Mt Wilson Cbs Weather Records (USC00046006)
Record envelope, standing records and threshold days for Mt Wilson Cbs (USC00046006), California, United States, with 79 years of record.
Key Facts for Mt Wilson Cbs
- Mt Wilson Cbs (USC00046006) is a weather station in California, United States at 34.23 latitude and -118.07 longitude, 1,740 m (5,710 ft) above sea level.
- The station reports from 1948 to 2026, 79 years of record.
- 1,464 records set at Mt Wilson Cbs still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Mt Wilson Cbs set a daily record high minimum temperature of 23.9 C (75.0 F) on 27 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: California, United States, 34.23 latitude, -118.07 longitude.
- Elevation: 1,740 m (5,710 ft).
- Period of record: 1948 to 2026, 79 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
6 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 25.0 C (77.0 F) | -12.8 C (9.0 F) | 20.0 C (68.0 F) | -1.7 C (28.9 F) |
| Feb | 26.7 C (80.1 F) | -11.7 C (10.9 F) | 23.3 C (73.9 F) | -5.0 C (23.0 F) |
| Mar | 28.3 C (82.9 F) | -10.0 C (14.0 F) | 28.3 C (82.9 F) | 2.8 C (37.0 F) |
| Apr | 30.0 C (86.0 F) | -7.8 C (18.0 F) | 20.6 C (69.1 F) | -0.6 C (30.9 F) |
| May | 33.3 C (91.9 F) | -5.6 C (21.9 F) | 27.2 C (81.0 F) | 0.6 C (33.1 F) |
| Jun | 38.3 C (100.9 F) | -1.7 C (28.9 F) | 28.3 C (82.9 F) | 8.9 C (48.0 F) |
| Jul | 38.9 C (102.0 F) | 3.3 C (37.9 F) | 31.7 C (89.1 F) | 13.3 C (55.9 F) |
| Aug | 38.3 C (100.9 F) | 2.8 C (37.0 F) | 31.7 C (89.1 F) | 13.9 C (57.0 F) |
| Sep | 36.7 C (98.1 F) | 1.1 C (34.0 F) | n/a | n/a |
| Oct | 35.0 C (95.0 F) | -7.8 C (18.0 F) | n/a | n/a |
| Nov | 28.9 C (84.0 F) | -9.4 C (15.1 F) | n/a | n/a |
| Dec | 25.6 C (78.1 F) | -12.2 C (10.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1948 | 16 |
| 1949 | 73 |
| 1950 | 23 |
| 1951 | 27 |
| 1952 | 34 |
| 1953 | 17 |
| 1954 | 15 |
| 1955 | 13 |
| 1956 | 10 |
| 1957 | 18 |
| 1958 | 12 |
| 1959 | 10 |
| 1960 | 16 |
| 1961 | 23 |
| 1962 | 22 |
| 1963 | 32 |
| 1964 | 37 |
| 1965 | 27 |
| 1966 | 12 |
| 1967 | 22 |
| 1968 | 13 |
| 1969 | 14 |
| 1970 | 10 |
| 1971 | 34 |
| 1972 | 24 |
| 1973 | 10 |
| 1974 | 10 |
| 1975 | 34 |
| 1976 | 21 |
| 1977 | 34 |
| 1978 | 41 |
| 1979 | 15 |
| 1980 | 25 |
| 1981 | 8 |
| 1982 | 16 |
| 1983 | 5 |
| 1984 | 5 |
| 1985 | 32 |
| 1986 | 14 |
| 1987 | 20 |
| 1988 | 15 |
| 1989 | 35 |
| 1990 | 16 |
| 1991 | 17 |
| 1992 | 6 |
| 1993 | 11 |
| 1994 | 16 |
| 1995 | 19 |
| 1996 | 28 |
| 1997 | 12 |
| 1998 | 19 |
| 1999 | 16 |
| 2000 | 21 |
| 2001 | 21 |
| 2002 | 13 |
| 2003 | 27 |
| 2004 | 12 |
| 2005 | 12 |
| 2006 | 33 |
| 2007 | 27 |
| 2008 | 25 |
| 2009 | 24 |
| 2010 | 21 |
| 2011 | 19 |
| 2012 | 23 |
| 2013 | 16 |
| 2014 | 14 |
| 2015 | 19 |
| 2016 | 30 |
| 2024 | 12 |
| 2025 | 16 |
| 2026 | 25 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 2005-07-18 | Record high maximum temperature | Record high maximum temperature 37.8 C (100.0 F) |
| 2007-07-05 | Record high maximum temperature | Record high maximum temperature 38.9 C (102.0 F) |
Wettest Day of Each Month
Jan: 303.8 mm (12.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 303.8 mm (12.0 in) | 25 January 1969 |
| Feb | 248.7 mm (9.8 in) | 11 February 1973 |
| Mar | 225.0 mm (8.9 in) | 2 March 1983 |
| Apr | 105.4 mm (4.1 in) | 20 April 1988 |
| May | 89.4 mm (3.5 in) | 5 May 1998 |
| Jun | 45.2 mm (1.8 in) | 5 June 1993 |
| Jul | 65.5 mm (2.6 in) | 19 July 2015 |
| Aug | 47.0 mm (1.9 in) | 17 August 1977 |
| Sep | 137.2 mm (5.4 in) | 11 September 1976 |
| Oct | 135.4 mm (5.3 in) | 30 October 1992 |
| Nov | 187.2 mm (7.4 in) | 29 November 1970 |
| Dec | 173.2 mm (6.8 in) | 6 December 1966 |
Period of Record Coverage
1948 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1948 | 184 | 50% | No |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 360 | 99% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 357 | 98% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 336 | 92% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 361 | 99% | Yes |
| 1966 | 360 | 99% | Yes |
| 1967 | 359 | 98% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 354 | 97% | Yes |
| 1970 | 363 | 99% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 335 | 92% | Yes |
| 1974 | 340 | 93% | Yes |
| 1975 | 351 | 96% | Yes |
| 1976 | 359 | 98% | Yes |
| 1977 | 360 | 99% | Yes |
| 1978 | 358 | 98% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 365 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 330 | 90% | Yes |
| 1983 | 357 | 98% | Yes |
| 1984 | 363 | 99% | Yes |
| 1985 | 362 | 99% | Yes |
| 1986 | 150 | 41% | No |
| 1987 | 215 | 59% | No |
| 1988 | 325 | 89% | No |
| 1989 | 335 | 92% | Yes |
| 1990 | 327 | 90% | No |
| 1991 | 323 | 88% | No |
| 1992 | 327 | 89% | No |
| 1993 | 328 | 90% | No |
| 1994 | 328 | 90% | No |
| 1995 | 339 | 93% | Yes |
| 1996 | 341 | 93% | Yes |
| 1997 | 329 | 90% | Yes |
| 1998 | 316 | 87% | No |
| 1999 | 325 | 89% | No |
| 2000 | 306 | 84% | No |
| 2001 | 335 | 92% | Yes |
| 2002 | 329 | 90% | Yes |
| 2003 | 286 | 78% | No |
| 2004 | 328 | 90% | No |
| 2005 | 322 | 88% | No |
| 2006 | 344 | 94% | Yes |
| 2007 | 352 | 96% | Yes |
| 2008 | 361 | 99% | Yes |
| 2009 | 362 | 99% | Yes |
| 2010 | 329 | 90% | Yes |
| 2011 | 271 | 74% | No |
| 2012 | 364 | 99% | Yes |
| 2013 | 364 | 100% | Yes |
| 2014 | 363 | 99% | Yes |
| 2015 | 363 | 99% | Yes |
| 2016 | 347 | 95% | Yes |
| 2024 | 143 | 39% | No |
| 2025 | 290 | 79% | No |
| 2026 | 243 | 67% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 27 August 2026 | Mt Wilson Cbs, US | daily high min (Provisional) | 23.9 C (75.0 F) | 0.6 C (1.1 F) | 24 years | 15 of 100 (Routine) |
| 26 August 2026 | Mt Wilson Cbs, US | daily high min (Provisional) | 24.4 C (75.9 F) | 0.5 C (0.9 F) | 27 years | 16 of 100 (Routine) |
| 25 August 2026 | Mt Wilson Cbs, US | daily high min (Tie, Provisional) | 23.9 C (75.0 F) | tie | 16 years | 2 of 100 (Routine) |
| 21 August 2026 | Mt Wilson Cbs, US | daily high min (Tie, Provisional) | 22.8 C (73.0 F) | tie | 0 years | 1 of 100 (Routine) |
| 20 August 2026 | Mt Wilson Cbs, US | daily high min (Tie, Provisional) | 23.3 C (73.9 F) | tie | 76 years | 7 of 100 (Routine) |
| 13 August 2026 | Mt Wilson Cbs, US | daily low max (Tie) | 20.0 C (68.0 F) | tie | 47 years | 5 of 100 (Routine) |
| 9 August 2026 | Mt Wilson Cbs, US | daily high min | 23.9 C (75.0 F) | 0.6 C (1.1 F) | 41 years | 20 of 100 (Routine) |
| 1 August 2026 | Mt Wilson Cbs, US | daily high min | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 48 years | 22 of 100 (Routine) |
| 27 May 2026 | Mt Wilson Cbs, US | daily low max | 4.4 C (39.9 F) | 1.7 C (3.1 F) | 72 years | 30 of 100 (Routine) |
| 11 May 2026 | Mt Wilson Cbs, US | daily high min | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 65 years | 27 of 100 (Routine) |
| 10 May 2026 | Mt Wilson Cbs, US | daily high min | 19.4 C (66.9 F) | 1.6 C (2.9 F) | 24 years | 16 of 100 (Routine) |
| 14 April 2026 | Mt Wilson Cbs, US | daily snowfall | 2.5 cm (1.0 in) | 2.5 cm (1.0 in) | 76 years | 20 of 100 (Routine) |
| 30 March 2026 | Mt Wilson Cbs, US | daily high min (Tie) | 12.8 C (55.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 29 March 2026 | Mt Wilson Cbs, US | daily high min | 15.6 C (60.1 F) | 2.8 C (5.0 F) | 48 years | 26 of 100 (Routine) |
| 28 March 2026 | Mt Wilson Cbs, US | daily high min | 14.4 C (57.9 F) | 1.1 C (2.0 F) | 40 years | 21 of 100 (Routine) |
| 27 March 2026 | Mt Wilson Cbs, US | daily high min | 15.6 C (60.1 F) | 2.3 C (4.1 F) | 48 years | 25 of 100 (Routine) |
| 24 March 2026 | Mt Wilson Cbs, US | daily high min | 17.8 C (64.0 F) | 4.5 C (8.1 F) | 36 years | 25 of 100 (Routine) |
| 23 March 2026 | Mt Wilson Cbs, US | daily high min | 17.2 C (63.0 F) | 4.4 C (7.9 F) | 55 years | 31 of 100 (Routine) |
| 23 March 2026 | Mt Wilson Cbs, US | daily high max | 25.0 C (77.0 F) | 2.2 C (4.0 F) | 36 years | 20 of 100 (Routine) |
| 22 March 2026 | Mt Wilson Cbs, US | daily high max (Tie) | 22.8 C (73.0 F) | tie | 32 years | 4 of 100 (Routine) |
Climate Trend
52 complete years, 1949 to 2015| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1949 | 11.9 C | -1.70 C |
| 1950 | 13.9 C | +0.27 C |
| 1951 | 12.7 C | -0.98 C |
| 1952 | 12.0 C | -1.61 C |
| 1953 | 13.0 C | -0.69 C |
| 1954 | 14.0 C | +0.31 C |
| 1955 | 12.4 C | -1.23 C |
| 1956 | 13.3 C | -0.32 C |
| 1957 | 12.4 C | -1.29 C |
| 1958 | 13.6 C | -0.08 C |
| 1959 | 14.2 C | +0.59 C |
| 1961 | 13.3 C | -0.33 C |
| 1962 | 13.0 C | -0.69 C |
| 1963 | 12.2 C | -1.49 C |
| 1964 | 11.8 C | -1.88 C |
| 1965 | 11.9 C | -1.75 C |
| 1966 | 12.7 C | -0.92 C |
| 1967 | 12.7 C | -0.95 C |
| 1968 | 13.0 C | -0.66 C |
| 1969 | 12.7 C | -0.97 C |
| 1970 | 13.2 C | -0.44 C |
| 1971 | 12.6 C | -1.06 C |
| 1972 | 13.3 C | -0.30 C |
| 1975 | 12.8 C | -0.83 C |
| 1976 | 13.2 C | -0.49 C |
| 1977 | 14.0 C | +0.31 C |
| 1979 | 13.5 C | -0.15 C |
| 1980 | 13.8 C | +0.14 C |
| 1981 | 14.5 C | +0.83 C |
| 1983 | 12.7 C | -0.96 C |
| 1984 | 14.1 C | +0.47 C |
| 1985 | 13.9 C | +0.25 C |
| 1988 | 14.5 C | +0.81 C |
| 1989 | 14.6 C | +0.95 C |
| 1990 | 14.1 C | +0.42 C |
| 1991 | 13.7 C | +0.10 C |
| 1992 | 14.0 C | +0.39 C |
| 1993 | 14.0 C | +0.36 C |
| 1995 | 14.4 C | +0.77 C |
| 1996 | 15.2 C | +1.55 C |
| 1997 | 14.8 C | +1.18 C |
| 1998 | 12.7 C | -0.97 C |
| 1999 | 14.7 C | +1.01 C |
| 2001 | 14.5 C | +0.82 C |
| 2002 | 14.6 C | +0.94 C |
| 2007 | 14.9 C | +1.28 C |
| 2008 | 15.1 C | +1.46 C |
| 2009 | 14.5 C | +0.90 C |
| 2012 | 15.0 C | +1.39 C |
| 2013 | 14.9 C | +1.25 C |
| 2014 | 16.0 C | +2.34 C |
| 2015 | 15.2 C | +1.51 C |
The annual mean temperature here has risen by 0.4 C (0.3 to 0.5) per decade over 1949 to 2015. In Fahrenheit: 0.7 F (0.6 to 0.9) per decade. The slope is a straight line fitted to 52 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.4 C (0.3 to 0.5) per decade | 0.7 F (0.6 to 0.9) per decade | 1949 to 2015 | 52 | Rise |
| Mean daily maximum | 0.5 C (0.4 to 0.6) per decade | 1.0 F (0.8 to 1.2) per decade | 1949 to 2015 | 52 | Rise |
| Mean daily minimum | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.3 to 0.7) per decade | 1949 to 2015 | 52 | 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) | 2007 | 33.9 C (93.0 F) | 72 |
| Coldest night (TNn) | -12.8 C (9.0 F) | 1969 | -7.8 C (18.0 F) | 72 |
| Wettest day (Rx1day) | 303.8 mm (12.0 in) | 1969 | 111.5 mm (4.4 in) | 72 |
| Wettest five days (Rx5day) | 652.8 mm (25.7 in) | 1969 | 201.5 mm (7.9 in) | 72 |
| Longest dry spell (CDD) | 194 days | 1980 | 112 days | 72 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1948 | 33.9 C (93.0 F) |
| 1949 | 33.3 C (91.9 F) |
| 1950 | 36.7 C (98.1 F) |
| 1951 | 32.8 C (91.0 F) |
| 1952 | 30.6 C (87.1 F) |
| 1953 | 31.1 C (88.0 F) |
| 1954 | 34.4 C (93.9 F) |
| 1955 | 35.0 C (95.0 F) |
| 1956 | 33.3 C (91.9 F) |
| 1957 | 32.2 C (90.0 F) |
| 1958 | 33.3 C (91.9 F) |
| 1959 | 32.8 C (91.0 F) |
| 1960 | 36.7 C (98.1 F) |
| 1961 | 36.7 C (98.1 F) |
| 1962 | 33.9 C (93.0 F) |
| 1963 | 31.7 C (89.1 F) |
| 1964 | 33.3 C (91.9 F) |
| 1965 | 30.0 C (86.0 F) |
| 1966 | 32.2 C (90.0 F) |
| 1967 | 32.8 C (91.0 F) |
| 1968 | 31.1 C (88.0 F) |
| 1969 | 32.2 C (90.0 F) |
| 1970 | 32.2 C (90.0 F) |
| 1971 | 34.4 C (93.9 F) |
| 1972 | 37.2 C (99.0 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 31.1 C (88.0 F) |
| 1975 | 32.2 C (90.0 F) |
| 1976 | 33.3 C (91.9 F) |
| 1977 | 33.9 C (93.0 F) |
| 1978 | 33.3 C (91.9 F) |
| 1979 | 33.9 C (93.0 F) |
| 1980 | 34.4 C (93.9 F) |
| 1981 | 35.6 C (96.1 F) |
| 1982 | 35.6 C (96.1 F) |
| 1983 | 33.3 C (91.9 F) |
| 1984 | 33.3 C (91.9 F) |
| 1985 | 33.9 C (93.0 F) |
| 1986 | 27.8 C (82.0 F) |
| 1987 | 32.2 C (90.0 F) |
| 1988 | 34.4 C (93.9 F) |
| 1989 | 36.7 C (98.1 F) |
| 1990 | 33.3 C (91.9 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 34.4 C (93.9 F) |
| 1994 | 36.1 C (97.0 F) |
| 1995 | 36.7 C (98.1 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 35.6 C (96.1 F) |
| 1998 | 36.7 C (98.1 F) |
| 1999 | 33.3 C (91.9 F) |
| 2000 | 33.9 C (93.0 F) |
| 2001 | 34.4 C (93.9 F) |
| 2002 | 34.4 C (93.9 F) |
| 2003 | 36.1 C (97.0 F) |
| 2004 | 34.4 C (93.9 F) |
| 2005 | 37.8 C (100.0 F) |
| 2006 | 37.8 C (100.0 F) |
| 2007 | 38.9 C (102.0 F) |
| 2008 | 37.2 C (99.0 F) |
| 2009 | 35.6 C (96.1 F) |
| 2010 | 38.3 C (100.9 F) |
| 2011 | 33.9 C (93.0 F) |
| 2012 | 35.6 C (96.1 F) |
| 2013 | 38.3 C (100.9 F) |
| 2014 | 34.4 C (93.9 F) |
| 2015 | 33.9 C (93.0 F) |
| 2016 | 36.7 C (98.1 F) |
| 2024 | 36.1 C (97.0 F) |
| 2025 | 32.2 C (90.0 F) |
| 2026 | 31.7 C (89.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1948 | -7.8 C (18.0 F) |
| 1949 | -12.2 C (10.0 F) |
| 1950 | -10.0 C (14.0 F) |
| 1951 | -9.4 C (15.1 F) |
| 1952 | -9.4 C (15.1 F) |
| 1953 | -7.8 C (18.0 F) |
| 1954 | -5.6 C (21.9 F) |
| 1955 | -7.8 C (18.0 F) |
| 1956 | -8.9 C (16.0 F) |
| 1957 | -12.2 C (10.0 F) |
| 1958 | -8.9 C (16.0 F) |
| 1959 | -11.1 C (12.0 F) |
| 1960 | -9.4 C (15.1 F) |
| 1961 | -6.1 C (21.0 F) |
| 1962 | -11.7 C (10.9 F) |
| 1963 | -9.4 C (15.1 F) |
| 1964 | -8.3 C (17.1 F) |
| 1965 | -7.2 C (19.0 F) |
| 1966 | -10.0 C (14.0 F) |
| 1967 | -12.2 C (10.0 F) |
| 1968 | -10.6 C (12.9 F) |
| 1969 | -12.8 C (9.0 F) |
| 1970 | -6.7 C (19.9 F) |
| 1971 | -10.6 C (12.9 F) |
| 1972 | -11.1 C (12.0 F) |
| 1973 | -6.7 C (19.9 F) |
| 1974 | -8.3 C (17.1 F) |
| 1975 | -9.4 C (15.1 F) |
| 1976 | -10.0 C (14.0 F) |
| 1977 | -5.6 C (21.9 F) |
| 1978 | -10.6 C (12.9 F) |
| 1979 | -11.7 C (10.9 F) |
| 1980 | -5.6 C (21.9 F) |
| 1981 | -5.6 C (21.9 F) |
| 1982 | -7.8 C (18.0 F) |
| 1983 | -5.6 C (21.9 F) |
| 1984 | -5.6 C (21.9 F) |
| 1985 | -6.7 C (19.9 F) |
| 1986 | -5.6 C (21.9 F) |
| 1987 | -10.0 C (14.0 F) |
| 1988 | -7.8 C (18.0 F) |
| 1989 | -10.6 C (12.9 F) |
| 1990 | -12.2 C (10.0 F) |
| 1991 | -6.1 C (21.0 F) |
| 1992 | -6.1 C (21.0 F) |
| 1993 | -5.6 C (21.9 F) |
| 1994 | -6.7 C (19.9 F) |
| 1995 | -5.0 C (23.0 F) |
| 1996 | -7.8 C (18.0 F) |
| 1997 | -5.0 C (23.0 F) |
| 1998 | -9.4 C (15.1 F) |
| 1999 | -7.8 C (18.0 F) |
| 2000 | -5.6 C (21.9 F) |
| 2001 | -7.2 C (19.0 F) |
| 2002 | -7.8 C (18.0 F) |
| 2003 | -3.9 C (25.0 F) |
| 2004 | -5.0 C (23.0 F) |
| 2005 | -3.3 C (26.1 F) |
| 2006 | -6.7 C (19.9 F) |
| 2007 | -8.9 C (16.0 F) |
| 2008 | -6.7 C (19.9 F) |
| 2009 | -7.8 C (18.0 F) |
| 2010 | -6.7 C (19.9 F) |
| 2011 | -8.3 C (17.1 F) |
| 2012 | -6.7 C (19.9 F) |
| 2013 | -8.9 C (16.0 F) |
| 2014 | -7.8 C (18.0 F) |
| 2015 | -5.6 C (21.9 F) |
| 2016 | -5.0 C (23.0 F) |
| 2024 | 0.0 C (32.0 F) |
| 2025 | -5.0 C (23.0 F) |
| 2026 | -5.0 C (23.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 37.1 mm (1.5 in) |
| 1949 | 111.0 mm (4.4 in) |
| 1950 | 57.2 mm (2.3 in) |
| 1951 | 77.7 mm (3.1 in) |
| 1952 | 118.4 mm (4.7 in) |
| 1953 | 34.8 mm (1.4 in) |
| 1954 | 112.3 mm (4.4 in) |
| 1955 | 62.2 mm (2.4 in) |
| 1956 | 163.6 mm (6.4 in) |
| 1957 | 83.6 mm (3.3 in) |
| 1958 | 100.1 mm (3.9 in) |
| 1959 | 78.7 mm (3.1 in) |
| 1960 | 44.7 mm (1.8 in) |
| 1961 | 65.5 mm (2.6 in) |
| 1962 | 196.6 mm (7.7 in) |
| 1963 | 132.1 mm (5.2 in) |
| 1964 | 77.5 mm (3.1 in) |
| 1965 | 170.4 mm (6.7 in) |
| 1966 | 173.2 mm (6.8 in) |
| 1967 | 122.2 mm (4.8 in) |
| 1968 | 66.0 mm (2.6 in) |
| 1969 | 303.8 mm (12.0 in) |
| 1970 | 187.2 mm (7.4 in) |
| 1971 | 85.9 mm (3.4 in) |
| 1972 | 64.3 mm (2.5 in) |
| 1973 | 248.7 mm (9.8 in) |
| 1974 | 241.3 mm (9.5 in) |
| 1975 | 94.7 mm (3.7 in) |
| 1976 | 140.0 mm (5.5 in) |
| 1977 | 147.3 mm (5.8 in) |
| 1978 | 190.2 mm (7.5 in) |
| 1979 | 94.0 mm (3.7 in) |
| 1980 | 167.1 mm (6.6 in) |
| 1981 | 115.1 mm (4.5 in) |
| 1982 | 146.1 mm (5.8 in) |
| 1983 | 225.0 mm (8.9 in) |
| 1984 | 107.4 mm (4.2 in) |
| 1985 | 86.6 mm (3.4 in) |
| 1986 | 144.8 mm (5.7 in) |
| 1987 | 79.8 mm (3.1 in) |
| 1988 | 137.9 mm (5.4 in) |
| 1989 | 142.0 mm (5.6 in) |
| 1990 | 117.3 mm (4.6 in) |
| 1991 | 177.0 mm (7.0 in) |
| 1992 | 158.2 mm (6.2 in) |
| 1993 | 112.0 mm (4.4 in) |
| 1994 | 68.3 mm (2.7 in) |
| 1995 | 134.4 mm (5.3 in) |
| 1996 | 183.4 mm (7.2 in) |
| 1997 | 76.7 mm (3.0 in) |
| 1998 | 212.1 mm (8.4 in) |
| 1999 | 40.6 mm (1.6 in) |
| 2000 | 130.0 mm (5.1 in) |
| 2001 | 126.0 mm (5.0 in) |
| 2002 | 85.9 mm (3.4 in) |
| 2003 | 195.1 mm (7.7 in) |
| 2004 | 138.9 mm (5.5 in) |
| 2005 | 75.9 mm (3.0 in) |
| 2006 | 103.4 mm (4.1 in) |
| 2007 | 32.0 mm (1.3 in) |
| 2008 | 78.5 mm (3.1 in) |
| 2009 | 80.8 mm (3.2 in) |
| 2010 | 89.7 mm (3.5 in) |
| 2011 | 83.1 mm (3.3 in) |
| 2012 | 93.7 mm (3.7 in) |
| 2013 | 65.8 mm (2.6 in) |
| 2014 | 201.9 mm (7.9 in) |
| 2015 | 84.8 mm (3.3 in) |
| 2016 | 108.7 mm (4.3 in) |
| 2024 | 75.9 mm (3.0 in) |
| 2025 | 157.0 mm (6.2 in) |
| 2026 | 114.0 mm (4.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 43.0 mm (1.7 in) |
| 1949 | 137.2 mm (5.4 in) |
| 1950 | 75.0 mm (3.0 in) |
| 1951 | 155.5 mm (6.1 in) |
| 1952 | 276.4 mm (10.9 in) |
| 1953 | 47.3 mm (1.9 in) |
| 1954 | 153.2 mm (6.0 in) |
| 1955 | 99.6 mm (3.9 in) |
| 1956 | 265.9 mm (10.5 in) |
| 1957 | 162.9 mm (6.4 in) |
| 1958 | 194.3 mm (7.6 in) |
| 1959 | 115.2 mm (4.5 in) |
| 1960 | 113.1 mm (4.5 in) |
| 1961 | 91.1 mm (3.6 in) |
| 1962 | 426.0 mm (16.8 in) |
| 1963 | 169.2 mm (6.7 in) |
| 1964 | 95.6 mm (3.8 in) |
| 1965 | 404.0 mm (15.9 in) |
| 1966 | 426.6 mm (16.8 in) |
| 1967 | 272.8 mm (10.7 in) |
| 1968 | 71.6 mm (2.8 in) |
| 1969 | 652.8 mm (25.7 in) |
| 1970 | 267.7 mm (10.5 in) |
| 1971 | 202.2 mm (8.0 in) |
| 1972 | 113.8 mm (4.5 in) |
| 1973 | 379.3 mm (14.9 in) |
| 1974 | 532.2 mm (21.0 in) |
| 1975 | 258.1 mm (10.2 in) |
| 1976 | 370.4 mm (14.6 in) |
| 1977 | 285.0 mm (11.2 in) |
| 1978 | 602.7 mm (23.7 in) |
| 1979 | 167.6 mm (6.6 in) |
| 1980 | 525.0 mm (20.7 in) |
| 1981 | 208.6 mm (8.2 in) |
| 1982 | 244.5 mm (9.6 in) |
| 1983 | 622.5 mm (24.5 in) |
| 1984 | 251.4 mm (9.9 in) |
| 1985 | 137.9 mm (5.4 in) |
| 1986 | 200.7 mm (7.9 in) |
| 1987 | 187.2 mm (7.4 in) |
| 1988 | 197.1 mm (7.8 in) |
| 1989 | 159.5 mm (6.3 in) |
| 1990 | 139.9 mm (5.5 in) |
| 1991 | 342.5 mm (13.5 in) |
| 1992 | 336.8 mm (13.3 in) |
| 1993 | 322.3 mm (12.7 in) |
| 1994 | 96.5 mm (3.8 in) |
| 1995 | 374.9 mm (14.8 in) |
| 1996 | 371.9 mm (14.6 in) |
| 1997 | 123.7 mm (4.9 in) |
| 1998 | 362.8 mm (14.3 in) |
| 1999 | 92.2 mm (3.6 in) |
| 2000 | 226.9 mm (8.9 in) |
| 2001 | 225.2 mm (8.9 in) |
| 2002 | 174.8 mm (6.9 in) |
| 2003 | 284.3 mm (11.2 in) |
| 2004 | 272.3 mm (10.7 in) |
| 2005 | 286.5 mm (11.3 in) |
| 2006 | 123.4 mm (4.9 in) |
| 2007 | 47.6 mm (1.9 in) |
| 2008 | 231.1 mm (9.1 in) |
| 2009 | 115.4 mm (4.5 in) |
| 2010 | 241.9 mm (9.5 in) |
| 2011 | 122.2 mm (4.8 in) |
| 2012 | 112.2 mm (4.4 in) |
| 2013 | 113.3 mm (4.5 in) |
| 2014 | 272.3 mm (10.7 in) |
| 2015 | 89.1 mm (3.5 in) |
| 2016 | 171.4 mm (6.7 in) |
| 2024 | 141.7 mm (5.6 in) |
| 2025 | 391.5 mm (15.4 in) |
| 2026 | 251.4 mm (9.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 108 days |
| 1949 | 149 days |
| 1950 | 136 days |
| 1951 | 106 days |
| 1952 | 142 days |
| 1953 | 146 days |
| 1954 | 185 days |
| 1955 | 101 days |
| 1956 | 128 days |
| 1957 | 122 days |
| 1958 | 95 days |
| 1959 | 85 days |
| 1960 | 163 days |
| 1961 | 107 days |
| 1962 | 111 days |
| 1963 | 84 days |
| 1964 | 140 days |
| 1965 | 55 days |
| 1966 | 131 days |
| 1967 | 80 days |
| 1968 | 143 days |
| 1969 | 117 days |
| 1970 | 112 days |
| 1971 | 140 days |
| 1972 | 67 days |
| 1973 | 104 days |
| 1974 | 154 days |
| 1975 | 118 days |
| 1976 | 65 days |
| 1977 | 83 days |
| 1978 | 127 days |
| 1979 | 169 days |
| 1980 | 194 days |
| 1981 | 136 days |
| 1982 | 55 days |
| 1983 | 104 days |
| 1984 | 50 days |
| 1985 | 117 days |
| 1986 | 54 days |
| 1987 | 64 days |
| 1988 | 84 days |
| 1989 | 122 days |
| 1990 | 104 days |
| 1991 | 81 days |
| 1992 | 99 days |
| 1993 | 127 days |
| 1994 | 139 days |
| 1995 | 107 days |
| 1996 | 166 days |
| 1997 | 93 days |
| 1998 | 83 days |
| 1999 | 118 days |
| 2000 | 83 days |
| 2001 | 116 days |
| 2002 | 132 days |
| 2003 | 65 days |
| 2004 | 181 days |
| 2005 | 133 days |
| 2006 | 119 days |
| 2007 | 93 days |
| 2008 | 132 days |
| 2009 | 143 days |
| 2010 | 126 days |
| 2011 | 56 days |
| 2012 | 65 days |
| 2013 | 152 days |
| 2014 | 92 days |
| 2015 | 45 days |
| 2016 | 111 days |
| 2024 | 106 days |
| 2025 | 105 days |
| 2026 | 118 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
51 years with a frostAcross 51 years with a frost, the median last spring frost at Mt Wilson Cbs falls on 15 May and the median first autumn frost on 9 November, which leaves a median of 174 days between them.
Fitted over all years, the growing season changes by +4.0 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1971 to 2015) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 15 May | n/a | 17 May | n/a | -2.8 days per decade |
| First autumn frost | 9 November | n/a | 9 November | n/a | +1.2 days per decade |
| Growing days | 174 days | n/a | 177 days | n/a | +4.0 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
65 years, 1949 to 2025A day with at least 112.0 mm (4.4 in) of rain is expected about once in 2 years. A day with at least 303.5 mm (11.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 112.0 mm (4.4 in) | |
| 5 years | 162.9 mm (6.4 in) | |
| 10 years | 196.8 mm (7.7 in) | |
| 25 years | 239.7 mm (9.4 in) | |
| 50 years | 271.6 mm (10.7 in) | |
| 100 years | 303.5 mm (11.9 in) | Longer than the 65 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, 65 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: 303.8 mm (12.0 in) in 1969; 248.7 mm (9.8 in) in 1973; 241.3 mm (9.5 in) in 1974.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).