São Luís de Montes Belos weather in December

In December, São Luís de Montes Belos sees average daytime highs of 29°C and overnight lows near 21°C, with 238 mm of rain across 25.3 wet days and about 13 hours of daylight. It is the 11th-warmest and 2nd-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 December, and the air most often feels muggy.

Daylight stretches from about 12 h 54 min at the start of December to 13 hours by month's end. Set against the rest of the year, December is São Luís de Montes Belos's 11th-clearest and 8th-windiest month. For the whole year in context, see São Luís de Montes Belos's year-round climate.

Daytime high
29°
11th warmest
Overnight low
21°
11th coldest
Rainfall
238 mm
25.3 wet days
Daylight
13 hours
6:48 AM – 7:47 PM
Cloud cover
80%
11th clearest
Wind
7 km/h
8th windiest
Solar energy
5.34 kWh/m²
Travel score
3.4
out of 10

São Luís de Montes Belos 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 29°C through the month.

A typical December day in São Luís de Montes Belos reaches about 29°C in the afternoon and slips back to 21°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 32°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12921
22921
32921
42921
52921
62921
72921
82921
92921
102921
112921
122921
132921
142921
152921
162921
172921
182921
192921
202921
212921
222921
232921
242921
252921
262921
272921
282921
292921
302921
312921

How December really feels in São Luís de Montes Belos

Once humidity and wind are folded in, December averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

São Luís de Montes Belos weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°2592512.93.5
Feb29° / 21°1932212.63.5
Mar30° / 21°19123.212.13.6
Apr30° / 20°8712.311.64.7
May30° / 19°132.411.26.2
Jun30° / 17°40.6116.5
Jul30° / 17°20.311.16.4
Aug32° / 19°70.811.45.1
Sep34° / 21°295.211.93.7
Oct32° / 22°10716.212.43.2
Nov30° / 21°18522.712.83.4
Dec29° / 21°23825.3133.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11882
21783
31783
41684
51585
61585
71486
81486
91585
101585
111585
121684
131684
141783
151783
161882
171981
182080
192080
202179
212080
222179
232179
242278
252179
262179
272179
282080
292080
302080
311981

Chance of precipitation in December

Any precipitation

São Luís de Montes Belos gets around 238 mm of rain over 25.3 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 81% and peaks near 85% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
183
283
383
484
584
684
784
885
984
1084
1184
1284
1383
1483
1583
1682
1782
1881
1981
2080
2180
2279
2379
2478
2578
2678
2778
2878
2978
3078
3179

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 60% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1146035
2145837
3035938
4035839
5035740
6025840
7025741
8025741
9025642
10025642
11025741
12025741
13025840
14025840
15025939
16026038
17026137
18026137
19036136
20036235
21036334
22036334
23036433
24036433
25036433
26036433
27026434
28026335
29026236
30026137
31035938

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 6 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
16calm
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 December

DaylightNight

Daylight runs from about 12 h 54 min at the start of December to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:44 AM to 6:55 AM, and sunset from 7:39 PM to 7:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:447:39
212.96:447:39
312.96:447:40
412.96:447:40
512.96:457:41
612.96:457:42
712.96:457:42
813.06:457:43
913.06:467:43
1013.06:467:44
1113.06:467:44
1213.06:477:45
1313.06:477:45
1413.06:477:46
1513.06:487:47
1613.06:487:47
1713.06:497:48
1813.06:497:48
1913.06:507:49
2013.06:507:49
2113.06:507:50
2213.06:517:50
2313.06:517:50
2413.06:527:51
2513.06:527:51
2613.06:537:52
2713.06:537:52
2813.06:547:53
2913.06:547:53
3013.06:557:53
3113.06:557:54

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.34 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.06 kWh/m² in October across the year — December's 5.34 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in December

Hazard calendar for São Luís de Montes Belos

In seasonPeak

In December, São Luís de Montes Belos sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

São Luís de Montes Belos's monsoon runs November–March, 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 Luís de Montes Belos?

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

3.4
Sightseeing
10th-best month of the year
4.4
Beach & pool
12th-best month of the year

December is a weaker month for outdoor sightseeing in São Luís de Montes Belos.

What to pack for São Luís de Montes Belos in December

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

In December, São Luís de Montes Belos sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

UV index in São Luís de Montes Belos in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December 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 São Luís de Montes Belos peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 21UV 15Jun 22UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep12Extreme
Oct13Extreme
Nov13Extreme
Dec14Extreme

Air quality in São Luís de Montes Belos 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 Luís de Montes Belos is worst in September — around 21 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (June, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1720 µg/m³Jun 237 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr8Good
May7Good
Jun7Good
Jul7Good
Aug11Good
Sep21Moderate
Oct13Moderate
Nov7Good
Dec7Good
Location & terrain

Where is São Luís de Montes Belos?

São Luís de Montes Belos sits at 16.5°S, 50.4°W, 579 m above sea level, in Brazil. The nearest listed city is Anicuns, 44 km away.

Topography around São Luís de Montes Belos

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

Within 3 km, the terrain around São Luís de Montes Belos has only modest variations in elevation — a maximum elevation change of 248 m around an average of 580 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 373 m; within 80 km, large variations in elevation — a maximum elevation change of 729 m.

The land around São Luís de Montes Belos is covered by grassland (39%), artificial surfaces (25%) and trees (21%) within 3 km, grassland (51%) and cropland (31%) within 16 km, and grassland (37%), cropland (37%) and trees (25%) within 80 km.

3 km
248 m
16 km
373 m
80 km
729 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Anicuns 44 km · Palmeiras de Goiás 57 km · Goiás 70 km · Indiara 79 km · Iporá 80 km · Itaberaí 82 km · Jussara 90 km · Trindade 95 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 Luís de Montes Belos (-16.525°, -50.3722°, elevation 579 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).