Rio Grande weather in August

In August, Rio Grande sees average daytime highs of 15°C and overnight lows near 13°C, with 108 mm of rain across 9.7 wet days and about 10.8 hours of daylight. It is the 11th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 15°C through the month. The sky is clear or mostly clear about 37% of the time in August, and the air most often feels dry.

Daylight stretches from about 10 h 24 min at the start of August to 11 h 18 min by month's end. Set against the rest of the year, August is Rio Grande's 7th-clearest and 6th-windiest month. For the whole year in context, see Rio Grande's year-round climate.

Daytime high
15°
11th warmest
Overnight low
13°
2nd coldest
Rainfall
108 mm
9.7 wet days
Daylight
10 h 48 min
8:08 AM – 6:57 PM
Cloud cover
56%
7th clearest
Wind
22 km/h
6th windiest
Solar energy
3.36 kWh/m²
Travel score
4.8
out of 10

Rio Grande is municipality of Rio Grande do Sul state, Brazil.

Density
67/km²
people per km²
Founded
1737

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 15°C through the month.

A typical August day in Rio Grande reaches about 15°C in the afternoon and slips back to 13°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 18°C. Set against its neighbours, August runs on par with July and about 1°C cooler than September.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11512
21512
31512
41512
51513
61513
71513
81513
91513
101513
111513
121513
131513
141513
151513
161513
171513
181513
191513
201613
211613
221613
231613
241613
251613
261613
271613
281614
291614
301614
311614

Rio Grande weather by month

How August compares with the rest of the year at a glance. August is the 11th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 22°878.613.97.4
Feb24° / 23°849.713.27.0
Mar24° / 22°921012.27.1
Apr21° / 19°11310.211.26.6
May19° / 16°1049.710.46.1
Jun16° / 14°1109.79.95.0
Jul15° / 12°11210.210.14.4
Aug15° / 13°1089.710.84.8
Sep16° / 14°12510.411.85.1
Oct18° / 17°12910.212.86.0
Nov21° / 19°877.713.66.8
Dec23° / 21°867.814.17.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24951
34852
44951
54951
64951
74951
85050
95149
105149
115149
125149
135149
145149
155149
165149
175050
185050
194951
204951
214852
224852
234852
244753
254753
264654
274654
284654
294654
304654
314654

Chance of precipitation in August

Any precipitation

Rio Grande gets around 108 mm of rain over 9.7 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 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
133
233
332
432
532
632
731
831
931
1030
1130
1230
1330
1429
1529
1629
1729
1829
1929
2029
2130
2230
2331
2432
2532
2633
2734
2835
2935
3036
3136

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 64% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
171272
271272
371272
471272
570273
671263
771263
871263
971263
1070264
1169274
1269274
1368275
1467285
1567285
1666295
1764306
1863316
1962326
2061327
2160337
2258348
2358348
2457358
2556359
2656359
2756359
28553510
29553510
30553510
31553510

Wind in August

Winds average 22 km/h in August.

Across August, daily wind ranges from about 22 km/h on the calmest days to 23 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
122breezy
222breezy
322breezy
422breezy
522breezy
622breezy
722breezy
822breezy
922breezy
1022breezy
1122breezy
1222breezy
1322breezy
1422breezy
1522breezy
1623breezy
1723breezy
1823breezy
1923breezy
2023breezy
2123breezy
2223breezy
2323breezy
2423breezy
2523breezy
2623breezy
2723breezy
2823breezy
2923breezy
3023breezy
3123breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 10 h 24 min at the start of August to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over August. Sunrise moves from 8:22 AM to 7:50 AM, and sunset from 6:47 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.48:226:47
210.48:216:48
310.58:206:48
410.58:206:49
510.58:196:50
610.58:186:50
710.68:176:51
810.68:166:52
910.68:156:52
1010.68:146:53
1110.78:136:54
1210.78:126:54
1310.78:116:55
1410.88:106:56
1510.88:096:56
1610.88:086:57
1710.88:076:58
1810.98:066:58
1910.98:056:59
2010.98:047:00
2111.08:027:00
2211.08:017:01
2311.08:007:02
2411.17:597:02
2511.17:587:03
2611.17:567:04
2711.27:557:04
2811.27:547:05
2911.27:537:05
3011.27:517:06
3111.37:507:07

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.36 kWh/m².

For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 7.08 kWh/m² in December across the year — August's 3.36 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
12.9Moderate
22.9Moderate
33.0Moderate
43.0Moderate
53.0Moderate
63.1Moderate
73.1Moderate
83.2Moderate
93.2Moderate
103.2Moderate
113.3Moderate
123.3Moderate
133.3Moderate
143.4Moderate
153.4Moderate
163.4Moderate
173.4Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.7Moderate
303.7Moderate
313.7Moderate
Planning a trip in August

Is August a good time to visit Rio Grande?

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

4.8
Sightseeing
11th-best month of the year
0.2
Beach & pool
11th-best month of the year

August is a reasonable time to visit Rio Grande for sightseeing.

What to pack for Rio Grande in August

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

In August, Rio Grande sees daytime highs around 15°C and nights near 13°C. Worth packing: a warm layer, rain gear and a windbreaker. About 10 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Rio Grande in August

The nearest coast averages about 14°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in February at about 24°C and coldest in July near 14°C.

It's comfortable for a long swim from Nov 18 to May 4 — about 5.5 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb24Warm
Mar24Refreshing
Apr22Refreshing
May19Cool
Jun16Cool
Jul14Bracing
Aug14Bracing
Sep15Cool
Oct18Cool
Nov20Cool
Dec22Refreshing

UV index in Rio Grande in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 5 — 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 Grande peaks around January 16 at about 12 (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 highModerateHighVery highExtremeJan 16UV 12Jun 19UV 3
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar9Very high
Apr7High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug5Moderate
Sep7High
Oct7Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Rio Grande?

Rio Grande sits at 32.0°S, 52.1°W, 7 m above sea level, in Brazil. The nearest listed city is São José do Norte, 6.0 km away.

Topography around Rio Grande

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

Within 3 km, the terrain around Rio Grande has only modest variations in elevation — a maximum elevation change of 11 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 33 m; within 80 km, significant variations in elevation — a maximum elevation change of 357 m.

The land around Rio Grande is covered by water (61%) and artificial surfaces (29%) within 3 km, water (52%) and grassland (20%) within 16 km, and water (48%) within 80 km.

3 km
11 m
16 km
33 m
80 km
357 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: São José do Norte 6.0 km · Pelotas 37 km · Capão do Leão 47 km · São Lourenço do Sul 75 km · Canguçu 90 km · Arroio Grande 96 km · Piratini 115 km · Jaguarão 134 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 Grande (-32.035°, -52.0986°, elevation 7 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).