Climate and average weather in Constitución

In Constitución, the weather is mild, showery, and clear and remarkably steady, with daytime highs holding near mild levels all year. The wettest stretch peaks around June.

Best: early January to early April

Over the course of the year, the temperature in Constitución typically varies from 10°C to 18°C, and is rarely below 7°C or above 20°C. January is the hottest month of the year, while July is the coldest.

Based on the travel score, the best times of year to visit Constitución for warm-weather activities are from early January to early April and late November to late December.

Hottest
Jan
18°
Coldest
Jul
10°
Wettest
Jun
169 mm
Driest
Jan
2 mm
Rain / yr
650 mm
54 wet days
Daylight
9.6–14.4 h
shortest–longest
Elevation
19 m
35.3°S
Clearest
Jan
19% cloud

Constitución 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 early April.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Constitución, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

Temperatures in Constitución stay fairly even through the year, without a distinct hot or cool season. The warmest month is January, with an average high of 18°C and low of 15°C; the coolest is July, with an average low of 10°C and high of 12°C.

Days typically run about 3°C warmer than nights year-round.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan1815
Feb1815
Mar1814
Apr1613
May1411
Jun1311
Jul1210
Aug1310
Sep1310
Oct1411
Nov1612
Dec1714

Average hourly temperature in Constitución

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 January afternoons, near 18°C, and coldest before dawn in July, near 10°C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Constitución weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 15°20.514.18.0
Feb18° / 15°50.713.38.0
Mar18° / 14°91.212.37.5
Apr16° / 13°313.611.15.9
May14° / 11°1227.710.24.4
Jun13° / 11°169119.73.6
Jul12° / 10°1218.99.93.5
Aug13° / 10°988.410.73.6
Sep13° / 10°495.111.84.2
Oct14° / 11°284.312.95.0
Nov16° / 12°111.413.96.2
Dec17° / 14°6114.37.2

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Constitución gets about 650 mm of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.

The wetter season lasts 5.5 months, from around Apr 27 to Oct 9, peaking in June at about 38% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jan 1.

June is the wettest month by volume, with 169 mm over about 11 wet days; January is the driest, with 2 mm.

0%10%20%30%40%50%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetJun 17 · 38%Jan 1 · 2%
Rain on a day (%)Rain days
Jan21
Feb31
Mar41
Apr124
May258
Jun3611
Jul299
Aug268
Sep185
Oct134
Nov51
Dec31

Monthly rainfall

Over a full year, Constitución collects about 650 mm of rain across 54 wet days — roughly 54 mm in an average month.

It doesn’t fall evenly. June is the wettest month with 169 mm, while January is the driest at just 2 mm. The three wettest months alone bring about 63% of the year’s total.

0255075100125150175200JanFebMarAprMayJunJulAugSepOctNovDec25931122169121984928116
Rainfall (mm)Rain days
Jan21
Feb51
Mar91
Apr314
May1228
Jun16911
Jul1219
Aug988
Sep495
Oct284
Nov111
Dec61

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Constitución, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around October 15 and lasts for 5.9 months, ending around April 12. The clearest month is February, when the sky is clear, mostly clear, or partly cloudy 90% of the time on average.

The cloudier part of the year begins around April 13 and lasts for 6.1 months, ending around October 14. The cloudiest month is June, when it is overcast or mostly cloudy 59% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecFeb 9 · 91%Jun 19 · 39%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan9010
Feb9010
Mar8218
Apr6634
May4753
Jun4159
Jul4951
Aug5050
Sep5842
Oct6733
Nov8020
Dec8713

Daylight, sunrise and sunset

DaylightNight

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 December 13, brings about 14 h 24 min of light; the shortest, around June 14, only 9 h 36 min — a swing of roughly 4 h 48 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan14.16:559:03
Feb13.37:248:44
Mar12.37:518:08
Apr11.18:177:23
May10.28:426:50
Jun9.79:016:39
Jul9.99:006:50
Aug10.78:347:13
Sep11.87:517:37
Oct12.97:078:02
Nov13.96:388:32
Dec14.36:358:57

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Constitución averages about 17 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 24 days.

The sunnier stretch runs 5.7 months, from around Oct 16 to Apr 8. The sunniest month is January, with roughly 24 sunny days (brilliant).

The greyest month is June, down near 9 sunny days — about 63% fewer than the January peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightbrilliantJan 2824 daysJun 209 days
Sunny daysSky
Jan25Brilliant
Feb22Brilliant
Mar22Bright
Apr16Bright
May10Mixed
Jun9Mixed
Jul11Mixed
Aug12Mixed
Sep14Mixed
Oct17Bright
Nov20Bright
Dec23Bright

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

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 Constitución, the air stays dry or comfortable essentially all year. Even in February, the muggiest month, it feels humid or worse only about 3% of the time — humidity is not something you need to plan around here.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDeccomfortabledry
Dry (%)Comfortable (%)Humid (%)
Jan45542
Feb40573
Mar53471
Apr81190
May9190
Jun9820
Jul10000
Aug10000
Sep10000
Oct9910
Nov9550
Dec74260

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.

Across the year, average wind speed in Constitución is typically light breeze, near 17 km/h, and varies moderately with the seasons.

The windier part of the year lasts 5.3 months, from around Oct 1 to Mar 9. The windiest month is November, averaging about 20 km/h (light breeze).

The calmer part of the year runs from around Mar 10 to Sep 30, with May the calmest month at about 15 km/h.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecwindiercalmerwindiercalmlight breezebreezyNov 26 · 20 km/hMay 15 · 15 km/h
Wind speed (km/h)Feels
Jan19light breeze
Feb18light breeze
Mar17light breeze
Apr16light breeze
May15light breeze
Jun16light breeze
Jul16light breeze
Aug16light breeze
Sep17light breeze
Oct18light breeze
Nov20light breeze
Dec20breezy

Hazard calendar for Constitución

In seasonPeak

When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.

Constitución's rainy season runs May–August, when most of the year's rain falls.

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

Best time to visit Constitución

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Constitución throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around late March, Constitución 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 Constitución for general outdoor tourist activities is from late November to early April, with a peak score in the last week of January.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationJan 28 · 8.1

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).

Travel score (0–10)Rating
Jan8.0ideal
Feb8.0ideal
Mar7.5good
Apr5.9good
May4.4fair
Jun3.6fair
Jul3.5poor
Aug3.6fair
Sep4.2fair
Oct5.0fair
Nov6.2good
Dec7.2good

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 Constitución for hot-weather activities is from late December to mid March, with a peak score in the last week of January.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJan 29 · 2.9

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 Constitución, by month

EssentialRecommendedOptional

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.

Constitución packs about the same all year — highs hold near 18°C. Across the year the things worth having are sun protection, a warm layer and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In January, Constitución sees daytime highs around 18°C and nights near 15°C. Pack sun protection.

Sea temperature near Constitución

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 20 km away) is warmest in February at about 15°C and coldest in August near 12°C.

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

10°12°14°16°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan15Bracing
Feb15Cool
Mar15Bracing
Apr14Bracing
May14Bracing
Jun13Bracing
Jul13Bracing
Aug12Bracing
Sep12Bracing
Oct13Bracing
Nov13Bracing
Dec14Bracing

UV index (midday) in Constitución by month

LowModerateHighVery highExtreme

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 Constitución peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 16UV 13Jun 15UV 2
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar9Very high
Apr5High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct9Very high
Nov11Extreme
Dec12Extreme

Average hourly UV index in Constitución

LowModerateHighVery highExtreme

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 January the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan97
Feb8.56
Mar7.55
Apr50
May00
Jun00
Jul00
Aug3.50
Sep5.50
Oct7.54.5
Nov8.56
Dec96.5
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Constitución is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

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. Constitución banks about 1,302 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around February.

05001,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan201
Feb182
Mar180
Apr125
May87
Jun53
Jul30
Aug32
Sep49
Oct80
Nov118
Dec164

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.

Constitución receives about 5.5 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.1 and 8.9 kWh/m².

The brighter stretch of the year lasts 6.0 months, from around Sep 25 to Mar 25. The brightest month is December, averaging about 8.8 kWh/m² (intense).

The dimmest month is June, down near 2.2 kWh/m² — roughly 75% less than the December peak.

012345678910JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseDec 298.9 kWhJun 202.1 kWh
Solar energy (kWh/m²)Level
Jan8.7Intense
Feb7.6Intense
Mar6.0Intense
Apr4.2Bright
May2.7Moderate
Jun2.2Moderate
Jul2.5Moderate
Aug3.4Moderate
Sep5.0Bright
Oct6.7Intense
Nov8.2Intense
Dec8.8Intense

Where is Constitución?

Constitución sits at 35.3°S, 72.4°W, 19 m above sea level, in Chile. The nearest listed city is San Javier, 68 km away.

Topography around Constitución

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Constitución.

Within 3 km, the terrain around Constitución has significant variations in elevation — a maximum elevation change of 265 m around an average of 60 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 577 m; within 80 km, large variations in elevation — a maximum elevation change of 891 m.

The land around Constitución is covered by trees (35%) and water (34%) within 3 km, water (42%), trees (33%) and grassland (21%) within 16 km, and water (34%), trees (30%) and grassland (27%) within 80 km.

3 km
265 m
16 km
577 m
80 km
891 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
Nearby: San Javier 68 km · Talca 70 km · Cauquenes 71 km · San Clemente 87 km · Linares 93 km · Longaví 96 km · Colbún 100 km · Sagrada Familia 101 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
Catholic 57%none 26%Evangelical or Protestant 16%other Christians and traditions related to Christ 1%

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 Constitución (-35.3332°, -72.4116°, elevation 19 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).