Rio Claro weather in October

In October, Rio Claro sees average daytime highs of 26°C and overnight lows near 18°C, with 115 mm of rain across 16.1 wet days and about 12.5 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 16% of the time in October, and the air most often feels humid.

Daylight stretches from about 12 h 12 min at the start of October to 12 h 48 min by month's end. Set against the rest of the year, October is Rio Claro's 9th-clearest and 2nd-windiest month. For the whole year in context, see Rio Claro's year-round climate.

Daytime high
26°
7th warmest
Overnight low
18°
6th coldest
Rainfall
115 mm
16.1 wet days
Daylight
12 h 30 min
6:25 AM – 6:58 PM
Cloud cover
73%
9th clearest
Wind
6 km/h
2nd windiest
Solar energy
5.04 kWh/m²
Travel score
5.5
out of 10

Rio Claro is Place in Brasil.

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical October day in Rio Claro reaches about 26°C in the afternoon and slips back to 18°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 31°C. Set against its neighbours, October runs about 1°C warmer than September and on par with November.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12517
22517
32517
42617
52617
62617
72617
82617
92618
102618
112618
122618
132618
142618
152618
162618
172618
182618
192618
202618
212618
222618
232618
242618
252618
262618
272618
282618
292618
302618
312618

Rio Claro weather by month

How October compares with the rest of the year at a glance. October is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°2952413.23.8
Feb29° / 21°2042012.83.9
Mar28° / 20°20122.812.24.4
Apr26° / 19°10214.111.55.9
May24° / 16°6310.710.96.8
Jun24° / 15°356.710.67.6
Jul23° / 14°40710.77.6
Aug24° / 15°367.311.27.6
Sep25° / 16°7812.111.96.4
Oct26° / 18°11516.112.55.5
Nov26° / 19°18820.413.14.8
Dec28° / 20°23723.113.44.3

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 12% of October, with mostly cloudy or overcast conditions the remaining 72%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
22971
33070
43070
53169
63070
73070
83070
93169
103169
113268
123169
133169
143070
153070
162971
172872
182971
192872
202773
212872
222773
232773
242674
252674
262575
272476
282476
292476
302476
312377

Chance of precipitation in October

Any precipitation

Rio Claro gets around 115 mm of rain over 16.1 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 53% and peaks near 62% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
148
247
347
446
546
645
745
845
945
1046
1146
1247
1348
1449
1550
1651
1752
1853
1954
2056
2157
2258
2359
2460
2560
2661
2761
2861
2962
3062
3162

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the humid band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 39% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
152346260
252345270
352245280
452245280
552144300
652144310
752044320
842043330
941942340
1041942350
1141941350
1241941360
1341841371
1431841381
1531740391
1631740391
1721640401
1821540411
1921540421
2021440431
2121439441
2211439451
2311439451
2411438451
2511438461
2611438461
2711437471
2821337471
2921336481
3021336491
3121236491

Wind in October

Winds average 6 km/h in October.

Across October, 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 October

DaylightNight

Daylight runs from about 12 h 12 min at the start of October to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over October. Sunrise moves from 6:39 AM to 6:15 AM, and sunset from 6:52 PM to 7:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:396:52
212.26:386:52
312.36:376:52
412.36:366:53
512.36:356:53
612.36:346:54
712.36:336:54
812.46:336:54
912.46:326:55
1012.46:316:55
1112.46:306:56
1212.56:296:56
1312.56:286:56
1412.56:276:57
1512.56:266:57
1612.56:256:58
1712.66:256:58
1812.66:246:59
1912.66:236:59
2012.66:227:00
2112.66:227:00
2212.76:217:00
2312.76:207:01
2412.76:197:01
2512.76:197:02
2612.76:187:03
2712.86:177:03
2812.86:177:04
2912.86:167:04
3012.86:167:05
3112.86:157:05

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.04 kWh/m².

For context, solar energy here swings from a low near 3.4 kWh/m² to a high of 5.71 kWh/m² in February across the year — October's 5.04 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.9Bright
84.9Bright
94.9Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
315.0Bright
Planning a trip in October

Hazard calendar for Rio Claro

In seasonPeak

None of Rio Claro's seasonal hazards are active in October. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Rio Claro's rainy season runs November–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is October a good time to visit Rio Claro?

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

5.5
Sightseeing
7th-best month of the year
5.3
Beach & pool
7th-best month of the year

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

What to pack for Rio Claro in October

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

In October, Rio Claro sees daytime highs around 26°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 16 days see rain.

rain gearlight clothessun protection

Sea temperature near Rio Claro in October

The nearest coast averages about 23°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 51 km away) is warmest in February at about 27°C and coldest in August near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Warm
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep22Refreshing
Oct23Refreshing
Nov23Refreshing
Dec25Warm

UV index in Rio Claro in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rio Claro peaks around February 9 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 9UV 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep7High
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Rio Claro in October

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Rio Claro is worst in September — around 33 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 15 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1332 µg/m³Dec 2115 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb16Moderate
Mar17Moderate
Apr19Moderate
May24Moderate
Jun29Moderate
Jul31Moderate
Aug27Moderate
Sep33Moderate
Oct20Moderate
Nov17Moderate
Dec15Moderate
Location & terrain

Where is Rio Claro?

Rio Claro sits at 22.7°S, 44.1°W, 464 m above sea level, in Brazil. The nearest listed city is Barra Mansa, 20 km away.

Topography around Rio Claro

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

Within 3 km, the terrain around Rio Claro has large variations in elevation — a maximum elevation change of 814 m around an average of 583 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,265 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,761 m.

The land around Rio Claro is covered by trees (50%) and grassland (48%) within 3 km, grassland (56%) and trees (43%) within 16 km, and trees (43%), grassland (29%) and water (24%) within 80 km.

3 km
814 m
16 km
1,265 m
80 km
2,761 m
treesgrasslandartificial surfaceswater
October weather nearby: Barra Mansa 20 km · Volta Redonda 22 km · Piraí 27 km · Pinheiral 27 km · Mangaratiba 28 km · Angra dos Reis 37 km · Porto Real 37 km · Itaguaí 40 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 Claro (-22.7231°, -44.1356°, elevation 464 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. 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).