Climate Overview
The climate in Santiago Atitlán is temperate. The average annual temperature is 17°C and approximately 2319mm of precipitation falls per year. June is the wettest month, receiving around 439mm of rainfall. Santiago Atitlán is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: March, April, May. The coldest months are January, February, December, when temperatures can drop to 12°C.
Temperature
Santiago Atitlán sees moderate temperature variation throughout the year, ranging from 12°C to 23°C. March is the warmest month, though highs remain moderate at 23°C with a mean of 17°C. January is the coolest month, with minimum temperatures around 12°C and an average of 16°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.
Precipitation
Santiago Atitlán is a very wet location, receiving approximately 2319mm of precipitation annually, which averages out to around 193mm per month. The wettest month is June, averaging 439mm of rainfall. May and September also tend to see above-average precipitation. The driest month is January, with just 17mm. That's 422mm 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
Santiago Atitlán 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 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, 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 3km/h gap between the calmest and windiest months.
Seasons
87 days until Winter
It is currently autumn in Santiago Atitlán, which began on September 23, 2026. Santiago Atitlán 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 23°C, while the coldest stretch bottoms out in January near 12°C. Winter is next, beginning on December 21, 2026 (87 days from now).
Spring
Temperatures range from 13 to 23°C. Rainfall is heavy, totalling around 644mm across the season with a monthly average of 215mm. Winds are generally light, averaging 5km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 15 to 22°C. Rainfall is heavy, totalling around 878mm across the season with a monthly average of 293mm. Winds are generally light, averaging 5km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 14 to 22°C. Rainfall is heavy, totalling around 727mm across the season with a monthly average of 242mm. Winds are generally light, averaging 5km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 12 to 22°C. Rainfall is relatively light, with around 70mm over the season and a monthly average of 23mm. Winds are generally light, averaging 7km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Santiago Atitlán is during January, February, March, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 44mm per month. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Santiago Atitlán 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.
