Rosário do Sul weather in January

In January, Rosário do Sul sees average daytime highs of 31°C and overnight lows near 20°C, with 134 mm of rain across 11.5 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 43% of the time in January, and the air most often feels muggy.

Daylight stretches from about 13 h 54 min at the start of January to 13 h 30 min by month's end. Set against the rest of the year, January is Rosário do Sul's 4th-clearest and 7th-windiest month. For the whole year in context, see Rosário do Sul's year-round climate.

Daytime high
31°
1st warmest
Overnight low
20°
12th coldest
Rainfall
134 mm
11.5 wet days
Daylight
13 h 48 min
6:56 AM – 8:42 PM
Cloud cover
51%
4th clearest
Wind
13 km/h
7th windiest
Solar energy
6.7 kWh/m²
Travel score
4.5
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical January day in Rosário do Sul reaches about 31°C in the afternoon and slips back to 20°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 35°C. Set against its neighbours, January runs on par with December and about 1°C warmer than February.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13120
23120
33120
43120
53120
63120
73120
83120
93120
103120
113120
123120
133120
143120
153120
163120
173120
183120
193120
203120
213120
223120
233120
243120
253120
263120
273120
283120
293120
303120
313120

How January really feels in Rosário do Sul

Once humidity and wind are folded in, January averages 13 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
13
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Rosário do Sul weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 20°13411.513.74.5
Feb30° / 20°12910.313.14.9
Mar29° / 18°122912.25.9
Apr25° / 15°1519.311.37.0
May21° / 12°1148.710.56.7
Jun19° / 10°1309.410.16.1
Jul18° / 1299.410.26.2
Aug21° / 10°1168.610.96.8
Sep22° / 12°1559.911.86.7
Oct25° / 14°1891112.76.7
Nov28° / 16°1298.513.56.5
Dec30° / 19°1329.213.95.1

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25842
35842
45842
55842
65842
75941
86040
96040
106040
116040
126040
135941
145941
155941
165941
175941
185941
195941
205842
215842
225743
235743
245743
255743
265743
275644
285644
295545
305545
315545

Chance of precipitation in January

Any precipitation

Rosário do Sul gets around 134 mm of rain over 11.5 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
235
335
436
537
637
738
838
939
1039
1139
1239
1339
1438
1538
1637
1737
1836
1936
2036
2135
2235
2336
2436
2537
2637
2738
2838
2938
3039
3139

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
17142528251
27142528251
37142528261
47132528261
57132528261
67122529261
77122529261
87122530261
97112530251
107112531251
117112631251
127102632241
137102633241
14792633241
15692734230
16692734230
17692735230
18692735230
19692735230
20692735230
21692735230
225102635230
235102635240
244102636240
254102536250
264102536250
273102436260
283102435270
293112335281
303112335281
313112235291

Wind in January

Winds average 13 km/h in January.

Across January, 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.

051015151015202531
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 January

DaylightNight

Daylight runs from about 13 h 54 min at the start of January to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over January. Sunrise moves from 6:45 AM to 7:09 AM, and sunset from 8:40 PM to 8:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.96:458:40
213.96:468:41
313.96:478:41
413.96:478:41
513.96:488:41
613.96:498:41
713.96:498:42
813.96:508:42
913.86:518:42
1013.86:528:42
1113.86:528:42
1213.86:538:42
1313.86:548:42
1413.86:558:42
1513.86:568:42
1613.86:568:42
1713.76:578:41
1813.76:588:41
1913.76:598:41
2013.77:008:41
2113.77:008:41
2213.77:018:40
2313.67:028:40
2413.67:038:40
2513.67:048:39
2613.67:058:39
2713.67:068:39
2813.57:068:38
2913.57:078:38
3013.57:088:37
3113.57:098:37

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 6.7 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 6.95 kWh/m² in December across the year — January's 6.7 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
76.9Intense
86.8Intense
96.8Intense
106.8Intense
116.8Intense
126.8Intense
136.8Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.6Intense
216.6Intense
226.6Intense
236.6Intense
246.5Intense
256.5Intense
266.5Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
316.3Intense
Planning a trip in January

Is January a good time to visit Rosário do Sul?

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

4.5
Sightseeing
12th-best month of the year
6.6
Beach & pool
5th-best month of the year

January is a reasonable time to visit Rosário do Sul for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Rosário do Sul in January

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

In January, Rosário do Sul sees daytime highs around 31°C and nights near 20°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in Rosário do Sul in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rosário do Sul peaks around January 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 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 18UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar10Very high
Apr7Very high
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep7Very high
Oct7Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Rosário do Sul?

Rosário do Sul sits at 30.3°S, 54.9°W, 123 m above sea level, in Brazil. The nearest listed city is São Gabriel, 58 km away.

Topography around Rosário do Sul

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rosário do Sul.

Within 3 km, the terrain around Rosário do Sul has only modest variations in elevation — a maximum elevation change of 76 m around an average of 102 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 119 m; within 80 km, significant variations in elevation — a maximum elevation change of 306 m.

The land around Rosário do Sul is covered by trees (35%), grassland (25%) and artificial surfaces (20%) within 3 km, grassland (43%) and cropland (38%) within 16 km, and grassland (55%) and cropland (31%) within 80 km.

3 km
76 m
16 km
119 m
80 km
306 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
January weather nearby: São Gabriel 58 km · São Francisco de Assis 81 km · Dom Pedrito 84 km · Sant'Ana do Livramento 92 km · Rivera 94 km · Alegrete 100 km · São Pedro do Sul 100 km · Santiago 119 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 Rosário do Sul (-30.2583°, -54.9142°, elevation 123 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).