Castro in Fall
In fall (March, April and May), Castro sees average daytime highs around 15°C and overnight lows near 7°C, with 370 mm of rain over about 42 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 19°C in early March to 11°C by late May. The sky is clear or mostly clear about 18% of the time across fall, and the air most often feels dry.
Fall is Castro's 2nd-best season to visit on our travel score. For the whole year in context, see Castro's year-round climate.
- Avg daytime high
- 15°C
- 2nd-warmest season
- Avg overnight low
- 7°C
- Rainfall
- 370 mm
- 42 wet days
- Avg wind
- 10 km/h
- Travel score
- 4.1
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Castro in Fall
Over the season highs ease from about 19°C in early March to 11°C by late May.
A typical fall day in Castro reaches about 15°C and drops to 7°C overnight. The warmest of the three months is March, the coolest May.
Castro weather by month
How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| 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 Fall
The sky is clear or mostly clear about 18% of the time across fall.
Chance of precipitation in Fall
Castro gets around 370 mm of rain over 42 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 10 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 h 06 min in early March to 9 h 12 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 2.7 kWh/m².
Is fall a good time to visit Castro?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Castro for sightseeing.
What to pack for Castro in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Castro sees daytime highs around 15°C and nights near 7°C. Pack rain gear. Worth having: a warm layer. About 42 days see rain.
Sea temperature near Castro in Fall
The nearest coast averages about 13°C across fall — 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 Fall
Clear-sky midday UV across fall averages around 4 — 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 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 |
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.
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.