Trenton Dam 1N Weather Records (USC00258628)
Record envelope, standing records and threshold days for Trenton Dam 1N (USC00258628), Nebraska, United States, with 108 years of record.
Key Facts for Trenton Dam 1N
- Trenton Dam 1N (USC00258628) is a weather station in Nebraska, United States at 40.19 latitude and -101.07 longitude, 857 m (2,813 ft) above sea level.
- The station reports from 1919 to 2026, 108 years of record.
- 1,464 records set at Trenton Dam 1N still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Trenton Dam 1N set a daily record high minimum temperature of 14.4 C (57.9 F) on 12 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Nebraska, United States, 40.19 latitude, -101.07 longitude.
- Elevation: 857 m (2,813 ft).
- Period of record: 1919 to 2026, 108 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
19 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 25.6 C (78.1 F) | -31.1 C (-24.0 F) | 23.3 C (73.9 F) | -22.2 C (-8.0 F) |
| Feb | 27.8 C (82.0 F) | -31.1 C (-24.0 F) | 25.0 C (77.0 F) | -18.9 C (-2.0 F) |
| Mar | 36.7 C (98.1 F) | -31.7 C (-25.1 F) | 36.7 C (98.1 F) | -13.3 C (8.1 F) |
| Apr | 38.3 C (100.9 F) | -12.8 C (9.0 F) | 34.4 C (93.9 F) | -5.6 C (21.9 F) |
| May | 39.4 C (102.9 F) | -5.0 C (23.0 F) | 34.4 C (93.9 F) | -1.7 C (28.9 F) |
| Jun | 43.9 C (111.0 F) | 1.1 C (34.0 F) | 36.1 C (97.0 F) | 7.2 C (45.0 F) |
| Jul | 43.9 C (111.0 F) | 5.6 C (42.1 F) | 41.7 C (107.1 F) | 12.2 C (54.0 F) |
| Aug | 43.9 C (111.0 F) | 5.6 C (42.1 F) | 42.2 C (108.0 F) | 13.9 C (57.0 F) |
| Sep | 41.1 C (106.0 F) | -3.9 C (25.0 F) | 39.4 C (102.9 F) | 10.6 C (51.1 F) |
| Oct | 36.1 C (97.0 F) | -16.7 C (1.9 F) | 33.9 C (93.0 F) | 3.9 C (39.0 F) |
| Nov | 30.0 C (86.0 F) | -26.7 C (-16.1 F) | n/a | n/a |
| Dec | 26.1 C (79.0 F) | -35.0 C (-31.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1949 | 14 |
| 1950 | 25 |
| 1951 | 26 |
| 1952 | 31 |
| 1953 | 39 |
| 1954 | 30 |
| 1955 | 35 |
| 1956 | 17 |
| 1957 | 12 |
| 1958 | 12 |
| 1959 | 19 |
| 1960 | 25 |
| 1961 | 11 |
| 1962 | 26 |
| 1963 | 20 |
| 1964 | 17 |
| 1965 | 27 |
| 1966 | 15 |
| 1967 | 25 |
| 1968 | 14 |
| 1969 | 16 |
| 1970 | 15 |
| 1971 | 13 |
| 1972 | 29 |
| 1973 | 15 |
| 1974 | 21 |
| 1975 | 16 |
| 1976 | 15 |
| 1977 | 11 |
| 1978 | 15 |
| 1979 | 14 |
| 1980 | 17 |
| 1981 | 13 |
| 1982 | 9 |
| 1983 | 33 |
| 1984 | 12 |
| 1985 | 20 |
| 1986 | 21 |
| 1987 | 20 |
| 1988 | 12 |
| 1989 | 42 |
| 1990 | 24 |
| 1991 | 23 |
| 1992 | 18 |
| 1993 | 8 |
| 1994 | 18 |
| 1995 | 20 |
| 1996 | 14 |
| 1997 | 18 |
| 1998 | 16 |
| 1999 | 11 |
| 2000 | 17 |
| 2001 | 12 |
| 2002 | 29 |
| 2003 | 17 |
| 2004 | 23 |
| 2005 | 22 |
| 2006 | 17 |
| 2007 | 15 |
| 2008 | 5 |
| 2009 | 12 |
| 2010 | 8 |
| 2011 | 19 |
| 2012 | 40 |
| 2013 | 24 |
| 2014 | 17 |
| 2015 | 23 |
| 2018 | 9 |
| 2019 | 20 |
| 2020 | 29 |
| 2021 | 28 |
| 2022 | 16 |
| 2023 | 20 |
| 2024 | 14 |
| 2025 | 23 |
| 2026 | 16 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1980-03-29 | Record snow depth | Record snow depth 50.8 cm (20.0 in) |
| 1981-07-18 | Record daily precipitation | Record daily precipitation 156.5 mm (6.2 in) |
| 1983-06-20 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
| 1984-03-19 | Record daily snowfall | Record daily snowfall 37.8 cm (14.9 in) |
| 1989-02-05 | Record low maximum temperature | Record low maximum temperature -21.1 C (-6.0 F) |
| 1989-12-22 | Record low minimum temperature | Record low minimum temperature -35.0 C (-31.0 F) |
Wettest Day of Each Month
Jul: 156.5 mm (6.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 33.8 mm (1.3 in) | 20 January 1990 |
| Feb | 35.3 mm (1.4 in) | 19 February 1971 |
| Mar | 51.6 mm (2.0 in) | 14 March 2021 |
| Apr | 76.2 mm (3.0 in) | 11 April 1920 |
| May | 94.7 mm (3.7 in) | 26 May 2023 |
| Jun | 97.8 mm (3.9 in) | 9 June 1987 |
| Jul | 156.5 mm (6.2 in) | 18 July 1981 |
| Aug | 74.7 mm (2.9 in) | 23 August 2014 |
| Sep | 64.0 mm (2.5 in) | 21 September 1963 |
| Oct | 64.8 mm (2.6 in) | 29 October 2000 |
| Nov | 39.9 mm (1.6 in) | 13 November 1972 |
| Dec | 34.8 mm (1.4 in) | 30 December 2006 |
Period of Record Coverage
1949 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1949 | 332 | 91% | Yes |
| 1950 | 333 | 91% | Yes |
| 1951 | 319 | 87% | No |
| 1952 | 341 | 93% | Yes |
| 1953 | 353 | 97% | Yes |
| 1954 | 364 | 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 | 360 | 99% | 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 | 363 | 99% | Yes |
| 1976 | 339 | 93% | Yes |
| 1977 | 271 | 74% | No |
| 1978 | 294 | 81% | No |
| 1979 | 332 | 91% | Yes |
| 1980 | 321 | 88% | No |
| 1981 | 338 | 93% | Yes |
| 1982 | 332 | 91% | Yes |
| 1983 | 253 | 69% | No |
| 1984 | 355 | 97% | Yes |
| 1985 | 345 | 95% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 364 | 99% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 360 | 99% | Yes |
| 1992 | 362 | 99% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 361 | 99% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 360 | 99% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 363 | 99% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 303 | 83% | No |
| 2018 | 224 | 61% | No |
| 2019 | 364 | 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 | 282 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 12 October 2026 | Trenton Dam 1N, US | daily high min (Provisional) | 14.4 C (57.9 F) | 1.6 C (2.9 F) | 44 years | 23 of 100 (Routine) |
| 11 October 2026 | Trenton Dam 1N, US | daily high min (Provisional) | 13.9 C (57.0 F) | 0.6 C (1.1 F) | 65 years | 27 of 100 (Routine) |
| 11 October 2026 | Trenton Dam 1N, US | daily high max (Provisional) | 33.9 C (93.0 F) | 1.7 C (3.1 F) | 11 years | 12 of 100 (Routine) |
| 9 October 2026 | Trenton Dam 1N, US | daily high max (Provisional) | 33.9 C (93.0 F) | 0.6 C (1.1 F) | 72 years | 28 of 100 (Routine) |
| 1 October 2026 | Trenton Dam 1N, US | daily high min (Tie, Provisional) | 15.0 C (59.0 F) | tie | 55 years | 5 of 100 (Routine) |
| 29 September 2026 | Trenton Dam 1N, US | daily high min (Provisional) | 16.1 C (61.0 F) | 0.5 C (0.9 F) | 72 years | 29 of 100 (Routine) |
| 25 September 2026 | Trenton Dam 1N, US | daily high min (Provisional) | 14.4 C (57.9 F) | 0.5 C (0.9 F) | 11 years | 11 of 100 (Routine) |
| 8 September 2026 | Trenton Dam 1N, US | daily rain (Provisional) | 21.8 mm (0.9 in) | 8.1 mm (0.32 in) | 52 years | 20 of 100 (Routine) |
| 7 September 2026 | Trenton Dam 1N, US | daily high min (Tie, Provisional) | 18.9 C (66.0 F) | tie | 45 years | 5 of 100 (Routine) |
| 6 September 2026 | Trenton Dam 1N, US | daily rain (Provisional) | 11.2 mm (0.4 in) | 1.0 mm (0.04 in) | 31 years | 20 of 100 (Routine) |
| 29 August 2026 | Trenton Dam 1N, US | daily high min (Tie, Provisional) | 20.0 C (68.0 F) | tie | 56 years | 5 of 100 (Routine) |
| 12 August 2026 | Trenton Dam 1N, US | daily high max | 42.2 C (108.0 F) | 2.2 C (4.0 F) | 31 years | 20 of 100 (Routine) |
| 9 August 2026 | Trenton Dam 1N, US | daily high max (Tie) | 41.1 C (106.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 5 August 2026 | Trenton Dam 1N, US | daily low max | 19.4 C (66.9 F) | 0.6 C (1.1 F) | 35 years | 18 of 100 (Routine) |
| 28 July 2026 | Trenton Dam 1N, US | daily rain | 34.0 mm (1.3 in) | 5.3 mm (0.21 in) | 1 year | 13 of 100 (Routine) |
| 27 July 2026 | Trenton Dam 1N, US | daily high max (Tie) | 41.7 C (107.1 F) | tie | 73 years | 7 of 100 (Routine) |
| 24 June 2026 | Trenton Dam 1N, US | daily rain | 42.2 mm (1.7 in) | 12.5 mm (0.5 in) | 31 years | 29 of 100 (Routine) |
| 21 June 2026 | Trenton Dam 1N, US | daily rain | 52.8 mm (2.1 in) | 13.4 mm (0.5 in) | 64 years | 40 of 100 (Notable) |
| 22 May 2026 | Trenton Dam 1N, US | daily rain | 28.4 mm (1.1 in) | 0.5 mm (0.02 in) | 7 years | 12 of 100 (Routine) |
| 22 April 2026 | Trenton Dam 1N, US | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 68 years | 28 of 100 (Routine) |
Climate Trend
61 complete years, 1951 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1951 | 9.8 C | -1.01 C |
| 1952 | 11.2 C | +0.41 C |
| 1954 | 11.9 C | +1.16 C |
| 1955 | 10.1 C | -0.68 C |
| 1956 | 11.3 C | +0.53 C |
| 1957 | 10.3 C | -0.44 C |
| 1958 | 10.2 C | -0.56 C |
| 1959 | 10.3 C | -0.52 C |
| 1960 | 9.9 C | -0.85 C |
| 1961 | 10.0 C | -0.73 C |
| 1962 | 10.9 C | +0.16 C |
| 1963 | 11.8 C | +1.01 C |
| 1965 | 10.0 C | -0.74 C |
| 1966 | 9.7 C | -1.03 C |
| 1967 | 9.9 C | -0.91 C |
| 1968 | 9.8 C | -0.98 C |
| 1969 | 9.8 C | -1.00 C |
| 1970 | 10.3 C | -0.50 C |
| 1971 | 9.9 C | -0.90 C |
| 1972 | 9.4 C | -1.40 C |
| 1973 | 9.8 C | -0.96 C |
| 1974 | 10.5 C | -0.32 C |
| 1975 | 10.0 C | -0.78 C |
| 1979 | 9.7 C | -1.05 C |
| 1981 | 11.3 C | +0.55 C |
| 1982 | 9.6 C | -1.13 C |
| 1987 | 11.4 C | +0.59 C |
| 1988 | 10.7 C | -0.04 C |
| 1989 | 10.1 C | -0.64 C |
| 1990 | 11.2 C | +0.44 C |
| 1991 | 11.3 C | +0.48 C |
| 1992 | 10.3 C | -0.51 C |
| 1993 | 9.1 C | -1.70 C |
| 1994 | 11.2 C | +0.43 C |
| 1995 | 10.5 C | -0.31 C |
| 1996 | 9.7 C | -1.10 C |
| 1997 | 10.5 C | -0.26 C |
| 1998 | 11.6 C | +0.82 C |
| 1999 | 11.7 C | +0.88 C |
| 2000 | 11.5 C | +0.75 C |
| 2001 | 11.8 C | +1.06 C |
| 2002 | 11.5 C | +0.76 C |
| 2003 | 11.5 C | +0.74 C |
| 2004 | 11.1 C | +0.33 C |
| 2005 | 11.8 C | +1.04 C |
| 2006 | 11.9 C | +1.08 C |
| 2007 | 10.8 C | -0.01 C |
| 2008 | 10.4 C | -0.38 C |
| 2009 | 10.2 C | -0.55 C |
| 2010 | 11.3 C | +0.51 C |
| 2011 | 11.0 C | +0.26 C |
| 2012 | 13.1 C | +2.36 C |
| 2013 | 11.5 C | +0.69 C |
| 2014 | 11.3 C | +0.53 C |
| 2019 | 10.0 C | -0.74 C |
| 2020 | 11.6 C | +0.83 C |
| 2021 | 11.7 C | +0.89 C |
| 2022 | 11.3 C | +0.51 C |
| 2023 | 11.0 C | +0.18 C |
| 2024 | 12.3 C | +1.50 C |
| 2025 | 11.8 C | +1.01 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1951 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 61 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 | 0.3 F (0.2 to 0.5) per decade | 1951 to 2025 | 61 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.6) per decade | 1951 to 2025 | 61 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.1 to 0.4) per decade | 1951 to 2025 | 61 | 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
1919 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 43.9 C (111.0 F) | 1954 | 40.6 C (105.1 F) | 76 |
| Coldest night (TNn) | -35.0 C (-31.0 F) | 1989 | -24.4 C (-11.9 F) | 76 |
| Wettest day (Rx1day) | 156.5 mm (6.2 in) | 1981 | 47.8 mm (1.9 in) | 80 |
| Wettest five days (Rx5day) | 162.1 mm (6.4 in) | 2004 | 72.1 mm (2.8 in) | 80 |
| Longest dry spell (CDD) | 83 days | 1954 | 39 days | 80 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1919 | n/a |
| 1920 | n/a |
| 1949 | 37.2 C (99.0 F) |
| 1950 | 39.4 C (102.9 F) |
| 1951 | 37.8 C (100.0 F) |
| 1952 | 41.7 C (107.1 F) |
| 1953 | 42.8 C (109.0 F) |
| 1954 | 43.9 C (111.0 F) |
| 1955 | 40.6 C (105.1 F) |
| 1956 | 40.0 C (104.0 F) |
| 1957 | 39.4 C (102.9 F) |
| 1958 | 39.4 C (102.9 F) |
| 1959 | 40.6 C (105.1 F) |
| 1960 | 41.1 C (106.0 F) |
| 1961 | 40.6 C (105.1 F) |
| 1962 | 36.7 C (98.1 F) |
| 1963 | 41.7 C (107.1 F) |
| 1964 | 40.6 C (105.1 F) |
| 1965 | 39.4 C (102.9 F) |
| 1966 | 39.4 C (102.9 F) |
| 1967 | 38.9 C (102.0 F) |
| 1968 | 40.6 C (105.1 F) |
| 1969 | 42.2 C (108.0 F) |
| 1970 | 41.7 C (107.1 F) |
| 1971 | 40.6 C (105.1 F) |
| 1972 | 36.7 C (98.1 F) |
| 1973 | 41.7 C (107.1 F) |
| 1974 | 40.0 C (104.0 F) |
| 1975 | 38.9 C (102.0 F) |
| 1976 | 40.6 C (105.1 F) |
| 1977 | 42.2 C (108.0 F) |
| 1978 | 40.6 C (105.1 F) |
| 1979 | 37.8 C (100.0 F) |
| 1980 | 40.6 C (105.1 F) |
| 1981 | 40.0 C (104.0 F) |
| 1982 | 38.3 C (100.9 F) |
| 1983 | 41.1 C (106.0 F) |
| 1984 | 38.3 C (100.9 F) |
| 1985 | 40.6 C (105.1 F) |
| 1986 | 40.6 C (105.1 F) |
| 1987 | 40.6 C (105.1 F) |
| 1988 | 40.6 C (105.1 F) |
| 1989 | 40.0 C (104.0 F) |
| 1990 | 43.3 C (109.9 F) |
| 1991 | 40.6 C (105.1 F) |
| 1992 | 37.2 C (99.0 F) |
| 1993 | 38.3 C (100.9 F) |
| 1994 | 40.6 C (105.1 F) |
| 1995 | 41.7 C (107.1 F) |
| 1996 | 37.2 C (99.0 F) |
| 1997 | 38.9 C (102.0 F) |
| 1998 | 41.7 C (107.1 F) |
| 1999 | 38.3 C (100.9 F) |
| 2000 | 40.6 C (105.1 F) |
| 2001 | 42.2 C (108.0 F) |
| 2002 | 42.8 C (109.0 F) |
| 2003 | 43.3 C (109.9 F) |
| 2004 | 40.6 C (105.1 F) |
| 2005 | 43.3 C (109.9 F) |
| 2006 | 42.8 C (109.0 F) |
| 2007 | 41.7 C (107.1 F) |
| 2008 | 42.2 C (108.0 F) |
| 2009 | 38.3 C (100.9 F) |
| 2010 | 41.7 C (107.1 F) |
| 2011 | 41.1 C (106.0 F) |
| 2012 | 43.9 C (111.0 F) |
| 2013 | 41.7 C (107.1 F) |
| 2014 | 41.1 C (106.0 F) |
| 2015 | 41.1 C (106.0 F) |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | 40.0 C (104.0 F) |
| 2019 | 38.9 C (102.0 F) |
| 2020 | 39.4 C (102.9 F) |
| 2021 | 42.8 C (109.0 F) |
| 2022 | 43.9 C (111.0 F) |
| 2023 | 40.6 C (105.1 F) |
| 2024 | 40.6 C (105.1 F) |
| 2025 | 40.0 C (104.0 F) |
| 2026 | 42.2 C (108.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1919 | n/a |
| 1920 | n/a |
| 1949 | -19.4 C (-2.9 F) |
| 1950 | -30.0 C (-22.0 F) |
| 1951 | -30.0 C (-22.0 F) |
| 1952 | -26.7 C (-16.1 F) |
| 1953 | -20.6 C (-5.1 F) |
| 1954 | -20.6 C (-5.1 F) |
| 1955 | -22.8 C (-9.0 F) |
| 1956 | -21.1 C (-6.0 F) |
| 1957 | -23.9 C (-11.0 F) |
| 1958 | -18.9 C (-2.0 F) |
| 1959 | -29.4 C (-20.9 F) |
| 1960 | -31.7 C (-25.1 F) |
| 1961 | -27.8 C (-18.0 F) |
| 1962 | -24.4 C (-11.9 F) |
| 1963 | -27.2 C (-17.0 F) |
| 1964 | -22.8 C (-9.0 F) |
| 1965 | -25.0 C (-13.0 F) |
| 1966 | -26.1 C (-15.0 F) |
| 1967 | -24.4 C (-11.9 F) |
| 1968 | -27.2 C (-17.0 F) |
| 1969 | -24.4 C (-11.9 F) |
| 1970 | -21.7 C (-7.1 F) |
| 1971 | -26.1 C (-15.0 F) |
| 1972 | -26.7 C (-16.1 F) |
| 1973 | -24.4 C (-11.9 F) |
| 1974 | -30.0 C (-22.0 F) |
| 1975 | -22.2 C (-8.0 F) |
| 1976 | -23.9 C (-11.0 F) |
| 1977 | -23.3 C (-9.9 F) |
| 1978 | -27.2 C (-17.0 F) |
| 1979 | -27.2 C (-17.0 F) |
| 1980 | -24.4 C (-11.9 F) |
| 1981 | -25.6 C (-14.1 F) |
| 1982 | -28.9 C (-20.0 F) |
| 1983 | -30.0 C (-22.0 F) |
| 1984 | -31.1 C (-24.0 F) |
| 1985 | -25.6 C (-14.1 F) |
| 1986 | -21.7 C (-7.1 F) |
| 1987 | -17.2 C (1.0 F) |
| 1988 | -26.7 C (-16.1 F) |
| 1989 | -35.0 C (-31.0 F) |
| 1990 | -27.2 C (-17.0 F) |
| 1991 | -20.0 C (-4.0 F) |
| 1992 | -20.0 C (-4.0 F) |
| 1993 | -26.1 C (-15.0 F) |
| 1994 | -23.3 C (-9.9 F) |
| 1995 | -23.3 C (-9.9 F) |
| 1996 | -25.0 C (-13.0 F) |
| 1997 | -23.9 C (-11.0 F) |
| 1998 | -25.0 C (-13.0 F) |
| 1999 | -19.4 C (-2.9 F) |
| 2000 | -18.9 C (-2.0 F) |
| 2001 | -17.2 C (1.0 F) |
| 2002 | -22.2 C (-8.0 F) |
| 2003 | -24.4 C (-11.9 F) |
| 2004 | -26.7 C (-16.1 F) |
| 2005 | -25.6 C (-14.1 F) |
| 2006 | -21.1 C (-6.0 F) |
| 2007 | -23.9 C (-11.0 F) |
| 2008 | -23.9 C (-11.0 F) |
| 2009 | -22.2 C (-8.0 F) |
| 2010 | -23.9 C (-11.0 F) |
| 2011 | -25.6 C (-14.1 F) |
| 2012 | -23.9 C (-11.0 F) |
| 2013 | -21.7 C (-7.1 F) |
| 2014 | -24.4 C (-11.9 F) |
| 2015 | -24.4 C (-11.9 F) |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | -14.4 C (6.1 F) |
| 2019 | -23.3 C (-9.9 F) |
| 2020 | -19.4 C (-2.9 F) |
| 2021 | -31.1 C (-24.0 F) |
| 2022 | -27.2 C (-17.0 F) |
| 2023 | -21.7 C (-7.1 F) |
| 2024 | -28.3 C (-18.9 F) |
| 2025 | -29.4 C (-20.9 F) |
| 2026 | -22.2 C (-8.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1919 | 36.8 mm (1.4 in) |
| 1920 | 76.2 mm (3.0 in) |
| 1949 | 50.8 mm (2.0 in) |
| 1950 | 23.9 mm (0.9 in) |
| 1951 | 49.5 mm (1.9 in) |
| 1952 | 24.9 mm (1.0 in) |
| 1953 | 25.1 mm (1.0 in) |
| 1954 | 39.9 mm (1.6 in) |
| 1955 | 29.5 mm (1.2 in) |
| 1956 | 24.6 mm (1.0 in) |
| 1957 | 31.8 mm (1.3 in) |
| 1958 | 55.6 mm (2.2 in) |
| 1959 | 34.5 mm (1.4 in) |
| 1960 | 35.3 mm (1.4 in) |
| 1961 | 27.2 mm (1.1 in) |
| 1962 | 69.3 mm (2.7 in) |
| 1963 | 64.0 mm (2.5 in) |
| 1964 | 38.9 mm (1.5 in) |
| 1965 | 40.6 mm (1.6 in) |
| 1966 | 51.1 mm (2.0 in) |
| 1967 | 43.9 mm (1.7 in) |
| 1968 | 31.2 mm (1.2 in) |
| 1969 | 45.7 mm (1.8 in) |
| 1970 | 84.1 mm (3.3 in) |
| 1971 | 53.8 mm (2.1 in) |
| 1972 | 45.0 mm (1.8 in) |
| 1973 | 47.2 mm (1.9 in) |
| 1974 | 77.0 mm (3.0 in) |
| 1975 | 66.3 mm (2.6 in) |
| 1976 | 43.4 mm (1.7 in) |
| 1977 | 53.3 mm (2.1 in) |
| 1978 | 27.9 mm (1.1 in) |
| 1979 | 68.6 mm (2.7 in) |
| 1980 | 51.3 mm (2.0 in) |
| 1981 | 156.5 mm (6.2 in) |
| 1982 | 63.0 mm (2.5 in) |
| 1983 | 50.3 mm (2.0 in) |
| 1984 | 55.9 mm (2.2 in) |
| 1985 | 42.4 mm (1.7 in) |
| 1986 | 32.5 mm (1.3 in) |
| 1987 | 97.8 mm (3.9 in) |
| 1988 | 61.5 mm (2.4 in) |
| 1989 | 84.6 mm (3.3 in) |
| 1990 | 33.8 mm (1.3 in) |
| 1991 | 51.1 mm (2.0 in) |
| 1992 | 55.9 mm (2.2 in) |
| 1993 | 31.5 mm (1.2 in) |
| 1994 | 41.9 mm (1.6 in) |
| 1995 | 32.3 mm (1.3 in) |
| 1996 | 60.5 mm (2.4 in) |
| 1997 | 53.6 mm (2.1 in) |
| 1998 | 52.3 mm (2.1 in) |
| 1999 | 44.2 mm (1.7 in) |
| 2000 | 64.8 mm (2.6 in) |
| 2001 | 43.7 mm (1.7 in) |
| 2002 | 32.8 mm (1.3 in) |
| 2003 | 40.6 mm (1.6 in) |
| 2004 | 126.0 mm (5.0 in) |
| 2005 | 29.5 mm (1.2 in) |
| 2006 | 59.7 mm (2.4 in) |
| 2007 | 48.8 mm (1.9 in) |
| 2008 | 86.4 mm (3.4 in) |
| 2009 | 54.6 mm (2.1 in) |
| 2010 | 65.8 mm (2.6 in) |
| 2011 | 43.9 mm (1.7 in) |
| 2012 | 38.6 mm (1.5 in) |
| 2013 | 51.3 mm (2.0 in) |
| 2014 | 74.7 mm (2.9 in) |
| 2015 | 45.5 mm (1.8 in) |
| 2016 | 27.7 mm (1.1 in) |
| 2017 | 41.9 mm (1.6 in) |
| 2018 | 47.2 mm (1.9 in) |
| 2019 | 47.5 mm (1.9 in) |
| 2020 | 24.1 mm (0.9 in) |
| 2021 | 51.6 mm (2.0 in) |
| 2022 | 30.5 mm (1.2 in) |
| 2023 | 94.7 mm (3.7 in) |
| 2024 | 48.0 mm (1.9 in) |
| 2025 | 56.4 mm (2.2 in) |
| 2026 | 52.8 mm (2.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1919 | 82.5 mm (3.2 in) |
| 1920 | 79.2 mm (3.1 in) |
| 1949 | 75.0 mm (3.0 in) |
| 1950 | 34.1 mm (1.3 in) |
| 1951 | 85.8 mm (3.4 in) |
| 1952 | 40.9 mm (1.6 in) |
| 1953 | 52.9 mm (2.1 in) |
| 1954 | 69.9 mm (2.8 in) |
| 1955 | 51.6 mm (2.0 in) |
| 1956 | 33.5 mm (1.3 in) |
| 1957 | 71.7 mm (2.8 in) |
| 1958 | 94.9 mm (3.7 in) |
| 1959 | 50.6 mm (2.0 in) |
| 1960 | 57.9 mm (2.3 in) |
| 1961 | 46.7 mm (1.8 in) |
| 1962 | 98.3 mm (3.9 in) |
| 1963 | 89.4 mm (3.5 in) |
| 1964 | 79.2 mm (3.1 in) |
| 1965 | 87.6 mm (3.4 in) |
| 1966 | 72.4 mm (2.9 in) |
| 1967 | 64.3 mm (2.5 in) |
| 1968 | 43.9 mm (1.7 in) |
| 1969 | 78.0 mm (3.1 in) |
| 1970 | 100.4 mm (4.0 in) |
| 1971 | 87.1 mm (3.4 in) |
| 1972 | 97.9 mm (3.9 in) |
| 1973 | 86.8 mm (3.4 in) |
| 1974 | 112.9 mm (4.4 in) |
| 1975 | 76.9 mm (3.0 in) |
| 1976 | 51.8 mm (2.0 in) |
| 1977 | 76.6 mm (3.0 in) |
| 1978 | 33.2 mm (1.3 in) |
| 1979 | 129.0 mm (5.1 in) |
| 1980 | 89.6 mm (3.5 in) |
| 1981 | 160.3 mm (6.3 in) |
| 1982 | 76.2 mm (3.0 in) |
| 1983 | 53.9 mm (2.1 in) |
| 1984 | 83.3 mm (3.3 in) |
| 1985 | 54.1 mm (2.1 in) |
| 1986 | 42.4 mm (1.7 in) |
| 1987 | 110.5 mm (4.4 in) |
| 1988 | 95.1 mm (3.7 in) |
| 1989 | 92.2 mm (3.6 in) |
| 1990 | 62.5 mm (2.5 in) |
| 1991 | 69.9 mm (2.8 in) |
| 1992 | 68.3 mm (2.7 in) |
| 1993 | 72.7 mm (2.9 in) |
| 1994 | 95.0 mm (3.7 in) |
| 1995 | 40.7 mm (1.6 in) |
| 1996 | 101.2 mm (4.0 in) |
| 1997 | 70.9 mm (2.8 in) |
| 1998 | 63.0 mm (2.5 in) |
| 1999 | 68.6 mm (2.7 in) |
| 2000 | 75.4 mm (3.0 in) |
| 2001 | 57.9 mm (2.3 in) |
| 2002 | 43.9 mm (1.7 in) |
| 2003 | 48.2 mm (1.9 in) |
| 2004 | 162.1 mm (6.4 in) |
| 2005 | 62.4 mm (2.5 in) |
| 2006 | 73.6 mm (2.9 in) |
| 2007 | 110.2 mm (4.3 in) |
| 2008 | 105.2 mm (4.1 in) |
| 2009 | 87.9 mm (3.5 in) |
| 2010 | 90.5 mm (3.6 in) |
| 2011 | 62.0 mm (2.4 in) |
| 2012 | 44.2 mm (1.7 in) |
| 2013 | 53.9 mm (2.1 in) |
| 2014 | 109.5 mm (4.3 in) |
| 2015 | 67.6 mm (2.7 in) |
| 2016 | 27.7 mm (1.1 in) |
| 2017 | 14.7 mm (0.6 in) |
| 2018 | 71.4 mm (2.8 in) |
| 2019 | 65.8 mm (2.6 in) |
| 2020 | 39.8 mm (1.6 in) |
| 2021 | 63.0 mm (2.5 in) |
| 2022 | 66.0 mm (2.6 in) |
| 2023 | 129.7 mm (5.1 in) |
| 2024 | 75.5 mm (3.0 in) |
| 2025 | 60.2 mm (2.4 in) |
| 2026 | 139.4 mm (5.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1919 | 41 days |
| 1920 | 21 days |
| 1949 | 50 days |
| 1950 | 30 days |
| 1951 | 31 days |
| 1952 | 42 days |
| 1953 | 58 days |
| 1954 | 83 days |
| 1955 | 44 days |
| 1956 | 49 days |
| 1957 | 40 days |
| 1958 | 40 days |
| 1959 | 45 days |
| 1960 | 29 days |
| 1961 | 35 days |
| 1962 | 39 days |
| 1963 | 35 days |
| 1964 | 38 days |
| 1965 | 52 days |
| 1966 | 42 days |
| 1967 | 64 days |
| 1968 | 51 days |
| 1969 | 25 days |
| 1970 | 48 days |
| 1971 | 42 days |
| 1972 | 50 days |
| 1973 | 27 days |
| 1974 | 40 days |
| 1975 | 31 days |
| 1976 | 33 days |
| 1977 | 48 days |
| 1978 | 33 days |
| 1979 | 35 days |
| 1980 | 48 days |
| 1981 | 34 days |
| 1982 | 19 days |
| 1983 | 31 days |
| 1984 | 39 days |
| 1985 | 26 days |
| 1986 | 35 days |
| 1987 | 36 days |
| 1988 | 37 days |
| 1989 | 41 days |
| 1990 | 25 days |
| 1991 | 44 days |
| 1992 | 35 days |
| 1993 | 22 days |
| 1994 | 27 days |
| 1995 | 50 days |
| 1996 | 51 days |
| 1997 | 21 days |
| 1998 | 38 days |
| 1999 | 54 days |
| 2000 | 49 days |
| 2001 | 23 days |
| 2002 | 60 days |
| 2003 | 31 days |
| 2004 | 35 days |
| 2005 | 33 days |
| 2006 | 53 days |
| 2007 | 32 days |
| 2008 | 39 days |
| 2009 | 49 days |
| 2010 | 28 days |
| 2011 | 27 days |
| 2012 | 50 days |
| 2013 | 46 days |
| 2014 | 62 days |
| 2015 | 29 days |
| 2016 | 19 days |
| 2017 | 42 days |
| 2018 | 24 days |
| 2019 | 27 days |
| 2020 | 40 days |
| 2021 | 43 days |
| 2022 | 65 days |
| 2023 | 25 days |
| 2024 | 34 days |
| 2025 | 42 days |
| 2026 | 45 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
61 years with a frostAcross 61 years with a frost, the median last spring frost at Trenton Dam 1N falls on 3 May and the median first autumn frost on 12 October, which leaves a median of 163 days between them.
In 1992 to 2025 the median growing season was 166 days. That is 4 days more than in 1951 to 1990.
Fitted over all years, the growing season changes by +0.3 days per decade at this station.
| Measure | Median, all years | Earliest period (1951 to 1990) | Recent period (1992 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 3 May | 4 May | 2 May | 2 days earlier | -0.2 days per decade |
| First autumn frost | 12 October | 12 October | 13 October | 1 day later | +0.1 days per decade |
| Growing days | 163 days | 162 days | 166 days | 4 days more | +0.3 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
71 years, 1949 to 2025A day with at least 46.5 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 134.4 mm (5.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 46.5 mm (1.8 in) | |
| 5 years | 65.4 mm (2.6 in) | |
| 10 years | 79.6 mm (3.1 in) | |
| 25 years | 99.7 mm (3.9 in) | |
| 50 years | 116.3 mm (4.6 in) | |
| 100 years | 134.4 mm (5.3 in) | Longer than the 71 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, 71 years of values from 1949 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: 156.5 mm (6.2 in) in 1981; 126.0 mm (5.0 in) in 2004; 97.8 mm (3.9 in) in 1987.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Trenton Dam 1N, at 1974. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1974 ran 0.2 C (0.4 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1974 | +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.
Climate Twins
2007 to 2025 against 1961 to 1990Over 2007 to 2025, Trenton Dam 1N had a mean temperature of 11.3 C (52.3 F) and 487.5 mm (19.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Winona (United States, 127 km away), Norton 9SSE (United States, 116 km away) and Quinter (United States, 144 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Winona | United States | 127 km (79 mi) | 11.0 C (51.9 F) | 461.9 mm (18.2 in) | 0.81 |
| Norton 9SSE | United States | 116 km (72 mi) | 11.4 C (52.5 F) | 551.4 mm (21.7 in) | 0.82 |
| Quinter | United States | 144 km (89 mi) | 11.2 C (52.1 F) | 595.6 mm (23.4 in) | 0.85 |
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).