São Francisco de Assis weather in December

In December, São Francisco de Assis sees average daytime highs of 30°C and overnight lows near 19°C, with 136 mm of rain across 10.2 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 30°C in the first days to 31°C by the end. The sky is clear or mostly clear about 43% 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 São Francisco de Assis's 6th-clearest and 7th-windiest month. For the whole year in context, see São Francisco de Assis's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
19°
10th coldest
Rainfall
136 mm
10.2 wet days
Daylight
13 h 54 min
6:40 AM – 8:33 PM
Cloud cover
51%
6th clearest
Wind
13 km/h
7th windiest
Solar energy
6.9 kWh/m²
Travel score
4.9
out of 10

São Francisco de Assis 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

Highs climb over the month, from about 30°C in the first days to 31°C by the end.

A typical December day in São Francisco de Assis 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 3°C warmer than November and on par with January.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12918
22918
33018
43018
53018
63018
73018
83019
93019
103019
113019
123019
133019
143019
153019
163019
173119
183119
193120
203120
213120
223120
233120
243120
253120
263120
273120
283120
293120
303120
313120

How December really feels in São Francisco de Assis

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.

São Francisco de Assis weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 21°14912.113.74.3
Feb30° / 20°13211.513.14.7
Mar29° / 19°12110.212.25.7
Apr26° / 16°1489.811.36.9
May22° / 13°1168.610.56.8
Jun20° / 11°1289.610.16.3
Jul19° / 10°1249.410.36.4
Aug21° / 11°1198.410.97.0
Sep23° / 13°1449.811.86.8
Oct25° / 15°21211.612.76.6
Nov28° / 17°1399.513.56.2
Dec30° / 19°13610.213.94.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55941
65941
75941
85941
95941
105842
115842
125842
135842
145743
155743
165644
175545
185545
195545
205446
215446
225446
235446
245545
255545
265545
275545
285644
295644
305743
315743

Chance of precipitation in December

Any precipitation

São Francisco de Assis gets around 136 mm of rain over 10.2 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 33% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
131
231
331
431
531
631
731
831
931
1031
1131
1231
1331
1432
1532
1633
1733
1834
1934
2034
2134
2235
2335
2435
2535
2635
2735
2835
2935
3035
3135

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 45% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11526272660
21525272760
31525272760
41524272770
51524272770
61523272870
71523272870
81522272980
91422262980
101421263090
111421263090
1213212630100
1313202631100
1412202632110
1512192632110
1611192633120
1710182533130
1810182533140
199172533151
209172434161
218172434171
228172334181
237162333191
247162333201
256162233211
266162232221
276162231232
286162231242
296162230252
305152230262
315152230262

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light 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
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

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 6:38 AM to 6:48 AM, and sunset from 8:23 PM to 8:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.86:388:23
213.86:388:24
313.86:388:25
413.86:388:25
513.86:388:26
613.86:388:27
713.86:388:27
813.86:388:28
913.86:388:29
1013.96:388:30
1113.96:398:30
1213.96:398:31
1313.96:398:31
1413.96:398:32
1513.96:408:33
1613.96:408:33
1713.96:408:34
1813.96:418:34
1913.96:418:35
2013.96:428:35
2113.96:428:36
2213.96:438:36
2313.96:438:37
2413.96:448:37
2513.96:448:38
2613.96:458:38
2713.96:458:39
2813.96:468:39
2913.96:468:39
3013.96:478:40
3113.96:488:40

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.9 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 6.9 kWh/m² in December across the year — December's 6.9 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.9Intense
56.9Intense
66.9Intense
77.0Intense
87.0Intense
97.0Intense
107.0Intense
117.0Intense
126.9Intense
136.9Intense
146.9Intense
156.9Intense
166.9Intense
176.9Intense
186.9Intense
196.9Intense
206.9Intense
216.9Intense
226.8Intense
236.8Intense
246.8Intense
256.8Intense
266.8Intense
276.8Intense
286.8Intense
296.8Intense
306.9Intense
316.9Intense
Planning a trip in December

Is December a good time to visit São Francisco de Assis?

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

4.9
Sightseeing
10th-best month of the year
6.9
Beach & pool
3rd-best month of the year

December is a reasonable time to visit São Francisco de Assis for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for São Francisco de Assis in December

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

In December, São Francisco de Assis sees daytime highs around 30°C and nights near 19°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in São Francisco de Assis 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 Francisco de Assis 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 highModerateHighExtremeJan 19UV 13Jun 18UV 3
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar10Very high
Apr8Very high
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct5High
Nov11Extreme
Dec12Extreme
Location & terrain

Where is São Francisco de Assis?

São Francisco de Assis sits at 29.6°S, 55.1°W, 134 m above sea level, in Brazil. The nearest listed city is Santiago, 47 km away.

Topography around São Francisco de Assis

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

Within 3 km, the terrain around São Francisco de Assis has only modest variations in elevation — a maximum elevation change of 137 m around an average of 132 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 320 m; within 80 km, significant variations in elevation — a maximum elevation change of 398 m.

The land around São Francisco de Assis is covered by grassland (32%), cropland (31%) and trees (27%) within 3 km, grassland (37%), trees (31%) and cropland (30%) within 16 km, and grassland (49%) and cropland (32%) within 80 km.

3 km
137 m
16 km
320 m
80 km
398 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Santiago 47 km · Alegrete 69 km · Rosário do Sul 81 km · São Pedro do Sul 92 km · São Gabriel 117 km · São Luiz Gonzaga 128 km · Santa Maria 129 km · São Borja 130 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 Francisco de Assis (-29.5503°, -55.1311°, elevation 134 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).