With a population of around 1,500, Winchester sits in Illinois, United States. The city operates in the Central Time Zone.
In 2025, Winchester recorded an average annual temperature of 55°F. The hottest temperatures reached 94°F in June; the coolest were -5°F in January. Total precipitation for the year was 31 inches, with the wettest month being April. Snowfall for the year totaled approximately 7 inches.
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