Climate Overview
The climate in San Luis is hot. The average annual temperature is 25°C and approximately 1296mm of precipitation falls per year. June is the wettest month, receiving around 214mm of rainfall. San Luis is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, September. The coldest months are January, February, March, when temperatures can drop to 19°C.
Temperature
San Luis sees moderate temperature variation throughout the year, ranging from 19°C to 31°C. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 19°C and an average of 22°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.
Precipitation
San Luis is a fairly wet location, receiving approximately 1296mm of precipitation annually, which averages out to around 108mm per month. The wettest month is June, averaging 214mm of rainfall. October and May also tend to see above-average precipitation. The driest month is March, with just 17mm. That's 196mm 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 Luis is relatively calm, with an average annual wind speed of 3km/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 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
89 days until Autumn
It is currently summer in San Luis, which began on June 21, 2026. San Luis 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 July at around 31°C, while the coldest stretch bottoms out in January near 19°C. Autumn is next, beginning on September 23, 2026 — 89 days from now.
Spring
Temperatures range from 20 to 29°C. Precipitation is moderate at around 242mm for the season, averaging 81mm per month. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 31°C. Rainfall is heavy, totalling around 522mm across the season with a monthly average of 174mm. Winds are generally light, averaging 3km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 21 to 30°C. Rainfall is heavy, totalling around 411mm across the season with a monthly average of 137mm. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 19 to 27°C. Rainfall is relatively light, with around 121mm over the season and a monthly average of 40mm. Winds are generally light, averaging 4km/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 San Luis is during January, February, March, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 39mm per month. By contrast, July can be uncomfortably hot with temperatures reaching 31°C. 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 San Luis 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.
