Santo Ângelo weather in December

In December, Santo Ângelo sees average daytime highs of 30°C and overnight lows near 19°C, with 179 mm of rain across 12.8 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 40% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 42 min at the start of December to 13 h 48 min by month's end. Set against the rest of the year, December is Santo Ângelo's 7th-clearest and 7th-windiest month. For the whole year in context, see Santo Ângelo's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
19°
10th coldest
Rainfall
179 mm
12.8 wet days
Daylight
13 h 48 min
6:40 AM – 8:27 PM
Cloud cover
54%
7th clearest
Wind
11 km/h
7th windiest
Solar energy
6.65 kWh/m²
Travel score
4.5
out of 10

Santo Ângelo 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 30°C through the month.

A typical December day in Santo Ângelo reaches about 30°C in the afternoon and slips back to 19°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 35°C. Set against its neighbours, December runs about 2°C warmer than November and on par with January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13018
23019
33019
43019
53019
63019
73019
83019
93019
103019
113019
123019
133019
143019
153019
163119
173119
183120
193120
203120
213120
223120
233120
243120
253120
263120
273120
283120
293120
303120
313120

How December really feels in Santo Ângelo

Once humidity and wind are folded in, December averages 5 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
5
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.

Santo Ângelo weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 20°16714.313.64.3
Feb30° / 20°15714134.5
Mar29° / 19°13511.612.25.4
Apr26° / 16°16910.111.36.7
May22° / 13°1519.310.66.9
Jun20° / 12°1439.810.26.4
Jul20° / 10°1579.710.46.5
Aug22° / 12°1048.6117.1
Sep24° / 14°15910.611.86.9
Oct26° / 16°23613.512.76.1
Nov29° / 17°1621113.45.6
Dec30° / 19°17912.813.84.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 45%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35644
45644
55644
65644
75545
85545
95545
105545
115545
125545
135545
145545
155644
165644
175644
185644
195644
205644
215644
225545
235545
245545
255545
265545
275545
285545
295545
305545
315545

Chance of precipitation in December

Any precipitation

Santo Ângelo gets around 179 mm of rain over 12.8 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 41% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
138
238
338
439
539
639
739
839
939
1039
1139
1239
1339
1440
1540
1640
1741
1841
1941
2041
2142
2242
2343
2444
2544
2644
2745
2845
2945
3045
3145

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 50% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11421273350
21321273360
31321273360
41321273460
51220273460
61220273470
71219273470
81219273580
91119273580
101118273590
111118273590
1210172835100
1310172835110
149162835120
159162735130
168152734150
178152734160
187142734170
197142733190
207142733200
216132733210
226132632230
235122632240
245122632260
254122631270
264112531281
274112530291
283112530301
293102630301
303102629311
313102629321

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 42 min at the start of December to 13 h 48 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 6:37 AM to 6:47 AM, and sunset from 8:17 PM to 8:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.76:378:17
213.76:378:18
313.76:378:18
413.76:378:19
513.76:378:20
613.76:378:20
713.76:378:21
813.76:378:22
913.76:388:23
1013.86:388:23
1113.86:388:24
1213.86:388:24
1313.86:398:25
1413.86:398:26
1513.86:398:26
1613.86:408:27
1713.86:408:27
1813.86:408:28
1913.86:418:29
2013.86:418:29
2113.86:428:30
2213.86:428:30
2313.86:438:30
2413.86:438:31
2513.86:448:31
2613.86:448:32
2713.86:458:32
2813.86:458:33
2913.86:468:33
3013.86:468:33
3113.86:478:33

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.65 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.58 kWh/m² to a high of 6.65 kWh/m² in December across the year — December's 6.65 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.6Intense
226.6Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.6Intense
306.6Intense
316.6Intense
Planning a trip in December

Is December a good time to visit Santo Ângelo?

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

4.5
Sightseeing
10th-best month of the year
6.4
Beach & pool
4th-best month of the year

December is a reasonable time to visit Santo Ângelo for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Santo Ângelo in December

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

In December, Santo Ângelo sees daytime highs around 30°C and nights near 19°C. Pack light clothes and sun protection. Worth having: rain gear. About 13 days see rain.

light clothessun protectionrain gear

UV index in Santo Ângelo 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 Santo Ângelo peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeJan 20UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun4Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct7High
Nov11Extreme
Dec12Extreme

Air quality in Santo Ângelo 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 Santo Ângelo is worst in September — around 15 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (March, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1515 µg/m³Mar 166 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar6Good
Apr6Good
May6Good
Jun7Good
Jul7Good
Aug10Good
Sep15Moderate
Oct9Good
Nov6Good
Dec6Good
Location & terrain

Where is Santo Ângelo?

Santo Ângelo sits at 28.3°S, 54.3°W, 295 m above sea level, in Brazil. The nearest listed city is Giruá, 31 km away.

Topography around Santo Ângelo

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

Within 3 km, the terrain around Santo Ângelo has only modest variations in elevation — a maximum elevation change of 122 m around an average of 254 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 241 m; within 80 km, significant variations in elevation — a maximum elevation change of 481 m.

The land around Santo Ângelo is covered by artificial surfaces (42%) and trees (33%) within 3 km, cropland (58%) and trees (29%) within 16 km, and cropland (69%) and trees (20%) within 80 km.

3 km
122 m
16 km
241 m
80 km
481 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Giruá 31 km · Ijuí 35 km · Santa Rosa 52 km · Três de Maio 59 km · Santo Cristo 66 km · São Luiz Gonzaga 69 km · Panambi 75 km · Cruz Alta 75 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 Santo Ângelo (-28.2992°, -54.2631°, elevation 295 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).