Duncan is a city of approximately 23,200 people in Oklahoma, United States. Located in the Central Time Zone at 34.5°N latitude.
Across a typical year Duncan sees about 27 inches of precipitation, with June the wettest month and February the driest. Temperatures range from January lows near 27°F up to July highs around 97°F, averaging 63°F annually — characteristic of a humid subtropical climate.
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