Rio do Sul weather in August

In August, Rio do Sul sees average daytime highs of 20°C and overnight lows near 10°C, with 94 mm of rain across 9.6 wet days and about 11 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 21°C by the end. The sky is clear or mostly clear about 31% of the time in August, and the air most often feels dry.

Daylight stretches from about 10 h 42 min at the start of August to 11 h 24 min by month's end. Set against the rest of the year, August is Rio do Sul's 1st-clearest and 6th-windiest month. For the whole year in context, see Rio do Sul's year-round climate.

Daytime high
20°
10th warmest
Overnight low
10°
3rd coldest
Rainfall
94 mm
9.6 wet days
Daylight
11 hours
7:52 AM – 6:54 PM
Cloud cover
61%
1st clearest
Wind
6 km/h
6th windiest
Solar energy
3.46 kWh/m²
Travel score
6.4
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 21°C by the end.

A typical August day in Rio do Sul reaches about 20°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 26°C. Set against its neighbours, August runs about 2°C warmer than July and about 1°C cooler than September.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1199
2199
3199
42010
52010
62010
72010
82010
92010
102010
112010
122010
132010
142010
152010
162010
172011
182111
192111
202111
212111
222111
232111
242111
252111
262111
272111
282111
292111
302211
312212

Rio do Sul weather by month

How August compares with the rest of the year at a glance. August is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°18420.413.54.7
Feb28° / 19°15418.3134.8
Mar27° / 18°10515.212.25.6
Apr24° / 15°829.411.46.8
May21° / 12°1059.110.76.5
Jun19° / 10°1119.810.36.0
Jul19° / 991010.56.0
Aug20° / 10°949.6116.4
Sep22° / 13°15112.411.86.0
Oct23° / 15°15015.112.75.7
Nov25° / 16°12114.813.35.8
Dec27° / 18°14916.513.75.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of August, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24456
34456
44456
54456
64357
74357
84258
94258
104159
114060
124060
134060
144060
154159
164159
174258
184258
194357
204456
214456
224654
234654
244753
254852
264852
274852
284852
294753
304753
314753

Chance of precipitation in August

Any precipitation

Rio do Sul gets around 94 mm of rain over 9.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 31% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
131
231
331
431
531
631
731
831
931
1031
1131
1231
1331
1431
1531
1631
1731
1831
1931
2030
2130
2230
2330
2430
2530
2630
2730
2830
2930
3031
3131

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1623440
2613450
3613450
4613450
5613450
6603460
7593560
8593560
9573670
10573670
11563770
12553870
13533980
14524080
15514180
16504280
17504280
18494380
19484480
20474490
21464590
224545100
234545100
244444110
254444120
264343130
274343141
284342141
294341151
304340161
314240171

Wind in August

Winds average 6 km/h in August.

Across August, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 10 h 42 min at the start of August to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over August. Sunrise moves from 8:04 AM to 7:36 AM, and sunset from 6:46 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.78:046:46
210.78:036:46
310.78:026:47
410.88:026:47
510.88:016:48
610.88:006:48
710.87:596:49
810.87:596:49
910.97:586:50
1010.97:576:50
1110.97:566:51
1210.97:556:51
1311.07:556:52
1411.07:546:52
1511.07:536:53
1611.07:526:54
1711.17:516:54
1811.17:506:55
1911.17:496:55
2011.17:486:56
2111.27:476:56
2211.27:466:57
2311.27:456:57
2411.27:446:57
2511.37:436:58
2611.37:426:58
2711.37:416:59
2811.37:406:59
2911.47:397:00
3011.47:387:00
3111.47:367:01

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.46 kWh/m².

For context, solar energy here swings from a low near 2.5 kWh/m² to a high of 5.6 kWh/m² in December across the year — August's 3.46 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.1Moderate
23.1Moderate
33.1Moderate
43.1Moderate
53.2Moderate
63.2Moderate
73.2Moderate
83.2Moderate
93.2Moderate
103.3Moderate
113.3Moderate
123.3Moderate
133.3Moderate
143.3Moderate
153.4Moderate
163.4Moderate
173.4Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
313.8Moderate
Planning a trip in August

Is August a good time to visit Rio do Sul?

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

6.4
Sightseeing
3rd-best month of the year
3.6
Beach & pool
10th-best month of the year

August is a reasonable time to visit Rio do Sul for sightseeing.

What to pack for Rio do Sul in August

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

In August, Rio do Sul sees daytime highs around 20°C and nights near 10°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Rio do Sul in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rio do Sul peaks around January 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 19UV 14Jul 10UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5Moderate
Jul5Moderate
Aug6High
Sep8Very high
Oct9Very high
Nov12Extreme
Dec13Extreme

Air quality in Rio do Sul in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Rio do Sul is worst in September — around 15 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 10 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 915 µg/m³Dec 1710 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar10Good
Apr11Good
May13Moderate
Jun13Moderate
Jul14Moderate
Aug15Moderate
Sep15Moderate
Oct12Good
Nov10Good
Dec10Good
Location & terrain

Where is Rio do Sul?

Rio do Sul sits at 27.2°S, 49.6°W, 346 m above sea level, in Brazil. The nearest listed city is Presidente Getúlio, 18 km away.

Topography around Rio do Sul

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

Within 3 km, the terrain around Rio do Sul has significant variations in elevation — a maximum elevation change of 353 m around an average of 424 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 703 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,735 m.

The land around Rio do Sul is covered by trees (51%) and artificial surfaces (35%) within 3 km, trees (65%) and grassland (21%) within 16 km, and trees (80%) within 80 km.

3 km
353 m
16 km
703 m
80 km
1,735 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Presidente Getúlio 18 km · Ibirama 21 km · Ituporanga 23 km · Pouso Redondo 29 km · Taió 37 km · Indaial 54 km · Otacílio Costa 56 km · Timbó 57 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 Rio do Sul (-27.2142°, -49.6431°, elevation 346 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).