Chilo Meldahl Locks & Dam Weather Records (USC00331536)
Record envelope, standing records and threshold days for Chilo Meldahl Locks & Dam (USC00331536), Ohio, United States, with 107 years of record.
Key Facts for Chilo Meldahl Locks & Dam
- Chilo Meldahl Locks & Dam (USC00331536) is a weather station in Ohio, United States at 38.80 latitude and -84.17 longitude, 146 m (480 ft) above sea level.
- The station reports from 1920 to 2026, 107 years of record.
- 1,464 records set at Chilo Meldahl Locks & Dam still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Chilo Meldahl Locks & Dam set a daily record precipitation of 23.6 mm (0.9 in) on 27 June 2026.
About the Station
- Location: Ohio, United States, 38.80 latitude, -84.17 longitude.
- Elevation: 146 m (480 ft).
- Period of record: 1920 to 2026, 107 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 24.4 C (75.9 F) | -30.0 C (-22.0 F) | n/a | n/a |
| Feb | 25.0 C (77.0 F) | -26.7 C (-16.1 F) | n/a | n/a |
| Mar | 28.9 C (84.0 F) | -20.0 C (-4.0 F) | n/a | n/a |
| Apr | 33.9 C (93.0 F) | -8.9 C (16.0 F) | n/a | n/a |
| May | 35.6 C (96.1 F) | -3.3 C (26.1 F) | n/a | n/a |
| Jun | 37.8 C (100.0 F) | 3.3 C (37.9 F) | n/a | n/a |
| Jul | 40.6 C (105.1 F) | 6.7 C (44.1 F) | n/a | n/a |
| Aug | 41.7 C (107.1 F) | 5.0 C (41.0 F) | n/a | n/a |
| Sep | 39.4 C (102.9 F) | -0.6 C (30.9 F) | n/a | n/a |
| Oct | 33.9 C (93.0 F) | -7.8 C (18.0 F) | n/a | n/a |
| Nov | 27.8 C (82.0 F) | -19.4 C (-2.9 F) | n/a | n/a |
| Dec | 22.8 C (73.0 F) | -26.1 C (-15.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1920 | 24 |
| 1921 | 53 |
| 1922 | 26 |
| 1923 | 24 |
| 1924 | 18 |
| 1925 | 34 |
| 1926 | 1 |
| 1937 | 12 |
| 1938 | 10 |
| 1939 | 11 |
| 1940 | 30 |
| 1941 | 26 |
| 1942 | 28 |
| 1943 | 30 |
| 1944 | 22 |
| 1945 | 20 |
| 1946 | 12 |
| 1947 | 26 |
| 1948 | 16 |
| 1949 | 19 |
| 1950 | 34 |
| 1951 | 19 |
| 1952 | 29 |
| 1953 | 28 |
| 1954 | 27 |
| 1955 | 15 |
| 1956 | 20 |
| 1957 | 11 |
| 1958 | 17 |
| 1959 | 16 |
| 1960 | 17 |
| 1961 | 14 |
| 1962 | 30 |
| 1963 | 30 |
| 1964 | 19 |
| 1965 | 10 |
| 1966 | 16 |
| 1967 | 15 |
| 1968 | 9 |
| 1969 | 7 |
| 1970 | 14 |
| 1971 | 20 |
| 1972 | 24 |
| 1973 | 16 |
| 1974 | 18 |
| 1975 | 12 |
| 1976 | 21 |
| 1977 | 22 |
| 1978 | 14 |
| 1979 | 7 |
| 1980 | 12 |
| 1981 | 11 |
| 1982 | 8 |
| 1983 | 21 |
| 1984 | 15 |
| 1985 | 17 |
| 1986 | 14 |
| 1987 | 8 |
| 1988 | 18 |
| 1989 | 19 |
| 1990 | 8 |
| 1991 | 14 |
| 1992 | 12 |
| 1993 | 9 |
| 1994 | 7 |
| 1995 | 7 |
| 1996 | 23 |
| 1997 | 12 |
| 1998 | 19 |
| 1999 | 17 |
| 2000 | 8 |
| 2001 | 19 |
| 2002 | 16 |
| 2003 | 4 |
| 2004 | 9 |
| 2005 | 16 |
| 2006 | 13 |
| 2007 | 23 |
| 2008 | 12 |
| 2009 | 8 |
| 2010 | 25 |
| 2011 | 17 |
| 2012 | 30 |
All-Time Record Progression
13 new records| Date | Kind | Detail |
|---|---|---|
| 1963-01-24 | Record low minimum temperature | Record low minimum temperature -27.8 C (-18.0 F) |
| 1963-01-28 | Record low minimum temperature | Record low minimum temperature -28.9 C (-20.0 F) |
| 1966-01-30 | Record low maximum temperature | Record low maximum temperature -13.3 C (8.1 F) |
| 1970-01-09 | Record low maximum temperature | Record low maximum temperature -15.0 C (5.0 F) |
| 1972-01-16 | Record low maximum temperature | Record low maximum temperature -15.6 C (3.9 F) |
| 1977-01-18 | Record low minimum temperature | Record low minimum temperature -29.4 C (-20.9 F) |
| 1979-08-10 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 1983-08-22 | Record high maximum temperature | Record high maximum temperature 41.7 C (107.1 F) |
| 1983-12-25 | Record low maximum temperature | Record low maximum temperature -16.7 C (1.9 F) |
| 1985-01-21 | Record low maximum temperature | Record low maximum temperature -22.2 C (-8.0 F) |
| 1985-10-21 | Record daily precipitation | Record daily precipitation 127.0 mm (5.0 in) |
| 1994-01-19 | Record low minimum temperature | Record low minimum temperature -30.0 C (-22.0 F) |
| 1997-03-02 | Record daily precipitation | Record daily precipitation 182.9 mm (7.2 in) |
Wettest Day of Each Month
Mar: 182.9 mm (7.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 73.2 mm (2.9 in) | 23 January 1982 |
| Feb | 67.3 mm (2.6 in) | 25 February 2011 |
| Mar | 182.9 mm (7.2 in) | 2 March 1997 |
| Apr | 100.1 mm (3.9 in) | 15 April 1939 |
| May | 104.1 mm (4.1 in) | 8 May 1961 |
| Jun | 81.5 mm (3.2 in) | 16 June 1946 |
| Jul | 124.5 mm (4.9 in) | 13 July 1938 |
| Aug | 124.5 mm (4.9 in) | 31 August 1965 |
| Sep | 124.5 mm (4.9 in) | 1 September 1965 |
| Oct | 127.0 mm (5.0 in) | 21 October 1985 |
| Nov | 75.7 mm (3.0 in) | 19 November 1957 |
| Dec | 85.1 mm (3.4 in) | 15 December 1948 |
Period of Record Coverage
1920 to 2012| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1920 | 346 | 95% | Yes |
| 1921 | 348 | 95% | Yes |
| 1922 | 361 | 99% | Yes |
| 1923 | 361 | 99% | Yes |
| 1924 | 321 | 88% | No |
| 1925 | 349 | 96% | Yes |
| 1926 | 67 | 18% | No |
| 1937 | 211 | 58% | No |
| 1938 | 357 | 98% | Yes |
| 1939 | 355 | 97% | Yes |
| 1940 | 355 | 97% | Yes |
| 1941 | 356 | 98% | Yes |
| 1942 | 359 | 98% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 313 | 86% | No |
| 1949 | 332 | 91% | Yes |
| 1950 | 363 | 99% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 363 | 99% | Yes |
| 1954 | 357 | 98% | Yes |
| 1955 | 362 | 99% | Yes |
| 1956 | 335 | 92% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 305 | 83% | No |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 325 | 89% | No |
| 1976 | 345 | 94% | Yes |
| 1977 | 355 | 97% | Yes |
| 1978 | 284 | 78% | No |
| 1979 | 134 | 37% | No |
| 1980 | 357 | 98% | Yes |
| 1981 | 362 | 99% | Yes |
| 1982 | 87 | 24% | No |
| 1983 | 241 | 66% | No |
| 1984 | 365 | 100% | Yes |
| 1985 | 359 | 98% | Yes |
| 1986 | 354 | 97% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 356 | 97% | Yes |
| 1989 | 359 | 98% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 358 | 98% | Yes |
| 1992 | 328 | 90% | No |
| 1993 | 268 | 73% | No |
| 1994 | 354 | 97% | Yes |
| 1995 | 363 | 99% | Yes |
| 1996 | 359 | 98% | Yes |
| 1997 | 324 | 89% | No |
| 1998 | 355 | 97% | Yes |
| 1999 | 355 | 97% | Yes |
| 2000 | 328 | 90% | No |
| 2001 | 360 | 99% | Yes |
| 2002 | 362 | 99% | Yes |
| 2003 | 331 | 91% | Yes |
| 2004 | 353 | 96% | Yes |
| 2005 | 333 | 91% | Yes |
| 2006 | 328 | 90% | No |
| 2007 | 361 | 99% | Yes |
| 2008 | 360 | 98% | Yes |
| 2009 | 353 | 97% | Yes |
| 2010 | 360 | 99% | Yes |
| 2011 | 360 | 99% | Yes |
| 2012 | 314 | 86% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 27 June 2026 | Chilo Meldahl Locks & Dam, US | daily rain | 23.6 mm (0.9 in) | 3.8 mm (0.15 in) | 80 years | 20 of 100 (Routine) |
| 19 December 2025 | Chilo Meldahl Locks & Dam, US | daily rain | 44.2 mm (1.7 in) | 5.1 mm (0.20 in) | 30 years | 24 of 100 (Routine) |
| 20 October 2025 | Chilo Meldahl Locks & Dam, US | daily rain | 27.4 mm (1.1 in) | 2.0 mm (0.08 in) | 4 years | 12 of 100 (Routine) |
| 31 May 2025 | Chilo Meldahl Locks & Dam, US | daily rain | 35.3 mm (1.4 in) | 2.3 mm (0.09 in) | 52 years | 27 of 100 (Routine) |
| 4 May 2025 | Chilo Meldahl Locks & Dam, US | daily rain | 55.6 mm (2.2 in) | 6.8 mm (0.27 in) | 28 years | 23 of 100 (Routine) |
| 26 April 2025 | Chilo Meldahl Locks & Dam, US | daily rain | 21.8 mm (0.9 in) | 7.6 mm (0.30 in) | 94 years | 20 of 100 (Routine) |
| 4 April 2025 | Chilo Meldahl Locks & Dam, US | daily rain | 60.5 mm (2.4 in) | 15.0 mm (0.6 in) | 94 years | 51 of 100 (Notable) |
| 16 February 2025 | Chilo Meldahl Locks & Dam, US | daily rain | 61.0 mm (2.4 in) | 16.3 mm (0.6 in) | 35 years | 36 of 100 (Notable) |
| 14 November 2024 | Chilo Meldahl Locks & Dam, US | daily rain | 40.6 mm (1.6 in) | 2.5 mm (0.10 in) | 52 years | 27 of 100 (Routine) |
| 11 November 2024 | Chilo Meldahl Locks & Dam, US | daily rain | 31.0 mm (1.2 in) | 6.6 mm (0.26 in) | 58 years | 33 of 100 (Routine) |
| 25 January 2024 | Chilo Meldahl Locks & Dam, US | daily rain | 32.0 mm (1.3 in) | 5.1 mm (0.20 in) | 26 years | 23 of 100 (Routine) |
| 10 January 2024 | Chilo Meldahl Locks & Dam, US | daily rain | 22.9 mm (0.9 in) | 3.8 mm (0.15 in) | 66 years | 20 of 100 (Routine) |
| 10 December 2023 | Chilo Meldahl Locks & Dam, US | daily rain | 38.4 mm (1.5 in) | 2.8 mm (0.11 in) | 70 years | 33 of 100 (Routine) |
| 21 November 2023 | Chilo Meldahl Locks & Dam, US | daily rain | 20.3 mm (0.8 in) | 1.5 mm (0.06 in) | 77 years | 20 of 100 (Routine) |
| 25 July 2023 | Chilo Meldahl Locks & Dam, US | daily rain | 39.1 mm (1.5 in) | 6.1 mm (0.24 in) | 44 years | 27 of 100 (Routine) |
| 1 April 2023 | Chilo Meldahl Locks & Dam, US | daily rain | 41.7 mm (1.6 in) | 1.1 mm (0.04 in) | 26 years | 18 of 100 (Routine) |
| 13 January 2023 | Chilo Meldahl Locks & Dam, US | daily rain | 22.4 mm (0.9 in) | 7.4 mm (0.29 in) | 63 years | 20 of 100 (Routine) |
| 4 January 2023 | Chilo Meldahl Locks & Dam, US | daily rain | 37.1 mm (1.5 in) | 2.3 mm (0.09 in) | 17 years | 17 of 100 (Routine) |
| 3 January 2023 | Chilo Meldahl Locks & Dam, US | daily rain | 40.6 mm (1.6 in) | 10.1 mm (0.4 in) | 99 years | 50 of 100 (Notable) |
| 5 August 2022 | Chilo Meldahl Locks & Dam, US | daily rain | 45.7 mm (1.8 in) | 4.3 mm (0.17 in) | 17 years | 18 of 100 (Routine) |
Climate Trend
58 complete years, 1922 to 2011| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1922 | 14.6 C | +2.39 C |
| 1923 | 13.5 C | +1.29 C |
| 1925 | 13.3 C | +1.13 C |
| 1938 | 13.0 C | +0.76 C |
| 1939 | 12.1 C | -0.08 C |
| 1940 | 10.9 C | -1.32 C |
| 1941 | 12.5 C | +0.32 C |
| 1942 | 11.1 C | -1.08 C |
| 1943 | 11.6 C | -0.62 C |
| 1944 | 12.1 C | -0.10 C |
| 1945 | 11.6 C | -0.62 C |
| 1946 | 13.1 C | +0.85 C |
| 1947 | 11.8 C | -0.40 C |
| 1950 | 11.2 C | -0.96 C |
| 1951 | 12.0 C | -0.25 C |
| 1952 | 12.3 C | +0.13 C |
| 1953 | 13.3 C | +1.11 C |
| 1954 | 13.3 C | +1.07 C |
| 1955 | 12.7 C | +0.52 C |
| 1957 | 12.6 C | +0.38 C |
| 1958 | 11.1 C | -1.08 C |
| 1959 | 12.4 C | +0.18 C |
| 1960 | 11.6 C | -0.56 C |
| 1962 | 12.1 C | -0.06 C |
| 1963 | 11.4 C | -0.76 C |
| 1965 | 12.5 C | +0.34 C |
| 1966 | 11.5 C | -0.69 C |
| 1967 | 11.6 C | -0.59 C |
| 1968 | 11.5 C | -0.75 C |
| 1969 | 11.5 C | -0.72 C |
| 1970 | 12.2 C | -0.02 C |
| 1971 | 12.2 C | -0.03 C |
| 1972 | 11.5 C | -0.74 C |
| 1973 | 12.7 C | +0.54 C |
| 1974 | 12.0 C | -0.22 C |
| 1976 | 10.3 C | -1.89 C |
| 1977 | 11.4 C | -0.80 C |
| 1980 | 11.4 C | -0.76 C |
| 1981 | 11.3 C | -0.92 C |
| 1984 | 12.0 C | -0.17 C |
| 1985 | 12.0 C | -0.20 C |
| 1986 | 12.7 C | +0.45 C |
| 1987 | 13.0 C | +0.83 C |
| 1988 | 11.8 C | -0.44 C |
| 1989 | 11.4 C | -0.77 C |
| 1990 | 13.3 C | +1.06 C |
| 1994 | 11.9 C | -0.26 C |
| 1995 | 11.9 C | -0.32 C |
| 1996 | 11.2 C | -0.98 C |
| 1998 | 13.5 C | +1.31 C |
| 1999 | 12.7 C | +0.54 C |
| 2002 | 13.0 C | +0.78 C |
| 2004 | 12.6 C | +0.43 C |
| 2007 | 13.5 C | +1.25 C |
| 2008 | 12.2 C | -0.02 C |
| 2009 | 12.3 C | +0.06 C |
| 2010 | 13.0 C | +0.77 C |
| 2011 | 12.9 C | +0.71 C |
The fitted trend in annual mean temperature here over 1922 to 2011 is -0.01 C (-0.10 to 0.08) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.18 to 0.15) per decade. The slope is a straight line fitted to 58 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 (-0.10 to 0.08) per decade | -0.01 F (-0.18 to 0.15) per decade | 1922 to 2011 | 58 | Not clearly different from zero |
| Mean daily maximum | -0.11 C (-0.22 to 0.01) per decade | -0.20 F (-0.40 to 0.01) per decade | 1922 to 2011 | 58 | Not clearly different from zero |
| Mean daily minimum | 0.10 C (0.00 to 0.19) per decade | 0.17 F (-0.01 to 0.35) per decade | 1922 to 2011 | 58 | 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
1920 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.7 C (107.1 F) | 1983 | 36.1 C (97.0 F) | 83 |
| Coldest night (TNn) | -30.0 C (-22.0 F) | 1994 | -18.3 C (-0.9 F) | 83 |
| Wettest day (Rx1day) | 182.9 mm (7.2 in) | 1997 | 60.1 mm (2.4 in) | 102 |
| Wettest five days (Rx5day) | 261.7 mm (10.3 in) | 1965 | 95.0 mm (3.7 in) | 102 |
| Longest dry spell (CDD) | 36 days | 1963 | 18 days | 102 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1920 | 35.6 C (96.1 F) |
| 1921 | 39.4 C (102.9 F) |
| 1922 | 38.3 C (100.9 F) |
| 1923 | 37.8 C (100.0 F) |
| 1924 | 36.1 C (97.0 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 18.9 C (66.0 F) |
| 1927 | n/a |
| 1928 | n/a |
| 1929 | n/a |
| 1930 | n/a |
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 35.0 C (95.0 F) |
| 1939 | 37.2 C (99.0 F) |
| 1940 | 38.9 C (102.0 F) |
| 1941 | 36.7 C (98.1 F) |
| 1942 | 34.4 C (93.9 F) |
| 1943 | 35.6 C (96.1 F) |
| 1944 | 37.2 C (99.0 F) |
| 1945 | 35.0 C (95.0 F) |
| 1946 | 35.0 C (95.0 F) |
| 1947 | 35.0 C (95.0 F) |
| 1948 | 37.8 C (100.0 F) |
| 1949 | 36.1 C (97.0 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 36.7 C (98.1 F) |
| 1952 | 38.9 C (102.0 F) |
| 1953 | 38.9 C (102.0 F) |
| 1954 | 40.6 C (105.1 F) |
| 1955 | 36.7 C (98.1 F) |
| 1956 | 35.6 C (96.1 F) |
| 1957 | 36.1 C (97.0 F) |
| 1958 | 33.3 C (91.9 F) |
| 1959 | 37.8 C (100.0 F) |
| 1960 | 37.2 C (99.0 F) |
| 1961 | 35.6 C (96.1 F) |
| 1962 | 37.8 C (100.0 F) |
| 1963 | 37.2 C (99.0 F) |
| 1964 | 37.8 C (100.0 F) |
| 1965 | 36.7 C (98.1 F) |
| 1966 | 36.7 C (98.1 F) |
| 1967 | 34.4 C (93.9 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 35.0 C (95.0 F) |
| 1970 | 36.7 C (98.1 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 36.7 C (98.1 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 33.9 C (93.0 F) |
| 1975 | 34.4 C (93.9 F) |
| 1976 | 35.0 C (95.0 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 32.8 C (91.0 F) |
| 1980 | 37.8 C (100.0 F) |
| 1981 | 34.4 C (93.9 F) |
| 1982 | 25.6 C (78.1 F) |
| 1983 | 41.7 C (107.1 F) |
| 1984 | 33.9 C (93.0 F) |
| 1985 | 33.3 C (91.9 F) |
| 1986 | 34.4 C (93.9 F) |
| 1987 | 35.0 C (95.0 F) |
| 1988 | 37.8 C (100.0 F) |
| 1989 | 33.3 C (91.9 F) |
| 1990 | 34.4 C (93.9 F) |
| 1991 | 35.6 C (96.1 F) |
| 1992 | 31.7 C (89.1 F) |
| 1993 | 34.4 C (93.9 F) |
| 1994 | 34.4 C (93.9 F) |
| 1995 | 36.7 C (98.1 F) |
| 1996 | 33.3 C (91.9 F) |
| 1997 | 36.1 C (97.0 F) |
| 1998 | 33.9 C (93.0 F) |
| 1999 | 38.3 C (100.9 F) |
| 2000 | 33.3 C (91.9 F) |
| 2001 | 34.4 C (93.9 F) |
| 2002 | 36.7 C (98.1 F) |
| 2003 | 34.4 C (93.9 F) |
| 2004 | 32.8 C (91.0 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 34.4 C (93.9 F) |
| 2007 | 38.3 C (100.9 F) |
| 2008 | 35.6 C (96.1 F) |
| 2009 | 32.8 C (91.0 F) |
| 2010 | 36.7 C (98.1 F) |
| 2011 | 37.8 C (100.0 F) |
| 2012 | 39.4 C (102.9 F) |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1920 | -18.3 C (-0.9 F) |
| 1921 | -11.7 C (10.9 F) |
| 1922 | -13.3 C (8.1 F) |
| 1923 | -17.8 C (0.0 F) |
| 1924 | -19.4 C (-2.9 F) |
| 1925 | -23.9 C (-11.0 F) |
| 1926 | -20.0 C (-4.0 F) |
| 1927 | n/a |
| 1928 | n/a |
| 1929 | n/a |
| 1930 | n/a |
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | -13.9 C (7.0 F) |
| 1938 | -15.6 C (3.9 F) |
| 1939 | -15.6 C (3.9 F) |
| 1940 | -23.9 C (-11.0 F) |
| 1941 | -15.6 C (3.9 F) |
| 1942 | -26.7 C (-16.1 F) |
| 1943 | -18.3 C (-0.9 F) |
| 1944 | -17.8 C (0.0 F) |
| 1945 | -20.0 C (-4.0 F) |
| 1946 | -13.3 C (8.1 F) |
| 1947 | -16.1 C (3.0 F) |
| 1948 | -23.3 C (-9.9 F) |
| 1949 | -12.8 C (9.0 F) |
| 1950 | -18.9 C (-2.0 F) |
| 1951 | -26.7 C (-16.1 F) |
| 1952 | -16.7 C (1.9 F) |
| 1953 | -18.3 C (-0.9 F) |
| 1954 | -18.3 C (-0.9 F) |
| 1955 | -19.4 C (-2.9 F) |
| 1956 | -13.9 C (7.0 F) |
| 1957 | -20.6 C (-5.1 F) |
| 1958 | -19.4 C (-2.9 F) |
| 1959 | -20.6 C (-5.1 F) |
| 1960 | -21.1 C (-6.0 F) |
| 1961 | -23.9 C (-11.0 F) |
| 1962 | -21.7 C (-7.1 F) |
| 1963 | -28.9 C (-20.0 F) |
| 1964 | -15.0 C (5.0 F) |
| 1965 | -20.0 C (-4.0 F) |
| 1966 | -22.8 C (-9.0 F) |
| 1967 | -18.9 C (-2.0 F) |
| 1968 | -22.2 C (-8.0 F) |
| 1969 | -16.7 C (1.9 F) |
| 1970 | -19.4 C (-2.9 F) |
| 1971 | -19.4 C (-2.9 F) |
| 1972 | -24.4 C (-11.9 F) |
| 1973 | -16.7 C (1.9 F) |
| 1974 | -12.8 C (9.0 F) |
| 1975 | -14.4 C (6.1 F) |
| 1976 | -19.4 C (-2.9 F) |
| 1977 | -29.4 C (-20.9 F) |
| 1978 | -22.2 C (-8.0 F) |
| 1979 | -18.9 C (-2.0 F) |
| 1980 | -20.0 C (-4.0 F) |
| 1981 | -21.1 C (-6.0 F) |
| 1982 | -26.1 C (-15.0 F) |
| 1983 | -22.2 C (-8.0 F) |
| 1984 | -27.8 C (-18.0 F) |
| 1985 | -27.2 C (-17.0 F) |
| 1986 | -16.7 C (1.9 F) |
| 1987 | -14.4 C (6.1 F) |
| 1988 | -17.8 C (0.0 F) |
| 1989 | -26.1 C (-15.0 F) |
| 1990 | -12.2 C (10.0 F) |
| 1991 | -15.6 C (3.9 F) |
| 1992 | -10.0 C (14.0 F) |
| 1993 | -16.1 C (3.0 F) |
| 1994 | -30.0 C (-22.0 F) |
| 1995 | -17.2 C (1.0 F) |
| 1996 | -23.3 C (-9.9 F) |
| 1997 | -18.3 C (-0.9 F) |
| 1998 | -12.2 C (10.0 F) |
| 1999 | -17.2 C (1.0 F) |
| 2000 | -17.8 C (0.0 F) |
| 2001 | -14.4 C (6.1 F) |
| 2002 | -16.7 C (1.9 F) |
| 2003 | -18.9 C (-2.0 F) |
| 2004 | -21.1 C (-6.0 F) |
| 2005 | -15.0 C (5.0 F) |
| 2006 | -15.0 C (5.0 F) |
| 2007 | -17.8 C (0.0 F) |
| 2008 | -15.6 C (3.9 F) |
| 2009 | -20.6 C (-5.1 F) |
| 2010 | -15.6 C (3.9 F) |
| 2011 | -24.4 C (-11.9 F) |
| 2012 | -8.9 C (16.0 F) |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1920 | 71.6 mm (2.8 in) |
| 1921 | 85.1 mm (3.4 in) |
| 1922 | 108.0 mm (4.3 in) |
| 1923 | 53.3 mm (2.1 in) |
| 1924 | 43.2 mm (1.7 in) |
| 1925 | 59.4 mm (2.3 in) |
| 1926 | 49.5 mm (1.9 in) |
| 1927 | 48.3 mm (1.9 in) |
| 1928 | 36.8 mm (1.4 in) |
| 1929 | 49.0 mm (1.9 in) |
| 1930 | 34.3 mm (1.4 in) |
| 1931 | 45.5 mm (1.8 in) |
| 1932 | 68.6 mm (2.7 in) |
| 1933 | 66.8 mm (2.6 in) |
| 1934 | 37.1 mm (1.5 in) |
| 1935 | 75.7 mm (3.0 in) |
| 1936 | 52.8 mm (2.1 in) |
| 1937 | 50.0 mm (2.0 in) |
| 1938 | 124.5 mm (4.9 in) |
| 1939 | 100.1 mm (3.9 in) |
| 1940 | 65.5 mm (2.6 in) |
| 1941 | 66.0 mm (2.6 in) |
| 1942 | 40.6 mm (1.6 in) |
| 1943 | 77.0 mm (3.0 in) |
| 1944 | 50.8 mm (2.0 in) |
| 1945 | 79.2 mm (3.1 in) |
| 1946 | 81.5 mm (3.2 in) |
| 1947 | 57.4 mm (2.3 in) |
| 1948 | 85.1 mm (3.4 in) |
| 1949 | 41.1 mm (1.6 in) |
| 1950 | 61.0 mm (2.4 in) |
| 1951 | 38.1 mm (1.5 in) |
| 1952 | 45.2 mm (1.8 in) |
| 1953 | 30.0 mm (1.2 in) |
| 1954 | 59.7 mm (2.4 in) |
| 1955 | 57.2 mm (2.3 in) |
| 1956 | 68.6 mm (2.7 in) |
| 1957 | 75.7 mm (3.0 in) |
| 1958 | 69.1 mm (2.7 in) |
| 1959 | 38.6 mm (1.5 in) |
| 1960 | 47.8 mm (1.9 in) |
| 1961 | 104.1 mm (4.1 in) |
| 1962 | 48.8 mm (1.9 in) |
| 1963 | 59.7 mm (2.4 in) |
| 1964 | 115.3 mm (4.5 in) |
| 1965 | 124.5 mm (4.9 in) |
| 1966 | 52.1 mm (2.1 in) |
| 1967 | 87.6 mm (3.4 in) |
| 1968 | 88.9 mm (3.5 in) |
| 1969 | 100.8 mm (4.0 in) |
| 1970 | 83.8 mm (3.3 in) |
| 1971 | 78.5 mm (3.1 in) |
| 1972 | 39.1 mm (1.5 in) |
| 1973 | 55.9 mm (2.2 in) |
| 1974 | 50.5 mm (2.0 in) |
| 1975 | 78.7 mm (3.1 in) |
| 1976 | 94.5 mm (3.7 in) |
| 1977 | 76.2 mm (3.0 in) |
| 1978 | 52.1 mm (2.1 in) |
| 1979 | 76.2 mm (3.0 in) |
| 1980 | 55.9 mm (2.2 in) |
| 1981 | 67.8 mm (2.7 in) |
| 1982 | 73.2 mm (2.9 in) |
| 1983 | 67.3 mm (2.6 in) |
| 1984 | 47.8 mm (1.9 in) |
| 1985 | 127.0 mm (5.0 in) |
| 1986 | 58.4 mm (2.3 in) |
| 1987 | 39.1 mm (1.5 in) |
| 1988 | 55.9 mm (2.2 in) |
| 1989 | 50.8 mm (2.0 in) |
| 1990 | 61.0 mm (2.4 in) |
| 1991 | 97.0 mm (3.8 in) |
| 1992 | 44.7 mm (1.8 in) |
| 1993 | 57.2 mm (2.3 in) |
| 1994 | 53.1 mm (2.1 in) |
| 1995 | 113.0 mm (4.4 in) |
| 1996 | 104.4 mm (4.1 in) |
| 1997 | 182.9 mm (7.2 in) |
| 1998 | 80.0 mm (3.1 in) |
| 1999 | 49.8 mm (2.0 in) |
| 2000 | 72.4 mm (2.9 in) |
| 2001 | 44.5 mm (1.8 in) |
| 2002 | 52.8 mm (2.1 in) |
| 2003 | 49.8 mm (2.0 in) |
| 2004 | 58.9 mm (2.3 in) |
| 2005 | 67.6 mm (2.7 in) |
| 2006 | 55.9 mm (2.2 in) |
| 2007 | 60.5 mm (2.4 in) |
| 2008 | 95.3 mm (3.8 in) |
| 2009 | 48.3 mm (1.9 in) |
| 2010 | 67.8 mm (2.7 in) |
| 2011 | 67.3 mm (2.6 in) |
| 2012 | 67.3 mm (2.6 in) |
| 2018 | 119.4 mm (4.7 in) |
| 2019 | 54.1 mm (2.1 in) |
| 2020 | 70.1 mm (2.8 in) |
| 2021 | 72.4 mm (2.9 in) |
| 2022 | 59.7 mm (2.4 in) |
| 2023 | 41.7 mm (1.6 in) |
| 2024 | 40.6 mm (1.6 in) |
| 2025 | 61.0 mm (2.4 in) |
| 2026 | 33.0 mm (1.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1920 | 117.1 mm (4.6 in) |
| 1921 | 99.8 mm (3.9 in) |
| 1922 | 124.5 mm (4.9 in) |
| 1923 | 67.0 mm (2.6 in) |
| 1924 | 89.1 mm (3.5 in) |
| 1925 | 85.5 mm (3.4 in) |
| 1926 | 95.7 mm (3.8 in) |
| 1927 | 120.2 mm (4.7 in) |
| 1928 | 57.6 mm (2.3 in) |
| 1929 | 89.1 mm (3.5 in) |
| 1930 | 45.9 mm (1.8 in) |
| 1931 | 72.3 mm (2.8 in) |
| 1932 | 115.6 mm (4.6 in) |
| 1933 | 122.7 mm (4.8 in) |
| 1934 | 50.6 mm (2.0 in) |
| 1935 | 112.3 mm (4.4 in) |
| 1936 | 74.2 mm (2.9 in) |
| 1937 | 74.1 mm (2.9 in) |
| 1938 | 146.6 mm (5.8 in) |
| 1939 | 155.8 mm (6.1 in) |
| 1940 | 111.5 mm (4.4 in) |
| 1941 | 82.5 mm (3.2 in) |
| 1942 | 65.8 mm (2.6 in) |
| 1943 | 123.7 mm (4.9 in) |
| 1944 | 66.8 mm (2.6 in) |
| 1945 | 136.4 mm (5.4 in) |
| 1946 | 149.1 mm (5.9 in) |
| 1947 | 58.9 mm (2.3 in) |
| 1948 | 135.2 mm (5.3 in) |
| 1949 | 79.1 mm (3.1 in) |
| 1950 | 109.8 mm (4.3 in) |
| 1951 | 68.4 mm (2.7 in) |
| 1952 | 65.5 mm (2.6 in) |
| 1953 | 54.1 mm (2.1 in) |
| 1954 | 84.3 mm (3.3 in) |
| 1955 | 79.0 mm (3.1 in) |
| 1956 | 80.3 mm (3.2 in) |
| 1957 | 88.2 mm (3.5 in) |
| 1958 | 90.3 mm (3.6 in) |
| 1959 | 76.2 mm (3.0 in) |
| 1960 | 73.1 mm (2.9 in) |
| 1961 | 160.3 mm (6.3 in) |
| 1962 | 117.4 mm (4.6 in) |
| 1963 | 91.5 mm (3.6 in) |
| 1964 | 165.9 mm (6.5 in) |
| 1965 | 261.7 mm (10.3 in) |
| 1966 | 107.7 mm (4.2 in) |
| 1967 | 94.7 mm (3.7 in) |
| 1968 | 152.4 mm (6.0 in) |
| 1969 | 111.9 mm (4.4 in) |
| 1970 | 98.5 mm (3.9 in) |
| 1971 | 100.1 mm (3.9 in) |
| 1972 | 86.4 mm (3.4 in) |
| 1973 | 103.3 mm (4.1 in) |
| 1974 | 81.8 mm (3.2 in) |
| 1975 | 107.2 mm (4.2 in) |
| 1976 | 126.7 mm (5.0 in) |
| 1977 | 128.8 mm (5.1 in) |
| 1978 | 83.1 mm (3.3 in) |
| 1979 | 108.1 mm (4.3 in) |
| 1980 | 91.5 mm (3.6 in) |
| 1981 | 156.2 mm (6.1 in) |
| 1982 | 85.9 mm (3.4 in) |
| 1983 | 161.5 mm (6.4 in) |
| 1984 | 59.0 mm (2.3 in) |
| 1985 | 160.3 mm (6.3 in) |
| 1986 | 111.7 mm (4.4 in) |
| 1987 | 63.4 mm (2.5 in) |
| 1988 | 92.0 mm (3.6 in) |
| 1989 | 110.7 mm (4.4 in) |
| 1990 | 94.7 mm (3.7 in) |
| 1991 | 109.4 mm (4.3 in) |
| 1992 | 66.8 mm (2.6 in) |
| 1993 | 116.3 mm (4.6 in) |
| 1994 | 74.1 mm (2.9 in) |
| 1995 | 158.2 mm (6.2 in) |
| 1996 | 106.7 mm (4.2 in) |
| 1997 | 254.1 mm (10.0 in) |
| 1998 | 133.2 mm (5.2 in) |
| 1999 | 63.8 mm (2.5 in) |
| 2000 | 87.4 mm (3.4 in) |
| 2001 | 62.7 mm (2.5 in) |
| 2002 | 87.9 mm (3.5 in) |
| 2003 | 98.8 mm (3.9 in) |
| 2004 | 78.5 mm (3.1 in) |
| 2005 | 124.8 mm (4.9 in) |
| 2006 | 86.9 mm (3.4 in) |
| 2007 | 103.2 mm (4.1 in) |
| 2008 | 118.7 mm (4.7 in) |
| 2009 | 92.5 mm (3.6 in) |
| 2010 | 79.2 mm (3.1 in) |
| 2011 | 122.6 mm (4.8 in) |
| 2012 | 95.2 mm (3.7 in) |
| 2018 | 130.1 mm (5.1 in) |
| 2019 | 110.6 mm (4.4 in) |
| 2020 | 93.6 mm (3.7 in) |
| 2021 | 83.3 mm (3.3 in) |
| 2022 | 85.6 mm (3.4 in) |
| 2023 | 84.1 mm (3.3 in) |
| 2024 | 103.2 mm (4.1 in) |
| 2025 | 156.6 mm (6.2 in) |
| 2026 | 74.9 mm (2.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1920 | 27 days |
| 1921 | 10 days |
| 1922 | 20 days |
| 1923 | 27 days |
| 1924 | 19 days |
| 1925 | 19 days |
| 1926 | 10 days |
| 1927 | 20 days |
| 1928 | 20 days |
| 1929 | 14 days |
| 1930 | 27 days |
| 1931 | 12 days |
| 1932 | 17 days |
| 1933 | 23 days |
| 1934 | 23 days |
| 1935 | 17 days |
| 1936 | 29 days |
| 1937 | 17 days |
| 1938 | 19 days |
| 1939 | 20 days |
| 1940 | 14 days |
| 1941 | 23 days |
| 1942 | 18 days |
| 1943 | 27 days |
| 1944 | 25 days |
| 1945 | 20 days |
| 1946 | 13 days |
| 1947 | 17 days |
| 1948 | 20 days |
| 1949 | 15 days |
| 1950 | 15 days |
| 1951 | 22 days |
| 1952 | 29 days |
| 1953 | 26 days |
| 1954 | 16 days |
| 1955 | 15 days |
| 1956 | 15 days |
| 1957 | 23 days |
| 1958 | 13 days |
| 1959 | 16 days |
| 1960 | 19 days |
| 1961 | 17 days |
| 1962 | 18 days |
| 1963 | 36 days |
| 1964 | 29 days |
| 1965 | 20 days |
| 1966 | 21 days |
| 1967 | 20 days |
| 1968 | 18 days |
| 1969 | 16 days |
| 1970 | 13 days |
| 1971 | 16 days |
| 1972 | 13 days |
| 1973 | 17 days |
| 1974 | 13 days |
| 1975 | 12 days |
| 1976 | 26 days |
| 1977 | 22 days |
| 1978 | 13 days |
| 1979 | 15 days |
| 1980 | 14 days |
| 1981 | 19 days |
| 1982 | 13 days |
| 1983 | 15 days |
| 1984 | 20 days |
| 1985 | 23 days |
| 1986 | 28 days |
| 1987 | 21 days |
| 1988 | 29 days |
| 1989 | 14 days |
| 1990 | 21 days |
| 1991 | 29 days |
| 1992 | 19 days |
| 1993 | 15 days |
| 1994 | 23 days |
| 1995 | 23 days |
| 1996 | 14 days |
| 1997 | 22 days |
| 1998 | 20 days |
| 1999 | 18 days |
| 2000 | 19 days |
| 2001 | 16 days |
| 2002 | 18 days |
| 2003 | 16 days |
| 2004 | 23 days |
| 2005 | 25 days |
| 2006 | 16 days |
| 2007 | 18 days |
| 2008 | 20 days |
| 2009 | 17 days |
| 2010 | 28 days |
| 2011 | 13 days |
| 2012 | 17 days |
| 2018 | 12 days |
| 2019 | 22 days |
| 2020 | 15 days |
| 2021 | 13 days |
| 2022 | 16 days |
| 2023 | 16 days |
| 2024 | 17 days |
| 2025 | 26 days |
| 2026 | 13 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
58 years with a frostAcross 58 years with a frost, the median last spring frost at Chilo Meldahl Locks & Dam falls on 19 April and the median first autumn frost on 24 October, which leaves a median of 186 days between them.
Fitted over all years, the growing season changes by +4.7 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1968 to 2011) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 19 April | n/a | 13 April | n/a | -2.1 days per decade |
| First autumn frost | 24 October | n/a | 30 October | n/a | +2.6 days per decade |
| Growing days | 186 days | n/a | 200 days | n/a | +4.7 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
93 years, 1920 to 2025A day with at least 61.1 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 158.6 mm (6.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 61.1 mm (2.4 in) | |
| 5 years | 82.5 mm (3.2 in) | |
| 10 years | 98.4 mm (3.9 in) | |
| 25 years | 120.6 mm (4.7 in) | |
| 50 years | 138.9 mm (5.5 in) | |
| 100 years | 158.6 mm (6.2 in) | Longer than the 93 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, 93 years of values from 1920 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: 182.9 mm (7.2 in) in 1997; 127.0 mm (5.0 in) in 1985; 124.5 mm (4.9 in) in 1938.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Chilo Meldahl Locks & Dam, at 1976. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1976 ran 0.2 C (0.4 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1976 | -0.2 | -0.4 | possible | 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.
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 (2026-10-12).