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San Carlos (CA) Weather and Climate: A Comprehensive Guide

The weather in San Carlos sees moderate temperature fluctuations over the course of a year. Temperatures can be warm at the high end to roughly mild at the low end. San Carlos has a dry climate with relatively low precipitation levels. Let’s explore the climate details in depth to provide you with a complete overview.

Average maximum day and minimum night temperature

The climate in San Carlos experiences moderate temperature changes, with mild shifts between seasons. On average, daytime temperatures range from a comfortable 26°C in September to a moderate 15°C in January.

Nighttime temperatures can drop, with average lows reaching 5°C in January. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

San Carlos tends toward drier weather patterns, receiving approximately 402 mm of rain per year. The seasons in San Carlos, bring significant changes in precipitation. The wettest month, December, receives moderate rainfall, with an average of 97 mm of precipitation. This rainfall is distributed across 12 rainy days.

In contrast, the driest month, July, experiences much less rainfall, totaling 0 mm over 0 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our San Carlos Precipitation page.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

In San Carlos, summer days are longer and more sunny, with daily sunshine hours peaking at 10.8 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 5.3 hours per average day. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: San Francisco, the United States of America (16 KM, 10 Miles).

Daily hours of sunshine

Data from: San Francisco, the United States of America (16 KM, 10 Miles).

Average water temperature

The mean water temperature over the year ranges from 12°C in January to 14°C in June.

Water temperature over the year

Data from: San Francisco, the United States of America (16 KM, 10 Miles).

Forecast for San Carlos (CA)

Mon   Dec 23
18°C | 13°C
SW 2 m/s
broken clouds and no rain

broken clouds and no rain

Tue   Dec 24
15°C | 9°C
W 7 m/s
13 mm
partly cloudy and rain

partly cloudy and rain

Wed   Dec 25
14°C | 7°C
NW 3 m/s
broken clouds and no rain

broken clouds and no rain

The best time of year to visit San Carlos in the United States of America

During the months of May, June, July, August, September and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in San Carlos?
    The hottest season / summer takes place in June, July, August and September.
  • Does San Carlos have a dry season?
    Yes, the months of May, June, July, August and September are very dry.
  • Which is the warmest month in San Carlos?
    September has an average maximum temperature of 26°C and is the warmest month of the year.
  • Which is the coldest month in San Carlos?
    The coldest month is December with an average maximum temperature of 15°C.
  • Which is the wettest month in San Carlos?
    December tops the wettest month list with 97 mm of rainfall.
  • Which is the driest month in San Carlos?
    July is the driest month with 0 mm of precipitation.
  • Which is the sunniest month in San Carlos?
    May is the sunniest month with an average of 324 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.