Black Rock Weather Records (USC00420730)
Record envelope, standing records and threshold days for Black Rock (USC00420730), Utah, United States, with 127 years of record.
Key Facts for Black Rock
- Black Rock (USC00420730) is a weather station in Utah, United States at 38.71 latitude and -112.95 longitude, 1,498 m (4,916 ft) above sea level.
- The station reports from 1900 to 2026, 127 years of record.
- 1,464 records set at Black Rock still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Black Rock set a daily record precipitation of 15.2 mm (0.6 in) on 31 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Utah, United States, 38.71 latitude, -112.95 longitude.
- Elevation: 1,498 m (4,916 ft).
- Period of record: 1900 to 2026, 127 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
24 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.0 C (68.0 F) | -36.1 C (-33.0 F) | 14.4 C (57.9 F) | -16.7 C (1.9 F) |
| Feb | 23.9 C (75.0 F) | -33.3 C (-27.9 F) | 21.1 C (70.0 F) | -16.1 C (3.0 F) |
| Mar | 32.8 C (91.0 F) | -25.0 C (-13.0 F) | 32.8 C (91.0 F) | -8.9 C (16.0 F) |
| Apr | 33.9 C (93.0 F) | -17.8 C (0.0 F) | 29.4 C (84.9 F) | -9.4 C (15.1 F) |
| May | 37.2 C (99.0 F) | -8.3 C (17.1 F) | 36.1 C (97.0 F) | -1.1 C (30.0 F) |
| Jun | 41.1 C (106.0 F) | -4.4 C (24.1 F) | 38.9 C (102.0 F) | 3.3 C (37.9 F) |
| Jul | 42.2 C (108.0 F) | -1.1 C (30.0 F) | 41.7 C (107.1 F) | 7.8 C (46.0 F) |
| Aug | 41.1 C (106.0 F) | -2.2 C (28.0 F) | 41.1 C (106.0 F) | 10.0 C (50.0 F) |
| Sep | 38.9 C (102.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Oct | 32.2 C (90.0 F) | -21.1 C (-6.0 F) | n/a | n/a |
| Nov | 26.7 C (80.1 F) | -28.3 C (-18.9 F) | n/a | n/a |
| Dec | 21.7 C (71.1 F) | -38.3 C (-36.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1901 | 5 |
| 1902 | 18 |
| 1903 | 30 |
| 1904 | 9 |
| 1905 | 12 |
| 1906 | 9 |
| 1907 | 9 |
| 1910 | 8 |
| 1911 | 24 |
| 1912 | 20 |
| 1913 | 29 |
| 1914 | 7 |
| 1915 | 14 |
| 1916 | 41 |
| 1917 | 22 |
| 1918 | 45 |
| 1919 | 11 |
| 1920 | 19 |
| 1921 | 16 |
| 1922 | 28 |
| 1923 | 10 |
| 1924 | 42 |
| 1925 | 14 |
| 1926 | 7 |
| 1927 | 18 |
| 1928 | 6 |
| 1929 | 5 |
| 1951 | 6 |
| 1952 | 26 |
| 1953 | 14 |
| 1954 | 6 |
| 1955 | 16 |
| 1956 | 14 |
| 1957 | 6 |
| 1958 | 6 |
| 1959 | 9 |
| 1960 | 33 |
| 1961 | 10 |
| 1962 | 20 |
| 1963 | 11 |
| 1964 | 26 |
| 1965 | 18 |
| 1966 | 12 |
| 1967 | 15 |
| 1968 | 15 |
| 1969 | 14 |
| 1970 | 15 |
| 1971 | 15 |
| 1972 | 12 |
| 1973 | 16 |
| 1974 | 6 |
| 1975 | 17 |
| 1976 | 6 |
| 1977 | 12 |
| 1978 | 15 |
| 1979 | 5 |
| 1980 | 13 |
| 1981 | 12 |
| 1982 | 8 |
| 1983 | 6 |
| 1984 | 10 |
| 1985 | 13 |
| 1986 | 12 |
| 1987 | 8 |
| 1988 | 16 |
| 1989 | 19 |
| 1990 | 15 |
| 1991 | 8 |
| 1992 | 12 |
| 1993 | 4 |
| 1994 | 8 |
| 1995 | 15 |
| 1996 | 13 |
| 1997 | 11 |
| 1998 | 5 |
| 1999 | 11 |
| 2000 | 10 |
| 2001 | 12 |
| 2002 | 10 |
| 2003 | 9 |
| 2004 | 6 |
| 2005 | 9 |
| 2006 | 18 |
| 2007 | 11 |
| 2008 | 8 |
| 2009 | 14 |
| 2010 | 15 |
| 2011 | 11 |
| 2012 | 16 |
| 2013 | 16 |
| 2014 | 7 |
| 2015 | 10 |
| 2016 | 21 |
| 2017 | 19 |
| 2018 | 20 |
| 2019 | 22 |
| 2020 | 17 |
| 2021 | 14 |
| 2022 | 15 |
| 2023 | 9 |
| 2024 | 9 |
| 2025 | 20 |
| 2026 | 23 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1985-03-28 | Record snow depth | Record snow depth 40.6 cm (16.0 in) |
| 1988-01-18 | Record daily snowfall | Record daily snowfall 43.2 cm (17.0 in) |
| 1988-01-18 | Record snow depth | Record snow depth 61.0 cm (24.0 in) |
| 1988-03-16 | Record daily snowfall | Record daily snowfall 47.8 cm (18.8 in) |
| 1990-12-23 | Record low maximum temperature | Record low maximum temperature -18.9 C (-2.0 F) |
| 1990-12-23 | Record low minimum temperature | Record low minimum temperature -38.3 C (-36.9 F) |
| 2010-12-21 | Record daily snowfall | Record daily snowfall 50.8 cm (20.0 in) |
| 2022-07-22 | Record high maximum temperature | Record high maximum temperature 41.7 C (107.1 F) |
| 2023-07-17 | Record high maximum temperature | Record high maximum temperature 42.2 C (108.0 F) |
Wettest Day of Each Month
Jul: 80.3 mm (3.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 27.2 mm (1.1 in) | 3 January 1997 |
| Feb | 40.6 mm (1.6 in) | 11 February 1915 |
| Mar | 44.7 mm (1.8 in) | 24 March 1959 |
| Apr | 32.0 mm (1.3 in) | 11 April 1914 |
| May | 48.3 mm (1.9 in) | 20 May 1975 |
| Jun | 48.5 mm (1.9 in) | 30 June 1956 |
| Jul | 80.3 mm (3.2 in) | 29 July 1969 |
| Aug | 54.4 mm (2.1 in) | 1 August 2021 |
| Sep | 38.4 mm (1.5 in) | 27 September 2014 |
| Oct | 40.6 mm (1.6 in) | 6 October 1916 |
| Nov | 47.5 mm (1.9 in) | 3 November 1925 |
| Dec | 38.1 mm (1.5 in) | 21 December 1998 |
Period of Record Coverage
1900 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1900 | 31 | 8% | No |
| 1901 | 363 | 99% | Yes |
| 1902 | 354 | 97% | Yes |
| 1903 | 365 | 100% | Yes |
| 1904 | 364 | 99% | Yes |
| 1905 | 300 | 82% | No |
| 1906 | 214 | 59% | No |
| 1907 | 207 | 57% | No |
| 1910 | 358 | 98% | Yes |
| 1911 | 339 | 93% | Yes |
| 1912 | 343 | 94% | Yes |
| 1913 | 364 | 100% | Yes |
| 1914 | 348 | 95% | Yes |
| 1915 | 332 | 91% | Yes |
| 1916 | 328 | 90% | No |
| 1917 | 351 | 96% | Yes |
| 1918 | 348 | 95% | Yes |
| 1919 | 291 | 80% | No |
| 1920 | 317 | 87% | No |
| 1921 | 342 | 94% | Yes |
| 1922 | 359 | 98% | Yes |
| 1923 | 348 | 95% | Yes |
| 1924 | 332 | 91% | Yes |
| 1925 | 287 | 79% | No |
| 1926 | 363 | 99% | Yes |
| 1927 | 292 | 80% | No |
| 1928 | 294 | 80% | No |
| 1929 | 148 | 41% | No |
| 1951 | 254 | 70% | No |
| 1952 | 366 | 100% | Yes |
| 1953 | 356 | 98% | Yes |
| 1954 | 343 | 94% | Yes |
| 1955 | 342 | 94% | Yes |
| 1956 | 347 | 95% | Yes |
| 1957 | 356 | 98% | Yes |
| 1958 | 346 | 95% | Yes |
| 1959 | 358 | 98% | Yes |
| 1960 | 359 | 98% | Yes |
| 1961 | 363 | 99% | Yes |
| 1962 | 361 | 99% | Yes |
| 1963 | 362 | 99% | Yes |
| 1964 | 361 | 99% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 362 | 99% | Yes |
| 1968 | 361 | 99% | Yes |
| 1969 | 362 | 99% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 335 | 92% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 363 | 99% | Yes |
| 1982 | 360 | 99% | Yes |
| 1983 | 359 | 98% | Yes |
| 1984 | 359 | 98% | Yes |
| 1985 | 361 | 99% | Yes |
| 1986 | 358 | 98% | Yes |
| 1987 | 360 | 99% | Yes |
| 1988 | 362 | 99% | Yes |
| 1989 | 362 | 99% | Yes |
| 1990 | 360 | 99% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 363 | 99% | Yes |
| 1993 | 357 | 98% | Yes |
| 1994 | 358 | 98% | Yes |
| 1995 | 361 | 99% | Yes |
| 1996 | 360 | 98% | Yes |
| 1997 | 358 | 98% | Yes |
| 1998 | 355 | 97% | Yes |
| 1999 | 358 | 98% | Yes |
| 2000 | 361 | 99% | Yes |
| 2001 | 359 | 98% | Yes |
| 2002 | 361 | 99% | Yes |
| 2003 | 361 | 99% | Yes |
| 2004 | 356 | 97% | Yes |
| 2005 | 361 | 99% | Yes |
| 2006 | 363 | 99% | Yes |
| 2007 | 362 | 99% | Yes |
| 2008 | 362 | 99% | Yes |
| 2009 | 363 | 99% | Yes |
| 2010 | 363 | 99% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 364 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 364 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 243 | 67% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 31 August 2026 | Black Rock, US | daily rain (Provisional) | 15.2 mm (0.6 in) | 9.9 mm (0.39 in) | 112 years | 20 of 100 (Routine) |
| 20 August 2026 | Black Rock, US | daily high max (Tie, Provisional) | 38.3 C (100.9 F) | tie | 5 years | 2 of 100 (Routine) |
| 19 August 2026 | Black Rock, US | daily high min (Tie, Provisional) | 16.1 C (61.0 F) | tie | 73 years | 8 of 100 (Routine) |
| 19 August 2026 | Black Rock, US | daily high max (Tie, Provisional) | 37.8 C (100.0 F) | tie | 65 years | 7 of 100 (Routine) |
| 9 August 2026 | Black Rock, US | daily high max (Tie) | 37.8 C (100.0 F) | tie | 97 years | 9 of 100 (Routine) |
| 8 August 2026 | Black Rock, US | daily high max | 40.0 C (104.0 F) | 0.6 C (1.1 F) | 65 years | 31 of 100 (Routine) |
| 2 August 2026 | Black Rock, US | monthly high max (Tie) | 41.1 C (106.0 F) | tie | 0 years | 5 of 100 (Routine) |
| 1 August 2026 | Black Rock, US | monthly high max | 41.1 C (106.0 F) | 0.5 C (0.9 F) | 63 years | 40 of 100 (Notable) |
| 12 July 2026 | Black Rock, US | daily high max | 41.7 C (107.1 F) | 1.1 C (2.0 F) | 5 years | 14 of 100 (Routine) |
| 24 June 2026 | Black Rock, US | daily high min | 20.6 C (69.1 F) | 2.3 C (4.1 F) | 1 year | 15 of 100 (Routine) |
| 5 June 2026 | Black Rock, US | daily high max (Tie) | 37.2 C (99.0 F) | tie | 9 years | 3 of 100 (Routine) |
| 4 June 2026 | Black Rock, US | daily high max | 37.2 C (99.0 F) | 0.5 C (0.9 F) | 4 years | 12 of 100 (Routine) |
| 12 May 2026 | Black Rock, US | daily high max | 36.1 C (97.0 F) | 2.8 C (5.0 F) | 29 years | 23 of 100 (Routine) |
| 11 May 2026 | Black Rock, US | daily high max | 35.0 C (95.0 F) | 1.1 C (2.0 F) | 65 years | 31 of 100 (Routine) |
| 31 March 2026 | Black Rock, US | daily high min | 8.9 C (48.0 F) | 2.2 C (4.0 F) | 123 years | 44 of 100 (Notable) |
| 30 March 2026 | Black Rock, US | daily high max | 27.2 C (81.0 F) | 0.5 C (0.9 F) | 56 years | 27 of 100 (Routine) |
| 29 March 2026 | Black Rock, US | daily high max | 30.0 C (86.0 F) | 3.9 C (7.0 F) | 48 years | 30 of 100 (Routine) |
| 26 March 2026 | Black Rock, US | daily high min | 8.9 C (48.0 F) | 1.7 C (3.1 F) | 55 years | 29 of 100 (Routine) |
| 26 March 2026 | Black Rock, US | daily high max (Tie) | 28.3 C (82.9 F) | tie | 0 years | 2 of 100 (Routine) |
| 25 March 2026 | Black Rock, US | monthly high max | 32.8 C (91.0 F) | 0.6 C (1.1 F) | 0 years | 21 of 100 (Routine) |
Climate Trend
83 complete years, 1901 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1901 | 9.4 C | -0.50 C |
| 1902 | 8.7 C | -1.16 C |
| 1903 | 7.7 C | -2.20 C |
| 1904 | 8.6 C | -1.25 C |
| 1910 | 10.4 C | +0.54 C |
| 1911 | 8.4 C | -1.47 C |
| 1912 | 8.1 C | -1.79 C |
| 1913 | 7.9 C | -1.99 C |
| 1914 | 9.2 C | -0.68 C |
| 1922 | 8.2 C | -1.72 C |
| 1926 | 9.9 C | +0.01 C |
| 1952 | 8.7 C | -1.24 C |
| 1953 | 9.8 C | -0.07 C |
| 1954 | 10.4 C | +0.54 C |
| 1956 | 10.1 C | +0.17 C |
| 1957 | 9.9 C | +0.00 C |
| 1958 | 10.3 C | +0.36 C |
| 1959 | 9.9 C | +0.04 C |
| 1960 | 10.8 C | +0.88 C |
| 1961 | 10.1 C | +0.24 C |
| 1962 | 9.4 C | -0.46 C |
| 1963 | 10.2 C | +0.29 C |
| 1964 | 8.8 C | -1.07 C |
| 1965 | 9.6 C | -0.28 C |
| 1966 | 10.0 C | +0.07 C |
| 1967 | 9.4 C | -0.46 C |
| 1968 | 9.5 C | -0.44 C |
| 1969 | 10.2 C | +0.32 C |
| 1970 | 9.7 C | -0.21 C |
| 1971 | 9.1 C | -0.80 C |
| 1973 | 9.1 C | -0.80 C |
| 1974 | 9.7 C | -0.22 C |
| 1975 | 8.5 C | -1.37 C |
| 1976 | 9.2 C | -0.68 C |
| 1977 | 10.2 C | +0.29 C |
| 1978 | 9.9 C | +0.04 C |
| 1979 | 9.4 C | -0.53 C |
| 1980 | 10.2 C | +0.31 C |
| 1981 | 10.8 C | +0.95 C |
| 1982 | 9.3 C | -0.64 C |
| 1983 | 10.1 C | +0.19 C |
| 1984 | 8.7 C | -1.22 C |
| 1985 | 9.0 C | -0.86 C |
| 1986 | 10.7 C | +0.79 C |
| 1987 | 9.7 C | -0.16 C |
| 1988 | 9.3 C | -0.64 C |
| 1989 | 9.2 C | -0.67 C |
| 1990 | 9.9 C | -0.02 C |
| 1991 | 9.1 C | -0.79 C |
| 1992 | 10.4 C | +0.55 C |
| 1993 | 9.3 C | -0.55 C |
| 1994 | 10.5 C | +0.56 C |
| 1995 | 10.4 C | +0.53 C |
| 1996 | 10.8 C | +0.95 C |
| 1997 | 10.1 C | +0.20 C |
| 1998 | 9.8 C | -0.08 C |
| 1999 | 10.4 C | +0.48 C |
| 2000 | 11.0 C | +1.08 C |
| 2001 | 10.8 C | +0.93 C |
| 2002 | 10.2 C | +0.28 C |
| 2003 | 10.9 C | +1.00 C |
| 2004 | 10.0 C | +0.11 C |
| 2005 | 10.3 C | +0.39 C |
| 2006 | 10.0 C | +0.12 C |
| 2007 | 9.9 C | +0.01 C |
| 2008 | 9.9 C | -0.01 C |
| 2009 | 10.0 C | +0.09 C |
| 2010 | 9.9 C | -0.01 C |
| 2011 | 9.4 C | -0.53 C |
| 2012 | 11.5 C | +1.56 C |
| 2013 | 9.2 C | -0.74 C |
| 2014 | 11.4 C | +1.55 C |
| 2015 | 11.3 C | +1.39 C |
| 2016 | 11.0 C | +1.13 C |
| 2017 | 11.6 C | +1.66 C |
| 2018 | 11.3 C | +1.39 C |
| 2019 | 10.0 C | +0.11 C |
| 2020 | 10.5 C | +0.61 C |
| 2021 | 11.1 C | +1.23 C |
| 2022 | 10.5 C | +0.56 C |
| 2023 | 10.1 C | +0.20 C |
| 2024 | 11.6 C | +1.70 C |
| 2025 | 11.7 C | +1.83 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1901 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 83 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1901 to 2025 | 83 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1901 to 2025 | 83 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1901 to 2025 | 83 | 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
1900 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.2 C (108.0 F) | 2023 | 38.9 C (102.0 F) | 104 |
| Coldest night (TNn) | -38.3 C (-36.9 F) | 1990 | -25.6 C (-14.1 F) | 104 |
| Wettest day (Rx1day) | 80.3 mm (3.2 in) | 1969 | 25.4 mm (1.0 in) | 106 |
| Wettest five days (Rx5day) | 83.4 mm (3.3 in) | 1969 | 32.1 mm (1.3 in) | 101 |
| Longest dry spell (CDD) | 103 days | 1972 | 39 days | 106 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1900 | 12.2 C (54.0 F) |
| 1901 | 37.2 C (99.0 F) |
| 1902 | 34.4 C (93.9 F) |
| 1903 | 34.4 C (93.9 F) |
| 1904 | 33.3 C (91.9 F) |
| 1905 | 36.7 C (98.1 F) |
| 1906 | 37.8 C (100.0 F) |
| 1907 | 37.8 C (100.0 F) |
| 1908 | n/a |
| 1910 | 37.2 C (99.0 F) |
| 1911 | 37.8 C (100.0 F) |
| 1912 | 38.9 C (102.0 F) |
| 1913 | 36.7 C (98.1 F) |
| 1914 | 38.3 C (100.9 F) |
| 1915 | 36.7 C (98.1 F) |
| 1916 | 37.2 C (99.0 F) |
| 1917 | 38.9 C (102.0 F) |
| 1918 | 41.1 C (106.0 F) |
| 1919 | 40.0 C (104.0 F) |
| 1920 | 40.0 C (104.0 F) |
| 1921 | 38.9 C (102.0 F) |
| 1922 | 40.0 C (104.0 F) |
| 1923 | 38.9 C (102.0 F) |
| 1924 | 38.9 C (102.0 F) |
| 1925 | 41.1 C (106.0 F) |
| 1926 | 38.9 C (102.0 F) |
| 1927 | 38.9 C (102.0 F) |
| 1928 | 37.8 C (100.0 F) |
| 1929 | 32.8 C (91.0 F) |
| 1941 | n/a |
| 1951 | 38.9 C (102.0 F) |
| 1952 | 38.3 C (100.9 F) |
| 1953 | 39.4 C (102.9 F) |
| 1954 | 40.0 C (104.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 37.8 C (100.0 F) |
| 1957 | 38.3 C (100.9 F) |
| 1958 | 36.7 C (98.1 F) |
| 1959 | 36.1 C (97.0 F) |
| 1960 | 40.6 C (105.1 F) |
| 1961 | 40.0 C (104.0 F) |
| 1962 | 40.6 C (105.1 F) |
| 1963 | 37.2 C (99.0 F) |
| 1964 | 37.2 C (99.0 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 37.2 C (99.0 F) |
| 1967 | 37.8 C (100.0 F) |
| 1968 | 37.8 C (100.0 F) |
| 1969 | 36.7 C (98.1 F) |
| 1970 | 38.3 C (100.9 F) |
| 1971 | 38.9 C (102.0 F) |
| 1972 | 38.3 C (100.9 F) |
| 1973 | 40.6 C (105.1 F) |
| 1974 | 38.9 C (102.0 F) |
| 1975 | 37.8 C (100.0 F) |
| 1976 | 39.4 C (102.9 F) |
| 1977 | 37.2 C (99.0 F) |
| 1978 | 38.9 C (102.0 F) |
| 1979 | 39.4 C (102.9 F) |
| 1980 | 38.3 C (100.9 F) |
| 1981 | 39.4 C (102.9 F) |
| 1982 | 39.4 C (102.9 F) |
| 1983 | 37.8 C (100.0 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 38.9 C (102.0 F) |
| 1986 | 38.3 C (100.9 F) |
| 1987 | 37.8 C (100.0 F) |
| 1988 | 38.9 C (102.0 F) |
| 1989 | 40.0 C (104.0 F) |
| 1990 | 39.4 C (102.9 F) |
| 1991 | 38.9 C (102.0 F) |
| 1992 | 38.3 C (100.9 F) |
| 1993 | 36.7 C (98.1 F) |
| 1994 | 38.9 C (102.0 F) |
| 1995 | 38.3 C (100.9 F) |
| 1996 | 40.0 C (104.0 F) |
| 1997 | 37.8 C (100.0 F) |
| 1998 | 38.3 C (100.9 F) |
| 1999 | 36.1 C (97.0 F) |
| 2000 | 38.3 C (100.9 F) |
| 2001 | 38.3 C (100.9 F) |
| 2002 | 38.9 C (102.0 F) |
| 2003 | 39.4 C (102.9 F) |
| 2004 | 37.2 C (99.0 F) |
| 2005 | 38.9 C (102.0 F) |
| 2006 | 39.4 C (102.9 F) |
| 2007 | 38.9 C (102.0 F) |
| 2008 | 38.9 C (102.0 F) |
| 2009 | 38.9 C (102.0 F) |
| 2010 | 37.2 C (99.0 F) |
| 2011 | 38.9 C (102.0 F) |
| 2012 | 40.6 C (105.1 F) |
| 2013 | 40.0 C (104.0 F) |
| 2014 | 40.0 C (104.0 F) |
| 2015 | 40.6 C (105.1 F) |
| 2016 | 40.0 C (104.0 F) |
| 2017 | 40.6 C (105.1 F) |
| 2018 | 40.6 C (105.1 F) |
| 2019 | 39.4 C (102.9 F) |
| 2020 | 40.6 C (105.1 F) |
| 2021 | 40.0 C (104.0 F) |
| 2022 | 41.7 C (107.1 F) |
| 2023 | 42.2 C (108.0 F) |
| 2024 | 42.2 C (108.0 F) |
| 2025 | 40.0 C (104.0 F) |
| 2026 | 41.7 C (107.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1900 | -20.0 C (-4.0 F) |
| 1901 | -23.9 C (-11.0 F) |
| 1902 | -31.7 C (-25.1 F) |
| 1903 | -31.1 C (-24.0 F) |
| 1904 | -25.6 C (-14.1 F) |
| 1905 | -32.2 C (-26.0 F) |
| 1906 | -21.7 C (-7.1 F) |
| 1907 | -21.1 C (-6.0 F) |
| 1908 | n/a |
| 1910 | -23.3 C (-9.9 F) |
| 1911 | -30.6 C (-23.1 F) |
| 1912 | -36.1 C (-33.0 F) |
| 1913 | -27.2 C (-17.0 F) |
| 1914 | -22.8 C (-9.0 F) |
| 1915 | -28.3 C (-18.9 F) |
| 1916 | -35.6 C (-32.1 F) |
| 1917 | -29.4 C (-20.9 F) |
| 1918 | -23.3 C (-9.9 F) |
| 1919 | -31.1 C (-24.0 F) |
| 1920 | -27.8 C (-18.0 F) |
| 1921 | -20.6 C (-5.1 F) |
| 1922 | -35.6 C (-32.1 F) |
| 1923 | -27.2 C (-17.0 F) |
| 1924 | -36.1 C (-33.0 F) |
| 1925 | -26.7 C (-16.1 F) |
| 1926 | -22.2 C (-8.0 F) |
| 1927 | -26.1 C (-15.0 F) |
| 1928 | -22.8 C (-9.0 F) |
| 1929 | -31.1 C (-24.0 F) |
| 1941 | n/a |
| 1951 | -26.1 C (-15.0 F) |
| 1952 | -30.6 C (-23.1 F) |
| 1953 | -20.0 C (-4.0 F) |
| 1954 | -21.1 C (-6.0 F) |
| 1955 | -29.4 C (-20.9 F) |
| 1956 | -21.7 C (-7.1 F) |
| 1957 | -27.2 C (-17.0 F) |
| 1958 | -23.3 C (-9.9 F) |
| 1959 | -21.1 C (-6.0 F) |
| 1960 | -30.0 C (-22.0 F) |
| 1961 | -23.3 C (-9.9 F) |
| 1962 | -33.3 C (-27.9 F) |
| 1963 | -30.0 C (-22.0 F) |
| 1964 | -23.9 C (-11.0 F) |
| 1965 | -23.3 C (-9.9 F) |
| 1966 | -25.0 C (-13.0 F) |
| 1967 | -30.0 C (-22.0 F) |
| 1968 | -28.9 C (-20.0 F) |
| 1969 | -20.6 C (-5.1 F) |
| 1970 | -23.3 C (-9.9 F) |
| 1971 | -27.8 C (-18.0 F) |
| 1972 | -22.2 C (-8.0 F) |
| 1973 | -32.2 C (-26.0 F) |
| 1974 | -27.8 C (-18.0 F) |
| 1975 | -22.8 C (-9.0 F) |
| 1976 | -25.0 C (-13.0 F) |
| 1977 | -22.8 C (-9.0 F) |
| 1978 | -25.0 C (-13.0 F) |
| 1979 | -33.9 C (-29.0 F) |
| 1980 | -16.7 C (1.9 F) |
| 1981 | -21.1 C (-6.0 F) |
| 1982 | -28.3 C (-18.9 F) |
| 1983 | -20.6 C (-5.1 F) |
| 1984 | -28.9 C (-20.0 F) |
| 1985 | -28.3 C (-18.9 F) |
| 1986 | -17.2 C (1.0 F) |
| 1987 | -27.8 C (-18.0 F) |
| 1988 | -30.6 C (-23.1 F) |
| 1989 | -33.3 C (-27.9 F) |
| 1990 | -38.3 C (-36.9 F) |
| 1991 | -25.6 C (-14.1 F) |
| 1992 | -27.2 C (-17.0 F) |
| 1993 | -28.9 C (-20.0 F) |
| 1994 | -21.7 C (-7.1 F) |
| 1995 | -21.1 C (-6.0 F) |
| 1996 | -27.2 C (-17.0 F) |
| 1997 | -26.7 C (-16.1 F) |
| 1998 | -36.7 C (-34.1 F) |
| 1999 | -17.8 C (0.0 F) |
| 2000 | -19.4 C (-2.9 F) |
| 2001 | -25.0 C (-13.0 F) |
| 2002 | -19.4 C (-2.9 F) |
| 2003 | -27.2 C (-17.0 F) |
| 2004 | -25.6 C (-14.1 F) |
| 2005 | -20.6 C (-5.1 F) |
| 2006 | -26.7 C (-16.1 F) |
| 2007 | -30.6 C (-23.1 F) |
| 2008 | -23.3 C (-9.9 F) |
| 2009 | -28.9 C (-20.0 F) |
| 2010 | -28.3 C (-18.9 F) |
| 2011 | -28.3 C (-18.9 F) |
| 2012 | -24.4 C (-11.9 F) |
| 2013 | -34.4 C (-29.9 F) |
| 2014 | -18.9 C (-2.0 F) |
| 2015 | -22.2 C (-8.0 F) |
| 2016 | -27.8 C (-18.0 F) |
| 2017 | -28.9 C (-20.0 F) |
| 2018 | -23.3 C (-9.9 F) |
| 2019 | -23.3 C (-9.9 F) |
| 2020 | -25.6 C (-14.1 F) |
| 2021 | -19.4 C (-2.9 F) |
| 2022 | -20.0 C (-4.0 F) |
| 2023 | -22.8 C (-9.0 F) |
| 2024 | -22.8 C (-9.0 F) |
| 2025 | -21.1 C (-6.0 F) |
| 2026 | -16.7 C (1.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1900 | 14.2 mm (0.6 in) |
| 1901 | 23.9 mm (0.9 in) |
| 1902 | 18.8 mm (0.7 in) |
| 1903 | 37.8 mm (1.5 in) |
| 1904 | 13.5 mm (0.5 in) |
| 1905 | 31.8 mm (1.3 in) |
| 1906 | 32.3 mm (1.3 in) |
| 1907 | 22.9 mm (0.9 in) |
| 1908 | 20.3 mm (0.8 in) |
| 1910 | 21.1 mm (0.8 in) |
| 1911 | 28.7 mm (1.1 in) |
| 1912 | 22.4 mm (0.9 in) |
| 1913 | 20.6 mm (0.8 in) |
| 1914 | 32.0 mm (1.3 in) |
| 1915 | 40.6 mm (1.6 in) |
| 1916 | 40.6 mm (1.6 in) |
| 1917 | 25.4 mm (1.0 in) |
| 1918 | 25.4 mm (1.0 in) |
| 1919 | 15.0 mm (0.6 in) |
| 1920 | 25.4 mm (1.0 in) |
| 1921 | 45.7 mm (1.8 in) |
| 1922 | 24.6 mm (1.0 in) |
| 1923 | 26.9 mm (1.1 in) |
| 1924 | 30.7 mm (1.2 in) |
| 1925 | 47.5 mm (1.9 in) |
| 1926 | 14.0 mm (0.6 in) |
| 1927 | 24.4 mm (1.0 in) |
| 1928 | 25.9 mm (1.0 in) |
| 1929 | 12.7 mm (0.5 in) |
| 1941 | 20.3 mm (0.8 in) |
| 1951 | 25.4 mm (1.0 in) |
| 1952 | 26.7 mm (1.1 in) |
| 1953 | 26.2 mm (1.0 in) |
| 1954 | 25.9 mm (1.0 in) |
| 1955 | 14.0 mm (0.6 in) |
| 1956 | 48.5 mm (1.9 in) |
| 1957 | 19.3 mm (0.8 in) |
| 1958 | 27.4 mm (1.1 in) |
| 1959 | 44.7 mm (1.8 in) |
| 1960 | 33.0 mm (1.3 in) |
| 1961 | 21.1 mm (0.8 in) |
| 1962 | 19.8 mm (0.8 in) |
| 1963 | 28.7 mm (1.1 in) |
| 1964 | 26.4 mm (1.0 in) |
| 1965 | 24.1 mm (0.9 in) |
| 1966 | 31.8 mm (1.3 in) |
| 1967 | 26.4 mm (1.0 in) |
| 1968 | 24.9 mm (1.0 in) |
| 1969 | 80.3 mm (3.2 in) |
| 1970 | 37.3 mm (1.5 in) |
| 1971 | 15.7 mm (0.6 in) |
| 1972 | 25.1 mm (1.0 in) |
| 1973 | 27.9 mm (1.1 in) |
| 1974 | 13.7 mm (0.5 in) |
| 1975 | 48.3 mm (1.9 in) |
| 1976 | 29.0 mm (1.1 in) |
| 1977 | 19.6 mm (0.8 in) |
| 1978 | 27.7 mm (1.1 in) |
| 1979 | 20.3 mm (0.8 in) |
| 1980 | 24.9 mm (1.0 in) |
| 1981 | 18.8 mm (0.7 in) |
| 1982 | 31.2 mm (1.2 in) |
| 1983 | 24.4 mm (1.0 in) |
| 1984 | 29.5 mm (1.2 in) |
| 1985 | 30.5 mm (1.2 in) |
| 1986 | 23.4 mm (0.9 in) |
| 1987 | 44.5 mm (1.8 in) |
| 1988 | 30.5 mm (1.2 in) |
| 1989 | 11.4 mm (0.4 in) |
| 1990 | 38.4 mm (1.5 in) |
| 1991 | 26.7 mm (1.1 in) |
| 1992 | 19.3 mm (0.8 in) |
| 1993 | 18.0 mm (0.7 in) |
| 1994 | 26.7 mm (1.1 in) |
| 1995 | 14.5 mm (0.6 in) |
| 1996 | 26.4 mm (1.0 in) |
| 1997 | 27.2 mm (1.1 in) |
| 1998 | 47.5 mm (1.9 in) |
| 1999 | 12.2 mm (0.5 in) |
| 2000 | 20.3 mm (0.8 in) |
| 2001 | 20.3 mm (0.8 in) |
| 2002 | 25.4 mm (1.0 in) |
| 2003 | 19.3 mm (0.8 in) |
| 2004 | 25.4 mm (1.0 in) |
| 2005 | 12.4 mm (0.5 in) |
| 2006 | 39.9 mm (1.6 in) |
| 2007 | 14.7 mm (0.6 in) |
| 2008 | 26.7 mm (1.1 in) |
| 2009 | 16.8 mm (0.7 in) |
| 2010 | 34.8 mm (1.4 in) |
| 2011 | 31.8 mm (1.3 in) |
| 2012 | 26.2 mm (1.0 in) |
| 2013 | 25.4 mm (1.0 in) |
| 2014 | 38.4 mm (1.5 in) |
| 2015 | 20.3 mm (0.8 in) |
| 2016 | 16.3 mm (0.6 in) |
| 2017 | 23.9 mm (0.9 in) |
| 2018 | 25.7 mm (1.0 in) |
| 2019 | 23.1 mm (0.9 in) |
| 2020 | 19.1 mm (0.8 in) |
| 2021 | 54.4 mm (2.1 in) |
| 2022 | 29.2 mm (1.1 in) |
| 2023 | 18.3 mm (0.7 in) |
| 2024 | 35.1 mm (1.4 in) |
| 2025 | 31.8 mm (1.3 in) |
| 2026 | 18.3 mm (0.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1900 | 17.3 mm (0.7 in) |
| 1901 | 24.2 mm (1.0 in) |
| 1902 | 30.5 mm (1.2 in) |
| 1903 | 42.7 mm (1.7 in) |
| 1904 | 21.9 mm (0.9 in) |
| 1905 | 44.0 mm (1.7 in) |
| 1906 | 38.1 mm (1.5 in) |
| 1907 | 34.3 mm (1.4 in) |
| 1908 | 54.6 mm (2.1 in) |
| 1910 | 40.9 mm (1.6 in) |
| 1911 | n/a |
| 1912 | 10.2 mm (0.4 in) |
| 1913 | 4.6 mm (0.18 in) |
| 1914 | 26.2 mm (1.0 in) |
| 1915 | n/a |
| 1916 | 48.2 mm (1.9 in) |
| 1917 | 29.2 mm (1.1 in) |
| 1918 | 12.7 mm (0.5 in) |
| 1919 | n/a |
| 1920 | 17.8 mm (0.7 in) |
| 1921 | 8.9 mm (0.35 in) |
| 1922 | 38.1 mm (1.5 in) |
| 1923 | 38.6 mm (1.5 in) |
| 1924 | n/a |
| 1925 | 14.2 mm (0.6 in) |
| 1926 | 21.2 mm (0.8 in) |
| 1927 | 25.4 mm (1.0 in) |
| 1928 | 26.0 mm (1.0 in) |
| 1929 | n/a |
| 1941 | 31.8 mm (1.3 in) |
| 1951 | 30.2 mm (1.2 in) |
| 1952 | 33.7 mm (1.3 in) |
| 1953 | 42.5 mm (1.7 in) |
| 1954 | 32.0 mm (1.3 in) |
| 1955 | 18.3 mm (0.7 in) |
| 1956 | 57.4 mm (2.3 in) |
| 1957 | 35.1 mm (1.4 in) |
| 1958 | 32.2 mm (1.3 in) |
| 1959 | 47.2 mm (1.9 in) |
| 1960 | 34.3 mm (1.4 in) |
| 1961 | 35.3 mm (1.4 in) |
| 1962 | 23.2 mm (0.9 in) |
| 1963 | 28.7 mm (1.1 in) |
| 1964 | 54.4 mm (2.1 in) |
| 1965 | 52.3 mm (2.1 in) |
| 1966 | 36.1 mm (1.4 in) |
| 1967 | 46.7 mm (1.8 in) |
| 1968 | 34.3 mm (1.4 in) |
| 1969 | 83.4 mm (3.3 in) |
| 1970 | 37.6 mm (1.5 in) |
| 1971 | 22.8 mm (0.9 in) |
| 1972 | 26.6 mm (1.0 in) |
| 1973 | 32.0 mm (1.3 in) |
| 1974 | 18.5 mm (0.7 in) |
| 1975 | 52.1 mm (2.1 in) |
| 1976 | 38.7 mm (1.5 in) |
| 1977 | 31.3 mm (1.2 in) |
| 1978 | 40.4 mm (1.6 in) |
| 1979 | 46.2 mm (1.8 in) |
| 1980 | 53.3 mm (2.1 in) |
| 1981 | 31.2 mm (1.2 in) |
| 1982 | 67.5 mm (2.7 in) |
| 1983 | 39.4 mm (1.6 in) |
| 1984 | 33.3 mm (1.3 in) |
| 1985 | 39.1 mm (1.5 in) |
| 1986 | 30.0 mm (1.2 in) |
| 1987 | 56.0 mm (2.2 in) |
| 1988 | 30.5 mm (1.2 in) |
| 1989 | 17.3 mm (0.7 in) |
| 1990 | 42.5 mm (1.7 in) |
| 1991 | 32.1 mm (1.3 in) |
| 1992 | 29.4 mm (1.2 in) |
| 1993 | 29.4 mm (1.2 in) |
| 1994 | 45.7 mm (1.8 in) |
| 1995 | 27.7 mm (1.1 in) |
| 1996 | 27.4 mm (1.1 in) |
| 1997 | 38.1 mm (1.5 in) |
| 1998 | 64.2 mm (2.5 in) |
| 1999 | 20.6 mm (0.8 in) |
| 2000 | 42.4 mm (1.7 in) |
| 2001 | 27.9 mm (1.1 in) |
| 2002 | 35.7 mm (1.4 in) |
| 2003 | 19.3 mm (0.8 in) |
| 2004 | 50.8 mm (2.0 in) |
| 2005 | 22.4 mm (0.9 in) |
| 2006 | 50.6 mm (2.0 in) |
| 2007 | 17.2 mm (0.7 in) |
| 2008 | 26.7 mm (1.1 in) |
| 2009 | 19.8 mm (0.8 in) |
| 2010 | 56.1 mm (2.2 in) |
| 2011 | 57.4 mm (2.3 in) |
| 2012 | 26.2 mm (1.0 in) |
| 2013 | 30.5 mm (1.2 in) |
| 2014 | 58.1 mm (2.3 in) |
| 2015 | 26.4 mm (1.0 in) |
| 2016 | 29.2 mm (1.1 in) |
| 2017 | 46.3 mm (1.8 in) |
| 2018 | 64.5 mm (2.5 in) |
| 2019 | 29.0 mm (1.1 in) |
| 2020 | 20.6 mm (0.8 in) |
| 2021 | 56.7 mm (2.2 in) |
| 2022 | 29.5 mm (1.2 in) |
| 2023 | 24.1 mm (0.9 in) |
| 2024 | 53.7 mm (2.1 in) |
| 2025 | 33.6 mm (1.3 in) |
| 2026 | 20.1 mm (0.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1900 | 42 days |
| 1901 | 46 days |
| 1902 | 43 days |
| 1903 | 38 days |
| 1904 | 51 days |
| 1905 | 51 days |
| 1906 | 37 days |
| 1907 | 18 days |
| 1908 | 33 days |
| 1910 | 28 days |
| 1911 | 1 day |
| 1912 | 22 days |
| 1913 | 17 days |
| 1914 | 24 days |
| 1915 | 1 day |
| 1916 | 55 days |
| 1917 | 53 days |
| 1918 | 22 days |
| 1919 | 2 days |
| 1920 | 11 days |
| 1921 | 27 days |
| 1922 | 16 days |
| 1923 | 24 days |
| 1924 | 2 days |
| 1925 | 2 days |
| 1926 | 25 days |
| 1927 | 25 days |
| 1928 | 30 days |
| 1929 | 1 day |
| 1941 | 30 days |
| 1951 | 37 days |
| 1952 | 54 days |
| 1953 | 58 days |
| 1954 | 30 days |
| 1955 | 34 days |
| 1956 | 66 days |
| 1957 | 50 days |
| 1958 | 71 days |
| 1959 | 36 days |
| 1960 | 86 days |
| 1961 | 57 days |
| 1962 | 45 days |
| 1963 | 41 days |
| 1964 | 52 days |
| 1965 | 46 days |
| 1966 | 39 days |
| 1967 | 32 days |
| 1968 | 40 days |
| 1969 | 39 days |
| 1970 | 36 days |
| 1971 | 40 days |
| 1972 | 103 days |
| 1973 | 34 days |
| 1974 | 95 days |
| 1975 | 25 days |
| 1976 | 70 days |
| 1977 | 40 days |
| 1978 | 87 days |
| 1979 | 68 days |
| 1980 | 42 days |
| 1981 | 34 days |
| 1982 | 25 days |
| 1983 | 49 days |
| 1984 | 34 days |
| 1985 | 56 days |
| 1986 | 48 days |
| 1987 | 34 days |
| 1988 | 39 days |
| 1989 | 45 days |
| 1990 | 33 days |
| 1991 | 35 days |
| 1992 | 37 days |
| 1993 | 35 days |
| 1994 | 59 days |
| 1995 | 57 days |
| 1996 | 47 days |
| 1997 | 46 days |
| 1998 | 27 days |
| 1999 | 38 days |
| 2000 | 39 days |
| 2001 | 76 days |
| 2002 | 79 days |
| 2003 | 38 days |
| 2004 | 38 days |
| 2005 | 41 days |
| 2006 | 41 days |
| 2007 | 61 days |
| 2008 | 31 days |
| 2009 | 62 days |
| 2010 | 43 days |
| 2011 | 49 days |
| 2012 | 81 days |
| 2013 | 38 days |
| 2014 | 30 days |
| 2015 | 44 days |
| 2016 | 33 days |
| 2017 | 49 days |
| 2018 | 61 days |
| 2019 | 41 days |
| 2020 | 76 days |
| 2021 | 43 days |
| 2022 | 57 days |
| 2023 | 39 days |
| 2024 | 34 days |
| 2025 | 89 days |
| 2026 | 39 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
83 years with a frostAcross 83 years with a frost, the median last spring frost at Black Rock falls on 29 May and the median first autumn frost on 21 September, which leaves a median of 112 days between them.
In 1996 to 2025 the median growing season was 128 days. That is 14 days more than in 1901 to 1971.
Fitted over all years, the growing season changes by +2.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1901 to 1971) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 29 May | 26 May | 24 May | 2 days earlier | -0.6 days per decade |
| First autumn frost | 21 September | 16 September | 24 September | 8 days later | +1.5 days per decade |
| Growing days | 112 days | 114 days | 128 days | 14 days more | +2.1 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
77 years, 1901 to 2025A day with at least 25.0 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 63.5 mm (2.5 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 25.0 mm (1.0 in) | |
| 5 years | 34.2 mm (1.3 in) | |
| 10 years | 40.7 mm (1.6 in) | |
| 25 years | 49.4 mm (1.9 in) | |
| 50 years | 56.3 mm (2.2 in) | |
| 100 years | 63.5 mm (2.5 in) | Longer than the 77 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, 77 years of values from 1901 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: 80.3 mm (3.2 in) in 1969; 54.4 mm (2.1 in) in 2021; 48.5 mm (1.9 in) in 1956.
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, Black Rock had a mean temperature of 10.8 C (51.4 F) and 225.1 mm (8.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Ontario Ksrv (United States, 681 km away), Tacony 13 SE (United States, 775 km away) and Vale (United States, 687 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Ontario Ksrv | United States | 681 km (423 mi) | 10.8 C (51.5 F) | 244.5 mm (9.6 in) | 0.64 |
| Tacony 13 SE | United States | 775 km (482 mi) | 10.9 C (51.6 F) | 263.3 mm (10.4 in) | 0.67 |
| Vale | United States | 687 km (427 mi) | 10.7 C (51.2 F) | 249.3 mm (9.8 in) | 0.72 |
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 (2026-10-13).