Porto Grande weather in January

In January, Porto Grande sees average daytime highs of 30°C and overnight lows near 23°C, with 193 mm of rain across 27.1 wet days and about 12 hours of daylight. It is the 8th-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 Porto Grande's 8th-clearest and 5th-windiest month. For the whole year in context, see Porto Grande's year-round climate.

Daytime high
30°
8th warmest
Overnight low
23°
9th coldest
Rainfall
193 mm
27.1 wet days
Daylight
12 hours
6:36 AM – 6:34 PM
Cloud cover
81%
8th clearest
Wind
9 km/h
5th windiest
Solar energy
3.96 kWh/m²
Travel score
2.9
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 Porto Grande reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C warmer than February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How January really feels in Porto Grande

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.

Porto Grande weather by month

How January compares with the rest of the year at a glance. January is the 8th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°19327.1122.9
Feb29° / 23°23924.9123.0
Mar30° / 23°25627.1123.0
Apr30° / 23°27128122.8
May30° / 23°24528.6122.8
Jun30° / 22°12725123.1
Jul31° / 22°9321.6123.5
Aug32° / 23°4212123.9
Sep34° / 23°174.3123.6
Oct35° / 23°153.4123.1
Nov34° / 23°316.6123.0
Dec32° / 23°10419.5123.0

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 12% of January, with mostly cloudy or overcast conditions the remaining 85%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22278
32278
42278
52179
62080
71981
81981
91981
101783
111684
121684
131585
141585
151387
161288
171288
181189
191189
201288
211288
221189
231189
241189
251090
261090
271090
281090
291090
301090
311090

Chance of precipitation in January

Any precipitation

Porto Grande gets around 193 mm of rain over 27.1 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 87% and peaks near 88% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
185
286
386
486
587
687
787
887
988
1088
1188
1288
1388
1488
1588
1688
1788
1888
1988
2088
2188
2288
2387
2487
2587
2687
2787
2887
2987
3087
3187

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 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
11972
21981
31981
41981
51981
61981
71981
81981
91981
101981
111981
121972
131972
141972
151972
161972
172962
182953
192953
202953
212953
222944
232944
242944
252935
262935
272935
282926
292926
302917
312917

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 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 6:30 AM to 6:40 AM, and sunset from 6:28 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:306:28
212.06:306:28
312.06:316:28
412.06:316:29
512.06:326:29
612.06:326:30
712.06:336:30
812.06:336:31
912.06:336:31
1012.06:346:32
1112.06:346:32
1212.06:356:32
1312.06:356:33
1412.06:356:33
1512.06:366:33
1612.06:366:34
1712.06:366:34
1812.06:376:35
1912.06:376:35
2012.06:376:35
2112.06:386:36
2212.06:386:36
2312.06:386:36
2412.06:386:36
2512.06:396:37
2612.06:396:37
2712.06:396:37
2812.06:396:37
2912.06:406:38
3012.06:406:38
3112.06:406:38

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.96 kWh/m².

For context, solar energy here swings from a low near 3.67 kWh/m² to a high of 6.23 kWh/m² in October across the year — January's 3.96 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.1Bright
64.1Bright
74.1Bright
84.0Bright
94.0Bright
104.0Bright
114.0Bright
124.0Moderate
134.0Moderate
144.0Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.8Moderate
313.8Moderate
Planning a trip in January

Hazard calendar for Porto Grande

In seasonPeak

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

Porto Grande's monsoon runs January–June, 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 Porto Grande?

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

2.9
Sightseeing
10th-best month of the year
4.0
Beach & pool
8th-best month of the year

January is a weaker month for outdoor sightseeing in Porto Grande.

What to pack for Porto Grande in January

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

In January, Porto Grande sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 27 days see rain.

light clothesrain gear

UV index in Porto Grande in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Porto Grande peaks around February 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 22UV 15Aug 10UV 11
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Porto Grande 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 Porto Grande is worst in February — around 20 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (July, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2020 µg/m³Jul 218 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar19Moderate
Apr17Moderate
May10Good
Jun8Good
Jul8Good
Aug8Good
Sep10Good
Oct14Moderate
Nov14Moderate
Dec15Moderate
Location & terrain

Where is Porto Grande?

Porto Grande sits at 0.7°N, 51.4°W, 68 m above sea level, in Brazil. The nearest listed city is Macapá, 84 km away.

Anajás

Topography around Porto Grande

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

Within 3 km, the terrain around Porto Grande has only modest variations in elevation — a maximum elevation change of 59 m around an average of 74 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 177 m; within 80 km, significant variations in elevation — a maximum elevation change of 440 m.

The land around Porto Grande is covered by trees (40%) and grassland (34%) within 3 km, trees (73%) and grassland (22%) within 16 km, and trees (78%) within 80 km.

3 km
59 m
16 km
177 m
80 km
440 m
treesgrasslandartificial surfacesbare terrainwaterwetland
January weather nearby: Macapá 84 km · Santana 88 km · Mazagão 93 km · Afuá 150 km · Chaves 186 km · Laranjal do Jari 210 km · Gurupá 237 km · Anajás 250 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 Porto Grande (0.7133°, -51.4133°, elevation 68 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).