Duncan climate

Duncan Weather in August

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

Average highs run from 96°F on August 1 to 94°F on August 31, and lows from 66°F to 62°F. Normal precipitation for the month is 2.18 in over about 7 wet days.

August 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

August at a glance

Average high
96°F
Average low
65°F
Precipitation
2.18 in
Record high
113°FAug 15, 2020
Record low
57°FAug 25, 2002
Chance of a freeze
0%
Days of 90°F or more
27.6
Daylight
13 h 44 min to 12 h 51 min
Cloud cover
52%
Humidity
48%
Dew point
54°F
Wind
7.2 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
Aug 196°F66°F108°F 202668°F 200124%0%
Aug 296°F66°F107°F 202467°F 200624%0%
Aug 396°F66°F109°F 202668°F 201324%0%
Aug 496°F66°F108°F 200966°F 199924%0%
Aug 596°F66°F111°F 202366°F 199924%0%
Aug 696°F66°F111°F 202563°F 200224%0%
Aug 796°F66°F110°F 202563°F 201724%0%
Aug 896°F66°F108°F 202565°F 200024%0%
Aug 996°F66°F108°F 201264°F 201323%0%
Aug 1096°F66°F110°F 200367°F 202123%0%
Aug 1196°F66°F107°F 202066°F 201823%0%
Aug 1296°F65°F108°F 201265°F 199923%0%
Aug 1396°F65°F109°F 202063°F 199923%0%
Aug 1496°F65°F111°F 202066°F 200923%0%
Aug 1596°F65°F113°F 202067°F 199823%0%
Aug 1696°F65°F108°F 202064°F 199823%0%
Aug 1796°F65°F106°F 202362°F 201722%0%
Aug 1896°F65°F105°F 200960°F 201722%0%
Aug 1996°F64°F108°F 202462°F 200422%0%
Aug 2096°F64°F110°F 202061°F 200422%0%
Aug 2195°F64°F107°F 201963°F 200222%0%
Aug 2295°F64°F107°F 202661°F 200422%0%
Aug 2395°F64°F107°F 202663°F 200222%0%
Aug 2495°F64°F105°F 201161°F 200221%0%
Aug 2595°F63°F109°F 202657°F 200221%0%
Aug 2695°F63°F110°F 202663°F 200421%0%
Aug 2795°F63°F109°F 201960°F 200421%0%
Aug 2895°F63°F108°F 200562°F 200621%0%
Aug 2995°F62°F107°F 201163°F 201821%0%
Aug 3094°F62°F106°F 201161°F 200020%0%
Aug 3194°F62°F106°F 201157°F 200020%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).

August 1
sunrise 5:31 AM, sunset 7:15 PM
August 31
sunrise 5:51 AM, sunset 6:42 PM

Every day of August: 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.