Climate and average weather in Castro
In Castro, the summers are mild, showery, and partly cloudy and the winters are cool and mostly cloudy.
Over the course of the year, the temperature in Castro typically varies from 4°C to 20°C, and is rarely below -1°C or above 26°C. February is the hottest month of the year, while July is the coldest.
Based on the travel score, the best times of year to visit Castro for warm-weather activities are from early January to late March and early December to late December.
- Hottest
- Feb
- 20°
- Coldest
- Jul
- 4°
- Wettest
- Aug
- 196 mm
- Driest
- Feb
- 56 mm
- Rain / yr
- 1486 mm
- 176 wet days
- Daylight
- 8.9–15.1 h
- shortest–longest
- Elevation
- 81 m
- 42.5°S
- Clearest
- Feb
- 57% cloud
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.
Castro weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early January to late March.
Temperature through the year
Daily average highs and lows in Castro, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 3.4 months, from December 8 to March 21, with daily high temperatures above 18°C. The hottest month of the year in Castro is February, with an average high of 20°C and low of 10°C.
The cool season lasts 3.5 months, from May 23 to September 5, with daily high temperatures below 12°C. The coldest month of the year in Castro is July, with an average low of 4°C and high of 10°C.
Days typically run about 8°C warmer than nights, with the widest day–night swing (around 10°C) in February.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 20 | 18 | 15 | 12 | 10 | 10 | 11 | 12 | 14 | 16 | 18 |
| Avg low (°C) | 10 | 10 | 9 | 7 | 6 | 5 | 4 | 4 | 5 | 6 | 7 | 9 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 20 | 10 |
| Feb | 20 | 10 |
| Mar | 18 | 9 |
| Apr | 15 | 7 |
| May | 12 | 6 |
| Jun | 10 | 5 |
| Jul | 10 | 4 |
| Aug | 11 | 4 |
| Sep | 12 | 5 |
| Oct | 14 | 6 |
| Nov | 16 | 7 |
| Dec | 18 | 9 |
Average hourly temperature in Castro
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on February afternoons, near 20°C, and coldest before dawn in July, near 4°C.
Castro weather by month
Every month at a glance. Click a month for its detailed page.
| 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 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Castro gets about 1486 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.
The wetter season lasts 6.5 months, from around Apr 23 to Nov 5, peaking in June at about 64% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Feb 13.
August is the wettest month by volume, with 196 mm over about 20 wet days; February is the driest, with 56 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 32 | 30 | 37 | 45 | 56 | 63 | 59 | 63 | 55 | 52 | 45 | 40 |
| Rain days | 10 | 8 | 12 | 14 | 17 | 19 | 18 | 20 | 16 | 16 | 13 | 13 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 32 | 10 |
| Feb | 30 | 8 |
| Mar | 37 | 12 |
| Apr | 45 | 14 |
| May | 56 | 17 |
| Jun | 63 | 19 |
| Jul | 59 | 18 |
| Aug | 63 | 20 |
| Sep | 55 | 16 |
| Oct | 52 | 16 |
| Nov | 45 | 13 |
| Dec | 40 | 13 |
Monthly rainfall
Over a full year, Castro collects about 1486 mm of rain across 176 wet days — roughly 124 mm in an average month.
It doesn’t fall evenly. August is the wettest month with 196 mm, while February is the driest at just 56 mm. The three wettest months alone bring about 38% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 63 | 56 | 86 | 112 | 172 | 192 | 174 | 196 | 130 | 124 | 98 | 82 |
| Rain days | 10 | 8 | 12 | 14 | 17 | 19 | 18 | 20 | 16 | 16 | 13 | 13 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 63 | 10 |
| Feb | 56 | 8 |
| Mar | 86 | 12 |
| Apr | 112 | 14 |
| May | 172 | 17 |
| Jun | 192 | 19 |
| Jul | 174 | 18 |
| Aug | 196 | 20 |
| Sep | 130 | 16 |
| Oct | 124 | 16 |
| Nov | 98 | 13 |
| Dec | 82 | 13 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Castro, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around January 2 and lasts for 3.8 months, ending around April 28. The clearest month is February, when the sky is clear, mostly clear, or partly cloudy 45% of the time on average.
The cloudier part of the year begins around April 29 and lasts for 8.1 months, ending around January 1. The cloudiest month is November, when it is overcast or mostly cloudy 75% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 39 | 45 | 38 | 34 | 27 | 27 | 28 | 28 | 25 | 25 | 25 | 28 |
| Cloudier (%) | 61 | 55 | 62 | 66 | 73 | 73 | 72 | 72 | 75 | 75 | 75 | 72 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 39 | 61 |
| Feb | 45 | 55 |
| Mar | 38 | 62 |
| Apr | 34 | 66 |
| May | 27 | 73 |
| Jun | 27 | 73 |
| Jul | 28 | 72 |
| Aug | 28 | 72 |
| Sep | 25 | 75 |
| Oct | 25 | 75 |
| Nov | 25 | 75 |
| Dec | 28 | 72 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 15 h 06 min of light; the shortest, around June 12, only 8 h 54 min — a swing of roughly 6 h 12 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.8 | 13.7 | 12.4 | 10.9 | 9.6 | 8.9 | 9.2 | 10.3 | 11.7 | 13.2 | 14.4 | 15.1 |
| Sunrise (AM) | 6:41 | 7:18 | 7:54 | 8:30 | 9:04 | 9:28 | 9:25 | 8:51 | 7:58 | 7:05 | 6:27 | 6:18 |
| Sunset (PM) | 9:28 | 9:01 | 8:15 | 7:21 | 6:39 | 6:22 | 6:36 | 7:07 | 7:41 | 8:15 | 8:54 | 9:24 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 14.8 | 6:41 | 9:28 |
| Feb | 13.7 | 7:18 | 9:01 |
| Mar | 12.4 | 7:54 | 8:15 |
| Apr | 10.9 | 8:30 | 7:21 |
| May | 9.6 | 9:04 | 6:39 |
| Jun | 8.9 | 9:28 | 6:22 |
| Jul | 9.2 | 9:25 | 6:36 |
| Aug | 10.3 | 8:51 | 7:07 |
| Sep | 11.7 | 7:58 | 7:41 |
| Oct | 13.2 | 7:05 | 8:15 |
| Nov | 14.4 | 6:27 | 8:54 |
| Dec | 15.1 | 6:18 | 9:24 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Castro averages about 5 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 3 and 9 days.
The sunnier stretch runs 3.5 months, from around Dec 29 to Apr 15. The sunniest month is February, with roughly 9 sunny days (mixed).
The greyest month is June, down near 3 sunny days — about 61% fewer than the February peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 8 | 8 | 7 | 5 | 4 | 3 | 4 | 4 | 4 | 4 | 4 | 5 |
| Sky | Gloomy | Mixed | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 8 | Gloomy |
| Feb | 8 | Mixed |
| Mar | 7 | Gloomy |
| Apr | 5 | Gloomy |
| May | 4 | Gloomy |
| Jun | 3 | Gloomy |
| Jul | 4 | Gloomy |
| Aug | 4 | Gloomy |
| Sep | 4 | Gloomy |
| Oct | 4 | Gloomy |
| Nov | 4 | Gloomy |
| Dec | 5 | Gloomy |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Castro, the air stays dry or comfortable essentially all year. Even in February, the muggiest month, it feels humid or worse only about 1% of the time — humidity is not something you need to plan around here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 90 | 89 | 92 | 97 | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 96 |
| Comfortable (%) | 10 | 10 | 8 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 4 |
| Humid (%) | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 90 | 10 | 0 |
| Feb | 89 | 10 | 1 |
| Mar | 92 | 8 | 0 |
| Apr | 97 | 3 | 0 |
| May | 99 | 1 | 0 |
| Jun | 100 | 0 | 0 |
| Jul | 100 | 0 | 0 |
| Aug | 100 | 0 | 0 |
| Sep | 100 | 0 | 0 |
| Oct | 100 | 0 | 0 |
| Nov | 100 | 1 | 0 |
| Dec | 96 | 4 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Wind in Castro is steady company: average speeds sit near 10 km/h — calm — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 10 | 10 | 9 | 9 | 10 | 11 | 11 | 11 | 10 | 10 | 10 | 10 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 10 | calm |
| Feb | 10 | calm |
| Mar | 9 | calm |
| Apr | 9 | calm |
| May | 10 | calm |
| Jun | 11 | calm |
| Jul | 11 | calm |
| Aug | 11 | calm |
| Sep | 10 | calm |
| Oct | 10 | calm |
| Nov | 10 | calm |
| Dec | 10 | calm |
Best time to visit Castro
To characterize how pleasant the weather is in Castro throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid March, Castro is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Castro for general outdoor tourist activities is from early December to late March, with a peak score in the second week of February.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 6.2 | 6.4 | 5.6 | 4.0 | 2.7 | 1.8 | 1.7 | 2.0 | 2.8 | 3.5 | 4.4 | 5.3 |
| Rating | good | good | good | fair | poor | poor | poor | poor | poor | fair | fair | fair |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 6.2 | good |
| Feb | 6.4 | good |
| Mar | 5.6 | good |
| Apr | 4.0 | fair |
| May | 2.7 | poor |
| Jun | 1.8 | poor |
| Jul | 1.7 | poor |
| Aug | 2.0 | poor |
| Sep | 2.8 | poor |
| Oct | 3.5 | fair |
| Nov | 4.4 | fair |
| Dec | 5.3 | fair |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Castro for hot-weather activities is from mid January to late February, with a peak score in the second week of February.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Castro, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around February (highs near 20°C), the essentials are rain gear and sun protection. In the cold season around July (highs near 10°C), pack a warm layer and rain gear.
In February, Castro sees daytime highs around 20°C and nights near 10°C. Worth packing: rain gear and sun protection. About 8 days see rain.
Sea temperature near Castro
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
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 (midday) in Castro by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
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 |
Average hourly UV index in Castro
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in December the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 6.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 9 | 8.5 | 6.5 | 4 | 0 | 0 | 0 | 0 | 4 | 6.5 | 8 | 9 |
| UV ≥ 6 (h/day) | 6.5 | 6 | 2.5 | 0 | 0 | 0 | 0 | 0 | 0 | 2.5 | 4.5 | 6.5 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 9 | 6.5 |
| Feb | 8.5 | 6 |
| Mar | 6.5 | 2.5 |
| Apr | 4 | 0 |
| May | 0 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 4 | 0 |
| Oct | 6.5 | 2.5 |
| Nov | 8 | 4.5 |
| Dec | 9 | 6.5 |
Growing season
Castro is mild enough that a frost-free day stays more likely than not even in midwinter. Nights are reliably above freezing from about August 7 to June 9 (307 days); outside that window a hard frost is an occasional risk.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 99 | 95 | 89 | 87 | 91 | 95 | 99 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 3 | 30 | 31 | 18 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 99 | 0 |
| May | 95 | 3 |
| Jun | 89 | 30 |
| Jul | 87 | 31 |
| Aug | 91 | 18 |
| Sep | 95 | 0 |
| Oct | 99 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Castro banks about 573 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around February.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 147 | 138 | 104 | 28 | 0 | 0 | 0 | 0 | 0 | 5 | 48 | 104 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 147 |
| Feb | 138 |
| Mar | 104 |
| Apr | 28 |
| May | 0 |
| Jun | 0 |
| Jul | 0 |
| Aug | 0 |
| Sep | 0 |
| Oct | 5 |
| Nov | 48 |
| Dec | 104 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Castro receives about 3.5 kWh/m² a day of solar energy on average — moderate — with a clear seasonal swing between 1.2 and 6.1 kWh/m².
The brighter stretch of the year lasts 5.9 months, from around Sep 26 to Mar 24. The brightest month is January, averaging about 6.0 kWh/m² (intense).
The dimmest month is June, down near 1.2 kWh/m² — roughly 80% less than the January peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.0 | 5.3 | 3.9 | 2.5 | 1.5 | 1.2 | 1.4 | 2.0 | 3.1 | 4.4 | 5.2 | 5.9 |
| Level | Intense | Bright | Moderate | Moderate | Dim | Dim | Dim | Moderate | Moderate | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 6.0 | Intense |
| Feb | 5.3 | Bright |
| Mar | 3.9 | Moderate |
| Apr | 2.5 | Moderate |
| May | 1.5 | Dim |
| Jun | 1.2 | Dim |
| Jul | 1.4 | Dim |
| Aug | 2.0 | Moderate |
| Sep | 3.1 | Moderate |
| Oct | 4.4 | Bright |
| Nov | 5.2 | Bright |
| Dec | 5.9 | Bright |
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. 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).