Castro, Chile experiences average highs of 15°C (59°F) and lows of 8°C (46°F) throughout the year. Rainfall is frequent, averaging about 14 rainy days per month. Average highs have cooled by 0.8°C (1.4°F) across the available records.
Castro, Chile Weather & Climate 2026
Monthly climate averages for Castro, Chile. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.4/10
Best: January, February, March, December
UV Index
5
Low
Temperature 15°C / 8°C
Feels Like 13°C / 6°C
Rainy Days 14
Rainfall 118 mm
Sunshine 8 h
Humidity 83%
Wind Speed 15 km/h
Dew Point 8°C
Frost Days 1 days
Hottest Month
20°C
February
Avg Low11°C
Rain7days
Coldest Month
5°C
July
Avg High10°C
Rain18days
Driest Month
7days
February
Avg High20°C
Avg Low11°C
Windiest Month
17 km/h
August (Gusts 42)
Sea Temperature
9°C – 16°C
Warmest water: January (
15.5°C
)
Worst Time to Visit
Consider avoiding June, July, August, September due to heavy rainfall.
Sun Position
Sunrise 08:25
Daylight 9.1h
Sunset 17:29
Live conditions—
Castro on the map · live conditions
Castro, Chile
- Continent
- Americas
- Country
- Chile
- City
- Castro
- Population
- 41.7K
- Coordinates
- -42.47°, -73.77°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 14°C
Avg Low 7°C
Rain 15 days/mo
Summer
Dec–Feb
Avg High 19°C
Avg Low 11°C
Rain 9 days/mo
3/3 best months
Autumn
Mar–May
Avg High 15°C
Avg Low 8°C
Rain 13 days/mo
1/3 best months
Winter
Jun–Aug
Avg High 10°C
Avg Low 5°C
Rain 19 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 20°C / 11°C . Feb: 20°C / 11°C . Mar: 18°C / 10°C . Apr: 15°C / 8°C . May: 12°C / 7°C . Jun: 10°C / 5°C . Jul: 10°C / 5°C . Aug: 11°C / 5°C . Sep: 12°C / 5°C . Oct: 14°C / 6°C . Nov: 16°C / 9°C . Dec: 18°C / 10°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 50 mm. Feb: 41 mm. Mar: 90 mm. Apr: 132 mm. May: 148 mm. Jun: 184 mm. Jul: 163 mm. Aug: 187 mm. Sep: 141 mm. Oct: 106 mm. Nov: 96 mm. Dec: 72 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 75%. Feb: 74%. Mar: 80%. Apr: 86%. May: 89%. Jun: 90%. Jul: 89%. Aug: 88%. Sep: 84%. Oct: 81%. Nov: 79%. Dec: 76%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 14 km/h . Feb: 14 km/h . Mar: 15 km/h . Apr: 15 km/h . May: 15 km/h . Jun: 16 km/h . Jul: 16 km/h . Aug: 17 km/h . Sep: 16 km/h . Oct: 15 km/h . Nov: 15 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 12h. Feb: 10h. Mar: 9h. Apr: 7h. May: 6h. Jun: 5h. Jul: 5h. Aug: 6h. Sep: 8h. Oct: 9h. Nov: 10h. Dec: 11h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 16°C . Feb: 15°C . Mar: 13°C . Apr: 12°C . May: 11°C . Jun: 10°C . Jul: 9°C . Aug: 10°C . Sep: 10°C . Oct: 11°C . Nov: 13°C . Dec: 14°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 8. Feb: UV 7. Mar: UV 5. Apr: UV 4. May: UV 2. Jun: UV 2. Jul: UV 2. Aug: UV 3. Sep: UV 4. Oct: UV 6. Nov: UV 7. Dec: UV 7.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have cooled by 0.8°C (1.4°F) across the available records. Average rainfall is trending wetter by about 41 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jan 2025 · 20°C | Feb · 20°C |
| Coldest month | Jun 2025 · 5°C | Jul · 5°C |
| Wettest month | May 2025 · 237 mm | Aug · 187 mm |
| Windiest month | May 2025 · 18 km/h | Aug · 17 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March best
Good April
Fair May
Poor June
Wet July
Wet August
Wet September
Poor October
Fair November
Good December best
Good | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 20°C / 11°C | 20°C / 10°C | 9days (50 mm) Wet | 11.5h Excellent | 75% Muggy | 7.8 Very High | Excellent | View Details |
| February best | 20°C / 11°C | 20°C / 10°C | 7days (41 mm) Good | 10.4h Excellent | 74% Muggy | 6.6 High | Excellent | View Details |
| March best | 18°C / 10°C | 17°C / 8°C | 10days (90 mm) Wet | 8.6h Good | 80% Humid | 5 Moderate | Good | View Details |
| April | 15°C / 8°C | 13°C / 6°C | 14days (132 mm) Wet | 6.6h Fair | 86% Very Muggy | 3.5 Moderate | Fair | View Details |
| May | 12°C / 7°C | 11°C / 5°C | 16days (148 mm) Wet | 5.5h Fair | 89% Very Muggy | 2 Low | Poor | View Details |
| June | 10°C / 5°C | 8°C / 2°C | 18days (184 mm) Wet | 4.6h Fair | 90% Very Muggy | 1.5 Low | Wet | View Details |
| July | 10°C / 5°C | 7°C / 2°C | 18days (163 mm) Wet | 4.8h Fair | 89% Very Muggy | 1.7 Low | Wet | View Details |
| August | 11°C / 5°C | 8°C / 2°C | 20days (187 mm) Wet | 5.9h Fair | 88% Very Muggy | 2.6 Moderate | Wet | View Details |
| September | 12°C / 5°C | 10°C / 3°C | 16days (141 mm) Wet | 7.8h Good | 84% Humid | 3.8 Moderate | Poor | View Details |
| October | 14°C / 6°C | 12°C / 4°C | 16days (106 mm) Wet | 9.1h Good | 81% Humid | 5.8 High | Fair | View Details |
| November | 16°C / 9°C | 15°C / 6°C | 13days (96 mm) Wet | 9.8h Good | 79% Humid | 6.6 High | Good | View Details |
| December best | 18°C / 10°C | 18°C / 8°C | 10days (72 mm) Wet | 10.9h Excellent | 76% Humid | 7.3 Very High | Good | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Castro are January, February, March, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Castro, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Castro is February, with average daytime highs of 20°C (69°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Castro is July, with average overnight lows of 5°C (40°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Castro is August, averaging 187mm of precipitation across 20 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Castro runs through August, June, July, May, with the heaviest rainfall in August. Based on 10-year averages for Castro.
Castro receives approximately 96 sunshine hours per year. The sunniest month is January with around 12 hours. Based on climate data for Castro.
The least favorable months to visit Castro are June, July, August, September, primarily due to heavy rainfall. For the best conditions, consider January, February, March, December instead.
The annual average UV index in Castro is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Castro is 83%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Sea temperatures in Summer average 12°C (54°F), which most swimmers will find too cold without a wetsuit.
Castro rarely sees significant snowfall but does experience frost, averaging 1 frost days during the colder months.
Average wind speeds in Castro are 15 km/h (9 mph). The windiest month is August with peak winds reaching 17 km/h (10 mph) (gusts up to 42 km/h / 26 mph).
Castro averages 3 clear-sky days per month with overall cloud cover around 67%. The clearest skies occur in February.
The annual average dew point in Castro is 8°C (46°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Castro has a Oceanic climate, classified as Cfb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Castro ranges from 6°C (43°F) to 13°C (55°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
June is not the best time to visit Castro, with a climate score of 2.7/10. Consider visiting during January, February, March, December instead for better conditions.
For June in Castro, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. With average highs of 10°C (50°F) and 18 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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