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Duncan, Oklahoma, United States has a temperate climate with four distinct seasons.
In winter, temperatures range from an average low of 25°F in January to an average high of 48°F in February. Occasional snowfall is common, with an average of 3 inches of snowfall per year.
In spring, temperatures range from an average low of 42°F in March to an average high of 72°F in May. Rainfall increases gradually throughout the season, with an average of 3.5 inches per month in April and 5.5 inches per month in May.
In summer, temperatures range from an average low of 68°F in June to an average high of 93°F in July and August. Rainfall is highest during the summer months, with an average of 6.5 inches per month in July and August.
In fall, temperatures range from an average low of 48°F in September to an average high of 72°F in October. Rainfall decreases gradually throughout the season, with an average of 4 inches per month in September and 2.5 inches per month in October.
As of 2020, the city population is 22529.
This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Duncan, Oklahoma.