Rio Grande weather in October

In October, Rio Grande sees average daytime highs of 18°C and overnight lows near 17°C, with 129 mm of rain across 10.2 wet days and about 12.8 hours of daylight. It is the 8th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 19°C by the end. The sky is clear or mostly clear about 35% of the time in October, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of October to 13 h 18 min by month's end. Set against the rest of the year, October is Rio Grande's 12th-clearest and 1st-windiest month. For the whole year in context, see Rio Grande's year-round climate.

Daytime high
18°
8th warmest
Overnight low
17°
6th coldest
Rainfall
129 mm
10.2 wet days
Daylight
12 h 48 min
6:49 AM – 7:37 PM
Cloud cover
61%
12th clearest
Wind
24 km/h
1st windiest
Solar energy
5.32 kWh/m²
Travel score
6.0
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 October

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 17°C in the first days to 19°C by the end.

A typical October day in Rio Grande reaches about 18°C in the afternoon and slips back to 17°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 20°C. Set against its neighbours, October runs about 2°C warmer than September and about 2°C cooler than November.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11715
21715
31715
41716
51816
61816
71816
81816
91816
101816
111816
121816
131816
141816
151817
161917
171917
181917
191917
201917
211917
221917
231917
241917
251917
261917
271917
281917
291917
301917
312018

Rio Grande weather by month

How October compares with the rest of the year at a glance. October is the 8th-warmest and 1st-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 October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in October, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of October, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24555
34357
44357
54258
64357
74357
84357
94357
104357
114456
124555
134555
144555
154555
164753
174852
184852
194852
204852
214951
224951
235050
245050
255050
265050
275149
285149
295149
305149
315149

Chance of precipitation in October

Any precipitation

Rio Grande gets around 129 mm of rain over 10.2 wet days in October, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 32% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
234
334
434
535
635
735
834
934
1034
1134
1233
1333
1433
1533
1632
1732
1832
1932
2032
2132
2231
2331
2431
2531
2630
2730
2830
2930
3029
3129

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14337201
24237211
34037221
43937231
53836241
63736252
73635272
83535282
93534293
103433303
113432313
123332314
133331324
143231334
153131335
163130345
173030355
183029356
193029366
202928367
212928367
222927368
233027359
243026359
2530263410
2630253410
2730253411
2830253412
2930243312
3030243313
3130233314

Wind in October

Winds average 24 km/h in October, the windiest month of the year.

Across October, daily wind ranges from about 24 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
124breezy
224breezy
324breezy
424breezy
524breezy
624breezy
724breezy
824breezy
924breezy
1024breezy
1124breezy
1224breezy
1324breezy
1424breezy
1524breezy
1624breezy
1724breezy
1824breezy
1924breezy
2024breezy
2124breezy
2224breezy
2324breezy
2424breezy
2524breezy
2624breezy
2724breezy
2824breezy
2924breezy
3024breezy
3124breezy

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 18 min at the start of October to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over October. Sunrise moves from 7:08 AM to 6:34 AM, and sunset from 7:27 PM to 7:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.37:087:27
212.37:077:27
312.47:057:28
412.47:047:29
512.47:037:29
612.57:027:30
712.57:007:31
812.56:597:32
912.66:587:32
1012.66:577:33
1112.66:557:34
1212.76:547:34
1312.76:537:35
1412.76:527:36
1512.86:517:37
1612.86:497:37
1712.86:487:38
1812.96:477:39
1912.96:467:40
2012.96:457:41
2113.06:447:41
2213.06:437:42
2313.06:427:43
2413.16:417:44
2513.16:407:45
2613.16:397:45
2713.16:387:46
2813.26:377:47
2913.26:367:48
3013.26:357:49
3113.36:347:50

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.32 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 — October's 5.32 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.9Bright
54.9Bright
64.9Bright
75.0Bright
85.0Bright
95.0Bright
105.1Bright
115.1Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.4Bright
185.4Bright
195.5Bright
205.5Bright
215.6Bright
225.6Bright
235.7Bright
245.7Bright
255.7Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
305.9Bright
316.0Bright
Planning a trip in October

Is October a good time to visit Rio Grande?

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

6.0
Sightseeing
8th-best month of the year
2.3
Beach & pool
8th-best month of the year

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

What to pack for Rio Grande in October

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

In October, Rio Grande sees daytime highs around 18°C and nights near 17°C. Worth packing: rain gear, sun protection and a windbreaker. About 10 days see rain.

rain gearsun protectiona windbreaker

Sea temperature near Rio Grande in October

The nearest coast averages about 18°C in October — 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 October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 7 — 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
October 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).