Castro weather in August

In August, Castro sees average daytime highs of 11°C and overnight lows near 4°C, with 196 mm of precipitation across 19.9 wet days and about 10.3 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 11°C through the month. The sky is clear or mostly clear about 12% of the time in August, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of August to 10 h 54 min by month's end. Set against the rest of the year, August is Castro's 9th-clearest and 1st-windiest month. For the whole year in context, see Castro's year-round climate.

Daytime high: 11°; 10th warmest
Overnight low: 4°; 2nd coldest
Precipitation: 196 mm; 19.9 wet days
Daylight: 10 h 18 min; 8:51 AM – 7:07 PM
Cloud cover: 74%; 9th clearest
Wind: 11 km/h; 1st windiest
Solar energy: 2 kWh/m²
Travel score: 2.0; out of 10

Castro is Chilean city.

Density: 2,926/km²; people per km²
Founded: 1567

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

Day-to-day highs hold fairly steady near 11°C through the month.

A typical August day in Castro reaches about 11°C in the afternoon and slips back to 4°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 13°C. Set against its neighbours, August runs about 1°C warmer than July and about 2°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)	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	11	11	11	11	11	12
Avg low (°C)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4

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

Castro weather by month

How August compares with the rest of the year at a glance. August is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	20° / 10°	63	9.8	14.8	6.2
Feb	20° / 10°	56	8.3	13.7	6.4
Mar	18° / 9°	86	11.5	12.4	5.6
Apr	15° / 7°	112	13.6	10.9	4.0
May	12° / 6°	172	17.3	9.6	2.7
Jun	10° / 5°	192	19.3	8.9	1.8
Jul	10° / 4°	174	17.9	9.2	1.8
Aug	11° / 4°	196	19.9	10.3	2.0
Sep	12° / 5°	130	16.2	11.7	2.8
Oct	14° / 6°	124	16.3	13.2	3.5
Nov	16° / 7°	98	13.4	14.4	4.4
Dec	18° / 9°	82	12.6	15.1	5.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 73%.

	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 (%)	30	30	29	29	29	29	28	28	28	28	28	28	28	28	28	28	28	27	27	27	26	26	26	26	26	27	26	26	26	27	27
Cloudier (%)	70	70	71	71	71	71	72	72	72	72	72	72	72	72	72	72	72	73	73	73	74	74	74	74	74	73	74	74	74	73	73

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	29	71
4	29	71
5	29	71
6	29	71
7	28	72
8	28	72
9	28	72
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	28	72
16	28	72
17	28	72
18	27	73
19	27	73
20	27	73
21	26	74
22	26	74
23	26	74
24	26	74
25	26	74
26	27	73
27	26	74
28	26	74
29	26	74
30	27	73
31	27	73

Chance of precipitation in August

Any precipitation

Castro gets around 196 mm of rain and snow over 19.9 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 63% and peaks near 65% on the wettest days, and about 0 day brings snow.

	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 (%)	61	62	62	63	64	64	65	65	65	65	65	65	64	64	63	63	63	63	63	63	63	63	63	62	62	62	62	63	63	63	63

	Rain chance (%)
1	61
2	62
3	62
4	63
5	64
6	64
7	65
8	65
9	65
10	65
11	65
12	65
13	64
14	64
15	63
16	63
17	63
18	63
19	63
20	63
21	63
22	63
23	63
24	62
25	62
26	62
27	62
28	63
29	63
30	63
31	63

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 100% 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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in August

Winds average 11 km/h in August, the windiest month of the year.

Across August, daily wind ranges from about 11 km/h on the calmest days to 12 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	12	12	12	12	12	12	12	12	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	12	calm
7	12	calm
8	12	calm
9	12	calm
10	12	calm
11	12	calm
12	12	calm
13	12	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 9 h 42 min at the start of August to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over August. Sunrise moves from 9:11 AM to 8:27 AM, and sunset from 6:51 PM to 7:23 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)	9.7	9.7	9.7	9.8	9.8	9.8	9.9	9.9	10.0	10.0	10.0	10.1	10.1	10.2	10.2	10.3	10.3	10.3	10.4	10.4	10.5	10.5	10.6	10.6	10.7	10.7	10.8	10.8	10.8	10.9	10.9
Sunrise (AM)	9:11	9:10	9:09	9:08	9:07	9:05	9:04	9:03	9:01	9:00	8:59	8:57	8:56	8:54	8:53	8:51	8:50	8:48	8:47	8:45	8:44	8:42	8:40	8:39	8:37	8:35	8:34	8:32	8:30	8:29	8:27
Sunset (PM)	6:51	6:52	6:53	6:54	6:55	6:56	6:57	6:58	6:59	7:00	7:02	7:03	7:04	7:05	7:06	7:07	7:08	7:09	7:10	7:11	7:12	7:14	7:15	7:16	7:17	7:18	7:19	7:20	7:21	7:22	7:23

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.7	9:11	6:51
2	9.7	9:10	6:52
3	9.7	9:09	6:53
4	9.8	9:08	6:54
5	9.8	9:07	6:55
6	9.8	9:05	6:56
7	9.9	9:04	6:57
8	9.9	9:03	6:58
9	10.0	9:01	6:59
10	10.0	9:00	7:00
11	10.0	8:59	7:02
12	10.1	8:57	7:03
13	10.1	8:56	7:04
14	10.2	8:54	7:05
15	10.2	8:53	7:06
16	10.3	8:51	7:07
17	10.3	8:50	7:08
18	10.3	8:48	7:09
19	10.4	8:47	7:10
20	10.4	8:45	7:11
21	10.5	8:44	7:12
22	10.5	8:42	7:14
23	10.6	8:40	7:15
24	10.6	8:39	7:16
25	10.7	8:37	7:17
26	10.7	8:35	7:18
27	10.8	8:34	7:19
28	10.8	8:32	7:20
29	10.8	8:30	7:21
30	10.9	8:29	7:22
31	10.9	8:27	7:23

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 2 kWh/m².

For context, solar energy here swings from a low near 1.16 kWh/m² to a high of 6.04 kWh/m² in January across the year — August's 2 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)	1.7	1.7	1.7	1.7	1.7	1.8	1.8	1.8	1.8	1.9	1.9	1.9	1.9	1.9	2.0	2.0	2.0	2.0	2.1	2.1	2.1	2.2	2.2	2.2	2.3	2.3	2.4	2.4	2.4	2.5	2.5
Level	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	1.7	Dim
2	1.7	Dim
3	1.7	Dim
4	1.7	Dim
5	1.7	Dim
6	1.8	Dim
7	1.8	Dim
8	1.8	Dim
9	1.8	Dim
10	1.9	Dim
11	1.9	Dim
12	1.9	Dim
13	1.9	Dim
14	1.9	Dim
15	2.0	Dim
16	2.0	Dim
17	2.0	Moderate
18	2.0	Moderate
19	2.1	Moderate
20	2.1	Moderate
21	2.1	Moderate
22	2.2	Moderate
23	2.2	Moderate
24	2.2	Moderate
25	2.3	Moderate
26	2.3	Moderate
27	2.4	Moderate
28	2.4	Moderate
29	2.4	Moderate
30	2.5	Moderate
31	2.5	Moderate

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).

2.0

Sightseeing

10th-best month of the year

0.0

Beach & pool

8th-best month of the year

August is a weaker month for outdoor sightseeing in Castro.

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 11°C and nights near 4°C. Pack a warm layer and rain gear. About 20 days see rain.

a warm layerrain gear

Sea temperature near Castro in August

The nearest coast averages about 11°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 31 km away) is warmest in January at about 14°C and coldest in August near 11°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	14	14	14	13	12	12	11	11	11	11	12	13
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	14	Bracing
Feb	14	Bracing
Mar	14	Bracing
Apr	13	Bracing
May	12	Bracing
Jun	12	Bracing
Jul	11	Bracing
Aug	11	Bracing
Sep	11	Bracing
Oct	11	Bracing
Nov	12	Bracing
Dec	13	Bracing

UV index in Castro in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Castro peaks around December 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	11	11	7	4	2	1	2	2	4	7	8	12
Level	Extreme	Extreme	High	Moderate	Moderate	Low	Low	Moderate	Moderate	High	Very high	Extreme

	UV index (midday)	Level
Jan	11	Extreme
Feb	11	Extreme
Mar	7	High
Apr	4	Moderate
May	2	Moderate
Jun	1	Low
Jul	2	Low
Aug	2	Moderate
Sep	4	Moderate
Oct	7	High
Nov	8	Very high
Dec	12	Extreme

Location & terrain

Where is Castro?

Castro sits at 42.5°S, 73.8°W, 81 m above sea level, in Chile. The nearest listed city is Ancud, 67 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 significant variations in elevation — a maximum elevation change of 306 m around an average of 69 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 835 m; within 80 km, large variations in elevation — a maximum elevation change of 847 m.

The land around Castro is covered by trees (39%), water (27%) and grassland (20%) within 3 km, trees (54%) and grassland (25%) within 16 km, and water (58%) and trees (34%) within 80 km.

3 km

306 m

trees 39%

16 km

835 m

trees 54%

80 km

847 m

water 58%

treesgrasslandartificial surfaceswater

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

August weather nearby: Ancud 67 km · Quellón 73 km · Calbuco 94 km · Maullín 96 km · Puerto Montt 131 km · Puerto Varas 144 km · Llanquihue 149 km · Frutillar 161 km

Chile travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F / L; 220 V · 50 Hz
Prices: ≈ 48% of US; price level, 2025
GDP per capita: $17,995; 2025
Happiness: 6.3 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 6.3; per 100k, 2023
Road deaths: 14.9; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 517
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 (-42.4721°, -73.7732°, elevation 81 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).

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

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	29	71
4	29	71
5	29	71
6	29	71
7	28	72
8	28	72
9	28	72
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	28	72
16	28	72
17	28	72
18	27	73
19	27	73
20	27	73
21	26	74
22	26	74
23	26	74
24	26	74
25	26	74
26	27	73
27	26	74
28	26	74
29	26	74
30	27	73
31	27	73

	Rain chance (%)
1	61
2	62
3	62
4	63
5	64
6	64
7	65
8	65
9	65
10	65
11	65
12	65
13	64
14	64
15	63
16	63
17	63
18	63
19	63
20	63
21	63
22	63
23	63
24	62
25	62
26	62
27	62
28	63
29	63
30	63
31	63

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	29	71
4	29	71
5	29	71
6	29	71
7	28	72
8	28	72
9	28	72
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	28	72
16	28	72
17	28	72
18	27	73
19	27	73
20	27	73
21	26	74
22	26	74
23	26	74
24	26	74
25	26	74
26	27	73
27	26	74
28	26	74
29	26	74
30	27	73
31	27	73

	Rain chance (%)
1	61
2	62
3	62
4	63
5	64
6	64
7	65
8	65
9	65
10	65
11	65
12	65
13	64
14	64
15	63
16	63
17	63
18	63
19	63
20	63
21	63
22	63
23	63
24	62
25	62
26	62
27	62
28	63
29	63
30	63
31	63

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	29	71
4	29	71
5	29	71
6	29	71
7	28	72
8	28	72
9	28	72
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	28	72
16	28	72
17	28	72
18	27	73
19	27	73
20	27	73
21	26	74
22	26	74
23	26	74
24	26	74
25	26	74
26	27	73
27	26	74
28	26	74
29	26	74
30	27	73
31	27	73

	Rain chance (%)
1	61
2	62
3	62
4	63
5	64
6	64
7	65
8	65
9	65
10	65
11	65
12	65
13	64
14	64
15	63
16	63
17	63
18	63
19	63
20	63
21	63
22	63
23	63
24	62
25	62
26	62
27	62
28	63
29	63
30	63
31	63

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100