San Clemente in Summer
In summer (December, January and February), San Clemente sees average daytime highs around 27°C and overnight lows near 13°C, with 30 mm of rain over about 4 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 27°C. The sky is clear or mostly clear about 82% of the time across summer, and the air most often feels dry.
Summer is San Clemente's best season of the year to visit on our travel score. For the whole year in context, see San Clemente's year-round climate.
- Avg daytime high
- 27°C
- warmest season of the year
- Avg overnight low
- 13°C
- Rainfall
- 30 mm
- 4 wet days
- Avg wind
- 9 km/h
- Travel score
- 8.4
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in San Clemente in Summer
Across summer, daytime highs hold fairly steady around 27°C.
A typical summer day in San Clemente reaches about 27°C and drops to 13°C overnight. The warmest of the three months is January, the coolest December.
San Clemente weather by month
How the three summer months (December, January and February) 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 | 28° / 14° | 5 | 1 | 14.1 | 8.0 |
| Feb | 28° / 13° | 8 | 0.9 | 13.3 | 8.5 |
| Mar | 25° / 12° | 15 | 1.6 | 12.3 | 8.8 |
| Apr | 20° / 9° | 54 | 4.4 | 11.1 | 7.5 |
| May | 16° / 7° | 144 | 8.4 | 10.2 | 5.3 |
| Jun | 14° / 6° | 221 | 12 | 9.6 | 3.7 |
| Jul | 13° / 4° | 160 | 10.2 | 9.8 | 3.8 |
| Aug | 15° / 5° | 131 | 9.3 | 10.7 | 4.6 |
| Sep | 17° / 7° | 73 | 6.8 | 11.8 | 6.0 |
| Oct | 20° / 8° | 47 | 5.3 | 12.9 | 7.2 |
| Nov | 24° / 10° | 19 | 2.4 | 13.9 | 8.6 |
| Dec | 27° / 12° | 17 | 1.7 | 14.4 | 8.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 82% of the time across summer.
Chance of precipitation in Summer
San Clemente gets around 30 mm of rain over 4 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 12 min in early December to 12 h 54 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 8.4 kWh/m².
Hazard calendar for San Clemente
None of San Clemente's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
San Clemente's rainy season runs May–August, when most of the year's rain falls.
Is summer a good time to visit San Clemente?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit San Clemente for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for San Clemente in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, San Clemente sees daytime highs around 27°C and nights near 13°C. Pack light clothes and sun protection.
UV index in San Clemente in Summer
Clear-sky midday UV across summer averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 12 | 9 | 5 | 3 | 2 | 3 | 4 | 6 | 8 | 11 | 12 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 12 | Extreme |
| Mar | 9 | Very high |
| Apr | 5 | High |
| May | 3 | Moderate |
| Jun | 2 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Air quality in San Clemente in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 18 | 26 | 16 | 19 | 25 | 21 | 22 | 21 | 20 | 16 | 15 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 18 | Moderate |
| Feb | 26 | Moderate |
| Mar | 16 | Moderate |
| Apr | 19 | Moderate |
| May | 25 | Moderate |
| Jun | 21 | Moderate |
| Jul | 22 | Moderate |
| Aug | 21 | Moderate |
| Sep | 20 | Moderate |
| Oct | 16 | Moderate |
| Nov | 15 | Moderate |
| Dec | 12 | Good |
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.
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 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.