San Carlos Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit San Carlos.
Climate overview of San Carlos
San Carlos, in Sonora, Mexico, experiences significant temperature changes throughout the year. Very hot summers shift to warm winters, while the area maintains low rainfall patterns with dry conditions year-round. The dry climate and consistent sunshine make it a popular winter retreat for snowbirds escaping colder climates. Let's explore all the climate details to give you a complete overview on when to visit.
San Carlos Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Carlos - and find the best time to visit.
Monthly Temperature in San Carlos
Depending on the time of the year, temperatures range from very hot to comfortable in San Carlos. Average maximum daytime temperatures range from a very hot 35°C (95°F) in August, the warmest time of the year, to a comfortable 23°C (73°F) during cooler months like January.
At night, you can expect temperatures ranging from 29°C (84°F) in August to around 14°C (57°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in San Carlos
San Carlos has a dry climate with very low precipitation, averaging 188 mm (7.4 in) of rainfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, September it receives moderate rainfall, averaging 69 mm (2.7 in) of precipitation, recorded across 3 rainy days. In contrast, the driest month May brings less rainfall, with 0.4 mm (0.02 in) over 0 rainy days. For more details, please visit our San Carlos Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit San Carlos
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, April, November and December
- Warmest weather: July, August and September
- Seasonal pattern: Very little rainfall for most of the year, with very hot summers and warm winters
Frequently asked questions about the climate in San Carlos
What is the best time to visit San Carlos?
January, February, March, April, November and December typically offer the most optimal weather in San Carlos. In contrast, July, August and September tend to have less optimal conditions. San Carlos has very little rainfall for most of the year, with very hot summers and warm winters.
What temperatures can I expect in San Carlos?
Daytime highs range from 23°C (73°F) in January to 35°C (95°F) in August. Nighttime lows range from 14°C (57°F) to 29°C (84°F). Temperatures vary considerably through the year.
How much rain does San Carlos get?
Annual rainfall is around 188 mm (7.4 in). September is the wettest month with 69 mm (2.7 in), while May is the driest with 0.4 mm (0.02 in).
San Carlos 3-Day Forecast
San Carlos on the map
San Carlos is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Puerto Peñasco
35°C (95°F) Los Cabos34°C (93°F) Playa del Carmen
31°C (88°F) Tulum31°C (88°F) Cancún
31°C (88°F) Puerto Vallarta
30°C (86°F) San Miguel de Allende28°C (82°F) Mexico City23°C (73°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Explore the Majestic Copper Canyons of Mexico
Explore the vast Copper Canyons in Chihuahua, Mexico—larger than the Grand Canyon. Discover scenic train rides, hikes, and the Tarahumara people.
These are the most beautiful Mayan ruins and Mayan temples in Mexico
Mexico is a destination where you can immerse yourself in ancient cultures and civilizations. In this article we have listed our favorite Mayan ruins.
Tips, to-do's and nicest restaurants in Mexico City
Mexico City, one of the most famous and notorious cities of the world. The best time to visit is between March and May, but it can be visited year round.
Zihuatanejo: A Pacific paradise with beautiful beaches
Zihuatanejo has some of Mexico's top beaches. Unlike other off-the-beaten-path destinations in Mexico, Zihua is very accessible and sustainable.