Castro weather in August

In August, Castro sees average daytime highs of 21°C and overnight lows near 11°C, with 72 mm of rain across 7.3 wet days and about 11.1 hours of daylight. It is the 9th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 22°C by the end. The sky is clear or mostly clear about 50% of the time in August, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of August to 11 h 30 min by month's end. Set against the rest of the year, August is Castro's 1st-clearest and 5th-windiest month. For the whole year in context, see Castro's year-round climate.

Daytime high: 21°; 9th warmest
Overnight low: 11°; 3rd coldest
Rainfall: 72 mm; 7.3 wet days
Daylight: 11 h 06 min; 7:50 AM – 6:58 PM
Cloud cover: 44%; 1st clearest
Wind: 11 km/h; 5th windiest
Solar energy: 4.22 kWh/m²
Travel score: 7.2; out of 10

Castro is human settlement in Brazil.

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

← July Castro year-round climate September →Best places to visit in August

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 20°C in the first days to 22°C by the end.

A typical August day in Castro reaches about 21°C in the afternoon and slips back to 11°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 26°C. Set against its neighbours, August runs about 2°C warmer than July and about 1°C cooler than September.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	20	20	20	20	20	20	21	21	21	21	21	21	21	21	21	21	21	21	21	21	22	22	22	22	22	22	22	22	22	22	22
Avg low (°C)	10	10	10	10	10	10	10	10	10	10	10	10	10	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12

	Avg high (°C)	Avg low (°C)
1	20	10
2	20	10
3	20	10
4	20	10
5	20	10
6	20	10
7	21	10
8	21	10
9	21	10
10	21	10
11	21	10
12	21	10
13	21	10
14	21	11
15	21	11
16	21	11
17	21	11
18	21	11
19	21	11
20	21	11
21	22	11
22	22	11
23	22	11
24	22	11
25	22	11
26	22	11
27	22	11
28	22	11
29	22	11
30	22	12
31	22	12

Castro weather by month

How August compares with the rest of the year at a glance. August is the 9th-warmest and 11th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	26° / 17°	235	23.8	13.4	4.5
Feb	26° / 17°	178	21	12.9	4.6
Mar	25° / 17°	132	18	12.2	5.5
Apr	23° / 15°	70	9.6	11.4	6.9
May	20° / 12°	89	8.9	10.8	6.5
Jun	19° / 11°	93	8.4	10.5	6.5
Jul	19° / 10°	79	7	10.6	6.8
Aug	21° / 11°	72	7.3	11.1	7.2
Sep	22° / 12°	127	10.4	11.8	6.6
Oct	23° / 14°	138	15.1	12.6	5.9
Nov	24° / 15°	133	16.1	13.2	5.8
Dec	26° / 17°	173	20.3	13.5	5.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 38%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	62	63	63	62	62	62	62	62	62	62	60	60	60	60	60	60	60	60	61	61	62	62	62	63	64	64	64	64	63	63	62
Cloudier (%)	38	37	37	38	38	38	38	38	38	38	40	40	40	40	40	40	40	40	39	39	38	38	38	37	36	36	36	36	37	37	38

	Clearer (%)	Cloudier (%)
1	62	38
2	63	37
3	63	37
4	62	38
5	62	38
6	62	38
7	62	38
8	62	38
9	62	38
10	62	38
11	60	40
12	60	40
13	60	40
14	60	40
15	60	40
16	60	40
17	60	40
18	60	40
19	61	39
20	61	39
21	62	38
22	62	38
23	62	38
24	63	37
25	64	36
26	64	36
27	64	36
28	64	36
29	63	37
30	63	37
31	62	38

Chance of precipitation in August

Any precipitation

Castro gets around 72 mm of rain over 7.3 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 23% and peaks near 26% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	22	22	22	22	22	22	22	22	22	22	22	22	23	23	23	23	23	23	23	23	23	24	24	24	24	25	25	25	25	26	26

	Rain chance (%)
1	22
2	22
3	22
4	22
5	22
6	22
7	22
8	22
9	22
10	22
11	22
12	22
13	23
14	23
15	23
16	23
17	23
18	23
19	23
20	23
21	23
22	24
23	24
24	24
25	24
26	25
27	25
28	25
29	25
30	26
31	26

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 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	85	85	85	84	83	83	83	82	82	80	80	80	79	79	79	79	79	79	79	78	78	77	77	77	76	75	75	74	72	71	70
Comfortable (%)	15	15	15	15	16	16	16	17	17	18	18	18	19	19	19	19	19	19	19	20	20	21	21	21	22	23	23	24	25	26	27
Humid (%)	0	0	0	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	3	3	3

	Dry (%)	Comfortable (%)	Humid (%)
1	85	15	0
2	85	15	0
3	85	15	0
4	84	15	1
5	83	16	1
6	83	16	1
7	83	16	1
8	82	17	1
9	82	17	1
10	80	18	2
11	80	18	2
12	80	18	2
13	79	19	2
14	79	19	2
15	79	19	2
16	79	19	2
17	79	19	2
18	79	19	2
19	79	19	2
20	78	20	2
21	78	20	2
22	77	21	2
23	77	21	2
24	77	21	2
25	76	22	2
26	75	23	2
27	75	23	2
28	74	24	2
29	72	25	3
30	71	26	3
31	70	27	3

Wind in August

Winds average 11 km/h in August.

Across August, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	11	calm
2	11	calm
3	11	calm
4	11	calm
5	11	calm
6	11	calm
7	11	calm
8	11	calm
9	11	calm
10	11	calm
11	11	calm
12	11	calm
13	11	calm
14	11	calm
15	11	calm
16	11	calm
17	11	calm
18	11	calm
19	11	calm
20	11	calm
21	11	calm
22	11	calm
23	11	calm
24	11	calm
25	11	calm
26	11	calm
27	11	calm
28	11	calm
29	11	calm
30	11	calm
31	11	calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 10 h 48 min at the start of August to 11 h 30 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 8:01 AM to 7:36 AM, and sunset from 6:51 PM to 7:04 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	10.8	10.9	10.9	10.9	10.9	10.9	10.9	11.0	11.0	11.0	11.0	11.0	11.1	11.1	11.1	11.1	11.1	11.2	11.2	11.2	11.2	11.3	11.3	11.3	11.3	11.4	11.4	11.4	11.4	11.4	11.5
Sunrise (AM)	8:01	8:01	8:00	7:59	7:59	7:58	7:57	7:57	7:56	7:55	7:54	7:54	7:53	7:52	7:51	7:50	7:49	7:49	7:48	7:47	7:46	7:45	7:44	7:43	7:42	7:41	7:40	7:39	7:38	7:37	7:36
Sunset (PM)	6:51	6:52	6:52	6:53	6:53	6:53	6:54	6:54	6:55	6:55	6:56	6:56	6:57	6:57	6:58	6:58	6:58	6:59	6:59	7:00	7:00	7:01	7:01	7:01	7:02	7:02	7:03	7:03	7:03	7:04	7:04

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.8	8:01	6:51
2	10.9	8:01	6:52
3	10.9	8:00	6:52
4	10.9	7:59	6:53
5	10.9	7:59	6:53
6	10.9	7:58	6:53
7	10.9	7:57	6:54
8	11.0	7:57	6:54
9	11.0	7:56	6:55
10	11.0	7:55	6:55
11	11.0	7:54	6:56
12	11.0	7:54	6:56
13	11.1	7:53	6:57
14	11.1	7:52	6:57
15	11.1	7:51	6:58
16	11.1	7:50	6:58
17	11.1	7:49	6:58
18	11.2	7:49	6:59
19	11.2	7:48	6:59
20	11.2	7:47	7:00
21	11.2	7:46	7:00
22	11.3	7:45	7:01
23	11.3	7:44	7:01
24	11.3	7:43	7:01
25	11.3	7:42	7:02
26	11.4	7:41	7:02
27	11.4	7:40	7:03
28	11.4	7:39	7:03
29	11.4	7:38	7:03
30	11.4	7:37	7:04
31	11.5	7:36	7:04

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.22 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 — August's 4.22 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	3.8	3.8	3.8	3.8	3.9	3.9	3.9	3.9	4.0	4.0	4.0	4.0	4.1	4.1	4.2	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.4	4.5	4.5	4.5	4.5	4.6	4.6	4.6	4.6
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.8	Moderate
2	3.8	Moderate
3	3.8	Moderate
4	3.8	Moderate
5	3.9	Moderate
6	3.9	Moderate
7	3.9	Moderate
8	3.9	Moderate
9	4.0	Moderate
10	4.0	Bright
11	4.0	Bright
12	4.0	Bright
13	4.1	Bright
14	4.1	Bright
15	4.2	Bright
16	4.2	Bright
17	4.2	Bright
18	4.3	Bright
19	4.3	Bright
20	4.3	Bright
21	4.4	Bright
22	4.4	Bright
23	4.4	Bright
24	4.5	Bright
25	4.5	Bright
26	4.5	Bright
27	4.5	Bright
28	4.6	Bright
29	4.6	Bright
30	4.6	Bright
31	4.6	Bright

Planning a trip in August

Is August a good time to visit Castro?

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

7.2

Sightseeing

1st-best month of the year

4.5

Beach & pool

7th-best month of the year

August is one of the better times to visit Castro for general sightseeing.

What to pack for Castro in August

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

In August, Castro sees daytime highs around 21°C and nights near 11°C. Little to plan around — just the basics. About 7 days see rain.

UV index in Castro in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	15	15	12	9	7	6	5	7	5	11	14	14
Level	Extreme	Extreme	Extreme	Very high	High	High	High	High	High	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	15	Extreme
Mar	12	Extreme
Apr	9	Very high
May	7	High
Jun	6	High
Jul	5	High
Aug	7	High
Sep	5	High
Oct	11	Extreme
Nov	14	Extreme
Dec	14	Extreme

Air quality in Castro 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 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	7	7	6	7	8	8	10	14	17	10	7	7
Level	Good	Good	Good	Good	Good	Good	Good	Moderate	Moderate	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	7	Good
Feb	7	Good
Mar	6	Good
Apr	7	Good
May	8	Good
Jun	8	Good
Jul	10	Good
Aug	14	Moderate
Sep	17	Moderate
Oct	10	Good
Nov	7	Good
Dec	7	Good

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

trees 42%

16 km

304 m

trees 42%

80 km

1,128 m

trees 58%

treesgrasslandcroplandartificial surfaceswater

← July Castro year-round climate September →Best places to visit in August

August 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

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).

	Avg high (°C)	Avg low (°C)
1	20	10
2	20	10
3	20	10
4	20	10
5	20	10
6	20	10
7	21	10
8	21	10
9	21	10
10	21	10
11	21	10
12	21	10
13	21	10
14	21	11
15	21	11
16	21	11
17	21	11
18	21	11
19	21	11
20	21	11
21	22	11
22	22	11
23	22	11
24	22	11
25	22	11
26	22	11
27	22	11
28	22	11
29	22	11
30	22	12
31	22	12

	Clearer (%)	Cloudier (%)
1	62	38
2	63	37
3	63	37
4	62	38
5	62	38
6	62	38
7	62	38
8	62	38
9	62	38
10	62	38
11	60	40
12	60	40
13	60	40
14	60	40
15	60	40
16	60	40
17	60	40
18	60	40
19	61	39
20	61	39
21	62	38
22	62	38
23	62	38
24	63	37
25	64	36
26	64	36
27	64	36
28	64	36
29	63	37
30	63	37
31	62	38

	Rain chance (%)
1	22
2	22
3	22
4	22
5	22
6	22
7	22
8	22
9	22
10	22
11	22
12	22
13	23
14	23
15	23
16	23
17	23
18	23
19	23
20	23
21	23
22	24
23	24
24	24
25	24
26	25
27	25
28	25
29	25
30	26
31	26

	Dry (%)	Comfortable (%)	Humid (%)
1	85	15	0
2	85	15	0
3	85	15	0
4	84	15	1
5	83	16	1
6	83	16	1
7	83	16	1
8	82	17	1
9	82	17	1
10	80	18	2
11	80	18	2
12	80	18	2
13	79	19	2
14	79	19	2
15	79	19	2
16	79	19	2
17	79	19	2
18	79	19	2
19	79	19	2
20	78	20	2
21	78	20	2
22	77	21	2
23	77	21	2
24	77	21	2
25	76	22	2
26	75	23	2
27	75	23	2
28	74	24	2
29	72	25	3
30	71	26	3
31	70	27	3

	Avg high (°C)	Avg low (°C)
1	20	10
2	20	10
3	20	10
4	20	10
5	20	10
6	20	10
7	21	10
8	21	10
9	21	10
10	21	10
11	21	10
12	21	10
13	21	10
14	21	11
15	21	11
16	21	11
17	21	11
18	21	11
19	21	11
20	21	11
21	22	11
22	22	11
23	22	11
24	22	11
25	22	11
26	22	11
27	22	11
28	22	11
29	22	11
30	22	12
31	22	12

	Clearer (%)	Cloudier (%)
1	62	38
2	63	37
3	63	37
4	62	38
5	62	38
6	62	38
7	62	38
8	62	38
9	62	38
10	62	38
11	60	40
12	60	40
13	60	40
14	60	40
15	60	40
16	60	40
17	60	40
18	60	40
19	61	39
20	61	39
21	62	38
22	62	38
23	62	38
24	63	37
25	64	36
26	64	36
27	64	36
28	64	36
29	63	37
30	63	37
31	62	38

	Rain chance (%)
1	22
2	22
3	22
4	22
5	22
6	22
7	22
8	22
9	22
10	22
11	22
12	22
13	23
14	23
15	23
16	23
17	23
18	23
19	23
20	23
21	23
22	24
23	24
24	24
25	24
26	25
27	25
28	25
29	25
30	26
31	26

	Dry (%)	Comfortable (%)	Humid (%)
1	85	15	0
2	85	15	0
3	85	15	0
4	84	15	1
5	83	16	1
6	83	16	1
7	83	16	1
8	82	17	1
9	82	17	1
10	80	18	2
11	80	18	2
12	80	18	2
13	79	19	2
14	79	19	2
15	79	19	2
16	79	19	2
17	79	19	2
18	79	19	2
19	79	19	2
20	78	20	2
21	78	20	2
22	77	21	2
23	77	21	2
24	77	21	2
25	76	22	2
26	75	23	2
27	75	23	2
28	74	24	2
29	72	25	3
30	71	26	3
31	70	27	3

	Avg high (°C)	Avg low (°C)
1	20	10
2	20	10
3	20	10
4	20	10
5	20	10
6	20	10
7	21	10
8	21	10
9	21	10
10	21	10
11	21	10
12	21	10
13	21	10
14	21	11
15	21	11
16	21	11
17	21	11
18	21	11
19	21	11
20	21	11
21	22	11
22	22	11
23	22	11
24	22	11
25	22	11
26	22	11
27	22	11
28	22	11
29	22	11
30	22	12
31	22	12

	Clearer (%)	Cloudier (%)
1	62	38
2	63	37
3	63	37
4	62	38
5	62	38
6	62	38
7	62	38
8	62	38
9	62	38
10	62	38
11	60	40
12	60	40
13	60	40
14	60	40
15	60	40
16	60	40
17	60	40
18	60	40
19	61	39
20	61	39
21	62	38
22	62	38
23	62	38
24	63	37
25	64	36
26	64	36
27	64	36
28	64	36
29	63	37
30	63	37
31	62	38

	Rain chance (%)
1	22
2	22
3	22
4	22
5	22
6	22
7	22
8	22
9	22
10	22
11	22
12	22
13	23
14	23
15	23
16	23
17	23
18	23
19	23
20	23
21	23
22	24
23	24
24	24
25	24
26	25
27	25
28	25
29	25
30	26
31	26

	Dry (%)	Comfortable (%)	Humid (%)
1	85	15	0
2	85	15	0
3	85	15	0
4	84	15	1
5	83	16	1
6	83	16	1
7	83	16	1
8	82	17	1
9	82	17	1
10	80	18	2
11	80	18	2
12	80	18	2
13	79	19	2
14	79	19	2
15	79	19	2
16	79	19	2
17	79	19	2
18	79	19	2
19	79	19	2
20	78	20	2
21	78	20	2
22	77	21	2
23	77	21	2
24	77	21	2
25	76	22	2
26	75	23	2
27	75	23	2
28	74	24	2
29	72	25	3
30	71	26	3
31	70	27	3