Duncan Weather Records (USC00022754)
Record envelope, standing records and threshold days for Duncan (USC00022754), Arizona, United States, with 126 years of record.
Key Facts for Duncan
- Duncan (USC00022754) is a weather station in Arizona, United States at 32.75 latitude and -109.12 longitude, 1,116 m (3,660 ft) above sea level.
- The station reports from 1901 to 2026, 126 years of record.
- 1,464 records set at Duncan still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Duncan set a daily record high minimum temperature of 21.1 C (70.0 F) on 9 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Arizona, United States, 32.75 latitude, -109.12 longitude.
- Elevation: 1,116 m (3,660 ft).
- Period of record: 1901 to 2026, 126 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
24 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 26.7 C (80.1 F) | -18.9 C (-2.0 F) | 20.6 C (69.1 F) | -7.2 C (19.0 F) |
| Feb | 30.6 C (87.1 F) | -18.9 C (-2.0 F) | 30.6 C (87.1 F) | -5.0 C (23.0 F) |
| Mar | 36.7 C (98.1 F) | -13.3 C (8.1 F) | 36.7 C (98.1 F) | -3.3 C (26.1 F) |
| Apr | 37.8 C (100.0 F) | -10.6 C (12.9 F) | 36.1 C (97.0 F) | -0.6 C (30.9 F) |
| May | 42.2 C (108.0 F) | -5.6 C (21.9 F) | 38.3 C (100.9 F) | 3.9 C (39.0 F) |
| Jun | 43.9 C (111.0 F) | 0.0 C (32.0 F) | 42.8 C (109.0 F) | 8.9 C (48.0 F) |
| Jul | 45.0 C (113.0 F) | 5.6 C (42.1 F) | 43.9 C (111.0 F) | 10.6 C (51.1 F) |
| Aug | 43.9 C (111.0 F) | 6.1 C (43.0 F) | 42.8 C (109.0 F) | 17.2 C (63.0 F) |
| Sep | 40.6 C (105.1 F) | 1.1 C (34.0 F) | 38.9 C (102.0 F) | 21.1 C (70.0 F) |
| Oct | 37.2 C (99.0 F) | -11.1 C (12.0 F) | 28.3 C (82.9 F) | 11.1 C (52.0 F) |
| Nov | 31.1 C (88.0 F) | -14.4 C (6.1 F) | n/a | n/a |
| Dec | 26.1 C (79.0 F) | -18.9 C (-2.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1901 | 8 |
| 1902 | 28 |
| 1903 | 28 |
| 1904 | 26 |
| 1905 | 29 |
| 1906 | 14 |
| 1907 | 1 |
| 1941 | 1 |
| 1948 | 16 |
| 1949 | 30 |
| 1950 | 20 |
| 1951 | 15 |
| 1952 | 10 |
| 1953 | 22 |
| 1954 | 10 |
| 1955 | 17 |
| 1956 | 22 |
| 1957 | 28 |
| 1958 | 19 |
| 1959 | 12 |
| 1960 | 10 |
| 1961 | 8 |
| 1962 | 18 |
| 1963 | 8 |
| 1964 | 25 |
| 1965 | 13 |
| 1966 | 10 |
| 1967 | 19 |
| 1968 | 17 |
| 1969 | 11 |
| 1970 | 11 |
| 1971 | 17 |
| 1972 | 19 |
| 1973 | 23 |
| 1974 | 17 |
| 1975 | 35 |
| 1976 | 26 |
| 1977 | 8 |
| 1978 | 18 |
| 1979 | 34 |
| 1980 | 16 |
| 1981 | 8 |
| 1982 | 9 |
| 1983 | 16 |
| 1984 | 18 |
| 1985 | 19 |
| 1986 | 15 |
| 1987 | 22 |
| 1988 | 16 |
| 1989 | 28 |
| 1990 | 21 |
| 1991 | 12 |
| 1992 | 18 |
| 1993 | 14 |
| 1994 | 13 |
| 1995 | 10 |
| 1996 | 14 |
| 1997 | 7 |
| 1998 | 14 |
| 1999 | 16 |
| 2000 | 30 |
| 2001 | 18 |
| 2002 | 11 |
| 2003 | 27 |
| 2004 | 8 |
| 2005 | 14 |
| 2006 | 12 |
| 2007 | 9 |
| 2008 | 10 |
| 2009 | 12 |
| 2010 | 11 |
| 2011 | 18 |
| 2012 | 10 |
| 2013 | 12 |
| 2014 | 12 |
| 2015 | 9 |
| 2016 | 12 |
| 2017 | 15 |
| 2018 | 19 |
| 2019 | 22 |
| 2020 | 38 |
| 2021 | 15 |
| 2022 | 7 |
| 2023 | 27 |
| 2024 | 17 |
| 2025 | 35 |
| 2026 | 25 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1987-06-08 | Record daily precipitation | Record daily precipitation 61.7 mm (2.4 in) |
| 1989-06-19 | Record high maximum temperature | Record high maximum temperature 43.3 C (109.9 F) |
| 1994-06-25 | Record high maximum temperature | Record high maximum temperature 43.9 C (111.0 F) |
| 1999-08-28 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
| 2007-08-03 | Record daily precipitation | Record daily precipitation 63.5 mm (2.5 in) |
| 2014-08-01 | Record daily precipitation | Record daily precipitation 80.8 mm (3.2 in) |
| 2020-07-11 | Record high maximum temperature | Record high maximum temperature 45.0 C (113.0 F) |
Wettest Day of Each Month
Aug: 80.8 mm (3.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 38.1 mm (1.5 in) | 10 January 1905 |
| Feb | 34.5 mm (1.4 in) | 14 February 1980 |
| Mar | 23.9 mm (0.9 in) | 20 March 1994 |
| Apr | 22.9 mm (0.9 in) | 1 April 1905 |
| May | 33.0 mm (1.3 in) | 5 May 1992 |
| Jun | 61.7 mm (2.4 in) | 8 June 1987 |
| Jul | 51.8 mm (2.0 in) | 21 July 1987 |
| Aug | 80.8 mm (3.2 in) | 1 August 2014 |
| Sep | 48.3 mm (1.9 in) | 10 September 1901 |
| Oct | 46.7 mm (1.8 in) | 5 October 1989 |
| Nov | 35.6 mm (1.4 in) | 12 November 1994 |
| Dec | 46.5 mm (1.8 in) | 5 December 1994 |
Period of Record Coverage
1901 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1901 | 225 | 62% | No |
| 1902 | 364 | 100% | Yes |
| 1903 | 333 | 91% | Yes |
| 1904 | 329 | 90% | No |
| 1905 | 357 | 98% | Yes |
| 1906 | 297 | 81% | No |
| 1907 | 61 | 17% | No |
| 1948 | 275 | 75% | No |
| 1949 | 331 | 91% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 362 | 99% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 363 | 99% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 360 | 99% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 363 | 99% | Yes |
| 1967 | 363 | 99% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 350 | 96% | Yes |
| 1972 | 363 | 99% | Yes |
| 1973 | 323 | 88% | No |
| 1974 | 363 | 99% | Yes |
| 1975 | 358 | 98% | Yes |
| 1976 | 356 | 97% | Yes |
| 1977 | 362 | 99% | Yes |
| 1978 | 331 | 91% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 358 | 98% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 363 | 99% | Yes |
| 1983 | 362 | 99% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 364 | 99% | Yes |
| 1989 | 360 | 99% | Yes |
| 1990 | 320 | 88% | No |
| 1991 | 363 | 99% | Yes |
| 1992 | 363 | 99% | Yes |
| 1993 | 360 | 99% | Yes |
| 1994 | 353 | 97% | Yes |
| 1995 | 348 | 95% | Yes |
| 1996 | 348 | 95% | Yes |
| 1997 | 351 | 96% | Yes |
| 1998 | 345 | 95% | Yes |
| 1999 | 344 | 94% | Yes |
| 2000 | 348 | 95% | Yes |
| 2001 | 354 | 97% | Yes |
| 2002 | 354 | 97% | Yes |
| 2003 | 349 | 96% | Yes |
| 2004 | 348 | 95% | Yes |
| 2005 | 345 | 95% | Yes |
| 2006 | 312 | 85% | No |
| 2007 | 332 | 91% | Yes |
| 2008 | 360 | 98% | Yes |
| 2009 | 239 | 65% | No |
| 2010 | 361 | 99% | Yes |
| 2011 | 331 | 91% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 349 | 96% | Yes |
| 2014 | 360 | 99% | Yes |
| 2015 | 360 | 99% | Yes |
| 2016 | 363 | 99% | Yes |
| 2017 | 342 | 94% | Yes |
| 2018 | 363 | 99% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 365 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 364 | 100% | Yes |
| 2024 | 362 | 99% | Yes |
| 2025 | 352 | 96% | Yes |
| 2026 | 247 | 68% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 9 September 2026 | Duncan, US | daily high min (Provisional) | 21.1 C (70.0 F) | 1.7 C (3.1 F) | 61 years | 32 of 100 (Routine) |
| 28 August 2026 | Duncan, US | daily high max (Provisional) | 42.2 C (108.0 F) | 1.1 C (2.0 F) | 5 years | 14 of 100 (Routine) |
| 26 August 2026 | Duncan, US | daily high max (Provisional) | 41.7 C (107.1 F) | 0.6 C (1.1 F) | 7 years | 14 of 100 (Routine) |
| 25 August 2026 | Duncan, US | daily high max (Provisional) | 42.8 C (109.0 F) | 2.8 C (5.0 F) | 24 years | 26 of 100 (Routine) |
| 24 August 2026 | Duncan, US | daily high max (Tie, Provisional) | 40.6 C (105.1 F) | tie | 15 years | 3 of 100 (Routine) |
| 23 August 2026 | Duncan, US | daily high max (Provisional) | 41.1 C (106.0 F) | 0.5 C (0.9 F) | 15 years | 15 of 100 (Routine) |
| 22 August 2026 | Duncan, US | daily high max (Provisional) | 41.1 C (106.0 F) | 1.7 C (3.1 F) | 40 years | 27 of 100 (Routine) |
| 14 August 2026 | Duncan, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 27 years | 4 of 100 (Routine) |
| 11 August 2026 | Duncan, US | daily high min | 25.0 C (77.0 F) | 1.1 C (2.0 F) | 61 years | 32 of 100 (Routine) |
| 1 August 2026 | Duncan, US | daily high min | 26.1 C (79.0 F) | 4.4 C (7.9 F) | 32 years | 35 of 100 (Notable) |
| 31 July 2026 | Duncan, US | daily high min | 24.4 C (75.9 F) | 0.5 C (0.9 F) | 12 years | 14 of 100 (Routine) |
| 31 July 2026 | Duncan, US | daily high max | 43.9 C (111.0 F) | 0.6 C (1.1 F) | 5 years | 12 of 100 (Routine) |
| 30 July 2026 | Duncan, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 16 years | 3 of 100 (Routine) |
| 28 July 2026 | Duncan, US | daily high min | 25.0 C (77.0 F) | 2.8 C (5.0 F) | 17 years | 24 of 100 (Routine) |
| 24 July 2026 | Duncan, US | daily high max | 42.8 C (109.0 F) | 1.7 C (3.1 F) | 52 years | 30 of 100 (Routine) |
| 24 June 2026 | Duncan, US | daily high min | 25.6 C (78.1 F) | 1.2 C (2.2 F) | 16 years | 16 of 100 (Routine) |
| 23 June 2026 | Duncan, US | daily high max (Tie) | 42.8 C (109.0 F) | tie | 36 years | 5 of 100 (Routine) |
| 18 June 2026 | Duncan, US | daily high min | 22.8 C (73.0 F) | 1.1 C (2.0 F) | 67 years | 32 of 100 (Routine) |
| 17 June 2026 | Duncan, US | all-time high min (Tie) | 26.7 C (80.1 F) | tie | 26 years | 9 of 100 (Routine) |
| 14 June 2026 | Duncan, US | daily high min (Tie) | 21.1 C (70.0 F) | tie | 4 years | 2 of 100 (Routine) |
Climate Trend
70 complete years, 1902 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1902 | 14.9 C | -0.92 C |
| 1905 | 15.0 C | -0.78 C |
| 1950 | 15.3 C | -0.52 C |
| 1951 | 15.2 C | -0.60 C |
| 1952 | 14.8 C | -1.00 C |
| 1953 | 14.9 C | -0.91 C |
| 1954 | 16.0 C | +0.23 C |
| 1955 | 14.9 C | -0.85 C |
| 1956 | 14.9 C | -0.89 C |
| 1957 | 15.5 C | -0.29 C |
| 1958 | 15.6 C | -0.21 C |
| 1959 | 15.5 C | -0.29 C |
| 1960 | 14.9 C | -0.83 C |
| 1961 | 15.0 C | -0.81 C |
| 1962 | 15.2 C | -0.55 C |
| 1963 | 15.1 C | -0.63 C |
| 1964 | 14.4 C | -1.39 C |
| 1965 | 15.2 C | -0.57 C |
| 1966 | 14.9 C | -0.83 C |
| 1967 | 15.2 C | -0.62 C |
| 1968 | 14.8 C | -0.94 C |
| 1969 | 15.7 C | -0.11 C |
| 1970 | 14.8 C | -1.00 C |
| 1972 | 15.2 C | -0.58 C |
| 1974 | 15.3 C | -0.45 C |
| 1975 | 14.2 C | -1.58 C |
| 1976 | 14.1 C | -1.69 C |
| 1977 | 15.3 C | -0.47 C |
| 1979 | 14.4 C | -1.41 C |
| 1980 | 15.5 C | -0.23 C |
| 1981 | 16.3 C | +0.49 C |
| 1982 | 15.3 C | -0.46 C |
| 1983 | 15.2 C | -0.57 C |
| 1984 | 15.0 C | -0.78 C |
| 1985 | 15.1 C | -0.63 C |
| 1986 | 16.0 C | +0.18 C |
| 1987 | 14.9 C | -0.87 C |
| 1988 | 15.5 C | -0.29 C |
| 1989 | 16.2 C | +0.45 C |
| 1991 | 15.2 C | -0.58 C |
| 1992 | 15.2 C | -0.58 C |
| 1993 | 15.8 C | +0.02 C |
| 1994 | 16.5 C | +0.70 C |
| 1995 | 16.1 C | +0.36 C |
| 1996 | 16.6 C | +0.87 C |
| 1997 | 16.2 C | +0.41 C |
| 1998 | 15.9 C | +0.10 C |
| 1999 | 16.3 C | +0.57 C |
| 2000 | 17.1 C | +1.36 C |
| 2001 | 16.6 C | +0.84 C |
| 2002 | 16.6 C | +0.81 C |
| 2003 | 17.2 C | +1.41 C |
| 2004 | 16.1 C | +0.37 C |
| 2005 | 16.9 C | +1.08 C |
| 2008 | 16.2 C | +0.40 C |
| 2010 | 16.2 C | +0.46 C |
| 2012 | 17.0 C | +1.27 C |
| 2013 | 16.2 C | +0.38 C |
| 2014 | 16.8 C | +1.07 C |
| 2015 | 16.9 C | +1.09 C |
| 2016 | 16.8 C | +1.07 C |
| 2017 | 17.4 C | +1.62 C |
| 2018 | 17.3 C | +1.49 C |
| 2019 | 16.4 C | +0.58 C |
| 2020 | 17.1 C | +1.35 C |
| 2021 | 16.9 C | +1.13 C |
| 2022 | 16.3 C | +0.55 C |
| 2023 | 16.8 C | +1.01 C |
| 2024 | 17.2 C | +1.43 C |
| 2025 | 17.6 C | +1.86 C |
The annual mean temperature here has risen by 0.3 C (0.2 to 0.3) per decade over 1902 to 2025. In Fahrenheit: 0.5 F (0.4 to 0.6) per decade. The slope is a straight line fitted to 70 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.3 C (0.2 to 0.3) per decade | 0.5 F (0.4 to 0.6) per decade | 1902 to 2025 | 70 | Rise |
| Mean daily maximum | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.4 to 0.7) per decade | 1902 to 2025 | 70 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.5) per decade | 1902 to 2025 | 70 | Rise |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1901 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.0 C (113.0 F) | 2020 | 41.1 C (106.0 F) | 86 |
| Coldest night (TNn) | -18.9 C (-2.0 F) | 1953 | -12.8 C (9.0 F) | 87 |
| Wettest day (Rx1day) | 80.8 mm (3.2 in) | 2014 | 29.0 mm (1.1 in) | 93 |
| Wettest five days (Rx5day) | 99.1 mm (3.9 in) | 2014 | 43.9 mm (1.7 in) | 93 |
| Longest dry spell (CDD) | 135 days | 1971 | 62 days | 93 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1901 | 41.1 C (106.0 F) |
| 1902 | 42.8 C (109.0 F) |
| 1903 | 40.0 C (104.0 F) |
| 1904 | 39.4 C (102.9 F) |
| 1905 | 42.8 C (109.0 F) |
| 1906 | 40.6 C (105.1 F) |
| 1907 | 34.4 C (93.9 F) |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | 40.0 C (104.0 F) |
| 1949 | 38.3 C (100.9 F) |
| 1950 | 40.0 C (104.0 F) |
| 1951 | 38.9 C (102.0 F) |
| 1952 | 38.9 C (102.0 F) |
| 1953 | 40.0 C (104.0 F) |
| 1954 | 39.4 C (102.9 F) |
| 1955 | 40.0 C (104.0 F) |
| 1956 | 39.4 C (102.9 F) |
| 1957 | 40.6 C (105.1 F) |
| 1958 | 39.4 C (102.9 F) |
| 1959 | 37.8 C (100.0 F) |
| 1960 | 39.4 C (102.9 F) |
| 1961 | 37.8 C (100.0 F) |
| 1962 | 40.0 C (104.0 F) |
| 1963 | 39.4 C (102.9 F) |
| 1964 | 39.4 C (102.9 F) |
| 1965 | 38.3 C (100.9 F) |
| 1966 | 38.3 C (100.9 F) |
| 1967 | 38.9 C (102.0 F) |
| 1968 | 40.0 C (104.0 F) |
| 1969 | 40.6 C (105.1 F) |
| 1970 | 40.0 C (104.0 F) |
| 1971 | 41.1 C (106.0 F) |
| 1972 | 39.4 C (102.9 F) |
| 1973 | 42.2 C (108.0 F) |
| 1974 | 42.8 C (109.0 F) |
| 1975 | 38.9 C (102.0 F) |
| 1976 | 39.4 C (102.9 F) |
| 1977 | 40.0 C (104.0 F) |
| 1978 | 41.7 C (107.1 F) |
| 1979 | 42.2 C (108.0 F) |
| 1980 | 42.2 C (108.0 F) |
| 1981 | 42.2 C (108.0 F) |
| 1982 | 41.1 C (106.0 F) |
| 1983 | 40.0 C (104.0 F) |
| 1984 | 39.4 C (102.9 F) |
| 1985 | 41.1 C (106.0 F) |
| 1986 | 41.1 C (106.0 F) |
| 1987 | 39.4 C (102.9 F) |
| 1988 | 41.7 C (107.1 F) |
| 1989 | 43.3 C (109.9 F) |
| 1990 | 43.3 C (109.9 F) |
| 1991 | 39.4 C (102.9 F) |
| 1992 | 40.6 C (105.1 F) |
| 1993 | 40.6 C (105.1 F) |
| 1994 | 43.9 C (111.0 F) |
| 1995 | 42.2 C (108.0 F) |
| 1996 | 41.7 C (107.1 F) |
| 1997 | 42.2 C (108.0 F) |
| 1998 | 42.8 C (109.0 F) |
| 1999 | 41.7 C (107.1 F) |
| 2000 | 42.2 C (108.0 F) |
| 2001 | 41.1 C (106.0 F) |
| 2002 | 42.8 C (109.0 F) |
| 2003 | 43.3 C (109.9 F) |
| 2004 | 41.1 C (106.0 F) |
| 2005 | 42.2 C (108.0 F) |
| 2006 | 41.7 C (107.1 F) |
| 2007 | 42.8 C (109.0 F) |
| 2008 | 41.1 C (106.0 F) |
| 2009 | 41.7 C (107.1 F) |
| 2010 | 42.8 C (109.0 F) |
| 2011 | 43.3 C (109.9 F) |
| 2012 | 42.2 C (108.0 F) |
| 2013 | 42.2 C (108.0 F) |
| 2014 | 41.1 C (106.0 F) |
| 2015 | 42.2 C (108.0 F) |
| 2016 | 43.3 C (109.9 F) |
| 2017 | 43.3 C (109.9 F) |
| 2018 | 42.8 C (109.0 F) |
| 2019 | 41.7 C (107.1 F) |
| 2020 | 45.0 C (113.0 F) |
| 2021 | 43.9 C (111.0 F) |
| 2022 | 42.2 C (108.0 F) |
| 2023 | 43.9 C (111.0 F) |
| 2024 | 42.8 C (109.0 F) |
| 2025 | 43.9 C (111.0 F) |
| 2026 | 43.9 C (111.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1901 | -11.7 C (10.9 F) |
| 1902 | -11.7 C (10.9 F) |
| 1903 | -12.2 C (10.0 F) |
| 1904 | -15.6 C (3.9 F) |
| 1905 | -11.7 C (10.9 F) |
| 1906 | -12.2 C (10.0 F) |
| 1907 | -7.2 C (19.0 F) |
| 1941 | -6.7 C (19.9 F) |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | -13.3 C (8.1 F) |
| 1949 | -16.1 C (3.0 F) |
| 1950 | -13.9 C (7.0 F) |
| 1951 | -13.9 C (7.0 F) |
| 1952 | -12.2 C (10.0 F) |
| 1953 | -18.9 C (-2.0 F) |
| 1954 | -15.0 C (5.0 F) |
| 1955 | -13.9 C (7.0 F) |
| 1956 | -18.3 C (-0.9 F) |
| 1957 | -12.8 C (9.0 F) |
| 1958 | -14.4 C (6.1 F) |
| 1959 | -13.9 C (7.0 F) |
| 1960 | -11.7 C (10.9 F) |
| 1961 | -10.6 C (12.9 F) |
| 1962 | -18.9 C (-2.0 F) |
| 1963 | -12.2 C (10.0 F) |
| 1964 | -17.8 C (0.0 F) |
| 1965 | -10.6 C (12.9 F) |
| 1966 | -15.0 C (5.0 F) |
| 1967 | -17.2 C (1.0 F) |
| 1968 | -13.3 C (8.1 F) |
| 1969 | -11.1 C (12.0 F) |
| 1970 | -15.6 C (3.9 F) |
| 1971 | -12.2 C (10.0 F) |
| 1972 | -11.1 C (12.0 F) |
| 1973 | -15.6 C (3.9 F) |
| 1974 | -15.0 C (5.0 F) |
| 1975 | -13.3 C (8.1 F) |
| 1976 | -14.4 C (6.1 F) |
| 1977 | -12.8 C (9.0 F) |
| 1978 | -17.8 C (0.0 F) |
| 1979 | -15.0 C (5.0 F) |
| 1980 | -12.8 C (9.0 F) |
| 1981 | -13.3 C (8.1 F) |
| 1982 | -11.7 C (10.9 F) |
| 1983 | -10.0 C (14.0 F) |
| 1984 | -11.7 C (10.9 F) |
| 1985 | -13.3 C (8.1 F) |
| 1986 | -12.8 C (9.0 F) |
| 1987 | -12.2 C (10.0 F) |
| 1988 | -16.7 C (1.9 F) |
| 1989 | -15.0 C (5.0 F) |
| 1990 | -17.2 C (1.0 F) |
| 1991 | -10.6 C (12.9 F) |
| 1992 | -13.9 C (7.0 F) |
| 1993 | -12.2 C (10.0 F) |
| 1994 | -13.3 C (8.1 F) |
| 1995 | -8.3 C (17.1 F) |
| 1996 | -12.8 C (9.0 F) |
| 1997 | -10.0 C (14.0 F) |
| 1998 | -10.6 C (12.9 F) |
| 1999 | -12.8 C (9.0 F) |
| 2000 | -12.8 C (9.0 F) |
| 2001 | -10.6 C (12.9 F) |
| 2002 | -13.9 C (7.0 F) |
| 2003 | -15.0 C (5.0 F) |
| 2004 | -11.7 C (10.9 F) |
| 2005 | -13.9 C (7.0 F) |
| 2006 | -12.2 C (10.0 F) |
| 2007 | -15.6 C (3.9 F) |
| 2008 | -13.3 C (8.1 F) |
| 2009 | -9.4 C (15.1 F) |
| 2010 | -13.3 C (8.1 F) |
| 2011 | -18.9 C (-2.0 F) |
| 2012 | -10.6 C (12.9 F) |
| 2013 | -17.2 C (1.0 F) |
| 2014 | -10.6 C (12.9 F) |
| 2015 | -10.6 C (12.9 F) |
| 2016 | -11.1 C (12.0 F) |
| 2017 | -10.0 C (14.0 F) |
| 2018 | -11.7 C (10.9 F) |
| 2019 | -11.1 C (12.0 F) |
| 2020 | -12.8 C (9.0 F) |
| 2021 | -13.3 C (8.1 F) |
| 2022 | -13.3 C (8.1 F) |
| 2023 | -11.7 C (10.9 F) |
| 2024 | -11.7 C (10.9 F) |
| 2025 | -15.6 C (3.9 F) |
| 2026 | -7.2 C (19.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1901 | 48.3 mm (1.9 in) |
| 1902 | 34.3 mm (1.4 in) |
| 1903 | 38.6 mm (1.5 in) |
| 1904 | 27.9 mm (1.1 in) |
| 1905 | 38.1 mm (1.5 in) |
| 1906 | 17.8 mm (0.7 in) |
| 1907 | 3.6 mm (0.14 in) |
| 1941 | 31.2 mm (1.2 in) |
| 1942 | 53.3 mm (2.1 in) |
| 1943 | 38.1 mm (1.5 in) |
| 1944 | 23.6 mm (0.9 in) |
| 1945 | 28.2 mm (1.1 in) |
| 1946 | 13.0 mm (0.5 in) |
| 1947 | 18.3 mm (0.7 in) |
| 1948 | 21.3 mm (0.8 in) |
| 1949 | 29.2 mm (1.1 in) |
| 1950 | 23.9 mm (0.9 in) |
| 1951 | 35.3 mm (1.4 in) |
| 1952 | 42.2 mm (1.7 in) |
| 1953 | 26.4 mm (1.0 in) |
| 1954 | 25.7 mm (1.0 in) |
| 1955 | 33.5 mm (1.3 in) |
| 1956 | 22.9 mm (0.9 in) |
| 1957 | 31.2 mm (1.2 in) |
| 1958 | 24.1 mm (0.9 in) |
| 1959 | 29.2 mm (1.1 in) |
| 1960 | 25.7 mm (1.0 in) |
| 1961 | 25.4 mm (1.0 in) |
| 1962 | 28.7 mm (1.1 in) |
| 1963 | 37.8 mm (1.5 in) |
| 1964 | 22.4 mm (0.9 in) |
| 1965 | 39.9 mm (1.6 in) |
| 1966 | 21.1 mm (0.8 in) |
| 1967 | 49.8 mm (2.0 in) |
| 1968 | 28.2 mm (1.1 in) |
| 1969 | 22.1 mm (0.9 in) |
| 1970 | 36.8 mm (1.4 in) |
| 1971 | 36.1 mm (1.4 in) |
| 1972 | 40.4 mm (1.6 in) |
| 1973 | 26.2 mm (1.0 in) |
| 1974 | 39.9 mm (1.6 in) |
| 1975 | 26.9 mm (1.1 in) |
| 1976 | 27.4 mm (1.1 in) |
| 1977 | 26.7 mm (1.1 in) |
| 1978 | 24.1 mm (0.9 in) |
| 1979 | 28.4 mm (1.1 in) |
| 1980 | 34.5 mm (1.4 in) |
| 1981 | 21.6 mm (0.9 in) |
| 1982 | 24.9 mm (1.0 in) |
| 1983 | 41.1 mm (1.6 in) |
| 1984 | 43.7 mm (1.7 in) |
| 1985 | 41.4 mm (1.6 in) |
| 1986 | 29.0 mm (1.1 in) |
| 1987 | 61.7 mm (2.4 in) |
| 1988 | 34.0 mm (1.3 in) |
| 1989 | 46.7 mm (1.8 in) |
| 1990 | 26.7 mm (1.1 in) |
| 1991 | 33.0 mm (1.3 in) |
| 1992 | 33.0 mm (1.3 in) |
| 1993 | 40.6 mm (1.6 in) |
| 1994 | 46.5 mm (1.8 in) |
| 1995 | 32.0 mm (1.3 in) |
| 1996 | 40.6 mm (1.6 in) |
| 1997 | 45.2 mm (1.8 in) |
| 1998 | 41.9 mm (1.6 in) |
| 1999 | 31.0 mm (1.2 in) |
| 2000 | 44.2 mm (1.7 in) |
| 2001 | 15.7 mm (0.6 in) |
| 2002 | 33.0 mm (1.3 in) |
| 2003 | 21.3 mm (0.8 in) |
| 2004 | 19.6 mm (0.8 in) |
| 2005 | 23.4 mm (0.9 in) |
| 2006 | 20.3 mm (0.8 in) |
| 2007 | 63.5 mm (2.5 in) |
| 2008 | 40.6 mm (1.6 in) |
| 2009 | 21.6 mm (0.9 in) |
| 2010 | 25.7 mm (1.0 in) |
| 2011 | 15.7 mm (0.6 in) |
| 2012 | 11.4 mm (0.4 in) |
| 2013 | 22.1 mm (0.9 in) |
| 2014 | 80.8 mm (3.2 in) |
| 2015 | 33.3 mm (1.3 in) |
| 2016 | 27.7 mm (1.1 in) |
| 2017 | 17.3 mm (0.7 in) |
| 2018 | 48.3 mm (1.9 in) |
| 2019 | 34.8 mm (1.4 in) |
| 2020 | 17.0 mm (0.7 in) |
| 2021 | 21.3 mm (0.8 in) |
| 2022 | 37.1 mm (1.5 in) |
| 2023 | 30.7 mm (1.2 in) |
| 2024 | 15.7 mm (0.6 in) |
| 2025 | 12.4 mm (0.5 in) |
| 2026 | 23.9 mm (0.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1901 | 48.3 mm (1.9 in) |
| 1902 | 36.1 mm (1.4 in) |
| 1903 | 50.0 mm (2.0 in) |
| 1904 | 41.9 mm (1.6 in) |
| 1905 | 50.8 mm (2.0 in) |
| 1906 | 34.6 mm (1.4 in) |
| 1907 | 4.4 mm (0.17 in) |
| 1941 | 57.1 mm (2.2 in) |
| 1942 | 62.4 mm (2.5 in) |
| 1943 | 65.8 mm (2.6 in) |
| 1944 | 35.1 mm (1.4 in) |
| 1945 | 29.5 mm (1.2 in) |
| 1946 | 21.1 mm (0.8 in) |
| 1947 | 33.0 mm (1.3 in) |
| 1948 | 44.1 mm (1.7 in) |
| 1949 | 45.2 mm (1.8 in) |
| 1950 | 27.8 mm (1.1 in) |
| 1951 | 40.1 mm (1.6 in) |
| 1952 | 42.2 mm (1.7 in) |
| 1953 | 48.4 mm (1.9 in) |
| 1954 | 45.7 mm (1.8 in) |
| 1955 | 48.0 mm (1.9 in) |
| 1956 | 28.0 mm (1.1 in) |
| 1957 | 34.8 mm (1.4 in) |
| 1958 | 35.4 mm (1.4 in) |
| 1959 | 50.0 mm (2.0 in) |
| 1960 | 38.4 mm (1.5 in) |
| 1961 | 31.5 mm (1.2 in) |
| 1962 | 37.8 mm (1.5 in) |
| 1963 | 43.9 mm (1.7 in) |
| 1964 | 38.6 mm (1.5 in) |
| 1965 | 44.9 mm (1.8 in) |
| 1966 | 31.3 mm (1.2 in) |
| 1967 | 73.4 mm (2.9 in) |
| 1968 | 36.3 mm (1.4 in) |
| 1969 | 32.1 mm (1.3 in) |
| 1970 | 40.1 mm (1.6 in) |
| 1971 | 44.2 mm (1.7 in) |
| 1972 | 59.0 mm (2.3 in) |
| 1973 | 49.5 mm (1.9 in) |
| 1974 | 51.1 mm (2.0 in) |
| 1975 | 49.3 mm (1.9 in) |
| 1976 | 59.9 mm (2.4 in) |
| 1977 | 59.0 mm (2.3 in) |
| 1978 | 39.7 mm (1.6 in) |
| 1979 | 36.8 mm (1.4 in) |
| 1980 | 46.7 mm (1.8 in) |
| 1981 | 33.3 mm (1.3 in) |
| 1982 | 32.8 mm (1.3 in) |
| 1983 | 82.0 mm (3.2 in) |
| 1984 | 50.9 mm (2.0 in) |
| 1985 | 93.0 mm (3.7 in) |
| 1986 | 44.5 mm (1.8 in) |
| 1987 | 63.7 mm (2.5 in) |
| 1988 | 47.2 mm (1.9 in) |
| 1989 | 56.9 mm (2.2 in) |
| 1990 | 32.8 mm (1.3 in) |
| 1991 | 75.2 mm (3.0 in) |
| 1992 | 49.3 mm (1.9 in) |
| 1993 | 82.0 mm (3.2 in) |
| 1994 | 58.5 mm (2.3 in) |
| 1995 | 41.1 mm (1.6 in) |
| 1996 | 50.8 mm (2.0 in) |
| 1997 | 55.4 mm (2.2 in) |
| 1998 | 74.9 mm (2.9 in) |
| 1999 | 58.9 mm (2.3 in) |
| 2000 | 67.6 mm (2.7 in) |
| 2001 | 37.1 mm (1.5 in) |
| 2002 | 58.9 mm (2.3 in) |
| 2003 | 29.9 mm (1.2 in) |
| 2004 | 30.3 mm (1.2 in) |
| 2005 | 42.5 mm (1.7 in) |
| 2006 | 35.6 mm (1.4 in) |
| 2007 | 52.4 mm (2.1 in) |
| 2008 | 50.3 mm (2.0 in) |
| 2009 | 22.1 mm (0.9 in) |
| 2010 | 41.6 mm (1.6 in) |
| 2011 | 19.5 mm (0.8 in) |
| 2012 | 22.1 mm (0.9 in) |
| 2013 | 36.3 mm (1.4 in) |
| 2014 | 99.1 mm (3.9 in) |
| 2015 | 50.0 mm (2.0 in) |
| 2016 | 41.2 mm (1.6 in) |
| 2017 | 18.1 mm (0.7 in) |
| 2018 | 63.8 mm (2.5 in) |
| 2019 | 59.5 mm (2.3 in) |
| 2020 | 24.6 mm (1.0 in) |
| 2021 | 42.2 mm (1.7 in) |
| 2022 | 59.0 mm (2.3 in) |
| 2023 | 31.2 mm (1.2 in) |
| 2024 | 22.2 mm (0.9 in) |
| 2025 | 15.8 mm (0.6 in) |
| 2026 | 23.9 mm (0.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1901 | 47 days |
| 1902 | 54 days |
| 1903 | 63 days |
| 1904 | 83 days |
| 1905 | 45 days |
| 1906 | 87 days |
| 1907 | 53 days |
| 1941 | 22 days |
| 1942 | 69 days |
| 1943 | 77 days |
| 1944 | 49 days |
| 1945 | 115 days |
| 1946 | 52 days |
| 1947 | 63 days |
| 1948 | 60 days |
| 1949 | 76 days |
| 1950 | 91 days |
| 1951 | 73 days |
| 1952 | 45 days |
| 1953 | 71 days |
| 1954 | 62 days |
| 1955 | 58 days |
| 1956 | 100 days |
| 1957 | 34 days |
| 1958 | 44 days |
| 1959 | 84 days |
| 1960 | 62 days |
| 1961 | 80 days |
| 1962 | 64 days |
| 1963 | 45 days |
| 1964 | 80 days |
| 1965 | 73 days |
| 1966 | 103 days |
| 1967 | 54 days |
| 1968 | 62 days |
| 1969 | 51 days |
| 1970 | 71 days |
| 1971 | 135 days |
| 1972 | 82 days |
| 1973 | 93 days |
| 1974 | 56 days |
| 1975 | 49 days |
| 1976 | 30 days |
| 1977 | 54 days |
| 1978 | 54 days |
| 1979 | 36 days |
| 1980 | 52 days |
| 1981 | 57 days |
| 1982 | 55 days |
| 1983 | 46 days |
| 1984 | 80 days |
| 1985 | 63 days |
| 1986 | 86 days |
| 1987 | 37 days |
| 1988 | 56 days |
| 1989 | 66 days |
| 1990 | 38 days |
| 1991 | 72 days |
| 1992 | 34 days |
| 1993 | 59 days |
| 1994 | 45 days |
| 1995 | 87 days |
| 1996 | 106 days |
| 1997 | 48 days |
| 1998 | 93 days |
| 1999 | 99 days |
| 2000 | 78 days |
| 2001 | 38 days |
| 2002 | 125 days |
| 2003 | 87 days |
| 2004 | 94 days |
| 2005 | 55 days |
| 2006 | 64 days |
| 2007 | 52 days |
| 2008 | 97 days |
| 2009 | 35 days |
| 2010 | 60 days |
| 2011 | 121 days |
| 2012 | 106 days |
| 2013 | 56 days |
| 2014 | 47 days |
| 2015 | 37 days |
| 2016 | 35 days |
| 2017 | 99 days |
| 2018 | 95 days |
| 2019 | 47 days |
| 2020 | 51 days |
| 2021 | 71 days |
| 2022 | 79 days |
| 2023 | 61 days |
| 2024 | 81 days |
| 2025 | 72 days |
| 2026 | 51 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
70 years with a frostAcross 70 years with a frost, the median last spring frost at Duncan falls on 30 April and the median first autumn frost on 24 October, which leaves a median of 176 days between them.
In 1992 to 2025 the median growing season was 182 days. That is 12 days more than in 1902 to 1980.
Fitted over all years, the growing season changes by +2.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1902 to 1980) | Recent period (1992 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 30 April | 2 May | 22 April | 10 days earlier | -1.5 days per decade |
| First autumn frost | 24 October | 22 October | 26 October | 4 days later | +1.0 days per decade |
| Growing days | 176 days | 170 days | 182 days | 12 days more | +2.6 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
85 years, 1902 to 2025A day with at least 30.0 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 63.6 mm (2.5 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 30.0 mm (1.2 in) | |
| 5 years | 39.9 mm (1.6 in) | |
| 10 years | 46.1 mm (1.8 in) | |
| 25 years | 53.5 mm (2.1 in) | |
| 50 years | 58.7 mm (2.3 in) | |
| 100 years | 63.6 mm (2.5 in) | Longer than the 85 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 85 years of values from 1902 to 2025.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 80.8 mm (3.2 in) in 2014; 61.7 mm (2.4 in) in 1987; 53.3 mm (2.1 in) in 1942.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Duncan, at 2000 and 2020. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2000 ran 0.3 C (0.6 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2020 ran 0.3 C (0.6 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2000 | +0.3 | +0.6 | likely | 5 |
| 2020 | -0.3 | -0.6 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2010 to 2025 against 1961 to 1990Over 2010 to 2025, Duncan had a mean temperature of 16.9 C (62.3 F) and 233.5 mm (9.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Desert Nwr (United States, 703 km away), Ysleta (United States, 288 km away) and Samalayuca (Mexico, 296 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Desert Nwr | United States | 703 km (437 mi) | 17.0 C (62.6 F) | 112.9 mm (4.4 in) | 0.72 |
| Ysleta | United States | 288 km (179 mi) | 17.2 C (63.0 F) | 225.4 mm (8.9 in) | 0.79 |
| Samalayuca | Mexico | 296 km (184 mi) | 17.1 C (62.7 F) | 265.3 mm (10.4 in) | 0.81 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).