Uw Arboretum - Madison Weather Records (USC00470273)
Record envelope, standing records and threshold days for Uw Arboretum - Madison (USC00470273), Wisconsin, United States, with 56 years of record.
Key Facts for Uw Arboretum - Madison
- Uw Arboretum - Madison (USC00470273) is a weather station in Wisconsin, United States at 43.04 latitude and -89.43 longitude, 265 m (870 ft) above sea level.
- The station reports from 1971 to 2026, 56 years of record.
- 1,464 records set at Uw Arboretum - Madison still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Uw Arboretum - Madison set a daily record precipitation of 33.8 mm (1.3 in) on 1 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Wisconsin, United States, 43.04 latitude, -89.43 longitude.
- Elevation: 265 m (870 ft).
- Period of record: 1971 to 2026, 56 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
12 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 15.0 C (59.0 F) | -36.1 C (-33.0 F) | 12.8 C (55.0 F) | -28.9 C (-20.0 F) |
| Feb | 22.8 C (73.0 F) | -38.9 C (-38.0 F) | 18.3 C (64.9 F) | -20.0 C (-4.0 F) |
| Mar | 28.3 C (82.9 F) | -24.4 C (-11.9 F) | 25.6 C (78.1 F) | -16.7 C (1.9 F) |
| Apr | 35.0 C (95.0 F) | -20.6 C (-5.1 F) | 26.7 C (80.1 F) | -5.6 C (21.9 F) |
| May | 35.0 C (95.0 F) | -5.6 C (21.9 F) | 30.6 C (87.1 F) | -1.7 C (28.9 F) |
| Jun | 40.0 C (104.0 F) | -1.7 C (28.9 F) | 32.2 C (90.0 F) | 4.4 C (39.9 F) |
| Jul | 39.4 C (102.9 F) | 2.2 C (36.0 F) | 36.7 C (98.1 F) | 8.3 C (46.9 F) |
| Aug | 42.2 C (108.0 F) | 0.0 C (32.0 F) | 29.4 C (84.9 F) | 8.3 C (46.9 F) |
| Sep | 37.2 C (99.0 F) | -6.7 C (19.9 F) | 31.1 C (88.0 F) | 4.4 C (39.9 F) |
| Oct | 33.9 C (93.0 F) | -13.9 C (7.0 F) | 21.7 C (71.1 F) | 3.3 C (37.9 F) |
| Nov | 25.0 C (77.0 F) | -25.6 C (-14.1 F) | n/a | n/a |
| Dec | 20.6 C (69.1 F) | -33.3 C (-27.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1971 | 6 |
| 1972 | 34 |
| 1973 | 24 |
| 1974 | 34 |
| 1975 | 30 |
| 1976 | 60 |
| 1977 | 47 |
| 1978 | 22 |
| 1979 | 42 |
| 1980 | 19 |
| 1981 | 18 |
| 1982 | 43 |
| 1983 | 40 |
| 1984 | 27 |
| 1985 | 24 |
| 1986 | 23 |
| 1987 | 26 |
| 1988 | 55 |
| 1989 | 32 |
| 1990 | 28 |
| 1991 | 45 |
| 1992 | 28 |
| 1993 | 16 |
| 1994 | 23 |
| 1995 | 26 |
| 1996 | 22 |
| 1997 | 24 |
| 1998 | 22 |
| 1999 | 18 |
| 2000 | 31 |
| 2001 | 28 |
| 2002 | 23 |
| 2003 | 16 |
| 2004 | 17 |
| 2005 | 13 |
| 2006 | 18 |
| 2007 | 27 |
| 2008 | 13 |
| 2009 | 17 |
| 2010 | 14 |
| 2011 | 16 |
| 2012 | 45 |
| 2013 | 19 |
| 2014 | 32 |
| 2015 | 26 |
| 2016 | 21 |
| 2017 | 27 |
| 2018 | 18 |
| 2019 | 23 |
| 2020 | 18 |
| 2021 | 25 |
| 2022 | 25 |
| 2023 | 27 |
| 2024 | 33 |
| 2025 | 16 |
| 2026 | 18 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 2008-02-07 | Record daily snowfall | Record daily snowfall 33.0 cm (13.0 in) |
| 2008-02-07 | Record snow depth | Record snow depth 53.3 cm (21.0 in) |
| 2011-07-18 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 2012-12-20 | Record daily snowfall | Record daily snowfall 34.3 cm (13.5 in) |
| 2018-08-21 | Record daily precipitation | Record daily precipitation 152.7 mm (6.0 in) |
| 2019-01-31 | Record low maximum temperature | Record low maximum temperature -24.4 C (-11.9 F) |
Wettest Day of Each Month
Aug: 152.7 mm (6.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 32.8 mm (1.3 in) | 27 January 1974 |
| Feb | 40.6 mm (1.6 in) | 1 February 1986 |
| Mar | 72.4 mm (2.9 in) | 31 March 1998 |
| Apr | 71.4 mm (2.8 in) | 23 April 1999 |
| May | 81.3 mm (3.2 in) | 23 May 2004 |
| Jun | 124.0 mm (4.9 in) | 16 June 2018 |
| Jul | 112.5 mm (4.4 in) | 18 July 1977 |
| Aug | 152.7 mm (6.0 in) | 21 August 2018 |
| Sep | 88.9 mm (3.5 in) | 24 September 1994 |
| Oct | 80.5 mm (3.2 in) | 2 October 2019 |
| Nov | 76.7 mm (3.0 in) | 4 November 2003 |
| Dec | 68.6 mm (2.7 in) | 14 December 1984 |
Period of Record Coverage
1971 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1971 | 86 | 24% | No |
| 1972 | 365 | 100% | Yes |
| 1973 | 362 | 99% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 362 | 99% | Yes |
| 1976 | 358 | 98% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 360 | 99% | Yes |
| 1980 | 333 | 91% | Yes |
| 1981 | 363 | 99% | Yes |
| 1982 | 360 | 99% | Yes |
| 1983 | 352 | 96% | Yes |
| 1984 | 360 | 98% | Yes |
| 1985 | 359 | 98% | Yes |
| 1986 | 357 | 98% | Yes |
| 1987 | 360 | 99% | Yes |
| 1988 | 332 | 91% | Yes |
| 1989 | 363 | 99% | Yes |
| 1990 | 359 | 98% | Yes |
| 1991 | 360 | 99% | Yes |
| 1992 | 358 | 98% | Yes |
| 1993 | 355 | 97% | Yes |
| 1994 | 350 | 96% | Yes |
| 1995 | 349 | 96% | Yes |
| 1996 | 341 | 93% | Yes |
| 1997 | 352 | 96% | Yes |
| 1998 | 351 | 96% | Yes |
| 1999 | 356 | 98% | Yes |
| 2000 | 353 | 96% | Yes |
| 2001 | 353 | 97% | Yes |
| 2002 | 341 | 93% | Yes |
| 2003 | 345 | 95% | Yes |
| 2004 | 331 | 90% | Yes |
| 2005 | 293 | 80% | No |
| 2006 | 350 | 96% | Yes |
| 2007 | 353 | 97% | Yes |
| 2008 | 353 | 96% | Yes |
| 2009 | 359 | 98% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 364 | 100% | Yes |
| 2014 | 361 | 99% | Yes |
| 2015 | 362 | 99% | Yes |
| 2016 | 356 | 97% | Yes |
| 2017 | 354 | 97% | Yes |
| 2018 | 361 | 99% | Yes |
| 2019 | 357 | 98% | Yes |
| 2020 | 354 | 97% | Yes |
| 2021 | 355 | 97% | Yes |
| 2022 | 358 | 98% | Yes |
| 2023 | 360 | 99% | Yes |
| 2024 | 364 | 99% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 268 | 73% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 1 October 2026 | Uw Arboretum - Madison, US | daily rain (Provisional) | 33.8 mm (1.3 in) | 4.1 mm (0.16 in) | 8 years | 10 of 100 (Routine) |
| 19 September 2026 | Uw Arboretum - Madison, US | daily rain (Provisional) | 83.8 mm (3.3 in) | 65.8 mm (2.6 in) | 24 years | 52 of 100 (Notable) |
| 9 September 2026 | Uw Arboretum - Madison, US | daily high min (Tie, Provisional) | 17.2 C (63.0 F) | tie | 12 years | 2 of 100 (Routine) |
| 1 August 2026 | Uw Arboretum - Madison, US | daily rain | 73.9 mm (2.9 in) | 63.5 mm (2.5 in) | 31 years | 54 of 100 (Notable) |
| 28 July 2026 | Uw Arboretum - Madison, US | daily high max | 36.7 C (98.1 F) | 1.1 C (2.0 F) | 37 years | 19 of 100 (Routine) |
| 27 July 2026 | Uw Arboretum - Madison, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 23 years | 2 of 100 (Routine) |
| 1 July 2026 | Uw Arboretum - Madison, US | daily high min | 23.9 C (75.0 F) | 2.8 C (5.0 F) | 24 years | 19 of 100 (Routine) |
| 30 June 2026 | Uw Arboretum - Madison, US | daily high min (Tie) | 24.4 C (75.9 F) | tie | 8 years | 1 of 100 (Routine) |
| 29 June 2026 | Uw Arboretum - Madison, US | daily high min (Tie) | 21.1 C (70.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 15 April 2026 | Uw Arboretum - Madison, US | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 49 years | 19 of 100 (Routine) |
| 14 April 2026 | Uw Arboretum - Madison, US | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 1 year | 5 of 100 (Routine) |
| 13 April 2026 | Uw Arboretum - Madison, US | daily high min | 14.4 C (57.9 F) | 1.1 C (2.0 F) | 48 years | 21 of 100 (Routine) |
| 31 March 2026 | Uw Arboretum - Madison, US | daily high max | 25.6 C (78.1 F) | 3.4 C (6.1 F) | 27 years | 17 of 100 (Routine) |
| 18 March 2026 | Uw Arboretum - Madison, US | daily snow depth | 17.8 cm (7.0 in) | 5.1 cm (2.0 in) | 12 years | 14 of 100 (Routine) |
| 18 March 2026 | Uw Arboretum - Madison, US | daily low max (Tie) | -4.4 C (24.1 F) | tie | 32 years | 3 of 100 (Routine) |
| 17 March 2026 | Uw Arboretum - Madison, US | daily low max | -4.4 C (24.1 F) | 1.6 C (2.9 F) | 49 years | 21 of 100 (Routine) |
| 17 March 2026 | Uw Arboretum - Madison, US | daily snow depth | 17.8 cm (7.0 in) | 5.1 cm (2.0 in) | 28 years | 19 of 100 (Routine) |
| 17 March 2026 | Uw Arboretum - Madison, US | daily low min | -16.7 C (1.9 F) | 2.3 C (4.1 F) | 32 years | 17 of 100 (Routine) |
| 16 March 2026 | Uw Arboretum - Madison, US | daily snowfall | 22.6 cm (8.9 in) | 15.5 cm (6.1 in) | 4 years | 33 of 100 (Routine) |
| 16 March 2026 | Uw Arboretum - Madison, US | daily snow depth | 22.9 cm (9.0 in) | 7.7 cm (3.0 in) | 28 years | 23 of 100 (Routine) |
Climate Trend
49 complete years, 1972 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1972 | 6.2 C | -1.80 C |
| 1973 | 8.6 C | +0.63 C |
| 1974 | 7.3 C | -0.73 C |
| 1975 | 7.5 C | -0.50 C |
| 1977 | 7.1 C | -0.91 C |
| 1978 | 6.5 C | -1.48 C |
| 1979 | 6.1 C | -1.92 C |
| 1981 | 7.7 C | -0.34 C |
| 1982 | 6.6 C | -1.44 C |
| 1983 | 7.8 C | -0.22 C |
| 1984 | 7.5 C | -0.55 C |
| 1985 | 6.9 C | -1.15 C |
| 1986 | 7.7 C | -0.34 C |
| 1987 | 9.2 C | +1.18 C |
| 1989 | 7.0 C | -1.05 C |
| 1990 | 8.6 C | +0.63 C |
| 1991 | 8.5 C | +0.47 C |
| 1992 | 7.5 C | -0.47 C |
| 1993 | 7.0 C | -1.01 C |
| 1994 | 7.2 C | -0.81 C |
| 1995 | 7.2 C | -0.81 C |
| 1996 | 6.1 C | -1.87 C |
| 1997 | 6.9 C | -1.10 C |
| 1998 | 9.5 C | +1.44 C |
| 1999 | 8.9 C | +0.87 C |
| 2000 | 8.3 C | +0.30 C |
| 2001 | 9.0 C | +1.01 C |
| 2002 | 8.8 C | +0.74 C |
| 2003 | 7.8 C | -0.19 C |
| 2004 | 8.1 C | +0.08 C |
| 2006 | 8.9 C | +0.91 C |
| 2007 | 8.6 C | +0.56 C |
| 2008 | 7.1 C | -0.92 C |
| 2009 | 7.4 C | -0.64 C |
| 2010 | 8.8 C | +0.81 C |
| 2011 | 8.3 C | +0.29 C |
| 2012 | 10.2 C | +2.14 C |
| 2013 | 7.1 C | -0.93 C |
| 2014 | 6.4 C | -1.65 C |
| 2015 | 8.6 C | +0.58 C |
| 2016 | 9.5 C | +1.44 C |
| 2018 | 8.3 C | +0.24 C |
| 2019 | 7.9 C | -0.12 C |
| 2020 | 9.4 C | +1.42 C |
| 2021 | 9.6 C | +1.58 C |
| 2022 | 8.3 C | +0.28 C |
| 2023 | 10.0 C | +2.00 C |
| 2024 | 10.6 C | +2.55 C |
| 2025 | 9.0 C | +0.96 C |
The annual mean temperature here has risen by 0.4 C (0.2 to 0.6) per decade over 1972 to 2025. In Fahrenheit: 0.7 F (0.4 to 1.0) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.4 C (0.2 to 0.6) per decade | 0.7 F (0.4 to 1.0) per decade | 1972 to 2025 | 49 | Rise |
| Mean daily maximum | 0.18 C (-0.01 to 0.36) per decade | 0.32 F (-0.02 to 0.65) per decade | 1972 to 2025 | 49 | Not clearly different from zero |
| Mean daily minimum | 0.6 C (0.4 to 0.8) per decade | 1.1 F (0.8 to 1.5) per decade | 1972 to 2025 | 49 | 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
1971 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.2 C (108.0 F) | 1988 | 35.0 C (95.0 F) | 56 |
| Coldest night (TNn) | -38.9 C (-38.0 F) | 1996 | -26.4 C (-15.5 F) | 56 |
| Wettest day (Rx1day) | 152.7 mm (6.0 in) | 2018 | 64.0 mm (2.5 in) | 56 |
| Wettest five days (Rx5day) | 200.1 mm (7.9 in) | 2013 | 98.6 mm (3.9 in) | 56 |
| Longest dry spell (CDD) | 41 days | 1995 | 20 days | 56 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1971 | 31.1 C (88.0 F) |
| 1972 | 34.4 C (93.9 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 35.0 C (95.0 F) |
| 1975 | 33.3 C (91.9 F) |
| 1976 | 37.8 C (100.0 F) |
| 1977 | 37.2 C (99.0 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 33.9 C (93.0 F) |
| 1980 | 36.7 C (98.1 F) |
| 1981 | 34.4 C (93.9 F) |
| 1982 | 33.9 C (93.0 F) |
| 1983 | 37.2 C (99.0 F) |
| 1984 | 34.4 C (93.9 F) |
| 1985 | 35.0 C (95.0 F) |
| 1986 | 34.4 C (93.9 F) |
| 1987 | 36.7 C (98.1 F) |
| 1988 | 42.2 C (108.0 F) |
| 1989 | 37.2 C (99.0 F) |
| 1990 | 35.6 C (96.1 F) |
| 1991 | 36.1 C (97.0 F) |
| 1992 | 35.0 C (95.0 F) |
| 1993 | 35.6 C (96.1 F) |
| 1994 | 37.2 C (99.0 F) |
| 1995 | 37.8 C (100.0 F) |
| 1996 | 32.8 C (91.0 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 33.3 C (91.9 F) |
| 1999 | 36.1 C (97.0 F) |
| 2000 | 33.9 C (93.0 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 35.6 C (96.1 F) |
| 2003 | 35.6 C (96.1 F) |
| 2004 | 31.7 C (89.1 F) |
| 2005 | 35.6 C (96.1 F) |
| 2006 | 34.4 C (93.9 F) |
| 2007 | 33.9 C (93.0 F) |
| 2008 | 32.8 C (91.0 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 32.8 C (91.0 F) |
| 2011 | 36.1 C (97.0 F) |
| 2012 | 39.4 C (102.9 F) |
| 2013 | 35.0 C (95.0 F) |
| 2014 | 32.2 C (90.0 F) |
| 2015 | 33.3 C (91.9 F) |
| 2016 | 32.2 C (90.0 F) |
| 2017 | 33.3 C (91.9 F) |
| 2018 | 35.0 C (95.0 F) |
| 2019 | 32.8 C (91.0 F) |
| 2020 | 35.0 C (95.0 F) |
| 2021 | 36.1 C (97.0 F) |
| 2022 | 35.0 C (95.0 F) |
| 2023 | 37.2 C (99.0 F) |
| 2024 | 34.4 C (93.9 F) |
| 2025 | 32.8 C (91.0 F) |
| 2026 | 36.7 C (98.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1971 | -18.9 C (-2.0 F) |
| 1972 | -32.8 C (-27.0 F) |
| 1973 | -27.2 C (-17.0 F) |
| 1974 | -28.9 C (-20.0 F) |
| 1975 | -26.7 C (-16.1 F) |
| 1976 | -30.0 C (-22.0 F) |
| 1977 | -30.6 C (-23.1 F) |
| 1978 | -28.3 C (-18.9 F) |
| 1979 | -36.1 C (-33.0 F) |
| 1980 | -27.2 C (-17.0 F) |
| 1981 | -25.6 C (-14.1 F) |
| 1982 | -34.4 C (-29.9 F) |
| 1983 | -33.3 C (-27.9 F) |
| 1984 | -32.2 C (-26.0 F) |
| 1985 | -33.3 C (-27.9 F) |
| 1986 | -29.4 C (-20.9 F) |
| 1987 | -26.1 C (-15.0 F) |
| 1988 | -33.9 C (-29.0 F) |
| 1989 | -28.9 C (-20.0 F) |
| 1990 | -27.8 C (-18.0 F) |
| 1991 | -28.3 C (-18.9 F) |
| 1992 | -23.3 C (-9.9 F) |
| 1993 | -25.6 C (-14.1 F) |
| 1994 | -33.9 C (-29.0 F) |
| 1995 | -25.0 C (-13.0 F) |
| 1996 | -38.9 C (-38.0 F) |
| 1997 | -25.0 C (-13.0 F) |
| 1998 | -22.8 C (-9.0 F) |
| 1999 | -31.1 C (-24.0 F) |
| 2000 | -28.3 C (-18.9 F) |
| 2001 | -22.2 C (-8.0 F) |
| 2002 | -24.4 C (-11.9 F) |
| 2003 | -22.8 C (-9.0 F) |
| 2004 | -25.0 C (-13.0 F) |
| 2005 | -22.8 C (-9.0 F) |
| 2006 | -27.8 C (-18.0 F) |
| 2007 | -26.1 C (-15.0 F) |
| 2008 | -26.1 C (-15.0 F) |
| 2009 | -30.6 C (-23.1 F) |
| 2010 | -22.8 C (-9.0 F) |
| 2011 | -26.1 C (-15.0 F) |
| 2012 | -23.3 C (-9.9 F) |
| 2013 | -26.1 C (-15.0 F) |
| 2014 | -28.9 C (-20.0 F) |
| 2015 | -25.6 C (-14.1 F) |
| 2016 | -23.3 C (-9.9 F) |
| 2017 | -23.3 C (-9.9 F) |
| 2018 | -25.0 C (-13.0 F) |
| 2019 | -33.9 C (-29.0 F) |
| 2020 | -25.6 C (-14.1 F) |
| 2021 | -25.6 C (-14.1 F) |
| 2022 | -26.7 C (-16.1 F) |
| 2023 | -24.4 C (-11.9 F) |
| 2024 | -25.6 C (-14.1 F) |
| 2025 | -25.6 C (-14.1 F) |
| 2026 | -28.9 C (-20.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1971 | 68.8 mm (2.7 in) |
| 1972 | 68.6 mm (2.7 in) |
| 1973 | 63.8 mm (2.5 in) |
| 1974 | 49.8 mm (2.0 in) |
| 1975 | 78.0 mm (3.1 in) |
| 1976 | 38.1 mm (1.5 in) |
| 1977 | 112.5 mm (4.4 in) |
| 1978 | 77.7 mm (3.1 in) |
| 1979 | 42.7 mm (1.7 in) |
| 1980 | 49.5 mm (1.9 in) |
| 1981 | 61.7 mm (2.4 in) |
| 1982 | 42.2 mm (1.7 in) |
| 1983 | 45.7 mm (1.8 in) |
| 1984 | 71.1 mm (2.8 in) |
| 1985 | 52.1 mm (2.1 in) |
| 1986 | 58.2 mm (2.3 in) |
| 1987 | 40.6 mm (1.6 in) |
| 1988 | 47.2 mm (1.9 in) |
| 1989 | 38.6 mm (1.5 in) |
| 1990 | 55.9 mm (2.2 in) |
| 1991 | 96.0 mm (3.8 in) |
| 1992 | 39.4 mm (1.6 in) |
| 1993 | 101.6 mm (4.0 in) |
| 1994 | 88.9 mm (3.5 in) |
| 1995 | 43.4 mm (1.7 in) |
| 1996 | 104.4 mm (4.1 in) |
| 1997 | 66.0 mm (2.6 in) |
| 1998 | 72.4 mm (2.9 in) |
| 1999 | 71.4 mm (2.8 in) |
| 2000 | 63.5 mm (2.5 in) |
| 2001 | 152.4 mm (6.0 in) |
| 2002 | 42.4 mm (1.7 in) |
| 2003 | 85.3 mm (3.4 in) |
| 2004 | 81.3 mm (3.2 in) |
| 2005 | 30.2 mm (1.2 in) |
| 2006 | 56.1 mm (2.2 in) |
| 2007 | 51.1 mm (2.0 in) |
| 2008 | 73.9 mm (2.9 in) |
| 2009 | 64.0 mm (2.5 in) |
| 2010 | 94.7 mm (3.7 in) |
| 2011 | 33.0 mm (1.3 in) |
| 2012 | 46.5 mm (1.8 in) |
| 2013 | 84.3 mm (3.3 in) |
| 2014 | 57.2 mm (2.3 in) |
| 2015 | 59.4 mm (2.3 in) |
| 2016 | 96.5 mm (3.8 in) |
| 2017 | 85.1 mm (3.4 in) |
| 2018 | 152.7 mm (6.0 in) |
| 2019 | 80.5 mm (3.2 in) |
| 2020 | 69.6 mm (2.7 in) |
| 2021 | 53.6 mm (2.1 in) |
| 2022 | 59.4 mm (2.3 in) |
| 2023 | 77.2 mm (3.0 in) |
| 2024 | 122.2 mm (4.8 in) |
| 2025 | 64.0 mm (2.5 in) |
| 2026 | 83.8 mm (3.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1971 | 81.0 mm (3.2 in) |
| 1972 | 95.3 mm (3.8 in) |
| 1973 | 85.6 mm (3.4 in) |
| 1974 | 66.3 mm (2.6 in) |
| 1975 | 96.1 mm (3.8 in) |
| 1976 | 105.8 mm (4.2 in) |
| 1977 | 186.9 mm (7.4 in) |
| 1978 | 163.0 mm (6.4 in) |
| 1979 | 93.7 mm (3.7 in) |
| 1980 | 90.1 mm (3.5 in) |
| 1981 | 101.5 mm (4.0 in) |
| 1982 | 62.2 mm (2.4 in) |
| 1983 | 66.0 mm (2.6 in) |
| 1984 | 112.3 mm (4.4 in) |
| 1985 | 99.6 mm (3.9 in) |
| 1986 | 92.5 mm (3.6 in) |
| 1987 | 76.3 mm (3.0 in) |
| 1988 | 72.4 mm (2.9 in) |
| 1989 | 88.9 mm (3.5 in) |
| 1990 | 97.1 mm (3.8 in) |
| 1991 | 100.0 mm (3.9 in) |
| 1992 | 79.7 mm (3.1 in) |
| 1993 | 176.0 mm (6.9 in) |
| 1994 | 142.5 mm (5.6 in) |
| 1995 | 55.9 mm (2.2 in) |
| 1996 | 177.8 mm (7.0 in) |
| 1997 | 80.9 mm (3.2 in) |
| 1998 | 94.5 mm (3.7 in) |
| 1999 | 106.5 mm (4.2 in) |
| 2000 | 148.8 mm (5.9 in) |
| 2001 | 155.4 mm (6.1 in) |
| 2002 | 88.5 mm (3.5 in) |
| 2003 | 126.5 mm (5.0 in) |
| 2004 | 163.3 mm (6.4 in) |
| 2005 | 46.6 mm (1.8 in) |
| 2006 | 113.0 mm (4.4 in) |
| 2007 | 118.9 mm (4.7 in) |
| 2008 | 180.1 mm (7.1 in) |
| 2009 | 70.2 mm (2.8 in) |
| 2010 | 120.1 mm (4.7 in) |
| 2011 | 62.0 mm (2.4 in) |
| 2012 | 73.1 mm (2.9 in) |
| 2013 | 200.1 mm (7.9 in) |
| 2014 | 111.6 mm (4.4 in) |
| 2015 | 76.2 mm (3.0 in) |
| 2016 | 147.6 mm (5.8 in) |
| 2017 | 125.0 mm (4.9 in) |
| 2018 | 189.3 mm (7.5 in) |
| 2019 | 121.6 mm (4.8 in) |
| 2020 | 84.8 mm (3.3 in) |
| 2021 | 78.5 mm (3.1 in) |
| 2022 | 97.5 mm (3.8 in) |
| 2023 | 89.9 mm (3.5 in) |
| 2024 | 161.3 mm (6.4 in) |
| 2025 | 117.7 mm (4.6 in) |
| 2026 | 101.9 mm (4.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1971 | 14 days |
| 1972 | 19 days |
| 1973 | 15 days |
| 1974 | 15 days |
| 1975 | 17 days |
| 1976 | 26 days |
| 1977 | 18 days |
| 1978 | 28 days |
| 1979 | 23 days |
| 1980 | 17 days |
| 1981 | 25 days |
| 1982 | 15 days |
| 1983 | 18 days |
| 1984 | 20 days |
| 1985 | 18 days |
| 1986 | 20 days |
| 1987 | 22 days |
| 1988 | 40 days |
| 1989 | 25 days |
| 1990 | 13 days |
| 1991 | 28 days |
| 1992 | 15 days |
| 1993 | 14 days |
| 1994 | 22 days |
| 1995 | 41 days |
| 1996 | 19 days |
| 1997 | 12 days |
| 1998 | 24 days |
| 1999 | 25 days |
| 2000 | 17 days |
| 2001 | 17 days |
| 2002 | 23 days |
| 2003 | 28 days |
| 2004 | 15 days |
| 2005 | 17 days |
| 2006 | 17 days |
| 2007 | 26 days |
| 2008 | 14 days |
| 2009 | 22 days |
| 2010 | 28 days |
| 2011 | 15 days |
| 2012 | 26 days |
| 2013 | 18 days |
| 2014 | 12 days |
| 2015 | 21 days |
| 2016 | 20 days |
| 2017 | 18 days |
| 2018 | 19 days |
| 2019 | 19 days |
| 2020 | 17 days |
| 2021 | 21 days |
| 2022 | 23 days |
| 2023 | 20 days |
| 2024 | 22 days |
| 2025 | 33 days |
| 2026 | 27 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
49 years with a frostAcross 49 years with a frost, the median last spring frost at Uw Arboretum - Madison falls on 6 May and the median first autumn frost on 3 October, which leaves a median of 150 days between them.
Fitted over all years, the growing season changes by +8.5 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1994 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 6 May | n/a | 4 May | n/a | -4.0 days per decade |
| First autumn frost | 3 October | n/a | 8 October | n/a | +4.5 days per decade |
| Growing days | 150 days | n/a | 154 days | n/a | +8.5 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
53 years, 1972 to 2025A day with at least 63.9 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 163.4 mm (6.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 63.9 mm (2.5 in) | |
| 5 years | 87.1 mm (3.4 in) | |
| 10 years | 103.8 mm (4.1 in) | |
| 25 years | 126.4 mm (5.0 in) | |
| 50 years | 144.4 mm (5.7 in) | |
| 100 years | 163.4 mm (6.4 in) | Longer than the 53 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, 53 years of values from 1972 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: 152.7 mm (6.0 in) in 2018; 152.4 mm (6.0 in) in 2001; 122.2 mm (4.8 in) in 2024.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Uw Arboretum - Madison, at 1994 and 1999. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1994 ran 0.3 C (0.5 F) lower than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1999 ran 0.4 C (0.8 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1994 | -0.3 | -0.5 | possible | 5 |
| 1999 | +0.4 | +0.8 | 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
2010 to 2025 against 1961 to 1990Over 2010 to 2025, Uw Arboretum - Madison had a mean temperature of 8.8 C (47.8 F) and 1,046.9 mm (41.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Whitehall (United States, 1,296 km away), Lagrange (United States, 365 km away) and Lowell Wwtp (United States, 258 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Whitehall | United States | 1,296 km (805 mi) | 8.4 C (47.1 F) | 959.5 mm (37.8 in) | 0.73 |
| Lagrange | United States | 365 km (227 mi) | 8.8 C (47.8 F) | 927.0 mm (36.5 in) | 0.77 |
| Lowell Wwtp | United States | 258 km (160 mi) | 9.4 C (48.9 F) | 1,043.6 mm (41.1 in) | 0.79 |
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).