Des Moines Intl AP Weather Records (USW00014933)
Record envelope, standing records and threshold days for Des Moines Intl AP (USW00014933), Iowa, United States, with 82 years of record.
Key Facts for Des Moines Intl AP
- Des Moines Intl AP (USW00014933) is a weather station in Iowa, United States at 41.53 latitude and -93.65 longitude, 286 m (939 ft) above sea level.
- The station reports from 1945 to 2026, 82 years of record.
- 1,464 records set at Des Moines Intl AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Des Moines Intl AP set a daily record high maximum temperature of 31.1 C (88.0 F) on 11 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Iowa, United States, 41.53 latitude, -93.65 longitude.
- Elevation: 286 m (939 ft).
- Period of record: 1945 to 2026, 82 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
14 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 19.4 C (66.9 F) | -31.1 C (-24.0 F) | 15.6 C (60.1 F) | -24.4 C (-11.9 F) |
| Feb | 25.6 C (78.1 F) | -32.2 C (-26.0 F) | 20.0 C (68.0 F) | -17.2 C (1.0 F) |
| Mar | 32.8 C (91.0 F) | -30.0 C (-22.0 F) | 32.8 C (91.0 F) | -15.0 C (5.0 F) |
| Apr | 33.9 C (93.0 F) | -12.8 C (9.0 F) | 31.1 C (88.0 F) | 0.0 C (32.0 F) |
| May | 37.2 C (99.0 F) | -2.2 C (28.0 F) | 31.1 C (88.0 F) | 2.8 C (37.0 F) |
| Jun | 39.4 C (102.9 F) | 5.0 C (41.0 F) | 33.9 C (93.0 F) | 11.7 C (53.1 F) |
| Jul | 41.1 C (106.0 F) | 8.3 C (46.9 F) | 36.7 C (98.1 F) | 16.1 C (61.0 F) |
| Aug | 42.2 C (108.0 F) | 4.4 C (39.9 F) | 33.3 C (91.9 F) | 13.9 C (57.0 F) |
| Sep | 38.3 C (100.9 F) | -2.2 C (28.0 F) | 35.6 C (96.1 F) | 10.6 C (51.1 F) |
| Oct | 35.0 C (95.0 F) | -10.0 C (14.0 F) | 31.1 C (88.0 F) | 7.2 C (45.0 F) |
| Nov | 27.2 C (81.0 F) | -20.0 C (-4.0 F) | n/a | n/a |
| Dec | 23.3 C (73.9 F) | -30.0 C (-22.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1945 | 7 |
| 1946 | 29 |
| 1947 | 31 |
| 1948 | 14 |
| 1949 | 9 |
| 1950 | 34 |
| 1951 | 34 |
| 1952 | 17 |
| 1953 | 11 |
| 1954 | 20 |
| 1955 | 25 |
| 1956 | 16 |
| 1957 | 15 |
| 1958 | 18 |
| 1959 | 18 |
| 1960 | 16 |
| 1961 | 11 |
| 1962 | 28 |
| 1963 | 27 |
| 1964 | 22 |
| 1965 | 27 |
| 1966 | 27 |
| 1967 | 27 |
| 1968 | 20 |
| 1969 | 9 |
| 1970 | 19 |
| 1971 | 14 |
| 1972 | 34 |
| 1973 | 11 |
| 1974 | 18 |
| 1975 | 22 |
| 1976 | 13 |
| 1977 | 23 |
| 1978 | 10 |
| 1979 | 14 |
| 1980 | 13 |
| 1981 | 21 |
| 1982 | 13 |
| 1983 | 40 |
| 1984 | 20 |
| 1985 | 26 |
| 1986 | 20 |
| 1987 | 15 |
| 1988 | 20 |
| 1989 | 25 |
| 1990 | 21 |
| 1991 | 25 |
| 1992 | 16 |
| 1993 | 11 |
| 1994 | 8 |
| 1995 | 13 |
| 1996 | 18 |
| 1997 | 11 |
| 1998 | 14 |
| 1999 | 16 |
| 2000 | 24 |
| 2001 | 12 |
| 2002 | 13 |
| 2003 | 8 |
| 2004 | 7 |
| 2005 | 16 |
| 2006 | 17 |
| 2007 | 14 |
| 2008 | 9 |
| 2009 | 8 |
| 2010 | 7 |
| 2011 | 18 |
| 2012 | 43 |
| 2013 | 16 |
| 2014 | 16 |
| 2015 | 10 |
| 2016 | 14 |
| 2017 | 20 |
| 2018 | 16 |
| 2019 | 13 |
| 2020 | 11 |
| 2021 | 14 |
| 2022 | 19 |
| 2023 | 18 |
| 2024 | 11 |
| 2025 | 13 |
| 2026 | 21 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1983-08-16 | Record high maximum temperature | Record high maximum temperature 42.2 C (108.0 F) |
| 1983-12-19 | Record low maximum temperature | Record low maximum temperature -23.3 C (-9.9 F) |
| 1983-12-24 | Record low maximum temperature | Record low maximum temperature -24.4 C (-11.9 F) |
| 1996-01-26 | Record daily snowfall | Record daily snowfall 34.8 cm (13.7 in) |
| 1996-01-27 | Record snow depth | Record snow depth 48.3 cm (19.0 in) |
| 1996-02-03 | Record low minimum temperature | Record low minimum temperature -32.2 C (-26.0 F) |
Wettest Day of Each Month
Aug: 157.0 mm (6.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 54.1 mm (2.1 in) | 12 January 1960 |
| Feb | 44.7 mm (1.8 in) | 27 February 1948 |
| Mar | 53.6 mm (2.1 in) | 7 March 1990 |
| Apr | 96.5 mm (3.8 in) | 28 April 1974 |
| May | 97.5 mm (3.8 in) | 19 May 2025 |
| Jun | 115.1 mm (4.5 in) | 9 June 2011 |
| Jul | 90.2 mm (3.6 in) | 31 July 2024 |
| Aug | 157.0 mm (6.2 in) | 27 August 1975 |
| Sep | 112.3 mm (4.4 in) | 12 September 1961 |
| Oct | 91.2 mm (3.6 in) | 1 October 2019 |
| Nov | 80.7 mm (3.2 in) | 3 November 2003 |
| Dec | 45.5 mm (1.8 in) | 13 December 2015 |
Period of Record Coverage
1945 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1945 | 181 | 50% | No |
| 1946 | 362 | 99% | Yes |
| 1947 | 363 | 99% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 365 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 11 October 2026 | Des Moines Intl AP, US | daily high max (Provisional) | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 65 years | 28 of 100 (Routine) |
| 10 October 2026 | Des Moines Intl AP, US | daily high min (Tie, Provisional) | 16.7 C (62.1 F) | tie | 52 years | 5 of 100 (Routine) |
| 9 October 2026 | Des Moines Intl AP, US | daily high max (Tie, Provisional) | 30.0 C (86.0 F) | tie | 16 years | 3 of 100 (Routine) |
| 15 September 2026 | Des Moines Intl AP, US | daily rain (Provisional) | 55.6 mm (2.2 in) | 28.2 mm (1.1 in) | 9 years | 31 of 100 (Routine) |
| 8 September 2026 | Des Moines Intl AP, US | daily rain (Provisional) | 95.8 mm (3.8 in) | 36.6 mm (1.4 in) | 36 years | 47 of 100 (Notable) |
| 5 September 2026 | Des Moines Intl AP, US | daily high min (Provisional) | 23.9 C (75.0 F) | 1.1 C (2.0 F) | 11 years | 13 of 100 (Routine) |
| 3 September 2026 | Des Moines Intl AP, US | monthly high min (Tie, Provisional) | 24.4 C (75.9 F) | tie | 42 years | 7 of 100 (Routine) |
| 2 September 2026 | Des Moines Intl AP, US | daily high min (Provisional) | 23.9 C (75.0 F) | 0.6 C (1.1 F) | 15 years | 13 of 100 (Routine) |
| 1 September 2026 | Des Moines Intl AP, US | daily high min (Tie, Provisional) | 23.9 C (75.0 F) | tie | 15 years | 3 of 100 (Routine) |
| 31 August 2026 | Des Moines Intl AP, US | daily high min (Provisional) | 23.9 C (75.0 F) | 2.2 C (4.0 F) | 80 years | 38 of 100 (Notable) |
| 30 August 2026 | Des Moines Intl AP, US | daily high min (Tie, Provisional) | 24.4 C (75.9 F) | tie | 75 years | 7 of 100 (Routine) |
| 11 August 2026 | Des Moines Intl AP, US | daily high min | 24.4 C (75.9 F) | 0.5 C (0.9 F) | 4 years | 10 of 100 (Routine) |
| 28 July 2026 | Des Moines Intl AP, US | daily high min (Tie) | 25.0 C (77.0 F) | tie | 71 years | 7 of 100 (Routine) |
| 27 July 2026 | Des Moines Intl AP, US | all-time high min (Tie) | 27.2 C (81.0 F) | tie | 60 years | 11 of 100 (Routine) |
| 4 July 2026 | Des Moines Intl AP, US | daily rain | 31.8 mm (1.3 in) | 5.6 mm (0.22 in) | 31 years | 21 of 100 (Routine) |
| 3 July 2026 | Des Moines Intl AP, US | daily rain | 82.8 mm (3.3 in) | 2.0 mm (0.08 in) | 44 years | 22 of 100 (Routine) |
| 1 July 2026 | Des Moines Intl AP, US | daily high min | 26.1 C (79.0 F) | 1.1 C (2.0 F) | 15 years | 15 of 100 (Routine) |
| 30 June 2026 | Des Moines Intl AP, US | daily high min | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 7 years | 11 of 100 (Routine) |
| 18 May 2026 | Des Moines Intl AP, US | daily rain | 35.1 mm (1.4 in) | 10.2 mm (0.4 in) | 25 years | 23 of 100 (Routine) |
| 14 April 2026 | Des Moines Intl AP, US | daily high min | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 20 years | 16 of 100 (Routine) |
Climate Trend
80 complete years, 1946 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1946 | 11.0 C | +0.72 C |
| 1947 | 9.9 C | -0.34 C |
| 1948 | 10.2 C | -0.12 C |
| 1949 | 10.1 C | -0.21 C |
| 1950 | 8.5 C | -1.81 C |
| 1951 | 8.2 C | -2.06 C |
| 1952 | 10.0 C | -0.24 C |
| 1953 | 10.9 C | +0.61 C |
| 1954 | 10.9 C | +0.66 C |
| 1955 | 10.2 C | -0.10 C |
| 1956 | 10.4 C | +0.13 C |
| 1957 | 9.9 C | -0.41 C |
| 1958 | 9.5 C | -0.80 C |
| 1959 | 9.6 C | -0.69 C |
| 1960 | 9.1 C | -1.18 C |
| 1961 | 9.2 C | -1.05 C |
| 1962 | 9.4 C | -0.92 C |
| 1963 | 9.4 C | -0.84 C |
| 1964 | 9.7 C | -0.62 C |
| 1965 | 9.3 C | -0.98 C |
| 1966 | 9.2 C | -1.13 C |
| 1967 | 9.3 C | -0.99 C |
| 1968 | 9.5 C | -0.77 C |
| 1969 | 9.2 C | -1.10 C |
| 1970 | 10.1 C | -0.23 C |
| 1971 | 10.2 C | -0.13 C |
| 1972 | 8.4 C | -1.85 C |
| 1973 | 10.9 C | +0.58 C |
| 1974 | 10.2 C | -0.04 C |
| 1975 | 10.3 C | +0.04 C |
| 1976 | 10.2 C | -0.11 C |
| 1977 | 11.0 C | +0.70 C |
| 1978 | 9.0 C | -1.30 C |
| 1979 | 8.8 C | -1.45 C |
| 1980 | 10.3 C | +0.02 C |
| 1981 | 11.1 C | +0.80 C |
| 1982 | 9.4 C | -0.92 C |
| 1983 | 10.5 C | +0.22 C |
| 1984 | 10.1 C | -0.17 C |
| 1985 | 9.0 C | -1.32 C |
| 1986 | 10.4 C | +0.14 C |
| 1987 | 11.8 C | +1.47 C |
| 1988 | 10.8 C | +0.47 C |
| 1989 | 9.4 C | -0.92 C |
| 1990 | 10.9 C | +0.61 C |
| 1991 | 10.8 C | +0.48 C |
| 1992 | 10.3 C | +0.04 C |
| 1993 | 8.9 C | -1.41 C |
| 1994 | 9.9 C | -0.34 C |
| 1995 | 9.9 C | -0.40 C |
| 1996 | 8.4 C | -1.84 C |
| 1997 | 9.5 C | -0.78 C |
| 1998 | 11.3 C | +1.04 C |
| 1999 | 11.1 C | +0.79 C |
| 2000 | 10.6 C | +0.30 C |
| 2001 | 10.7 C | +0.44 C |
| 2002 | 10.7 C | +0.43 C |
| 2003 | 10.3 C | +0.02 C |
| 2004 | 10.4 C | +0.11 C |
| 2005 | 11.3 C | +1.04 C |
| 2006 | 11.8 C | +1.55 C |
| 2007 | 10.7 C | +0.46 C |
| 2008 | 9.2 C | -1.11 C |
| 2009 | 10.2 C | -0.07 C |
| 2010 | 10.9 C | +0.60 C |
| 2011 | 11.2 C | +0.91 C |
| 2012 | 13.3 C | +3.06 C |
| 2013 | 10.4 C | +0.14 C |
| 2014 | 9.8 C | -0.53 C |
| 2015 | 11.8 C | +1.53 C |
| 2016 | 12.7 C | +2.39 C |
| 2017 | 12.2 C | +1.93 C |
| 2018 | 10.5 C | +0.26 C |
| 2019 | 9.8 C | -0.44 C |
| 2020 | 11.0 C | +0.73 C |
| 2021 | 11.6 C | +1.27 C |
| 2022 | 10.2 C | -0.04 C |
| 2023 | 12.1 C | +1.80 C |
| 2024 | 12.7 C | +2.45 C |
| 2025 | 11.4 C | +1.08 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1946 to 2025. In Fahrenheit: 0.4 F (0.3 to 0.6) per decade. The slope is a straight line fitted to 80 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.3 to 0.6) per decade | 1946 to 2025 | 80 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.5) per decade | 1946 to 2025 | 80 | Rise |
| Mean daily minimum | 0.3 C (0.2 to 0.3) per decade | 0.5 F (0.3 to 0.6) per decade | 1946 to 2025 | 80 | 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
1945 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.2 C (108.0 F) | 1983 | 36.7 C (98.1 F) | 82 |
| Coldest night (TNn) | -32.2 C (-26.0 F) | 1996 | -25.0 C (-13.0 F) | 82 |
| Wettest day (Rx1day) | 157.0 mm (6.2 in) | 1975 | 63.3 mm (2.5 in) | 82 |
| Wettest five days (Rx5day) | 210.1 mm (8.3 in) | 1975 | 98.2 mm (3.9 in) | 82 |
| Longest dry spell (CDD) | 56 days | 2002 | 24 days | 82 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1945 | 38.3 C (100.9 F) |
| 1946 | 35.6 C (96.1 F) |
| 1947 | 38.9 C (102.0 F) |
| 1948 | 38.3 C (100.9 F) |
| 1949 | 36.1 C (97.0 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 35.6 C (96.1 F) |
| 1952 | 37.8 C (100.0 F) |
| 1953 | 37.2 C (99.0 F) |
| 1954 | 39.4 C (102.9 F) |
| 1955 | 40.6 C (105.1 F) |
| 1956 | 39.4 C (102.9 F) |
| 1957 | 38.9 C (102.0 F) |
| 1958 | 35.6 C (96.1 F) |
| 1959 | 36.1 C (97.0 F) |
| 1960 | 36.7 C (98.1 F) |
| 1961 | 36.1 C (97.0 F) |
| 1962 | 35.6 C (96.1 F) |
| 1963 | 36.1 C (97.0 F) |
| 1964 | 37.8 C (100.0 F) |
| 1965 | 37.2 C (99.0 F) |
| 1966 | 37.8 C (100.0 F) |
| 1967 | 36.7 C (98.1 F) |
| 1968 | 35.6 C (96.1 F) |
| 1969 | 35.0 C (95.0 F) |
| 1970 | 37.2 C (99.0 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 36.7 C (98.1 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 40.0 C (104.0 F) |
| 1975 | 37.2 C (99.0 F) |
| 1976 | 36.1 C (97.0 F) |
| 1977 | 39.4 C (102.9 F) |
| 1978 | 36.1 C (97.0 F) |
| 1979 | 36.1 C (97.0 F) |
| 1980 | 38.9 C (102.0 F) |
| 1981 | 36.1 C (97.0 F) |
| 1982 | 36.7 C (98.1 F) |
| 1983 | 42.2 C (108.0 F) |
| 1984 | 37.8 C (100.0 F) |
| 1985 | 38.3 C (100.9 F) |
| 1986 | 34.4 C (93.9 F) |
| 1987 | 38.3 C (100.9 F) |
| 1988 | 40.0 C (104.0 F) |
| 1989 | 37.2 C (99.0 F) |
| 1990 | 36.1 C (97.0 F) |
| 1991 | 35.6 C (96.1 F) |
| 1992 | 33.3 C (91.9 F) |
| 1993 | 33.3 C (91.9 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 38.3 C (100.9 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 35.6 C (96.1 F) |
| 1998 | 36.7 C (98.1 F) |
| 1999 | 37.8 C (100.0 F) |
| 2000 | 36.7 C (98.1 F) |
| 2001 | 37.2 C (99.0 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 38.3 C (100.9 F) |
| 2004 | 32.8 C (91.0 F) |
| 2005 | 36.7 C (98.1 F) |
| 2006 | 37.8 C (100.0 F) |
| 2007 | 35.6 C (96.1 F) |
| 2008 | 35.0 C (95.0 F) |
| 2009 | 36.1 C (97.0 F) |
| 2010 | 36.1 C (97.0 F) |
| 2011 | 37.2 C (99.0 F) |
| 2012 | 41.1 C (106.0 F) |
| 2013 | 40.0 C (104.0 F) |
| 2014 | 33.9 C (93.0 F) |
| 2015 | 36.1 C (97.0 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 38.3 C (100.9 F) |
| 2018 | 37.2 C (99.0 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 35.6 C (96.1 F) |
| 2021 | 38.3 C (100.9 F) |
| 2022 | 37.2 C (99.0 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 37.2 C (99.0 F) |
| 2025 | 36.1 C (97.0 F) |
| 2026 | 36.7 C (98.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1945 | -23.3 C (-9.9 F) |
| 1946 | -22.8 C (-9.0 F) |
| 1947 | -26.1 C (-15.0 F) |
| 1948 | -24.4 C (-11.9 F) |
| 1949 | -25.0 C (-13.0 F) |
| 1950 | -23.9 C (-11.0 F) |
| 1951 | -26.1 C (-15.0 F) |
| 1952 | -24.4 C (-11.9 F) |
| 1953 | -22.2 C (-8.0 F) |
| 1954 | -25.6 C (-14.1 F) |
| 1955 | -25.0 C (-13.0 F) |
| 1956 | -25.6 C (-14.1 F) |
| 1957 | -27.8 C (-18.0 F) |
| 1958 | -28.9 C (-20.0 F) |
| 1959 | -25.6 C (-14.1 F) |
| 1960 | -26.1 C (-15.0 F) |
| 1961 | -25.6 C (-14.1 F) |
| 1962 | -30.0 C (-22.0 F) |
| 1963 | -30.0 C (-22.0 F) |
| 1964 | -22.8 C (-9.0 F) |
| 1965 | -27.2 C (-17.0 F) |
| 1966 | -30.6 C (-23.1 F) |
| 1967 | -25.0 C (-13.0 F) |
| 1968 | -26.1 C (-15.0 F) |
| 1969 | -24.4 C (-11.9 F) |
| 1970 | -31.1 C (-24.0 F) |
| 1971 | -27.2 C (-17.0 F) |
| 1972 | -27.8 C (-18.0 F) |
| 1973 | -23.3 C (-9.9 F) |
| 1974 | -30.6 C (-23.1 F) |
| 1975 | -25.6 C (-14.1 F) |
| 1976 | -24.4 C (-11.9 F) |
| 1977 | -27.8 C (-18.0 F) |
| 1978 | -24.4 C (-11.9 F) |
| 1979 | -28.3 C (-18.9 F) |
| 1980 | -22.8 C (-9.0 F) |
| 1981 | -27.8 C (-18.0 F) |
| 1982 | -30.0 C (-22.0 F) |
| 1983 | -28.3 C (-18.9 F) |
| 1984 | -26.7 C (-16.1 F) |
| 1985 | -28.9 C (-20.0 F) |
| 1986 | -23.3 C (-9.9 F) |
| 1987 | -23.3 C (-9.9 F) |
| 1988 | -26.7 C (-16.1 F) |
| 1989 | -30.0 C (-22.0 F) |
| 1990 | -23.9 C (-11.0 F) |
| 1991 | -22.8 C (-9.0 F) |
| 1992 | -21.7 C (-7.1 F) |
| 1993 | -21.1 C (-6.0 F) |
| 1994 | -27.8 C (-18.0 F) |
| 1995 | -21.1 C (-6.0 F) |
| 1996 | -32.2 C (-26.0 F) |
| 1997 | -25.0 C (-13.0 F) |
| 1998 | -23.3 C (-9.9 F) |
| 1999 | -25.6 C (-14.1 F) |
| 2000 | -24.4 C (-11.9 F) |
| 2001 | -22.8 C (-9.0 F) |
| 2002 | -19.4 C (-2.9 F) |
| 2003 | -22.2 C (-8.0 F) |
| 2004 | -22.2 C (-8.0 F) |
| 2005 | -22.2 C (-8.0 F) |
| 2006 | -21.7 C (-7.1 F) |
| 2007 | -22.8 C (-9.0 F) |
| 2008 | -24.4 C (-11.9 F) |
| 2009 | -28.3 C (-18.9 F) |
| 2010 | -27.2 C (-17.0 F) |
| 2011 | -22.8 C (-9.0 F) |
| 2012 | -17.2 C (1.0 F) |
| 2013 | -25.5 C (-13.9 F) |
| 2014 | -24.3 C (-11.7 F) |
| 2015 | -23.2 C (-9.8 F) |
| 2016 | -24.3 C (-11.7 F) |
| 2017 | -26.0 C (-14.8 F) |
| 2018 | -28.2 C (-18.8 F) |
| 2019 | -28.8 C (-19.8 F) |
| 2020 | -23.2 C (-9.8 F) |
| 2021 | -27.1 C (-16.8 F) |
| 2022 | -23.8 C (-10.8 F) |
| 2023 | -19.9 C (-3.8 F) |
| 2024 | -27.1 C (-16.8 F) |
| 2025 | -24.9 C (-12.8 F) |
| 2026 | -24.4 C (-11.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1945 | 82.6 mm (3.3 in) |
| 1946 | 74.2 mm (2.9 in) |
| 1947 | 90.2 mm (3.6 in) |
| 1948 | 62.7 mm (2.5 in) |
| 1949 | 31.5 mm (1.2 in) |
| 1950 | 51.1 mm (2.0 in) |
| 1951 | 46.5 mm (1.8 in) |
| 1952 | 51.1 mm (2.0 in) |
| 1953 | 47.5 mm (1.9 in) |
| 1954 | 70.1 mm (2.8 in) |
| 1955 | 38.9 mm (1.5 in) |
| 1956 | 29.2 mm (1.1 in) |
| 1957 | 31.2 mm (1.2 in) |
| 1958 | 74.2 mm (2.9 in) |
| 1959 | 78.7 mm (3.1 in) |
| 1960 | 61.0 mm (2.4 in) |
| 1961 | 112.3 mm (4.4 in) |
| 1962 | 66.0 mm (2.6 in) |
| 1963 | 56.1 mm (2.2 in) |
| 1964 | 48.5 mm (1.9 in) |
| 1965 | 47.8 mm (1.9 in) |
| 1966 | 38.4 mm (1.5 in) |
| 1967 | 55.4 mm (2.2 in) |
| 1968 | 45.2 mm (1.8 in) |
| 1969 | 51.3 mm (2.0 in) |
| 1970 | 63.8 mm (2.5 in) |
| 1971 | 52.1 mm (2.1 in) |
| 1972 | 66.3 mm (2.6 in) |
| 1973 | 77.7 mm (3.1 in) |
| 1974 | 96.5 mm (3.8 in) |
| 1975 | 157.0 mm (6.2 in) |
| 1976 | 65.5 mm (2.6 in) |
| 1977 | 106.2 mm (4.2 in) |
| 1978 | 56.9 mm (2.2 in) |
| 1979 | 57.2 mm (2.3 in) |
| 1980 | 51.8 mm (2.0 in) |
| 1981 | 80.8 mm (3.2 in) |
| 1982 | 53.6 mm (2.1 in) |
| 1983 | 45.2 mm (1.8 in) |
| 1984 | 69.3 mm (2.7 in) |
| 1985 | 39.4 mm (1.6 in) |
| 1986 | 84.3 mm (3.3 in) |
| 1987 | 87.6 mm (3.4 in) |
| 1988 | 58.7 mm (2.3 in) |
| 1989 | 59.2 mm (2.3 in) |
| 1990 | 107.4 mm (4.2 in) |
| 1991 | 64.8 mm (2.6 in) |
| 1992 | 55.1 mm (2.2 in) |
| 1993 | 83.6 mm (3.3 in) |
| 1994 | 50.3 mm (2.0 in) |
| 1995 | 47.2 mm (1.9 in) |
| 1996 | 82.0 mm (3.2 in) |
| 1997 | 49.8 mm (2.0 in) |
| 1998 | 62.2 mm (2.4 in) |
| 1999 | 42.4 mm (1.7 in) |
| 2000 | 60.5 mm (2.4 in) |
| 2001 | 65.3 mm (2.6 in) |
| 2002 | 65.5 mm (2.6 in) |
| 2003 | 80.7 mm (3.2 in) |
| 2004 | 64.5 mm (2.5 in) |
| 2005 | 57.7 mm (2.3 in) |
| 2006 | 40.9 mm (1.6 in) |
| 2007 | 53.3 mm (2.1 in) |
| 2008 | 105.4 mm (4.1 in) |
| 2009 | 68.1 mm (2.7 in) |
| 2010 | 61.5 mm (2.4 in) |
| 2011 | 115.1 mm (4.5 in) |
| 2012 | 87.1 mm (3.4 in) |
| 2013 | 79.8 mm (3.1 in) |
| 2014 | 85.9 mm (3.4 in) |
| 2015 | 64.8 mm (2.6 in) |
| 2016 | 89.7 mm (3.5 in) |
| 2017 | 41.9 mm (1.6 in) |
| 2018 | 67.8 mm (2.7 in) |
| 2019 | 91.2 mm (3.6 in) |
| 2020 | 52.8 mm (2.1 in) |
| 2021 | 73.9 mm (2.9 in) |
| 2022 | 41.9 mm (1.6 in) |
| 2023 | 53.1 mm (2.1 in) |
| 2024 | 90.2 mm (3.6 in) |
| 2025 | 97.5 mm (3.8 in) |
| 2026 | 95.8 mm (3.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1945 | 120.9 mm (4.8 in) |
| 1946 | 108.2 mm (4.3 in) |
| 1947 | 98.3 mm (3.9 in) |
| 1948 | 74.6 mm (2.9 in) |
| 1949 | 65.1 mm (2.6 in) |
| 1950 | 75.5 mm (3.0 in) |
| 1951 | 72.2 mm (2.8 in) |
| 1952 | 87.6 mm (3.4 in) |
| 1953 | 53.1 mm (2.1 in) |
| 1954 | 123.4 mm (4.9 in) |
| 1955 | 60.3 mm (2.4 in) |
| 1956 | 40.6 mm (1.6 in) |
| 1957 | 81.3 mm (3.2 in) |
| 1958 | 157.6 mm (6.2 in) |
| 1959 | 141.9 mm (5.6 in) |
| 1960 | 97.6 mm (3.8 in) |
| 1961 | 127.6 mm (5.0 in) |
| 1962 | 82.6 mm (3.3 in) |
| 1963 | 84.5 mm (3.3 in) |
| 1964 | 86.5 mm (3.4 in) |
| 1965 | 75.9 mm (3.0 in) |
| 1966 | 60.5 mm (2.4 in) |
| 1967 | 104.4 mm (4.1 in) |
| 1968 | 70.1 mm (2.8 in) |
| 1969 | 87.1 mm (3.4 in) |
| 1970 | 98.5 mm (3.9 in) |
| 1971 | 85.6 mm (3.4 in) |
| 1972 | 126.5 mm (5.0 in) |
| 1973 | 153.5 mm (6.0 in) |
| 1974 | 98.1 mm (3.9 in) |
| 1975 | 210.1 mm (8.3 in) |
| 1976 | 107.3 mm (4.2 in) |
| 1977 | 207.6 mm (8.2 in) |
| 1978 | 99.0 mm (3.9 in) |
| 1979 | 76.7 mm (3.0 in) |
| 1980 | 74.7 mm (2.9 in) |
| 1981 | 94.5 mm (3.7 in) |
| 1982 | 77.5 mm (3.1 in) |
| 1983 | 77.4 mm (3.0 in) |
| 1984 | 101.8 mm (4.0 in) |
| 1985 | 75.6 mm (3.0 in) |
| 1986 | 92.9 mm (3.7 in) |
| 1987 | 119.1 mm (4.7 in) |
| 1988 | 65.5 mm (2.6 in) |
| 1989 | 127.8 mm (5.0 in) |
| 1990 | 153.4 mm (6.0 in) |
| 1991 | 97.3 mm (3.8 in) |
| 1992 | 83.0 mm (3.3 in) |
| 1993 | 133.2 mm (5.2 in) |
| 1994 | 54.0 mm (2.1 in) |
| 1995 | 96.4 mm (3.8 in) |
| 1996 | 127.7 mm (5.0 in) |
| 1997 | 68.3 mm (2.7 in) |
| 1998 | 144.2 mm (5.7 in) |
| 1999 | 59.7 mm (2.4 in) |
| 2000 | 86.9 mm (3.4 in) |
| 2001 | 98.3 mm (3.9 in) |
| 2002 | 99.4 mm (3.9 in) |
| 2003 | 112.6 mm (4.4 in) |
| 2004 | 79.6 mm (3.1 in) |
| 2005 | 115.3 mm (4.5 in) |
| 2006 | 59.5 mm (2.3 in) |
| 2007 | 87.9 mm (3.5 in) |
| 2008 | 186.4 mm (7.3 in) |
| 2009 | 113.1 mm (4.5 in) |
| 2010 | 165.2 mm (6.5 in) |
| 2011 | 153.0 mm (6.0 in) |
| 2012 | 112.3 mm (4.4 in) |
| 2013 | 102.2 mm (4.0 in) |
| 2014 | 145.6 mm (5.7 in) |
| 2015 | 128.3 mm (5.1 in) |
| 2016 | 103.0 mm (4.1 in) |
| 2017 | 65.3 mm (2.6 in) |
| 2018 | 131.4 mm (5.2 in) |
| 2019 | 134.1 mm (5.3 in) |
| 2020 | 90.7 mm (3.6 in) |
| 2021 | 111.0 mm (4.4 in) |
| 2022 | 64.3 mm (2.5 in) |
| 2023 | 53.1 mm (2.1 in) |
| 2024 | 131.0 mm (5.2 in) |
| 2025 | 125.4 mm (4.9 in) |
| 2026 | 187.7 mm (7.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1945 | 24 days |
| 1946 | 26 days |
| 1947 | 29 days |
| 1948 | 36 days |
| 1949 | 23 days |
| 1950 | 30 days |
| 1951 | 17 days |
| 1952 | 55 days |
| 1953 | 36 days |
| 1954 | 49 days |
| 1955 | 27 days |
| 1956 | 23 days |
| 1957 | 42 days |
| 1958 | 29 days |
| 1959 | 20 days |
| 1960 | 18 days |
| 1961 | 17 days |
| 1962 | 17 days |
| 1963 | 28 days |
| 1964 | 24 days |
| 1965 | 20 days |
| 1966 | 32 days |
| 1967 | 45 days |
| 1968 | 29 days |
| 1969 | 35 days |
| 1970 | 22 days |
| 1971 | 30 days |
| 1972 | 22 days |
| 1973 | 21 days |
| 1974 | 25 days |
| 1975 | 44 days |
| 1976 | 35 days |
| 1977 | 26 days |
| 1978 | 18 days |
| 1979 | 15 days |
| 1980 | 28 days |
| 1981 | 30 days |
| 1982 | 17 days |
| 1983 | 22 days |
| 1984 | 15 days |
| 1985 | 20 days |
| 1986 | 30 days |
| 1987 | 36 days |
| 1988 | 30 days |
| 1989 | 25 days |
| 1990 | 18 days |
| 1991 | 20 days |
| 1992 | 22 days |
| 1993 | 24 days |
| 1994 | 22 days |
| 1995 | 22 days |
| 1996 | 14 days |
| 1997 | 17 days |
| 1998 | 23 days |
| 1999 | 49 days |
| 2000 | 18 days |
| 2001 | 14 days |
| 2002 | 56 days |
| 2003 | 20 days |
| 2004 | 23 days |
| 2005 | 31 days |
| 2006 | 21 days |
| 2007 | 30 days |
| 2008 | 14 days |
| 2009 | 24 days |
| 2010 | 27 days |
| 2011 | 21 days |
| 2012 | 24 days |
| 2013 | 19 days |
| 2014 | 18 days |
| 2015 | 26 days |
| 2016 | 20 days |
| 2017 | 35 days |
| 2018 | 23 days |
| 2019 | 13 days |
| 2020 | 20 days |
| 2021 | 33 days |
| 2022 | 25 days |
| 2023 | 29 days |
| 2024 | 25 days |
| 2025 | 28 days |
| 2026 | 40 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
80 years with a frostAcross 80 years with a frost, the median last spring frost at Des Moines Intl AP falls on 21 April and the median first autumn frost on 14 October, which leaves a median of 177 days between them.
In 1996 to 2025 the median growing season was 182 days. That is 12 days more than in 1946 to 1975.
Fitted over all years, the growing season changes by +2.7 days per decade at this station.
| Measure | Median, all years | Earliest period (1946 to 1975) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 21 April | 26 April | 17 April | 9 days earlier | -1.5 days per decade |
| First autumn frost | 14 October | 13 October | 20 October | 7 days later | +1.2 days per decade |
| Growing days | 177 days | 170 days | 182 days | 12 days more | +2.7 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
80 years, 1946 to 2025A day with at least 62.2 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 137.9 mm (5.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 62.2 mm (2.4 in) | |
| 5 years | 82.0 mm (3.2 in) | |
| 10 years | 95.3 mm (3.8 in) | |
| 25 years | 112.3 mm (4.4 in) | |
| 50 years | 125.1 mm (4.9 in) | |
| 100 years | 137.9 mm (5.4 in) | Longer than the 80 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, 80 years of values from 1946 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: 157.0 mm (6.2 in) in 1975; 115.1 mm (4.5 in) in 2011; 112.3 mm (4.4 in) in 1961.
Station Changes
3 suspected3 changes were suspected in the annual mean temperature of Des Moines Intl AP, at 1969, 1985 and 2009. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1969 ran 0.5 C (0.9 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1985 ran 0.3 C (0.6 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2009 ran 0.5 C (0.8 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1969 | +0.5 | +0.9 | likely | 5 |
| 1985 | -0.3 | -0.6 | likely | 5 |
| 2009 | +0.5 | +0.8 | 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
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Des Moines Intl AP had a mean temperature of 11.4 C (52.5 F) and 895.9 mm (35.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Havana (United States, 331 km away), Springfield Abraham Lincoln Ca (United States, 384 km away) and Mason City 4SE (United States, 369 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Havana | United States | 331 km (206 mi) | 11.3 C (52.3 F) | 939.8 mm (37.0 in) | 0.69 |
| Springfield Abraham Lincoln Ca | United States | 384 km (239 mi) | 11.4 C (52.5 F) | 896.4 mm (35.3 in) | 0.70 |
| Mason City 4SE | United States | 369 km (229 mi) | 11.2 C (52.1 F) | 895.0 mm (35.2 in) | 0.74 |
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).