Climate Overview
The climate in Santiago is temperate. The average annual temperature is 18°C and approximately 3661mm of precipitation falls per year. Santiago receives a notable amount of rainfall throughout the year, including during its driest month. Santiago sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Santiago has relatively stable temperatures year-round, staying within a 10°C range. November is the warmest month, though highs remain moderate at 23°C with a mean of 18°C. August is the coolest month, with minimum temperatures around 13°C and an average of 17°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.
Precipitation
Santiago is a very wet location, receiving approximately 3661mm of precipitation annually, which averages out to around 305mm per month. The wettest month is June, averaging 427mm of rainfall. December and November also tend to see above-average precipitation. The driest month is September, with just 113mm. That's 313mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.
Wind
Santiago 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 May, 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.
Seasons
83 days until Autumn
It is currently summer in Santiago, which began on June 21, 2026. Santiago sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in November at around 23°C, while the coldest stretch bottoms out in August near 13°C. Autumn is next, beginning on September 23, 2026 — 83 days from now.
Spring
Temperatures range from 15 to 23°C. Rainfall is heavy, totalling around 978mm across the season with a monthly average of 326mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 13 to 21°C. Rainfall is heavy, totalling around 876mm across the season with a monthly average of 292mm. Winds are generally light, averaging 1km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 13 to 23°C. Rainfall is heavy, totalling around 783mm across the season with a monthly average of 261mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 15 to 23°C. Rainfall is heavy, totalling around 1024mm across the season with a monthly average of 341mm. Winds are generally light, averaging 1km/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 Santiago 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.
