Climate and average weather in San Clemente

In San Clemente, the summers are hot, dry, and clear and the winters are cool and partly cloudy.

Best: early January to late April

Over the course of the year, the temperature in San Clemente typically varies from 4°C to 28°C, and is rarely below -0°C or above 31°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 San Clemente for warm-weather activities are from early January to late April and mid October to late December.

Hottest
Jan
28°
Coldest
Jul
Wettest
Jun
221 mm
Driest
Jan
5 mm
Rain / yr
895 mm
64 wet days
Daylight
9.6–14.4 h
shortest–longest
Elevation
214 m
35.5°S
Clearest
Jan
14% cloud

San Clemente 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 April.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

The hot season lasts 3.9 months, from November 24 to March 22, with daily high temperatures above 25°C. The hottest month of the year in San Clemente is January, with an average high of 28°C and low of 14°C.

The cool season lasts 3.6 months, from May 16 to September 3, with daily high temperatures below 16°C. The coldest month of the year in San Clemente is July, with an average low of 4°C and high of 13°C.

Days typically run about 12°C warmer than nights, with the widest day–night swing (around 15°C) in January.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2814
Feb2813
Mar2512
Apr209
May167
Jun146
Jul134
Aug155
Sep177
Oct208
Nov2410
Dec2712

Average hourly temperature in San Clemente

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 28°C, and coldest before dawn in July, near C.

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

San Clemente 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
Jan28° / 14°5114.18.0
Feb28° / 13°80.913.38.5
Mar25° / 12°151.612.38.8
Apr20° / 544.411.17.5
May16° / 1448.410.25.3
Jun14° / 221129.63.7
Jul13° / 16010.29.83.8
Aug15° / 1319.310.74.6
Sep17° / 736.811.86.0
Oct20° / 475.312.97.2
Nov24° / 10°192.413.98.6
Dec27° / 12°171.714.48.6

Chance of rain

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

San Clemente gets about 895 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.

The wetter season lasts 5.6 months, from around Apr 27 to Oct 12, peaking in June at about 42% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Feb 2.

June is the wettest month by volume, with 221 mm over about 12 wet days; January is the driest, with 5 mm.

0%10%20%30%40%50%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetJun 14 · 42%Feb 2 · 2%
Rain on a day (%)Rain days
Jan31
Feb31
Mar62
Apr144
May278
Jun4012
Jul3310
Aug309
Sep237
Oct165
Nov92
Dec62

Monthly rainfall

Over a full year, San Clemente collects about 895 mm of rain across 64 wet days — roughly 75 mm in an average month.

It doesn’t fall evenly. June is the wettest month with 221 mm, while January is the driest at just 5 mm. The three wettest months alone bring about 59% of the year’s total.

050100150200250JanFebMarAprMayJunJulAugSepOctNovDec58155414422116013173471917
Rainfall (mm)Rain days
Jan51
Feb81
Mar152
Apr544
May1448
Jun22112
Jul16010
Aug1319
Sep737
Oct475
Nov192
Dec172

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In San Clemente, 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 29 and lasts for 5.6 months, ending around April 15. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 92% of the time on average.

The cloudier part of the year begins around April 16 and lasts for 6.4 months, ending around October 28. The cloudiest month is June, when it is overcast or mostly cloudy 61% 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%JanFebMarAprMayJunJulAugSepOctNovDecJan 23 · 92%Jun 18 · 37%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan928
Feb919
Mar8515
Apr6733
May4654
Jun3961
Jul4654
Aug4753
Sep5248
Oct6040
Nov7624
Dec8614

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 January 1, brings about 14 h 24 min of light; the shortest, around June 11, 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)
Jan14.16:519:00
Feb13.37:208:41
Mar12.37:478:04
Apr11.18:137:19
May10.28:386:46
Jun9.68:586:35
Jul9.88:576:46
Aug10.78:317:09
Sep11.87:477:34
Oct12.97:047:58
Nov13.96:348:28
Dec14.46:308:54

Sunny days

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

San Clemente averages about 17 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 8 and 26 days.

The sunnier stretch runs 5.2 months, from around Nov 5 to Apr 10. The sunniest month is January, with roughly 26 sunny days (brilliant).

The greyest month is June, down near 9 sunny days — about 67% fewer than the January peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightbrilliantJan 2726 daysJun 158 days
Sunny daysSky
Jan26Brilliant
Feb24Brilliant
Mar24Brilliant
Apr16Bright
May10Mixed
Jun8Mixed
Jul11Mixed
Aug10Mixed
Sep12Mixed
Oct14Mixed
Nov19Bright
Dec24Brilliant

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 San Clemente, the air stays dry or comfortable essentially all year. Even in February, the muggiest month, it feels humid or worse only about 5% 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 (%)
Jan67294
Feb62325
Mar75231
Apr9550
May9820
Jun10000
Jul10000
Aug10000
Sep9910
Oct9730
Nov9460
Dec81191

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 San Clemente is steady company: average speeds sit near 8 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeDec 22 · 9 km/hMay 8 · 7 km/h
Wind speed (km/h)Feels
Jan9calm
Feb8calm
Mar8calm
Apr7calm
May7calm
Jun8calm
Jul7calm
Aug8calm
Sep8calm
Oct9calm
Nov9calm
Dec9calm

Hazard calendar for San Clemente

In seasonPeak

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

San Clemente'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 San Clemente

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around mid January, San Clemente is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.

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 San Clemente for general outdoor tourist activities is from mid October to late April, with a peak score in the third week of March.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationMar 21 · 9.0

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
Feb8.5ideal
Mar8.8ideal
Apr7.5ideal
May5.3fair
Jun3.7fair
Jul3.8fair
Aug4.6fair
Sep6.0good
Oct7.2good
Nov8.5ideal
Dec8.6ideal

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

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationJan 25 · 9.1

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 San Clemente, 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.

For a warm-season trip around January (highs near 28°C), the essentials are light clothes and sun protection. In the cold season around July (highs near 13°C), pack a warm layer and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In January, San Clemente sees daytime highs around 28°C and nights near 14°C. Pack light clothes and sun protection.

UV index (midday) in San Clemente 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 San Clemente peaks around January 15 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 highModerateVery highExtremeJan 15UV 13Jun 15UV 2
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar9Very high
Apr5High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Average hourly UV index in San Clemente

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
Feb8.56.5
Mar74.5
Apr50
May00
Jun00
Jul00
Aug30
Sep5.50
Oct7.54.5
Nov8.56
Dec96.5

Air quality in San Clemente by month

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.

Air quality in San Clemente is worst in February — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateFeb 1425 µg/m³Dec 1412 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb26Moderate
Mar16Moderate
Apr19Moderate
May25Moderate
Jun21Moderate
Jul22Moderate
Aug21Moderate
Sep20Moderate
Oct16Moderate
Nov15Moderate
Dec12Good
Almanac & agriculture

Growing season

Chance of a frost-free dayReliably frost-free (≥90%)

San Clemente is mild enough that a frost-free day stays more likely than not even in midwinter. Nights are reliably above freezing from about August 3 to July 12 (344 days); outside that window a hard frost is an occasional risk.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecreliably frost-freereliably frost-freeAug 390%Jul 1290%
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May990
Jun950
Jul9021
Aug941
Sep990
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. San Clemente banks about 1,757 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around January.

05001,0001,5002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan337
Feb293
Mar259
Apr136
May46
Jun0
Jul0
Aug8
Sep56
Oct128
Nov206
Dec288

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.

San Clemente receives about 5.4 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.0 and 8.9 kWh/m².

The brighter stretch of the year lasts 5.9 months, from around Sep 29 to Mar 27. The brightest month is January, averaging about 8.7 kWh/m² (intense).

The dimmest month is June, down near 2.1 kWh/m² — roughly 76% less than the January peak.

012345678910JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseJan 18.9 kWhJun 192.0 kWh
Solar energy (kWh/m²)Level
Jan8.8Intense
Feb7.7Intense
Mar6.1Intense
Apr4.2Bright
May2.7Moderate
Jun2.0Moderate
Jul2.4Moderate
Aug3.2Moderate
Sep4.7Bright
Oct6.3Intense
Nov7.9Intense
Dec8.7Intense

Where is San Clemente?

San Clemente sits at 35.5°S, 71.5°W, 214 m above sea level, in Chile. The nearest listed city is Colbún, 19 km away.

Topography around San Clemente

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

Within 3 km, the terrain around San Clemente has only modest variations in elevation — a maximum elevation change of 55 m around an average of 204 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 596 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,923 m.

The land around San Clemente is covered by cropland (63%) within 3 km, cropland (45%), trees (25%) and grassland (22%) within 16 km, and trees (38%) and grassland (33%) within 80 km.

3 km
55 m
16 km
596 m
80 km
3,923 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
Nearby: Colbún 19 km · Talca 19 km · San Javier 23 km · Linares 36 km · Molina 51 km · Longaví 51 km · Sagrada Familia 61 km · Curicó 66 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 San Clemente (-35.5378°, -71.487°, elevation 214 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).