São Sebastião da Boa Vista weather in January

In January, São Sebastião da Boa Vista sees average daytime highs of 30°C and overnight lows near 24°C, with 261 mm of rain across 27.7 wet days and about 12.1 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 6% of the time in January, and the air most often feels miserable.

Daylight stretches from about 12 h 06 min at the start of January to 12 h 06 min by month's end. Set against the rest of the year, January is São Sebastião da Boa Vista's 9th-clearest and 6th-windiest month. For the whole year in context, see São Sebastião da Boa Vista's year-round climate.

Daytime high
30°
9th warmest
Overnight low
24°
3rd coldest
Rainfall
261 mm
27.7 wet days
Daylight
12 h 06 min
6:25 AM – 6:30 PM
Cloud cover
79%
9th clearest
Wind
8 km/h
6th windiest
Solar energy
5.01 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 São Sebastião da Boa Vista 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 32°C. Set against its neighbours, January runs about 1°C cooler than December and on par with February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133024
143024
153024
163024
173024
183024
193024
203024
213024
223024
233024
243024
253024
263024
273024
283024
293024
303024
313024

How January really feels in São Sebastião da Boa Vista

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.

São Sebastião da Boa Vista 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°26127.712.12.8
Feb30° / 24°34926.812.12.7
Mar30° / 24°44330.4122.6
Apr30° / 24°41729.4122.6
May31° / 25°29827.811.92.8
Jun31° / 24°13220.411.93.4
Jul31° / 24°7615.311.94.0
Aug32° / 25°348.311.94.3
Sep32° / 25°184.5124.4
Oct33° / 25°204.9124.2
Nov32° / 25°437.312.14.0
Dec32° / 25°1141712.13.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% 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 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22575
32575
42575
52476
62377
72278
82278
92179
102080
112080
121981
131882
141783
151783
161783
171684
181585
191585
201585
211585
221585
231585
241486
251486
261486
271486
281486
291486
301288
311288

Chance of precipitation in January

Any precipitation

São Sebastião da Boa Vista gets around 261 mm of rain over 27.7 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 89% and peaks near 93% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
179
280
381
482
583
684
785
886
987
1087
1188
1289
1390
1490
1591
1691
1791
1892
1992
2092
2192
2292
2392
2492
2592
2692
2792
2892
2992
3093
3193

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the miserable band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
13763
23763
33763
43763
53763
63664
73664
83664
93664
103664
113664
123664
133565
143565
153565
163565
173565
183565
193565
203565
213466
223466
233466
243466
253466
263466
273466
283466
293466
303466
313466

Wind in January

Winds average 8 km/h in January.

Across January, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in January

DaylightNight

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

Days grow by about 0 minutes over January. Sunrise moves from 6:18 AM to 6:29 AM, and sunset from 6:24 PM to 6:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:186:24
212.16:196:25
312.16:196:25
412.16:206:26
512.16:206:26
612.16:216:26
712.16:216:27
812.16:226:27
912.16:226:28
1012.16:226:28
1112.16:236:28
1212.16:236:29
1312.16:246:29
1412.16:246:29
1512.16:246:30
1612.16:256:30
1712.16:256:30
1812.16:256:31
1912.16:266:31
2012.16:266:31
2112.16:266:32
2212.16:276:32
2312.16:276:32
2412.16:276:32
2512.16:286:33
2612.16:286:33
2712.16:286:33
2812.16:296:33
2912.16:296:33
3012.16:296:34
3112.16:296:34

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.01 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 6.65 kWh/m² in October across the year — January's 5.01 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in January

Hazard calendar for São Sebastião da Boa Vista

In seasonPeak

In January, São Sebastião da Boa Vista sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

São Sebastião da Boa Vista'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 São Sebastião da Boa Vista?

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

2.8
Sightseeing
8th-best month of the year
4.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in São Sebastião da Boa Vista.

What to pack for São Sebastião da Boa Vista in January

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

In January, São Sebastião da Boa Vista sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 28 days see rain.

light clothesrain gearsun protection

UV index in São Sebastião da Boa Vista 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 São Sebastião da Boa Vista peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 14UV 15Jul 24UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in São Sebastião da Boa Vista 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 Sebastião da Boa Vista is worst in February — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (June, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2019 µg/m³Jun 239 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb19Moderate
Mar19Moderate
Apr16Moderate
May11Good
Jun9Good
Jul9Good
Aug11Good
Sep13Moderate
Oct16Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is São Sebastião da Boa Vista?

São Sebastião da Boa Vista sits at 1.7°S, 49.5°W, 5 m above sea level, in Brazil. The nearest listed city is Limoeiro do Ajuru, 26 km away.

Topography around São Sebastião da Boa Vista

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Sebastião da Boa Vista.

Within 3 km, the terrain around São Sebastião da Boa Vista has only modest variations in elevation — a maximum elevation change of 25 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 29 m; within 80 km, only modest variations in elevation — a maximum elevation change of 40 m.

The land around São Sebastião da Boa Vista is covered by trees (60%) and water (37%) within 3 km, trees (64%) and water (33%) within 16 km, and trees (71%) within 80 km.

3 km
25 m
16 km
29 m
80 km
40 m
treesgrasslandartificial surfaceswaterwetland
January weather nearby: Limoeiro do Ajuru 26 km · Curralinho 31 km · Muaná 41 km · Oeiras do Pará 48 km · Cametá 59 km · Igarapé Miri 70 km · Abaetetuba 72 km · Bagre 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 Sebastião da Boa Vista (-1.7146°, -49.5315°, elevation 5 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).