San Carlos in Winter
In winter (December, January and February), San Carlos sees average daytime highs around 23°C and overnight lows near 13°C, with 24 mm of rain over about 3 wet days across the season. It is the coldest season of the year and the 3rd-wettest season.
Across winter, daytime highs hold fairly steady around 23°C. The sky is clear or mostly clear about 65% of the time across winter, and the air most often feels dry.
Winter is San Carlos's best season of the year to visit on our travel score. For the whole year in context, see San Carlos's year-round climate.
- Avg daytime high
- 23°C
- coldest season of the year
- Avg overnight low
- 13°C
- Rainfall
- 24 mm
- 3 wet days
- Avg wind
- 13 km/h
- Travel score
- 8.8
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in San Carlos in Winter
Across winter, daytime highs hold fairly steady around 23°C.
A typical winter day in San Carlos reaches about 23°C and drops to 13°C overnight. The warmest of the three months is February, the coolest January.
How winter really feels in San Carlos
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
San Carlos weather by month
How the three winter 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 | 23° / 12° | 6 | 1 | 10.4 | 8.8 |
| Feb | 24° / 13° | 7 | 1.2 | 11 | 8.8 |
| Mar | 26° / 15° | 4 | 0.5 | 11.8 | 8.8 |
| Apr | 28° / 18° | 1 | 0.3 | 12.6 | 7.9 |
| May | 31° / 21° | 0 | 0 | 13.4 | 6.1 |
| Jun | 34° / 26° | 1 | 0.2 | 13.7 | 4.3 |
| Jul | 35° / 29° | 10 | 2.4 | 13.6 | 3.1 |
| Aug | 35° / 29° | 22 | 4.2 | 13 | 3.0 |
| Sep | 34° / 27° | 62 | 5.4 | 12.2 | 3.7 |
| Oct | 32° / 23° | 18 | 2.3 | 11.3 | 5.5 |
| Nov | 27° / 17° | 12 | 1.3 | 10.6 | 8.1 |
| Dec | 23° / 13° | 10 | 1.2 | 10.3 | 8.8 |
Cloud cover in Winter
The sky is clear or mostly clear about 65% of the time across winter.
Chance of precipitation in Winter
San Carlos gets around 24 mm of rain over 3 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 13 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 24 min in early December to 11 h 18 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.4 kWh/m².
Hazard calendar for San Carlos
None of San Carlos's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
San Carlos sits in the eastern Pacific hurricane zone; the season peaks August–September.
Is winter a good time to visit San Carlos?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit San Carlos for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for San Carlos in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, San Carlos sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes and sun protection.
Sea temperature near San Carlos in Winter
The nearest coast averages about 19°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 30°C and coldest in February near 18°C.
It's comfortable for a long swim from Apr 6 to Dec 16 — about 8.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 18 | 18 | 19 | 21 | 24 | 27 | 29 | 30 | 30 | 28 | 23 | 20 |
| Comfort | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Tropical | Tropical | Tropical | Warm | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 18 | Cool |
| Feb | 18 | Cool |
| Mar | 19 | Cool |
| Apr | 21 | Refreshing |
| May | 24 | Refreshing |
| Jun | 27 | Warm |
| Jul | 29 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 28 | Warm |
| Nov | 23 | Refreshing |
| Dec | 20 | Cool |
UV index in San Carlos in Winter
Clear-sky midday UV across winter averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Carlos peaks around July 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 6 | 8 | 10 | 10 | 12 | 12 | 11 | 10 | 7 | 5 | 4 |
| Level | Moderate | High | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 6 | High |
| Mar | 8 | Very high |
| Apr | 10 | Very high |
| May | 10 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 7 | Very high |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Air quality in San Carlos in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in San Carlos is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (January, 5 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) | 5 | 5 | 5 | 6 | 5 | 8 | 18 | 13 | 8 | 5 | 5 | 5 |
| Level | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 5 | Good |
| Feb | 5 | Good |
| Mar | 5 | Good |
| Apr | 6 | Good |
| May | 5 | Good |
| Jun | 8 | Good |
| Jul | 18 | Moderate |
| Aug | 13 | Moderate |
| Sep | 8 | Good |
| Oct | 5 | Good |
| Nov | 5 | Good |
| Dec | 5 | Good |
Where is San Carlos?
San Carlos sits at 28.0°N, 111.0°W, 0 m above sea level, in Mexico. The nearest listed city is Heroica Guaymas, 15 km away.
Topography around San Carlos
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Carlos.
Within 3 km, the terrain around San Carlos has only modest variations in elevation — a maximum elevation change of 236 m around an average of 23 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 838 m; within 80 km, large variations in elevation — a maximum elevation change of 1,146 m.
The land around San Carlos is covered by water (40%) and shrubs (39%) within 3 km, shrubs (46%) and water (46%) within 16 km, and shrubs (46%) and water (42%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- 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 Carlos (27.9575°, -111.0435°, elevation 0 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.