug7High
Sep7Very high
Oct10Extreme
Nov13Extreme
Dec13Extreme

Air quality in Mongaguá 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 Mongaguá is worst in July — around 52 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (February, 24 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateJul 1451 µg/m³Feb 1225 µg/m³
PM2.5 (µg/m³)Level
Jan25Moderate
Feb24Moderate
Mar26Moderate
Apr28Moderate
May36Poor
Jun49Poor
Jul52Poor
Aug47Poor
Sep41Poor
Oct31Moderate
Nov25Moderate
Dec26Moderate
Location & terrain

Where is Mongaguá?

Mongaguá sits at 24.1°S, 46.6°W, 8 m above sea level, in Brazil. The nearest listed city is Itanhaém, 20 km away.

Topography around Mongaguá

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

Within 3 km, the terrain around Mongaguá has significant variations in elevation — a maximum elevation change of 472 m around an average of 60 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,055 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,404 m.

The land around Mongaguá is covered by water (42%) and trees (41%) within 3 km, water (48%) and trees (46%) within 16 km, and water (44%) and trees (42%) within 80 km.

3 km
472 m
16 km
1,055 m
80 km
1,404 m
treesgrasslandartificial surfacesbare terrainwaterwetlandmangroves
January weather nearby: Itanhaém 20 km · Praia Grande 24 km · São Vicente 27 km · Cubatão 30 km · Parelheiros 31 km · Santos 33 km · Embu-Guaçu 35 km · Grajaú 36 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 Mongaguá (-24.0931°, -46.6208°, elevation 8 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).