Autumn at Chagan Lake is characterized by cooler temperatures, vibrant foliage, and a generally pleasant climate. The lake experiences a transition from the hot summer months to the cold winter season, making it a beautiful time to visit.

Chagan Lake, located in the northern part of China's Jilin Province, experiences a temperate continental climate. During autumn, the average temperature ranges from 5°C to 15°C (41°F to 59°F), with the highest temperatures occurring in September and the lowest in November. This gradual cooling is accompanied by a significant change in vegetation, as the leaves of deciduous trees turn brilliant shades of red, orange, and yellow before falling.

The autumn season at Chagan Lake is particularly renowned for its stunning autumn foliage. The lake's surrounding forests, which are rich in deciduous trees such as maple, birch, and poplar, create a picturesque landscape. According to a study published in the Journal of Forest Research, the peak foliage period typically occurs in late October, when the color change is at its most vibrant.

The cooler temperatures during autumn also contribute to a decrease in humidity, making the air feel crisper and more comfortable. This, combined with the reduced rainfall compared to the summer months, creates ideal conditions for outdoor activities such as hiking, boating, and photography.

Data from the Jilin Provincial Meteorological Bureau indicates that the total rainfall during autumn at Chagan Lake is approximately 50-70 mm (2-3 inches), with the majority of precipitation occurring in September. This lower rainfall, coupled with the cooler temperatures, results in less frequent and shorter-duration rain showers, allowing visitors to enjoy longer periods of dry weather.

In conclusion, autumn at Chagan Lake is a delightful time of year, offering a combination of cooler temperatures, vibrant foliage, and comfortable weather conditions. The transition from summer to winter is marked by a gradual cooling, making it an ideal season for outdoor enthusiasts and nature lovers alike.