Duncan Weather in May
Average highs run from 84°F on May 1 to 95°F on May 31, and lows from 43°F to 52°F. Normal precipitation for the month is 0.29 in over about 2 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 89°F
- Average low
- 47°F
- Precipitation
- 0.29 in
- Record high
- 109°FMay 22, 2005
- Record low
- 36°FMay 1, 2010
- Chance of a freeze
- 29%
- Days of 90°F or more
- 16.7
- Daylight
- 13 h 29 min to 14 h 09 min
- Cloud cover
- 29%
- Humidity
- 27%
- Dew point
- 28°F
- Wind
- 10.1 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 84°F | 43°F | 100°F 2020 | 36°F 2010 | 4% | 0% |
| May 2 | 84°F | 43°F | 98°F 2020 | 40°F 1999 | 4% | 0% |
| May 3 | 84°F | 43°F | 97°F 2000 | 36°F 2010 | 4% | 0% |
| May 4 | 85°F | 44°F | 98°F 2000 | 41°F 2010 | 4% | 0% |
| May 5 | 85°F | 44°F | 99°F 2017 | 40°F 2001 | 4% | 0% |
| May 6 | 85°F | 44°F | 102°F 2020 | 45°F 2001 | 4% | 0% |
| May 7 | 86°F | 45°F | 102°F 2020 | 44°F 2024 | 4% | 0% |
| May 8 | 86°F | 45°F | 101°F 2009 | 47°F 2005 | 4% | 0% |
| May 9 | 86°F | 45°F | 101°F 2018 | 43°F 1998 | 4% | 0% |
| May 10 | 87°F | 45°F | 101°F 2018 | 44°F 2015 | 4% | 0% |
| May 11 | 87°F | 46°F | 100°F 2009 | 42°F 2023 | 4% | 0% |
| May 12 | 87°F | 46°F | 102°F 2026 | 43°F 2005 | 4% | 0% |
| May 13 | 88°F | 46°F | 100°F 2016 | 41°F 2022 | 4% | 0% |
| May 14 | 88°F | 47°F | 100°F 2006 | 43°F 2008 | 5% | 0% |
| May 15 | 88°F | 47°F | 103°F 2000 | 39°F 1998 | 5% | 0% |
| May 16 | 89°F | 47°F | 98°F 2003 | 43°F 1998 | 5% | 0% |
| May 17 | 89°F | 47°F | 101°F 2003 | 41°F 2017 | 5% | 0% |
| May 18 | 90°F | 48°F | 100°F 2020 | 50°F 2000 | 5% | 0% |
| May 19 | 90°F | 48°F | 102°F 2008 | 49°F 2016 | 5% | 0% |
| May 20 | 90°F | 48°F | 105°F 2005 | 44°F 2011 | 5% | 0% |
| May 21 | 91°F | 49°F | 108°F 2005 | 38°F 2019 | 5% | 0% |
| May 22 | 91°F | 49°F | 109°F 2005 | 46°F 2002 | 5% | 0% |
| May 23 | 92°F | 49°F | 109°F 2005 | 48°F 2008 | 5% | 0% |
| May 24 | 92°F | 49°F | 105°F 2005 | 44°F 2019 | 5% | 0% |
| May 25 | 92°F | 50°F | 102°F 2001 | 45°F 2010 | 5% | 0% |
| May 26 | 93°F | 50°F | 102°F 2001 | 51°F 2010 | 5% | 0% |
| May 27 | 93°F | 50°F | 104°F 2020 | 51°F 2016 | 5% | 0% |
| May 28 | 94°F | 51°F | 106°F 2020 | 47°F 2012 | 5% | 0% |
| May 29 | 94°F | 51°F | 108°F 2000 | 49°F 2019 | 5% | 0% |
| May 30 | 94°F | 51°F | 107°F 2002 | 52°F 2019 | 5% | 0% |
| May 31 | 95°F | 52°F | 109°F 2002 | 50°F 2011 | 5% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- May 1
- sunrise 5:29 AM, sunset 6:58 PM
- May 31
- sunrise 5:10 AM, sunset 7:19 PM
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.