How bout the weather?
Bring warm clothing for the early morning and evening hours during the cooler months of the year. Generally speaking, the days are warm and quite comfortable even during the colder months of the year. A light jacket or sweater would be a good bet in the fall and spring months. As in any country, altitude affects the daily weather conditions and several of the lakes on the Mexican west coast are in the foothills of the Sierra Madres Occidental mountain range. Therefore, occasional cold fronts do make it that far south during the winter months and the temperatures can be quite cool for a day or two. The rainy-monsoon season in the west coast mountains starts in mid July and it rains most every day-evening for the next 45 days. Mexican Weather Forecasts.