Wappapello Dam Weather Records (USC00238700)
Record envelope, standing records and threshold days for Wappapello Dam (USC00238700), Missouri, United States, with 88 years of record.
Key Facts for Wappapello Dam
- Wappapello Dam (USC00238700) is a weather station in Missouri, United States at 36.92 latitude and -90.28 longitude, 125 m (410 ft) above sea level.
- The station reports from 1939 to 2026, 88 years of record.
- 1,464 records set at Wappapello Dam still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Wappapello Dam set a daily record high maximum temperature of 36.1 C (97.0 F) on 21 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Missouri, United States, 36.92 latitude, -90.28 longitude.
- Elevation: 125 m (410 ft).
- Period of record: 1939 to 2026, 88 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
12 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 26.1 C (79.0 F) | -27.8 C (-18.0 F) | 20.0 C (68.0 F) | -17.2 C (1.0 F) |
| Feb | 26.7 C (80.1 F) | -22.8 C (-9.0 F) | 22.8 C (73.0 F) | -13.9 C (7.0 F) |
| Mar | 31.1 C (88.0 F) | -16.1 C (3.0 F) | 31.1 C (88.0 F) | -6.1 C (21.0 F) |
| Apr | 33.3 C (91.9 F) | -6.1 C (21.0 F) | 30.0 C (86.0 F) | 4.4 C (39.9 F) |
| May | 35.6 C (96.1 F) | -1.1 C (30.0 F) | 30.0 C (86.0 F) | 4.4 C (39.9 F) |
| Jun | 41.1 C (106.0 F) | 5.6 C (42.1 F) | 34.4 C (93.9 F) | 12.8 C (55.0 F) |
| Jul | 44.4 C (111.9 F) | 10.6 C (51.1 F) | 35.6 C (96.1 F) | 18.9 C (66.0 F) |
| Aug | 42.8 C (109.0 F) | 8.9 C (48.0 F) | 36.7 C (98.1 F) | 16.7 C (62.1 F) |
| Sep | 40.6 C (105.1 F) | 1.1 C (34.0 F) | 37.2 C (99.0 F) | 13.3 C (55.9 F) |
| Oct | 34.4 C (93.9 F) | -5.6 C (21.9 F) | 28.3 C (82.9 F) | 10.6 C (51.1 F) |
| Nov | 29.4 C (84.9 F) | -17.2 C (1.0 F) | n/a | n/a |
| Dec | 23.9 C (75.0 F) | -23.3 C (-9.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1939 | 35 |
| 1940 | 36 |
| 1941 | 40 |
| 1942 | 28 |
| 1943 | 38 |
| 1944 | 21 |
| 1945 | 26 |
| 1946 | 15 |
| 1947 | 20 |
| 1948 | 18 |
| 1949 | 13 |
| 1950 | 29 |
| 1951 | 28 |
| 1952 | 38 |
| 1953 | 31 |
| 1954 | 30 |
| 1955 | 22 |
| 1956 | 12 |
| 1957 | 7 |
| 1958 | 24 |
| 1959 | 14 |
| 1960 | 15 |
| 1961 | 21 |
| 1962 | 22 |
| 1963 | 28 |
| 1964 | 27 |
| 1965 | 18 |
| 1966 | 18 |
| 1967 | 31 |
| 1968 | 9 |
| 1969 | 6 |
| 1970 | 16 |
| 1971 | 13 |
| 1972 | 19 |
| 1973 | 8 |
| 1974 | 22 |
| 1975 | 11 |
| 1976 | 23 |
| 1977 | 22 |
| 1978 | 9 |
| 1979 | 15 |
| 1980 | 29 |
| 1981 | 21 |
| 1982 | 14 |
| 1983 | 17 |
| 1984 | 9 |
| 1985 | 17 |
| 1986 | 21 |
| 1987 | 15 |
| 1988 | 14 |
| 1989 | 18 |
| 1990 | 15 |
| 1991 | 19 |
| 1992 | 4 |
| 1993 | 9 |
| 1994 | 8 |
| 1995 | 13 |
| 1996 | 18 |
| 1997 | 6 |
| 1998 | 5 |
| 1999 | 4 |
| 2000 | 15 |
| 2001 | 5 |
| 2002 | 9 |
| 2003 | 6 |
| 2004 | 12 |
| 2005 | 14 |
| 2006 | 10 |
| 2007 | 13 |
| 2008 | 12 |
| 2009 | 6 |
| 2010 | 7 |
| 2011 | 11 |
| 2012 | 23 |
| 2013 | 14 |
| 2014 | 12 |
| 2015 | 19 |
| 2016 | 7 |
| 2017 | 16 |
| 2018 | 13 |
| 2019 | 11 |
| 2020 | 9 |
| 2021 | 12 |
| 2022 | 13 |
| 2023 | 10 |
| 2024 | 9 |
| 2025 | 11 |
| 2026 | 11 |
All-Time Record Progression
8 new records| Date | Kind | Detail |
|---|---|---|
| 1970-03-17 | Record daily snowfall | Record daily snowfall 30.5 cm (12.0 in) |
| 1973-05-27 | Record daily precipitation | Record daily precipitation 214.6 mm (8.4 in) |
| 1977-03-28 | Record daily precipitation | Record daily precipitation 279.4 mm (11.0 in) |
| 1978-01-17 | Record snow depth | Record snow depth 35.6 cm (14.0 in) |
| 1979-02-26 | Record snow depth | Record snow depth 43.2 cm (17.0 in) |
| 1980-07-13 | Record high maximum temperature | Record high maximum temperature 43.3 C (109.9 F) |
| 1982-01-11 | Record low maximum temperature | Record low maximum temperature -15.6 C (3.9 F) |
| 1997-07-29 | Record high maximum temperature | Record high maximum temperature 44.4 C (111.9 F) |
Wettest Day of Each Month
Mar: 279.4 mm (11.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 152.4 mm (6.0 in) | 30 January 2010 |
| Feb | 90.7 mm (3.6 in) | 25 February 2018 |
| Mar | 279.4 mm (11.0 in) | 28 March 1977 |
| Apr | 133.4 mm (5.3 in) | 30 April 2017 |
| May | 214.6 mm (8.4 in) | 27 May 1973 |
| Jun | 119.4 mm (4.7 in) | 26 June 2024 |
| Jul | 125.7 mm (4.9 in) | 21 July 1946 |
| Aug | 119.1 mm (4.7 in) | 14 August 2016 |
| Sep | 114.3 mm (4.5 in) | 25 September 1945 |
| Oct | 88.9 mm (3.5 in) | 6 October 1998 |
| Nov | 139.7 mm (5.5 in) | 5 November 1994 |
| Dec | 84.6 mm (3.3 in) | 31 December 2002 |
Period of Record Coverage
1939 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1939 | 364 | 100% | Yes |
| 1940 | 364 | 99% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 364 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 353 | 96% | Yes |
| 1949 | 363 | 99% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 365 | 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 | 336 | 92% | Yes |
| 1962 | 363 | 99% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 364 | 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 | 363 | 99% | Yes |
| 1978 | 362 | 99% | Yes |
| 1979 | 361 | 99% | Yes |
| 1980 | 364 | 99% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 274 | 75% | No |
| 1983 | 207 | 57% | No |
| 1984 | 316 | 86% | No |
| 1985 | 325 | 89% | No |
| 1986 | 315 | 86% | No |
| 1987 | 323 | 88% | No |
| 1988 | 335 | 92% | Yes |
| 1989 | 323 | 88% | No |
| 1990 | 343 | 94% | Yes |
| 1991 | 353 | 97% | Yes |
| 1992 | 336 | 92% | Yes |
| 1993 | 340 | 93% | Yes |
| 1994 | 345 | 95% | Yes |
| 1995 | 344 | 94% | Yes |
| 1996 | 348 | 95% | Yes |
| 1997 | 336 | 92% | Yes |
| 1998 | 323 | 88% | No |
| 1999 | 337 | 92% | Yes |
| 2000 | 257 | 70% | No |
| 2001 | 322 | 88% | No |
| 2002 | 355 | 97% | Yes |
| 2003 | 350 | 96% | Yes |
| 2004 | 356 | 97% | Yes |
| 2005 | 326 | 89% | No |
| 2006 | 299 | 82% | No |
| 2007 | 327 | 90% | No |
| 2008 | 309 | 84% | No |
| 2009 | 349 | 96% | Yes |
| 2010 | 347 | 95% | Yes |
| 2011 | 335 | 92% | Yes |
| 2012 | 280 | 77% | No |
| 2013 | 274 | 75% | No |
| 2014 | 296 | 81% | No |
| 2015 | 348 | 95% | Yes |
| 2016 | 362 | 99% | Yes |
| 2017 | 359 | 98% | Yes |
| 2018 | 312 | 85% | No |
| 2019 | 323 | 88% | No |
| 2020 | 344 | 94% | Yes |
| 2021 | 321 | 88% | No |
| 2022 | 320 | 88% | No |
| 2023 | 325 | 89% | No |
| 2024 | 327 | 89% | No |
| 2025 | 331 | 91% | Yes |
| 2026 | 257 | 70% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 21 September 2026 | Wappapello Dam, US | daily high max (Provisional) | 36.1 C (97.0 F) | 0.5 C (0.9 F) | 71 years | 30 of 100 (Routine) |
| 20 September 2026 | Wappapello Dam, US | daily high max (Tie, Provisional) | 36.1 C (97.0 F) | tie | 72 years | 7 of 100 (Routine) |
| 19 September 2026 | Wappapello Dam, US | daily high max (Provisional) | 36.1 C (97.0 F) | 0.5 C (0.9 F) | 72 years | 30 of 100 (Routine) |
| 18 September 2026 | Wappapello Dam, US | daily high max (Provisional) | 35.6 C (96.1 F) | 1.2 C (2.2 F) | 72 years | 31 of 100 (Routine) |
| 17 September 2026 | Wappapello Dam, US | daily high min (Provisional) | 23.3 C (73.9 F) | 1.6 C (2.9 F) | 48 years | 25 of 100 (Routine) |
| 16 September 2026 | Wappapello Dam, US | daily high min (Tie, Provisional) | 21.7 C (71.1 F) | tie | 35 years | 4 of 100 (Routine) |
| 6 September 2026 | Wappapello Dam, US | daily high min (Provisional) | 25.0 C (77.0 F) | 2.2 C (4.0 F) | 55 years | 29 of 100 (Routine) |
| 5 September 2026 | Wappapello Dam, US | daily high min (Provisional) | 24.4 C (75.9 F) | 1.1 C (2.0 F) | 79 years | 33 of 100 (Routine) |
| 4 September 2026 | Wappapello Dam, US | daily high min (Provisional) | 24.4 C (75.9 F) | 1.1 C (2.0 F) | 81 years | 34 of 100 (Routine) |
| 3 September 2026 | Wappapello Dam, US | daily high min (Provisional) | 23.3 C (73.9 F) | 0.5 C (0.9 F) | 51 years | 24 of 100 (Routine) |
| 13 August 2026 | Wappapello Dam, US | daily high min (Tie) | 23.9 C (75.0 F) | tie | 83 years | 8 of 100 (Routine) |
| 10 July 2026 | Wappapello Dam, US | daily rain | 50.8 mm (2.0 in) | 10.2 mm (0.4 in) | 1 year | 14 of 100 (Routine) |
| 19 May 2026 | Wappapello Dam, US | daily high min (Tie) | 21.1 C (70.0 F) | tie | 29 years | 4 of 100 (Routine) |
| 2 April 2026 | Wappapello Dam, US | daily high min (Tie) | 18.9 C (66.0 F) | tie | 80 years | 8 of 100 (Routine) |
| 1 April 2026 | Wappapello Dam, US | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 48 years | 24 of 100 (Routine) |
| 1 April 2026 | Wappapello Dam, US | daily high min (Tie) | 15.0 C (59.0 F) | tie | 80 years | 8 of 100 (Routine) |
| 23 March 2026 | Wappapello Dam, US | daily high max | 30.6 C (87.1 F) | 1.7 C (3.1 F) | 87 years | 36 of 100 (Notable) |
| 22 March 2026 | Wappapello Dam, US | monthly high max | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 59 years | 35 of 100 (Notable) |
| 21 March 2026 | Wappapello Dam, US | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 44 years | 22 of 100 (Routine) |
| 20 March 2026 | Wappapello Dam, US | daily high max (Tie) | 28.3 C (82.9 F) | tie | 77 years | 7 of 100 (Routine) |
Climate Trend
64 complete years, 1939 to 2023| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1939 | 14.9 C | +0.71 C |
| 1940 | 13.4 C | -0.87 C |
| 1941 | 15.8 C | +1.55 C |
| 1942 | 14.4 C | +0.16 C |
| 1943 | 14.3 C | +0.12 C |
| 1944 | 14.5 C | +0.32 C |
| 1945 | 14.0 C | -0.26 C |
| 1947 | 14.2 C | -0.05 C |
| 1948 | 14.5 C | +0.29 C |
| 1949 | 14.8 C | +0.62 C |
| 1950 | 13.7 C | -0.57 C |
| 1951 | 13.7 C | -0.51 C |
| 1952 | 14.9 C | +0.72 C |
| 1953 | 15.4 C | +1.21 C |
| 1954 | 15.6 C | +1.37 C |
| 1955 | 14.8 C | +0.57 C |
| 1956 | 14.9 C | +0.71 C |
| 1957 | 14.4 C | +0.21 C |
| 1958 | 13.6 C | -0.63 C |
| 1959 | 14.4 C | +0.14 C |
| 1960 | 13.7 C | -0.51 C |
| 1962 | 14.0 C | -0.19 C |
| 1963 | 14.0 C | -0.22 C |
| 1964 | 14.5 C | +0.23 C |
| 1965 | 14.4 C | +0.13 C |
| 1966 | 13.3 C | -0.90 C |
| 1967 | 13.5 C | -0.69 C |
| 1968 | 13.5 C | -0.76 C |
| 1969 | 13.8 C | -0.43 C |
| 1970 | 13.8 C | -0.40 C |
| 1971 | 14.4 C | +0.16 C |
| 1972 | 13.6 C | -0.61 C |
| 1973 | 14.6 C | +0.39 C |
| 1974 | 13.9 C | -0.31 C |
| 1975 | 14.0 C | -0.22 C |
| 1976 | 13.3 C | -0.88 C |
| 1977 | 14.1 C | -0.11 C |
| 1978 | 13.1 C | -1.12 C |
| 1979 | 12.5 C | -1.76 C |
| 1980 | 13.8 C | -0.41 C |
| 1981 | 14.0 C | -0.20 C |
| 1984 | 13.8 C | -0.38 C |
| 1988 | 14.4 C | +0.13 C |
| 1990 | 15.1 C | +0.90 C |
| 1991 | 15.1 C | +0.88 C |
| 1992 | 14.4 C | +0.21 C |
| 1993 | 14.0 C | -0.21 C |
| 1994 | 14.4 C | +0.21 C |
| 1995 | 14.4 C | +0.20 C |
| 1996 | 13.3 C | -0.89 C |
| 1997 | 13.8 C | -0.39 C |
| 1999 | 15.5 C | +1.25 C |
| 2002 | 14.5 C | +0.32 C |
| 2003 | 14.1 C | -0.10 C |
| 2004 | 14.7 C | +0.49 C |
| 2009 | 14.2 C | -0.04 C |
| 2010 | 14.5 C | +0.30 C |
| 2015 | 14.1 C | -0.12 C |
| 2016 | 14.8 C | +0.58 C |
| 2017 | 14.6 C | +0.36 C |
| 2018 | 13.6 C | -0.65 C |
| 2019 | 13.8 C | -0.44 C |
| 2020 | 14.0 C | -0.23 C |
| 2023 | 15.1 C | +0.84 C |
The fitted trend in annual mean temperature here over 1939 to 2023 is -0.01 C (-0.08 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.02 F (-0.14 to 0.10) per decade. The slope is a straight line fitted to 64 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.01 C (-0.08 to 0.05) per decade | -0.02 F (-0.14 to 0.10) per decade | 1939 to 2023 | 64 | Not clearly different from zero |
| Mean daily maximum | -0.04 C (-0.12 to 0.05) per decade | -0.1 F (-0.2 to 0.1) per decade | 1939 to 2023 | 64 | Not clearly different from zero |
| Mean daily minimum | 0.01 C (-0.06 to 0.09) per decade | 0.02 F (-0.11 to 0.16) per decade | 1939 to 2023 | 64 | 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
1939 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 44.4 C (111.9 F) | 1997 | 37.8 C (100.0 F) | 88 |
| Coldest night (TNn) | -27.8 C (-18.0 F) | 1942 | -16.7 C (1.9 F) | 88 |
| Wettest day (Rx1day) | 279.4 mm (11.0 in) | 1977 | 74.5 mm (2.9 in) | 88 |
| Wettest five days (Rx5day) | 313.7 mm (12.4 in) | 1977 | 114.1 mm (4.5 in) | 88 |
| Longest dry spell (CDD) | 51 days | 1963 | 20 days | 88 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1939 | 40.6 C (105.1 F) |
| 1940 | 37.2 C (99.0 F) |
| 1941 | 39.4 C (102.9 F) |
| 1942 | 38.3 C (100.9 F) |
| 1943 | 40.6 C (105.1 F) |
| 1944 | 38.9 C (102.0 F) |
| 1945 | 39.4 C (102.9 F) |
| 1946 | 36.7 C (98.1 F) |
| 1947 | 41.1 C (106.0 F) |
| 1948 | 37.2 C (99.0 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 34.4 C (93.9 F) |
| 1951 | 40.6 C (105.1 F) |
| 1952 | 42.2 C (108.0 F) |
| 1953 | 40.0 C (104.0 F) |
| 1954 | 42.8 C (109.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 40.6 C (105.1 F) |
| 1957 | 35.6 C (96.1 F) |
| 1958 | 36.1 C (97.0 F) |
| 1959 | 35.6 C (96.1 F) |
| 1960 | 37.8 C (100.0 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 37.2 C (99.0 F) |
| 1963 | 37.8 C (100.0 F) |
| 1964 | 41.7 C (107.1 F) |
| 1965 | 39.4 C (102.9 F) |
| 1966 | 40.6 C (105.1 F) |
| 1967 | 35.6 C (96.1 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 40.0 C (104.0 F) |
| 1970 | 37.8 C (100.0 F) |
| 1971 | 37.2 C (99.0 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 37.8 C (100.0 F) |
| 1974 | 39.4 C (102.9 F) |
| 1975 | 37.2 C (99.0 F) |
| 1976 | 37.8 C (100.0 F) |
| 1977 | 37.2 C (99.0 F) |
| 1978 | 38.9 C (102.0 F) |
| 1979 | 36.7 C (98.1 F) |
| 1980 | 43.3 C (109.9 F) |
| 1981 | 36.7 C (98.1 F) |
| 1982 | 37.8 C (100.0 F) |
| 1983 | 40.0 C (104.0 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 37.2 C (99.0 F) |
| 1986 | 39.4 C (102.9 F) |
| 1987 | 40.6 C (105.1 F) |
| 1988 | 40.0 C (104.0 F) |
| 1989 | 36.7 C (98.1 F) |
| 1990 | 38.9 C (102.0 F) |
| 1991 | 41.1 C (106.0 F) |
| 1992 | 35.6 C (96.1 F) |
| 1993 | 38.3 C (100.9 F) |
| 1994 | 35.6 C (96.1 F) |
| 1995 | 38.3 C (100.9 F) |
| 1996 | 36.7 C (98.1 F) |
| 1997 | 44.4 C (111.9 F) |
| 1998 | 37.8 C (100.0 F) |
| 1999 | 38.9 C (102.0 F) |
| 2000 | 40.6 C (105.1 F) |
| 2001 | 39.4 C (102.9 F) |
| 2002 | 37.2 C (99.0 F) |
| 2003 | 38.3 C (100.9 F) |
| 2004 | 38.3 C (100.9 F) |
| 2005 | 38.9 C (102.0 F) |
| 2006 | 37.8 C (100.0 F) |
| 2007 | 41.1 C (106.0 F) |
| 2008 | 38.9 C (102.0 F) |
| 2009 | 38.3 C (100.9 F) |
| 2010 | 39.4 C (102.9 F) |
| 2011 | 42.8 C (109.0 F) |
| 2012 | 42.2 C (108.0 F) |
| 2013 | 37.2 C (99.0 F) |
| 2014 | 37.8 C (100.0 F) |
| 2015 | 36.1 C (97.0 F) |
| 2016 | 36.7 C (98.1 F) |
| 2017 | 34.4 C (93.9 F) |
| 2018 | 35.0 C (95.0 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 35.6 C (96.1 F) |
| 2021 | 35.6 C (96.1 F) |
| 2022 | 37.8 C (100.0 F) |
| 2023 | 38.3 C (100.9 F) |
| 2024 | 35.6 C (96.1 F) |
| 2025 | 37.2 C (99.0 F) |
| 2026 | 37.2 C (99.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1939 | -17.2 C (1.0 F) |
| 1940 | -21.7 C (-7.1 F) |
| 1941 | -11.7 C (10.9 F) |
| 1942 | -27.8 C (-18.0 F) |
| 1943 | -16.7 C (1.9 F) |
| 1944 | -14.4 C (6.1 F) |
| 1945 | -15.6 C (3.9 F) |
| 1946 | -13.3 C (8.1 F) |
| 1947 | -15.0 C (5.0 F) |
| 1948 | -16.7 C (1.9 F) |
| 1949 | -15.6 C (3.9 F) |
| 1950 | -17.2 C (1.0 F) |
| 1951 | -22.8 C (-9.0 F) |
| 1952 | -12.2 C (10.0 F) |
| 1953 | -12.8 C (9.0 F) |
| 1954 | -12.2 C (10.0 F) |
| 1955 | -16.7 C (1.9 F) |
| 1956 | -9.4 C (15.1 F) |
| 1957 | -14.4 C (6.1 F) |
| 1958 | -17.8 C (0.0 F) |
| 1959 | -18.3 C (-0.9 F) |
| 1960 | -18.3 C (-0.9 F) |
| 1961 | -19.4 C (-2.9 F) |
| 1962 | -20.0 C (-4.0 F) |
| 1963 | -24.4 C (-11.9 F) |
| 1964 | -16.1 C (3.0 F) |
| 1965 | -18.3 C (-0.9 F) |
| 1966 | -18.9 C (-2.0 F) |
| 1967 | -15.0 C (5.0 F) |
| 1968 | -18.3 C (-0.9 F) |
| 1969 | -13.9 C (7.0 F) |
| 1970 | -19.4 C (-2.9 F) |
| 1971 | -16.1 C (3.0 F) |
| 1972 | -17.2 C (1.0 F) |
| 1973 | -16.7 C (1.9 F) |
| 1974 | -15.6 C (3.9 F) |
| 1975 | -12.8 C (9.0 F) |
| 1976 | -18.9 C (-2.0 F) |
| 1977 | -26.1 C (-15.0 F) |
| 1978 | -19.4 C (-2.9 F) |
| 1979 | -19.4 C (-2.9 F) |
| 1980 | -15.6 C (3.9 F) |
| 1981 | -17.8 C (0.0 F) |
| 1982 | -24.4 C (-11.9 F) |
| 1983 | -22.8 C (-9.0 F) |
| 1984 | -22.2 C (-8.0 F) |
| 1985 | -20.0 C (-4.0 F) |
| 1986 | -16.1 C (3.0 F) |
| 1987 | -10.6 C (12.9 F) |
| 1988 | -16.7 C (1.9 F) |
| 1989 | -23.3 C (-9.9 F) |
| 1990 | -14.4 C (6.1 F) |
| 1991 | -13.9 C (7.0 F) |
| 1992 | -13.3 C (8.1 F) |
| 1993 | -15.0 C (5.0 F) |
| 1994 | -21.1 C (-6.0 F) |
| 1995 | -15.0 C (5.0 F) |
| 1996 | -22.2 C (-8.0 F) |
| 1997 | -16.7 C (1.9 F) |
| 1998 | -11.7 C (10.9 F) |
| 1999 | -15.0 C (5.0 F) |
| 2000 | -11.7 C (10.9 F) |
| 2001 | -16.7 C (1.9 F) |
| 2002 | -11.7 C (10.9 F) |
| 2003 | -17.8 C (0.0 F) |
| 2004 | -18.9 C (-2.0 F) |
| 2005 | -13.9 C (7.0 F) |
| 2006 | -13.3 C (8.1 F) |
| 2007 | -12.2 C (10.0 F) |
| 2008 | -13.9 C (7.0 F) |
| 2009 | -15.0 C (5.0 F) |
| 2010 | -16.1 C (3.0 F) |
| 2011 | -17.2 C (1.0 F) |
| 2012 | -11.1 C (12.0 F) |
| 2013 | -17.2 C (1.0 F) |
| 2014 | -23.9 C (-11.0 F) |
| 2015 | -19.4 C (-2.9 F) |
| 2016 | -13.9 C (7.0 F) |
| 2017 | -16.1 C (3.0 F) |
| 2018 | -17.8 C (0.0 F) |
| 2019 | -11.1 C (12.0 F) |
| 2020 | -11.7 C (10.9 F) |
| 2021 | -17.8 C (0.0 F) |
| 2022 | -11.7 C (10.9 F) |
| 2023 | -6.7 C (19.9 F) |
| 2024 | -17.2 C (1.0 F) |
| 2025 | -15.6 C (3.9 F) |
| 2026 | -17.2 C (1.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1939 | 115.6 mm (4.6 in) |
| 1940 | 38.6 mm (1.5 in) |
| 1941 | 76.2 mm (3.0 in) |
| 1942 | 117.6 mm (4.6 in) |
| 1943 | 75.7 mm (3.0 in) |
| 1944 | 100.8 mm (4.0 in) |
| 1945 | 114.3 mm (4.5 in) |
| 1946 | 125.7 mm (4.9 in) |
| 1947 | 81.5 mm (3.2 in) |
| 1948 | 74.9 mm (2.9 in) |
| 1949 | 75.7 mm (3.0 in) |
| 1950 | 98.3 mm (3.9 in) |
| 1951 | 58.9 mm (2.3 in) |
| 1952 | 50.8 mm (2.0 in) |
| 1953 | 46.2 mm (1.8 in) |
| 1954 | 52.3 mm (2.1 in) |
| 1955 | 60.5 mm (2.4 in) |
| 1956 | 50.8 mm (2.0 in) |
| 1957 | 73.2 mm (2.9 in) |
| 1958 | 61.0 mm (2.4 in) |
| 1959 | 56.1 mm (2.2 in) |
| 1960 | 61.5 mm (2.4 in) |
| 1961 | 80.0 mm (3.1 in) |
| 1962 | 44.7 mm (1.8 in) |
| 1963 | 68.1 mm (2.7 in) |
| 1964 | 156.2 mm (6.1 in) |
| 1965 | 66.8 mm (2.6 in) |
| 1966 | 75.2 mm (3.0 in) |
| 1967 | 76.2 mm (3.0 in) |
| 1968 | 75.4 mm (3.0 in) |
| 1969 | 113.5 mm (4.5 in) |
| 1970 | 64.5 mm (2.5 in) |
| 1971 | 106.4 mm (4.2 in) |
| 1972 | 82.6 mm (3.3 in) |
| 1973 | 214.6 mm (8.4 in) |
| 1974 | 61.0 mm (2.4 in) |
| 1975 | 58.4 mm (2.3 in) |
| 1976 | 72.4 mm (2.9 in) |
| 1977 | 279.4 mm (11.0 in) |
| 1978 | 94.2 mm (3.7 in) |
| 1979 | 73.7 mm (2.9 in) |
| 1980 | 65.0 mm (2.6 in) |
| 1981 | 70.1 mm (2.8 in) |
| 1982 | 121.9 mm (4.8 in) |
| 1983 | 52.8 mm (2.1 in) |
| 1984 | 74.2 mm (2.9 in) |
| 1985 | 51.3 mm (2.0 in) |
| 1986 | 47.0 mm (1.9 in) |
| 1987 | 51.3 mm (2.0 in) |
| 1988 | 66.8 mm (2.6 in) |
| 1989 | 69.6 mm (2.7 in) |
| 1990 | 61.5 mm (2.4 in) |
| 1991 | 104.9 mm (4.1 in) |
| 1992 | 70.4 mm (2.8 in) |
| 1993 | 51.6 mm (2.0 in) |
| 1994 | 139.7 mm (5.5 in) |
| 1995 | 51.1 mm (2.0 in) |
| 1996 | 83.1 mm (3.3 in) |
| 1997 | 85.1 mm (3.4 in) |
| 1998 | 102.9 mm (4.1 in) |
| 1999 | 101.6 mm (4.0 in) |
| 2000 | 102.1 mm (4.0 in) |
| 2001 | 74.7 mm (2.9 in) |
| 2002 | 100.3 mm (3.9 in) |
| 2003 | 82.6 mm (3.3 in) |
| 2004 | 48.3 mm (1.9 in) |
| 2005 | 69.9 mm (2.8 in) |
| 2006 | 61.5 mm (2.4 in) |
| 2007 | 63.5 mm (2.5 in) |
| 2008 | 63.0 mm (2.5 in) |
| 2009 | 84.6 mm (3.3 in) |
| 2010 | 152.4 mm (6.0 in) |
| 2011 | 60.5 mm (2.4 in) |
| 2012 | 62.0 mm (2.4 in) |
| 2013 | 104.1 mm (4.1 in) |
| 2014 | 110.0 mm (4.3 in) |
| 2015 | 83.3 mm (3.3 in) |
| 2016 | 119.1 mm (4.7 in) |
| 2017 | 133.4 mm (5.3 in) |
| 2018 | 90.7 mm (3.6 in) |
| 2019 | 59.7 mm (2.4 in) |
| 2020 | 57.2 mm (2.3 in) |
| 2021 | 94.0 mm (3.7 in) |
| 2022 | 66.3 mm (2.6 in) |
| 2023 | 71.1 mm (2.8 in) |
| 2024 | 119.4 mm (4.7 in) |
| 2025 | 113.0 mm (4.4 in) |
| 2026 | 52.1 mm (2.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1939 | 116.1 mm (4.6 in) |
| 1940 | 80.0 mm (3.1 in) |
| 1941 | 97.5 mm (3.8 in) |
| 1942 | 118.1 mm (4.6 in) |
| 1943 | 102.6 mm (4.0 in) |
| 1944 | 133.7 mm (5.3 in) |
| 1945 | 214.4 mm (8.4 in) |
| 1946 | 188.9 mm (7.4 in) |
| 1947 | 85.0 mm (3.3 in) |
| 1948 | 88.1 mm (3.5 in) |
| 1949 | 149.3 mm (5.9 in) |
| 1950 | 160.0 mm (6.3 in) |
| 1951 | 106.1 mm (4.2 in) |
| 1952 | 87.4 mm (3.4 in) |
| 1953 | 67.6 mm (2.7 in) |
| 1954 | 105.6 mm (4.2 in) |
| 1955 | 99.6 mm (3.9 in) |
| 1956 | 72.7 mm (2.9 in) |
| 1957 | 173.6 mm (6.8 in) |
| 1958 | 148.4 mm (5.8 in) |
| 1959 | 64.0 mm (2.5 in) |
| 1960 | 90.0 mm (3.5 in) |
| 1961 | 184.4 mm (7.3 in) |
| 1962 | 95.5 mm (3.8 in) |
| 1963 | 103.7 mm (4.1 in) |
| 1964 | 238.7 mm (9.4 in) |
| 1965 | 137.4 mm (5.4 in) |
| 1966 | 101.1 mm (4.0 in) |
| 1967 | 136.1 mm (5.4 in) |
| 1968 | 109.2 mm (4.3 in) |
| 1969 | 163.0 mm (6.4 in) |
| 1970 | 93.3 mm (3.7 in) |
| 1971 | 114.6 mm (4.5 in) |
| 1972 | 160.1 mm (6.3 in) |
| 1973 | 247.6 mm (9.7 in) |
| 1974 | 75.5 mm (3.0 in) |
| 1975 | 128.5 mm (5.1 in) |
| 1976 | 103.9 mm (4.1 in) |
| 1977 | 313.7 mm (12.4 in) |
| 1978 | 158.2 mm (6.2 in) |
| 1979 | 107.9 mm (4.2 in) |
| 1980 | 80.3 mm (3.2 in) |
| 1981 | 112.7 mm (4.4 in) |
| 1982 | 155.9 mm (6.1 in) |
| 1983 | 94.0 mm (3.7 in) |
| 1984 | 111.8 mm (4.4 in) |
| 1985 | 90.2 mm (3.6 in) |
| 1986 | 83.9 mm (3.3 in) |
| 1987 | 118.8 mm (4.7 in) |
| 1988 | 77.7 mm (3.1 in) |
| 1989 | 108.9 mm (4.3 in) |
| 1990 | 108.2 mm (4.3 in) |
| 1991 | 136.1 mm (5.4 in) |
| 1992 | 72.9 mm (2.9 in) |
| 1993 | 101.6 mm (4.0 in) |
| 1994 | 173.4 mm (6.8 in) |
| 1995 | 82.3 mm (3.2 in) |
| 1996 | 83.6 mm (3.3 in) |
| 1997 | 127.1 mm (5.0 in) |
| 1998 | 193.8 mm (7.6 in) |
| 1999 | 125.0 mm (4.9 in) |
| 2000 | 128.7 mm (5.1 in) |
| 2001 | 123.0 mm (4.8 in) |
| 2002 | 156.2 mm (6.1 in) |
| 2003 | 238.8 mm (9.4 in) |
| 2004 | 91.0 mm (3.6 in) |
| 2005 | 125.6 mm (4.9 in) |
| 2006 | 105.5 mm (4.2 in) |
| 2007 | 89.3 mm (3.5 in) |
| 2008 | 127.7 mm (5.0 in) |
| 2009 | 126.7 mm (5.0 in) |
| 2010 | 158.0 mm (6.2 in) |
| 2011 | 232.3 mm (9.1 in) |
| 2012 | 49.6 mm (2.0 in) |
| 2013 | 104.1 mm (4.1 in) |
| 2014 | 120.1 mm (4.7 in) |
| 2015 | 182.2 mm (7.2 in) |
| 2016 | 237.2 mm (9.3 in) |
| 2017 | 213.6 mm (8.4 in) |
| 2018 | 202.8 mm (8.0 in) |
| 2019 | 140.4 mm (5.5 in) |
| 2020 | 113.5 mm (4.5 in) |
| 2021 | 90.4 mm (3.6 in) |
| 2022 | 106.9 mm (4.2 in) |
| 2023 | 80.8 mm (3.2 in) |
| 2024 | 138.9 mm (5.5 in) |
| 2025 | 216.4 mm (8.5 in) |
| 2026 | 90.2 mm (3.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1939 | 25 days |
| 1940 | 26 days |
| 1941 | 18 days |
| 1942 | 28 days |
| 1943 | 23 days |
| 1944 | 27 days |
| 1945 | 15 days |
| 1946 | 19 days |
| 1947 | 19 days |
| 1948 | 21 days |
| 1949 | 20 days |
| 1950 | 19 days |
| 1951 | 14 days |
| 1952 | 24 days |
| 1953 | 22 days |
| 1954 | 19 days |
| 1955 | 27 days |
| 1956 | 21 days |
| 1957 | 21 days |
| 1958 | 24 days |
| 1959 | 15 days |
| 1960 | 16 days |
| 1961 | 21 days |
| 1962 | 22 days |
| 1963 | 51 days |
| 1964 | 40 days |
| 1965 | 19 days |
| 1966 | 25 days |
| 1967 | 18 days |
| 1968 | 19 days |
| 1969 | 21 days |
| 1970 | 20 days |
| 1971 | 26 days |
| 1972 | 16 days |
| 1973 | 18 days |
| 1974 | 22 days |
| 1975 | 20 days |
| 1976 | 26 days |
| 1977 | 20 days |
| 1978 | 24 days |
| 1979 | 23 days |
| 1980 | 26 days |
| 1981 | 20 days |
| 1982 | 17 days |
| 1983 | 20 days |
| 1984 | 21 days |
| 1985 | 20 days |
| 1986 | 31 days |
| 1987 | 15 days |
| 1988 | 17 days |
| 1989 | 36 days |
| 1990 | 20 days |
| 1991 | 15 days |
| 1992 | 19 days |
| 1993 | 16 days |
| 1994 | 16 days |
| 1995 | 21 days |
| 1996 | 18 days |
| 1997 | 13 days |
| 1998 | 26 days |
| 1999 | 26 days |
| 2000 | 13 days |
| 2001 | 16 days |
| 2002 | 21 days |
| 2003 | 21 days |
| 2004 | 26 days |
| 2005 | 21 days |
| 2006 | 13 days |
| 2007 | 39 days |
| 2008 | 14 days |
| 2009 | 29 days |
| 2010 | 22 days |
| 2011 | 21 days |
| 2012 | 13 days |
| 2013 | 13 days |
| 2014 | 13 days |
| 2015 | 16 days |
| 2016 | 29 days |
| 2017 | 26 days |
| 2018 | 13 days |
| 2019 | 14 days |
| 2020 | 16 days |
| 2021 | 12 days |
| 2022 | 17 days |
| 2023 | 15 days |
| 2024 | 20 days |
| 2025 | 16 days |
| 2026 | 18 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
64 years with a frostAcross 64 years with a frost, the median last spring frost at Wappapello Dam falls on 3 April and the median first autumn frost on 2 November, which leaves a median of 212 days between them.
In 1975 to 2023 the median growing season was 216 days. That is 9 days more than in 1939 to 1970.
Fitted over all years, the growing season changes by +2.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1939 to 1970) | Recent period (1975 to 2023) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 3 April | 6 April | 31 March | 6 days earlier | -1.3 days per decade |
| First autumn frost | 2 November | 2 November | 3 November | 1 day later | +1.3 days per decade |
| Growing days | 212 days | 207 days | 216 days | 9 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
69 years, 1939 to 2020A day with at least 73.3 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 241.1 mm (9.5 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 73.3 mm (2.9 in) | |
| 5 years | 102.2 mm (4.0 in) | |
| 10 years | 126.5 mm (5.0 in) | |
| 25 years | 164.7 mm (6.5 in) | |
| 50 years | 199.6 mm (7.9 in) | |
| 100 years | 241.1 mm (9.5 in) | Longer than the 69 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, 69 years of values from 1939 to 2020.
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: 279.4 mm (11.0 in) in 1977; 214.6 mm (8.4 in) in 1973; 156.2 mm (6.1 in) in 1964.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).