Arroio Grande weather in January

In January, Arroio Grande sees average daytime highs of 28°C and overnight lows near 20°C, with 111 mm of rain across 10.6 wet days and about 13.9 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 35% of the time in January, and the air most often feels muggy.

Daylight stretches from about 14 h 06 min at the start of January to 13 h 36 min by month's end. Set against the rest of the year, January is Arroio Grande's 4th-clearest and 5th-windiest month. For the whole year in context, see Arroio Grande's year-round climate.

Daytime high
28°
1st warmest
Overnight low
20°
12th coldest
Rainfall
111 mm
10.6 wet days
Daylight
13 h 54 min
6:45 AM – 8:39 PM
Cloud cover
55%
4th clearest
Wind
15 km/h
5th windiest
Solar energy
6.61 kWh/m²
Travel score
6.3
out of 10

Arroio Grande is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical January day in Arroio Grande reaches about 28°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, January runs about 1°C warmer than December and on par with February.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12820
22820
32820
42820
52820
62820
72820
82820
92820
102820
112820
122820
132820
142820
152820
162820
172820
182820
192820
202820
212820
222820
232820
242820
252820
262820
272820
282820
292820
302820
312820

Arroio Grande 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
Jan28° / 20°11110.613.96.3
Feb27° / 20°10711.213.26.1
Mar26° / 19°1039.912.26.7
Apr23° / 16°1249.811.26.9
May20° / 13°96910.46.4
Jun17° / 10°1109.39.95.5
Jul16° / 1079.310.15.3
Aug18° / 10°1078.910.86.0
Sep19° / 12°12410.211.86.0
Oct22° / 14°13310.412.86.4
Nov24° / 16°988.213.77.2
Dec27° / 18°969.514.16.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 17% of January, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35347
45347
55347
65347
75347
85347
95248
105248
115248
125248
135347
145347
155347
165347
175347
185248
195248
205149
215149
225248
235248
245248
255248
265149
275149
285050
295050
305050
315050

Chance of precipitation in January

Any precipitation

Arroio Grande gets around 111 mm of rain over 10.6 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 35% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
131
231
332
432
532
632
733
833
933
1033
1133
1233
1333
1433
1533
1634
1734
1834
1934
2034
2135
2235
2336
2437
2537
2638
2739
2839
2940
3040
3141

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
15162235210
25162235210
35162235210
45162235220
55162235220
65162235220
75152235220
85152335220
95152336220
105152336210
116142336210
126142337200
136142337200
146142338200
156142338200
166142338200
176132338200
186132338200
196132337210
206132337210
215132237220
225132236230
235132236230
245132236241
254132135251
264132135261
274132135271
283132134281
293132134281
303132133291
313132133291

Wind in January

Winds average 15 km/h in January.

Across January, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 14 h 06 min at the start of January to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over January. Sunrise moves from 6:33 AM to 6:58 AM, and sunset from 8:38 PM to 8:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.16:338:38
214.16:348:38
314.16:348:38
414.16:358:39
514.06:368:39
614.06:378:39
714.06:378:39
814.06:388:39
914.06:398:39
1014.06:408:39
1114.06:418:39
1214.06:418:39
1313.96:428:39
1413.96:438:39
1513.96:448:39
1613.96:458:39
1713.96:468:38
1813.96:468:38
1913.86:478:38
2013.86:488:38
2113.86:498:37
2213.86:508:37
2313.86:518:37
2413.76:528:36
2513.76:538:36
2613.76:548:36
2713.76:548:35
2813.76:558:35
2913.66:568:34
3013.66:578:34
3113.66:588:33

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 6.61 kWh/m².

For context, solar energy here swings from a low near 2.3 kWh/m² to a high of 6.9 kWh/m² in December across the year — January's 6.61 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.8Intense
76.8Intense
86.8Intense
96.8Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.6Intense
166.6Intense
176.6Intense
186.6Intense
196.6Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.4Intense
256.4Intense
266.4Intense
276.3Intense
286.3Intense
296.3Intense
306.2Intense
316.2Intense
Planning a trip in January

Is January a good time to visit Arroio Grande?

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

6.3
Sightseeing
7th-best month of the year
6.7
Beach & pool
1st-best month of the year

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

What to pack for Arroio Grande in January

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

In January, Arroio Grande sees daytime highs around 28°C and nights near 20°C. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

UV index in Arroio Grande 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 Arroio Grande peaks around January 15 at about 12 (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 — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighExtremeJan 15UV 12Jun 18UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep7High
Oct7High
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Arroio Grande?

Arroio Grande sits at 32.2°S, 53.1°W, 31 m above sea level, in Brazil. The nearest listed city is Jaguarão, 46 km away.

Topography around Arroio Grande

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

Within 3 km, the terrain around Arroio Grande has only modest variations in elevation — a maximum elevation change of 62 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 240 m; within 80 km, significant variations in elevation — a maximum elevation change of 480 m.

The land around Arroio Grande is covered by cropland (34%), trees (27%) and grassland (26%) within 3 km, cropland (48%), grassland (25%) and trees (24%) within 16 km, and grassland (35%), cropland (22%) and trees (20%) within 80 km.

3 km
62 m
16 km
240 m
80 km
480 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Jaguarão 46 km · Capão do Leão 78 km · Pelotas 87 km · Piratini 88 km · Rio Grande 96 km · Canguçu 101 km · São José do Norte 101 km · Melo 102 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 Arroio Grande (-32.2375°, -53.0869°, elevation 31 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).