Santa Maria weather in December

In December, Santa Maria sees average daytime highs of 30°C and overnight lows near 18°C, with 158 mm of rain across 11.8 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 30°C by the end. 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 48 min at the start of December to 13 h 54 min by month's end. Set against the rest of the year, December is Santa Maria's 2nd-clearest and 5th-windiest month. For the whole year in context, see Santa Maria's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
18°
10th coldest
Rainfall
158 mm
11.8 wet days
Daylight
13 h 54 min
6:35 AM – 8:28 PM
Cloud cover
54%
2nd clearest
Wind
10 km/h
5th windiest
Solar energy
6.72 kWh/m²
Travel score
5.1
out of 10

Santa Maria 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

Highs climb over the month, from about 29°C in the first days to 30°C by the end.

A typical December day in Santa Maria reaches about 30°C in the afternoon and slips back to 18°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 34°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)
12917
22917
32917
42917
52917
62917
72918
82918
92918
102918
112918
122918
132918
143018
153018
163018
173018
183018
193019
203019
213019
223019
233019
243019
253019
263019
273019
283019
293019
303019
313019

Santa Maria weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 20°15913.813.74.6
Feb29° / 19°14412.513.14.9
Mar28° / 18°12411.312.25.8
Apr25° / 15°14410.111.36.8
May21° / 12°1279.610.56.6
Jun19° / 10°13710.110.16.1
Jul19° / 14910.310.36.1
Aug21° / 11°1229.910.96.6
Sep22° / 12°15810.911.86.5
Oct24° / 14°20812.512.76.4
Nov27° / 16°13710.213.56.4
Dec30° / 18°15811.813.95.1

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 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25644
35545
45545
55446
65446
75446
85446
95446
105446
115347
125347
135446
145446
155446
165446
175446
185446
195545
205545
215545
225545
235545
245545
255545
265446
275545
285446
295446
305545
315545

Chance of precipitation in December

Any precipitation

Santa Maria gets around 158 mm of rain over 11.8 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 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
337
437
537
637
737
837
937
1037
1136
1236
1337
1437
1537
1638
1738
1838
1939
2039
2139
2239
2339
2439
2539
2640
2740
2840
2940
3040
3140

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 48% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11225292670
21225292770
31224292770
41224292870
51223292880
61223292980
71222282990
81122283090
911212830100
1011212830100
1110202831110
1210202731110
1310192732120
149192732130
159182733140
168172633150
178172634160
188162634170
197152534180
207152534190
216142534200
226142534210
236142434221
245132434231
255132433241
264132433251
274122433261
284122433261
293122432271
303122432281
313112532281

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 48 min at the start of December to 13 h 54 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 6:32 AM to 6:42 AM, and sunset from 8:18 PM to 8:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.86:328:18
213.86:328:19
313.86:328:20
413.86:328:20
513.86:328:21
613.86:328:22
713.86:328:22
813.86:328:23
913.96:338:24
1013.96:338:25
1113.96:338:25
1213.96:338:26
1313.96:348:26
1413.96:348:27
1513.96:348:28
1613.96:358:28
1713.96:358:29
1813.96:358:29
1913.96:368:30
2013.96:368:30
2113.96:378:31
2213.96:378:31
2313.96:378:32
2413.96:388:32
2513.96:388:33
2613.96:398:33
2713.96:408:34
2813.96:408:34
2913.96:418:34
3013.96:418:35
3113.96:428:35

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.72 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 6.72 kWh/m² in December across the year — December's 6.72 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
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
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.6Intense
316.6Intense
Planning a trip in December

Is December a good time to visit Santa Maria?

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

5.1
Sightseeing
10th-best month of the year
6.7
Beach & pool
2nd-best month of the year

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

What to pack for Santa Maria in December

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

In December, Santa Maria sees daytime highs around 30°C and nights near 18°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in Santa Maria 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 Santa Maria peaks around January 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeJan 19UV 13Jun 18UV 3
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar10Extreme
Apr8Very high
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct7High
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Santa Maria?

Santa Maria sits at 29.7°S, 53.8°W, 146 m above sea level, in Brazil. The nearest listed city is São Pedro do Sul, 37 km away.

Topography around Santa Maria

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

Within 3 km, the terrain around Santa Maria has significant variations in elevation — a maximum elevation change of 300 m around an average of 129 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 445 m; within 80 km, significant variations in elevation — a maximum elevation change of 589 m.

The land around Santa Maria is covered by artificial surfaces (53%) and trees (38%) within 3 km, trees (42%) and grassland (33%) within 16 km, and cropland (47%), grassland (27%) and trees (24%) within 80 km.

3 km
300 m
16 km
445 m
80 km
589 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: São Pedro do Sul 37 km · Júlio de Castilhos 52 km · Agudo 55 km · São Sepé 58 km · Tupanciretã 67 km · São Gabriel 88 km · Cachoeira do Sul 96 km · Caçapava do Sul 97 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 Santa Maria (-29.6842°, -53.8069°, elevation 146 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).