São Miguel do Guamá weather in December

In December, São Miguel do Guamá sees average daytime highs of 33°C and overnight lows near 24°C, with 89 mm of rain across 15 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 7th-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 11% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of December to 12 h 06 min by month's end. Set against the rest of the year, December is São Miguel do Guamá's 7th-clearest and 4th-windiest month. For the whole year in context, see São Miguel do Guamá's year-round climate.

Daytime high
33°
4th warmest
Overnight low
24°
12th coldest
Rainfall
89 mm
15 wet days
Daylight
12 h 06 min
6:03 AM – 6:09 PM
Cloud cover
69%
7th clearest
Wind
10 km/h
4th windiest
Solar energy
5.22 kWh/m²
Travel score
3.0
out of 10

São Miguel do Guamá 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 33°C through the month.

A typical December day in São Miguel do Guamá reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°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)
13424
23424
33424
43424
53424
63424
73424
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273324
283324
293224
303224
313224

How December really feels in São Miguel do Guamá

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 do Guamá weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°19825.212.12.6
Feb31° / 23°27625.912.12.5
Mar31° / 23°35230.1122.5
Apr31° / 23°34828.9122.5
May31° / 23°21525.511.92.8
Jun31° / 23°9518.511.93.5
Jul32° / 22°6613.311.94.0
Aug33° / 23°287.611.94.0
Sep34° / 23°215.6123.6
Oct34° / 24°246123.3
Nov34° / 24°417.312.13.2
Dec33° / 24°891512.13.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 25% of December, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34555
44555
54555
64456
74456
84357
94258
104258
114159
124060
133961
143862
153763
163664
173565
183466
193367
203268
213169
223070
232971
242872
252872
262773
272773
282773
292674
302674
312575

Chance of precipitation in December

Any precipitation

São Miguel do Guamá gets around 89 mm of rain over 15 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 48% and peaks near 68% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
128
229
330
431
532
634
735
836
938
1039
1141
1243
1344
1446
1547
1649
1750
1852
1953
2054
2156
2257
2359
2460
2561
2662
2764
2865
2966
3067
3168

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 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
14942
24942
33952
43952
53952
63952
72971
82971
92971
102971
112971
122971
131981
141981
151981
161981
171981
181981
191972
201972
211972
221972
231963
241963
251963
261954
271954
281945
291945
301945
311936

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 06 min at the start of December to 12 h 06 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 5:57 AM to 6:10 AM, and sunset from 6:02 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:576:02
212.15:576:03
312.15:586:03
412.15:586:04
512.15:596:04
612.15:596:04
712.15:596:05
812.16:006:05
912.16:006:06
1012.16:016:06
1112.16:016:07
1212.16:016:07
1312.16:026:08
1412.16:026:08
1512.16:036:08
1612.16:036:09
1712.16:046:09
1812.16:046:10
1912.16:056:10
2012.16:056:11
2112.16:066:11
2212.16:066:12
2312.16:076:12
2412.16:076:13
2512.16:076:13
2612.16:086:14
2712.16:086:14
2812.16:096:15
2912.16:096:15
3012.16:106:15
3112.16:106:16

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.22 kWh/m².

For context, solar energy here swings from a low near 4.09 kWh/m² to a high of 6.1 kWh/m² in October across the year — December's 5.22 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.4Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.2Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
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 Miguel do Guamá

In seasonPeak

None of São Miguel do Guamá'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 do Guamá'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 do Guamá?

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

3.0
Sightseeing
7th-best month of the year
5.3
Beach & pool
6th-best month of the year

December is a weaker month for outdoor sightseeing in São Miguel do Guamá.

What to pack for São Miguel do Guamá in December

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

In December, São Miguel do Guamá 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 Miguel do Guamá 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 Miguel do Guamá peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Jul 17UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec11Extreme

Air quality in São Miguel do Guamá 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 Miguel do Guamá is worst in November — around 21 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (July, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 2020 µg/m³Jul 128 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar20Moderate
Apr15Moderate
May10Good
Jun8Good
Jul8Good
Aug9Good
Sep11Good
Oct13Moderate
Nov21Moderate
Dec19Moderate
Location & terrain

Where is São Miguel do Guamá?

São Miguel do Guamá sits at 1.6°S, 47.5°W, 9 m above sea level, in Brazil. The nearest listed city is Irituia, 17 km away.

Topography around São Miguel do Guamá

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

Within 3 km, the terrain around São Miguel do Guamá has only modest variations in elevation — a maximum elevation change of 43 m around an average of 12 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 66 m; within 80 km, only modest variations in elevation — a maximum elevation change of 153 m.

The land around São Miguel do Guamá is covered by trees (52%) within 3 km, trees (70%) and grassland (27%) within 16 km, and trees (61%) and grassland (37%) within 80 km.

3 km
43 m
16 km
66 m
80 km
153 m
treesgrasslandartificial surfacesbare terrainwaterwetland
December weather nearby: Irituia 17 km · Santa Maria do Pará 32 km · São Domingos do Capim 32 km · Ourém 42 km · Mãe do Rio 47 km · Capitão Poço 49 km · Aurora do Pará 57 km · Igarapé-Açu 57 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 do Guamá (-1.6267°, -47.4833°, elevation 9 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).