Duncan climate

Duncan Weather in July

NOAA 1991-2020 normals for Duncan, 3.3 km from Duncan

Average highs run from 99°F on July 1 to 96°F on July 31, and lows from 63°F to 66°F. Normal precipitation for the month is 1.68 in over about 7 wet days.

July day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Duncan, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

July at a glance

Average high
98°F
Average low
66°F
Precipitation
1.68 in
Record high
115°FJul 11, 2020
Record low
58°FJul 1, 2004
Chance of a freeze
0%
Days of 90°F or more
29.0
Daylight
14 h 16 min to 13 h 45 min
Cloud cover
55%
Humidity
43%
Dew point
52°F
Wind
8.1 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Jul 199°F63°F110°F 200758°F 200413%0%
Jul 299°F63°F110°F 200260°F 202614%0%
Jul 399°F63°F110°F 200763°F 200414%0%
Jul 499°F64°F111°F 200364°F 200515%0%
Jul 599°F64°F111°F 202461°F 200415%0%
Jul 699°F64°F110°F 200363°F 200416%0%
Jul 799°F65°F110°F 202466°F 200417%0%
Jul 898°F65°F111°F 202462°F 201917%0%
Jul 998°F65°F113°F 200366°F 201918%0%
Jul 1098°F65°F111°F 202064°F 200118%0%
Jul 1198°F65°F115°F 202067°F 200519%0%
Jul 1298°F66°F112°F 202066°F 201019%0%
Jul 1398°F66°F110°F 200368°F 200820%0%
Jul 1498°F66°F109°F 199865°F 201120%0%
Jul 1598°F66°F111°F 199865°F 201121%0%
Jul 1697°F66°F109°F 200365°F 201221%0%
Jul 1797°F66°F111°F 202367°F 201822%0%
Jul 1897°F66°F110°F 202367°F 199922%0%
Jul 1997°F66°F113°F 202367°F 200122%0%
Jul 2097°F66°F112°F 202367°F 201723%0%
Jul 2197°F66°F111°F 202365°F 199823%0%
Jul 2297°F66°F108°F 202268°F 199823%0%
Jul 2397°F67°F112°F 201866°F 199823%0%
Jul 2497°F67°F109°F 201864°F 202524%0%
Jul 2597°F67°F110°F 201865°F 202524%0%
Jul 2697°F67°F112°F 202367°F 202124%0%
Jul 2796°F67°F111°F 202366°F 200624%0%
Jul 2896°F67°F109°F 200966°F 199924%0%
Jul 2996°F66°F109°F 202064°F 200424%0%
Jul 3096°F66°F113°F 202067°F 199924%0%
Jul 3196°F66°F110°F 202666°F 200324%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Duncan, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MST).

July 1
sunrise 5:12 AM, sunset 7:28 PM
July 31
sunrise 5:30 AM, sunset 7:15 PM

Every day of July: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00022754 (Duncan), public domain. Records: NOAA GHCN-Daily, station USW00093084, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.