Walnut Creek Weather Records (USC00029158)
Record envelope, standing records and threshold days for Walnut Creek (USC00029158), Arizona, United States, with 112 years of record.
Key Facts for Walnut Creek
- Walnut Creek (USC00029158) is a weather station in Arizona, United States at 34.93 latitude and -112.81 longitude, 1,551 m (5,090 ft) above sea level.
- The station reports from 1915 to 2026, 112 years of record.
- 1,464 records set at Walnut Creek still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Walnut Creek tied a daily record high minimum temperature of 16.7 C (62.1 F) on 29 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Arizona, United States, 34.93 latitude, -112.81 longitude.
- Elevation: 1,551 m (5,090 ft).
- Period of record: 1915 to 2026, 112 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
20 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 23.3 C (73.9 F) | -26.1 C (-15.0 F) | 18.9 C (66.0 F) | -10.6 C (12.9 F) |
| Feb | 26.7 C (80.1 F) | -23.3 C (-9.9 F) | 26.7 C (80.1 F) | -7.2 C (19.0 F) |
| Mar | 33.9 C (93.0 F) | -17.8 C (0.0 F) | 33.9 C (93.0 F) | -4.4 C (24.1 F) |
| Apr | 33.3 C (91.9 F) | -12.8 C (9.0 F) | 27.2 C (81.0 F) | -3.3 C (26.1 F) |
| May | 37.2 C (99.0 F) | -12.8 C (9.0 F) | 34.4 C (93.9 F) | -1.7 C (28.9 F) |
| Jun | 41.1 C (106.0 F) | -3.3 C (26.1 F) | 37.2 C (99.0 F) | 4.4 C (39.9 F) |
| Jul | 45.6 C (114.1 F) | -0.6 C (30.9 F) | 38.3 C (100.9 F) | 4.4 C (39.9 F) |
| Aug | 41.1 C (106.0 F) | -1.1 C (30.0 F) | 38.9 C (102.0 F) | 12.2 C (54.0 F) |
| Sep | 38.9 C (102.0 F) | -5.6 C (21.9 F) | 25.0 C (77.0 F) | 7.8 C (46.0 F) |
| Oct | 35.6 C (96.1 F) | -13.3 C (8.1 F) | n/a | n/a |
| Nov | 30.0 C (86.0 F) | -20.0 C (-4.0 F) | n/a | n/a |
| Dec | 22.2 C (72.0 F) | -29.4 C (-20.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1951 | 18 |
| 1952 | 19 |
| 1953 | 22 |
| 1954 | 9 |
| 1955 | 34 |
| 1956 | 20 |
| 1957 | 20 |
| 1958 | 13 |
| 1959 | 15 |
| 1960 | 15 |
| 1961 | 14 |
| 1962 | 21 |
| 1963 | 22 |
| 1964 | 28 |
| 1965 | 31 |
| 1966 | 18 |
| 1967 | 20 |
| 1968 | 25 |
| 1969 | 40 |
| 1970 | 50 |
| 1971 | 62 |
| 1972 | 28 |
| 1973 | 16 |
| 1974 | 16 |
| 1975 | 16 |
| 1976 | 18 |
| 1977 | 11 |
| 1978 | 21 |
| 1979 | 23 |
| 1980 | 15 |
| 1981 | 9 |
| 1982 | 18 |
| 1983 | 12 |
| 1984 | 11 |
| 1985 | 17 |
| 1986 | 19 |
| 1987 | 12 |
| 1988 | 14 |
| 1989 | 28 |
| 1990 | 25 |
| 1991 | 16 |
| 1992 | 8 |
| 1993 | 6 |
| 1994 | 14 |
| 1995 | 15 |
| 1996 | 32 |
| 1997 | 6 |
| 1998 | 9 |
| 1999 | 14 |
| 2000 | 24 |
| 2001 | 13 |
| 2002 | 13 |
| 2003 | 17 |
| 2004 | 11 |
| 2005 | 9 |
| 2006 | 10 |
| 2007 | 14 |
| 2008 | 21 |
| 2009 | 14 |
| 2010 | 19 |
| 2011 | 22 |
| 2012 | 9 |
| 2013 | 13 |
| 2014 | 19 |
| 2015 | 20 |
| 2016 | 21 |
| 2017 | 24 |
| 2018 | 32 |
| 2019 | 19 |
| 2020 | 33 |
| 2021 | 18 |
| 2022 | 8 |
| 2023 | 14 |
| 2024 | 29 |
| 2025 | 30 |
| 2026 | 23 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1983-08-16 | Record high minimum temperature | Record high minimum temperature 22.8 C (73.0 F) |
| 1990-07-01 | Record high minimum temperature | Record high minimum temperature 23.3 C (73.9 F) |
| 1990-07-02 | Record high minimum temperature | Record high minimum temperature 23.9 C (75.0 F) |
| 2004-09-19 | Record daily precipitation | Record daily precipitation 147.3 mm (5.8 in) |
| 2018-07-23 | Record high minimum temperature | Record high minimum temperature 24.4 C (75.9 F) |
| 2018-08-05 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
Wettest Day of Each Month
Sep: 147.3 mm (5.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 84.1 mm (3.3 in) | 15 January 2019 |
| Feb | 76.2 mm (3.0 in) | 21 February 2019 |
| Mar | 49.0 mm (1.9 in) | 1 March 1978 |
| Apr | 43.2 mm (1.7 in) | 17 April 1917 |
| May | 37.3 mm (1.5 in) | 30 May 1972 |
| Jun | 139.7 mm (5.5 in) | 28 June 1927 |
| Jul | 61.0 mm (2.4 in) | 10 July 1985 |
| Aug | 116.1 mm (4.6 in) | 6 August 1931 |
| Sep | 147.3 mm (5.8 in) | 19 September 2004 |
| Oct | 68.6 mm (2.7 in) | 6 October 1916 |
| Nov | 66.3 mm (2.6 in) | 11 November 1978 |
| Dec | 58.4 mm (2.3 in) | 10 December 1931 |
Period of Record Coverage
1951 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1951 | 256 | 70% | No |
| 1952 | 366 | 100% | Yes |
| 1953 | 359 | 98% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 335 | 92% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 363 | 99% | Yes |
| 1963 | 363 | 99% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 330 | 90% | Yes |
| 1967 | 334 | 92% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 362 | 99% | Yes |
| 1970 | 361 | 99% | Yes |
| 1971 | 363 | 99% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 361 | 99% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 359 | 98% | 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 | 363 | 99% | Yes |
| 1983 | 351 | 96% | Yes |
| 1984 | 341 | 93% | Yes |
| 1985 | 331 | 91% | Yes |
| 1986 | 355 | 97% | Yes |
| 1987 | 361 | 99% | Yes |
| 1988 | 358 | 98% | Yes |
| 1989 | 360 | 99% | Yes |
| 1990 | 350 | 96% | Yes |
| 1991 | 360 | 99% | Yes |
| 1992 | 364 | 99% | Yes |
| 1993 | 360 | 99% | Yes |
| 1994 | 362 | 99% | Yes |
| 1995 | 358 | 98% | Yes |
| 1996 | 359 | 98% | Yes |
| 1997 | 363 | 99% | Yes |
| 1998 | 359 | 98% | Yes |
| 1999 | 361 | 99% | Yes |
| 2000 | 359 | 98% | Yes |
| 2001 | 347 | 95% | Yes |
| 2002 | 361 | 99% | Yes |
| 2003 | 328 | 90% | No |
| 2004 | 364 | 99% | Yes |
| 2005 | 362 | 99% | Yes |
| 2006 | 361 | 99% | Yes |
| 2007 | 358 | 98% | Yes |
| 2008 | 358 | 98% | Yes |
| 2009 | 360 | 99% | Yes |
| 2010 | 363 | 99% | Yes |
| 2011 | 334 | 92% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 340 | 93% | Yes |
| 2016 | 335 | 92% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 364 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 364 | 100% | Yes |
| 2024 | 365 | 100% | Yes |
| 2025 | 363 | 99% | Yes |
| 2026 | 244 | 67% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 29 August 2026 | Walnut Creek, US | daily high min (Tie, Provisional) | 16.7 C (62.1 F) | tie | 53 years | 5 of 100 (Routine) |
| 24 August 2026 | Walnut Creek, US | daily high min (Provisional) | 17.8 C (64.0 F) | 0.6 C (1.1 F) | 20 years | 14 of 100 (Routine) |
| 14 August 2026 | Walnut Creek, US | daily rain | 28.4 mm (1.1 in) | 5.5 mm (0.22 in) | 95 years | 43 of 100 (Notable) |
| 12 August 2026 | Walnut Creek, US | daily high min (Tie) | 16.7 C (62.1 F) | tie | 45 years | 5 of 100 (Routine) |
| 11 August 2026 | Walnut Creek, US | daily high min | 18.9 C (66.0 F) | 1.7 C (3.1 F) | 47 years | 26 of 100 (Routine) |
| 10 August 2026 | Walnut Creek, US | daily high min | 19.4 C (66.9 F) | 1.1 C (2.0 F) | 60 years | 28 of 100 (Routine) |
| 9 August 2026 | Walnut Creek, US | daily high max (Tie) | 37.8 C (100.0 F) | tie | 0 years | 1 of 100 (Routine) |
| 9 August 2026 | Walnut Creek, US | daily high min (Tie) | 19.4 C (66.9 F) | tie | 3 years | 1 of 100 (Routine) |
| 8 August 2026 | Walnut Creek, US | daily high max | 37.8 C (100.0 F) | 0.6 C (1.1 F) | 0 years | 8 of 100 (Routine) |
| 3 August 2026 | Walnut Creek, US | daily high max (Tie) | 37.8 C (100.0 F) | tie | 32 years | 4 of 100 (Routine) |
| 1 August 2026 | Walnut Creek, US | daily high max (Tie) | 38.9 C (102.0 F) | tie | 32 years | 4 of 100 (Routine) |
| 31 July 2026 | Walnut Creek, US | daily high max (Tie) | 38.3 C (100.9 F) | tie | 24 years | 3 of 100 (Routine) |
| 17 July 2026 | Walnut Creek, US | daily rain | 19.6 mm (0.8 in) | 0.5 mm (0.02 in) | 8 years | 12 of 100 (Routine) |
| 24 June 2026 | Walnut Creek, US | daily high min | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 72 years | 30 of 100 (Routine) |
| 15 June 2026 | Walnut Creek, US | daily rain | 11.2 mm (0.4 in) | 4.6 mm (0.18 in) | 67 years | 20 of 100 (Routine) |
| 12 June 2026 | Walnut Creek, US | daily high min | 16.1 C (61.0 F) | 1.7 C (3.1 F) | 4 years | 12 of 100 (Routine) |
| 11 June 2026 | Walnut Creek, US | daily high min | 16.1 C (61.0 F) | 0.5 C (0.9 F) | 4 years | 9 of 100 (Routine) |
| 10 May 2026 | Walnut Creek, US | daily high max | 32.8 C (91.0 F) | 1.1 C (2.0 F) | 29 years | 17 of 100 (Routine) |
| 4 May 2026 | Walnut Creek, US | daily high min | 8.3 C (46.9 F) | 0.5 C (0.9 F) | 49 years | 22 of 100 (Routine) |
| 31 March 2026 | Walnut Creek, US | daily high min | 7.2 C (45.0 F) | 2.2 C (4.0 F) | 65 years | 32 of 100 (Routine) |
Climate Trend
64 complete years, 1953 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1953 | 11.4 C | -0.36 C |
| 1954 | 11.8 C | +0.10 C |
| 1955 | 10.6 C | -1.10 C |
| 1956 | 11.2 C | -0.56 C |
| 1957 | 11.2 C | -0.52 C |
| 1958 | 11.5 C | -0.28 C |
| 1960 | 11.3 C | -0.44 C |
| 1961 | 11.4 C | -0.33 C |
| 1962 | 11.2 C | -0.57 C |
| 1963 | 11.5 C | -0.28 C |
| 1964 | 10.5 C | -1.23 C |
| 1965 | 10.8 C | -0.98 C |
| 1968 | 10.5 C | -1.28 C |
| 1969 | 9.7 C | -2.07 C |
| 1970 | 8.9 C | -2.88 C |
| 1971 | 10.5 C | -1.21 C |
| 1972 | 11.6 C | -0.11 C |
| 1973 | 11.2 C | -0.56 C |
| 1974 | 11.5 C | -0.29 C |
| 1975 | 10.8 C | -0.99 C |
| 1976 | 11.2 C | -0.51 C |
| 1977 | 11.9 C | +0.15 C |
| 1978 | 11.4 C | -0.31 C |
| 1979 | 10.9 C | -0.80 C |
| 1980 | 11.7 C | -0.02 C |
| 1981 | 12.5 C | +0.72 C |
| 1982 | 11.1 C | -0.69 C |
| 1983 | 11.6 C | -0.11 C |
| 1984 | 11.6 C | -0.19 C |
| 1986 | 11.9 C | +0.13 C |
| 1987 | 11.2 C | -0.59 C |
| 1988 | 11.9 C | +0.15 C |
| 1989 | 12.2 C | +0.45 C |
| 1990 | 11.3 C | -0.44 C |
| 1991 | 11.7 C | -0.08 C |
| 1992 | 11.9 C | +0.15 C |
| 1993 | 12.0 C | +0.22 C |
| 1995 | 12.4 C | +0.61 C |
| 1996 | 12.8 C | +1.06 C |
| 1997 | 11.7 C | -0.01 C |
| 1998 | 10.7 C | -1.01 C |
| 1999 | 12.4 C | +0.62 C |
| 2000 | 13.0 C | +1.30 C |
| 2001 | 12.7 C | +0.95 C |
| 2002 | 12.7 C | +0.93 C |
| 2004 | 11.9 C | +0.13 C |
| 2005 | 12.5 C | +0.73 C |
| 2006 | 11.9 C | +0.20 C |
| 2007 | 12.6 C | +0.81 C |
| 2008 | 11.9 C | +0.13 C |
| 2009 | 11.9 C | +0.12 C |
| 2010 | 11.6 C | -0.16 C |
| 2012 | 12.2 C | +0.48 C |
| 2013 | 11.7 C | -0.06 C |
| 2014 | 12.9 C | +1.18 C |
| 2017 | 13.3 C | +1.54 C |
| 2018 | 13.2 C | +1.44 C |
| 2019 | 12.0 C | +0.21 C |
| 2020 | 13.1 C | +1.33 C |
| 2021 | 13.0 C | +1.28 C |
| 2022 | 12.9 C | +1.14 C |
| 2023 | 12.1 C | +0.31 C |
| 2024 | 13.0 C | +1.28 C |
| 2025 | 13.2 C | +1.44 C |
The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1953 to 2025. In Fahrenheit: 0.5 F (0.4 to 0.7) per decade. The slope is a straight line fitted to 64 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 (0.4 to 0.7) per decade | 1953 to 2025 | 64 | Rise |
| Mean daily maximum | 0.3 C (0.2 to 0.4) per decade | 0.6 F (0.4 to 0.8) per decade | 1953 to 2025 | 64 | Rise |
| Mean daily minimum | 0.3 C (0.2 to 0.3) per decade | 0.5 F (0.3 to 0.6) per decade | 1953 to 2025 | 64 | 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
1915 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.6 C (114.1 F) | 1969 | 38.1 C (100.5 F) | 76 |
| Coldest night (TNn) | -29.4 C (-20.9 F) | 1968 | -15.6 C (3.9 F) | 76 |
| Wettest day (Rx1day) | 147.3 mm (5.8 in) | 2004 | 40.0 mm (1.6 in) | 112 |
| Wettest five days (Rx5day) | 178.0 mm (7.0 in) | 2004 | 61.6 mm (2.4 in) | 112 |
| Longest dry spell (CDD) | 111 days | 2017 | 53 days | 112 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1915 | n/a |
| 1916 | n/a |
| 1917 | n/a |
| 1918 | n/a |
| 1919 | n/a |
| 1920 | n/a |
| 1921 | n/a |
| 1922 | n/a |
| 1923 | n/a |
| 1924 | n/a |
| 1925 | n/a |
| 1926 | n/a |
| 1927 | n/a |
| 1928 | n/a |
| 1929 | n/a |
| 1930 | n/a |
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | 36.7 C (98.1 F) |
| 1952 | 36.7 C (98.1 F) |
| 1953 | 35.0 C (95.0 F) |
| 1954 | 36.1 C (97.0 F) |
| 1955 | 36.7 C (98.1 F) |
| 1956 | 37.2 C (99.0 F) |
| 1957 | 36.1 C (97.0 F) |
| 1958 | 37.2 C (99.0 F) |
| 1959 | 36.1 C (97.0 F) |
| 1960 | 36.1 C (97.0 F) |
| 1961 | 38.9 C (102.0 F) |
| 1962 | 36.7 C (98.1 F) |
| 1963 | 35.0 C (95.0 F) |
| 1964 | 35.6 C (96.1 F) |
| 1965 | 36.7 C (98.1 F) |
| 1966 | 37.2 C (99.0 F) |
| 1967 | 37.8 C (100.0 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 45.6 C (114.1 F) |
| 1970 | 36.7 C (98.1 F) |
| 1971 | 40.6 C (105.1 F) |
| 1972 | 40.0 C (104.0 F) |
| 1973 | 40.0 C (104.0 F) |
| 1974 | 38.3 C (100.9 F) |
| 1975 | 37.2 C (99.0 F) |
| 1976 | 37.8 C (100.0 F) |
| 1977 | 36.7 C (98.1 F) |
| 1978 | 36.1 C (97.0 F) |
| 1979 | 38.9 C (102.0 F) |
| 1980 | 37.8 C (100.0 F) |
| 1981 | 38.3 C (100.9 F) |
| 1982 | 35.6 C (96.1 F) |
| 1983 | 36.7 C (98.1 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 38.9 C (102.0 F) |
| 1986 | 36.7 C (98.1 F) |
| 1987 | 36.7 C (98.1 F) |
| 1988 | 37.2 C (99.0 F) |
| 1989 | 40.0 C (104.0 F) |
| 1990 | 40.0 C (104.0 F) |
| 1991 | 37.2 C (99.0 F) |
| 1992 | 36.7 C (98.1 F) |
| 1993 | 38.9 C (102.0 F) |
| 1994 | 40.0 C (104.0 F) |
| 1995 | 40.0 C (104.0 F) |
| 1996 | 40.0 C (104.0 F) |
| 1997 | 38.3 C (100.9 F) |
| 1998 | 38.9 C (102.0 F) |
| 1999 | 37.8 C (100.0 F) |
| 2000 | 38.3 C (100.9 F) |
| 2001 | 37.8 C (100.0 F) |
| 2002 | 38.9 C (102.0 F) |
| 2003 | 40.6 C (105.1 F) |
| 2004 | 36.1 C (97.0 F) |
| 2005 | 40.0 C (104.0 F) |
| 2006 | 38.3 C (100.9 F) |
| 2007 | 40.6 C (105.1 F) |
| 2008 | 38.9 C (102.0 F) |
| 2009 | 38.3 C (100.9 F) |
| 2010 | 37.8 C (100.0 F) |
| 2011 | 36.7 C (98.1 F) |
| 2012 | 37.8 C (100.0 F) |
| 2013 | 40.0 C (104.0 F) |
| 2014 | 37.8 C (100.0 F) |
| 2015 | 38.3 C (100.9 F) |
| 2016 | 43.9 C (111.0 F) |
| 2017 | 39.4 C (102.9 F) |
| 2018 | 38.3 C (100.9 F) |
| 2019 | 41.1 C (106.0 F) |
| 2020 | 41.7 C (107.1 F) |
| 2021 | 41.1 C (106.0 F) |
| 2022 | 38.9 C (102.0 F) |
| 2023 | 41.1 C (106.0 F) |
| 2024 | 40.0 C (104.0 F) |
| 2025 | 38.3 C (100.9 F) |
| 2026 | 38.9 C (102.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1915 | n/a |
| 1916 | n/a |
| 1917 | n/a |
| 1918 | n/a |
| 1919 | n/a |
| 1920 | n/a |
| 1921 | n/a |
| 1922 | n/a |
| 1923 | n/a |
| 1924 | n/a |
| 1925 | n/a |
| 1926 | n/a |
| 1927 | n/a |
| 1928 | n/a |
| 1929 | n/a |
| 1930 | n/a |
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | -17.2 C (1.0 F) |
| 1952 | -16.1 C (3.0 F) |
| 1953 | -13.9 C (7.0 F) |
| 1954 | -15.0 C (5.0 F) |
| 1955 | -15.0 C (5.0 F) |
| 1956 | -17.2 C (1.0 F) |
| 1957 | -16.7 C (1.9 F) |
| 1958 | -15.0 C (5.0 F) |
| 1959 | -17.8 C (0.0 F) |
| 1960 | -17.8 C (0.0 F) |
| 1961 | -18.3 C (-0.9 F) |
| 1962 | -23.3 C (-9.9 F) |
| 1963 | -16.1 C (3.0 F) |
| 1964 | -20.0 C (-4.0 F) |
| 1965 | -17.2 C (1.0 F) |
| 1966 | -21.7 C (-7.1 F) |
| 1967 | -17.8 C (0.0 F) |
| 1968 | -29.4 C (-20.9 F) |
| 1969 | -17.8 C (0.0 F) |
| 1970 | -20.6 C (-5.1 F) |
| 1971 | -26.1 C (-15.0 F) |
| 1972 | -19.4 C (-2.9 F) |
| 1973 | -13.3 C (8.1 F) |
| 1974 | -16.1 C (3.0 F) |
| 1975 | -15.0 C (5.0 F) |
| 1976 | -15.0 C (5.0 F) |
| 1977 | -14.4 C (6.1 F) |
| 1978 | -18.3 C (-0.9 F) |
| 1979 | -25.6 C (-14.1 F) |
| 1980 | -10.0 C (14.0 F) |
| 1981 | -12.8 C (9.0 F) |
| 1982 | -16.7 C (1.9 F) |
| 1983 | -16.1 C (3.0 F) |
| 1984 | -13.9 C (7.0 F) |
| 1985 | -17.8 C (0.0 F) |
| 1986 | -13.9 C (7.0 F) |
| 1987 | -17.8 C (0.0 F) |
| 1988 | -17.8 C (0.0 F) |
| 1989 | -15.6 C (3.9 F) |
| 1990 | -23.9 C (-11.0 F) |
| 1991 | -20.0 C (-4.0 F) |
| 1992 | -11.7 C (10.9 F) |
| 1993 | -12.8 C (9.0 F) |
| 1994 | -11.7 C (10.9 F) |
| 1995 | -12.8 C (9.0 F) |
| 1996 | -20.0 C (-4.0 F) |
| 1997 | -15.6 C (3.9 F) |
| 1998 | -12.8 C (9.0 F) |
| 1999 | -11.7 C (10.9 F) |
| 2000 | -13.9 C (7.0 F) |
| 2001 | -15.0 C (5.0 F) |
| 2002 | -14.4 C (6.1 F) |
| 2003 | -11.7 C (10.9 F) |
| 2004 | -15.0 C (5.0 F) |
| 2005 | -15.0 C (5.0 F) |
| 2006 | -15.6 C (3.9 F) |
| 2007 | -17.8 C (0.0 F) |
| 2008 | -12.8 C (9.0 F) |
| 2009 | -14.4 C (6.1 F) |
| 2010 | -18.9 C (-2.0 F) |
| 2011 | -20.6 C (-5.1 F) |
| 2012 | -12.2 C (10.0 F) |
| 2013 | -18.3 C (-0.9 F) |
| 2014 | -15.0 C (5.0 F) |
| 2015 | -17.8 C (0.0 F) |
| 2016 | -12.8 C (9.0 F) |
| 2017 | -14.4 C (6.1 F) |
| 2018 | -15.6 C (3.9 F) |
| 2019 | -20.0 C (-4.0 F) |
| 2020 | -11.7 C (10.9 F) |
| 2021 | -15.0 C (5.0 F) |
| 2022 | -15.0 C (5.0 F) |
| 2023 | -11.7 C (10.9 F) |
| 2024 | -13.9 C (7.0 F) |
| 2025 | -16.1 C (3.0 F) |
| 2026 | -10.6 C (12.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1915 | 23.4 mm (0.9 in) |
| 1916 | 68.6 mm (2.7 in) |
| 1917 | 43.2 mm (1.7 in) |
| 1918 | 48.3 mm (1.9 in) |
| 1919 | 44.5 mm (1.8 in) |
| 1920 | 47.0 mm (1.9 in) |
| 1921 | 30.5 mm (1.2 in) |
| 1922 | 28.4 mm (1.1 in) |
| 1923 | 32.3 mm (1.3 in) |
| 1924 | 45.7 mm (1.8 in) |
| 1925 | 40.6 mm (1.6 in) |
| 1926 | 50.8 mm (2.0 in) |
| 1927 | 139.7 mm (5.5 in) |
| 1928 | 27.9 mm (1.1 in) |
| 1929 | 27.4 mm (1.1 in) |
| 1930 | 37.6 mm (1.5 in) |
| 1931 | 116.1 mm (4.6 in) |
| 1932 | 26.7 mm (1.1 in) |
| 1933 | 38.9 mm (1.5 in) |
| 1934 | 34.5 mm (1.4 in) |
| 1935 | 26.2 mm (1.0 in) |
| 1936 | 31.8 mm (1.3 in) |
| 1937 | 33.0 mm (1.3 in) |
| 1938 | 44.7 mm (1.8 in) |
| 1939 | 53.3 mm (2.1 in) |
| 1940 | 49.8 mm (2.0 in) |
| 1941 | 36.3 mm (1.4 in) |
| 1942 | 33.5 mm (1.3 in) |
| 1943 | 17.0 mm (0.7 in) |
| 1944 | 40.6 mm (1.6 in) |
| 1945 | 53.3 mm (2.1 in) |
| 1946 | 33.3 mm (1.3 in) |
| 1947 | 21.8 mm (0.9 in) |
| 1948 | 43.2 mm (1.7 in) |
| 1949 | 30.2 mm (1.2 in) |
| 1950 | 24.4 mm (1.0 in) |
| 1951 | 58.7 mm (2.3 in) |
| 1952 | 45.2 mm (1.8 in) |
| 1953 | 34.0 mm (1.3 in) |
| 1954 | 44.7 mm (1.8 in) |
| 1955 | 56.9 mm (2.2 in) |
| 1956 | 31.8 mm (1.3 in) |
| 1957 | 48.3 mm (1.9 in) |
| 1958 | 44.2 mm (1.7 in) |
| 1959 | 40.1 mm (1.6 in) |
| 1960 | 26.7 mm (1.1 in) |
| 1961 | 32.3 mm (1.3 in) |
| 1962 | 28.4 mm (1.1 in) |
| 1963 | 25.4 mm (1.0 in) |
| 1964 | 20.6 mm (0.8 in) |
| 1965 | 35.1 mm (1.4 in) |
| 1966 | 27.9 mm (1.1 in) |
| 1967 | 50.8 mm (2.0 in) |
| 1968 | 39.4 mm (1.6 in) |
| 1969 | 37.6 mm (1.5 in) |
| 1970 | 55.9 mm (2.2 in) |
| 1971 | 48.3 mm (1.9 in) |
| 1972 | 45.7 mm (1.8 in) |
| 1973 | 32.8 mm (1.3 in) |
| 1974 | 44.5 mm (1.8 in) |
| 1975 | 31.2 mm (1.2 in) |
| 1976 | 45.2 mm (1.8 in) |
| 1977 | 27.9 mm (1.1 in) |
| 1978 | 66.3 mm (2.6 in) |
| 1979 | 47.0 mm (1.9 in) |
| 1980 | 58.7 mm (2.3 in) |
| 1981 | 40.4 mm (1.6 in) |
| 1982 | 49.5 mm (1.9 in) |
| 1983 | 64.3 mm (2.5 in) |
| 1984 | 37.3 mm (1.5 in) |
| 1985 | 61.0 mm (2.4 in) |
| 1986 | 43.7 mm (1.7 in) |
| 1987 | 35.1 mm (1.4 in) |
| 1988 | 39.6 mm (1.6 in) |
| 1989 | 27.9 mm (1.1 in) |
| 1990 | 57.2 mm (2.3 in) |
| 1991 | 46.2 mm (1.8 in) |
| 1992 | 48.0 mm (1.9 in) |
| 1993 | 60.7 mm (2.4 in) |
| 1994 | 38.1 mm (1.5 in) |
| 1995 | 40.6 mm (1.6 in) |
| 1996 | 22.1 mm (0.9 in) |
| 1997 | 46.7 mm (1.8 in) |
| 1998 | 53.1 mm (2.1 in) |
| 1999 | 50.3 mm (2.0 in) |
| 2000 | 41.4 mm (1.6 in) |
| 2001 | 47.8 mm (1.9 in) |
| 2002 | 23.1 mm (0.9 in) |
| 2003 | 32.3 mm (1.3 in) |
| 2004 | 147.3 mm (5.8 in) |
| 2005 | 34.5 mm (1.4 in) |
| 2006 | 29.2 mm (1.1 in) |
| 2007 | 35.6 mm (1.4 in) |
| 2008 | 49.5 mm (1.9 in) |
| 2009 | 40.9 mm (1.6 in) |
| 2010 | 54.6 mm (2.1 in) |
| 2011 | 30.2 mm (1.2 in) |
| 2012 | 25.9 mm (1.0 in) |
| 2013 | 38.1 mm (1.5 in) |
| 2014 | 45.7 mm (1.8 in) |
| 2015 | 33.8 mm (1.3 in) |
| 2016 | 36.6 mm (1.4 in) |
| 2017 | 20.8 mm (0.8 in) |
| 2018 | 34.8 mm (1.4 in) |
| 2019 | 84.1 mm (3.3 in) |
| 2020 | 25.9 mm (1.0 in) |
| 2021 | 26.7 mm (1.1 in) |
| 2022 | 49.0 mm (1.9 in) |
| 2023 | 44.5 mm (1.8 in) |
| 2024 | 39.9 mm (1.6 in) |
| 2025 | 48.8 mm (1.9 in) |
| 2026 | 28.4 mm (1.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1915 | 50.1 mm (2.0 in) |
| 1916 | 81.3 mm (3.2 in) |
| 1917 | 59.4 mm (2.3 in) |
| 1918 | 63.5 mm (2.5 in) |
| 1919 | 75.2 mm (3.0 in) |
| 1920 | 66.8 mm (2.6 in) |
| 1921 | 51.8 mm (2.0 in) |
| 1922 | 38.6 mm (1.5 in) |
| 1923 | 64.0 mm (2.5 in) |
| 1924 | 83.8 mm (3.3 in) |
| 1925 | 66.1 mm (2.6 in) |
| 1926 | 61.0 mm (2.4 in) |
| 1927 | 139.7 mm (5.5 in) |
| 1928 | 34.3 mm (1.4 in) |
| 1929 | 46.7 mm (1.8 in) |
| 1930 | 48.3 mm (1.9 in) |
| 1931 | 127.3 mm (5.0 in) |
| 1932 | 61.4 mm (2.4 in) |
| 1933 | 64.5 mm (2.5 in) |
| 1934 | 54.3 mm (2.1 in) |
| 1935 | 55.0 mm (2.2 in) |
| 1936 | 76.5 mm (3.0 in) |
| 1937 | 87.2 mm (3.4 in) |
| 1938 | 71.3 mm (2.8 in) |
| 1939 | 117.4 mm (4.6 in) |
| 1940 | 58.4 mm (2.3 in) |
| 1941 | 42.1 mm (1.7 in) |
| 1942 | 44.4 mm (1.7 in) |
| 1943 | 27.7 mm (1.1 in) |
| 1944 | 82.1 mm (3.2 in) |
| 1945 | 66.0 mm (2.6 in) |
| 1946 | 89.4 mm (3.5 in) |
| 1947 | 40.9 mm (1.6 in) |
| 1948 | 43.2 mm (1.7 in) |
| 1949 | 51.6 mm (2.0 in) |
| 1950 | 46.8 mm (1.8 in) |
| 1951 | 100.4 mm (4.0 in) |
| 1952 | 58.7 mm (2.3 in) |
| 1953 | 75.0 mm (3.0 in) |
| 1954 | 69.1 mm (2.7 in) |
| 1955 | 69.1 mm (2.7 in) |
| 1956 | 61.3 mm (2.4 in) |
| 1957 | 107.4 mm (4.2 in) |
| 1958 | 49.3 mm (1.9 in) |
| 1959 | 74.5 mm (2.9 in) |
| 1960 | 38.7 mm (1.5 in) |
| 1961 | 44.5 mm (1.8 in) |
| 1962 | 42.4 mm (1.7 in) |
| 1963 | 52.6 mm (2.1 in) |
| 1964 | 68.9 mm (2.7 in) |
| 1965 | 74.2 mm (2.9 in) |
| 1966 | 41.0 mm (1.6 in) |
| 1967 | 66.2 mm (2.6 in) |
| 1968 | 54.4 mm (2.1 in) |
| 1969 | 43.0 mm (1.7 in) |
| 1970 | 112.1 mm (4.4 in) |
| 1971 | 62.3 mm (2.5 in) |
| 1972 | 102.9 mm (4.1 in) |
| 1973 | 63.1 mm (2.5 in) |
| 1974 | 48.2 mm (1.9 in) |
| 1975 | 43.9 mm (1.7 in) |
| 1976 | 119.0 mm (4.7 in) |
| 1977 | 34.3 mm (1.4 in) |
| 1978 | 107.0 mm (4.2 in) |
| 1979 | 49.8 mm (2.0 in) |
| 1980 | 92.0 mm (3.6 in) |
| 1981 | 70.9 mm (2.8 in) |
| 1982 | 60.7 mm (2.4 in) |
| 1983 | 93.6 mm (3.7 in) |
| 1984 | 53.6 mm (2.1 in) |
| 1985 | 72.7 mm (2.9 in) |
| 1986 | 61.7 mm (2.4 in) |
| 1987 | 84.6 mm (3.3 in) |
| 1988 | 58.2 mm (2.3 in) |
| 1989 | 35.3 mm (1.4 in) |
| 1990 | 59.0 mm (2.3 in) |
| 1991 | 86.4 mm (3.4 in) |
| 1992 | 80.3 mm (3.2 in) |
| 1993 | 90.9 mm (3.6 in) |
| 1994 | 43.2 mm (1.7 in) |
| 1995 | 60.5 mm (2.4 in) |
| 1996 | 43.9 mm (1.7 in) |
| 1997 | 49.3 mm (1.9 in) |
| 1998 | 53.6 mm (2.1 in) |
| 1999 | 60.5 mm (2.4 in) |
| 2000 | 56.7 mm (2.2 in) |
| 2001 | 70.7 mm (2.8 in) |
| 2002 | 31.6 mm (1.2 in) |
| 2003 | 46.0 mm (1.8 in) |
| 2004 | 178.0 mm (7.0 in) |
| 2005 | 61.9 mm (2.4 in) |
| 2006 | 33.8 mm (1.3 in) |
| 2007 | 97.2 mm (3.8 in) |
| 2008 | 85.6 mm (3.4 in) |
| 2009 | 52.3 mm (2.1 in) |
| 2010 | 115.8 mm (4.6 in) |
| 2011 | 41.2 mm (1.6 in) |
| 2012 | 63.8 mm (2.5 in) |
| 2013 | 99.0 mm (3.9 in) |
| 2014 | 72.1 mm (2.8 in) |
| 2015 | 52.1 mm (2.1 in) |
| 2016 | 39.4 mm (1.6 in) |
| 2017 | 39.1 mm (1.5 in) |
| 2018 | 59.7 mm (2.4 in) |
| 2019 | 109.2 mm (4.3 in) |
| 2020 | 67.3 mm (2.6 in) |
| 2021 | 66.6 mm (2.6 in) |
| 2022 | 71.3 mm (2.8 in) |
| 2023 | 61.3 mm (2.4 in) |
| 2024 | 91.1 mm (3.6 in) |
| 2025 | 97.3 mm (3.8 in) |
| 2026 | 49.3 mm (1.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1915 | 13 days |
| 1916 | 62 days |
| 1917 | 92 days |
| 1918 | 45 days |
| 1919 | 34 days |
| 1920 | 52 days |
| 1921 | 31 days |
| 1922 | 46 days |
| 1923 | 68 days |
| 1924 | 83 days |
| 1925 | 66 days |
| 1926 | 54 days |
| 1927 | 33 days |
| 1928 | 55 days |
| 1929 | 79 days |
| 1930 | 40 days |
| 1931 | 33 days |
| 1932 | 48 days |
| 1933 | 52 days |
| 1934 | 29 days |
| 1935 | 69 days |
| 1936 | 70 days |
| 1937 | 62 days |
| 1938 | 41 days |
| 1939 | 84 days |
| 1940 | 32 days |
| 1941 | 42 days |
| 1942 | 63 days |
| 1943 | 75 days |
| 1944 | 43 days |
| 1945 | 86 days |
| 1946 | 37 days |
| 1947 | 51 days |
| 1948 | 47 days |
| 1949 | 36 days |
| 1950 | 85 days |
| 1951 | 59 days |
| 1952 | 41 days |
| 1953 | 53 days |
| 1954 | 31 days |
| 1955 | 39 days |
| 1956 | 68 days |
| 1957 | 44 days |
| 1958 | 45 days |
| 1959 | 45 days |
| 1960 | 40 days |
| 1961 | 51 days |
| 1962 | 54 days |
| 1963 | 84 days |
| 1964 | 46 days |
| 1965 | 31 days |
| 1966 | 56 days |
| 1967 | 52 days |
| 1968 | 76 days |
| 1969 | 52 days |
| 1970 | 52 days |
| 1971 | 66 days |
| 1972 | 102 days |
| 1973 | 89 days |
| 1974 | 103 days |
| 1975 | 77 days |
| 1976 | 47 days |
| 1977 | 40 days |
| 1978 | 67 days |
| 1979 | 41 days |
| 1980 | 49 days |
| 1981 | 68 days |
| 1982 | 55 days |
| 1983 | 39 days |
| 1984 | 72 days |
| 1985 | 24 days |
| 1986 | 57 days |
| 1987 | 41 days |
| 1988 | 57 days |
| 1989 | 68 days |
| 1990 | 60 days |
| 1991 | 62 days |
| 1992 | 53 days |
| 1993 | 76 days |
| 1994 | 53 days |
| 1995 | 45 days |
| 1996 | 110 days |
| 1997 | 34 days |
| 1998 | 45 days |
| 1999 | 99 days |
| 2000 | 62 days |
| 2001 | 33 days |
| 2002 | 93 days |
| 2003 | 63 days |
| 2004 | 98 days |
| 2005 | 73 days |
| 2006 | 62 days |
| 2007 | 107 days |
| 2008 | 74 days |
| 2009 | 70 days |
| 2010 | 49 days |
| 2011 | 31 days |
| 2012 | 76 days |
| 2013 | 62 days |
| 2014 | 77 days |
| 2015 | 37 days |
| 2016 | 50 days |
| 2017 | 111 days |
| 2018 | 46 days |
| 2019 | 53 days |
| 2020 | 60 days |
| 2021 | 49 days |
| 2022 | 110 days |
| 2023 | 47 days |
| 2024 | 74 days |
| 2025 | 33 days |
| 2026 | 49 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
64 years with a frostAcross 64 years with a frost, the median last spring frost at Walnut Creek falls on 28 May and the median first autumn frost on 8 October, which leaves a median of 131 days between them.
In 1991 to 2025 the median growing season was 139 days. That is 9 days more than in 1953 to 1986.
Fitted over all years, the growing season changes by +2.8 days per decade at this station.
| Measure | Median, all years | Earliest period (1953 to 1986) | Recent period (1991 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 May | 1 June | 24 May | 8 days earlier | -1.6 days per decade |
| First autumn frost | 8 October | 7 October | 9 October | 2 days later | +1.2 days per decade |
| Growing days | 131 days | 130 days | 139 days | 9 days more | +2.8 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
106 years, 1916 to 2025A day with at least 39.0 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 109.5 mm (4.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 39.0 mm (1.5 in) | |
| 5 years | 53.0 mm (2.1 in) | |
| 10 years | 63.9 mm (2.5 in) | |
| 25 years | 80.0 mm (3.1 in) | |
| 50 years | 93.9 mm (3.7 in) | |
| 100 years | 109.5 mm (4.3 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 106 years of values from 1916 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: 147.3 mm (5.8 in) in 2004; 139.7 mm (5.5 in) in 1927; 116.1 mm (4.6 in) in 1931.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2008 to 2025 against 1961 to 1990Over 2008 to 2025, Walnut Creek had a mean temperature of 12.5 C (54.5 F) and 386.1 mm (15.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Whiteriver 1 SW (United States, 287 km away), White Signal (United States, 488 km away) and Kanab (United States, 235 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Whiteriver 1 SW | United States | 287 km (178 mi) | 12.7 C (54.9 F) | 504.4 mm (19.9 in) | 0.72 |
| White Signal | United States | 488 km (303 mi) | 12.6 C (54.6 F) | 386.3 mm (15.2 in) | 0.73 |
| Kanab | United States | 235 km (146 mi) | 12.4 C (54.4 F) | 340.6 mm (13.4 in) | 0.76 |
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).