Blackleaf Weather Records (USC00240877)
Record envelope, standing records and threshold days for Blackleaf (USC00240877), Montana, United States, with 106 years of record.
Key Facts for Blackleaf
- Blackleaf (USC00240877) is a weather station in Montana, United States at 48.01 latitude and -112.44 longitude, 1,291 m (4,235 ft) above sea level.
- The station reports from 1905 to 2010, 106 years of record.
- 1,464 records set at Blackleaf still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Blackleaf set a daily record high maximum temperature of 28.9 C (84.0 F) on 2 October 2010.
About the Station
- Location: Montana, United States, 48.01 latitude, -112.44 longitude.
- Elevation: 1,291 m (4,235 ft).
- Period of record: 1905 to 2010, 106 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 | 18.3 C (64.9 F) | -43.3 C (-45.9 F) | n/a | n/a |
| Feb | 21.1 C (70.0 F) | -43.9 C (-47.0 F) | n/a | n/a |
| Mar | 25.0 C (77.0 F) | -40.0 C (-40.0 F) | n/a | n/a |
| Apr | 28.9 C (84.0 F) | -23.9 C (-11.0 F) | n/a | n/a |
| May | 33.9 C (93.0 F) | -15.0 C (5.0 F) | n/a | n/a |
| Jun | 34.4 C (93.9 F) | -11.1 C (12.0 F) | n/a | n/a |
| Jul | 38.9 C (102.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Aug | 38.9 C (102.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Sep | 35.6 C (96.1 F) | -12.2 C (10.0 F) | n/a | n/a |
| Oct | 30.6 C (87.1 F) | -28.9 C (-20.0 F) | n/a | n/a |
| Nov | 27.8 C (82.0 F) | -36.7 C (-34.1 F) | n/a | n/a |
| Dec | 20.0 C (68.0 F) | -41.7 C (-43.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1907 | 6 |
| 1908 | 33 |
| 1909 | 53 |
| 1910 | 46 |
| 1911 | 31 |
| 1912 | 16 |
| 1913 | 23 |
| 1914 | 22 |
| 1915 | 9 |
| 1916 | 23 |
| 1917 | 50 |
| 1918 | 19 |
| 1919 | 30 |
| 1920 | 13 |
| 1921 | 3 |
| 1954 | 14 |
| 1955 | 21 |
| 1956 | 31 |
| 1957 | 17 |
| 1958 | 13 |
| 1959 | 16 |
| 1960 | 24 |
| 1961 | 14 |
| 1962 | 18 |
| 1963 | 16 |
| 1964 | 15 |
| 1965 | 12 |
| 1966 | 15 |
| 1967 | 38 |
| 1968 | 26 |
| 1969 | 29 |
| 1970 | 15 |
| 1971 | 23 |
| 1972 | 20 |
| 1973 | 26 |
| 1974 | 14 |
| 1975 | 25 |
| 1976 | 13 |
| 1977 | 18 |
| 1978 | 4 |
| 1979 | 12 |
| 1980 | 26 |
| 1981 | 17 |
| 1982 | 15 |
| 1983 | 25 |
| 1984 | 25 |
| 1985 | 40 |
| 1986 | 33 |
| 1987 | 34 |
| 1988 | 19 |
| 1989 | 12 |
| 1990 | 22 |
| 1991 | 19 |
| 1992 | 36 |
| 1993 | 20 |
| 1994 | 18 |
| 1995 | 13 |
| 1996 | 29 |
| 1997 | 12 |
| 1998 | 11 |
| 1999 | 22 |
| 2000 | 14 |
| 2001 | 9 |
| 2002 | 23 |
| 2003 | 27 |
| 2004 | 15 |
| 2005 | 27 |
| 2006 | 7 |
| 2007 | 12 |
| 2009 | 9 |
| 2010 | 7 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1964-06-08 | Record daily precipitation | Record daily precipitation 119.4 mm (4.7 in) |
| 1994-02-08 | Record low minimum temperature | Record low minimum temperature -43.9 C (-47.0 F) |
Wettest Day of Each Month
Jun: 119.4 mm (4.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 25.4 mm (1.0 in) | 23 January 2010 |
| Feb | 25.4 mm (1.0 in) | 1 February 1963 |
| Mar | 22.9 mm (0.9 in) | 13 March 1907 |
| Apr | 61.2 mm (2.4 in) | 26 April 1976 |
| May | 101.6 mm (4.0 in) | 27 May 2010 |
| Jun | 119.4 mm (4.7 in) | 8 June 1964 |
| Jul | 55.1 mm (2.2 in) | 13 July 1970 |
| Aug | 56.9 mm (2.2 in) | 25 August 1989 |
| Sep | 89.2 mm (3.5 in) | 4 September 1911 |
| Oct | 53.8 mm (2.1 in) | 4 October 1913 |
| Nov | 18.3 mm (0.7 in) | 26 November 1999 |
| Dec | 15.2 mm (0.6 in) | 18 December 1990 |
Period of Record Coverage
1907 to 2010| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1907 | 79 | 22% | No |
| 1908 | 361 | 99% | Yes |
| 1909 | 324 | 89% | No |
| 1910 | 350 | 96% | Yes |
| 1911 | 358 | 98% | Yes |
| 1912 | 364 | 99% | Yes |
| 1913 | 362 | 99% | Yes |
| 1914 | 363 | 99% | Yes |
| 1915 | 293 | 80% | No |
| 1916 | 208 | 57% | No |
| 1917 | 274 | 75% | No |
| 1918 | 294 | 81% | No |
| 1919 | 191 | 52% | No |
| 1920 | 176 | 48% | No |
| 1921 | 93 | 25% | No |
| 1954 | 202 | 55% | No |
| 1955 | 364 | 100% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 362 | 99% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 360 | 98% | Yes |
| 1961 | 350 | 96% | Yes |
| 1962 | 357 | 98% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 362 | 99% | Yes |
| 1965 | 272 | 75% | No |
| 1966 | 213 | 58% | No |
| 1967 | 352 | 96% | Yes |
| 1968 | 356 | 97% | Yes |
| 1969 | 341 | 93% | Yes |
| 1970 | 342 | 94% | Yes |
| 1971 | 326 | 89% | No |
| 1972 | 357 | 98% | Yes |
| 1973 | 343 | 94% | Yes |
| 1974 | 356 | 98% | Yes |
| 1975 | 363 | 99% | Yes |
| 1976 | 359 | 98% | Yes |
| 1977 | 333 | 91% | Yes |
| 1978 | 298 | 82% | No |
| 1979 | 325 | 89% | No |
| 1980 | 300 | 82% | No |
| 1981 | 346 | 95% | Yes |
| 1982 | 322 | 88% | No |
| 1983 | 348 | 95% | Yes |
| 1984 | 333 | 91% | Yes |
| 1985 | 334 | 92% | Yes |
| 1986 | 331 | 91% | Yes |
| 1987 | 350 | 96% | Yes |
| 1988 | 339 | 93% | Yes |
| 1989 | 260 | 71% | No |
| 1990 | 319 | 87% | No |
| 1991 | 334 | 92% | Yes |
| 1992 | 349 | 95% | Yes |
| 1993 | 343 | 94% | Yes |
| 1994 | 324 | 89% | No |
| 1995 | 344 | 94% | Yes |
| 1996 | 288 | 79% | No |
| 1997 | 317 | 87% | No |
| 1998 | 330 | 90% | Yes |
| 1999 | 306 | 84% | No |
| 2000 | 298 | 81% | No |
| 2001 | 252 | 69% | No |
| 2002 | 299 | 82% | No |
| 2003 | 320 | 88% | No |
| 2004 | 281 | 77% | No |
| 2005 | 261 | 72% | No |
| 2006 | 175 | 48% | No |
| 2007 | 101 | 28% | No |
| 2009 | 81 | 22% | No |
| 2010 | 187 | 51% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 2 October 2010 | Blackleaf, US | daily high max | 28.9 C (84.0 F) | 0.6 C (1.1 F) | 35 years | 20 of 100 (Routine) |
| 17 September 2010 | Blackleaf, US | daily low max | 4.4 C (39.9 F) | 0.6 C (1.1 F) | 21 years | 16 of 100 (Routine) |
| 30 June 2010 | Blackleaf, US | daily high min (Tie) | 12.2 C (54.0 F) | tie | 36 years | 5 of 100 (Routine) |
| 17 June 2010 | Blackleaf, US | daily low max (Tie) | 11.1 C (52.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 16 June 2010 | Blackleaf, US | daily low max (Tie) | 10.0 C (50.0 F) | tie | 16 years | 3 of 100 (Routine) |
| 15 June 2010 | Blackleaf, US | daily low min | -2.2 C (28.0 F) | 1.1 C (2.0 F) | 31 years | 22 of 100 (Routine) |
| 14 June 2010 | Blackleaf, US | daily low min | -2.8 C (27.0 F) | 0.6 C (1.1 F) | 40 years | 23 of 100 (Routine) |
| 27 May 2010 | Blackleaf, US | monthly rain | 101.6 mm (4.0 in) | 17.0 mm (0.7 in) | 57 years | 52 of 100 (Notable) |
| 6 May 2010 | Blackleaf, US | daily low max | 1.7 C (35.1 F) | 0.5 C (0.9 F) | 35 years | 20 of 100 (Routine) |
| 5 May 2010 | Blackleaf, US | daily low max | -0.6 C (30.9 F) | 5.0 C (9.0 F) | 49 years | 32 of 100 (Routine) |
| 29 April 2010 | Blackleaf, US | daily rain | 19.1 mm (0.8 in) | 6.9 mm (0.27 in) | 92 years | 20 of 100 (Routine) |
| 26 March 2010 | Blackleaf, US | daily high max | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 49 years | 25 of 100 (Routine) |
| 18 March 2010 | Blackleaf, US | daily high max (Tie) | 21.1 C (70.0 F) | tie | 100 years | 10 of 100 (Routine) |
| 23 January 2010 | Blackleaf, US | daily snowfall | 20.3 cm (8.0 in) | 12.7 cm (5.0 in) | 60 years | 54 of 100 (Notable) |
| 23 January 2010 | Blackleaf, US | monthly rain | 25.4 mm (1.0 in) | 1.0 mm (0.04 in) | 90 years | 50 of 100 (Notable) |
| 14 December 2009 | Blackleaf, US | daily low max | -20.0 C (-4.0 F) | 2.2 C (4.0 F) | 8 years | 14 of 100 (Routine) |
| 13 December 2009 | Blackleaf, US | daily low max | -24.4 C (-11.9 F) | 5.5 C (9.9 F) | 92 years | 43 of 100 (Notable) |
| 8 December 2009 | Blackleaf, US | daily low min | -38.9 C (-38.0 F) | 1.7 C (3.1 F) | 36 years | 22 of 100 (Routine) |
| 7 December 2009 | Blackleaf, US | daily low min | -37.2 C (-35.0 F) | 3.3 C (5.9 F) | 36 years | 24 of 100 (Routine) |
| 26 November 2009 | Blackleaf, US | daily high max (Tie) | 16.7 C (62.1 F) | tie | 52 years | 6 of 100 (Routine) |
Climate Trend
35 complete years, 1908 to 2003| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1908 | 5.4 C | +0.20 C |
| 1911 | 3.2 C | -1.93 C |
| 1912 | 4.0 C | -1.13 C |
| 1913 | 3.4 C | -1.74 C |
| 1914 | 4.5 C | -0.63 C |
| 1955 | 3.4 C | -1.79 C |
| 1956 | 5.1 C | -0.02 C |
| 1957 | 4.5 C | -0.66 C |
| 1958 | 5.9 C | +0.78 C |
| 1959 | 4.8 C | -0.32 C |
| 1960 | 5.1 C | -0.05 C |
| 1961 | 5.5 C | +0.34 C |
| 1962 | 5.1 C | -0.03 C |
| 1963 | 5.9 C | +0.71 C |
| 1964 | 4.7 C | -0.47 C |
| 1967 | 5.4 C | +0.26 C |
| 1968 | 4.6 C | -0.59 C |
| 1969 | 4.2 C | -0.97 C |
| 1970 | 5.0 C | -0.17 C |
| 1972 | 3.8 C | -1.34 C |
| 1973 | 5.8 C | +0.66 C |
| 1974 | 5.9 C | +0.76 C |
| 1975 | 3.9 C | -1.26 C |
| 1976 | 6.7 C | +1.50 C |
| 1983 | 5.6 C | +0.44 C |
| 1985 | 4.7 C | -0.50 C |
| 1986 | 7.0 C | +1.86 C |
| 1987 | 7.5 C | +2.31 C |
| 1988 | 7.1 C | +1.91 C |
| 1991 | 5.9 C | +0.70 C |
| 1992 | 6.0 C | +0.82 C |
| 1993 | 4.3 C | -0.91 C |
| 1995 | 4.6 C | -0.55 C |
| 1998 | 6.3 C | +1.13 C |
| 2003 | 5.9 C | +0.77 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1908 to 2003. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 35 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 0.3) per decade | 0.4 F (0.2 to 0.6) per decade | 1908 to 2003 | 35 | Rise |
| Mean daily maximum | 0.3 C (0.1 to 0.4) per decade | 0.5 F (0.2 to 0.8) per decade | 1908 to 2003 | 35 | Rise |
| Mean daily minimum | 0.14 C (0.04 to 0.25) per decade | 0.3 F (0.1 to 0.4) per decade | 1908 to 2003 | 35 | 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
1905 to 2010| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.9 C (102.0 F) | 1969 | 33.9 C (93.0 F) | 71 |
| Coldest night (TNn) | -43.9 C (-47.0 F) | 1994 | -35.6 C (-32.1 F) | 71 |
| Wettest day (Rx1day) | 119.4 mm (4.7 in) | 1964 | 33.2 mm (1.3 in) | 78 |
| Wettest five days (Rx5day) | 186.8 mm (7.4 in) | 1908 | 57.5 mm (2.3 in) | 78 |
| Longest dry spell (CDD) | 87 days | 1969 | 34 days | 78 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1905 | n/a |
| 1906 | n/a |
| 1907 | 25.6 C (78.1 F) |
| 1908 | 33.9 C (93.0 F) |
| 1909 | 34.4 C (93.9 F) |
| 1910 | 33.9 C (93.0 F) |
| 1911 | 29.4 C (84.9 F) |
| 1912 | 30.6 C (87.1 F) |
| 1913 | 31.1 C (88.0 F) |
| 1914 | 35.0 C (95.0 F) |
| 1915 | 31.7 C (89.1 F) |
| 1916 | 27.8 C (82.0 F) |
| 1917 | 33.3 C (91.9 F) |
| 1918 | 32.2 C (90.0 F) |
| 1919 | 36.1 C (97.0 F) |
| 1920 | 22.8 C (73.0 F) |
| 1921 | 21.1 C (70.0 F) |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | 33.3 C (91.9 F) |
| 1955 | 31.7 C (89.1 F) |
| 1956 | 32.2 C (90.0 F) |
| 1957 | 31.1 C (88.0 F) |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 34.4 C (93.9 F) |
| 1960 | 35.6 C (96.1 F) |
| 1961 | 37.8 C (100.0 F) |
| 1962 | 31.7 C (89.1 F) |
| 1963 | 32.8 C (91.0 F) |
| 1964 | 32.2 C (90.0 F) |
| 1965 | 32.2 C (90.0 F) |
| 1966 | 34.4 C (93.9 F) |
| 1967 | 35.6 C (96.1 F) |
| 1968 | 33.3 C (91.9 F) |
| 1969 | 38.9 C (102.0 F) |
| 1970 | 33.9 C (93.0 F) |
| 1971 | 33.9 C (93.0 F) |
| 1972 | 31.7 C (89.1 F) |
| 1973 | 37.2 C (99.0 F) |
| 1974 | 34.4 C (93.9 F) |
| 1975 | 33.9 C (93.0 F) |
| 1976 | 33.3 C (91.9 F) |
| 1977 | 32.2 C (90.0 F) |
| 1978 | 32.8 C (91.0 F) |
| 1979 | 33.3 C (91.9 F) |
| 1980 | 32.8 C (91.0 F) |
| 1981 | 35.6 C (96.1 F) |
| 1982 | 32.2 C (90.0 F) |
| 1983 | 38.3 C (100.9 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 36.1 C (97.0 F) |
| 1986 | 32.2 C (90.0 F) |
| 1987 | 32.8 C (91.0 F) |
| 1988 | 34.4 C (93.9 F) |
| 1989 | 33.3 C (91.9 F) |
| 1990 | 35.6 C (96.1 F) |
| 1991 | 35.0 C (95.0 F) |
| 1992 | 33.9 C (93.0 F) |
| 1993 | 32.2 C (90.0 F) |
| 1994 | 34.4 C (93.9 F) |
| 1995 | 31.7 C (89.1 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 30.0 C (86.0 F) |
| 1998 | 34.4 C (93.9 F) |
| 1999 | 35.0 C (95.0 F) |
| 2000 | 36.1 C (97.0 F) |
| 2001 | 36.1 C (97.0 F) |
| 2002 | 35.0 C (95.0 F) |
| 2003 | 36.7 C (98.1 F) |
| 2004 | 34.4 C (93.9 F) |
| 2005 | 34.4 C (93.9 F) |
| 2006 | 33.9 C (93.0 F) |
| 2007 | 38.9 C (102.0 F) |
| 2009 | 23.3 C (73.9 F) |
| 2010 | 29.4 C (84.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1905 | n/a |
| 1906 | n/a |
| 1907 | -12.2 C (10.0 F) |
| 1908 | -28.9 C (-20.0 F) |
| 1909 | -39.4 C (-38.9 F) |
| 1910 | -38.9 C (-38.0 F) |
| 1911 | -40.6 C (-41.1 F) |
| 1912 | -36.1 C (-33.0 F) |
| 1913 | -35.6 C (-32.1 F) |
| 1914 | -38.3 C (-36.9 F) |
| 1915 | -30.6 C (-23.1 F) |
| 1916 | -43.3 C (-45.9 F) |
| 1917 | -39.4 C (-38.9 F) |
| 1918 | -37.2 C (-35.0 F) |
| 1919 | -41.7 C (-43.1 F) |
| 1920 | -35.6 C (-32.1 F) |
| 1921 | -26.1 C (-15.0 F) |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | -25.6 C (-14.1 F) |
| 1955 | -36.7 C (-34.1 F) |
| 1956 | -37.8 C (-36.0 F) |
| 1957 | -37.2 C (-35.0 F) |
| 1958 | -25.6 C (-14.1 F) |
| 1959 | -37.2 C (-35.0 F) |
| 1960 | -33.9 C (-29.0 F) |
| 1961 | -33.9 C (-29.0 F) |
| 1962 | -31.7 C (-25.1 F) |
| 1963 | -35.6 C (-32.1 F) |
| 1964 | -37.2 C (-35.0 F) |
| 1965 | -31.1 C (-24.0 F) |
| 1966 | -25.6 C (-14.1 F) |
| 1967 | -30.6 C (-23.1 F) |
| 1968 | -40.0 C (-40.0 F) |
| 1969 | -37.2 C (-35.0 F) |
| 1970 | -31.7 C (-25.1 F) |
| 1971 | -40.0 C (-40.0 F) |
| 1972 | -41.1 C (-42.0 F) |
| 1973 | -28.9 C (-20.0 F) |
| 1974 | -33.9 C (-29.0 F) |
| 1975 | -31.7 C (-25.1 F) |
| 1976 | -31.1 C (-24.0 F) |
| 1977 | -35.0 C (-31.0 F) |
| 1978 | -33.3 C (-27.9 F) |
| 1979 | -36.7 C (-34.1 F) |
| 1980 | -33.3 C (-27.9 F) |
| 1981 | -37.2 C (-35.0 F) |
| 1982 | -34.4 C (-29.9 F) |
| 1983 | -40.6 C (-41.1 F) |
| 1984 | -31.1 C (-24.0 F) |
| 1985 | -35.0 C (-31.0 F) |
| 1986 | -36.7 C (-34.1 F) |
| 1987 | -26.7 C (-16.1 F) |
| 1988 | -35.6 C (-32.1 F) |
| 1989 | -37.8 C (-36.0 F) |
| 1990 | -37.8 C (-36.0 F) |
| 1991 | -33.3 C (-27.9 F) |
| 1992 | -35.6 C (-32.1 F) |
| 1993 | -32.8 C (-27.0 F) |
| 1994 | -43.9 C (-47.0 F) |
| 1995 | -37.2 C (-35.0 F) |
| 1996 | -38.9 C (-38.0 F) |
| 1997 | -35.6 C (-32.1 F) |
| 1998 | -37.8 C (-36.0 F) |
| 1999 | -27.2 C (-17.0 F) |
| 2000 | -32.8 C (-27.0 F) |
| 2001 | -30.6 C (-23.1 F) |
| 2002 | -40.0 C (-40.0 F) |
| 2003 | -32.2 C (-26.0 F) |
| 2004 | -37.2 C (-35.0 F) |
| 2005 | -37.8 C (-36.0 F) |
| 2006 | -37.2 C (-35.0 F) |
| 2007 | -27.8 C (-18.0 F) |
| 2009 | -38.9 C (-38.0 F) |
| 2010 | -29.4 C (-20.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1905 | 18.5 mm (0.7 in) |
| 1906 | 35.6 mm (1.4 in) |
| 1907 | 76.2 mm (3.0 in) |
| 1908 | 94.0 mm (3.7 in) |
| 1909 | 50.8 mm (2.0 in) |
| 1910 | 55.9 mm (2.2 in) |
| 1911 | 89.2 mm (3.5 in) |
| 1912 | 83.8 mm (3.3 in) |
| 1913 | 53.8 mm (2.1 in) |
| 1914 | 19.1 mm (0.8 in) |
| 1915 | 34.0 mm (1.3 in) |
| 1916 | 78.7 mm (3.1 in) |
| 1917 | 31.8 mm (1.3 in) |
| 1918 | 32.0 mm (1.3 in) |
| 1919 | 20.3 mm (0.8 in) |
| 1920 | 34.3 mm (1.4 in) |
| 1921 | 23.4 mm (0.9 in) |
| 1949 | 15.2 mm (0.6 in) |
| 1950 | 33.3 mm (1.3 in) |
| 1951 | 34.3 mm (1.4 in) |
| 1952 | 27.9 mm (1.1 in) |
| 1953 | 84.6 mm (3.3 in) |
| 1954 | 30.2 mm (1.2 in) |
| 1955 | 22.4 mm (0.9 in) |
| 1956 | 47.5 mm (1.9 in) |
| 1957 | 29.0 mm (1.1 in) |
| 1958 | 30.2 mm (1.2 in) |
| 1959 | 21.3 mm (0.8 in) |
| 1960 | 27.4 mm (1.1 in) |
| 1961 | 17.8 mm (0.7 in) |
| 1962 | 24.1 mm (0.9 in) |
| 1963 | 25.4 mm (1.0 in) |
| 1964 | 119.4 mm (4.7 in) |
| 1965 | 27.9 mm (1.1 in) |
| 1966 | 31.2 mm (1.2 in) |
| 1967 | 23.6 mm (0.9 in) |
| 1968 | 38.1 mm (1.5 in) |
| 1969 | 17.8 mm (0.7 in) |
| 1970 | 55.1 mm (2.2 in) |
| 1971 | 21.1 mm (0.8 in) |
| 1972 | 66.5 mm (2.6 in) |
| 1973 | 17.0 mm (0.7 in) |
| 1974 | 29.0 mm (1.1 in) |
| 1975 | 72.4 mm (2.9 in) |
| 1976 | 61.2 mm (2.4 in) |
| 1977 | 19.1 mm (0.8 in) |
| 1978 | 28.7 mm (1.1 in) |
| 1979 | 22.1 mm (0.9 in) |
| 1980 | 38.4 mm (1.5 in) |
| 1981 | 33.5 mm (1.3 in) |
| 1982 | 44.5 mm (1.8 in) |
| 1983 | 44.5 mm (1.8 in) |
| 1984 | 33.8 mm (1.3 in) |
| 1985 | 29.7 mm (1.2 in) |
| 1986 | 34.3 mm (1.4 in) |
| 1987 | 30.7 mm (1.2 in) |
| 1988 | 19.1 mm (0.8 in) |
| 1989 | 56.9 mm (2.2 in) |
| 1990 | 30.7 mm (1.2 in) |
| 1991 | 61.2 mm (2.4 in) |
| 1992 | 27.9 mm (1.1 in) |
| 1993 | 51.1 mm (2.0 in) |
| 1994 | 38.1 mm (1.5 in) |
| 1995 | 47.5 mm (1.9 in) |
| 1996 | 49.5 mm (1.9 in) |
| 1997 | 41.4 mm (1.6 in) |
| 1998 | 29.7 mm (1.2 in) |
| 1999 | 29.2 mm (1.1 in) |
| 2000 | 35.6 mm (1.4 in) |
| 2001 | 27.9 mm (1.1 in) |
| 2002 | 116.8 mm (4.6 in) |
| 2003 | 25.4 mm (1.0 in) |
| 2004 | 33.5 mm (1.3 in) |
| 2005 | 33.0 mm (1.3 in) |
| 2006 | 55.9 mm (2.2 in) |
| 2007 | 12.7 mm (0.5 in) |
| 2009 | 6.4 mm (0.25 in) |
| 2010 | 101.6 mm (4.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1905 | 21.1 mm (0.8 in) |
| 1906 | 66.0 mm (2.6 in) |
| 1907 | 111.8 mm (4.4 in) |
| 1908 | 186.8 mm (7.4 in) |
| 1909 | 118.1 mm (4.6 in) |
| 1910 | 68.6 mm (2.7 in) |
| 1911 | 161.7 mm (6.4 in) |
| 1912 | 125.2 mm (4.9 in) |
| 1913 | 75.4 mm (3.0 in) |
| 1914 | 37.3 mm (1.5 in) |
| 1915 | 66.7 mm (2.6 in) |
| 1916 | 174.1 mm (6.9 in) |
| 1917 | 71.3 mm (2.8 in) |
| 1918 | 35.8 mm (1.4 in) |
| 1919 | 32.6 mm (1.3 in) |
| 1920 | 46.5 mm (1.8 in) |
| 1921 | 12.2 mm (0.5 in) |
| 1949 | 21.2 mm (0.8 in) |
| 1950 | 45.8 mm (1.8 in) |
| 1951 | 48.2 mm (1.9 in) |
| 1952 | 36.1 mm (1.4 in) |
| 1953 | 137.0 mm (5.4 in) |
| 1954 | 41.3 mm (1.6 in) |
| 1955 | 67.1 mm (2.6 in) |
| 1956 | 57.0 mm (2.2 in) |
| 1957 | 48.3 mm (1.9 in) |
| 1958 | 71.1 mm (2.8 in) |
| 1959 | 30.5 mm (1.2 in) |
| 1960 | 45.2 mm (1.8 in) |
| 1961 | 36.3 mm (1.4 in) |
| 1962 | 32.3 mm (1.3 in) |
| 1963 | 31.8 mm (1.3 in) |
| 1964 | 169.8 mm (6.7 in) |
| 1965 | 63.4 mm (2.5 in) |
| 1966 | 78.7 mm (3.1 in) |
| 1967 | 48.0 mm (1.9 in) |
| 1968 | 41.9 mm (1.6 in) |
| 1969 | 70.6 mm (2.8 in) |
| 1970 | 89.5 mm (3.5 in) |
| 1971 | 34.1 mm (1.3 in) |
| 1972 | 114.5 mm (4.5 in) |
| 1973 | 17.5 mm (0.7 in) |
| 1974 | 33.0 mm (1.3 in) |
| 1975 | 105.0 mm (4.1 in) |
| 1976 | 91.5 mm (3.6 in) |
| 1977 | 31.1 mm (1.2 in) |
| 1978 | 48.3 mm (1.9 in) |
| 1979 | 36.6 mm (1.4 in) |
| 1980 | 73.9 mm (2.9 in) |
| 1981 | 65.0 mm (2.6 in) |
| 1982 | 62.5 mm (2.5 in) |
| 1983 | 67.1 mm (2.6 in) |
| 1984 | 33.8 mm (1.3 in) |
| 1985 | 53.3 mm (2.1 in) |
| 1986 | 57.9 mm (2.3 in) |
| 1987 | 58.2 mm (2.3 in) |
| 1988 | 25.5 mm (1.0 in) |
| 1989 | 159.3 mm (6.3 in) |
| 1990 | 35.6 mm (1.4 in) |
| 1991 | 84.6 mm (3.3 in) |
| 1992 | 41.9 mm (1.6 in) |
| 1993 | 104.5 mm (4.1 in) |
| 1994 | 72.0 mm (2.8 in) |
| 1995 | 91.5 mm (3.6 in) |
| 1996 | 64.7 mm (2.5 in) |
| 1997 | 67.7 mm (2.7 in) |
| 1998 | 67.3 mm (2.6 in) |
| 1999 | 38.1 mm (1.5 in) |
| 2000 | 63.5 mm (2.5 in) |
| 2001 | 40.6 mm (1.6 in) |
| 2002 | 116.8 mm (4.6 in) |
| 2003 | 44.5 mm (1.8 in) |
| 2004 | 33.5 mm (1.3 in) |
| 2005 | 28.0 mm (1.1 in) |
| 2006 | 17.8 mm (0.7 in) |
| 2007 | 12.7 mm (0.5 in) |
| 2009 | 10.1 mm (0.4 in) |
| 2010 | 120.7 mm (4.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1905 | 76 days |
| 1906 | 44 days |
| 1907 | 54 days |
| 1908 | 68 days |
| 1909 | 41 days |
| 1910 | 41 days |
| 1911 | 60 days |
| 1912 | 35 days |
| 1913 | 32 days |
| 1914 | 33 days |
| 1915 | 37 days |
| 1916 | 23 days |
| 1917 | 22 days |
| 1918 | 55 days |
| 1919 | 47 days |
| 1920 | 19 days |
| 1921 | 15 days |
| 1949 | 25 days |
| 1950 | 36 days |
| 1951 | 21 days |
| 1952 | 37 days |
| 1953 | 27 days |
| 1954 | 51 days |
| 1955 | 45 days |
| 1956 | 28 days |
| 1957 | 36 days |
| 1958 | 25 days |
| 1959 | 52 days |
| 1960 | 42 days |
| 1961 | 28 days |
| 1962 | 32 days |
| 1963 | 44 days |
| 1964 | 46 days |
| 1965 | 24 days |
| 1966 | 24 days |
| 1967 | 34 days |
| 1968 | 37 days |
| 1969 | 87 days |
| 1970 | 27 days |
| 1971 | 30 days |
| 1972 | 34 days |
| 1973 | 80 days |
| 1974 | 28 days |
| 1975 | 24 days |
| 1976 | 67 days |
| 1977 | 35 days |
| 1978 | 18 days |
| 1979 | 30 days |
| 1980 | 20 days |
| 1981 | 34 days |
| 1982 | 23 days |
| 1983 | 50 days |
| 1984 | 54 days |
| 1985 | 32 days |
| 1986 | 22 days |
| 1987 | 44 days |
| 1988 | 27 days |
| 1989 | 22 days |
| 1990 | 40 days |
| 1991 | 28 days |
| 1992 | 29 days |
| 1993 | 29 days |
| 1994 | 27 days |
| 1995 | 39 days |
| 1996 | 31 days |
| 1997 | 53 days |
| 1998 | 33 days |
| 1999 | 35 days |
| 2000 | 47 days |
| 2001 | 28 days |
| 2002 | 59 days |
| 2003 | 51 days |
| 2004 | 60 days |
| 2005 | 35 days |
| 2006 | 21 days |
| 2007 | 42 days |
| 2009 | 24 days |
| 2010 | 29 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
35 years with a frostAcross 35 years with a frost, the median last spring frost at Blackleaf falls on 7 June and the median first autumn frost on 31 August, which leaves a median of 82 days between them.
Fitted over all years, the growing season changes by +6.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1955 to 2003) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 7 June | n/a | 5 June | n/a | -0.8 days per decade |
| First autumn frost | 31 August | n/a | 2 September | n/a | +5.6 days per decade |
| Growing days | 82 days | n/a | 84 days | n/a | +6.4 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
52 years, 1906 to 2003A day with at least 34.2 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 154.3 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 | 34.2 mm (1.3 in) | |
| 5 years | 53.4 mm (2.1 in) | |
| 10 years | 70.2 mm (2.8 in) | |
| 25 years | 97.4 mm (3.8 in) | |
| 50 years | 123.0 mm (4.8 in) | |
| 100 years | 154.3 mm (6.1 in) | Longer than the 52 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, 52 years of values from 1906 to 2003.
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: 119.4 mm (4.7 in) in 1964; 116.8 mm (4.6 in) in 2002; 94.0 mm (3.7 in) in 1908.
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).