São Miguel weather in December

In December, São Miguel sees average daytime highs of 34°C and overnight lows near 23°C, with 28 mm of rain across 4.8 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 33% of the time in December, and the air most often feels humid.

Daylight stretches from about 12 h 18 min at the start of December to 12 h 24 min by month's end. Set against the rest of the year, December is São Miguel's 7th-clearest and 6th-windiest month. For the whole year in context, see São Miguel's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
23°
12th coldest
Rainfall
28 mm
4.8 wet days
Daylight
12 h 24 min
5:19 AM – 5:41 PM
Cloud cover
55%
7th clearest
Wind
13 km/h
6th windiest
Solar energy
6.58 kWh/m²
Travel score
3.5
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 34°C through the month.

A typical December day in São Miguel reaches about 34°C in the afternoon and slips back to 23°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 35°C. Set against its neighbours, December runs on par with November and about 1°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13423
23423
33423
43423
53423
63423
73423
83423
93423
103423
113423
123423
133423
143423
153423
163423
173423
183423
193423
203423
213423
223423
233423
243423
253323
263323
273323
283323
293323
303323
313323

How December really feels in São Miguel

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 Miguel weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°12714.112.33.4
Feb31° / 22°14715.812.23.5
Mar31° / 22°19219.5123.6
Apr30° / 22°15617.611.93.9
May30° / 22°9111.611.74.7
Jun30° / 21°356.411.65.4
Jul31° / 20°203.511.75.6
Aug32° / 20°7111.85.1
Sep33° / 21°30.6124.3
Oct34° / 22°13112.13.7
Nov34° / 23°61.412.33.6
Dec34° / 23°284.812.43.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36139
46139
56139
66040
76040
86040
96040
105941
115941
125941
135842
145941
155842
165842
175743
185842
195743
205743
215644
225644
235545
245446
255446
265446
275446
285446
295347
305248
315149

Chance of precipitation in December

Any precipitation

São Miguel gets around 28 mm of rain over 4.8 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 16% and peaks near 28% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
16
26
37
47
58
68
79
810
910
1011
1112
1213
1313
1414
1515
1615
1716
1817
1917
2018
2119
2219
2320
2421
2522
2623
2723
2824
2925
3026
3128

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 43% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1962281
2961282
3961282
4960292
5960292
6860302
7859303
8759313
9758323
10757333
11657343
12656353
13655363
14555373
15553384
16552394
17551404
18550414
19550424
20549434
21548444
22547454
23545464
24544464
25643474
26642485
27641495
28640495
29639506
30637516
31636517

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
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912calm
3012calm
3112calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 18 min at the start of December to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:14 AM to 5:26 AM, and sunset from 5:34 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:145:34
212.35:145:34
312.35:145:35
412.35:155:35
512.35:155:36
612.35:155:36
712.35:165:37
812.35:165:37
912.45:165:38
1012.45:175:38
1112.45:175:38
1212.45:185:39
1312.45:185:39
1412.45:195:40
1512.45:195:40
1612.45:195:41
1712.45:205:41
1812.45:205:42
1912.45:215:42
2012.45:215:43
2112.45:225:43
2212.45:225:44
2312.45:235:44
2412.45:235:45
2512.45:245:45
2612.45:245:46
2712.45:255:46
2812.45:255:47
2912.45:255:47
3012.45:265:47
3112.45:265:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.58 kWh/m².

For context, solar energy here swings from a low near 4.93 kWh/m² to a high of 7.15 kWh/m² in October across the year — December's 6.58 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.8Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.6Intense
126.6Intense
136.6Intense
146.6Intense
156.6Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
316.4Intense
Planning a trip in December

Hazard calendar for São Miguel

In seasonPeak

None of São Miguel'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 Miguel'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 Miguel?

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

3.5
Sightseeing
10th-best month of the year
6.8
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in São Miguel. The water and warmth also suit a beach or pool day.

What to pack for São Miguel in December

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

In December, São Miguel sees daytime highs around 34°C and nights near 23°C. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in São Miguel in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (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 Miguel peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 16 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 13UV 15Jul 16UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep13Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is São Miguel?

São Miguel sits at 6.2°S, 38.5°W, 682 m above sea level, in Brazil. The nearest listed city is Pereiro, 19 km away.

Topography around São Miguel

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

Within 3 km, the terrain around São Miguel has significant variations in elevation — a maximum elevation change of 263 m around an average of 658 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 675 m; within 80 km, large variations in elevation — a maximum elevation change of 818 m.

The land around São Miguel is covered by shrubs (45%) and grassland (34%) within 3 km, shrubs (55%) and grassland (23%) within 16 km, and shrubs (59%) and grassland (29%) within 80 km.

3 km
263 m
16 km
675 m
80 km
818 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Pereiro 19 km · Pau dos Ferros 34 km · Jaguaribe 38 km · Icó 46 km · Orós 46 km · São João do Rio do Peixe 58 km · Sousa 68 km · Jaguaretama 73 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 Miguel (-6.2119°, -38.4969°, elevation 682 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).