Climate Overview
The climate in San Andrés is hot. The average annual temperature is 27°C and approximately 1872mm of precipitation falls per year. San Andrés receives a notable amount of rainfall throughout the year, including during its driest month. San Andrés is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, August, June. The coldest months are January, February, March, when temperatures can drop to 26°C.
Temperature
San Andrés has relatively stable temperatures year-round, staying within a 2°C range. The warmest month is September, when average highs reach 28°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 26°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows.
Precipitation
San Andrés is a fairly wet location, receiving approximately 1872mm of precipitation annually, which averages out to around 156mm per month. The wettest month is October, averaging 286mm of rainfall. November and June also tend to see above-average precipitation. The driest month is March, with just 31mm. That's 255mm less than October, 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 Andrés 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 December, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months.
Seasons
84 days until Autumn
It is currently summer in San Andrés, which began on June 21, 2026. San Andrés 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 September at around 28°C, while the coldest stretch bottoms out in January near 26°C. Autumn is next, beginning on September 23, 2026 — 84 days from now.
Spring
Temperatures range from 26 to 28°C. Precipitation is moderate at around 237mm for the season, averaging 79mm per month. Winds are generally light, averaging 6km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 27 to 28°C. Rainfall is heavy, totalling around 635mm across the season with a monthly average of 212mm. Winds are generally light, averaging 7km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 747mm across the season with a monthly average of 249mm. Winds are generally light, averaging 5km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 26 to 27°C. Precipitation is moderate at around 253mm for the season, averaging 84mm per month. Winds are generally light, averaging 7km/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 Andrés 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.
