Detroit Willow Run AP Weather Records (USW00014853)
Record envelope, standing records and threshold days for Detroit Willow Run AP (USW00014853), Michigan, United States, with 79 years of record.
Key Facts for Detroit Willow Run AP
- Detroit Willow Run AP (USW00014853) is a weather station in Michigan, United States at 42.24 latitude and -83.53 longitude, 216 m (708 ft) above sea level.
- The station reports from 1948 to 2026, 79 years of record.
- 1,464 records set at Detroit Willow Run AP still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Detroit Willow Run AP set a daily record precipitation of 33.0 mm (1.3 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, 42.24 latitude, -83.53 longitude.
- Elevation: 216 m (708 ft).
- Period of record: 1948 to 2026, 79 years.
- Eligible elements: tmax, tmin, prcp.
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 | 20.6 C (69.1 F) | -27.1 C (-16.8 F) | 15.6 C (60.1 F) | -23.9 C (-11.0 F) |
| Feb | 22.8 C (73.0 F) | -27.7 C (-17.9 F) | 17.8 C (64.0 F) | -18.3 C (-0.9 F) |
| Mar | 31.7 C (89.1 F) | -21.7 C (-7.1 F) | 24.4 C (75.9 F) | -9.4 C (15.1 F) |
| Apr | 30.6 C (87.1 F) | -10.0 C (14.0 F) | 27.2 C (81.0 F) | -5.6 C (21.9 F) |
| May | 36.7 C (98.1 F) | -5.0 C (23.0 F) | 31.7 C (89.1 F) | 0.0 C (32.0 F) |
| Jun | 40.6 C (105.1 F) | 0.6 C (33.1 F) | 34.4 C (93.9 F) | 8.3 C (46.9 F) |
| Jul | 40.6 C (105.1 F) | 5.6 C (42.1 F) | 36.1 C (97.0 F) | 11.7 C (53.1 F) |
| Aug | 37.2 C (99.0 F) | 4.4 C (39.9 F) | 31.7 C (89.1 F) | 11.7 C (53.1 F) |
| Sep | 37.8 C (100.0 F) | -1.1 C (30.0 F) | 35.6 C (96.1 F) | 6.7 C (44.1 F) |
| Oct | 33.3 C (91.9 F) | -6.7 C (19.9 F) | 26.1 C (79.0 F) | 3.9 C (39.0 F) |
| Nov | 27.2 C (81.0 F) | -16.7 C (1.9 F) | n/a | n/a |
| Dec | 19.4 C (66.9 F) | -23.9 C (-11.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1948 | 27 |
| 1949 | 40 |
| 1950 | 46 |
| 1951 | 35 |
| 1952 | 28 |
| 1953 | 27 |
| 1954 | 23 |
| 1955 | 25 |
| 1956 | 32 |
| 1957 | 21 |
| 1958 | 26 |
| 1959 | 25 |
| 1960 | 15 |
| 1961 | 18 |
| 1962 | 43 |
| 1963 | 35 |
| 1964 | 44 |
| 1965 | 56 |
| 1966 | 38 |
| 1967 | 49 |
| 1968 | 19 |
| 1999 | 18 |
| 2000 | 38 |
| 2001 | 19 |
| 2002 | 33 |
| 2003 | 27 |
| 2004 | 24 |
| 2005 | 20 |
| 2006 | 22 |
| 2007 | 26 |
| 2008 | 19 |
| 2009 | 31 |
| 2010 | 13 |
| 2011 | 28 |
| 2012 | 59 |
| 2013 | 26 |
| 2014 | 33 |
| 2015 | 49 |
| 2016 | 45 |
| 2017 | 37 |
| 2018 | 35 |
| 2019 | 23 |
| 2020 | 26 |
| 2021 | 46 |
| 2022 | 19 |
| 2023 | 25 |
| 2024 | 22 |
| 2025 | 19 |
| 2026 | 10 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 2009-01-16 | Record low maximum temperature | Record low maximum temperature -17.7 C (0.1 F) |
| 2009-01-16 | Record low minimum temperature | Record low minimum temperature -27.1 C (-16.8 F) |
| 2011-07-02 | Record high maximum temperature | Record high maximum temperature 38.3 C (100.9 F) |
| 2011-07-21 | Record high maximum temperature | Record high maximum temperature 39.4 C (102.9 F) |
| 2012-06-28 | Record high maximum temperature | Record high maximum temperature 40.6 C (105.1 F) |
| 2012-07-07 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 2013-07-16 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 2015-02-20 | Record low minimum temperature | Record low minimum temperature -27.7 C (-17.9 F) |
| 2023-08-24 | Record daily precipitation | Record daily precipitation 147.6 mm (5.8 in) |
Wettest Day of Each Month
Aug: 147.6 mm (5.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 41.1 mm (1.6 in) | 12 January 1960 |
| Feb | 50.5 mm (2.0 in) | 16 February 1954 |
| Mar | 50.8 mm (2.0 in) | 25 March 1954 |
| Apr | 60.2 mm (2.4 in) | 20 April 2000 |
| May | 51.6 mm (2.0 in) | 26 May 1968 |
| Jun | 82.0 mm (3.2 in) | 25 June 1968 |
| Jul | 76.7 mm (3.0 in) | 30 July 2025 |
| Aug | 147.6 mm (5.8 in) | 24 August 2023 |
| Sep | 89.2 mm (3.5 in) | 11 September 2000 |
| Oct | 61.5 mm (2.4 in) | 3 October 1954 |
| Nov | 68.3 mm (2.7 in) | 15 November 2005 |
| Dec | 59.9 mm (2.4 in) | 21 December 1967 |
Period of Record Coverage
1948 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 274 | 75% | No |
| 1999 | 297 | 81% | No |
| 2000 | 360 | 98% | Yes |
| 2001 | 361 | 99% | Yes |
| 2002 | 360 | 99% | Yes |
| 2003 | 359 | 98% | Yes |
| 2004 | 360 | 98% | Yes |
| 2005 | 361 | 99% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 364 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 361 | 99% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 365 | 100% | Yes |
| 2017 | 364 | 100% | Yes |
| 2018 | 362 | 99% | Yes |
| 2019 | 362 | 99% | Yes |
| 2020 | 361 | 99% | Yes |
| 2021 | 356 | 98% | Yes |
| 2022 | 353 | 97% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 359 | 98% | Yes |
| 2025 | 322 | 88% | No |
| 2026 | 281 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 2 October 2026 | Detroit Willow Run AP, US | daily rain (Provisional) | 33.0 mm (1.3 in) | 18.0 mm (0.7 in) | 16 years | 31 of 100 (Routine) |
| 16 September 2026 | Detroit Willow Run AP, US | daily high min (Tie, Provisional) | 17.8 C (64.0 F) | tie | 8 years | 2 of 100 (Routine) |
| 15 September 2026 | Detroit Willow Run AP, US | daily rain (Provisional) | 14.5 mm (0.6 in) | 2.8 mm (0.11 in) | 68 years | 20 of 100 (Routine) |
| 5 July 2026 | Detroit Willow Run AP, US | daily rain | 36.3 mm (1.4 in) | 13.9 mm (0.5 in) | 13 years | 22 of 100 (Routine) |
| 1 July 2026 | Detroit Willow Run AP, US | daily high min | 24.4 C (75.9 F) | 1.6 C (2.9 F) | 8 years | 13 of 100 (Routine) |
| 23 May 2026 | Detroit Willow Run AP, US | daily low max | 13.9 C (57.0 F) | 0.5 C (0.9 F) | 63 years | 25 of 100 (Routine) |
| 6 May 2026 | Detroit Willow Run AP, US | daily low max (Tie) | 12.8 C (55.0 F) | tie | 59 years | 6 of 100 (Routine) |
| 15 April 2026 | Detroit Willow Run AP, US | daily high min | 15.6 C (60.1 F) | 0.6 C (1.1 F) | 13 years | 12 of 100 (Routine) |
| 14 April 2026 | Detroit Willow Run AP, US | daily high min | 16.1 C (61.0 F) | 2.8 C (5.0 F) | 65 years | 32 of 100 (Routine) |
| 13 April 2026 | Detroit Willow Run AP, US | daily high min | 15.6 C (60.1 F) | 2.3 C (4.1 F) | 4 years | 13 of 100 (Routine) |
| 31 March 2026 | Detroit Willow Run AP, US | daily high max | 24.4 C (75.9 F) | 1.1 C (2.0 F) | 59 years | 25 of 100 (Routine) |
| 30 March 2026 | Detroit Willow Run AP, US | daily high max (Tie) | 23.3 C (73.9 F) | tie | 4 years | 2 of 100 (Routine) |
| 11 March 2026 | Detroit Willow Run AP, US | daily rain | 18.8 mm (0.7 in) | 6.6 mm (0.26 in) | 73 years | 20 of 100 (Routine) |
| 10 March 2026 | Detroit Willow Run AP, US | daily high max | 24.4 C (75.9 F) | 1.6 C (2.9 F) | 4 years | 10 of 100 (Routine) |
| 6 March 2026 | Detroit Willow Run AP, US | daily rain | 24.4 mm (1.0 in) | 9.9 mm (0.39 in) | 67 years | 20 of 100 (Routine) |
| 18 February 2026 | Detroit Willow Run AP, US | daily high min (Tie) | 2.8 C (37.0 F) | tie | 15 years | 2 of 100 (Routine) |
| 17 February 2026 | Detroit Willow Run AP, US | daily high max | 12.8 C (55.0 F) | 0.6 C (1.1 F) | 15 years | 12 of 100 (Routine) |
| 19 January 2026 | Detroit Willow Run AP, US | daily low min | -17.2 C (1.0 F) | 0.1 C (0.2 F) | 16 years | 12 of 100 (Routine) |
| 9 January 2026 | Detroit Willow Run AP, US | daily high max | 15.6 C (60.1 F) | 2.8 C (5.0 F) | 76 years | 34 of 100 (Routine) |
| 29 December 2025 | Detroit Willow Run AP, US | daily high max (Tie) | 12.2 C (54.0 F) | tie | 3 years | 1 of 100 (Routine) |
Climate Trend
45 complete years, 1948 to 2024| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1948 | 9.7 C | -0.31 C |
| 1949 | 10.8 C | +0.80 C |
| 1950 | 8.8 C | -1.16 C |
| 1951 | 9.2 C | -0.78 C |
| 1952 | 10.4 C | +0.37 C |
| 1953 | 10.9 C | +0.90 C |
| 1954 | 10.0 C | +0.05 C |
| 1955 | 10.5 C | +0.56 C |
| 1956 | 9.6 C | -0.35 C |
| 1957 | 9.7 C | -0.32 C |
| 1958 | 9.2 C | -0.82 C |
| 1959 | 10.0 C | +0.01 C |
| 1960 | 9.4 C | -0.56 C |
| 1961 | 9.6 C | -0.41 C |
| 1962 | 9.1 C | -0.85 C |
| 1963 | 8.6 C | -1.36 C |
| 1964 | 9.4 C | -0.54 C |
| 1965 | 8.2 C | -1.76 C |
| 1966 | 8.2 C | -1.81 C |
| 1967 | 8.2 C | -1.76 C |
| 2000 | 8.8 C | -1.15 C |
| 2001 | 9.9 C | -0.07 C |
| 2002 | 9.7 C | -0.25 C |
| 2003 | 8.4 C | -1.60 C |
| 2004 | 9.0 C | -1.00 C |
| 2005 | 9.4 C | -0.56 C |
| 2006 | 10.4 C | +0.37 C |
| 2007 | 9.4 C | -0.58 C |
| 2008 | 8.8 C | -1.23 C |
| 2009 | 8.7 C | -1.31 C |
| 2010 | 10.5 C | +0.48 C |
| 2011 | 10.5 C | +0.55 C |
| 2012 | 12.5 C | +2.53 C |
| 2013 | 10.4 C | +0.46 C |
| 2014 | 9.6 C | -0.38 C |
| 2015 | 11.1 C | +1.16 C |
| 2016 | 12.4 C | +2.37 C |
| 2017 | 11.2 C | +1.26 C |
| 2018 | 11.0 C | +1.01 C |
| 2019 | 10.7 C | +0.71 C |
| 2020 | 11.7 C | +1.69 C |
| 2021 | 12.2 C | +2.26 C |
| 2022 | 10.8 C | +0.82 C |
| 2023 | 10.8 C | +0.80 C |
| 2024 | 11.7 C | +1.70 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1948 to 2024. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 45 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 (0.1 to 0.5) per decade | 1948 to 2024 | 45 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.6) per decade | 1948 to 2024 | 45 | Rise |
| Mean daily minimum | 0.14 C (0.03 to 0.26) per decade | 0.3 F (0.1 to 0.5) per decade | 1948 to 2024 | 45 | 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
1948 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.6 C (105.1 F) | 2012 | 35.6 C (96.1 F) | 49 |
| Coldest night (TNn) | -27.7 C (-17.9 F) | 2015 | -20.6 C (-5.1 F) | 49 |
| Wettest day (Rx1day) | 147.6 mm (5.8 in) | 2023 | 49.0 mm (1.9 in) | 49 |
| Wettest five days (Rx5day) | 148.1 mm (5.8 in) | 2023 | 75.4 mm (3.0 in) | 49 |
| Longest dry spell (CDD) | 38 days | 2026 | 20 days | 49 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1948 | 37.2 C (99.0 F) |
| 1949 | 36.7 C (98.1 F) |
| 1950 | 34.4 C (93.9 F) |
| 1951 | 35.0 C (95.0 F) |
| 1952 | 36.7 C (98.1 F) |
| 1953 | 37.8 C (100.0 F) |
| 1954 | 37.8 C (100.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 36.1 C (97.0 F) |
| 1957 | 35.6 C (96.1 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 35.0 C (95.0 F) |
| 1960 | 34.4 C (93.9 F) |
| 1961 | 35.6 C (96.1 F) |
| 1962 | 35.6 C (96.1 F) |
| 1963 | 35.6 C (96.1 F) |
| 1964 | 37.2 C (99.0 F) |
| 1965 | 34.4 C (93.9 F) |
| 1966 | 36.7 C (98.1 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 34.4 C (93.9 F) |
| 1999 | 33.9 C (93.0 F) |
| 2000 | 32.2 C (90.0 F) |
| 2001 | 37.2 C (99.0 F) |
| 2002 | 36.7 C (98.1 F) |
| 2003 | 33.3 C (91.9 F) |
| 2004 | 32.8 C (91.0 F) |
| 2005 | 35.6 C (96.1 F) |
| 2006 | 35.6 C (96.1 F) |
| 2007 | 35.0 C (95.0 F) |
| 2008 | 34.4 C (93.9 F) |
| 2009 | 34.4 C (93.9 F) |
| 2010 | 35.6 C (96.1 F) |
| 2011 | 39.4 C (102.9 F) |
| 2012 | 40.6 C (105.1 F) |
| 2013 | 36.1 C (97.0 F) |
| 2014 | 35.6 C (96.1 F) |
| 2015 | 36.1 C (97.0 F) |
| 2016 | 37.8 C (100.0 F) |
| 2017 | 36.1 C (97.0 F) |
| 2018 | 36.7 C (98.1 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 36.7 C (98.1 F) |
| 2021 | 34.4 C (93.9 F) |
| 2022 | 37.2 C (99.0 F) |
| 2023 | 33.3 C (91.9 F) |
| 2024 | 35.6 C (96.1 F) |
| 2025 | 36.1 C (97.0 F) |
| 2026 | 36.1 C (97.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1948 | -22.2 C (-8.0 F) |
| 1949 | -16.7 C (1.9 F) |
| 1950 | -20.6 C (-5.1 F) |
| 1951 | -22.8 C (-9.0 F) |
| 1952 | -13.3 C (8.1 F) |
| 1953 | -15.0 C (5.0 F) |
| 1954 | -16.1 C (3.0 F) |
| 1955 | -19.4 C (-2.9 F) |
| 1956 | -14.4 C (6.1 F) |
| 1957 | -21.1 C (-6.0 F) |
| 1958 | -21.7 C (-7.1 F) |
| 1959 | -20.6 C (-5.1 F) |
| 1960 | -23.9 C (-11.0 F) |
| 1961 | -21.7 C (-7.1 F) |
| 1962 | -20.6 C (-5.1 F) |
| 1963 | -25.0 C (-13.0 F) |
| 1964 | -18.9 C (-2.0 F) |
| 1965 | -20.6 C (-5.1 F) |
| 1966 | -21.1 C (-6.0 F) |
| 1967 | -20.6 C (-5.1 F) |
| 1968 | -21.1 C (-6.0 F) |
| 1999 | -14.4 C (6.1 F) |
| 2000 | -21.7 C (-7.1 F) |
| 2001 | -17.2 C (1.0 F) |
| 2002 | -18.9 C (-2.0 F) |
| 2003 | -21.7 C (-7.1 F) |
| 2004 | -25.0 C (-13.0 F) |
| 2005 | -24.4 C (-11.9 F) |
| 2006 | -16.0 C (3.2 F) |
| 2007 | -22.1 C (-7.8 F) |
| 2008 | -18.8 C (-1.8 F) |
| 2009 | -27.1 C (-16.8 F) |
| 2010 | -18.2 C (-0.8 F) |
| 2011 | -23.2 C (-9.8 F) |
| 2012 | -16.0 C (3.2 F) |
| 2013 | -18.8 C (-1.8 F) |
| 2014 | -24.9 C (-12.8 F) |
| 2015 | -27.7 C (-17.9 F) |
| 2016 | -19.9 C (-3.8 F) |
| 2017 | -21.6 C (-6.9 F) |
| 2018 | -21.6 C (-6.9 F) |
| 2019 | -26.0 C (-14.8 F) |
| 2020 | -16.6 C (2.1 F) |
| 2021 | -21.6 C (-6.9 F) |
| 2022 | -21.0 C (-5.8 F) |
| 2023 | -17.7 C (0.1 F) |
| 2024 | -20.5 C (-4.9 F) |
| 2025 | -19.9 C (-3.8 F) |
| 2026 | -23.9 C (-11.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 41.7 mm (1.6 in) |
| 1949 | 59.2 mm (2.3 in) |
| 1950 | 42.2 mm (1.7 in) |
| 1951 | 58.9 mm (2.3 in) |
| 1952 | 33.8 mm (1.3 in) |
| 1953 | 47.8 mm (1.9 in) |
| 1954 | 61.5 mm (2.4 in) |
| 1955 | 46.7 mm (1.8 in) |
| 1956 | 56.4 mm (2.2 in) |
| 1957 | 42.7 mm (1.7 in) |
| 1958 | 48.5 mm (1.9 in) |
| 1959 | 51.6 mm (2.0 in) |
| 1960 | 41.1 mm (1.6 in) |
| 1961 | 55.1 mm (2.2 in) |
| 1962 | 33.0 mm (1.3 in) |
| 1963 | 27.2 mm (1.1 in) |
| 1964 | 51.8 mm (2.0 in) |
| 1965 | 58.2 mm (2.3 in) |
| 1966 | 67.8 mm (2.7 in) |
| 1967 | 59.9 mm (2.4 in) |
| 1968 | 82.0 mm (3.2 in) |
| 1999 | 34.3 mm (1.4 in) |
| 2000 | 89.2 mm (3.5 in) |
| 2001 | 46.2 mm (1.8 in) |
| 2002 | 42.9 mm (1.7 in) |
| 2003 | 36.1 mm (1.4 in) |
| 2004 | 46.0 mm (1.8 in) |
| 2005 | 68.3 mm (2.7 in) |
| 2006 | 35.6 mm (1.4 in) |
| 2007 | 37.8 mm (1.5 in) |
| 2008 | 55.9 mm (2.2 in) |
| 2009 | 34.0 mm (1.3 in) |
| 2010 | 54.4 mm (2.1 in) |
| 2011 | 53.1 mm (2.1 in) |
| 2012 | 30.2 mm (1.2 in) |
| 2013 | 62.2 mm (2.4 in) |
| 2014 | 49.0 mm (1.9 in) |
| 2015 | 30.2 mm (1.2 in) |
| 2016 | 41.7 mm (1.6 in) |
| 2017 | 42.4 mm (1.7 in) |
| 2018 | 63.0 mm (2.5 in) |
| 2019 | 51.6 mm (2.0 in) |
| 2020 | 58.9 mm (2.3 in) |
| 2021 | 59.4 mm (2.3 in) |
| 2022 | 30.2 mm (1.2 in) |
| 2023 | 147.6 mm (5.8 in) |
| 2024 | 56.9 mm (2.2 in) |
| 2025 | 76.7 mm (3.0 in) |
| 2026 | 36.3 mm (1.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 75.4 mm (3.0 in) |
| 1949 | 76.7 mm (3.0 in) |
| 1950 | 71.3 mm (2.8 in) |
| 1951 | 80.5 mm (3.2 in) |
| 1952 | 60.2 mm (2.4 in) |
| 1953 | 53.3 mm (2.1 in) |
| 1954 | 107.0 mm (4.2 in) |
| 1955 | 59.9 mm (2.4 in) |
| 1956 | 97.6 mm (3.8 in) |
| 1957 | 79.0 mm (3.1 in) |
| 1958 | 63.1 mm (2.5 in) |
| 1959 | 69.2 mm (2.7 in) |
| 1960 | 85.1 mm (3.4 in) |
| 1961 | 78.9 mm (3.1 in) |
| 1962 | 51.5 mm (2.0 in) |
| 1963 | 50.6 mm (2.0 in) |
| 1964 | 62.2 mm (2.4 in) |
| 1965 | 73.4 mm (2.9 in) |
| 1966 | 79.5 mm (3.1 in) |
| 1967 | 71.4 mm (2.8 in) |
| 1968 | 132.3 mm (5.2 in) |
| 1999 | 68.8 mm (2.7 in) |
| 2000 | 135.7 mm (5.3 in) |
| 2001 | 76.0 mm (3.0 in) |
| 2002 | 63.0 mm (2.5 in) |
| 2003 | 59.0 mm (2.3 in) |
| 2004 | 82.6 mm (3.3 in) |
| 2005 | 72.3 mm (2.8 in) |
| 2006 | 101.2 mm (4.0 in) |
| 2007 | 69.1 mm (2.7 in) |
| 2008 | 93.6 mm (3.7 in) |
| 2009 | 80.3 mm (3.2 in) |
| 2010 | 102.5 mm (4.0 in) |
| 2011 | 126.7 mm (5.0 in) |
| 2012 | 44.2 mm (1.7 in) |
| 2013 | 72.3 mm (2.8 in) |
| 2014 | 60.7 mm (2.4 in) |
| 2015 | 57.7 mm (2.3 in) |
| 2016 | 84.6 mm (3.3 in) |
| 2017 | 50.3 mm (2.0 in) |
| 2018 | 84.1 mm (3.3 in) |
| 2019 | 76.8 mm (3.0 in) |
| 2020 | 82.1 mm (3.2 in) |
| 2021 | 104.4 mm (4.1 in) |
| 2022 | 54.1 mm (2.1 in) |
| 2023 | 148.1 mm (5.8 in) |
| 2024 | 73.2 mm (2.9 in) |
| 2025 | 90.9 mm (3.6 in) |
| 2026 | 60.7 mm (2.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 25 days |
| 1949 | 21 days |
| 1950 | 16 days |
| 1951 | 15 days |
| 1952 | 25 days |
| 1953 | 29 days |
| 1954 | 19 days |
| 1955 | 27 days |
| 1956 | 14 days |
| 1957 | 24 days |
| 1958 | 20 days |
| 1959 | 18 days |
| 1960 | 17 days |
| 1961 | 25 days |
| 1962 | 18 days |
| 1963 | 32 days |
| 1964 | 20 days |
| 1965 | 15 days |
| 1966 | 19 days |
| 1967 | 26 days |
| 1968 | 17 days |
| 1999 | 23 days |
| 2000 | 16 days |
| 2001 | 18 days |
| 2002 | 22 days |
| 2003 | 21 days |
| 2004 | 24 days |
| 2005 | 17 days |
| 2006 | 15 days |
| 2007 | 20 days |
| 2008 | 18 days |
| 2009 | 22 days |
| 2010 | 20 days |
| 2011 | 12 days |
| 2012 | 16 days |
| 2013 | 20 days |
| 2014 | 20 days |
| 2015 | 31 days |
| 2016 | 21 days |
| 2017 | 31 days |
| 2018 | 14 days |
| 2019 | 20 days |
| 2020 | 22 days |
| 2021 | 24 days |
| 2022 | 28 days |
| 2023 | 16 days |
| 2024 | 27 days |
| 2025 | 24 days |
| 2026 | 38 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
45 years with a frostAcross 45 years with a frost, the median last spring frost at Detroit Willow Run AP falls on 29 April and the median first autumn frost on 20 October, which leaves a median of 170 days between them.
Fitted over all years, the growing season changes by -0.5 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1963 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 29 April | n/a | 1 May | n/a | +0.8 days per decade |
| First autumn frost | 20 October | n/a | 19 October | n/a | +0.3 days per decade |
| Growing days | 170 days | n/a | 165 days | n/a | -0.5 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
45 years, 1948 to 2024A day with at least 47.9 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 108.9 mm (4.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 47.9 mm (1.9 in) | |
| 5 years | 62.5 mm (2.5 in) | |
| 10 years | 72.8 mm (2.9 in) | |
| 25 years | 86.7 mm (3.4 in) | |
| 50 years | 97.6 mm (3.8 in) | Longer than the 45 years of record |
| 100 years | 108.9 mm (4.3 in) | Longer than the 45 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, 45 years of values from 1948 to 2024.
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: 147.6 mm (5.8 in) in 2023; 89.2 mm (3.5 in) in 2000; 68.3 mm (2.7 in) in 2005.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Detroit Willow Run AP, at 1964 and 2011. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1964 ran 0.8 C (1.4 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2011 ran 0.9 C (1.6 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1964 | -0.7 | -1.3 | likely | 5 |
| 2011 | +0.9 | +1.6 | 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).