Dearborn Weather Records (USC00202015)
Record envelope, standing records and threshold days for Dearborn (USC00202015), Michigan, United States, with 75 years of record.
Key Facts for Dearborn
- Dearborn (USC00202015) is a weather station in Michigan, United States at 42.32 latitude and -83.24 longitude, 184 m (605 ft) above sea level.
- The station reports from 1952 to 2026, 75 years of record.
- 1,464 records set at Dearborn still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Dearborn set a daily record precipitation of 40.6 mm (1.6 in) on 2 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Michigan, United States, 42.32 latitude, -83.24 longitude.
- Elevation: 184 m (605 ft).
- Period of record: 1952 to 2026, 75 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
6 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 18.3 C (64.9 F) | -28.9 C (-20.0 F) | 15.6 C (60.1 F) | -23.9 C (-11.0 F) |
| Feb | 21.7 C (71.1 F) | -25.6 C (-14.1 F) | 13.9 C (57.0 F) | -16.7 C (1.9 F) |
| Mar | 30.0 C (86.0 F) | -22.8 C (-9.0 F) | 24.4 C (75.9 F) | -9.4 C (15.1 F) |
| Apr | 32.2 C (90.0 F) | -12.2 C (10.0 F) | 27.8 C (82.0 F) | -5.6 C (21.9 F) |
| May | 35.0 C (95.0 F) | -5.0 C (23.0 F) | 32.2 C (90.0 F) | 0.6 C (33.1 F) |
| Jun | 40.0 C (104.0 F) | 2.2 C (36.0 F) | 31.7 C (89.1 F) | 7.8 C (46.0 F) |
| Jul | 38.9 C (102.0 F) | 5.0 C (41.0 F) | 35.6 C (96.1 F) | 11.7 C (53.1 F) |
| Aug | 38.9 C (102.0 F) | 4.4 C (39.9 F) | 32.8 C (91.0 F) | 11.7 C (53.1 F) |
| Sep | 37.8 C (100.0 F) | -1.7 C (28.9 F) | 36.1 C (97.0 F) | 5.6 C (42.1 F) |
| Oct | 32.8 C (91.0 F) | -7.2 C (19.0 F) | 26.1 C (79.0 F) | 3.9 C (39.0 F) |
| Nov | 25.0 C (77.0 F) | -15.6 C (3.9 F) | n/a | n/a |
| Dec | 20.6 C (69.1 F) | -22.8 C (-9.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1952 | 10 |
| 1953 | 26 |
| 1954 | 24 |
| 1955 | 24 |
| 1956 | 15 |
| 1957 | 15 |
| 1958 | 12 |
| 1959 | 15 |
| 1960 | 16 |
| 1961 | 13 |
| 1962 | 27 |
| 1963 | 30 |
| 1964 | 21 |
| 1965 | 33 |
| 1966 | 26 |
| 1967 | 24 |
| 1968 | 22 |
| 1969 | 8 |
| 1970 | 13 |
| 1971 | 11 |
| 1972 | 14 |
| 1973 | 25 |
| 1974 | 23 |
| 1975 | 16 |
| 1976 | 29 |
| 1977 | 33 |
| 1978 | 22 |
| 1979 | 33 |
| 1980 | 19 |
| 1981 | 27 |
| 1982 | 30 |
| 1983 | 20 |
| 1984 | 28 |
| 1985 | 13 |
| 1986 | 25 |
| 1987 | 15 |
| 1988 | 32 |
| 1989 | 36 |
| 1990 | 28 |
| 1991 | 41 |
| 1992 | 22 |
| 1993 | 21 |
| 1994 | 26 |
| 1995 | 19 |
| 1996 | 14 |
| 1997 | 17 |
| 1998 | 18 |
| 1999 | 17 |
| 2000 | 18 |
| 2001 | 21 |
| 2002 | 17 |
| 2003 | 11 |
| 2004 | 12 |
| 2005 | 17 |
| 2006 | 15 |
| 2007 | 19 |
| 2008 | 11 |
| 2009 | 8 |
| 2010 | 2 |
| 2011 | 15 |
| 2012 | 17 |
| 2013 | 12 |
| 2014 | 33 |
| 2015 | 36 |
| 2016 | 20 |
| 2017 | 28 |
| 2018 | 21 |
| 2019 | 17 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 11 |
| 2023 | 14 |
| 2024 | 12 |
| 2025 | 14 |
| 2026 | 12 |
All-Time Record Progression
11 new records| Date | Kind | Detail |
|---|---|---|
| 1984-01-21 | Record low minimum temperature | Record low minimum temperature -27.2 C (-17.0 F) |
| 1984-01-22 | Record low maximum temperature | Record low maximum temperature -16.1 C (3.0 F) |
| 1988-06-26 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 1994-01-19 | Record low maximum temperature | Record low maximum temperature -16.7 C (1.9 F) |
| 1994-01-19 | Record low minimum temperature | Record low minimum temperature -28.9 C (-20.0 F) |
| 1994-01-20 | Record low maximum temperature | Record low maximum temperature -18.3 C (-0.9 F) |
| 1995-03-08 | Record daily precipitation | Record daily precipitation 127.3 mm (5.0 in) |
| 2014-08-12 | Record daily precipitation | Record daily precipitation 156.5 mm (6.2 in) |
| 2019-01-31 | Record low maximum temperature | Record low maximum temperature -19.4 C (-2.9 F) |
| 2021-06-26 | Record daily precipitation | Record daily precipitation 170.2 mm (6.7 in) |
| 2025-06-23 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
Wettest Day of Each Month
Jun: 170.2 mm (6.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 47.0 mm (1.9 in) | 31 January 2002 |
| Feb | 52.1 mm (2.1 in) | 25 February 1999 |
| Mar | 127.3 mm (5.0 in) | 8 March 1995 |
| Apr | 88.9 mm (3.5 in) | 7 April 2003 |
| May | 63.0 mm (2.5 in) | 26 May 2011 |
| Jun | 170.2 mm (6.7 in) | 26 June 2021 |
| Jul | 101.1 mm (4.0 in) | 8 July 1957 |
| Aug | 156.5 mm (6.2 in) | 12 August 2014 |
| Sep | 99.8 mm (3.9 in) | 7 September 1990 |
| Oct | 67.1 mm (2.6 in) | 1 October 1981 |
| Nov | 49.5 mm (1.9 in) | 16 November 2005 |
| Dec | 63.5 mm (2.5 in) | 25 December 1965 |
Period of Record Coverage
1952 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1952 | 140 | 38% | No |
| 1953 | 358 | 98% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 362 | 99% | Yes |
| 1956 | 362 | 99% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 356 | 98% | Yes |
| 1960 | 355 | 97% | Yes |
| 1961 | 354 | 97% | Yes |
| 1962 | 362 | 99% | Yes |
| 1963 | 353 | 97% | Yes |
| 1964 | 318 | 87% | No |
| 1965 | 326 | 89% | No |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 361 | 99% | Yes |
| 1974 | 358 | 98% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 363 | 99% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 334 | 92% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 332 | 91% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 333 | 91% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 362 | 99% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 365 | 100% | Yes |
| 1993 | 363 | 99% | Yes |
| 1994 | 359 | 98% | Yes |
| 1995 | 355 | 97% | Yes |
| 1996 | 299 | 82% | No |
| 1997 | 360 | 99% | Yes |
| 1998 | 362 | 99% | Yes |
| 1999 | 361 | 99% | Yes |
| 2000 | 362 | 99% | Yes |
| 2001 | 333 | 91% | Yes |
| 2002 | 333 | 91% | Yes |
| 2003 | 360 | 99% | Yes |
| 2004 | 344 | 94% | Yes |
| 2005 | 332 | 91% | Yes |
| 2006 | 327 | 90% | No |
| 2007 | 360 | 99% | Yes |
| 2008 | 329 | 90% | No |
| 2009 | 331 | 91% | Yes |
| 2010 | 230 | 63% | No |
| 2011 | 356 | 98% | Yes |
| 2012 | 339 | 93% | Yes |
| 2013 | 352 | 96% | Yes |
| 2014 | 354 | 97% | Yes |
| 2015 | 362 | 99% | Yes |
| 2016 | 361 | 99% | Yes |
| 2017 | 360 | 99% | Yes |
| 2018 | 355 | 97% | Yes |
| 2019 | 347 | 95% | Yes |
| 2020 | 96 | 26% | No |
| 2021 | 71 | 19% | No |
| 2022 | 356 | 98% | Yes |
| 2023 | 352 | 96% | Yes |
| 2024 | 308 | 84% | No |
| 2025 | 353 | 97% | Yes |
| 2026 | 272 | 75% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 2 October 2026 | Dearborn, US | daily rain (Provisional) | 40.6 mm (1.6 in) | 17.2 mm (0.7 in) | 19 years | 31 of 100 (Routine) |
| 3 September 2026 | Dearborn, US | daily high max (Tie, Provisional) | 36.1 C (97.0 F) | tie | 72 years | 7 of 100 (Routine) |
| 2 September 2026 | Dearborn, US | daily high min (Provisional) | 22.8 C (73.0 F) | 1.1 C (2.0 F) | 15 years | 13 of 100 (Routine) |
| 6 July 2026 | Dearborn, US | daily rain | 26.9 mm (1.1 in) | 7.6 mm (0.30 in) | 57 years | 30 of 100 (Routine) |
| 3 July 2026 | Dearborn, US | daily high min (Tie) | 23.9 C (75.0 F) | tie | 52 years | 5 of 100 (Routine) |
| 2 July 2026 | Dearborn, US | daily high min | 24.4 C (75.9 F) | 1.1 C (2.0 F) | 8 years | 12 of 100 (Routine) |
| 1 July 2026 | Dearborn, US | daily high min | 25.0 C (77.0 F) | 2.2 C (4.0 F) | 57 years | 30 of 100 (Routine) |
| 18 June 2026 | Dearborn, US | daily low max | 20.6 C (69.1 F) | 0.5 C (0.9 F) | 52 years | 23 of 100 (Routine) |
| 12 May 2026 | Dearborn, US | daily low min | 0.6 C (33.1 F) | 0.5 C (0.9 F) | 29 years | 16 of 100 (Routine) |
| 16 April 2026 | Dearborn, US | daily high min | 16.7 C (62.1 F) | 1.1 C (2.0 F) | 49 years | 23 of 100 (Routine) |
| 15 April 2026 | Dearborn, US | daily high min | 15.6 C (60.1 F) | 2.8 C (5.0 F) | 65 years | 31 of 100 (Routine) |
| 14 April 2026 | Dearborn, US | daily high min | 17.2 C (63.0 F) | 2.2 C (4.0 F) | 65 years | 30 of 100 (Routine) |
| 1 April 2026 | Dearborn, US | daily high max | 24.4 C (75.9 F) | 0.5 C (0.9 F) | 59 years | 24 of 100 (Routine) |
| 11 March 2026 | Dearborn, US | daily high max | 24.4 C (75.9 F) | 5.0 C (9.0 F) | 52 years | 29 of 100 (Routine) |
| 7 March 2026 | Dearborn, US | daily rain | 30.0 mm (1.2 in) | 7.1 mm (0.28 in) | 31 years | 23 of 100 (Routine) |
| 26 January 2026 | Dearborn, US | daily low max | -10.0 C (14.0 F) | 1.1 C (2.0 F) | 7 years | 10 of 100 (Routine) |
| 25 January 2026 | Dearborn, US | daily low min | -22.8 C (-9.0 F) | 0.6 C (1.1 F) | 39 years | 18 of 100 (Routine) |
| 10 January 2026 | Dearborn, US | daily high max | 15.6 C (60.1 F) | 5.6 C (10.1 F) | 6 years | 17 of 100 (Routine) |
| 5 December 2025 | Dearborn, US | daily low min | -16.1 C (3.0 F) | 2.2 C (4.0 F) | 34 years | 20 of 100 (Routine) |
| 5 December 2025 | Dearborn, US | daily low max | -4.4 C (24.1 F) | 1.6 C (2.9 F) | 36 years | 19 of 100 (Routine) |
Climate Trend
58 complete years, 1953 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1953 | 11.4 C | +1.48 C |
| 1954 | 10.6 C | +0.67 C |
| 1955 | 11.0 C | +1.08 C |
| 1956 | 10.3 C | +0.33 C |
| 1957 | 10.2 C | +0.28 C |
| 1958 | 9.6 C | -0.31 C |
| 1959 | 10.5 C | +0.54 C |
| 1960 | 9.9 C | 0.00 C |
| 1961 | 10.4 C | +0.44 C |
| 1962 | 9.7 C | -0.22 C |
| 1963 | 9.5 C | -0.49 C |
| 1964 | 10.3 C | +0.40 C |
| 1965 | 9.9 C | -0.03 C |
| 1966 | 10.1 C | +0.11 C |
| 1967 | 9.9 C | -0.02 C |
| 1968 | 10.5 C | +0.59 C |
| 1969 | 10.2 C | +0.24 C |
| 1970 | 10.6 C | +0.65 C |
| 1971 | 11.0 C | +1.01 C |
| 1972 | 9.8 C | -0.19 C |
| 1973 | 11.6 C | +1.65 C |
| 1974 | 10.0 C | +0.07 C |
| 1975 | 9.7 C | -0.29 C |
| 1976 | 8.5 C | -1.40 C |
| 1977 | 9.1 C | -0.88 C |
| 1978 | 8.4 C | -1.58 C |
| 1979 | 8.7 C | -1.28 C |
| 1980 | 8.8 C | -1.17 C |
| 1982 | 9.2 C | -0.73 C |
| 1984 | 9.4 C | -0.54 C |
| 1986 | 9.6 C | -0.30 C |
| 1987 | 10.4 C | +0.48 C |
| 1988 | 9.5 C | -0.40 C |
| 1989 | 8.6 C | -1.36 C |
| 1990 | 10.4 C | +0.44 C |
| 1991 | 10.8 C | +0.86 C |
| 1992 | 9.0 C | -0.97 C |
| 1993 | 9.2 C | -0.73 C |
| 1994 | 9.4 C | -0.59 C |
| 1995 | 9.6 C | -0.37 C |
| 1997 | 9.0 C | -0.97 C |
| 1998 | 11.7 C | +1.80 C |
| 1999 | 10.5 C | +0.59 C |
| 2000 | 9.8 C | -0.11 C |
| 2003 | 9.4 C | -0.58 C |
| 2007 | 10.8 C | +0.85 C |
| 2011 | 9.9 C | -0.02 C |
| 2012 | 11.3 C | +1.31 C |
| 2013 | 9.2 C | -0.73 C |
| 2014 | 8.3 C | -1.66 C |
| 2015 | 9.3 C | -0.63 C |
| 2016 | 10.7 C | +0.80 C |
| 2017 | 10.7 C | +0.74 C |
| 2018 | 9.9 C | 0.00 C |
| 2019 | 9.7 C | -0.23 C |
| 2022 | 10.1 C | +0.13 C |
| 2023 | 11.0 C | +1.03 C |
| 2025 | 10.2 C | +0.27 C |
The fitted trend in annual mean temperature here over 1953 to 2025 is -0.03 C (-0.13 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.2 to 0.1) 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 | -0.03 C (-0.13 to 0.07) per decade | -0.1 F (-0.2 to 0.1) per decade | 1953 to 2025 | 58 | Not clearly different from zero |
| Mean daily maximum | -0.1 C (-0.2 to 0.1) per decade | -0.1 F (-0.3 to 0.1) per decade | 1953 to 2025 | 58 | Not clearly different from zero |
| Mean daily minimum | 0.00 C (-0.11 to 0.10) per decade | -0.01 F (-0.20 to 0.18) per decade | 1953 to 2025 | 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
1952 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.0 C (104.0 F) | 1988 | 35.0 C (95.0 F) | 75 |
| Coldest night (TNn) | -28.9 C (-20.0 F) | 1994 | -20.6 C (-5.1 F) | 75 |
| Wettest day (Rx1day) | 170.2 mm (6.7 in) | 2021 | 48.3 mm (1.9 in) | 75 |
| Wettest five days (Rx5day) | 179.3 mm (7.1 in) | 2021 | 77.9 mm (3.1 in) | 75 |
| Longest dry spell (CDD) | 44 days | 1969 | 17 days | 75 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1952 | 34.4 C (93.9 F) |
| 1953 | 36.7 C (98.1 F) |
| 1954 | 37.2 C (99.0 F) |
| 1955 | 37.2 C (99.0 F) |
| 1956 | 35.0 C (95.0 F) |
| 1957 | 34.4 C (93.9 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 34.4 C (93.9 F) |
| 1960 | 34.4 C (93.9 F) |
| 1961 | 33.9 C (93.0 F) |
| 1962 | 33.9 C (93.0 F) |
| 1963 | 34.4 C (93.9 F) |
| 1964 | 35.0 C (95.0 F) |
| 1965 | 36.7 C (98.1 F) |
| 1966 | 37.8 C (100.0 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 35.6 C (96.1 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 35.0 C (95.0 F) |
| 1971 | 38.9 C (102.0 F) |
| 1972 | 36.7 C (98.1 F) |
| 1973 | 36.7 C (98.1 F) |
| 1974 | 36.7 C (98.1 F) |
| 1975 | 35.6 C (96.1 F) |
| 1976 | 37.2 C (99.0 F) |
| 1977 | 36.7 C (98.1 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 33.9 C (93.0 F) |
| 1980 | 34.4 C (93.9 F) |
| 1981 | 33.9 C (93.0 F) |
| 1982 | 32.8 C (91.0 F) |
| 1983 | 35.0 C (95.0 F) |
| 1984 | 35.0 C (95.0 F) |
| 1985 | 33.9 C (93.0 F) |
| 1986 | 35.0 C (95.0 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 40.0 C (104.0 F) |
| 1989 | 33.9 C (93.0 F) |
| 1990 | 36.1 C (97.0 F) |
| 1991 | 35.6 C (96.1 F) |
| 1992 | 33.9 C (93.0 F) |
| 1993 | 35.0 C (95.0 F) |
| 1994 | 36.7 C (98.1 F) |
| 1995 | 38.3 C (100.9 F) |
| 1996 | 34.4 C (93.9 F) |
| 1997 | 35.6 C (96.1 F) |
| 1998 | 36.1 C (97.0 F) |
| 1999 | 36.1 C (97.0 F) |
| 2000 | 32.8 C (91.0 F) |
| 2001 | 38.9 C (102.0 F) |
| 2002 | 37.8 C (100.0 F) |
| 2003 | 34.4 C (93.9 F) |
| 2004 | 33.3 C (91.9 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 36.1 C (97.0 F) |
| 2007 | 36.7 C (98.1 F) |
| 2008 | 35.0 C (95.0 F) |
| 2009 | 34.4 C (93.9 F) |
| 2010 | 35.6 C (96.1 F) |
| 2011 | 37.2 C (99.0 F) |
| 2012 | 38.9 C (102.0 F) |
| 2013 | 34.4 C (93.9 F) |
| 2014 | 32.2 C (90.0 F) |
| 2015 | 32.2 C (90.0 F) |
| 2016 | 35.6 C (96.1 F) |
| 2017 | 33.3 C (91.9 F) |
| 2018 | 34.4 C (93.9 F) |
| 2019 | 34.4 C (93.9 F) |
| 2020 | 22.2 C (72.0 F) |
| 2021 | 23.9 C (75.0 F) |
| 2022 | 35.6 C (96.1 F) |
| 2023 | 32.2 C (90.0 F) |
| 2024 | 33.9 C (93.0 F) |
| 2025 | 35.0 C (95.0 F) |
| 2026 | 36.1 C (97.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1952 | -11.1 C (12.0 F) |
| 1953 | -14.4 C (6.1 F) |
| 1954 | -15.0 C (5.0 F) |
| 1955 | -17.2 C (1.0 F) |
| 1956 | -14.4 C (6.1 F) |
| 1957 | -16.7 C (1.9 F) |
| 1958 | -21.7 C (-7.1 F) |
| 1959 | -18.9 C (-2.0 F) |
| 1960 | -22.2 C (-8.0 F) |
| 1961 | -19.4 C (-2.9 F) |
| 1962 | -22.2 C (-8.0 F) |
| 1963 | -26.1 C (-15.0 F) |
| 1964 | -18.9 C (-2.0 F) |
| 1965 | -18.9 C (-2.0 F) |
| 1966 | -20.6 C (-5.1 F) |
| 1967 | -19.4 C (-2.9 F) |
| 1968 | -20.6 C (-5.1 F) |
| 1969 | -20.6 C (-5.1 F) |
| 1970 | -22.2 C (-8.0 F) |
| 1971 | -22.2 C (-8.0 F) |
| 1972 | -25.0 C (-13.0 F) |
| 1973 | -19.4 C (-2.9 F) |
| 1974 | -17.8 C (0.0 F) |
| 1975 | -20.6 C (-5.1 F) |
| 1976 | -23.9 C (-11.0 F) |
| 1977 | -23.9 C (-11.0 F) |
| 1978 | -20.6 C (-5.1 F) |
| 1979 | -22.8 C (-9.0 F) |
| 1980 | -18.9 C (-2.0 F) |
| 1981 | -22.8 C (-9.0 F) |
| 1982 | -26.1 C (-15.0 F) |
| 1983 | -22.8 C (-9.0 F) |
| 1984 | -27.2 C (-17.0 F) |
| 1985 | -26.1 C (-15.0 F) |
| 1986 | -20.0 C (-4.0 F) |
| 1987 | -22.2 C (-8.0 F) |
| 1988 | -21.1 C (-6.0 F) |
| 1989 | -22.8 C (-9.0 F) |
| 1990 | -19.4 C (-2.9 F) |
| 1991 | -17.8 C (0.0 F) |
| 1992 | -20.0 C (-4.0 F) |
| 1993 | -20.0 C (-4.0 F) |
| 1994 | -28.9 C (-20.0 F) |
| 1995 | -19.4 C (-2.9 F) |
| 1996 | -22.8 C (-9.0 F) |
| 1997 | -22.2 C (-8.0 F) |
| 1998 | -14.4 C (6.1 F) |
| 1999 | -22.2 C (-8.0 F) |
| 2000 | -20.6 C (-5.1 F) |
| 2001 | -18.3 C (-0.9 F) |
| 2002 | -17.8 C (0.0 F) |
| 2003 | -22.8 C (-9.0 F) |
| 2004 | -20.6 C (-5.1 F) |
| 2005 | -20.6 C (-5.1 F) |
| 2006 | -15.0 C (5.0 F) |
| 2007 | -21.1 C (-6.0 F) |
| 2008 | -17.8 C (0.0 F) |
| 2009 | -25.0 C (-13.0 F) |
| 2010 | -16.7 C (1.9 F) |
| 2011 | -18.9 C (-2.0 F) |
| 2012 | -16.7 C (1.9 F) |
| 2013 | -18.3 C (-0.9 F) |
| 2014 | -26.1 C (-15.0 F) |
| 2015 | -25.6 C (-14.1 F) |
| 2016 | -18.3 C (-0.9 F) |
| 2017 | -21.7 C (-7.1 F) |
| 2018 | -21.1 C (-6.0 F) |
| 2019 | -26.1 C (-15.0 F) |
| 2020 | -16.7 C (1.9 F) |
| 2021 | -7.2 C (19.0 F) |
| 2022 | -20.0 C (-4.0 F) |
| 2023 | -15.6 C (3.9 F) |
| 2024 | -19.4 C (-2.9 F) |
| 2025 | -20.0 C (-4.0 F) |
| 2026 | -23.9 C (-11.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1952 | 34.3 mm (1.4 in) |
| 1953 | 40.1 mm (1.6 in) |
| 1954 | 65.0 mm (2.6 in) |
| 1955 | 35.8 mm (1.4 in) |
| 1956 | 70.9 mm (2.8 in) |
| 1957 | 101.1 mm (4.0 in) |
| 1958 | 32.5 mm (1.3 in) |
| 1959 | 50.8 mm (2.0 in) |
| 1960 | 43.7 mm (1.7 in) |
| 1961 | 50.8 mm (2.0 in) |
| 1962 | 43.2 mm (1.7 in) |
| 1963 | 39.6 mm (1.6 in) |
| 1964 | 51.3 mm (2.0 in) |
| 1965 | 63.5 mm (2.5 in) |
| 1966 | 48.5 mm (1.9 in) |
| 1967 | 42.7 mm (1.7 in) |
| 1968 | 59.4 mm (2.3 in) |
| 1969 | 37.8 mm (1.5 in) |
| 1970 | 38.6 mm (1.5 in) |
| 1971 | 41.9 mm (1.6 in) |
| 1972 | 75.7 mm (3.0 in) |
| 1973 | 46.7 mm (1.8 in) |
| 1974 | 48.3 mm (1.9 in) |
| 1975 | 50.3 mm (2.0 in) |
| 1976 | 44.2 mm (1.7 in) |
| 1977 | 49.0 mm (1.9 in) |
| 1978 | 33.3 mm (1.3 in) |
| 1979 | 39.6 mm (1.6 in) |
| 1980 | 39.9 mm (1.6 in) |
| 1981 | 67.1 mm (2.6 in) |
| 1982 | 29.7 mm (1.2 in) |
| 1983 | 49.8 mm (2.0 in) |
| 1984 | 41.9 mm (1.6 in) |
| 1985 | 45.5 mm (1.8 in) |
| 1986 | 46.7 mm (1.8 in) |
| 1987 | 74.9 mm (2.9 in) |
| 1988 | 32.3 mm (1.3 in) |
| 1989 | 44.7 mm (1.8 in) |
| 1990 | 99.8 mm (3.9 in) |
| 1991 | 60.7 mm (2.4 in) |
| 1992 | 50.8 mm (2.0 in) |
| 1993 | 50.8 mm (2.0 in) |
| 1994 | 39.4 mm (1.6 in) |
| 1995 | 127.3 mm (5.0 in) |
| 1996 | 39.4 mm (1.6 in) |
| 1997 | 50.0 mm (2.0 in) |
| 1998 | 58.9 mm (2.3 in) |
| 1999 | 52.1 mm (2.1 in) |
| 2000 | 63.5 mm (2.5 in) |
| 2001 | 40.6 mm (1.6 in) |
| 2002 | 47.0 mm (1.9 in) |
| 2003 | 88.9 mm (3.5 in) |
| 2004 | 48.3 mm (1.9 in) |
| 2005 | 49.5 mm (1.9 in) |
| 2006 | 46.7 mm (1.8 in) |
| 2007 | 43.4 mm (1.7 in) |
| 2008 | 53.8 mm (2.1 in) |
| 2009 | 38.1 mm (1.5 in) |
| 2010 | 29.5 mm (1.2 in) |
| 2011 | 63.0 mm (2.5 in) |
| 2012 | 43.2 mm (1.7 in) |
| 2013 | 78.7 mm (3.1 in) |
| 2014 | 156.5 mm (6.2 in) |
| 2015 | 53.6 mm (2.1 in) |
| 2016 | 55.6 mm (2.2 in) |
| 2017 | 46.5 mm (1.8 in) |
| 2018 | 81.3 mm (3.2 in) |
| 2019 | 54.4 mm (2.1 in) |
| 2020 | 69.3 mm (2.7 in) |
| 2021 | 170.2 mm (6.7 in) |
| 2022 | 40.4 mm (1.6 in) |
| 2023 | 31.5 mm (1.2 in) |
| 2024 | 40.4 mm (1.6 in) |
| 2025 | 36.8 mm (1.4 in) |
| 2026 | 40.6 mm (1.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1952 | 39.7 mm (1.6 in) |
| 1953 | 49.3 mm (1.9 in) |
| 1954 | 103.7 mm (4.1 in) |
| 1955 | 70.4 mm (2.8 in) |
| 1956 | 107.7 mm (4.2 in) |
| 1957 | 155.7 mm (6.1 in) |
| 1958 | 42.2 mm (1.7 in) |
| 1959 | 77.9 mm (3.1 in) |
| 1960 | 108.4 mm (4.3 in) |
| 1961 | 81.2 mm (3.2 in) |
| 1962 | 64.3 mm (2.5 in) |
| 1963 | 41.6 mm (1.6 in) |
| 1964 | 67.5 mm (2.7 in) |
| 1965 | 75.5 mm (3.0 in) |
| 1966 | 79.0 mm (3.1 in) |
| 1967 | 84.7 mm (3.3 in) |
| 1968 | 114.6 mm (4.5 in) |
| 1969 | 77.7 mm (3.1 in) |
| 1970 | 48.8 mm (1.9 in) |
| 1971 | 45.7 mm (1.8 in) |
| 1972 | 87.3 mm (3.4 in) |
| 1973 | 85.1 mm (3.4 in) |
| 1974 | 72.2 mm (2.8 in) |
| 1975 | 80.3 mm (3.2 in) |
| 1976 | 83.8 mm (3.3 in) |
| 1977 | 118.9 mm (4.7 in) |
| 1978 | 57.9 mm (2.3 in) |
| 1979 | 68.8 mm (2.7 in) |
| 1980 | 55.4 mm (2.2 in) |
| 1981 | 79.0 mm (3.1 in) |
| 1982 | 67.1 mm (2.6 in) |
| 1983 | 79.6 mm (3.1 in) |
| 1984 | 50.5 mm (2.0 in) |
| 1985 | 79.9 mm (3.1 in) |
| 1986 | 91.6 mm (3.6 in) |
| 1987 | 94.7 mm (3.7 in) |
| 1988 | 49.6 mm (2.0 in) |
| 1989 | 71.9 mm (2.8 in) |
| 1990 | 106.4 mm (4.2 in) |
| 1991 | 84.9 mm (3.3 in) |
| 1992 | 69.7 mm (2.7 in) |
| 1993 | 62.7 mm (2.5 in) |
| 1994 | 83.0 mm (3.3 in) |
| 1995 | 150.2 mm (5.9 in) |
| 1996 | 58.4 mm (2.3 in) |
| 1997 | 98.9 mm (3.9 in) |
| 1998 | 78.2 mm (3.1 in) |
| 1999 | 84.3 mm (3.3 in) |
| 2000 | 113.5 mm (4.5 in) |
| 2001 | 87.1 mm (3.4 in) |
| 2002 | 70.4 mm (2.8 in) |
| 2003 | 96.5 mm (3.8 in) |
| 2004 | 92.0 mm (3.6 in) |
| 2005 | 58.6 mm (2.3 in) |
| 2006 | 62.2 mm (2.4 in) |
| 2007 | 89.4 mm (3.5 in) |
| 2008 | 82.8 mm (3.3 in) |
| 2009 | 75.5 mm (3.0 in) |
| 2010 | 63.0 mm (2.5 in) |
| 2011 | 94.5 mm (3.7 in) |
| 2012 | 48.0 mm (1.9 in) |
| 2013 | 111.7 mm (4.4 in) |
| 2014 | 165.6 mm (6.5 in) |
| 2015 | 69.3 mm (2.7 in) |
| 2016 | 108.2 mm (4.3 in) |
| 2017 | 59.2 mm (2.3 in) |
| 2018 | 81.6 mm (3.2 in) |
| 2019 | 72.5 mm (2.9 in) |
| 2020 | 63.6 mm (2.5 in) |
| 2021 | 179.3 mm (7.1 in) |
| 2022 | 61.8 mm (2.4 in) |
| 2023 | 62.5 mm (2.5 in) |
| 2024 | 54.9 mm (2.2 in) |
| 2025 | 54.8 mm (2.2 in) |
| 2026 | 53.1 mm (2.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1952 | 32 days |
| 1953 | 36 days |
| 1954 | 19 days |
| 1955 | 27 days |
| 1956 | 19 days |
| 1957 | 23 days |
| 1958 | 30 days |
| 1959 | 19 days |
| 1960 | 21 days |
| 1961 | 17 days |
| 1962 | 24 days |
| 1963 | 40 days |
| 1964 | 20 days |
| 1965 | 15 days |
| 1966 | 24 days |
| 1967 | 20 days |
| 1968 | 18 days |
| 1969 | 44 days |
| 1970 | 17 days |
| 1971 | 13 days |
| 1972 | 20 days |
| 1973 | 27 days |
| 1974 | 20 days |
| 1975 | 15 days |
| 1976 | 26 days |
| 1977 | 15 days |
| 1978 | 16 days |
| 1979 | 17 days |
| 1980 | 17 days |
| 1981 | 15 days |
| 1982 | 16 days |
| 1983 | 19 days |
| 1984 | 14 days |
| 1985 | 15 days |
| 1986 | 16 days |
| 1987 | 15 days |
| 1988 | 20 days |
| 1989 | 22 days |
| 1990 | 16 days |
| 1991 | 14 days |
| 1992 | 14 days |
| 1993 | 14 days |
| 1994 | 30 days |
| 1995 | 20 days |
| 1996 | 14 days |
| 1997 | 12 days |
| 1998 | 21 days |
| 1999 | 21 days |
| 2000 | 13 days |
| 2001 | 19 days |
| 2002 | 22 days |
| 2003 | 15 days |
| 2004 | 22 days |
| 2005 | 17 days |
| 2006 | 14 days |
| 2007 | 24 days |
| 2008 | 14 days |
| 2009 | 14 days |
| 2010 | 11 days |
| 2011 | 13 days |
| 2012 | 12 days |
| 2013 | 13 days |
| 2014 | 14 days |
| 2015 | 14 days |
| 2016 | 17 days |
| 2017 | 20 days |
| 2018 | 19 days |
| 2019 | 11 days |
| 2020 | 11 days |
| 2021 | 26 days |
| 2022 | 17 days |
| 2023 | 22 days |
| 2024 | 27 days |
| 2025 | 16 days |
| 2026 | 22 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 Dearborn falls on 29 April and the median first autumn frost on 16 October, which leaves a median of 168 days between them.
Fitted over all years, the growing season changes by -0.2 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1982 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 29 April | n/a | 29 April | n/a | 0.0 days per decade |
| First autumn frost | 16 October | n/a | 14 October | n/a | -0.1 days per decade |
| Growing days | 168 days | n/a | 165 days | n/a | -0.2 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
68 years, 1953 to 2025A day with at least 47.7 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 169.9 mm (6.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 47.7 mm (1.9 in) | |
| 5 years | 64.4 mm (2.5 in) | |
| 10 years | 80.1 mm (3.2 in) | |
| 25 years | 107.3 mm (4.2 in) | |
| 50 years | 134.6 mm (5.3 in) | |
| 100 years | 169.9 mm (6.7 in) | Longer than the 68 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, 68 years of values from 1953 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: 170.2 mm (6.7 in) in 2021; 156.5 mm (6.2 in) in 2014; 127.3 mm (5.0 in) in 1995.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Dearborn, at 1966 and 1975. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1966 ran 0.4 C (0.7 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1975 ran 0.5 C (0.9 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1966 | +0.4 | +0.7 | likely | 5 |
| 1975 | -0.5 | -0.9 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2000 to 2025 against 1961 to 1990Over 2000 to 2025, Dearborn had a mean temperature of 10.0 C (50.0 F) and 908.6 mm (35.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Berwick (United States, 597 km away), Coshocton Ag Rsch STN (United States, 248 km away) and Kenton (United States, 188 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Berwick | United States | 597 km (371 mi) | 10.1 C (50.1 F) | 933.9 mm (36.8 in) | 0.53 |
| Coshocton Ag Rsch STN | United States | 248 km (154 mi) | 9.9 C (49.8 F) | 927.2 mm (36.5 in) | 0.54 |
| Kenton | United States | 188 km (117 mi) | 10.1 C (50.1 F) | 921.1 mm (36.3 in) | 0.56 |
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).