Horicon Wwtp Weather Records (USC00473756)
Record envelope, standing records and threshold days for Horicon Wwtp (USC00473756), Wisconsin, United States, with 57 years of record.
Key Facts for Horicon Wwtp
- Horicon Wwtp (USC00473756) is a weather station in Wisconsin, United States at 43.44 latitude and -88.63 longitude, 269 m (881 ft) above sea level.
- The station reports from 1970 to 2026, 57 years of record.
- 1,464 records set at Horicon Wwtp still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Horicon Wwtp tied a daily record high maximum temperature of 28.3 C (82.9 F) on 11 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, 43.44 latitude, -88.63 longitude.
- Elevation: 269 m (881 ft).
- Period of record: 1970 to 2026, 57 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
15 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 12.8 C (55.0 F) | -37.8 C (-36.0 F) | 12.2 C (54.0 F) | -28.3 C (-18.9 F) |
| Feb | 21.1 C (70.0 F) | -35.0 C (-31.0 F) | 15.0 C (59.0 F) | -19.4 C (-2.9 F) |
| Mar | 28.3 C (82.9 F) | -26.1 C (-15.0 F) | 23.9 C (75.0 F) | -14.4 C (6.1 F) |
| Apr | 31.7 C (89.1 F) | -12.8 C (9.0 F) | 26.1 C (79.0 F) | -6.7 C (19.9 F) |
| May | 33.9 C (93.0 F) | -5.6 C (21.9 F) | 30.6 C (87.1 F) | -1.7 C (28.9 F) |
| Jun | 37.2 C (99.0 F) | -1.1 C (30.0 F) | 32.2 C (90.0 F) | 7.8 C (46.0 F) |
| Jul | 38.9 C (102.0 F) | 5.6 C (42.1 F) | 34.4 C (93.9 F) | 10.0 C (50.0 F) |
| Aug | 37.8 C (100.0 F) | 3.3 C (37.9 F) | 28.3 C (82.9 F) | 10.0 C (50.0 F) |
| Sep | 35.0 C (95.0 F) | -4.4 C (24.1 F) | 31.1 C (88.0 F) | 6.7 C (44.1 F) |
| Oct | 30.6 C (87.1 F) | -10.0 C (14.0 F) | 28.3 C (82.9 F) | 5.0 C (41.0 F) |
| Nov | 23.3 C (73.9 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Dec | 18.9 C (66.0 F) | -31.7 C (-25.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1970 | 1 |
| 1971 | 27 |
| 1972 | 36 |
| 1973 | 32 |
| 1974 | 19 |
| 1975 | 28 |
| 1976 | 43 |
| 1977 | 40 |
| 1978 | 25 |
| 1979 | 33 |
| 1980 | 15 |
| 1981 | 16 |
| 1982 | 31 |
| 1983 | 29 |
| 1984 | 19 |
| 1985 | 27 |
| 1986 | 31 |
| 1987 | 30 |
| 1988 | 40 |
| 1989 | 37 |
| 1990 | 41 |
| 1991 | 33 |
| 1992 | 30 |
| 1993 | 29 |
| 1994 | 35 |
| 1995 | 25 |
| 1996 | 33 |
| 1997 | 23 |
| 1998 | 28 |
| 1999 | 19 |
| 2000 | 30 |
| 2001 | 31 |
| 2002 | 23 |
| 2003 | 10 |
| 2004 | 16 |
| 2005 | 20 |
| 2006 | 24 |
| 2007 | 25 |
| 2008 | 21 |
| 2009 | 16 |
| 2010 | 15 |
| 2011 | 17 |
| 2012 | 43 |
| 2013 | 17 |
| 2014 | 36 |
| 2015 | 20 |
| 2016 | 17 |
| 2017 | 43 |
| 2018 | 18 |
| 2019 | 29 |
| 2020 | 21 |
| 2021 | 21 |
| 2022 | 19 |
| 2023 | 24 |
| 2024 | 20 |
| 2025 | 16 |
| 2026 | 17 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 2012-07-06 | Record high maximum temperature | Record high maximum temperature 38.9 C (102.0 F) |
| 2019-07-20 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
Wettest Day of Each Month
Jul: 150.9 mm (5.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 30.7 mm (1.2 in) | 29 January 2006 |
| Feb | 30.2 mm (1.2 in) | 27 February 2009 |
| Mar | 77.5 mm (3.1 in) | 31 March 1998 |
| Apr | 73.2 mm (2.9 in) | 4 April 2011 |
| May | 88.9 mm (3.5 in) | 13 May 1978 |
| Jun | 102.4 mm (4.0 in) | 9 June 2008 |
| Jul | 150.9 mm (5.9 in) | 21 July 1999 |
| Aug | 83.1 mm (3.3 in) | 9 August 1995 |
| Sep | 147.1 mm (5.8 in) | 10 September 1986 |
| Oct | 142.2 mm (5.6 in) | 2 October 2019 |
| Nov | 70.6 mm (2.8 in) | 4 November 2003 |
| Dec | 42.2 mm (1.7 in) | 20 December 1991 |
Period of Record Coverage
1970 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1970 | 60 | 16% | No |
| 1971 | 365 | 100% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 363 | 99% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 363 | 99% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 352 | 96% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 359 | 98% | Yes |
| 1983 | 353 | 97% | Yes |
| 1984 | 298 | 81% | No |
| 1985 | 360 | 99% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 363 | 99% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 361 | 99% | Yes |
| 2000 | 364 | 99% | Yes |
| 2001 | 361 | 99% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 364 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 364 | 100% | Yes |
| 2018 | 357 | 98% | Yes |
| 2019 | 341 | 93% | Yes |
| 2020 | 365 | 100% | Yes |
| 2021 | 362 | 99% | Yes |
| 2022 | 360 | 99% | Yes |
| 2023 | 359 | 98% | Yes |
| 2024 | 363 | 99% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 285 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 11 October 2026 | Horicon Wwtp, US | daily high max (Tie, Provisional) | 28.3 C (82.9 F) | tie | 16 years | 2 of 100 (Routine) |
| 1 October 2026 | Horicon Wwtp, US | daily rain (Provisional) | 17.5 mm (0.7 in) | 1.8 mm (0.07 in) | 28 years | 14 of 100 (Routine) |
| 19 September 2026 | Horicon Wwtp, US | daily rain (Provisional) | 43.4 mm (1.7 in) | 24.6 mm (1.0 in) | 11 years | 24 of 100 (Routine) |
| 9 September 2026 | Horicon Wwtp, US | daily high min (Tie, Provisional) | 17.8 C (64.0 F) | tie | 35 years | 3 of 100 (Routine) |
| 3 September 2026 | Horicon Wwtp, US | daily high min (Tie, Provisional) | 20.6 C (69.1 F) | tie | 15 years | 2 of 100 (Routine) |
| 1 September 2026 | Horicon Wwtp, US | daily high min (Tie, Provisional) | 20.6 C (69.1 F) | tie | 25 years | 3 of 100 (Routine) |
| 2 August 2026 | Horicon Wwtp, US | daily low max (Tie) | 23.3 C (73.9 F) | tie | 40 years | 4 of 100 (Routine) |
| 1 August 2026 | Horicon Wwtp, US | daily rain | 56.4 mm (2.2 in) | 40.4 mm (1.6 in) | 40 years | 46 of 100 (Notable) |
| 23 July 2026 | Horicon Wwtp, US | daily low min (Tie) | 10.0 C (50.0 F) | tie | 40 years | 4 of 100 (Routine) |
| 18 July 2026 | Horicon Wwtp, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 12 years | 2 of 100 (Routine) |
| 16 July 2026 | Horicon Wwtp, US | daily high max (Tie) | 34.4 C (93.9 F) | tie | 13 years | 2 of 100 (Routine) |
| 1 July 2026 | Horicon Wwtp, US | daily high min | 25.0 C (77.0 F) | 3.9 C (7.0 F) | 24 years | 23 of 100 (Routine) |
| 30 June 2026 | Horicon Wwtp, US | monthly high min (Tie) | 24.4 C (75.9 F) | tie | 55 years | 7 of 100 (Routine) |
| 18 June 2026 | Horicon Wwtp, US | daily low max | 16.1 C (61.0 F) | 2.2 C (4.0 F) | 32 years | 19 of 100 (Routine) |
| 27 May 2026 | Horicon Wwtp, US | daily high max (Tie) | 30.6 C (87.1 F) | tie | 40 years | 4 of 100 (Routine) |
| 7 May 2026 | Horicon Wwtp, US | daily low min | -0.6 C (30.9 F) | 0.6 C (1.1 F) | 45 years | 19 of 100 (Routine) |
| 2 May 2026 | Horicon Wwtp, US | daily low min (Tie) | -1.7 C (28.9 F) | tie | 48 years | 4 of 100 (Routine) |
| 14 April 2026 | Horicon Wwtp, US | daily high min | 12.8 C (55.0 F) | 0.6 C (1.1 F) | 48 years | 20 of 100 (Routine) |
| 13 April 2026 | Horicon Wwtp, US | daily high min (Tie) | 12.8 C (55.0 F) | tie | 48 years | 4 of 100 (Routine) |
| 31 March 2026 | Horicon Wwtp, US | daily high max (Tie) | 23.9 C (75.0 F) | tie | 48 years | 4 of 100 (Routine) |
Climate Trend
53 complete years, 1971 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1971 | 8.2 C | +0.48 C |
| 1972 | 6.9 C | -0.86 C |
| 1973 | 9.2 C | +1.46 C |
| 1974 | 8.0 C | +0.27 C |
| 1975 | 8.6 C | +0.83 C |
| 1976 | 7.5 C | -0.23 C |
| 1977 | 8.3 C | +0.54 C |
| 1978 | 7.0 C | -0.74 C |
| 1979 | 6.6 C | -1.10 C |
| 1980 | 7.4 C | -0.37 C |
| 1981 | 7.5 C | -0.22 C |
| 1982 | 6.7 C | -1.01 C |
| 1983 | 7.7 C | -0.06 C |
| 1985 | 6.6 C | -1.09 C |
| 1986 | 7.1 C | -0.67 C |
| 1987 | 8.6 C | +0.91 C |
| 1988 | 7.5 C | -0.27 C |
| 1989 | 5.9 C | -1.88 C |
| 1990 | 7.3 C | -0.44 C |
| 1991 | 8.1 C | +0.33 C |
| 1992 | 7.0 C | -0.70 C |
| 1993 | 6.3 C | -1.39 C |
| 1994 | 7.1 C | -0.63 C |
| 1995 | 7.0 C | -0.78 C |
| 1996 | 5.6 C | -2.18 C |
| 1997 | 7.0 C | -0.72 C |
| 1998 | 10.0 C | +2.28 C |
| 1999 | 8.7 C | +0.95 C |
| 2000 | 7.9 C | +0.20 C |
| 2001 | 8.5 C | +0.72 C |
| 2002 | 8.4 C | +0.65 C |
| 2003 | 7.4 C | -0.30 C |
| 2004 | 7.7 C | -0.07 C |
| 2005 | 8.2 C | +0.45 C |
| 2006 | 8.6 C | +0.89 C |
| 2007 | 8.1 C | +0.35 C |
| 2008 | 6.6 C | -1.12 C |
| 2009 | 6.9 C | -0.84 C |
| 2010 | 8.6 C | +0.82 C |
| 2011 | 7.8 C | +0.04 C |
| 2012 | 9.9 C | +2.19 C |
| 2013 | 6.8 C | -0.98 C |
| 2014 | 5.9 C | -1.82 C |
| 2015 | 8.3 C | +0.52 C |
| 2016 | 9.1 C | +1.36 C |
| 2017 | 8.2 C | +0.42 C |
| 2018 | 6.7 C | -1.06 C |
| 2020 | 8.1 C | +0.41 C |
| 2021 | 8.7 C | +0.94 C |
| 2022 | 7.4 C | -0.35 C |
| 2023 | 9.2 C | +1.42 C |
| 2024 | 9.6 C | +1.85 C |
| 2025 | 8.1 C | +0.34 C |
The fitted trend in annual mean temperature here over 1971 to 2025 is 0.14 C (-0.03 to 0.31) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.1 to 0.6) per decade. The slope is a straight line fitted to 53 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.14 C (-0.03 to 0.31) per decade | 0.3 F (-0.1 to 0.6) per decade | 1971 to 2025 | 53 | Not clearly different from zero |
| Mean daily maximum | 0.01 C (-0.16 to 0.18) per decade | 0.02 F (-0.29 to 0.33) per decade | 1971 to 2025 | 53 | Not clearly different from zero |
| Mean daily minimum | 0.3 C (0.1 to 0.5) per decade | 0.5 F (0.2 to 0.8) per decade | 1971 to 2025 | 53 | 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
1970 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.9 C (102.0 F) | 2012 | 33.9 C (93.0 F) | 57 |
| Coldest night (TNn) | -37.8 C (-36.0 F) | 1994 | -26.7 C (-16.1 F) | 57 |
| Wettest day (Rx1day) | 150.9 mm (5.9 in) | 1999 | 63.5 mm (2.5 in) | 57 |
| Wettest five days (Rx5day) | 239.8 mm (9.4 in) | 2008 | 93.2 mm (3.7 in) | 57 |
| Longest dry spell (CDD) | 43 days | 2025 | 19 days | 57 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1970 | 15.6 C (60.1 F) |
| 1971 | 35.6 C (96.1 F) |
| 1972 | 34.4 C (93.9 F) |
| 1973 | 36.7 C (98.1 F) |
| 1974 | 35.0 C (95.0 F) |
| 1975 | 33.9 C (93.0 F) |
| 1976 | 37.2 C (99.0 F) |
| 1977 | 36.7 C (98.1 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 31.7 C (89.1 F) |
| 1980 | 35.0 C (95.0 F) |
| 1981 | 32.2 C (90.0 F) |
| 1982 | 32.8 C (91.0 F) |
| 1983 | 35.6 C (96.1 F) |
| 1984 | 31.1 C (88.0 F) |
| 1985 | 33.9 C (93.0 F) |
| 1986 | 33.9 C (93.0 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 37.8 C (100.0 F) |
| 1989 | 34.4 C (93.9 F) |
| 1990 | 33.3 C (91.9 F) |
| 1991 | 33.9 C (93.0 F) |
| 1992 | 33.9 C (93.0 F) |
| 1993 | 31.7 C (89.1 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 38.3 C (100.9 F) |
| 1996 | 33.3 C (91.9 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 33.3 C (91.9 F) |
| 1999 | 35.6 C (96.1 F) |
| 2000 | 32.8 C (91.0 F) |
| 2001 | 34.4 C (93.9 F) |
| 2002 | 35.6 C (96.1 F) |
| 2003 | 33.9 C (93.0 F) |
| 2004 | 31.1 C (88.0 F) |
| 2005 | 34.4 C (93.9 F) |
| 2006 | 34.4 C (93.9 F) |
| 2007 | 34.4 C (93.9 F) |
| 2008 | 32.8 C (91.0 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 32.8 C (91.0 F) |
| 2011 | 35.0 C (95.0 F) |
| 2012 | 38.9 C (102.0 F) |
| 2013 | 34.4 C (93.9 F) |
| 2014 | 32.2 C (90.0 F) |
| 2015 | 32.8 C (91.0 F) |
| 2016 | 32.2 C (90.0 F) |
| 2017 | 32.8 C (91.0 F) |
| 2018 | 32.2 C (90.0 F) |
| 2019 | 32.8 C (91.0 F) |
| 2020 | 32.8 C (91.0 F) |
| 2021 | 32.8 C (91.0 F) |
| 2022 | 34.4 C (93.9 F) |
| 2023 | 35.6 C (96.1 F) |
| 2024 | 32.8 C (91.0 F) |
| 2025 | 33.3 C (91.9 F) |
| 2026 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1970 | -23.3 C (-9.9 F) |
| 1971 | -29.4 C (-20.9 F) |
| 1972 | -32.2 C (-26.0 F) |
| 1973 | -24.4 C (-11.9 F) |
| 1974 | -30.0 C (-22.0 F) |
| 1975 | -26.7 C (-16.1 F) |
| 1976 | -28.9 C (-20.0 F) |
| 1977 | -30.6 C (-23.1 F) |
| 1978 | -25.6 C (-14.1 F) |
| 1979 | -33.3 C (-27.9 F) |
| 1980 | -25.0 C (-13.0 F) |
| 1981 | -25.6 C (-14.1 F) |
| 1982 | -33.3 C (-27.9 F) |
| 1983 | -31.7 C (-25.1 F) |
| 1984 | -29.4 C (-20.9 F) |
| 1985 | -32.8 C (-27.0 F) |
| 1986 | -29.4 C (-20.9 F) |
| 1987 | -26.7 C (-16.1 F) |
| 1988 | -27.8 C (-18.0 F) |
| 1989 | -31.1 C (-24.0 F) |
| 1990 | -26.1 C (-15.0 F) |
| 1991 | -27.2 C (-17.0 F) |
| 1992 | -22.2 C (-8.0 F) |
| 1993 | -26.7 C (-16.1 F) |
| 1994 | -37.8 C (-36.0 F) |
| 1995 | -26.1 C (-15.0 F) |
| 1996 | -34.4 C (-29.9 F) |
| 1997 | -26.7 C (-16.1 F) |
| 1998 | -22.8 C (-9.0 F) |
| 1999 | -30.6 C (-23.1 F) |
| 2000 | -30.0 C (-22.0 F) |
| 2001 | -23.9 C (-11.0 F) |
| 2002 | -23.9 C (-11.0 F) |
| 2003 | -22.8 C (-9.0 F) |
| 2004 | -26.1 C (-15.0 F) |
| 2005 | -25.6 C (-14.1 F) |
| 2006 | -28.3 C (-18.9 F) |
| 2007 | -27.2 C (-17.0 F) |
| 2008 | -26.7 C (-16.1 F) |
| 2009 | -31.7 C (-25.1 F) |
| 2010 | -23.9 C (-11.0 F) |
| 2011 | -30.6 C (-23.1 F) |
| 2012 | -23.9 C (-11.0 F) |
| 2013 | -25.6 C (-14.1 F) |
| 2014 | -28.9 C (-20.0 F) |
| 2015 | -25.6 C (-14.1 F) |
| 2016 | -26.1 C (-15.0 F) |
| 2017 | -26.1 C (-15.0 F) |
| 2018 | -26.7 C (-16.1 F) |
| 2019 | -37.2 C (-35.0 F) |
| 2020 | -27.2 C (-17.0 F) |
| 2021 | -26.7 C (-16.1 F) |
| 2022 | -29.4 C (-20.9 F) |
| 2023 | -26.1 C (-15.0 F) |
| 2024 | -24.4 C (-11.9 F) |
| 2025 | -28.3 C (-18.9 F) |
| 2026 | -28.3 C (-18.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1970 | 14.5 mm (0.6 in) |
| 1971 | 43.2 mm (1.7 in) |
| 1972 | 63.5 mm (2.5 in) |
| 1973 | 43.9 mm (1.7 in) |
| 1974 | 61.5 mm (2.4 in) |
| 1975 | 43.2 mm (1.7 in) |
| 1976 | 58.4 mm (2.3 in) |
| 1977 | 88.9 mm (3.5 in) |
| 1978 | 88.9 mm (3.5 in) |
| 1979 | 55.9 mm (2.2 in) |
| 1980 | 68.8 mm (2.7 in) |
| 1981 | 75.2 mm (3.0 in) |
| 1982 | 56.9 mm (2.2 in) |
| 1983 | 61.2 mm (2.4 in) |
| 1984 | 61.0 mm (2.4 in) |
| 1985 | 99.3 mm (3.9 in) |
| 1986 | 147.1 mm (5.8 in) |
| 1987 | 71.4 mm (2.8 in) |
| 1988 | 56.4 mm (2.2 in) |
| 1989 | 50.8 mm (2.0 in) |
| 1990 | 72.9 mm (2.9 in) |
| 1991 | 58.9 mm (2.3 in) |
| 1992 | 34.5 mm (1.4 in) |
| 1993 | 72.6 mm (2.9 in) |
| 1994 | 48.5 mm (1.9 in) |
| 1995 | 83.1 mm (3.3 in) |
| 1996 | 61.5 mm (2.4 in) |
| 1997 | 38.1 mm (1.5 in) |
| 1998 | 77.5 mm (3.1 in) |
| 1999 | 150.9 mm (5.9 in) |
| 2000 | 64.8 mm (2.6 in) |
| 2001 | 69.3 mm (2.7 in) |
| 2002 | 48.5 mm (1.9 in) |
| 2003 | 70.6 mm (2.8 in) |
| 2004 | 49.5 mm (1.9 in) |
| 2005 | 45.0 mm (1.8 in) |
| 2006 | 56.4 mm (2.2 in) |
| 2007 | 77.5 mm (3.1 in) |
| 2008 | 102.4 mm (4.0 in) |
| 2009 | 67.3 mm (2.6 in) |
| 2010 | 85.6 mm (3.4 in) |
| 2011 | 73.2 mm (2.9 in) |
| 2012 | 31.2 mm (1.2 in) |
| 2013 | 56.9 mm (2.2 in) |
| 2014 | 60.7 mm (2.4 in) |
| 2015 | 78.2 mm (3.1 in) |
| 2016 | 90.2 mm (3.6 in) |
| 2017 | 35.6 mm (1.4 in) |
| 2018 | 81.5 mm (3.2 in) |
| 2019 | 142.2 mm (5.6 in) |
| 2020 | 60.2 mm (2.4 in) |
| 2021 | 46.5 mm (1.8 in) |
| 2022 | 103.6 mm (4.1 in) |
| 2023 | 64.8 mm (2.6 in) |
| 2024 | 97.5 mm (3.8 in) |
| 2025 | 68.1 mm (2.7 in) |
| 2026 | 56.4 mm (2.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1970 | 24.2 mm (1.0 in) |
| 1971 | 83.8 mm (3.3 in) |
| 1972 | 109.2 mm (4.3 in) |
| 1973 | 76.7 mm (3.0 in) |
| 1974 | 76.0 mm (3.0 in) |
| 1975 | 83.8 mm (3.3 in) |
| 1976 | 101.6 mm (4.0 in) |
| 1977 | 93.2 mm (3.7 in) |
| 1978 | 129.5 mm (5.1 in) |
| 1979 | 75.6 mm (3.0 in) |
| 1980 | 111.7 mm (4.4 in) |
| 1981 | 79.7 mm (3.1 in) |
| 1982 | 72.9 mm (2.9 in) |
| 1983 | 63.7 mm (2.5 in) |
| 1984 | 91.0 mm (3.6 in) |
| 1985 | 105.1 mm (4.1 in) |
| 1986 | 175.3 mm (6.9 in) |
| 1987 | 83.1 mm (3.3 in) |
| 1988 | 102.3 mm (4.0 in) |
| 1989 | 72.6 mm (2.9 in) |
| 1990 | 105.5 mm (4.2 in) |
| 1991 | 123.9 mm (4.9 in) |
| 1992 | 67.2 mm (2.6 in) |
| 1993 | 112.2 mm (4.4 in) |
| 1994 | 103.4 mm (4.1 in) |
| 1995 | 121.0 mm (4.8 in) |
| 1996 | 108.5 mm (4.3 in) |
| 1997 | 80.3 mm (3.2 in) |
| 1998 | 92.4 mm (3.6 in) |
| 1999 | 190.8 mm (7.5 in) |
| 2000 | 99.6 mm (3.9 in) |
| 2001 | 83.3 mm (3.3 in) |
| 2002 | 74.9 mm (2.9 in) |
| 2003 | 102.6 mm (4.0 in) |
| 2004 | 129.3 mm (5.1 in) |
| 2005 | 71.9 mm (2.8 in) |
| 2006 | 81.1 mm (3.2 in) |
| 2007 | 172.1 mm (6.8 in) |
| 2008 | 239.8 mm (9.4 in) |
| 2009 | 76.4 mm (3.0 in) |
| 2010 | 91.0 mm (3.6 in) |
| 2011 | 82.3 mm (3.2 in) |
| 2012 | 69.4 mm (2.7 in) |
| 2013 | 85.6 mm (3.4 in) |
| 2014 | 125.7 mm (4.9 in) |
| 2015 | 96.5 mm (3.8 in) |
| 2016 | 138.9 mm (5.5 in) |
| 2017 | 60.2 mm (2.4 in) |
| 2018 | 169.9 mm (6.7 in) |
| 2019 | 172.1 mm (6.8 in) |
| 2020 | 81.1 mm (3.2 in) |
| 2021 | 113.1 mm (4.5 in) |
| 2022 | 104.1 mm (4.1 in) |
| 2023 | 92.2 mm (3.6 in) |
| 2024 | 124.2 mm (4.9 in) |
| 2025 | 121.9 mm (4.8 in) |
| 2026 | 86.9 mm (3.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1970 | 12 days |
| 1971 | 23 days |
| 1972 | 18 days |
| 1973 | 17 days |
| 1974 | 15 days |
| 1975 | 15 days |
| 1976 | 27 days |
| 1977 | 18 days |
| 1978 | 23 days |
| 1979 | 18 days |
| 1980 | 27 days |
| 1981 | 37 days |
| 1982 | 19 days |
| 1983 | 17 days |
| 1984 | 25 days |
| 1985 | 17 days |
| 1986 | 23 days |
| 1987 | 22 days |
| 1988 | 20 days |
| 1989 | 22 days |
| 1990 | 17 days |
| 1991 | 16 days |
| 1992 | 20 days |
| 1993 | 14 days |
| 1994 | 14 days |
| 1995 | 40 days |
| 1996 | 17 days |
| 1997 | 15 days |
| 1998 | 18 days |
| 1999 | 25 days |
| 2000 | 14 days |
| 2001 | 15 days |
| 2002 | 28 days |
| 2003 | 28 days |
| 2004 | 19 days |
| 2005 | 19 days |
| 2006 | 16 days |
| 2007 | 32 days |
| 2008 | 20 days |
| 2009 | 26 days |
| 2010 | 21 days |
| 2011 | 16 days |
| 2012 | 17 days |
| 2013 | 16 days |
| 2014 | 23 days |
| 2015 | 26 days |
| 2016 | 19 days |
| 2017 | 15 days |
| 2018 | 20 days |
| 2019 | 18 days |
| 2020 | 20 days |
| 2021 | 23 days |
| 2022 | 23 days |
| 2023 | 18 days |
| 2024 | 19 days |
| 2025 | 43 days |
| 2026 | 18 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
53 years with a frostAcross 53 years with a frost, the median last spring frost at Horicon Wwtp falls on 4 May and the median first autumn frost on 5 October, which leaves a median of 157 days between them.
Fitted over all years, the growing season changes by +3.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1995 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 4 May | n/a | 4 May | n/a | 0.0 days per decade |
| First autumn frost | 5 October | n/a | 8 October | n/a | +3.4 days per decade |
| Growing days | 157 days | n/a | 161 days | n/a | +3.4 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
55 years, 1971 to 2025A day with at least 64.3 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 156.9 mm (6.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 64.3 mm (2.5 in) | |
| 5 years | 86.1 mm (3.4 in) | |
| 10 years | 101.6 mm (4.0 in) | |
| 25 years | 122.7 mm (4.8 in) | |
| 50 years | 139.4 mm (5.5 in) | |
| 100 years | 156.9 mm (6.2 in) | Longer than the 55 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, 55 years of values from 1971 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: 150.9 mm (5.9 in) in 1999; 147.1 mm (5.8 in) in 1986; 142.2 mm (5.6 in) in 2019.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2010 to 2025 against 1961 to 1990Over 2010 to 2025, Horicon Wwtp had a mean temperature of 8.1 C (46.7 F) and 919.4 mm (36.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Whitehall (United States, 1,227 km away), Antioch (United States, 115 km away) and Paw Paw 2S (United States, 199 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Whitehall | United States | 1,227 km (762 mi) | 8.4 C (47.1 F) | 959.5 mm (37.8 in) | 0.57 |
| Antioch | United States | 115 km (71 mi) | 8.1 C (46.6 F) | 913.4 mm (36.0 in) | 0.59 |
| Paw Paw 2S | United States | 199 km (124 mi) | 8.4 C (47.1 F) | 907.5 mm (35.7 in) | 0.67 |
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).