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Duncan, OK weather and climate

Stephens County, OK · population 22,872 · about 1,112 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Duncan's own coordinates.

The year at a glance

Sunny days
253
clear or partly cloudy, per year
Precipitation
33 in
per year
Wet days
82
rain or snow per year
Snowfall
3 in
per year
Hot days
77
above 90 °F
Freezing nights
69
at or below 32 °F
Humidity
61%
average relative
Average temperature
62 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 52 °FDaily high, Feb: 56 °FDaily high, Mar: 65 °FDaily high, Apr: 73 °FDaily high, May: 80 °FDaily high, Jun: 89 °FDaily high, Jul: 94 °FDaily high, Aug: 93 °FDaily high, Sep: 86 °FDaily high, Oct: 76 °FDaily high, Nov: 64 °FDaily high, Dec: 54 °FDaily low, Jan: 28 °FDaily low, Feb: 32 °FDaily low, Mar: 41 °FDaily low, Apr: 49 °FDaily low, May: 59 °FDaily low, Jun: 68 °FDaily low, Jul: 72 °FDaily low, Aug: 71 °FDaily low, Sep: 63 °FDaily low, Oct: 51 °FDaily low, Nov: 39 °FDaily low, Dec: 31 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high525665738089949386766454
Daily low283241495968727163513931

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovDuncan, Jan: 1.5 inDuncan, Feb: 1.9 inDuncan, Mar: 3.1 inDuncan, Apr: 3.6 inDuncan, May: 4.8 inDuncan, Jun: 3.6 inDuncan, Jul: 1.8 inDuncan, Aug: 1.9 inDuncan, Sep: 2.8 inDuncan, Oct: 3.5 inDuncan, Nov: 2.1 inDuncan, Dec: 2.0 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Duncan1.51.93.13.64.83.61.81.92.83.52.12.0

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovDuncan, Jan: 21 daysDuncan, Feb: 17 daysDuncan, Mar: 20 daysDuncan, Apr: 20 daysDuncan, May: 19 daysDuncan, Jun: 21 daysDuncan, Jul: 25 daysDuncan, Aug: 25 daysDuncan, Sep: 23 daysDuncan, Oct: 23 daysDuncan, Nov: 21 daysDuncan, Dec: 20 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Duncan211720201921252523232120

Compare Duncan with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Oklahoma city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).