Climate Overview
The climate in San Martín is hot. The average annual temperature is 27°C and approximately 1666mm of precipitation falls per year. June is the wettest month, receiving around 334mm of rainfall. San Martín is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: March, February, April. The coldest months are January, February, December, when temperatures can drop to 21°C.
Temperature
San Martín sees moderate temperature variation throughout the year, ranging from 21°C to 35°C. March is the hottest month, with daytime highs reaching 35°C and an average of 28°C. January is the coolest month, with minimum temperatures around 21°C and an average of 26°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs.
Precipitation
San Martín is a fairly wet location, receiving approximately 1666mm of precipitation annually, which averages out to around 139mm per month. The wettest month is June, averaging 334mm of rainfall. September and October also tend to see above-average precipitation. The driest month is January, with just 1mm. That's 332mm less than June, 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.
Wind
San Martín is relatively calm, with an average annual wind speed of 9km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 12km/h in winter, 11km/h in spring, 8km/h in summer, 8km/h in autumn.
Seasons
89 days until Summer
It is currently spring in San Martín, which began on March 20, 2026. San Martín is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in March at around 35°C, while the coldest stretch bottoms out in January near 21°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 22 to 35°C. Precipitation is moderate at around 301mm for the season, averaging 100mm per month. Winds are generally light, averaging 11km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 23 to 33°C. Rainfall is heavy, totalling around 713mm across the season with a monthly average of 238mm. Winds are generally light, averaging 8km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 22 to 32°C. Rainfall is heavy, totalling around 641mm across the season with a monthly average of 214mm. Winds are generally light, averaging 8km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 35°C. Precipitation is minimal, with only around 12mm for the entire season. Winds are generally light, averaging 12km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
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.
