São João do Soter weather in December

In December, São João do Soter sees average daytime highs of 33°C and overnight lows near 24°C, with 121 mm of rain across 15.2 wet days and about 12.3 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 17% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 18 min at the start of December to 12 h 18 min by month's end. Set against the rest of the year, December is São João do Soter's 8th-clearest and 7th-windiest month. For the whole year in context, see São João do Soter's year-round climate.

Daytime high
33°
5th warmest
Overnight low
24°
10th coldest
Rainfall
121 mm
15.2 wet days
Daylight
12 h 18 min
5:43 AM – 6:00 PM
Cloud cover
68%
8th clearest
Wind
6 km/h
7th windiest
Solar energy
5.38 kWh/m²
Travel score
2.9
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical December day in São João do Soter reaches about 33°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 36°C. Set against its neighbours, December runs about 1°C cooler than November and about 2°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13424
23424
33424
43424
53424
63424
73424
83424
93424
103424
113424
123424
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243323
253323
263323
273323
283323
293223
303223
313223

How December really feels in São João do Soter

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 do Soter weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°24025.312.32.7
Feb31° / 23°25624.412.22.7
Mar31° / 23°30828.3122.6
Apr31° / 23°24725.111.92.9
May31° / 23°11615.211.83.8
Jun32° / 23°184.111.74.4
Jul33° / 23°81.511.74.3
Aug34° / 23°30.711.83.6
Sep36° / 23°81.4122.8
Oct36° / 24°193.612.12.6
Nov35° / 24°608.712.22.8
Dec33° / 24°12115.212.32.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 20% of December, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34654
44654
54753
64654
74654
84456
94357
104357
114258
124159
134060
143961
153862
163763
173763
183565
193466
203268
213268
223268
233070
243070
252971
262971
272872
282872
292674
302674
312575

Chance of precipitation in December

Any precipitation

São João do Soter gets around 121 mm of rain over 15.2 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 50% and peaks near 70% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
135
235
335
436
536
637
738
839
940
1041
1143
1244
1346
1447
1549
1650
1752
1853
1954
2055
2156
2258
2359
2460
2562
2663
2764
2866
2967
3068
3170

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
121763
221763
321763
420773
520773
620773
719783
819783
918793
1017803
1116813
1215823
1314833
1413834
1512844
1611854
1710864
189874
198875
208875
217885
227876
236886
246877
256877
266877
276868
285878
295878
305869
315869

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 18 min at the start of December to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 5:37 AM to 5:50 AM, and sunset from 5:53 PM to 6:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:375:53
212.35:375:54
312.35:375:54
412.35:385:55
512.35:385:55
612.35:385:55
712.35:395:56
812.35:395:56
912.35:405:57
1012.35:405:57
1112.35:405:58
1212.35:415:58
1312.35:415:59
1412.35:425:59
1512.35:426:00
1612.35:436:00
1712.35:436:01
1812.35:436:01
1912.35:446:02
2012.35:446:02
2112.35:456:03
2212.35:456:03
2312.35:466:04
2412.35:466:04
2512.35:476:05
2612.35:476:05
2712.35:486:05
2812.35:486:06
2912.35:496:06
3012.35:496:07
3112.35:506:07

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.38 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.4 kWh/m² in September across the year — December's 5.38 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in December

Hazard calendar for São João do Soter

In seasonPeak

None of São João do Soter'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 do Soter's monsoon runs January–April, 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 do Soter?

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

2.9
Sightseeing
5th-best month of the year
5.2
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in São João do Soter.

What to pack for São João do Soter in December

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

In December, São João do Soter sees daytime highs around 33°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

UV index in São João do Soter 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 do Soter peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 12UV 15Aug 10UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in São João do Soter 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 do Soter is worst in October — around 83 µg/m³ PM2.5 (unhealthy), about 7.2× the cleanest month (May, 12 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecModerateModeratePoorUnhealthyModerateOct 1578 µg/m³May 1112 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar13Moderate
Apr12Moderate
May12Good
Jun16Moderate
Jul18Moderate
Aug32Moderate
Sep53Poor
Oct83Unhealthy
Nov39Poor
Dec26Moderate
Location & terrain

Where is São João do Soter?

São João do Soter sits at 5.1°S, 43.8°W, 114 m above sea level, in Brazil. The nearest listed city is Caxias, 58 km away.

Topography around São João do Soter

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

Within 3 km, the terrain around São João do Soter has only modest variations in elevation — a maximum elevation change of 68 m around an average of 132 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 184 m; within 80 km, significant variations in elevation — a maximum elevation change of 268 m.

The land around São João do Soter is covered by trees (64%) and grassland (23%) within 3 km, trees (66%) and grassland (23%) within 16 km, and trees (66%) and grassland (25%) within 80 km.

3 km
68 m
16 km
184 m
80 km
268 m
treesshrubsgrasslandcroplandartificial surfaces
December weather nearby: Caxias 58 km · Aldeias Altas 66 km · Dom Pedro 70 km · Codó 74 km · Presidente Dutra 78 km · Fortuna 79 km · Buriti Bravo 80 km · Matões 81 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 do Soter (-5.1139°, -43.81°, elevation 114 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).