Climate Insights for San Juan Mazatlán

The climate in San Juan Mazatlán is warm and mild. The average annual temperature is 22°C and approximately 1683mm of precipitation falls per year. San Juan Mazatlán receives a notable amount of rainfall throughout the year, including during its driest month. San Juan Mazatlán 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, February, December, when temperatures can drop to 15°C.

San Juan Mazatlán sees moderate temperature variation throughout the year, ranging from 15°C to 31°C. The warmest month is May, when average highs reach 31°C and the mean temperature sits around 26°C. January is the coolest month, with minimum temperatures around 15°C and an average of 19°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 2°C shift in average temperatures.

San Juan Mazatlán is a fairly wet location, receiving approximately 1683mm of precipitation annually, which averages out to around 140mm per month. The wettest month is June, averaging 298mm of rainfall. August and September also tend to see above-average precipitation. The driest month is March, with just 32mm. That's 266mm 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 Juan Mazatlán is mildly breezy, with an average annual wind speed of 13km/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 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 14km/h in winter, 15km/h in spring, 12km/h in summer, 13km/h in autumn.

It is currently spring in San Juan Mazatlán, which began on March 20, 2026. San Juan Mazatlán 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 31°C, while the coldest stretch bottoms out in January near 15°C. Summer is next, beginning on June 21, 2026 — 82 days from now.

The best time to visit San Juan Mazatlán is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 51mm per month. By contrast, May 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.

The table below shows monthly climate averages for San Juan Mazatlán 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.