Castro weather in October

In October, Castro sees average daytime highs of 23°C and overnight lows near 14°C, with 138 mm of rain across 15.1 wet days and about 12.6 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 19% 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 54 min by month's end. Set against the rest of the year, October is Castro's 9th-clearest and 1st-windiest month. For the whole year in context, see Castro's year-round climate.

Daytime high
23°
6th warmest
Overnight low
14°
6th coldest
Rainfall
138 mm
15.1 wet days
Daylight
12 h 36 min
6:47 AM – 7:23 PM
Cloud cover
71%
9th clearest
Wind
12 km/h
1st windiest
Solar energy
5.12 kWh/m²
Travel score
5.9
out of 10

Castro is human settlement in Brazil.

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 23°C through the month.

A typical October day in Castro reaches about 23°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 28°C. Set against its neighbours, October runs about 1°C warmer than September and about 1°C cooler than November.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12213
22313
32313
42313
52313
62313
72314
82314
92314
102314
112314
122314
132314
142414
152414
162414
172414
182414
192414
202414
212414
222414
232414
242414
252414
262414
272414
282414
292414
302414
312415

Castro weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 17°23523.813.44.5
Feb26° / 17°1782112.94.6
Mar25° / 17°1321812.25.5
Apr23° / 15°709.611.46.9
May20° / 12°898.910.86.5
Jun19° / 11°938.410.56.5
Jul19° / 10°79710.66.8
Aug21° / 11°727.311.17.2
Sep22° / 12°12710.411.86.6
Oct23° / 14°13815.112.65.9
Nov24° / 15°13316.113.25.8
Dec26° / 17°17320.313.55.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 13% of October, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23466
33466
43466
53466
63466
73466
83466
93466
103466
113466
123367
133367
143268
153268
163169
173070
183070
193070
203070
213070
223070
233169
243169
253169
263169
273169
283169
293169
303169
313268

Chance of precipitation in October

Any precipitation

Castro gets around 138 mm of rain over 15.1 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 49% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
144
244
345
445
545
646
746
846
947
1047
1147
1248
1348
1448
1549
1649
1749
1850
1950
2051
2151
2251
2351
2451
2551
2651
2751
2851
2951
3051
3151

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 37% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14035250
23935260
33735280
43634290
53534310
63334320
73234341
83134351
92934361
102834371
112834371
122734382
132634382
142534382
152435383
162335393
172235393
182235403
192135404
202135404
212135404
222135405
232135395
242135395
252234395
262234395
272233395
282233405
292233405
302232416
312232416

Wind in October

Winds average 12 km/h in October, the windiest month of the year.

Across October, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 12 min at the start of October to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over October. Sunrise moves from 7:02 AM to 6:36 AM, and sunset from 7:16 PM to 7:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.27:027:16
212.37:017:16
312.37:007:17
412.36:597:17
512.36:587:18
612.46:577:18
712.46:567:19
812.46:557:19
912.46:547:19
1012.46:537:20
1112.56:527:20
1212.56:517:21
1312.56:507:21
1412.56:497:22
1512.66:487:22
1612.66:477:23
1712.66:467:23
1812.66:467:24
1912.76:457:24
2012.76:447:25
2112.76:437:25
2212.76:427:26
2312.86:417:27
2412.86:417:27
2512.86:407:28
2612.86:397:28
2712.86:397:29
2812.96:387:30
2912.96:377:30
3012.96:367:31
3112.96:367:31

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.12 kWh/m².

For context, solar energy here swings from a low near 3.05 kWh/m² to a high of 5.87 kWh/m² in December across the year — October's 5.12 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.9Bright
74.9Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in October

Is October a good time to visit Castro?

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

5.9
Sightseeing
7th-best month of the year
4.8
Beach & pool
4th-best month of the year

October is a reasonable time to visit Castro for sightseeing.

What to pack for Castro in October

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

In October, Castro sees daytime highs around 23°C and nights near 14°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

UV index in Castro 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 Castro peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 19UV 15Jul 13UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug7High
Sep5High
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Castro 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 Castro is worst in September — around 17 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (March, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1316 µg/m³Mar 136 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr7Good
May8Good
Jun8Good
Jul10Good
Aug14Moderate
Sep17Moderate
Oct10Good
Nov7Good
Dec7Good
Location & terrain

Where is Castro?

Castro sits at 24.8°S, 50.0°W, 986 m above sea level, in Brazil. The nearest listed city is Piraí do Sul, 30 km away.

Topography around Castro

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

Within 3 km, the terrain around Castro has only modest variations in elevation — a maximum elevation change of 151 m around an average of 1,004 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 304 m; within 80 km, large variations in elevation — a maximum elevation change of 1,128 m.

The land around Castro is covered by trees (42%), artificial surfaces (28%) and grassland (20%) within 3 km, trees (42%) and cropland (42%) within 16 km, and trees (58%) and cropland (30%) within 80 km.

3 km
151 m
16 km
304 m
80 km
1,128 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Piraí do Sul 30 km · Ponta Grossa 37 km · Tibagi 51 km · Jaguariaíva 68 km · Palmeira 71 km · Arapoti 73 km · Cerro Azul 76 km · Imbituva 77 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 Castro (-24.7893°, -50.0123°, elevation 986 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).