Climate Insights for San Luis Potosí

The climate in San Luis Potosí is temperate. The average annual temperature is 18°C and approximately 463mm of precipitation falls per year. June is the wettest month, receiving around 79mm of rainfall. San Luis Potosí is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, April, June. The coldest months are January, December, February, when temperatures can drop to 7°C.

Temperatures in San Luis Potosí vary considerably across the year, with a 22°C difference between the coldest and warmest months. The warmest month is May, when average highs reach 29°C and the mean temperature sits around 22°C. January is the coolest month, with minimum temperatures around 7°C and an average of 13°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 3°C shift in average temperatures.

San Luis Potosí is a relatively dry area, receiving approximately 463mm of precipitation annually, which averages out to around 39mm per month. The wettest month is June, averaging 79mm of rainfall. September and July also tend to see above-average precipitation. The driest month is January, with just 8mm. That's 71mm 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.

San Luis Potosí is mildly breezy, with an average annual wind speed of 19km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 22km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in November, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 18km/h in winter, 21km/h in spring, 21km/h in summer, 17km/h in autumn.

It is currently spring in San Luis Potosí, which began on March 20, 2026. San Luis Potosí 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 May at around 29°C, while the coldest stretch bottoms out in January near 7°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit San Luis Potosí is during March, April, May, June, July, August, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 48mm per month. By contrast, January can be quite cold with temperatures dropping to 7°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for San Luis Potosí 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.