São Domingos do Maranhão weather in December

In December, São Domingos do Maranhão sees average daytime highs of 32°C and overnight lows near 23°C, with 140 mm of rain across 18.1 wet days and about 12.3 hours of daylight. It is the 7th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 14% 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 Domingos do Maranhão's 8th-clearest and 8th-windiest month. For the whole year in context, see São Domingos do Maranhão's year-round climate.

Daytime high
32°
7th warmest
Overnight low
23°
9th coldest
Rainfall
140 mm
18.1 wet days
Daylight
12 h 18 min
5:44 AM – 6:03 PM
Cloud cover
71%
8th clearest
Wind
5 km/h
8th windiest
Solar energy
5.21 kWh/m²
Travel score
3.1
out of 10

São Domingos do Maranhão is 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 32°C through the month.

A typical December day in São Domingos do Maranhão reaches about 32°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, December runs about 1°C cooler than November and about 1°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13323
23323
33323
43323
53323
63323
73223
83223
93223
103223
113223
123223
133223
143223
153223
163223
173223
183223
193223
203223
213223
223223
233223
243223
253123
263123
273123
283123
293123
303123
313123

How December really feels in São Domingos do Maranhão

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 Domingos do Maranhão weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°24226.212.32.9
Feb30° / 23°22824.512.22.9
Mar30° / 23°26527.9122.8
Apr30° / 23°18523.211.93.2
May31° / 23°8312.611.74.1
Jun32° / 23°112.611.74.7
Jul33° / 22°70.911.74.5
Aug34° / 23°20.411.83.8
Sep35° / 23°121.8123.0
Oct35° / 24°305.212.13.0
Nov33° / 24°8411.712.33.2
Dec32° / 23°14018.112.33.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 68%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24060
34060
44060
54060
63961
73961
83862
93763
103763
113565
123466
133367
143268
153169
163169
173070
183070
192971
202872
212773
222773
232773
242674
252674
262575
272575
282476
292476
302377
312377

Chance of precipitation in December

Any precipitation

São Domingos do Maranhão gets around 140 mm of rain over 18.1 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 60% and peaks near 76% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
146
246
346
446
546
647
747
848
950
1051
1152
1254
1356
1457
1559
1661
1762
1864
1965
2066
2167
2268
2369
2470
2571
2672
2773
2873
2974
3075
3176

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 89% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
114833
214833
314833
413843
512853
612844
711854
810864
99874
108884
117894
126904
136904
145914
154924
164924
173925
183925
192935
202935
212935
222926
232926
242926
252917
262917
272917
282917
292917
302917
312917

Wind in December

Winds average 5 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
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
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 5:38 AM to 5:51 AM, and sunset from 5:56 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:385:56
212.35:395:57
312.35:395:57
412.35:395:58
512.35:405:58
612.35:405:59
712.35:405:59
812.35:416:00
912.35:416:00
1012.35:426:00
1112.35:426:01
1212.35:426:01
1312.35:436:02
1412.35:436:02
1512.35:446:03
1612.35:446:03
1712.35:456:04
1812.35:456:04
1912.35:456:05
2012.35:466:05
2112.35:466:06
2212.35:476:06
2312.35:476:07
2412.35:486:07
2512.35:486:08
2612.35:496:08
2712.35:496:09
2812.35:506:09
2912.35:506:09
3012.35:516:10
3112.35:516:10

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.21 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.42 kWh/m² in September across the year — December's 5.21 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.3Bright
125.3Bright
135.3Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.1Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in December

Hazard calendar for São Domingos do Maranhão

In seasonPeak

In December, São Domingos do Maranhão sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

São Domingos do Maranhão's monsoon runs December–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 Domingos do Maranhão?

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

3.1
Sightseeing
7th-best month of the year
5.0
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in São Domingos do Maranhão.

What to pack for São Domingos do Maranhão in December

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

In December, São Domingos do Maranhão sees daytime highs around 32°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

UV index in São Domingos do Maranhão 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 Domingos do Maranhão peaks around March 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeMar 11UV 15Jul 24UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme

Air quality in São Domingos do Maranhão 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 Domingos do Maranhão is worst in October — around 55 µg/m³ PM2.5 (unhealthy), about 6.3× the cleanest month (June, 9 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateOct 1752 µg/m³Jun 199 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb14Moderate
Mar13Moderate
Apr12Good
May10Good
Jun9Good
Jul9Good
Aug18Moderate
Sep27Moderate
Oct55Unhealthy
Nov30Moderate
Dec22Moderate
Location & terrain

Where is São Domingos do Maranhão?

São Domingos do Maranhão sits at 5.6°S, 44.4°W, 179 m above sea level, in Brazil. The nearest listed city is Fortuna, 31 km away.

Topography around São Domingos do Maranhão

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

Within 3 km, the terrain around São Domingos do Maranhão has only modest variations in elevation — a maximum elevation change of 63 m around an average of 188 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 172 m; within 80 km, significant variations in elevation — a maximum elevation change of 443 m.

The land around São Domingos do Maranhão is covered by grassland (49%) and trees (37%) within 3 km, grassland (49%) and trees (45%) within 16 km, and trees (65%) and grassland (31%) within 80 km.

3 km
63 m
16 km
172 m
80 km
443 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Fortuna 31 km · Presidente Dutra 34 km · Tuntum 46 km · Colinas 52 km · Dom Pedro 60 km · Buriti Bravo 68 km · São João do Soter 82 km · Mirador 88 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 Domingos do Maranhão (-5.5758°, -44.3853°, elevation 179 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).