Climate Insights for San Martín

The climate in San Martín is warm and mild. The average annual temperature is 22°C and approximately 234mm of precipitation falls per year. October is the wettest month, receiving around 33mm of rainfall. San Martín sits near the equator, so seasonal temperature differences are minimal throughout the year.

San Martín sees moderate temperature variation throughout the year, ranging from 11°C to 26°C. The warmest month is April, when average highs reach 26°C and the mean temperature sits around 18°C. April is the coolest month, with minimum temperatures around 11°C and an average of 18°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between March and April, with a 5°C shift in average temperatures.

San Martín is a quite dry location, receiving approximately 234mm of precipitation annually, which averages out to around 20mm per month. The wettest month is February, averaging 33mm of rainfall. June and July also tend to see above-average precipitation. The driest month is April, with just 0mm. That's 33mm less than February, 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 Martín is relatively calm, with an average annual wind speed of 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 9km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently summer in San Martín, which began on June 21, 2026. San Martín sits near the equator, so the traditional four-season cycle is less pronounced. Temperatures remain relatively stable year-round. The warmest period peaks in April at around 26°C, while the coldest stretch bottoms out in April near 11°C. Autumn is next, beginning on September 23, 2026 (16 days from now).

The best time to visit San Martín is during January, February, March, April, May, June, July, August, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 20mm per month. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for San Martín 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.