Sioux City AP Weather Records (USW00014943)
Record envelope, standing records and threshold days for Sioux City AP (USW00014943), Iowa, United States, with 87 years of record.
Key Facts for Sioux City AP
- Sioux City AP (USW00014943) is a weather station in Iowa, United States at 42.39 latitude and -96.38 longitude, 333 m (1,092 ft) above sea level.
- The station reports from 1940 to 2026, 87 years of record.
- 1,464 records set at Sioux City AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Sioux City AP tied a daily record high maximum temperature of 32.8 C (91.0 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, 42.39 latitude, -96.38 longitude.
- Elevation: 333 m (1,092 ft).
- Period of record: 1940 to 2026, 87 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
15 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 21.7 C (71.1 F) | -33.2 C (-27.8 F) | 17.2 C (63.0 F) | -25.0 C (-13.0 F) |
| Feb | 25.0 C (77.0 F) | -33.2 C (-27.8 F) | 23.9 C (75.0 F) | -19.4 C (-2.9 F) |
| Mar | 35.0 C (95.0 F) | -30.0 C (-22.0 F) | 35.0 C (95.0 F) | -15.0 C (5.0 F) |
| Apr | 36.1 C (97.0 F) | -18.9 C (-2.0 F) | 31.7 C (89.1 F) | -3.3 C (26.1 F) |
| May | 41.1 C (106.0 F) | -3.9 C (25.0 F) | 35.0 C (95.0 F) | -2.8 C (27.0 F) |
| Jun | 42.2 C (108.0 F) | 3.3 C (37.9 F) | 36.1 C (97.0 F) | 6.1 C (43.0 F) |
| Jul | 42.2 C (108.0 F) | 5.6 C (42.1 F) | 38.3 C (100.9 F) | 13.9 C (57.0 F) |
| Aug | 40.0 C (104.0 F) | 2.8 C (37.0 F) | 34.4 C (93.9 F) | 10.0 C (50.0 F) |
| Sep | 39.4 C (102.9 F) | -4.4 C (24.1 F) | 35.6 C (96.1 F) | 10.0 C (50.0 F) |
| Oct | 34.4 C (93.9 F) | -13.2 C (8.2 F) | 33.9 C (93.0 F) | 4.4 C (39.9 F) |
| Nov | 27.8 C (82.0 F) | -22.8 C (-9.0 F) | n/a | n/a |
| Dec | 21.1 C (70.0 F) | -31.1 C (-24.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1940 | 17 |
| 1941 | 19 |
| 1942 | 23 |
| 1943 | 17 |
| 1944 | 18 |
| 1945 | 24 |
| 1946 | 17 |
| 1947 | 30 |
| 1948 | 24 |
| 1949 | 9 |
| 1950 | 21 |
| 1951 | 16 |
| 1952 | 16 |
| 1953 | 13 |
| 1954 | 17 |
| 1955 | 34 |
| 1956 | 7 |
| 1957 | 14 |
| 1958 | 14 |
| 1959 | 16 |
| 1960 | 15 |
| 1961 | 10 |
| 1962 | 34 |
| 1963 | 15 |
| 1964 | 14 |
| 1965 | 23 |
| 1966 | 21 |
| 1967 | 16 |
| 1968 | 17 |
| 1969 | 19 |
| 1970 | 19 |
| 1971 | 8 |
| 1972 | 15 |
| 1973 | 8 |
| 1974 | 18 |
| 1975 | 13 |
| 1976 | 16 |
| 1977 | 13 |
| 1978 | 19 |
| 1979 | 21 |
| 1980 | 14 |
| 1981 | 15 |
| 1982 | 14 |
| 1983 | 31 |
| 1984 | 9 |
| 1985 | 19 |
| 1986 | 7 |
| 1987 | 17 |
| 1988 | 20 |
| 1989 | 26 |
| 1990 | 14 |
| 1991 | 23 |
| 1992 | 14 |
| 1993 | 8 |
| 1994 | 12 |
| 1995 | 19 |
| 1996 | 18 |
| 1997 | 22 |
| 1998 | 17 |
| 1999 | 15 |
| 2000 | 24 |
| 2001 | 10 |
| 2002 | 17 |
| 2003 | 7 |
| 2004 | 20 |
| 2005 | 26 |
| 2006 | 16 |
| 2007 | 11 |
| 2008 | 5 |
| 2009 | 13 |
| 2010 | 8 |
| 2011 | 9 |
| 2012 | 36 |
| 2013 | 13 |
| 2014 | 17 |
| 2015 | 12 |
| 2016 | 13 |
| 2017 | 21 |
| 2018 | 15 |
| 2019 | 7 |
| 2020 | 22 |
| 2021 | 21 |
| 2022 | 16 |
| 2023 | 21 |
| 2024 | 15 |
| 2025 | 21 |
| 2026 | 14 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1972-07-17 | Record daily precipitation | Record daily precipitation 139.7 mm (5.5 in) |
| 1982-01-22 | Record daily snowfall | Record daily snowfall 44.2 cm (17.4 in) |
| 1983-12-23 | 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 -23.9 C (-11.0 F) |
| 1988-06-21 | Record high maximum temperature | Record high maximum temperature 42.2 C (108.0 F) |
| 1989-12-21 | Record low maximum temperature | Record low maximum temperature -25.0 C (-13.0 F) |
| 2004-03-15 | Record daily snowfall | Record daily snowfall 46.7 cm (18.4 in) |
| 2018-01-02 | Record low minimum temperature | Record low minimum temperature -33.2 C (-27.8 F) |
| 2025-06-21 | Record high minimum temperature | Record high minimum temperature 27.2 C (81.0 F) |
Wettest Day of Each Month
Jul: 139.7 mm (5.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 32.0 mm (1.3 in) | 22 January 2018 |
| Feb | 54.6 mm (2.1 in) | 18 February 1971 |
| Mar | 57.2 mm (2.3 in) | 31 March 2007 |
| Apr | 63.2 mm (2.5 in) | 14 April 2012 |
| May | 71.4 mm (2.8 in) | 25 May 2011 |
| Jun | 129.5 mm (5.1 in) | 3 June 1940 |
| Jul | 139.7 mm (5.5 in) | 17 July 1972 |
| Aug | 108.7 mm (4.3 in) | 21 August 1961 |
| Sep | 78.0 mm (3.1 in) | 3 September 2009 |
| Oct | 112.3 mm (4.4 in) | 30 October 1979 |
| Nov | 82.0 mm (3.2 in) | 19 November 1948 |
| Dec | 35.1 mm (1.4 in) | 28 December 2019 |
Period of Record Coverage
1940 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1940 | 275 | 75% | No |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | 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 | 366 | 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 | 285 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 11 October 2026 | Sioux City AP, US | daily high max (Tie, Provisional) | 32.8 C (91.0 F) | tie | 11 years | 2 of 100 (Routine) |
| 10 October 2026 | Sioux City AP, US | daily high min (Provisional) | 18.3 C (64.9 F) | 3.9 C (7.0 F) | 64 years | 34 of 100 (Routine) |
| 10 October 2026 | Sioux City AP, US | daily high max (Provisional) | 33.9 C (93.0 F) | 3.3 C (5.9 F) | 64 years | 31 of 100 (Routine) |
| 18 September 2026 | Sioux City AP, US | daily high max (Provisional) | 35.6 C (96.1 F) | 0.6 C (1.1 F) | 79 years | 32 of 100 (Routine) |
| 5 September 2026 | Sioux City AP, US | daily high min (Tie, Provisional) | 22.8 C (73.0 F) | tie | 11 years | 2 of 100 (Routine) |
| 3 September 2026 | Sioux City AP, US | daily high min (Tie, Provisional) | 21.1 C (70.0 F) | tie | 65 years | 6 of 100 (Routine) |
| 14 August 2026 | Sioux City AP, US | daily high min | 21.7 C (71.1 F) | 0.6 C (1.1 F) | 53 years | 25 of 100 (Routine) |
| 11 August 2026 | Sioux City AP, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 79 years | 7 of 100 (Routine) |
| 8 August 2026 | Sioux City AP, US | daily low min (Tie) | 10.0 C (50.0 F) | tie | 36 years | 4 of 100 (Routine) |
| 27 July 2026 | Sioux City AP, US | daily high min | 25.0 C (77.0 F) | 1.1 C (2.0 F) | 16 years | 15 of 100 (Routine) |
| 31 May 2026 | Sioux City AP, US | daily high min | 19.4 C (66.9 F) | 0.5 C (0.9 F) | 12 years | 12 of 100 (Routine) |
| 2 May 2026 | Sioux City AP, US | daily low min | -2.8 C (27.0 F) | 0.6 C (1.1 F) | 59 years | 26 of 100 (Routine) |
| 2 April 2026 | Sioux City AP, US | daily rain | 45.7 mm (1.8 in) | 21.3 mm (0.8 in) | 37 years | 42 of 100 (Notable) |
| 25 March 2026 | Sioux City AP, US | daily high max | 26.7 C (80.1 F) | 2.8 C (5.0 F) | 35 years | 21 of 100 (Routine) |
| 21 March 2026 | Sioux City AP, US | monthly high max | 35.0 C (95.0 F) | 2.2 C (4.0 F) | 57 years | 37 of 100 (Notable) |
| 20 March 2026 | Sioux City AP, US | daily high max | 28.3 C (82.9 F) | 2.2 C (4.0 F) | 11 years | 13 of 100 (Routine) |
| 19 March 2026 | Sioux City AP, US | daily high max (Tie) | 26.1 C (79.0 F) | tie | 8 years | 2 of 100 (Routine) |
| 8 March 2026 | Sioux City AP, US | daily high max | 23.3 C (73.9 F) | 1.6 C (2.9 F) | 5 years | 10 of 100 (Routine) |
| 17 February 2026 | Sioux City AP, US | daily high min | 2.8 C (37.0 F) | 1.1 C (2.0 F) | 44 years | 22 of 100 (Routine) |
| 15 February 2026 | Sioux City AP, US | daily high max | 20.0 C (68.0 F) | 5.6 C (10.1 F) | 12 years | 18 of 100 (Routine) |
Climate Trend
85 complete years, 1941 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1941 | 10.1 C | +0.85 C |
| 1942 | 9.1 C | -0.19 C |
| 1943 | 8.7 C | -0.55 C |
| 1944 | 9.2 C | -0.14 C |
| 1945 | 8.4 C | -0.88 C |
| 1946 | 9.9 C | +0.64 C |
| 1947 | 9.0 C | -0.28 C |
| 1948 | 9.2 C | -0.06 C |
| 1949 | 9.1 C | -0.18 C |
| 1950 | 7.3 C | -1.95 C |
| 1951 | 7.3 C | -1.95 C |
| 1952 | 9.2 C | -0.13 C |
| 1953 | 10.0 C | +0.66 C |
| 1954 | 10.2 C | +0.95 C |
| 1955 | 9.7 C | +0.40 C |
| 1956 | 9.8 C | +0.47 C |
| 1957 | 9.5 C | +0.23 C |
| 1958 | 9.3 C | -0.02 C |
| 1959 | 9.1 C | -0.18 C |
| 1960 | 8.3 C | -0.98 C |
| 1961 | 8.8 C | -0.52 C |
| 1962 | 8.8 C | -0.46 C |
| 1963 | 9.8 C | +0.50 C |
| 1964 | 9.5 C | +0.24 C |
| 1965 | 8.9 C | -0.44 C |
| 1966 | 8.7 C | -0.59 C |
| 1967 | 8.7 C | -0.56 C |
| 1968 | 9.4 C | +0.14 C |
| 1969 | 8.1 C | -1.18 C |
| 1970 | 8.9 C | -0.39 C |
| 1971 | 9.5 C | +0.25 C |
| 1972 | 8.6 C | -0.69 C |
| 1973 | 10.2 C | +0.90 C |
| 1974 | 10.0 C | +0.70 C |
| 1975 | 8.8 C | -0.50 C |
| 1976 | 9.1 C | -0.16 C |
| 1977 | 9.6 C | +0.28 C |
| 1978 | 7.3 C | -2.00 C |
| 1979 | 7.4 C | -1.85 C |
| 1980 | 9.4 C | +0.14 C |
| 1981 | 10.1 C | +0.78 C |
| 1982 | 8.2 C | -1.13 C |
| 1983 | 8.9 C | -0.42 C |
| 1984 | 9.1 C | -0.24 C |
| 1985 | 8.4 C | -0.85 C |
| 1986 | 9.9 C | +0.61 C |
| 1987 | 11.2 C | +1.89 C |
| 1988 | 9.9 C | +0.64 C |
| 1989 | 8.8 C | -0.52 C |
| 1990 | 10.2 C | +0.95 C |
| 1991 | 10.0 C | +0.69 C |
| 1992 | 9.4 C | +0.10 C |
| 1993 | 7.8 C | -1.53 C |
| 1994 | 9.0 C | -0.32 C |
| 1995 | 9.0 C | -0.29 C |
| 1996 | 7.3 C | -2.04 C |
| 1997 | 8.6 C | -0.68 C |
| 1998 | 10.5 C | +1.21 C |
| 1999 | 10.0 C | +0.72 C |
| 2000 | 9.3 C | +0.00 C |
| 2001 | 9.4 C | +0.06 C |
| 2002 | 9.6 C | +0.29 C |
| 2003 | 9.2 C | -0.12 C |
| 2004 | 9.5 C | +0.25 C |
| 2005 | 10.7 C | +1.43 C |
| 2006 | 10.4 C | +1.11 C |
| 2007 | 9.5 C | +0.23 C |
| 2008 | 7.9 C | -1.36 C |
| 2009 | 8.7 C | -0.63 C |
| 2010 | 9.3 C | -0.03 C |
| 2011 | 9.1 C | -0.17 C |
| 2012 | 11.4 C | +2.07 C |
| 2013 | 8.5 C | -0.76 C |
| 2014 | 8.8 C | -0.50 C |
| 2015 | 10.4 C | +1.14 C |
| 2016 | 11.3 C | +2.03 C |
| 2017 | 10.4 C | +1.11 C |
| 2018 | 8.6 C | -0.71 C |
| 2019 | 8.4 C | -0.87 C |
| 2020 | 9.9 C | +0.64 C |
| 2021 | 10.3 C | +0.99 C |
| 2022 | 9.5 C | +0.18 C |
| 2023 | 10.4 C | +1.15 C |
| 2024 | 10.8 C | +1.55 C |
| 2025 | 10.1 C | +0.76 C |
The annual mean temperature here has risen by 0.10 C (0.02 to 0.17) per decade over 1941 to 2025. In Fahrenheit: 0.17 F (0.04 to 0.31) per decade. The slope is a straight line fitted to 85 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.10 C (0.02 to 0.17) per decade | 0.17 F (0.04 to 0.31) per decade | 1941 to 2025 | 85 | Rise |
| Mean daily maximum | 0.14 C (0.05 to 0.24) per decade | 0.3 F (0.1 to 0.4) per decade | 1941 to 2025 | 85 | Rise |
| Mean daily minimum | 0.05 C (-0.02 to 0.13) per decade | 0.10 F (-0.04 to 0.23) per decade | 1941 to 2025 | 85 | Not clearly different from zero |
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
1940 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.2 C (108.0 F) | 1988 | 37.2 C (99.0 F) | 87 |
| Coldest night (TNn) | -33.2 C (-27.8 F) | 2018 | -27.8 C (-18.0 F) | 87 |
| Wettest day (Rx1day) | 139.7 mm (5.5 in) | 1972 | 57.2 mm (2.3 in) | 87 |
| Wettest five days (Rx5day) | 235.4 mm (9.3 in) | 2014 | 82.8 mm (3.3 in) | 87 |
| Longest dry spell (CDD) | 64 days | 1952 | 28 days | 87 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1940 | 41.7 C (107.1 F) |
| 1941 | 38.3 C (100.9 F) |
| 1942 | 40.6 C (105.1 F) |
| 1943 | 37.8 C (100.0 F) |
| 1944 | 37.8 C (100.0 F) |
| 1945 | 36.1 C (97.0 F) |
| 1946 | 41.1 C (106.0 F) |
| 1947 | 41.7 C (107.1 F) |
| 1948 | 37.8 C (100.0 F) |
| 1949 | 37.2 C (99.0 F) |
| 1950 | 34.4 C (93.9 F) |
| 1951 | 35.6 C (96.1 F) |
| 1952 | 38.3 C (100.9 F) |
| 1953 | 40.6 C (105.1 F) |
| 1954 | 40.6 C (105.1 F) |
| 1955 | 41.7 C (107.1 F) |
| 1956 | 38.9 C (102.0 F) |
| 1957 | 40.0 C (104.0 F) |
| 1958 | 37.2 C (99.0 F) |
| 1959 | 36.7 C (98.1 F) |
| 1960 | 38.3 C (100.9 F) |
| 1961 | 40.0 C (104.0 F) |
| 1962 | 34.4 C (93.9 F) |
| 1963 | 35.6 C (96.1 F) |
| 1964 | 38.9 C (102.0 F) |
| 1965 | 36.7 C (98.1 F) |
| 1966 | 36.1 C (97.0 F) |
| 1967 | 38.9 C (102.0 F) |
| 1968 | 37.2 C (99.0 F) |
| 1969 | 36.7 C (98.1 F) |
| 1970 | 38.3 C (100.9 F) |
| 1971 | 38.3 C (100.9 F) |
| 1972 | 37.8 C (100.0 F) |
| 1973 | 37.2 C (99.0 F) |
| 1974 | 39.4 C (102.9 F) |
| 1975 | 36.7 C (98.1 F) |
| 1976 | 38.9 C (102.0 F) |
| 1977 | 36.7 C (98.1 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 37.2 C (99.0 F) |
| 1980 | 41.1 C (106.0 F) |
| 1981 | 36.7 C (98.1 F) |
| 1982 | 36.7 C (98.1 F) |
| 1983 | 37.8 C (100.0 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 39.4 C (102.9 F) |
| 1986 | 34.4 C (93.9 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 42.2 C (108.0 F) |
| 1989 | 38.9 C (102.0 F) |
| 1990 | 40.0 C (104.0 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 42.2 C (108.0 F) |
| 1996 | 36.1 C (97.0 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 35.6 C (96.1 F) |
| 1999 | 35.6 C (96.1 F) |
| 2000 | 39.4 C (102.9 F) |
| 2001 | 38.3 C (100.9 F) |
| 2002 | 37.2 C (99.0 F) |
| 2003 | 36.7 C (98.1 F) |
| 2004 | 35.0 C (95.0 F) |
| 2005 | 37.2 C (99.0 F) |
| 2006 | 38.9 C (102.0 F) |
| 2007 | 36.7 C (98.1 F) |
| 2008 | 35.6 C (96.1 F) |
| 2009 | 36.1 C (97.0 F) |
| 2010 | 35.0 C (95.0 F) |
| 2011 | 37.8 C (100.0 F) |
| 2012 | 40.0 C (104.0 F) |
| 2013 | 41.1 C (106.0 F) |
| 2014 | 34.4 C (93.9 F) |
| 2015 | 37.2 C (99.0 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 36.1 C (97.0 F) |
| 2018 | 38.9 C (102.0 F) |
| 2019 | 37.2 C (99.0 F) |
| 2020 | 37.2 C (99.0 F) |
| 2021 | 36.1 C (97.0 F) |
| 2022 | 38.9 C (102.0 F) |
| 2023 | 38.9 C (102.0 F) |
| 2024 | 35.6 C (96.1 F) |
| 2025 | 36.7 C (98.1 F) |
| 2026 | 38.3 C (100.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1940 | -21.7 C (-7.1 F) |
| 1941 | -22.2 C (-8.0 F) |
| 1942 | -31.1 C (-24.0 F) |
| 1943 | -31.1 C (-24.0 F) |
| 1944 | -30.6 C (-23.1 F) |
| 1945 | -24.4 C (-11.9 F) |
| 1946 | -27.8 C (-18.0 F) |
| 1947 | -28.3 C (-18.9 F) |
| 1948 | -30.6 C (-23.1 F) |
| 1949 | -27.2 C (-17.0 F) |
| 1950 | -30.6 C (-23.1 F) |
| 1951 | -27.2 C (-17.0 F) |
| 1952 | -23.3 C (-9.9 F) |
| 1953 | -30.6 C (-23.1 F) |
| 1954 | -27.2 C (-17.0 F) |
| 1955 | -26.1 C (-15.0 F) |
| 1956 | -27.2 C (-17.0 F) |
| 1957 | -28.9 C (-20.0 F) |
| 1958 | -28.3 C (-18.9 F) |
| 1959 | -25.6 C (-14.1 F) |
| 1960 | -30.0 C (-22.0 F) |
| 1961 | -27.2 C (-17.0 F) |
| 1962 | -32.2 C (-26.0 F) |
| 1963 | -27.8 C (-18.0 F) |
| 1964 | -28.3 C (-18.9 F) |
| 1965 | -28.9 C (-20.0 F) |
| 1966 | -30.0 C (-22.0 F) |
| 1967 | -28.3 C (-18.9 F) |
| 1968 | -28.3 C (-18.9 F) |
| 1969 | -28.3 C (-18.9 F) |
| 1970 | -32.2 C (-26.0 F) |
| 1971 | -26.1 C (-15.0 F) |
| 1972 | -27.8 C (-18.0 F) |
| 1973 | -26.7 C (-16.1 F) |
| 1974 | -31.1 C (-24.0 F) |
| 1975 | -31.1 C (-24.0 F) |
| 1976 | -27.2 C (-17.0 F) |
| 1977 | -28.9 C (-20.0 F) |
| 1978 | -28.9 C (-20.0 F) |
| 1979 | -31.1 C (-24.0 F) |
| 1980 | -26.7 C (-16.1 F) |
| 1981 | -30.6 C (-23.1 F) |
| 1982 | -30.0 C (-22.0 F) |
| 1983 | -29.4 C (-20.9 F) |
| 1984 | -26.7 C (-16.1 F) |
| 1985 | -27.8 C (-18.0 F) |
| 1986 | -22.8 C (-9.0 F) |
| 1987 | -22.8 C (-9.0 F) |
| 1988 | -30.0 C (-22.0 F) |
| 1989 | -31.1 C (-24.0 F) |
| 1990 | -25.6 C (-14.1 F) |
| 1991 | -25.0 C (-13.0 F) |
| 1992 | -22.2 C (-8.0 F) |
| 1993 | -27.8 C (-18.0 F) |
| 1994 | -28.3 C (-18.9 F) |
| 1995 | -24.4 C (-11.9 F) |
| 1996 | -30.6 C (-23.1 F) |
| 1997 | -25.0 C (-13.0 F) |
| 1998 | -25.6 C (-14.1 F) |
| 1999 | -28.9 C (-20.0 F) |
| 2000 | -26.7 C (-16.1 F) |
| 2001 | -26.7 C (-16.1 F) |
| 2002 | -22.2 C (-8.0 F) |
| 2003 | -25.6 C (-14.1 F) |
| 2004 | -24.4 C (-11.9 F) |
| 2005 | -26.7 C (-16.1 F) |
| 2006 | -25.6 C (-14.1 F) |
| 2007 | -28.3 C (-18.9 F) |
| 2008 | -28.9 C (-20.0 F) |
| 2009 | -28.9 C (-20.0 F) |
| 2010 | -30.0 C (-22.0 F) |
| 2011 | -26.7 C (-16.1 F) |
| 2012 | -21.1 C (-6.0 F) |
| 2013 | -23.8 C (-10.8 F) |
| 2014 | -26.0 C (-14.8 F) |
| 2015 | -24.9 C (-12.8 F) |
| 2016 | -28.8 C (-19.8 F) |
| 2017 | -31.0 C (-23.8 F) |
| 2018 | -33.2 C (-27.8 F) |
| 2019 | -27.7 C (-17.9 F) |
| 2020 | -25.5 C (-13.9 F) |
| 2021 | -33.2 C (-27.8 F) |
| 2022 | -26.6 C (-15.9 F) |
| 2023 | -25.5 C (-13.9 F) |
| 2024 | -28.8 C (-19.8 F) |
| 2025 | -26.6 C (-15.9 F) |
| 2026 | -25.0 C (-13.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1940 | 129.5 mm (5.1 in) |
| 1941 | 50.3 mm (2.0 in) |
| 1942 | 34.5 mm (1.4 in) |
| 1943 | 43.7 mm (1.7 in) |
| 1944 | 34.0 mm (1.3 in) |
| 1945 | 67.1 mm (2.6 in) |
| 1946 | 45.2 mm (1.8 in) |
| 1947 | 46.5 mm (1.8 in) |
| 1948 | 82.0 mm (3.2 in) |
| 1949 | 66.3 mm (2.6 in) |
| 1950 | 46.2 mm (1.8 in) |
| 1951 | 66.5 mm (2.6 in) |
| 1952 | 54.6 mm (2.1 in) |
| 1953 | 74.7 mm (2.9 in) |
| 1954 | 90.7 mm (3.6 in) |
| 1955 | 56.4 mm (2.2 in) |
| 1956 | 69.6 mm (2.7 in) |
| 1957 | 98.0 mm (3.9 in) |
| 1958 | 32.3 mm (1.3 in) |
| 1959 | 54.9 mm (2.2 in) |
| 1960 | 65.0 mm (2.6 in) |
| 1961 | 108.7 mm (4.3 in) |
| 1962 | 57.2 mm (2.3 in) |
| 1963 | 65.8 mm (2.6 in) |
| 1964 | 49.3 mm (1.9 in) |
| 1965 | 74.7 mm (2.9 in) |
| 1966 | 46.2 mm (1.8 in) |
| 1967 | 50.5 mm (2.0 in) |
| 1968 | 58.9 mm (2.3 in) |
| 1969 | 63.2 mm (2.5 in) |
| 1970 | 72.4 mm (2.9 in) |
| 1971 | 54.6 mm (2.1 in) |
| 1972 | 139.7 mm (5.5 in) |
| 1973 | 64.3 mm (2.5 in) |
| 1974 | 32.3 mm (1.3 in) |
| 1975 | 45.2 mm (1.8 in) |
| 1976 | 34.0 mm (1.3 in) |
| 1977 | 60.5 mm (2.4 in) |
| 1978 | 43.7 mm (1.7 in) |
| 1979 | 112.3 mm (4.4 in) |
| 1980 | 32.3 mm (1.3 in) |
| 1981 | 57.4 mm (2.3 in) |
| 1982 | 48.3 mm (1.9 in) |
| 1983 | 49.0 mm (1.9 in) |
| 1984 | 45.0 mm (1.8 in) |
| 1985 | 40.1 mm (1.6 in) |
| 1986 | 46.0 mm (1.8 in) |
| 1987 | 42.2 mm (1.7 in) |
| 1988 | 81.0 mm (3.2 in) |
| 1989 | 68.1 mm (2.7 in) |
| 1990 | 53.3 mm (2.1 in) |
| 1991 | 42.9 mm (1.7 in) |
| 1992 | 56.9 mm (2.2 in) |
| 1993 | 80.3 mm (3.2 in) |
| 1994 | 51.3 mm (2.0 in) |
| 1995 | 50.8 mm (2.0 in) |
| 1996 | 114.6 mm (4.5 in) |
| 1997 | 36.6 mm (1.4 in) |
| 1998 | 53.1 mm (2.1 in) |
| 1999 | 70.6 mm (2.8 in) |
| 2000 | 59.2 mm (2.3 in) |
| 2001 | 44.2 mm (1.7 in) |
| 2002 | 52.3 mm (2.1 in) |
| 2003 | 64.0 mm (2.5 in) |
| 2004 | 42.2 mm (1.7 in) |
| 2005 | 54.4 mm (2.1 in) |
| 2006 | 68.8 mm (2.7 in) |
| 2007 | 68.8 mm (2.7 in) |
| 2008 | 57.2 mm (2.3 in) |
| 2009 | 78.0 mm (3.1 in) |
| 2010 | 69.9 mm (2.8 in) |
| 2011 | 71.4 mm (2.8 in) |
| 2012 | 63.2 mm (2.5 in) |
| 2013 | 59.2 mm (2.3 in) |
| 2014 | 128.3 mm (5.1 in) |
| 2015 | 47.2 mm (1.9 in) |
| 2016 | 62.2 mm (2.4 in) |
| 2017 | 72.4 mm (2.9 in) |
| 2018 | 67.3 mm (2.6 in) |
| 2019 | 73.7 mm (2.9 in) |
| 2020 | 59.2 mm (2.3 in) |
| 2021 | 43.2 mm (1.7 in) |
| 2022 | 49.5 mm (1.9 in) |
| 2023 | 48.8 mm (1.9 in) |
| 2024 | 70.4 mm (2.8 in) |
| 2025 | 46.5 mm (1.8 in) |
| 2026 | 45.7 mm (1.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1940 | 187.0 mm (7.4 in) |
| 1941 | 88.1 mm (3.5 in) |
| 1942 | 60.8 mm (2.4 in) |
| 1943 | 67.4 mm (2.7 in) |
| 1944 | 58.9 mm (2.3 in) |
| 1945 | 82.3 mm (3.2 in) |
| 1946 | 58.7 mm (2.3 in) |
| 1947 | 81.2 mm (3.2 in) |
| 1948 | 90.6 mm (3.6 in) |
| 1949 | 76.2 mm (3.0 in) |
| 1950 | 68.4 mm (2.7 in) |
| 1951 | 109.0 mm (4.3 in) |
| 1952 | 83.0 mm (3.3 in) |
| 1953 | 75.7 mm (3.0 in) |
| 1954 | 125.5 mm (4.9 in) |
| 1955 | 79.0 mm (3.1 in) |
| 1956 | 99.6 mm (3.9 in) |
| 1957 | 169.4 mm (6.7 in) |
| 1958 | 64.0 mm (2.5 in) |
| 1959 | 94.8 mm (3.7 in) |
| 1960 | 92.2 mm (3.6 in) |
| 1961 | 110.5 mm (4.4 in) |
| 1962 | 82.6 mm (3.3 in) |
| 1963 | 97.8 mm (3.9 in) |
| 1964 | 75.7 mm (3.0 in) |
| 1965 | 89.2 mm (3.5 in) |
| 1966 | 57.9 mm (2.3 in) |
| 1967 | 90.1 mm (3.5 in) |
| 1968 | 104.7 mm (4.1 in) |
| 1969 | 82.8 mm (3.3 in) |
| 1970 | 102.0 mm (4.0 in) |
| 1971 | 62.2 mm (2.4 in) |
| 1972 | 163.1 mm (6.4 in) |
| 1973 | 64.3 mm (2.5 in) |
| 1974 | 56.4 mm (2.2 in) |
| 1975 | 87.2 mm (3.4 in) |
| 1976 | 66.1 mm (2.6 in) |
| 1977 | 108.7 mm (4.3 in) |
| 1978 | 61.1 mm (2.4 in) |
| 1979 | 123.7 mm (4.9 in) |
| 1980 | 64.1 mm (2.5 in) |
| 1981 | 67.3 mm (2.6 in) |
| 1982 | 71.8 mm (2.8 in) |
| 1983 | 72.1 mm (2.8 in) |
| 1984 | 65.8 mm (2.6 in) |
| 1985 | 85.1 mm (3.4 in) |
| 1986 | 86.4 mm (3.4 in) |
| 1987 | 91.4 mm (3.6 in) |
| 1988 | 101.6 mm (4.0 in) |
| 1989 | 85.8 mm (3.4 in) |
| 1990 | 77.7 mm (3.1 in) |
| 1991 | 57.5 mm (2.3 in) |
| 1992 | 88.7 mm (3.5 in) |
| 1993 | 98.8 mm (3.9 in) |
| 1994 | 72.7 mm (2.9 in) |
| 1995 | 73.9 mm (2.9 in) |
| 1996 | 161.6 mm (6.4 in) |
| 1997 | 68.6 mm (2.7 in) |
| 1998 | 66.9 mm (2.6 in) |
| 1999 | 89.0 mm (3.5 in) |
| 2000 | 98.6 mm (3.9 in) |
| 2001 | 86.7 mm (3.4 in) |
| 2002 | 72.6 mm (2.9 in) |
| 2003 | 145.5 mm (5.7 in) |
| 2004 | 61.2 mm (2.4 in) |
| 2005 | 64.5 mm (2.5 in) |
| 2006 | 73.6 mm (2.9 in) |
| 2007 | 141.0 mm (5.6 in) |
| 2008 | 75.4 mm (3.0 in) |
| 2009 | 79.8 mm (3.1 in) |
| 2010 | 114.1 mm (4.5 in) |
| 2011 | 85.1 mm (3.4 in) |
| 2012 | 93.2 mm (3.7 in) |
| 2013 | 68.7 mm (2.7 in) |
| 2014 | 235.4 mm (9.3 in) |
| 2015 | 91.7 mm (3.6 in) |
| 2016 | 88.5 mm (3.5 in) |
| 2017 | 127.5 mm (5.0 in) |
| 2018 | 113.0 mm (4.4 in) |
| 2019 | 96.9 mm (3.8 in) |
| 2020 | 68.6 mm (2.7 in) |
| 2021 | 61.0 mm (2.4 in) |
| 2022 | 50.3 mm (2.0 in) |
| 2023 | 79.3 mm (3.1 in) |
| 2024 | 79.8 mm (3.1 in) |
| 2025 | 78.0 mm (3.1 in) |
| 2026 | 88.0 mm (3.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1940 | 17 days |
| 1941 | 21 days |
| 1942 | 37 days |
| 1943 | 36 days |
| 1944 | 33 days |
| 1945 | 40 days |
| 1946 | 41 days |
| 1947 | 24 days |
| 1948 | 24 days |
| 1949 | 33 days |
| 1950 | 34 days |
| 1951 | 18 days |
| 1952 | 64 days |
| 1953 | 25 days |
| 1954 | 25 days |
| 1955 | 29 days |
| 1956 | 26 days |
| 1957 | 37 days |
| 1958 | 53 days |
| 1959 | 18 days |
| 1960 | 34 days |
| 1961 | 30 days |
| 1962 | 49 days |
| 1963 | 31 days |
| 1964 | 28 days |
| 1965 | 22 days |
| 1966 | 26 days |
| 1967 | 39 days |
| 1968 | 22 days |
| 1969 | 18 days |
| 1970 | 26 days |
| 1971 | 31 days |
| 1972 | 25 days |
| 1973 | 20 days |
| 1974 | 22 days |
| 1975 | 29 days |
| 1976 | 37 days |
| 1977 | 19 days |
| 1978 | 19 days |
| 1979 | 35 days |
| 1980 | 34 days |
| 1981 | 30 days |
| 1982 | 20 days |
| 1983 | 19 days |
| 1984 | 29 days |
| 1985 | 24 days |
| 1986 | 32 days |
| 1987 | 26 days |
| 1988 | 28 days |
| 1989 | 28 days |
| 1990 | 20 days |
| 1991 | 23 days |
| 1992 | 22 days |
| 1993 | 27 days |
| 1994 | 37 days |
| 1995 | 29 days |
| 1996 | 25 days |
| 1997 | 32 days |
| 1998 | 45 days |
| 1999 | 41 days |
| 2000 | 26 days |
| 2001 | 40 days |
| 2002 | 30 days |
| 2003 | 19 days |
| 2004 | 26 days |
| 2005 | 30 days |
| 2006 | 19 days |
| 2007 | 43 days |
| 2008 | 14 days |
| 2009 | 24 days |
| 2010 | 29 days |
| 2011 | 41 days |
| 2012 | 30 days |
| 2013 | 23 days |
| 2014 | 41 days |
| 2015 | 26 days |
| 2016 | 23 days |
| 2017 | 33 days |
| 2018 | 23 days |
| 2019 | 18 days |
| 2020 | 28 days |
| 2021 | 29 days |
| 2022 | 26 days |
| 2023 | 27 days |
| 2024 | 35 days |
| 2025 | 38 days |
| 2026 | 56 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
85 years with a frostAcross 85 years with a frost, the median last spring frost at Sioux City AP falls on 28 April and the median first autumn frost on 6 October, which leaves a median of 158 days between them.
In 1996 to 2025 the median growing season was 156 days. That is 2 days fewer than in 1941 to 1970.
Fitted over all years, the growing season changes by -0.9 days per decade at this station.
| Measure | Median, all years | Earliest period (1941 to 1970) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 April | 30 April | 29 April | 1 day earlier | +0.2 days per decade |
| First autumn frost | 6 October | 9 October | 5 October | 4 days earlier | -0.8 days per decade |
| Growing days | 158 days | 158 days | 156 days | 2 days fewer | -0.9 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, 1941 to 2025A day with at least 56.3 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 131.5 mm (5.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 56.3 mm (2.2 in) | |
| 5 years | 73.7 mm (2.9 in) | |
| 10 years | 86.2 mm (3.4 in) | |
| 25 years | 103.3 mm (4.1 in) | |
| 50 years | 117.0 mm (4.6 in) | |
| 100 years | 131.5 mm (5.2 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 1941 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: 139.7 mm (5.5 in) in 1972; 128.3 mm (5.1 in) in 2014; 114.6 mm (4.5 in) in 1996.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Sioux City AP had a mean temperature of 9.9 C (49.7 F) and 730.1 mm (28.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Mead 6S (United States, 139 km away), Clay Ctr (United States, 250 km away) and Columbus 3 NE (United States, 130 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Mead 6S | United States | 139 km (86 mi) | 9.8 C (49.7 F) | 688.4 mm (27.1 in) | 0.75 |
| Clay Ctr | United States | 250 km (155 mi) | 9.7 C (49.4 F) | 698.4 mm (27.5 in) | 0.75 |
| Columbus 3 NE | United States | 130 km (81 mi) | 9.9 C (49.9 F) | 707.3 mm (27.8 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-15).