São João de Pirabas weather in December

In December, São João de Pirabas sees average daytime highs of 30°C and overnight lows near 25°C, with 99 mm of rain across 18.4 wet days and about 12 hours of daylight. It is the 4th-warmest and 8th-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 25% of the time in December, and the air most often feels miserable.

Daylight stretches from about 12 hours at the start of December to 12 hours by month's end. Set against the rest of the year, December is São João de Pirabas's 7th-clearest and 4th-windiest month. For the whole year in context, see São João de Pirabas's year-round climate.

Daytime high
30°
4th warmest
Overnight low
25°
9th coldest
Rainfall
99 mm
18.4 wet days
Daylight
12 hours
6:04 AM – 6:06 PM
Cloud cover
61%
7th clearest
Wind
13 km/h
4th windiest
Solar energy
5.46 kWh/m²
Travel score
4.2
out of 10

São João de Pirabas is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in São João de Pirabas reaches about 30°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, December runs on par with November and about 1°C warmer than January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153025
163025
173025
183025
193025
203025
212925
222925
232925
242925
252925
262925
272925
282925
292925
302925
312925

How December really feels in São João de Pirabas

Once humidity and wind are folded in, December 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 December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

São João de Pirabas weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°29628.6123.2
Feb28° / 24°40427.3123.1
Mar28° / 24°51030.6123.0
Apr28° / 24°45929.5123.0
May29° / 24°31528.5123.2
Jun29° / 24°14725.6123.5
Jul29° / 24°10122.8124.0
Aug29° / 25°4015.5124.9
Sep30° / 25°186.3125.9
Oct30° / 25°144.4125.9
Nov30° / 25°257.4125.4
Dec30° / 25°9918.4124.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 22% of December, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35842
45644
55644
65644
75545
85545
95446
105347
115248
125149
135050
145050
154852
164852
174654
184555
194456
204357
214258
224159
234060
244060
253763
263763
273664
283565
293466
303466
313268

Chance of precipitation in December

Any precipitation

São João de Pirabas gets around 99 mm of rain over 18.4 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 59% and peaks near 83% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
133
235
336
438
540
641
743
845
947
1049
1151
1253
1355
1457
1559
1661
1763
1864
1966
2068
2169
2271
2372
2474
2575
2676
2778
2879
2980
3082
3183

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the miserable band about 59% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
15941
25842
35743
45644
55545
65347
75248
85149
94951
104852
114654
124555
134357
144258
154060
163961
173862
183664
193565
203466
213367
223268
233169
243070
252971
262971
272971
282971
292872
302971
312971

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

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

Days grow by about 0 minutes over December. Sunrise moves from 5:57 AM to 6:11 AM, and sunset from 6:00 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.05:576:00
212.05:586:00
312.05:586:00
412.05:586:01
512.05:596:01
612.05:596:02
712.06:006:02
812.06:006:03
912.06:006:03
1012.06:016:03
1112.06:016:04
1212.06:026:04
1312.06:026:05
1412.06:036:05
1512.06:036:06
1612.06:046:06
1712.06:046:07
1812.06:046:07
1912.06:056:08
2012.06:056:08
2112.06:066:09
2212.06:066:09
2312.06:076:09
2412.06:076:10
2512.06:086:10
2612.06:086:11
2712.06:096:11
2812.06:096:12
2912.06:106:12
3012.06:106:13
3112.06:116:13

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.46 kWh/m².

For context, solar energy here swings from a low near 4.09 kWh/m² to a high of 6.33 kWh/m² in October across the year — December's 5.46 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.6Bright
115.6Bright
125.6Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.1Bright
305.0Bright
315.0Bright
Planning a trip in December

Hazard calendar for São João de Pirabas

In seasonPeak

None of São João de Pirabas's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

São João de Pirabas'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 December a good time to visit São João de Pirabas?

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

4.2
Sightseeing
5th-best month of the year
5.6
Beach & pool
5th-best month of the year

December is a reasonable time to visit São João de Pirabas for sightseeing.

What to pack for São João de Pirabas in December

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

In December, São João de Pirabas sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near São João de Pirabas in December

The nearest coast averages about 28°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 18 km away) is warmest in June at about 29°C and coldest in September near 28°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar28Tropical
Apr28Tropical
May29Tropical
Jun29Tropical
Jul28Tropical
Aug28Tropical
Sep28Warm
Oct28Tropical
Nov28Tropical
Dec28Tropical

UV index in São João de Pirabas in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (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 João de Pirabas peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 18 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 15Jul 18UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in São João de Pirabas in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in São João de Pirabas is worst in February — around 22 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (July, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2022 µg/m³Jul 127 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb22Moderate
Mar21Moderate
Apr16Moderate
May9Good
Jun7Good
Jul7Good
Aug8Good
Sep10Good
Oct11Good
Nov13Moderate
Dec15Moderate
Location & terrain

Where is São João de Pirabas?

São João de Pirabas sits at 0.8°S, 47.2°W, 26 m above sea level, in Brazil. The nearest listed city is Salinópolis, 26 km away.

Topography around São João de Pirabas

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

Within 3 km, the terrain around São João de Pirabas has only modest variations in elevation — a maximum elevation change of 31 m around an average of 9 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 58 m; within 80 km, only modest variations in elevation — a maximum elevation change of 111 m.

The land around São João de Pirabas is covered by mangroves (37%), water (30%) and trees (23%) within 3 km, trees (39%), water (26%) and mangroves (26%) within 16 km, and trees (37%) and water (37%) within 80 km.

3 km
31 m
16 km
58 m
80 km
111 m
treesgrasslandartificial surfaceswaterwetlandmangroves
December weather nearby: Salinópolis 26 km · Maracanã 31 km · Tracuateua 45 km · Capanema 47 km · Bragança 55 km · Marapanim 58 km · Igarapé-Açu 63 km · Augusto Corrêa 66 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 João de Pirabas (-0.7747°, -47.1772°, elevation 26 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).