Platteville Weather Records (USC00476646)
Record envelope, standing records and threshold days for Platteville (USC00476646), Wisconsin, United States, with 78 years of record.
Key Facts for Platteville
- Platteville (USC00476646) is a weather station in Wisconsin, United States at 42.75 latitude and -90.47 longitude, 302 m (990 ft) above sea level.
- The station reports from 1936 to 2013, 78 years of record.
- 1,464 records set at Platteville still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Platteville set a daily record precipitation of 61.0 mm (2.4 in) on 18 April 2013.
About the Station
- Location: Wisconsin, United States, 42.75 latitude, -90.47 longitude.
- Elevation: 302 m (990 ft).
- Period of record: 1936 to 2013, 78 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 14.4 C (57.9 F) | -34.4 C (-29.9 F) | n/a | n/a |
| Feb | 18.9 C (66.0 F) | -35.6 C (-32.1 F) | n/a | n/a |
| Mar | 29.4 C (84.9 F) | -32.8 C (-27.0 F) | n/a | n/a |
| Apr | 34.4 C (93.9 F) | -16.1 C (3.0 F) | n/a | n/a |
| May | 33.9 C (93.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Jun | 38.3 C (100.9 F) | 2.2 C (36.0 F) | n/a | n/a |
| Jul | 38.9 C (102.0 F) | 5.6 C (42.1 F) | n/a | n/a |
| Aug | 39.4 C (102.9 F) | 3.3 C (37.9 F) | n/a | n/a |
| Sep | 37.8 C (100.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Oct | 32.8 C (91.0 F) | -11.1 C (12.0 F) | n/a | n/a |
| Nov | 26.7 C (80.1 F) | -25.6 C (-14.1 F) | n/a | n/a |
| Dec | 17.8 C (64.0 F) | -32.2 C (-26.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1943 | 1 |
| 1944 | 15 |
| 1945 | 39 |
| 1946 | 34 |
| 1947 | 19 |
| 1948 | 12 |
| 1949 | 15 |
| 1950 | 36 |
| 1951 | 21 |
| 1952 | 39 |
| 1953 | 37 |
| 1954 | 22 |
| 1955 | 30 |
| 1956 | 22 |
| 1957 | 13 |
| 1958 | 16 |
| 1959 | 26 |
| 1960 | 15 |
| 1961 | 10 |
| 1962 | 27 |
| 1963 | 33 |
| 1964 | 25 |
| 1965 | 29 |
| 1966 | 21 |
| 1967 | 27 |
| 1968 | 20 |
| 1969 | 20 |
| 1970 | 15 |
| 1971 | 22 |
| 1972 | 20 |
| 1973 | 22 |
| 1974 | 21 |
| 1975 | 23 |
| 1976 | 26 |
| 1977 | 28 |
| 1978 | 10 |
| 1979 | 24 |
| 1980 | 15 |
| 1981 | 17 |
| 1982 | 24 |
| 1983 | 33 |
| 1984 | 24 |
| 1985 | 22 |
| 1986 | 22 |
| 1987 | 18 |
| 1988 | 51 |
| 1989 | 22 |
| 1990 | 26 |
| 1991 | 32 |
| 1992 | 20 |
| 1993 | 13 |
| 1994 | 22 |
| 1995 | 17 |
| 1996 | 25 |
| 1997 | 22 |
| 1998 | 19 |
| 1999 | 17 |
| 2000 | 27 |
| 2001 | 9 |
| 2002 | 20 |
| 2003 | 11 |
| 2004 | 9 |
| 2005 | 10 |
| 2006 | 24 |
| 2007 | 20 |
| 2008 | 15 |
| 2009 | 12 |
| 2010 | 8 |
| 2011 | 3 |
All-Time Record Progression
13 new records| Date | Kind | Detail |
|---|---|---|
| 1979-01-19 | Record snow depth | Record snow depth 66.0 cm (26.0 in) |
| 1979-01-23 | Record snow depth | Record snow depth 73.7 cm (29.0 in) |
| 1983-12-23 | Record low maximum temperature | Record low maximum temperature -24.4 C (-11.9 F) |
| 1988-08-16 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 1988-08-17 | Record high maximum temperature | Record high maximum temperature 39.4 C (102.9 F) |
| 1989-07-10 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 1990-12-03 | Record daily snowfall | Record daily snowfall 46.7 cm (18.4 in) |
| 1994-01-16 | Record low maximum temperature | Record low maximum temperature -25.0 C (-13.0 F) |
| 1994-01-19 | Record low maximum temperature | Record low maximum temperature -26.7 C (-16.1 F) |
| 1996-02-03 | Record low maximum temperature | Record low maximum temperature -27.8 C (-18.0 F) |
| 1996-02-03 | Record low minimum temperature | Record low minimum temperature -35.6 C (-32.1 F) |
| 2000-06-01 | Record daily precipitation | Record daily precipitation 151.9 mm (6.0 in) |
| 2000-12-29 | Record snow depth | Record snow depth 76.2 cm (30.0 in) |
Wettest Day of Each Month
Jun: 151.9 mm (6.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 42.7 mm (1.7 in) | 5 January 1946 |
| Feb | 43.4 mm (1.7 in) | 27 February 1998 |
| Mar | 64.8 mm (2.6 in) | 31 March 1998 |
| Apr | 61.5 mm (2.4 in) | 14 April 1974 |
| May | 81.5 mm (3.2 in) | 17 May 1999 |
| Jun | 151.9 mm (6.0 in) | 1 June 2000 |
| Jul | 125.0 mm (4.9 in) | 8 July 1951 |
| Aug | 130.6 mm (5.1 in) | 2 August 1942 |
| Sep | 135.9 mm (5.4 in) | 14 September 2003 |
| Oct | 71.1 mm (2.8 in) | 10 October 1954 |
| Nov | 98.6 mm (3.9 in) | 4 November 2003 |
| Dec | 63.8 mm (2.5 in) | 15 December 1971 |
Period of Record Coverage
1943 to 2011| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1943 | 29 | 8% | No |
| 1944 | 267 | 73% | No |
| 1945 | 351 | 96% | Yes |
| 1946 | 360 | 99% | Yes |
| 1947 | 200 | 55% | No |
| 1948 | 348 | 95% | Yes |
| 1949 | 310 | 85% | No |
| 1950 | 358 | 98% | Yes |
| 1951 | 336 | 92% | Yes |
| 1952 | 362 | 99% | Yes |
| 1953 | 363 | 99% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 363 | 99% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 363 | 99% | 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 | 360 | 99% | 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 | 364 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 330 | 90% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 362 | 99% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 361 | 99% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 362 | 99% | Yes |
| 1989 | 362 | 99% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 355 | 97% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 363 | 99% | Yes |
| 2008 | 364 | 99% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 351 | 96% | Yes |
| 2011 | 90 | 25% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 18 April 2013 | Platteville, US | daily rain | 61.0 mm (2.4 in) | 16.3 mm (0.6 in) | 72 years | 44 of 100 (Notable) |
| 5 September 2012 | Platteville, US | daily rain | 66.0 mm (2.6 in) | 28.9 mm (1.1 in) | 56 years | 44 of 100 (Notable) |
| 28 April 2011 | Platteville, US | daily low max (Tie) | 6.7 C (44.1 F) | tie | 40 years | 4 of 100 (Routine) |
| 21 April 2011 | Platteville, US | daily low max | 6.7 C (44.1 F) | 1.6 C (2.9 F) | 10 years | 11 of 100 (Routine) |
| 20 April 2011 | Platteville, US | daily low max | 1.7 C (35.1 F) | 4.4 C (7.9 F) | 32 years | 21 of 100 (Routine) |
| 21 March 2011 | Platteville, US | daily rain | 21.6 mm (0.9 in) | 11.2 mm (0.4 in) | 38 years | 20 of 100 (Routine) |
| 11 February 2011 | Platteville, US | daily low min | -26.7 C (-16.1 F) | 1.7 C (3.1 F) | 56 years | 24 of 100 (Routine) |
| 2 February 2011 | Platteville, US | monthly snowfall | 29.5 cm (11.6 in) | 7.7 cm (3.0 in) | 60 years | 53 of 100 (Notable) |
| 2 February 2011 | Platteville, US | daily rain | 20.1 mm (0.8 in) | 2.1 mm (0.08 in) | 28 years | 18 of 100 (Routine) |
| 1 February 2011 | Platteville, US | daily snowfall | 8.1 cm (3.2 in) | 0.2 cm (0.1 in) | 32 years | 16 of 100 (Routine) |
| 21 December 2010 | Platteville, US | daily snowfall | 13.2 cm (5.2 in) | 3.5 cm (1.4 in) | 9 years | 15 of 100 (Routine) |
| 12 December 2010 | Platteville, US | daily rain | 21.1 mm (0.8 in) | 7.4 mm (0.29 in) | 3 years | 17 of 100 (Routine) |
| 4 December 2010 | Platteville, US | daily snowfall | 17.8 cm (7.0 in) | 7.6 cm (3.0 in) | 4 years | 22 of 100 (Routine) |
| 11 October 2010 | Platteville, US | daily high max | 29.4 C (84.9 F) | 2.2 C (4.0 F) | 49 years | 23 of 100 (Routine) |
| 10 October 2010 | Platteville, US | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 48 years | 21 of 100 (Routine) |
| 22 September 2010 | Platteville, US | daily high min (Tie) | 16.7 C (62.1 F) | tie | 25 years | 3 of 100 (Routine) |
| 4 September 2010 | Platteville, US | daily low max | 16.1 C (61.0 F) | 2.8 C (5.0 F) | 64 years | 30 of 100 (Routine) |
| 9 August 2010 | Platteville, US | daily rain | 98.3 mm (3.9 in) | 56.9 mm (2.2 in) | 64 years | 62 of 100 (Major) |
| 23 July 2010 | Platteville, US | daily rain | 69.1 mm (2.7 in) | 25.7 mm (1.0 in) | 41 years | 34 of 100 (Routine) |
| 31 May 2010 | Platteville, US | daily high min (Tie) | 17.2 C (63.0 F) | tie | 11 years | 2 of 100 (Routine) |
Climate Trend
60 complete years, 1948 to 2010| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1948 | 9.3 C | +0.99 C |
| 1950 | 7.8 C | -0.47 C |
| 1951 | 7.8 C | -0.48 C |
| 1952 | 9.3 C | +1.01 C |
| 1953 | 9.8 C | +1.45 C |
| 1954 | 9.3 C | +0.99 C |
| 1955 | 8.9 C | +0.60 C |
| 1956 | 8.8 C | +0.45 C |
| 1957 | 8.5 C | +0.23 C |
| 1958 | 8.1 C | -0.22 C |
| 1959 | 8.0 C | -0.35 C |
| 1960 | 8.3 C | +0.03 C |
| 1961 | 8.6 C | +0.29 C |
| 1962 | 7.6 C | -0.70 C |
| 1963 | 8.0 C | -0.30 C |
| 1964 | 8.8 C | +0.53 C |
| 1965 | 8.1 C | -0.16 C |
| 1966 | 7.7 C | -0.63 C |
| 1967 | 7.8 C | -0.54 C |
| 1968 | 8.6 C | +0.33 C |
| 1969 | 7.9 C | -0.42 C |
| 1970 | 8.2 C | -0.12 C |
| 1971 | 8.4 C | +0.05 C |
| 1972 | 7.2 C | -1.09 C |
| 1973 | 9.4 C | +1.07 C |
| 1974 | 8.2 C | -0.06 C |
| 1975 | 8.4 C | +0.12 C |
| 1976 | 8.1 C | -0.25 C |
| 1977 | 8.5 C | +0.18 C |
| 1978 | 7.3 C | -1.00 C |
| 1979 | 7.2 C | -1.10 C |
| 1980 | 8.3 C | -0.01 C |
| 1981 | 9.0 C | +0.67 C |
| 1983 | 8.9 C | +0.58 C |
| 1984 | 8.8 C | +0.47 C |
| 1985 | 7.8 C | -0.47 C |
| 1986 | 8.9 C | +0.63 C |
| 1987 | 10.5 C | +2.16 C |
| 1988 | 9.0 C | +0.71 C |
| 1989 | 8.0 C | -0.33 C |
| 1990 | 9.6 C | +1.30 C |
| 1991 | 8.6 C | +0.33 C |
| 1992 | 7.6 C | -0.70 C |
| 1993 | 7.0 C | -1.32 C |
| 1994 | 7.5 C | -0.84 C |
| 1995 | 7.6 C | -0.72 C |
| 1996 | 6.2 C | -2.12 C |
| 1997 | 7.4 C | -0.90 C |
| 1998 | 9.9 C | +1.56 C |
| 2000 | 8.1 C | -0.24 C |
| 2001 | 8.6 C | +0.25 C |
| 2002 | 8.5 C | +0.16 C |
| 2003 | 7.7 C | -0.61 C |
| 2004 | 8.1 C | -0.24 C |
| 2005 | 8.6 C | +0.28 C |
| 2006 | 9.0 C | +0.67 C |
| 2007 | 8.3 C | +0.02 C |
| 2008 | 7.0 C | -1.34 C |
| 2009 | 7.4 C | -0.86 C |
| 2010 | 8.8 C | +0.52 C |
The fitted trend in annual mean temperature here over 1948 to 2010 is -0.08 C (-0.19 to 0.03) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.1) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.08 C (-0.19 to 0.03) per decade | -0.1 F (-0.3 to 0.1) per decade | 1948 to 2010 | 60 | Not clearly different from zero |
| Mean daily maximum | -0.2 C (-0.3 to -0.1) per decade | -0.4 F (-0.6 to -0.2) per decade | 1948 to 2010 | 60 | Fall |
| Mean daily minimum | 0.1 C (-0.1 to 0.2) per decade | 0.1 F (-0.1 to 0.3) per decade | 1948 to 2010 | 60 | 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
1936 to 2013| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 39.4 C (102.9 F) | 1988 | 34.4 C (93.9 F) | 69 |
| Coldest night (TNn) | -35.6 C (-32.1 F) | 1996 | -27.2 C (-17.0 F) | 65 |
| Wettest day (Rx1day) | 151.9 mm (6.0 in) | 2000 | 65.4 mm (2.6 in) | 78 |
| Wettest five days (Rx5day) | 201.2 mm (7.9 in) | 2007 | 95.2 mm (3.7 in) | 76 |
| Longest dry spell (CDD) | 55 days | 1952 | 22 days | 77 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | 10.0 C (50.0 F) |
| 1944 | 33.9 C (93.0 F) |
| 1945 | 33.9 C (93.0 F) |
| 1946 | 35.6 C (96.1 F) |
| 1947 | 33.3 C (91.9 F) |
| 1948 | 35.6 C (96.1 F) |
| 1949 | 33.3 C (91.9 F) |
| 1950 | 34.4 C (93.9 F) |
| 1951 | 34.4 C (93.9 F) |
| 1952 | 35.0 C (95.0 F) |
| 1953 | 37.8 C (100.0 F) |
| 1954 | 36.7 C (98.1 F) |
| 1955 | 38.9 C (102.0 F) |
| 1956 | 35.6 C (96.1 F) |
| 1957 | 34.4 C (93.9 F) |
| 1958 | 34.4 C (93.9 F) |
| 1959 | 35.0 C (95.0 F) |
| 1960 | 35.0 C (95.0 F) |
| 1961 | 34.4 C (93.9 F) |
| 1962 | 33.3 C (91.9 F) |
| 1963 | 37.2 C (99.0 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 37.2 C (99.0 F) |
| 1966 | 35.0 C (95.0 F) |
| 1967 | 33.3 C (91.9 F) |
| 1968 | 33.3 C (91.9 F) |
| 1969 | 32.8 C (91.0 F) |
| 1970 | 34.4 C (93.9 F) |
| 1971 | 33.9 C (93.0 F) |
| 1972 | 33.3 C (91.9 F) |
| 1973 | 33.9 C (93.0 F) |
| 1974 | 34.4 C (93.9 F) |
| 1975 | 33.9 C (93.0 F) |
| 1976 | 36.1 C (97.0 F) |
| 1977 | 37.2 C (99.0 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 32.2 C (90.0 F) |
| 1980 | 36.1 C (97.0 F) |
| 1981 | 35.0 C (95.0 F) |
| 1982 | 33.3 C (91.9 F) |
| 1983 | 37.8 C (100.0 F) |
| 1984 | 35.6 C (96.1 F) |
| 1985 | 34.4 C (93.9 F) |
| 1986 | 33.9 C (93.0 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 39.4 C (102.9 F) |
| 1989 | 37.2 C (99.0 F) |
| 1990 | 33.9 C (93.0 F) |
| 1991 | 33.3 C (91.9 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 32.2 C (90.0 F) |
| 1994 | 33.9 C (93.0 F) |
| 1995 | 37.2 C (99.0 F) |
| 1996 | 33.9 C (93.0 F) |
| 1997 | 33.3 C (91.9 F) |
| 1998 | 33.9 C (93.0 F) |
| 1999 | 36.1 C (97.0 F) |
| 2000 | 33.9 C (93.0 F) |
| 2001 | 34.4 C (93.9 F) |
| 2002 | 35.6 C (96.1 F) |
| 2003 | 35.0 C (95.0 F) |
| 2004 | 31.7 C (89.1 F) |
| 2005 | 34.4 C (93.9 F) |
| 2006 | 35.6 C (96.1 F) |
| 2007 | 32.2 C (90.0 F) |
| 2008 | 31.7 C (89.1 F) |
| 2009 | 34.4 C (93.9 F) |
| 2010 | 33.3 C (91.9 F) |
| 2011 | 26.7 C (80.1 F) |
| 2012 | n/a |
| 2013 | n/a |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | -14.4 C (6.1 F) |
| 1948 | -23.9 C (-11.0 F) |
| 1949 | -27.2 C (-17.0 F) |
| 1950 | -31.1 C (-24.0 F) |
| 1951 | -34.4 C (-29.9 F) |
| 1952 | -27.2 C (-17.0 F) |
| 1953 | -21.7 C (-7.1 F) |
| 1954 | -25.6 C (-14.1 F) |
| 1955 | -27.2 C (-17.0 F) |
| 1956 | -26.7 C (-16.1 F) |
| 1957 | -27.2 C (-17.0 F) |
| 1958 | -27.2 C (-17.0 F) |
| 1959 | -30.0 C (-22.0 F) |
| 1960 | -28.3 C (-18.9 F) |
| 1961 | -26.1 C (-15.0 F) |
| 1962 | -32.8 C (-27.0 F) |
| 1963 | -33.3 C (-27.9 F) |
| 1964 | -23.3 C (-9.9 F) |
| 1965 | -30.0 C (-22.0 F) |
| 1966 | -31.7 C (-25.1 F) |
| 1967 | -31.7 C (-25.1 F) |
| 1968 | -28.3 C (-18.9 F) |
| 1969 | -27.2 C (-17.0 F) |
| 1970 | -32.2 C (-26.0 F) |
| 1971 | -29.4 C (-20.9 F) |
| 1972 | -30.6 C (-23.1 F) |
| 1973 | -26.7 C (-16.1 F) |
| 1974 | -30.6 C (-23.1 F) |
| 1975 | -26.7 C (-16.1 F) |
| 1976 | -28.3 C (-18.9 F) |
| 1977 | -31.7 C (-25.1 F) |
| 1978 | -26.1 C (-15.0 F) |
| 1979 | -31.7 C (-25.1 F) |
| 1980 | -22.8 C (-9.0 F) |
| 1981 | -25.0 C (-13.0 F) |
| 1982 | -32.8 C (-27.0 F) |
| 1983 | -32.2 C (-26.0 F) |
| 1984 | -29.4 C (-20.9 F) |
| 1985 | -33.3 C (-27.9 F) |
| 1986 | -29.4 C (-20.9 F) |
| 1987 | -22.8 C (-9.0 F) |
| 1988 | -31.7 C (-25.1 F) |
| 1989 | -30.0 C (-22.0 F) |
| 1990 | -27.2 C (-17.0 F) |
| 1991 | -26.1 C (-15.0 F) |
| 1992 | -23.3 C (-9.9 F) |
| 1993 | -26.7 C (-16.1 F) |
| 1994 | -32.8 C (-27.0 F) |
| 1995 | -22.2 C (-8.0 F) |
| 1996 | -35.6 C (-32.1 F) |
| 1997 | -26.7 C (-16.1 F) |
| 1998 | -22.8 C (-9.0 F) |
| 1999 | -31.1 C (-24.0 F) |
| 2000 | -29.4 C (-20.9 F) |
| 2001 | -23.3 C (-9.9 F) |
| 2002 | -24.4 C (-11.9 F) |
| 2003 | -23.3 C (-9.9 F) |
| 2004 | -26.1 C (-15.0 F) |
| 2005 | -24.4 C (-11.9 F) |
| 2006 | -28.9 C (-20.0 F) |
| 2007 | -28.9 C (-20.0 F) |
| 2008 | -27.8 C (-18.0 F) |
| 2009 | -31.1 C (-24.0 F) |
| 2010 | -24.4 C (-11.9 F) |
| 2011 | -27.2 C (-17.0 F) |
| 2012 | n/a |
| 2013 | n/a |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1936 | 47.0 mm (1.9 in) |
| 1937 | 66.0 mm (2.6 in) |
| 1938 | 50.8 mm (2.0 in) |
| 1939 | 69.1 mm (2.7 in) |
| 1940 | 86.9 mm (3.4 in) |
| 1941 | 83.3 mm (3.3 in) |
| 1942 | 130.6 mm (5.1 in) |
| 1943 | 78.2 mm (3.1 in) |
| 1944 | 46.0 mm (1.8 in) |
| 1945 | 54.9 mm (2.2 in) |
| 1946 | 53.6 mm (2.1 in) |
| 1947 | 56.6 mm (2.2 in) |
| 1948 | 56.1 mm (2.2 in) |
| 1949 | 39.1 mm (1.5 in) |
| 1950 | 75.7 mm (3.0 in) |
| 1951 | 125.0 mm (4.9 in) |
| 1952 | 51.6 mm (2.0 in) |
| 1953 | 57.2 mm (2.3 in) |
| 1954 | 71.1 mm (2.8 in) |
| 1955 | 54.4 mm (2.1 in) |
| 1956 | 66.3 mm (2.6 in) |
| 1957 | 62.2 mm (2.4 in) |
| 1958 | 38.6 mm (1.5 in) |
| 1959 | 69.9 mm (2.8 in) |
| 1960 | 76.2 mm (3.0 in) |
| 1961 | 81.3 mm (3.2 in) |
| 1962 | 118.6 mm (4.7 in) |
| 1963 | 57.9 mm (2.3 in) |
| 1964 | 44.5 mm (1.8 in) |
| 1965 | 57.4 mm (2.3 in) |
| 1966 | 76.5 mm (3.0 in) |
| 1967 | 68.3 mm (2.7 in) |
| 1968 | 43.4 mm (1.7 in) |
| 1969 | 76.2 mm (3.0 in) |
| 1970 | 73.4 mm (2.9 in) |
| 1971 | 63.8 mm (2.5 in) |
| 1972 | 50.3 mm (2.0 in) |
| 1973 | 42.9 mm (1.7 in) |
| 1974 | 63.2 mm (2.5 in) |
| 1975 | 86.9 mm (3.4 in) |
| 1976 | 43.4 mm (1.7 in) |
| 1977 | 105.4 mm (4.1 in) |
| 1978 | 77.0 mm (3.0 in) |
| 1979 | 31.5 mm (1.2 in) |
| 1980 | 35.6 mm (1.4 in) |
| 1981 | 94.2 mm (3.7 in) |
| 1982 | 72.6 mm (2.9 in) |
| 1983 | 52.3 mm (2.1 in) |
| 1984 | 84.1 mm (3.3 in) |
| 1985 | 55.9 mm (2.2 in) |
| 1986 | 60.5 mm (2.4 in) |
| 1987 | 56.9 mm (2.2 in) |
| 1988 | 61.0 mm (2.4 in) |
| 1989 | 66.5 mm (2.6 in) |
| 1990 | 89.4 mm (3.5 in) |
| 1991 | 117.3 mm (4.6 in) |
| 1992 | 52.3 mm (2.1 in) |
| 1993 | 53.3 mm (2.1 in) |
| 1994 | 69.1 mm (2.7 in) |
| 1995 | 77.0 mm (3.0 in) |
| 1996 | 71.1 mm (2.8 in) |
| 1997 | 83.3 mm (3.3 in) |
| 1998 | 64.8 mm (2.6 in) |
| 1999 | 81.5 mm (3.2 in) |
| 2000 | 151.9 mm (6.0 in) |
| 2001 | 58.9 mm (2.3 in) |
| 2002 | 56.1 mm (2.2 in) |
| 2003 | 135.9 mm (5.4 in) |
| 2004 | 78.2 mm (3.1 in) |
| 2005 | 101.6 mm (4.0 in) |
| 2006 | 57.7 mm (2.3 in) |
| 2007 | 62.0 mm (2.4 in) |
| 2008 | 68.8 mm (2.7 in) |
| 2009 | 58.9 mm (2.3 in) |
| 2010 | 98.3 mm (3.9 in) |
| 2011 | 36.1 mm (1.4 in) |
| 2012 | 66.0 mm (2.6 in) |
| 2013 | 61.0 mm (2.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1936 | 75.5 mm (3.0 in) |
| 1937 | 68.5 mm (2.7 in) |
| 1938 | 106.1 mm (4.2 in) |
| 1939 | 71.9 mm (2.8 in) |
| 1940 | 97.5 mm (3.8 in) |
| 1941 | 145.8 mm (5.7 in) |
| 1942 | 184.7 mm (7.3 in) |
| 1943 | 103.9 mm (4.1 in) |
| 1944 | 101.4 mm (4.0 in) |
| 1945 | 52.1 mm (2.1 in) |
| 1946 | 88.7 mm (3.5 in) |
| 1947 | 84.6 mm (3.3 in) |
| 1948 | 89.2 mm (3.5 in) |
| 1949 | 40.2 mm (1.6 in) |
| 1950 | 85.9 mm (3.4 in) |
| 1951 | 128.0 mm (5.0 in) |
| 1952 | 55.2 mm (2.2 in) |
| 1953 | 75.3 mm (3.0 in) |
| 1954 | 95.1 mm (3.7 in) |
| 1955 | 76.2 mm (3.0 in) |
| 1956 | 95.2 mm (3.7 in) |
| 1957 | 91.0 mm (3.6 in) |
| 1958 | 60.7 mm (2.4 in) |
| 1959 | 107.5 mm (4.2 in) |
| 1960 | 115.8 mm (4.6 in) |
| 1961 | 151.9 mm (6.0 in) |
| 1962 | 118.6 mm (4.7 in) |
| 1963 | 71.9 mm (2.8 in) |
| 1964 | 90.7 mm (3.6 in) |
| 1965 | 109.0 mm (4.3 in) |
| 1966 | 166.9 mm (6.6 in) |
| 1967 | 130.7 mm (5.1 in) |
| 1968 | 97.1 mm (3.8 in) |
| 1969 | 177.4 mm (7.0 in) |
| 1970 | 94.5 mm (3.7 in) |
| 1971 | 79.8 mm (3.1 in) |
| 1972 | 87.4 mm (3.4 in) |
| 1973 | 82.3 mm (3.2 in) |
| 1974 | 125.4 mm (4.9 in) |
| 1975 | 104.9 mm (4.1 in) |
| 1976 | 58.0 mm (2.3 in) |
| 1977 | 191.5 mm (7.5 in) |
| 1978 | 130.6 mm (5.1 in) |
| 1979 | 78.0 mm (3.1 in) |
| 1980 | 88.4 mm (3.5 in) |
| 1981 | 104.1 mm (4.1 in) |
| 1982 | 76.5 mm (3.0 in) |
| 1983 | 97.0 mm (3.8 in) |
| 1984 | 104.0 mm (4.1 in) |
| 1985 | 69.9 mm (2.8 in) |
| 1986 | 82.6 mm (3.3 in) |
| 1987 | 68.0 mm (2.7 in) |
| 1988 | 102.4 mm (4.0 in) |
| 1989 | 86.3 mm (3.4 in) |
| 1990 | 117.8 mm (4.6 in) |
| 1991 | 122.2 mm (4.8 in) |
| 1992 | 80.8 mm (3.2 in) |
| 1993 | 126.3 mm (5.0 in) |
| 1994 | 94.0 mm (3.7 in) |
| 1995 | 84.4 mm (3.3 in) |
| 1996 | 170.1 mm (6.7 in) |
| 1997 | 84.6 mm (3.3 in) |
| 1998 | 88.2 mm (3.5 in) |
| 1999 | 118.4 mm (4.7 in) |
| 2000 | 185.4 mm (7.3 in) |
| 2001 | 82.9 mm (3.3 in) |
| 2002 | 83.0 mm (3.3 in) |
| 2003 | 150.6 mm (5.9 in) |
| 2004 | 110.2 mm (4.3 in) |
| 2005 | 135.6 mm (5.3 in) |
| 2006 | 89.4 mm (3.5 in) |
| 2007 | 201.2 mm (7.9 in) |
| 2008 | 139.7 mm (5.5 in) |
| 2009 | 113.8 mm (4.5 in) |
| 2010 | 158.8 mm (6.3 in) |
| 2011 | 66.5 mm (2.6 in) |
| 2012 | n/a |
| 2013 | n/a |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1936 | 20 days |
| 1937 | 16 days |
| 1938 | 25 days |
| 1939 | 29 days |
| 1940 | 24 days |
| 1941 | 23 days |
| 1942 | 38 days |
| 1943 | 27 days |
| 1944 | 25 days |
| 1945 | 37 days |
| 1946 | 40 days |
| 1947 | 34 days |
| 1948 | 18 days |
| 1949 | 20 days |
| 1950 | 30 days |
| 1951 | 18 days |
| 1952 | 55 days |
| 1953 | 23 days |
| 1954 | 26 days |
| 1955 | 22 days |
| 1956 | 18 days |
| 1957 | 27 days |
| 1958 | 32 days |
| 1959 | 25 days |
| 1960 | 13 days |
| 1961 | 22 days |
| 1962 | 17 days |
| 1963 | 17 days |
| 1964 | 36 days |
| 1965 | 19 days |
| 1966 | 37 days |
| 1967 | 24 days |
| 1968 | 30 days |
| 1969 | 25 days |
| 1970 | 21 days |
| 1971 | 24 days |
| 1972 | 22 days |
| 1973 | 15 days |
| 1974 | 15 days |
| 1975 | 24 days |
| 1976 | 26 days |
| 1977 | 18 days |
| 1978 | 22 days |
| 1979 | 14 days |
| 1980 | 18 days |
| 1981 | 17 days |
| 1982 | 24 days |
| 1983 | 32 days |
| 1984 | 21 days |
| 1985 | 13 days |
| 1986 | 19 days |
| 1987 | 29 days |
| 1988 | 43 days |
| 1989 | 21 days |
| 1990 | 18 days |
| 1991 | 24 days |
| 1992 | 21 days |
| 1993 | 22 days |
| 1994 | 19 days |
| 1995 | 21 days |
| 1996 | 28 days |
| 1997 | 12 days |
| 1998 | 13 days |
| 1999 | 21 days |
| 2000 | 16 days |
| 2001 | 15 days |
| 2002 | 16 days |
| 2003 | 22 days |
| 2004 | 18 days |
| 2005 | 17 days |
| 2006 | 17 days |
| 2007 | 32 days |
| 2008 | 12 days |
| 2009 | 26 days |
| 2010 | 26 days |
| 2011 | 11 days |
| 2012 | n/a |
| 2013 | 1 day |
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
60 years with a frostAcross 60 years with a frost, the median last spring frost at Platteville falls on 6 May and the median first autumn frost on 3 October, which leaves a median of 152 days between them.
In 1979 to 2010 the median growing season was 155 days. That is 5 days more than in 1948 to 1978.
Fitted over all years, the growing season changes by +3.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1948 to 1978) | Recent period (1979 to 2010) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 6 May | 8 May | 2 May | 6 days earlier | -1.7 days per decade |
| First autumn frost | 3 October | 30 September | 4 October | 4 days later | +1.5 days per decade |
| Growing days | 152 days | 150 days | 155 days | 5 days more | +3.1 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
70 years, 1937 to 2010A day with at least 66.3 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 154.2 mm (6.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 66.3 mm (2.6 in) | |
| 5 years | 87.3 mm (3.4 in) | |
| 10 years | 102.1 mm (4.0 in) | |
| 25 years | 122.1 mm (4.8 in) | |
| 50 years | 137.8 mm (5.4 in) | |
| 100 years | 154.2 mm (6.1 in) | Longer than the 70 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, 70 years of values from 1937 to 2010.
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: 151.9 mm (6.0 in) in 2000; 135.9 mm (5.4 in) in 2003; 130.6 mm (5.1 in) in 1942.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Platteville, at 1954. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1954 ran 0.5 C (0.9 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1954 | -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.
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 (2025-12-31).