Lone Rock Tri Co AP Weather Records (USW00014921)
Record envelope, standing records and threshold days for Lone Rock Tri Co AP (USW00014921), Wisconsin, United States, with 79 years of record.
Key Facts for Lone Rock Tri Co AP
- Lone Rock Tri Co AP (USW00014921) is a weather station in Wisconsin, United States at 43.21 latitude and -90.19 longitude, 218 m (715 ft) above sea level.
- The station reports from 1948 to 2026, 79 years of record.
- 1,464 records set at Lone Rock Tri Co AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Lone Rock Tri Co AP tied a daily record high maximum temperature of 29.4 C (84.9 F) on 10 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, 43.21 latitude, -90.19 longitude.
- Elevation: 218 m (715 ft).
- Period of record: 1948 to 2026, 79 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) | -47.2 C (-53.0 F) | 13.3 C (55.9 F) | -27.8 C (-18.0 F) |
| Feb | 22.8 C (73.0 F) | -41.1 C (-42.0 F) | 17.2 C (63.0 F) | -20.6 C (-5.1 F) |
| Mar | 28.3 C (82.9 F) | -39.4 C (-38.9 F) | 26.7 C (80.1 F) | -21.7 C (-7.1 F) |
| Apr | 36.1 C (97.0 F) | -19.4 C (-2.9 F) | 28.3 C (82.9 F) | -7.8 C (18.0 F) |
| May | 36.1 C (97.0 F) | -6.1 C (21.0 F) | 31.1 C (88.0 F) | -2.8 C (27.0 F) |
| Jun | 37.2 C (99.0 F) | 1.1 C (34.0 F) | 33.3 C (91.9 F) | 7.2 C (45.0 F) |
| Jul | 38.9 C (102.0 F) | 4.4 C (39.9 F) | 37.2 C (99.0 F) | 8.3 C (46.9 F) |
| Aug | 38.3 C (100.9 F) | 2.8 C (37.0 F) | 30.6 C (87.1 F) | 8.9 C (48.0 F) |
| Sep | 37.8 C (100.0 F) | -6.7 C (19.9 F) | 31.7 C (89.1 F) | 4.4 C (39.9 F) |
| Oct | 34.4 C (93.9 F) | -13.3 C (8.1 F) | 29.4 C (84.9 F) | 2.8 C (37.0 F) |
| Nov | 25.6 C (78.1 F) | -27.8 C (-18.0 F) | n/a | n/a |
| Dec | 20.6 C (69.1 F) | -37.8 C (-36.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1948 | 14 |
| 1949 | 20 |
| 1950 | 37 |
| 1951 | 38 |
| 1952 | 29 |
| 1953 | 27 |
| 1954 | 22 |
| 1955 | 41 |
| 1956 | 23 |
| 1957 | 13 |
| 1958 | 22 |
| 1959 | 36 |
| 1960 | 27 |
| 1961 | 17 |
| 1962 | 43 |
| 1963 | 38 |
| 1964 | 38 |
| 1965 | 41 |
| 1966 | 23 |
| 1967 | 34 |
| 1968 | 20 |
| 1969 | 19 |
| 1970 | 16 |
| 1971 | 22 |
| 1972 | 23 |
| 1973 | 26 |
| 1974 | 21 |
| 1975 | 24 |
| 1976 | 28 |
| 1977 | 28 |
| 1978 | 14 |
| 1979 | 20 |
| 1980 | 15 |
| 1981 | 16 |
| 1982 | 28 |
| 2000 | 11 |
| 2001 | 14 |
| 2002 | 20 |
| 2003 | 17 |
| 2004 | 18 |
| 2005 | 20 |
| 2006 | 22 |
| 2007 | 24 |
| 2008 | 14 |
| 2009 | 16 |
| 2010 | 22 |
| 2011 | 18 |
| 2012 | 50 |
| 2013 | 9 |
| 2014 | 21 |
| 2015 | 20 |
| 2016 | 16 |
| 2017 | 31 |
| 2018 | 19 |
| 2019 | 23 |
| 2020 | 17 |
| 2021 | 25 |
| 2022 | 20 |
| 2023 | 30 |
| 2024 | 29 |
| 2025 | 20 |
| 2026 | 15 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1979-01-24 | Record snow depth | Record snow depth 68.6 cm (27.0 in) |
| 1979-01-27 | Record snow depth | Record snow depth 71.1 cm (28.0 in) |
| 1979-02-11 | Record snow depth | Record snow depth 73.7 cm (29.0 in) |
| 1979-02-12 | Record snow depth | Record snow depth 78.7 cm (31.0 in) |
| 1982-01-17 | Record low maximum temperature | Record low maximum temperature -26.1 C (-15.0 F) |
| 2011-07-01 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 2012-07-04 | Record high maximum temperature | Record high maximum temperature 38.9 C (102.0 F) |
| 2013-06-22 | Record daily precipitation | Record daily precipitation 131.8 mm (5.2 in) |
| 2026-06-30 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
Wettest Day of Each Month
Jun: 131.8 mm (5.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 29.5 mm (1.2 in) | 24 January 1967 |
| Feb | 34.8 mm (1.4 in) | 27 February 2023 |
| Mar | 40.9 mm (1.6 in) | 19 March 2020 |
| Apr | 80.3 mm (3.2 in) | 12 April 2014 |
| May | 80.3 mm (3.2 in) | 21 May 2004 |
| Jun | 131.8 mm (5.2 in) | 22 June 2013 |
| Jul | 92.5 mm (3.6 in) | 14 July 2020 |
| Aug | 116.6 mm (4.6 in) | 27 August 1959 |
| Sep | 106.4 mm (4.2 in) | 12 September 1961 |
| Oct | 102.4 mm (4.0 in) | 22 October 2020 |
| Nov | 66.5 mm (2.6 in) | 2 November 1961 |
| Dec | 44.2 mm (1.7 in) | 13 December 2015 |
Period of Record Coverage
1948 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1948 | 214 | 58% | No |
| 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 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 348 | 95% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 29 | 8% | No |
| 2000 | 92 | 25% | No |
| 2001 | 364 | 100% | Yes |
| 2002 | 363 | 99% | Yes |
| 2003 | 359 | 98% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 320 | 87% | No |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 363 | 99% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 362 | 99% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 359 | 98% | Yes |
| 2019 | 364 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 363 | 99% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 352 | 96% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 10 October 2026 | Lone Rock Tri Co AP, US | daily high max (Tie, Provisional) | 29.4 C (84.9 F) | tie | 64 years | 6 of 100 (Routine) |
| 31 July 2026 | Lone Rock Tri Co AP, US | daily low max | 20.6 C (69.1 F) | 0.5 C (0.9 F) | 48 years | 22 of 100 (Routine) |
| 27 July 2026 | Lone Rock Tri Co AP, US | daily high max (Tie) | 37.2 C (99.0 F) | tie | 71 years | 7 of 100 (Routine) |
| 27 July 2026 | Lone Rock Tri Co AP, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 71 years | 7 of 100 (Routine) |
| 23 July 2026 | Lone Rock Tri Co AP, US | daily low min (Tie) | 8.3 C (46.9 F) | tie | 68 years | 6 of 100 (Routine) |
| 2 July 2026 | Lone Rock Tri Co AP, US | daily rain | 72.9 mm (2.9 in) | 10.2 mm (0.4 in) | 1 year | 14 of 100 (Routine) |
| 30 June 2026 | Lone Rock Tri Co AP, US | all-time high min | 26.7 C (80.1 F) | 0.6 C (1.1 F) | 14 years | 32 of 100 (Routine) |
| 29 June 2026 | Lone Rock Tri Co AP, US | daily high min | 22.8 C (73.0 F) | 1.1 C (2.0 F) | 44 years | 22 of 100 (Routine) |
| 9 June 2026 | Lone Rock Tri Co AP, US | daily high min | 21.1 C (70.0 F) | 1.7 C (3.1 F) | 57 years | 28 of 100 (Routine) |
| 15 May 2026 | Lone Rock Tri Co AP, US | daily rain | 33.3 mm (1.3 in) | 7.6 mm (0.30 in) | 61 years | 32 of 100 (Routine) |
| 7 May 2026 | Lone Rock Tri Co AP, US | daily low min (Tie) | -2.8 C (27.0 F) | tie | 72 years | 7 of 100 (Routine) |
| 6 May 2026 | Lone Rock Tri Co AP, US | daily low max | 11.7 C (53.1 F) | 0.5 C (0.9 F) | 69 years | 27 of 100 (Routine) |
| 14 April 2026 | Lone Rock Tri Co AP, US | daily high min | 14.4 C (57.9 F) | 2.7 C (4.9 F) | 23 years | 18 of 100 (Routine) |
| 13 April 2026 | Lone Rock Tri Co AP, US | daily high min (Tie) | 13.9 C (57.0 F) | tie | 57 years | 6 of 100 (Routine) |
| 2 April 2026 | Lone Rock Tri Co AP, US | daily rain | 39.1 mm (1.5 in) | 15.7 mm (0.6 in) | 20 years | 28 of 100 (Routine) |
| 30 March 2026 | Lone Rock Tri Co AP, US | daily high max (Tie) | 26.7 C (80.1 F) | tie | 59 years | 6 of 100 (Routine) |
| 17 March 2026 | Lone Rock Tri Co AP, US | daily low max | -6.1 C (21.0 F) | 1.7 C (3.1 F) | 59 years | 26 of 100 (Routine) |
| 16 March 2026 | Lone Rock Tri Co AP, US | daily low max (Tie) | -2.8 C (27.0 F) | tie | 65 years | 6 of 100 (Routine) |
| 9 March 2026 | Lone Rock Tri Co AP, US | daily high max | 21.1 C (70.0 F) | 2.8 C (5.0 F) | 4 years | 12 of 100 (Routine) |
| 6 March 2026 | Lone Rock Tri Co AP, US | daily rain | 35.3 mm (1.4 in) | 17.3 mm (0.7 in) | 64 years | 52 of 100 (Notable) |
Climate Trend
57 complete years, 1949 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1949 | 8.1 C | +0.21 C |
| 1950 | 6.3 C | -1.65 C |
| 1951 | 5.7 C | -2.16 C |
| 1952 | 7.5 C | -0.39 C |
| 1953 | 8.4 C | +0.53 C |
| 1954 | 8.3 C | +0.43 C |
| 1955 | 7.8 C | -0.11 C |
| 1956 | 7.7 C | -0.22 C |
| 1957 | 7.8 C | -0.12 C |
| 1958 | 7.1 C | -0.76 C |
| 1959 | 6.7 C | -1.24 C |
| 1960 | 7.3 C | -0.62 C |
| 1961 | 7.7 C | -0.22 C |
| 1962 | 7.0 C | -0.92 C |
| 1963 | 7.1 C | -0.77 C |
| 1964 | 8.3 C | +0.38 C |
| 1965 | 7.4 C | -0.51 C |
| 1966 | 6.9 C | -1.03 C |
| 1967 | 6.8 C | -1.15 C |
| 1968 | 7.9 C | -0.04 C |
| 1969 | 7.0 C | -0.94 C |
| 1970 | 7.3 C | -0.63 C |
| 1971 | 7.5 C | -0.38 C |
| 1972 | 6.8 C | -1.09 C |
| 1973 | 9.1 C | +1.22 C |
| 1975 | 7.3 C | -0.57 C |
| 1976 | 6.4 C | -1.47 C |
| 1977 | 7.1 C | -0.82 C |
| 1978 | 6.2 C | -1.69 C |
| 1979 | 6.2 C | -1.68 C |
| 1980 | 7.2 C | -0.75 C |
| 1981 | 7.9 C | -0.01 C |
| 1982 | 6.9 C | -1.01 C |
| 2001 | 8.5 C | +0.55 C |
| 2002 | 8.5 C | +0.57 C |
| 2003 | 7.8 C | -0.12 C |
| 2004 | 8.1 C | +0.23 C |
| 2005 | 8.5 C | +0.60 C |
| 2006 | 9.1 C | +1.20 C |
| 2007 | 8.4 C | +0.54 C |
| 2009 | 7.6 C | -0.28 C |
| 2010 | 9.2 C | +1.29 C |
| 2011 | 9.0 C | +1.08 C |
| 2012 | 10.4 C | +2.45 C |
| 2013 | 7.7 C | -0.25 C |
| 2014 | 7.7 C | -0.23 C |
| 2015 | 8.8 C | +0.90 C |
| 2016 | 9.6 C | +1.65 C |
| 2017 | 9.3 C | +1.38 C |
| 2018 | 8.4 C | +0.46 C |
| 2019 | 7.9 C | +0.01 C |
| 2020 | 8.9 C | +1.00 C |
| 2021 | 9.0 C | +1.10 C |
| 2022 | 8.4 C | +0.50 C |
| 2023 | 9.9 C | +1.95 C |
| 2024 | 10.4 C | +2.45 C |
| 2025 | 9.0 C | +1.07 C |
The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1949 to 2025. In Fahrenheit: 0.5 F (0.3 to 0.6) per decade. The slope is a straight line fitted to 57 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.3 to 0.6) per decade | 1949 to 2025 | 57 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.1 to 0.5) per decade | 1949 to 2025 | 57 | Rise |
| Mean daily minimum | 0.4 C (0.3 to 0.5) per decade | 0.7 F (0.5 to 0.8) per decade | 1949 to 2025 | 57 | 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) | 38.9 C (102.0 F) | 2012 | 35.0 C (95.0 F) | 63 |
| Coldest night (TNn) | -47.2 C (-53.0 F) | 1951 | -30.5 C (-22.9 F) | 63 |
| Wettest day (Rx1day) | 131.8 mm (5.2 in) | 2013 | 62.2 mm (2.4 in) | 63 |
| Wettest five days (Rx5day) | 207.2 mm (8.2 in) | 2008 | 91.4 mm (3.6 in) | 63 |
| Longest dry spell (CDD) | 46 days | 2015 | 22 days | 63 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1948 | 38.3 C (100.9 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 32.2 C (90.0 F) |
| 1951 | 32.2 C (90.0 F) |
| 1952 | 35.6 C (96.1 F) |
| 1953 | 36.7 C (98.1 F) |
| 1954 | 35.6 C (96.1 F) |
| 1955 | 38.3 C (100.9 F) |
| 1956 | 35.0 C (95.0 F) |
| 1957 | 33.9 C (93.0 F) |
| 1958 | 35.0 C (95.0 F) |
| 1959 | 34.4 C (93.9 F) |
| 1960 | 35.0 C (95.0 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 33.9 C (93.0 F) |
| 1963 | 36.7 C (98.1 F) |
| 1964 | 36.7 C (98.1 F) |
| 1965 | 37.2 C (99.0 F) |
| 1966 | 36.1 C (97.0 F) |
| 1967 | 33.9 C (93.0 F) |
| 1968 | 35.0 C (95.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 35.0 C (95.0 F) |
| 1971 | 35.0 C (95.0 F) |
| 1972 | 33.9 C (93.0 F) |
| 1973 | 33.9 C (93.0 F) |
| 1974 | 35.6 C (96.1 F) |
| 1975 | 33.9 C (93.0 F) |
| 1976 | 36.7 C (98.1 F) |
| 1977 | 36.7 C (98.1 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 33.3 C (91.9 F) |
| 1980 | 37.2 C (99.0 F) |
| 1981 | 35.0 C (95.0 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 3.9 C (39.0 F) |
| 2000 | 26.7 C (80.1 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 35.0 C (95.0 F) |
| 2003 | 36.1 C (97.0 F) |
| 2004 | 31.7 C (89.1 F) |
| 2005 | 34.4 C (93.9 F) |
| 2006 | 35.0 C (95.0 F) |
| 2007 | 33.3 C (91.9 F) |
| 2008 | 32.8 C (91.0 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 34.4 C (93.9 F) |
| 2011 | 37.2 C (99.0 F) |
| 2012 | 38.9 C (102.0 F) |
| 2013 | 35.6 C (96.1 F) |
| 2014 | 35.6 C (96.1 F) |
| 2015 | 35.0 C (95.0 F) |
| 2016 | 33.9 C (93.0 F) |
| 2017 | 34.4 C (93.9 F) |
| 2018 | 36.1 C (97.0 F) |
| 2019 | 33.3 C (91.9 F) |
| 2020 | 33.9 C (93.0 F) |
| 2021 | 34.4 C (93.9 F) |
| 2022 | 35.0 C (95.0 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 35.6 C (96.1 F) |
| 2025 | 34.4 C (93.9 F) |
| 2026 | 37.2 C (99.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1948 | -25.0 C (-13.0 F) |
| 1949 | -32.2 C (-26.0 F) |
| 1950 | -37.8 C (-36.0 F) |
| 1951 | -47.2 C (-53.0 F) |
| 1952 | -29.4 C (-20.9 F) |
| 1953 | -26.1 C (-15.0 F) |
| 1954 | -26.7 C (-16.1 F) |
| 1955 | -28.9 C (-20.0 F) |
| 1956 | -28.9 C (-20.0 F) |
| 1957 | -28.9 C (-20.0 F) |
| 1958 | -31.7 C (-25.1 F) |
| 1959 | -37.8 C (-36.0 F) |
| 1960 | -26.7 C (-16.1 F) |
| 1961 | -31.1 C (-24.0 F) |
| 1962 | -39.4 C (-38.9 F) |
| 1963 | -43.3 C (-45.9 F) |
| 1964 | -26.1 C (-15.0 F) |
| 1965 | -33.9 C (-29.0 F) |
| 1966 | -31.7 C (-25.1 F) |
| 1967 | -35.6 C (-32.1 F) |
| 1968 | -28.9 C (-20.0 F) |
| 1969 | -30.0 C (-22.0 F) |
| 1970 | -34.4 C (-29.9 F) |
| 1971 | -35.0 C (-31.0 F) |
| 1972 | -32.8 C (-27.0 F) |
| 1973 | -30.0 C (-22.0 F) |
| 1974 | -33.9 C (-29.0 F) |
| 1975 | -27.8 C (-18.0 F) |
| 1976 | -33.9 C (-29.0 F) |
| 1977 | -34.4 C (-29.9 F) |
| 1978 | -30.0 C (-22.0 F) |
| 1979 | -37.8 C (-36.0 F) |
| 1980 | -26.7 C (-16.1 F) |
| 1981 | -31.1 C (-24.0 F) |
| 1982 | -38.3 C (-36.9 F) |
| 1983 | -22.2 C (-8.0 F) |
| 2000 | -36.1 C (-33.0 F) |
| 2001 | -27.2 C (-17.0 F) |
| 2002 | -31.1 C (-24.0 F) |
| 2003 | -25.0 C (-13.0 F) |
| 2004 | -26.7 C (-16.1 F) |
| 2005 | -27.8 C (-18.0 F) |
| 2006 | -27.7 C (-17.9 F) |
| 2007 | -32.7 C (-26.9 F) |
| 2008 | -34.3 C (-29.7 F) |
| 2009 | -37.1 C (-34.8 F) |
| 2010 | -28.2 C (-18.8 F) |
| 2011 | -32.1 C (-25.8 F) |
| 2012 | -28.8 C (-19.8 F) |
| 2013 | -30.5 C (-22.9 F) |
| 2014 | -31.0 C (-23.8 F) |
| 2015 | -29.3 C (-20.7 F) |
| 2016 | -31.0 C (-23.8 F) |
| 2017 | -24.3 C (-11.7 F) |
| 2018 | -28.2 C (-18.8 F) |
| 2019 | -39.3 C (-38.7 F) |
| 2020 | -29.3 C (-20.7 F) |
| 2021 | -30.5 C (-22.9 F) |
| 2022 | -33.2 C (-27.8 F) |
| 2023 | -31.0 C (-23.8 F) |
| 2024 | -27.7 C (-17.9 F) |
| 2025 | -29.3 C (-20.7 F) |
| 2026 | -27.8 C (-18.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 33.0 mm (1.3 in) |
| 1949 | 54.1 mm (2.1 in) |
| 1950 | 54.9 mm (2.2 in) |
| 1951 | 57.9 mm (2.3 in) |
| 1952 | 70.1 mm (2.8 in) |
| 1953 | 80.5 mm (3.2 in) |
| 1954 | 65.0 mm (2.6 in) |
| 1955 | 42.2 mm (1.7 in) |
| 1956 | 71.9 mm (2.8 in) |
| 1957 | 40.9 mm (1.6 in) |
| 1958 | 42.4 mm (1.7 in) |
| 1959 | 116.6 mm (4.6 in) |
| 1960 | 55.6 mm (2.2 in) |
| 1961 | 106.4 mm (4.2 in) |
| 1962 | 64.0 mm (2.5 in) |
| 1963 | 37.1 mm (1.5 in) |
| 1964 | 45.7 mm (1.8 in) |
| 1965 | 90.9 mm (3.6 in) |
| 1966 | 69.9 mm (2.8 in) |
| 1967 | 64.5 mm (2.5 in) |
| 1968 | 44.5 mm (1.8 in) |
| 1969 | 42.2 mm (1.7 in) |
| 1970 | 46.7 mm (1.8 in) |
| 1971 | 38.6 mm (1.5 in) |
| 1972 | 65.5 mm (2.6 in) |
| 1973 | 39.4 mm (1.6 in) |
| 1974 | 38.4 mm (1.5 in) |
| 1975 | 58.2 mm (2.3 in) |
| 1976 | 62.7 mm (2.5 in) |
| 1977 | 47.2 mm (1.9 in) |
| 1978 | 92.2 mm (3.6 in) |
| 1979 | 49.3 mm (1.9 in) |
| 1980 | 68.8 mm (2.7 in) |
| 1981 | 78.2 mm (3.1 in) |
| 1982 | 67.1 mm (2.6 in) |
| 1983 | 2.5 mm (0.10 in) |
| 2000 | 14.7 mm (0.6 in) |
| 2001 | 46.5 mm (1.8 in) |
| 2002 | 60.5 mm (2.4 in) |
| 2003 | 62.5 mm (2.5 in) |
| 2004 | 80.3 mm (3.2 in) |
| 2005 | 45.0 mm (1.8 in) |
| 2006 | 63.2 mm (2.5 in) |
| 2007 | 97.5 mm (3.8 in) |
| 2008 | 102.1 mm (4.0 in) |
| 2009 | 26.7 mm (1.1 in) |
| 2010 | 78.5 mm (3.1 in) |
| 2011 | 41.7 mm (1.6 in) |
| 2012 | 57.9 mm (2.3 in) |
| 2013 | 131.8 mm (5.2 in) |
| 2014 | 80.3 mm (3.2 in) |
| 2015 | 61.2 mm (2.4 in) |
| 2016 | 55.9 mm (2.2 in) |
| 2017 | 62.2 mm (2.4 in) |
| 2018 | 62.2 mm (2.4 in) |
| 2019 | 81.5 mm (3.2 in) |
| 2020 | 102.4 mm (4.0 in) |
| 2021 | 40.4 mm (1.6 in) |
| 2022 | 63.2 mm (2.5 in) |
| 2023 | 40.6 mm (1.6 in) |
| 2024 | 62.7 mm (2.5 in) |
| 2025 | 74.4 mm (2.9 in) |
| 2026 | 72.9 mm (2.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 49.0 mm (1.9 in) |
| 1949 | 109.9 mm (4.3 in) |
| 1950 | 129.1 mm (5.1 in) |
| 1951 | 63.5 mm (2.5 in) |
| 1952 | 131.8 mm (5.2 in) |
| 1953 | 113.3 mm (4.5 in) |
| 1954 | 130.8 mm (5.1 in) |
| 1955 | 48.8 mm (1.9 in) |
| 1956 | 102.9 mm (4.1 in) |
| 1957 | 48.2 mm (1.9 in) |
| 1958 | 47.8 mm (1.9 in) |
| 1959 | 135.1 mm (5.3 in) |
| 1960 | 92.2 mm (3.6 in) |
| 1961 | 149.8 mm (5.9 in) |
| 1962 | 81.0 mm (3.2 in) |
| 1963 | 49.1 mm (1.9 in) |
| 1964 | 82.8 mm (3.3 in) |
| 1965 | 126.0 mm (5.0 in) |
| 1966 | 132.8 mm (5.2 in) |
| 1967 | 106.5 mm (4.2 in) |
| 1968 | 112.6 mm (4.4 in) |
| 1969 | 104.2 mm (4.1 in) |
| 1970 | 68.8 mm (2.7 in) |
| 1971 | 58.0 mm (2.3 in) |
| 1972 | 77.9 mm (3.1 in) |
| 1973 | 58.9 mm (2.3 in) |
| 1974 | 48.5 mm (1.9 in) |
| 1975 | 72.6 mm (2.9 in) |
| 1976 | 66.5 mm (2.6 in) |
| 1977 | 73.4 mm (2.9 in) |
| 1978 | 112.8 mm (4.4 in) |
| 1979 | 76.2 mm (3.0 in) |
| 1980 | 109.2 mm (4.3 in) |
| 1981 | 110.2 mm (4.3 in) |
| 1982 | 94.5 mm (3.7 in) |
| 1983 | 11.7 mm (0.5 in) |
| 2000 | 21.4 mm (0.8 in) |
| 2001 | 84.9 mm (3.3 in) |
| 2002 | 95.8 mm (3.8 in) |
| 2003 | 83.3 mm (3.3 in) |
| 2004 | 118.1 mm (4.6 in) |
| 2005 | 89.7 mm (3.5 in) |
| 2006 | 91.4 mm (3.6 in) |
| 2007 | 189.4 mm (7.5 in) |
| 2008 | 207.2 mm (8.2 in) |
| 2009 | 52.9 mm (2.1 in) |
| 2010 | 102.9 mm (4.1 in) |
| 2011 | 69.4 mm (2.7 in) |
| 2012 | 82.3 mm (3.2 in) |
| 2013 | 193.3 mm (7.6 in) |
| 2014 | 158.8 mm (6.3 in) |
| 2015 | 84.6 mm (3.3 in) |
| 2016 | 85.2 mm (3.4 in) |
| 2017 | 104.6 mm (4.1 in) |
| 2018 | 113.7 mm (4.5 in) |
| 2019 | 135.8 mm (5.3 in) |
| 2020 | 117.5 mm (4.6 in) |
| 2021 | 58.2 mm (2.3 in) |
| 2022 | 68.3 mm (2.7 in) |
| 2023 | 66.3 mm (2.6 in) |
| 2024 | 111.2 mm (4.4 in) |
| 2025 | 86.6 mm (3.4 in) |
| 2026 | 94.0 mm (3.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 12 days |
| 1949 | 27 days |
| 1950 | 30 days |
| 1951 | 16 days |
| 1952 | 30 days |
| 1953 | 30 days |
| 1954 | 21 days |
| 1955 | 16 days |
| 1956 | 18 days |
| 1957 | 27 days |
| 1958 | 33 days |
| 1959 | 23 days |
| 1960 | 23 days |
| 1961 | 25 days |
| 1962 | 18 days |
| 1963 | 22 days |
| 1964 | 25 days |
| 1965 | 17 days |
| 1966 | 25 days |
| 1967 | 23 days |
| 1968 | 23 days |
| 1969 | 23 days |
| 1970 | 20 days |
| 1971 | 14 days |
| 1972 | 19 days |
| 1973 | 19 days |
| 1974 | 14 days |
| 1975 | 22 days |
| 1976 | 26 days |
| 1977 | 17 days |
| 1978 | 24 days |
| 1979 | 25 days |
| 1980 | 25 days |
| 1981 | 30 days |
| 1982 | 18 days |
| 1983 | 9 days |
| 2000 | 30 days |
| 2001 | 25 days |
| 2002 | 15 days |
| 2003 | 22 days |
| 2004 | 19 days |
| 2005 | 17 days |
| 2006 | 19 days |
| 2007 | 22 days |
| 2008 | 17 days |
| 2009 | 27 days |
| 2010 | 29 days |
| 2011 | 16 days |
| 2012 | 28 days |
| 2013 | 19 days |
| 2014 | 16 days |
| 2015 | 46 days |
| 2016 | 26 days |
| 2017 | 40 days |
| 2018 | 23 days |
| 2019 | 26 days |
| 2020 | 17 days |
| 2021 | 20 days |
| 2022 | 28 days |
| 2023 | 18 days |
| 2024 | 18 days |
| 2025 | 21 days |
| 2026 | 28 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
57 years with a frostAcross 57 years with a frost, the median last spring frost at Lone Rock Tri Co AP falls on 9 May and the median first autumn frost on 2 October, which leaves a median of 145 days between them.
Fitted over all years, the growing season changes by +2.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1977 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 9 May | n/a | 8 May | n/a | -0.4 days per decade |
| First autumn frost | 2 October | n/a | 6 October | n/a | +2.0 days per decade |
| Growing days | 145 days | n/a | 151 days | n/a | +2.4 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
58 years, 1949 to 2025A day with at least 59.1 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 131.9 mm (5.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 59.1 mm (2.3 in) | |
| 5 years | 77.9 mm (3.1 in) | |
| 10 years | 90.6 mm (3.6 in) | |
| 25 years | 107.0 mm (4.2 in) | |
| 50 years | 119.4 mm (4.7 in) | |
| 100 years | 131.9 mm (5.2 in) | Longer than the 58 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, 58 years of values from 1949 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: 131.8 mm (5.2 in) in 2013; 116.6 mm (4.6 in) in 1959; 106.4 mm (4.2 in) in 1961.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Lone Rock Tri Co AP had a mean temperature of 8.9 C (48.1 F) and 821.6 mm (32.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Wheatfield (United States, 342 km away), Beloit (United States, 123 km away) and Mt Mary College (United States, 176 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Wheatfield | United States | 342 km (213 mi) | 9.2 C (48.5 F) | 902.5 mm (35.5 in) | 0.75 |
| Beloit | United States | 123 km (76 mi) | 9.1 C (48.5 F) | 852.3 mm (33.6 in) | 0.75 |
| Mt Mary College | United States | 176 km (109 mi) | 9.0 C (48.2 F) | 787.2 mm (31.0 in) | 0.77 |
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).