Climate Insights for Colotlán

The climate in Colotlán is temperate. The average annual temperature is 18°C and approximately 845mm of precipitation falls per year. July is the wettest month, receiving around 239mm of rainfall. Colotlán is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, June, April. The coldest months are January, December, February, when temperatures can drop to 6°C.

Temperatures in Colotlán vary considerably across the year, with a 24°C difference between the coldest and warmest months. The warmest month is May, when average highs reach 30°C and the mean temperature sits around 22°C. January is the coolest month, with minimum temperatures around 6°C and an average of 13°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 3°C shift in average temperatures.

Colotlán is a moderately rainy area, receiving approximately 845mm of precipitation annually, which averages out to around 70mm per month. The wettest month is July, averaging 239mm of rainfall. August and September also tend to see above-average precipitation. The driest month is April, with just 4mm. That's 235mm less than July, 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.

Colotlán is mildly breezy, with an average annual wind speed of 12km/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 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 8km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 10km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 13km/h in winter, 17km/h in spring, 9km/h in summer, 10km/h in autumn.

It is currently spring in Colotlán, which began on March 20, 2026. Colotlán 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 30°C, while the coldest stretch bottoms out in January near 6°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Colotlán is during February, March, April, May, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 21mm per month. By contrast, January can be quite cold with temperatures dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Colotlán 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.