Climate Insights for San Carlos

The climate in San Carlos is warm and mild. The average annual temperature is 23°C and approximately 2287mm of precipitation falls per year. San Carlos receives a notable amount of rainfall throughout the year, including during its driest month. San Carlos sits near the equator, so seasonal temperature differences are minimal throughout the year.

San Carlos sees moderate temperature variation throughout the year, ranging from 18°C to 30°C. The warmest month is August, when average highs reach 30°C and the mean temperature sits around 24°C. January is the coolest month, with minimum temperatures around 18°C and an average of 22°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.

San Carlos is a very wet location, receiving approximately 2287mm of precipitation annually, which averages out to around 191mm per month. The wettest month is November, averaging 416mm of rainfall. October and April also tend to see above-average precipitation. The driest month is July, with just 77mm. That's 339mm less than November, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

San Carlos is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 1km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.

It is currently summer in San Carlos, which began on June 21, 2026. San Carlos sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in August at around 30°C, while the coldest stretch bottoms out in January near 18°C. Autumn is next, beginning on September 23, 2026 — 83 days from now.

The best time to visit San Carlos is during February, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 85mm per month. By contrast, January can be quite cold with temperatures dropping to 18°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for San Carlos based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.