Ajo Weather Records (USC00020080)
Record envelope, standing records and threshold days for Ajo (USC00020080), Arizona, United States, with 113 years of record.
Key Facts for Ajo
- Ajo (USC00020080) is a weather station in Arizona, United States at 32.37 latitude and -112.86 longitude, 534 m (1,751 ft) above sea level.
- The station reports from 1914 to 2026, 113 years of record.
- 1,464 records set at Ajo still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Ajo tied a daily record high minimum temperature of 25.6 C (78.1 F) on 8 October 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, 32.37 latitude, -112.86 longitude.
- Elevation: 534 m (1,751 ft).
- Period of record: 1914 to 2026, 113 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
41 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 29.4 C (84.9 F) | -8.3 C (17.1 F) | 27.8 C (82.0 F) | 1.7 C (35.1 F) |
| Feb | 36.1 C (97.0 F) | -5.6 C (21.9 F) | 36.1 C (97.0 F) | 3.9 C (39.0 F) |
| Mar | 43.3 C (109.9 F) | -2.8 C (27.0 F) | 43.3 C (109.9 F) | 8.3 C (46.9 F) |
| Apr | 40.6 C (105.1 F) | 0.6 C (33.1 F) | 36.7 C (98.1 F) | 10.0 C (50.0 F) |
| May | 44.4 C (111.9 F) | -0.6 C (30.9 F) | 44.4 C (111.9 F) | 11.7 C (53.1 F) |
| Jun | 48.3 C (118.9 F) | 6.7 C (44.1 F) | 43.9 C (111.0 F) | 21.1 C (70.0 F) |
| Jul | 47.8 C (118.0 F) | 14.4 C (57.9 F) | 46.7 C (116.1 F) | 21.7 C (71.1 F) |
| Aug | 48.9 C (120.0 F) | 13.9 C (57.0 F) | 47.2 C (117.0 F) | 22.2 C (72.0 F) |
| Sep | 47.8 C (118.0 F) | 5.0 C (41.0 F) | 43.3 C (109.9 F) | 17.2 C (63.0 F) |
| Oct | 45.0 C (113.0 F) | 0.0 C (32.0 F) | 40.6 C (105.1 F) | 24.4 C (75.9 F) |
| Nov | 36.7 C (98.1 F) | -1.1 C (30.0 F) | n/a | n/a |
| Dec | 31.1 C (88.0 F) | -5.6 C (21.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1915 | 24 |
| 1916 | 30 |
| 1917 | 9 |
| 1918 | 14 |
| 1919 | 22 |
| 1920 | 39 |
| 1921 | 52 |
| 1922 | 13 |
| 1923 | 16 |
| 1924 | 5 |
| 1925 | 6 |
| 1926 | 2 |
| 1927 | 11 |
| 1928 | 3 |
| 1929 | 6 |
| 1930 | 14 |
| 1931 | 6 |
| 1932 | 5 |
| 1933 | 11 |
| 1934 | 9 |
| 1935 | 14 |
| 1936 | 6 |
| 1937 | 16 |
| 1938 | 9 |
| 1939 | 7 |
| 1940 | 4 |
| 1941 | 4 |
| 1942 | 3 |
| 1943 | 6 |
| 1944 | 2 |
| 1945 | 10 |
| 1946 | 9 |
| 1947 | 12 |
| 1948 | 10 |
| 1949 | 24 |
| 1950 | 10 |
| 1951 | 18 |
| 1952 | 9 |
| 1953 | 7 |
| 1954 | 7 |
| 1955 | 18 |
| 1956 | 14 |
| 1957 | 15 |
| 1958 | 12 |
| 1959 | 4 |
| 1960 | 8 |
| 1961 | 5 |
| 1962 | 20 |
| 1963 | 14 |
| 1964 | 12 |
| 1965 | 21 |
| 1966 | 5 |
| 1967 | 13 |
| 1968 | 7 |
| 1969 | 11 |
| 1970 | 11 |
| 1971 | 30 |
| 1972 | 15 |
| 1973 | 5 |
| 1974 | 7 |
| 1975 | 15 |
| 1976 | 11 |
| 1977 | 17 |
| 1978 | 14 |
| 1979 | 16 |
| 1980 | 23 |
| 1981 | 18 |
| 1982 | 12 |
| 1983 | 7 |
| 1984 | 12 |
| 1985 | 23 |
| 1986 | 8 |
| 1987 | 4 |
| 1988 | 10 |
| 1989 | 10 |
| 1990 | 13 |
| 1991 | 8 |
| 1992 | 8 |
| 1993 | 2 |
| 1994 | 4 |
| 1995 | 11 |
| 1996 | 14 |
| 1997 | 6 |
| 1998 | 9 |
| 1999 | 13 |
| 2000 | 13 |
| 2001 | 12 |
| 2002 | 6 |
| 2003 | 15 |
| 2004 | 11 |
| 2005 | 4 |
| 2006 | 8 |
| 2007 | 13 |
| 2008 | 5 |
| 2009 | 9 |
| 2010 | 6 |
| 2011 | 7 |
| 2012 | 16 |
| 2013 | 15 |
| 2014 | 5 |
| 2015 | 10 |
| 2016 | 24 |
| 2017 | 32 |
| 2018 | 12 |
| 2019 | 5 |
| 2020 | 37 |
| 2021 | 14 |
| 2022 | 11 |
| 2023 | 37 |
| 2024 | 30 |
| 2025 | 38 |
| 2026 | 50 |
All-Time Record Progression
8 new records| Date | Kind | Detail |
|---|---|---|
| 1946-09-18 | Record daily precipitation | Record daily precipitation 105.4 mm (4.1 in) |
| 1960-12-09 | Record daily snowfall | Record daily snowfall 7.6 cm (3.0 in) |
| 1960-12-09 | Record snow depth | Record snow depth 5.1 cm (2.0 in) |
| 1990-06-26 | Record high minimum temperature | Record high minimum temperature 33.9 C (93.0 F) |
| 1995-07-31 | Record high maximum temperature | Record high maximum temperature 47.2 C (117.0 F) |
| 2003-07-15 | Record high minimum temperature | Record high minimum temperature 35.0 C (95.0 F) |
| 2016-06-20 | Record high maximum temperature | Record high maximum temperature 48.3 C (118.9 F) |
| 2025-08-07 | Record high maximum temperature | Record high maximum temperature 48.9 C (120.0 F) |
Wettest Day of Each Month
Sep: 105.4 mm (4.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 52.1 mm (2.1 in) | 22 January 2010 |
| Feb | 50.8 mm (2.0 in) | 22 February 2019 |
| Mar | 46.2 mm (1.8 in) | 14 March 1944 |
| Apr | 36.6 mm (1.4 in) | 12 April 1941 |
| May | 32.0 mm (1.3 in) | 31 May 1972 |
| Jun | 22.9 mm (0.9 in) | 25 June 2022 |
| Jul | 80.5 mm (3.2 in) | 22 July 1923 |
| Aug | 96.5 mm (3.8 in) | 28 August 1951 |
| Sep | 105.4 mm (4.1 in) | 18 September 1946 |
| Oct | 76.2 mm (3.0 in) | 2 October 2018 |
| Nov | 46.0 mm (1.8 in) | 26 November 1965 |
| Dec | 42.7 mm (1.7 in) | 2 December 1983 |
Period of Record Coverage
1915 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1915 | 345 | 95% | Yes |
| 1916 | 345 | 94% | Yes |
| 1917 | 363 | 99% | Yes |
| 1918 | 365 | 100% | Yes |
| 1919 | 363 | 99% | Yes |
| 1920 | 362 | 99% | Yes |
| 1921 | 357 | 98% | Yes |
| 1922 | 363 | 99% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 363 | 99% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 364 | 100% | Yes |
| 1927 | 361 | 99% | Yes |
| 1928 | 366 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 351 | 96% | Yes |
| 1933 | 352 | 96% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 350 | 96% | Yes |
| 1936 | 365 | 100% | Yes |
| 1937 | 355 | 97% | Yes |
| 1938 | 359 | 98% | Yes |
| 1939 | 356 | 98% | Yes |
| 1940 | 361 | 99% | Yes |
| 1941 | 359 | 98% | Yes |
| 1942 | 358 | 98% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 356 | 98% | Yes |
| 1947 | 356 | 98% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 361 | 99% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 362 | 99% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 335 | 92% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 342 | 94% | Yes |
| 1986 | 253 | 69% | No |
| 1987 | 238 | 65% | No |
| 1988 | 251 | 69% | No |
| 1989 | 250 | 68% | No |
| 1990 | 251 | 69% | No |
| 1991 | 253 | 69% | No |
| 1992 | 252 | 69% | No |
| 1993 | 250 | 68% | No |
| 1994 | 252 | 69% | No |
| 1995 | 251 | 69% | No |
| 1996 | 253 | 69% | No |
| 1997 | 252 | 69% | No |
| 1998 | 254 | 70% | No |
| 1999 | 248 | 68% | No |
| 2000 | 251 | 69% | No |
| 2001 | 252 | 69% | No |
| 2002 | 251 | 69% | No |
| 2003 | 256 | 70% | No |
| 2004 | 259 | 71% | No |
| 2005 | 260 | 71% | No |
| 2006 | 258 | 71% | No |
| 2007 | 245 | 67% | No |
| 2008 | 203 | 55% | No |
| 2009 | 189 | 52% | No |
| 2010 | 347 | 95% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 363 | 99% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 358 | 98% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 364 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 258 | 71% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 8 October 2026 | Ajo, US | daily high min (Tie, Provisional) | 25.6 C (78.1 F) | tie | 29 years | 4 of 100 (Routine) |
| 7 September 2026 | Ajo, US | daily high max (Provisional) | 43.3 C (109.9 F) | 0.5 C (0.9 F) | 1 year | 11 of 100 (Routine) |
| 27 August 2026 | Ajo, US | daily high max (Provisional) | 46.7 C (116.1 F) | 0.6 C (1.1 F) | 3 years | 11 of 100 (Routine) |
| 27 August 2026 | Ajo, US | daily high min (Provisional) | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 3 years | 11 of 100 (Routine) |
| 26 August 2026 | Ajo, US | daily high min (Provisional) | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 28 years | 22 of 100 (Routine) |
| 26 August 2026 | Ajo, US | daily high max (Provisional) | 46.1 C (115.0 F) | 0.5 C (0.9 F) | 3 years | 11 of 100 (Routine) |
| 25 August 2026 | Ajo, US | daily high min (Provisional) | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 40 years | 26 of 100 (Routine) |
| 25 August 2026 | Ajo, US | daily high max (Provisional) | 46.7 C (116.1 F) | 0.6 C (1.1 F) | 5 years | 12 of 100 (Routine) |
| 22 August 2026 | Ajo, US | daily high max (Provisional) | 47.2 C (117.0 F) | 0.5 C (0.9 F) | 7 years | 13 of 100 (Routine) |
| 21 August 2026 | Ajo, US | daily high min (Tie, Provisional) | 30.0 C (86.0 F) | tie | 44 years | 5 of 100 (Routine) |
| 19 August 2026 | Ajo, US | daily high min (Tie, Provisional) | 30.6 C (87.1 F) | tie | 1 year | 2 of 100 (Routine) |
| 18 August 2026 | Ajo, US | daily high min (Tie, Provisional) | 30.0 C (86.0 F) | tie | 77 years | 8 of 100 (Routine) |
| 17 August 2026 | Ajo, US | daily high max (Provisional) | 46.7 C (116.1 F) | 1.1 C (2.0 F) | 5 years | 14 of 100 (Routine) |
| 16 August 2026 | Ajo, US | daily high min (Provisional) | 32.2 C (90.0 F) | 2.2 C (4.0 F) | 64 years | 37 of 100 (Notable) |
| 9 August 2026 | Ajo, US | daily high max | 45.0 C (113.0 F) | 0.6 C (1.1 F) | 5 years | 12 of 100 (Routine) |
| 8 August 2026 | Ajo, US | daily high max | 45.6 C (114.1 F) | 1.2 C (2.2 F) | 85 years | 38 of 100 (Notable) |
| 7 August 2026 | Ajo, US | daily high min | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 0 years | 11 of 100 (Routine) |
| 2 August 2026 | Ajo, US | daily high min | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 76 years | 37 of 100 (Notable) |
| 1 August 2026 | Ajo, US | daily high max | 47.2 C (117.0 F) | 1.6 C (2.9 F) | 53 years | 31 of 100 (Routine) |
| 1 August 2026 | Ajo, US | daily high min | 32.2 C (90.0 F) | 1.6 C (2.9 F) | 31 years | 24 of 100 (Routine) |
Climate Trend
85 complete years, 1915 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1915 | 20.8 C | -1.38 C |
| 1916 | 20.8 C | -1.32 C |
| 1917 | 21.2 C | -0.96 C |
| 1918 | 21.3 C | -0.88 C |
| 1919 | 20.9 C | -1.19 C |
| 1920 | 20.5 C | -1.61 C |
| 1921 | 20.4 C | -1.74 C |
| 1922 | 21.2 C | -0.97 C |
| 1923 | 20.7 C | -1.46 C |
| 1924 | 21.7 C | -0.45 C |
| 1925 | 22.0 C | -0.18 C |
| 1926 | 22.5 C | +0.34 C |
| 1927 | 22.1 C | -0.03 C |
| 1928 | 22.5 C | +0.41 C |
| 1929 | 21.9 C | -0.21 C |
| 1930 | 21.9 C | -0.20 C |
| 1931 | 22.1 C | -0.06 C |
| 1932 | 22.2 C | +0.10 C |
| 1933 | 22.0 C | -0.11 C |
| 1934 | 23.1 C | +0.96 C |
| 1936 | 22.4 C | +0.22 C |
| 1937 | 21.6 C | -0.54 C |
| 1938 | 21.4 C | -0.75 C |
| 1939 | 21.8 C | -0.30 C |
| 1940 | 22.4 C | +0.25 C |
| 1941 | 21.1 C | -1.01 C |
| 1942 | 21.6 C | -0.49 C |
| 1943 | 22.5 C | +0.39 C |
| 1944 | 21.1 C | -1.08 C |
| 1945 | 21.5 C | -0.68 C |
| 1946 | 21.7 C | -0.48 C |
| 1947 | 21.7 C | -0.40 C |
| 1948 | 21.5 C | -0.68 C |
| 1949 | 21.4 C | -0.76 C |
| 1950 | 22.8 C | +0.70 C |
| 1951 | 21.4 C | -0.71 C |
| 1952 | 21.8 C | -0.36 C |
| 1953 | 21.9 C | -0.20 C |
| 1954 | 22.6 C | +0.48 C |
| 1955 | 21.4 C | -0.76 C |
| 1956 | 22.2 C | +0.07 C |
| 1957 | 22.0 C | -0.18 C |
| 1958 | 22.6 C | +0.48 C |
| 1959 | 22.4 C | +0.28 C |
| 1960 | 22.1 C | 0.00 C |
| 1961 | 21.9 C | -0.24 C |
| 1962 | 22.4 C | +0.24 C |
| 1963 | 22.0 C | -0.09 C |
| 1964 | 21.0 C | -1.11 C |
| 1965 | 21.4 C | -0.78 C |
| 1966 | 22.0 C | -0.11 C |
| 1967 | 21.4 C | -0.74 C |
| 1968 | 21.6 C | -0.57 C |
| 1969 | 21.9 C | -0.27 C |
| 1970 | 21.7 C | -0.48 C |
| 1971 | 21.0 C | -1.10 C |
| 1972 | 21.9 C | -0.20 C |
| 1973 | 21.9 C | -0.19 C |
| 1974 | 22.2 C | +0.04 C |
| 1975 | 21.4 C | -0.71 C |
| 1977 | 23.0 C | +0.85 C |
| 1978 | 22.5 C | +0.33 C |
| 1979 | 22.5 C | +0.40 C |
| 1980 | 23.1 C | +1.00 C |
| 1981 | 23.4 C | +1.30 C |
| 1982 | 21.8 C | -0.36 C |
| 1983 | 22.0 C | -0.18 C |
| 1984 | 22.3 C | +0.16 C |
| 1985 | 22.0 C | -0.18 C |
| 1994 | 22.9 C | +0.80 C |
| 2011 | 22.5 C | +0.39 C |
| 2012 | 23.4 C | +1.29 C |
| 2013 | 22.5 C | +0.38 C |
| 2014 | 23.6 C | +1.46 C |
| 2015 | 23.0 C | +0.83 C |
| 2016 | 23.4 C | +1.27 C |
| 2017 | 23.8 C | +1.71 C |
| 2018 | 23.8 C | +1.62 C |
| 2019 | 22.5 C | +0.38 C |
| 2020 | 24.0 C | +1.87 C |
| 2021 | 23.7 C | +1.61 C |
| 2022 | 23.4 C | +1.28 C |
| 2023 | 23.5 C | +1.35 C |
| 2024 | 24.2 C | +2.05 C |
| 2025 | 24.5 C | +2.37 C |
The annual mean temperature here has risen by 0.2 C (0.2 to 0.2) per decade over 1915 to 2025. In Fahrenheit: 0.4 F (0.3 to 0.4) per decade. The slope is a straight line fitted to 85 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 (0.2 to 0.2) per decade | 0.4 F (0.3 to 0.4) per decade | 1915 to 2025 | 85 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1915 to 2025 | 85 | Rise |
| Mean daily minimum | 0.2 C (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.5) per decade | 1915 to 2025 | 85 | 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
1914 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 48.9 C (120.0 F) | 2025 | 44.4 C (111.9 F) | 112 |
| Coldest night (TNn) | -8.3 C (17.1 F) | 1937 | -0.8 C (30.5 F) | 112 |
| Wettest day (Rx1day) | 105.4 mm (4.1 in) | 1946 | 32.5 mm (1.3 in) | 113 |
| Wettest five days (Rx5day) | 145.0 mm (5.7 in) | 1951 | 43.4 mm (1.7 in) | 113 |
| Longest dry spell (CDD) | 182 days | 1996 | 81 days | 113 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1914 | n/a |
| 1915 | 46.1 C (115.0 F) |
| 1916 | 44.4 C (111.9 F) |
| 1917 | 45.0 C (113.0 F) |
| 1918 | 44.4 C (111.9 F) |
| 1919 | 46.1 C (115.0 F) |
| 1920 | 45.0 C (113.0 F) |
| 1921 | 42.8 C (109.0 F) |
| 1922 | 44.4 C (111.9 F) |
| 1923 | 44.4 C (111.9 F) |
| 1924 | 44.4 C (111.9 F) |
| 1925 | 44.4 C (111.9 F) |
| 1926 | 44.4 C (111.9 F) |
| 1927 | 43.9 C (111.0 F) |
| 1928 | 45.6 C (114.1 F) |
| 1929 | 46.1 C (115.0 F) |
| 1930 | 45.0 C (113.0 F) |
| 1931 | 44.4 C (111.9 F) |
| 1932 | 45.0 C (113.0 F) |
| 1933 | 44.4 C (111.9 F) |
| 1934 | 44.4 C (111.9 F) |
| 1935 | 44.4 C (111.9 F) |
| 1936 | 45.6 C (114.1 F) |
| 1937 | 45.0 C (113.0 F) |
| 1938 | 43.9 C (111.0 F) |
| 1939 | 44.4 C (111.9 F) |
| 1940 | 45.0 C (113.0 F) |
| 1941 | 43.3 C (109.9 F) |
| 1942 | 44.4 C (111.9 F) |
| 1943 | 45.6 C (114.1 F) |
| 1944 | 44.4 C (111.9 F) |
| 1945 | 44.4 C (111.9 F) |
| 1946 | 42.2 C (108.0 F) |
| 1947 | 43.9 C (111.0 F) |
| 1948 | 43.9 C (111.0 F) |
| 1949 | 43.3 C (109.9 F) |
| 1950 | 45.0 C (113.0 F) |
| 1951 | 43.9 C (111.0 F) |
| 1952 | 43.3 C (109.9 F) |
| 1953 | 43.9 C (111.0 F) |
| 1954 | 43.9 C (111.0 F) |
| 1955 | 45.0 C (113.0 F) |
| 1956 | 44.4 C (111.9 F) |
| 1957 | 45.6 C (114.1 F) |
| 1958 | 46.1 C (115.0 F) |
| 1959 | 44.4 C (111.9 F) |
| 1960 | 46.1 C (115.0 F) |
| 1961 | 44.4 C (111.9 F) |
| 1962 | 45.0 C (113.0 F) |
| 1963 | 43.9 C (111.0 F) |
| 1964 | 43.9 C (111.0 F) |
| 1965 | 44.4 C (111.9 F) |
| 1966 | 43.9 C (111.0 F) |
| 1967 | 42.8 C (109.0 F) |
| 1968 | 46.1 C (115.0 F) |
| 1969 | 46.1 C (115.0 F) |
| 1970 | 46.1 C (115.0 F) |
| 1971 | 45.0 C (113.0 F) |
| 1972 | 46.1 C (115.0 F) |
| 1973 | 44.4 C (111.9 F) |
| 1974 | 44.4 C (111.9 F) |
| 1975 | 43.9 C (111.0 F) |
| 1976 | 43.9 C (111.0 F) |
| 1977 | 43.3 C (109.9 F) |
| 1978 | 44.4 C (111.9 F) |
| 1979 | 45.0 C (113.0 F) |
| 1980 | 43.9 C (111.0 F) |
| 1981 | 43.3 C (109.9 F) |
| 1982 | 42.2 C (108.0 F) |
| 1983 | 45.0 C (113.0 F) |
| 1984 | 42.8 C (109.0 F) |
| 1985 | 45.0 C (113.0 F) |
| 1986 | 43.9 C (111.0 F) |
| 1987 | 43.9 C (111.0 F) |
| 1988 | 43.3 C (109.9 F) |
| 1989 | 45.0 C (113.0 F) |
| 1990 | 46.1 C (115.0 F) |
| 1991 | 42.2 C (108.0 F) |
| 1992 | 43.3 C (109.9 F) |
| 1993 | 44.4 C (111.9 F) |
| 1994 | 45.0 C (113.0 F) |
| 1995 | 47.2 C (117.0 F) |
| 1996 | 44.4 C (111.9 F) |
| 1997 | 43.9 C (111.0 F) |
| 1998 | 45.6 C (114.1 F) |
| 1999 | 43.3 C (109.9 F) |
| 2000 | 43.9 C (111.0 F) |
| 2001 | 46.1 C (115.0 F) |
| 2002 | 43.9 C (111.0 F) |
| 2003 | 45.6 C (114.1 F) |
| 2004 | 43.3 C (109.9 F) |
| 2005 | 45.0 C (113.0 F) |
| 2006 | 43.3 C (109.9 F) |
| 2007 | 47.2 C (117.0 F) |
| 2008 | 43.9 C (111.0 F) |
| 2009 | 44.4 C (111.9 F) |
| 2010 | 45.0 C (113.0 F) |
| 2011 | 46.1 C (115.0 F) |
| 2012 | 45.0 C (113.0 F) |
| 2013 | 45.6 C (114.1 F) |
| 2014 | 45.0 C (113.0 F) |
| 2015 | 45.0 C (113.0 F) |
| 2016 | 48.3 C (118.9 F) |
| 2017 | 47.8 C (118.0 F) |
| 2018 | 46.7 C (116.1 F) |
| 2019 | 46.7 C (116.1 F) |
| 2020 | 46.1 C (115.0 F) |
| 2021 | 48.3 C (118.9 F) |
| 2022 | 46.1 C (115.0 F) |
| 2023 | 47.8 C (118.0 F) |
| 2024 | 47.8 C (118.0 F) |
| 2025 | 48.9 C (120.0 F) |
| 2026 | 47.2 C (117.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1914 | n/a |
| 1915 | -2.2 C (28.0 F) |
| 1916 | -3.3 C (26.1 F) |
| 1917 | 0.0 C (32.0 F) |
| 1918 | -0.6 C (30.9 F) |
| 1919 | -4.4 C (24.1 F) |
| 1920 | -3.3 C (26.1 F) |
| 1921 | -5.6 C (21.9 F) |
| 1922 | -3.3 C (26.1 F) |
| 1923 | -5.6 C (21.9 F) |
| 1924 | -1.1 C (30.0 F) |
| 1925 | -1.1 C (30.0 F) |
| 1926 | -1.1 C (30.0 F) |
| 1927 | 1.7 C (35.1 F) |
| 1928 | -0.6 C (30.9 F) |
| 1929 | -1.7 C (28.9 F) |
| 1930 | 0.6 C (33.1 F) |
| 1931 | -1.1 C (30.0 F) |
| 1932 | -2.2 C (28.0 F) |
| 1933 | -0.6 C (30.9 F) |
| 1934 | 1.7 C (35.1 F) |
| 1935 | -2.2 C (28.0 F) |
| 1936 | 1.7 C (35.1 F) |
| 1937 | -8.3 C (17.1 F) |
| 1938 | 0.0 C (32.0 F) |
| 1939 | -0.6 C (30.9 F) |
| 1940 | -1.1 C (30.0 F) |
| 1941 | 1.1 C (34.0 F) |
| 1942 | 0.0 C (32.0 F) |
| 1943 | -0.6 C (30.9 F) |
| 1944 | 0.0 C (32.0 F) |
| 1945 | -3.3 C (26.1 F) |
| 1946 | 0.0 C (32.0 F) |
| 1947 | -0.6 C (30.9 F) |
| 1948 | -3.3 C (26.1 F) |
| 1949 | -6.7 C (19.9 F) |
| 1950 | -4.4 C (24.1 F) |
| 1951 | -1.7 C (28.9 F) |
| 1952 | -2.2 C (28.0 F) |
| 1953 | -2.2 C (28.0 F) |
| 1954 | -5.6 C (21.9 F) |
| 1955 | -2.8 C (27.0 F) |
| 1956 | -5.6 C (21.9 F) |
| 1957 | 1.7 C (35.1 F) |
| 1958 | -0.6 C (30.9 F) |
| 1959 | 0.6 C (33.1 F) |
| 1960 | -3.9 C (25.0 F) |
| 1961 | -1.1 C (30.0 F) |
| 1962 | -3.9 C (25.0 F) |
| 1963 | -7.8 C (18.0 F) |
| 1964 | -2.8 C (27.0 F) |
| 1965 | -3.3 C (26.1 F) |
| 1966 | -2.2 C (28.0 F) |
| 1967 | -1.1 C (30.0 F) |
| 1968 | -5.0 C (23.0 F) |
| 1969 | -2.2 C (28.0 F) |
| 1970 | -2.8 C (27.0 F) |
| 1971 | -5.6 C (21.9 F) |
| 1972 | -3.3 C (26.1 F) |
| 1973 | 0.0 C (32.0 F) |
| 1974 | -1.1 C (30.0 F) |
| 1975 | 0.6 C (33.1 F) |
| 1976 | -1.7 C (28.9 F) |
| 1977 | 2.2 C (36.0 F) |
| 1978 | -2.8 C (27.0 F) |
| 1979 | 0.0 C (32.0 F) |
| 1980 | 4.4 C (39.9 F) |
| 1981 | 3.9 C (39.0 F) |
| 1982 | 2.2 C (36.0 F) |
| 1983 | 2.2 C (36.0 F) |
| 1984 | 1.7 C (35.1 F) |
| 1985 | -2.8 C (27.0 F) |
| 1986 | 0.0 C (32.0 F) |
| 1987 | -2.2 C (28.0 F) |
| 1988 | -0.6 C (30.9 F) |
| 1989 | -2.2 C (28.0 F) |
| 1990 | -4.4 C (24.1 F) |
| 1991 | 1.1 C (34.0 F) |
| 1992 | 2.2 C (36.0 F) |
| 1993 | 1.7 C (35.1 F) |
| 1994 | 1.7 C (35.1 F) |
| 1995 | 2.2 C (36.0 F) |
| 1996 | 1.1 C (34.0 F) |
| 1997 | 0.0 C (32.0 F) |
| 1998 | -0.6 C (30.9 F) |
| 1999 | 1.7 C (35.1 F) |
| 2000 | 2.2 C (36.0 F) |
| 2001 | 0.6 C (33.1 F) |
| 2002 | -1.1 C (30.0 F) |
| 2003 | 0.0 C (32.0 F) |
| 2004 | 2.2 C (36.0 F) |
| 2005 | 3.3 C (37.9 F) |
| 2006 | -0.6 C (30.9 F) |
| 2007 | -2.2 C (28.0 F) |
| 2008 | -0.6 C (30.9 F) |
| 2009 | 2.2 C (36.0 F) |
| 2010 | 0.0 C (32.0 F) |
| 2011 | -5.0 C (23.0 F) |
| 2012 | 0.0 C (32.0 F) |
| 2013 | -5.6 C (21.9 F) |
| 2014 | 0.6 C (33.1 F) |
| 2015 | -2.8 C (27.0 F) |
| 2016 | -0.6 C (30.9 F) |
| 2017 | 0.6 C (33.1 F) |
| 2018 | -2.2 C (28.0 F) |
| 2019 | -2.8 C (27.0 F) |
| 2020 | -1.7 C (28.9 F) |
| 2021 | 0.0 C (32.0 F) |
| 2022 | -1.7 C (28.9 F) |
| 2023 | -1.1 C (30.0 F) |
| 2024 | -0.6 C (30.9 F) |
| 2025 | 1.1 C (34.0 F) |
| 2026 | 1.7 C (35.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1914 | 35.1 mm (1.4 in) |
| 1915 | 37.1 mm (1.5 in) |
| 1916 | 29.7 mm (1.2 in) |
| 1917 | 28.7 mm (1.1 in) |
| 1918 | 34.0 mm (1.3 in) |
| 1919 | 32.0 mm (1.3 in) |
| 1920 | 42.2 mm (1.7 in) |
| 1921 | 63.0 mm (2.5 in) |
| 1922 | 32.8 mm (1.3 in) |
| 1923 | 80.5 mm (3.2 in) |
| 1924 | 13.2 mm (0.5 in) |
| 1925 | 24.1 mm (0.9 in) |
| 1926 | 15.2 mm (0.6 in) |
| 1927 | 37.1 mm (1.5 in) |
| 1928 | 31.2 mm (1.2 in) |
| 1929 | 30.5 mm (1.2 in) |
| 1930 | 35.6 mm (1.4 in) |
| 1931 | 30.7 mm (1.2 in) |
| 1932 | 58.4 mm (2.3 in) |
| 1933 | 32.5 mm (1.3 in) |
| 1934 | 15.7 mm (0.6 in) |
| 1935 | 29.2 mm (1.1 in) |
| 1936 | 17.8 mm (0.7 in) |
| 1937 | 33.8 mm (1.3 in) |
| 1938 | 35.6 mm (1.4 in) |
| 1939 | 30.0 mm (1.2 in) |
| 1940 | 48.0 mm (1.9 in) |
| 1941 | 38.9 mm (1.5 in) |
| 1942 | 38.6 mm (1.5 in) |
| 1943 | 51.3 mm (2.0 in) |
| 1944 | 46.2 mm (1.8 in) |
| 1945 | 22.6 mm (0.9 in) |
| 1946 | 105.4 mm (4.1 in) |
| 1947 | 49.0 mm (1.9 in) |
| 1948 | 31.0 mm (1.2 in) |
| 1949 | 36.6 mm (1.4 in) |
| 1950 | 20.8 mm (0.8 in) |
| 1951 | 96.5 mm (3.8 in) |
| 1952 | 25.7 mm (1.0 in) |
| 1953 | 31.8 mm (1.3 in) |
| 1954 | 37.1 mm (1.5 in) |
| 1955 | 25.9 mm (1.0 in) |
| 1956 | 42.4 mm (1.7 in) |
| 1957 | 21.8 mm (0.9 in) |
| 1958 | 25.4 mm (1.0 in) |
| 1959 | 39.1 mm (1.5 in) |
| 1960 | 82.6 mm (3.3 in) |
| 1961 | 50.8 mm (2.0 in) |
| 1962 | 20.6 mm (0.8 in) |
| 1963 | 38.6 mm (1.5 in) |
| 1964 | 26.2 mm (1.0 in) |
| 1965 | 46.0 mm (1.8 in) |
| 1966 | 27.2 mm (1.1 in) |
| 1967 | 34.5 mm (1.4 in) |
| 1968 | 48.8 mm (1.9 in) |
| 1969 | 32.5 mm (1.3 in) |
| 1970 | 46.2 mm (1.8 in) |
| 1971 | 34.8 mm (1.4 in) |
| 1972 | 45.0 mm (1.8 in) |
| 1973 | 23.4 mm (0.9 in) |
| 1974 | 26.2 mm (1.0 in) |
| 1975 | 19.1 mm (0.8 in) |
| 1976 | 40.9 mm (1.6 in) |
| 1977 | 47.5 mm (1.9 in) |
| 1978 | 32.5 mm (1.3 in) |
| 1979 | 46.5 mm (1.8 in) |
| 1980 | 19.1 mm (0.8 in) |
| 1981 | 26.4 mm (1.0 in) |
| 1982 | 33.5 mm (1.3 in) |
| 1983 | 42.7 mm (1.7 in) |
| 1984 | 45.2 mm (1.8 in) |
| 1985 | 22.1 mm (0.9 in) |
| 1986 | 14.5 mm (0.6 in) |
| 1987 | 25.4 mm (1.0 in) |
| 1988 | 22.9 mm (0.9 in) |
| 1989 | 35.1 mm (1.4 in) |
| 1990 | 34.8 mm (1.4 in) |
| 1991 | 27.7 mm (1.1 in) |
| 1992 | 24.6 mm (1.0 in) |
| 1993 | 23.9 mm (0.9 in) |
| 1994 | 31.8 mm (1.3 in) |
| 1995 | 0.0 mm (0.00 in) |
| 1996 | 31.2 mm (1.2 in) |
| 1997 | 9.1 mm (0.36 in) |
| 1998 | 31.5 mm (1.2 in) |
| 1999 | 40.4 mm (1.6 in) |
| 2000 | 26.2 mm (1.0 in) |
| 2001 | 28.2 mm (1.1 in) |
| 2002 | 27.2 mm (1.1 in) |
| 2003 | 45.5 mm (1.8 in) |
| 2004 | 34.0 mm (1.3 in) |
| 2005 | 11.7 mm (0.5 in) |
| 2006 | 22.9 mm (0.9 in) |
| 2007 | 62.2 mm (2.4 in) |
| 2008 | 31.5 mm (1.2 in) |
| 2009 | 10.4 mm (0.4 in) |
| 2010 | 52.1 mm (2.1 in) |
| 2011 | 37.3 mm (1.5 in) |
| 2012 | 90.2 mm (3.6 in) |
| 2013 | 35.6 mm (1.4 in) |
| 2014 | 42.9 mm (1.7 in) |
| 2015 | 26.4 mm (1.0 in) |
| 2016 | 25.4 mm (1.0 in) |
| 2017 | 41.1 mm (1.6 in) |
| 2018 | 76.2 mm (3.0 in) |
| 2019 | 69.9 mm (2.8 in) |
| 2020 | 25.4 mm (1.0 in) |
| 2021 | 21.6 mm (0.9 in) |
| 2022 | 26.7 mm (1.1 in) |
| 2023 | 35.6 mm (1.4 in) |
| 2024 | 49.8 mm (2.0 in) |
| 2025 | 15.5 mm (0.6 in) |
| 2026 | 20.3 mm (0.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1914 | 58.0 mm (2.3 in) |
| 1915 | 51.6 mm (2.0 in) |
| 1916 | 56.4 mm (2.2 in) |
| 1917 | 53.4 mm (2.1 in) |
| 1918 | 87.0 mm (3.4 in) |
| 1919 | 33.5 mm (1.3 in) |
| 1920 | 42.2 mm (1.7 in) |
| 1921 | 66.8 mm (2.6 in) |
| 1922 | 34.0 mm (1.3 in) |
| 1923 | 82.1 mm (3.2 in) |
| 1924 | 18.8 mm (0.7 in) |
| 1925 | 27.4 mm (1.1 in) |
| 1926 | 39.3 mm (1.5 in) |
| 1927 | 53.9 mm (2.1 in) |
| 1928 | 31.2 mm (1.2 in) |
| 1929 | 30.5 mm (1.2 in) |
| 1930 | 71.5 mm (2.8 in) |
| 1931 | 71.6 mm (2.8 in) |
| 1932 | 65.3 mm (2.6 in) |
| 1933 | 50.8 mm (2.0 in) |
| 1934 | 22.3 mm (0.9 in) |
| 1935 | 36.7 mm (1.4 in) |
| 1936 | 33.6 mm (1.3 in) |
| 1937 | 38.4 mm (1.5 in) |
| 1938 | 37.1 mm (1.5 in) |
| 1939 | 40.3 mm (1.6 in) |
| 1940 | 60.4 mm (2.4 in) |
| 1941 | 51.9 mm (2.0 in) |
| 1942 | 54.1 mm (2.1 in) |
| 1943 | 107.4 mm (4.2 in) |
| 1944 | 52.3 mm (2.1 in) |
| 1945 | 56.4 mm (2.2 in) |
| 1946 | 126.0 mm (5.0 in) |
| 1947 | 103.1 mm (4.1 in) |
| 1948 | 52.1 mm (2.1 in) |
| 1949 | 57.2 mm (2.3 in) |
| 1950 | 40.9 mm (1.6 in) |
| 1951 | 145.0 mm (5.7 in) |
| 1952 | 43.4 mm (1.7 in) |
| 1953 | 46.3 mm (1.8 in) |
| 1954 | 51.8 mm (2.0 in) |
| 1955 | 45.5 mm (1.8 in) |
| 1956 | 56.9 mm (2.2 in) |
| 1957 | 31.7 mm (1.2 in) |
| 1958 | 42.7 mm (1.7 in) |
| 1959 | 47.6 mm (1.9 in) |
| 1960 | 88.2 mm (3.5 in) |
| 1961 | 64.3 mm (2.5 in) |
| 1962 | 30.2 mm (1.2 in) |
| 1963 | 40.9 mm (1.6 in) |
| 1964 | 29.9 mm (1.2 in) |
| 1965 | 56.6 mm (2.2 in) |
| 1966 | 47.3 mm (1.9 in) |
| 1967 | 58.6 mm (2.3 in) |
| 1968 | 60.0 mm (2.4 in) |
| 1969 | 53.1 mm (2.1 in) |
| 1970 | 46.2 mm (1.8 in) |
| 1971 | 35.8 mm (1.4 in) |
| 1972 | 48.6 mm (1.9 in) |
| 1973 | 27.2 mm (1.1 in) |
| 1974 | 37.6 mm (1.5 in) |
| 1975 | 28.7 mm (1.1 in) |
| 1976 | 53.4 mm (2.1 in) |
| 1977 | 56.2 mm (2.2 in) |
| 1978 | 49.0 mm (1.9 in) |
| 1979 | 50.1 mm (2.0 in) |
| 1980 | 32.8 mm (1.3 in) |
| 1981 | 36.5 mm (1.4 in) |
| 1982 | 39.4 mm (1.6 in) |
| 1983 | 66.3 mm (2.6 in) |
| 1984 | 52.7 mm (2.1 in) |
| 1985 | 24.4 mm (1.0 in) |
| 1986 | 14.5 mm (0.6 in) |
| 1987 | 54.6 mm (2.1 in) |
| 1988 | 25.7 mm (1.0 in) |
| 1989 | 35.9 mm (1.4 in) |
| 1990 | 65.8 mm (2.6 in) |
| 1991 | 27.7 mm (1.1 in) |
| 1992 | 24.6 mm (1.0 in) |
| 1993 | 16.0 mm (0.6 in) |
| 1994 | 41.4 mm (1.6 in) |
| 1995 | 0.0 mm (0.00 in) |
| 1996 | 33.7 mm (1.3 in) |
| 1997 | 15.2 mm (0.6 in) |
| 1998 | 36.3 mm (1.4 in) |
| 1999 | 40.4 mm (1.6 in) |
| 2000 | 38.4 mm (1.5 in) |
| 2001 | 44.4 mm (1.7 in) |
| 2002 | 27.2 mm (1.1 in) |
| 2003 | 57.6 mm (2.3 in) |
| 2004 | 36.5 mm (1.4 in) |
| 2005 | 13.0 mm (0.5 in) |
| 2006 | 30.0 mm (1.2 in) |
| 2007 | 12.7 mm (0.5 in) |
| 2008 | 25.9 mm (1.0 in) |
| 2009 | 15.3 mm (0.6 in) |
| 2010 | 76.5 mm (3.0 in) |
| 2011 | 37.3 mm (1.5 in) |
| 2012 | 132.3 mm (5.2 in) |
| 2013 | 63.5 mm (2.5 in) |
| 2014 | 77.7 mm (3.1 in) |
| 2015 | 27.7 mm (1.1 in) |
| 2016 | 31.3 mm (1.2 in) |
| 2017 | 41.1 mm (1.6 in) |
| 2018 | 127.8 mm (5.0 in) |
| 2019 | 89.0 mm (3.5 in) |
| 2020 | 54.6 mm (2.1 in) |
| 2021 | 36.8 mm (1.4 in) |
| 2022 | 60.8 mm (2.4 in) |
| 2023 | 36.4 mm (1.4 in) |
| 2024 | 71.6 mm (2.8 in) |
| 2025 | 26.4 mm (1.0 in) |
| 2026 | 26.9 mm (1.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1914 | 50 days |
| 1915 | 80 days |
| 1916 | 59 days |
| 1917 | 80 days |
| 1918 | 61 days |
| 1919 | 38 days |
| 1920 | 62 days |
| 1921 | 66 days |
| 1922 | 81 days |
| 1923 | 79 days |
| 1924 | 77 days |
| 1925 | 111 days |
| 1926 | 59 days |
| 1927 | 56 days |
| 1928 | 132 days |
| 1929 | 97 days |
| 1930 | 62 days |
| 1931 | 60 days |
| 1932 | 56 days |
| 1933 | 51 days |
| 1934 | 93 days |
| 1935 | 100 days |
| 1936 | 94 days |
| 1937 | 102 days |
| 1938 | 87 days |
| 1939 | 80 days |
| 1940 | 104 days |
| 1941 | 78 days |
| 1942 | 71 days |
| 1943 | 81 days |
| 1944 | 70 days |
| 1945 | 124 days |
| 1946 | 78 days |
| 1947 | 59 days |
| 1948 | 126 days |
| 1949 | 93 days |
| 1950 | 101 days |
| 1951 | 79 days |
| 1952 | 47 days |
| 1953 | 63 days |
| 1954 | 89 days |
| 1955 | 173 days |
| 1956 | 98 days |
| 1957 | 84 days |
| 1958 | 73 days |
| 1959 | 128 days |
| 1960 | 70 days |
| 1961 | 80 days |
| 1962 | 99 days |
| 1963 | 100 days |
| 1964 | 110 days |
| 1965 | 62 days |
| 1966 | 63 days |
| 1967 | 64 days |
| 1968 | 83 days |
| 1969 | 71 days |
| 1970 | 56 days |
| 1971 | 146 days |
| 1972 | 151 days |
| 1973 | 90 days |
| 1974 | 118 days |
| 1975 | 106 days |
| 1976 | 68 days |
| 1977 | 79 days |
| 1978 | 95 days |
| 1979 | 54 days |
| 1980 | 140 days |
| 1981 | 70 days |
| 1982 | 62 days |
| 1983 | 92 days |
| 1984 | 90 days |
| 1985 | 71 days |
| 1986 | 123 days |
| 1987 | 52 days |
| 1988 | 67 days |
| 1989 | 102 days |
| 1990 | 53 days |
| 1991 | 92 days |
| 1992 | 67 days |
| 1993 | 65 days |
| 1994 | 54 days |
| 1995 | 165 days |
| 1996 | 182 days |
| 1997 | 105 days |
| 1998 | 64 days |
| 1999 | 99 days |
| 2000 | 105 days |
| 2001 | 44 days |
| 2002 | 123 days |
| 2003 | 79 days |
| 2004 | 98 days |
| 2005 | 84 days |
| 2006 | 113 days |
| 2007 | 40 days |
| 2008 | 32 days |
| 2009 | 59 days |
| 2010 | 89 days |
| 2011 | 84 days |
| 2012 | 107 days |
| 2013 | 121 days |
| 2014 | 123 days |
| 2015 | 51 days |
| 2016 | 53 days |
| 2017 | 99 days |
| 2018 | 107 days |
| 2019 | 61 days |
| 2020 | 123 days |
| 2021 | 102 days |
| 2022 | 85 days |
| 2023 | 144 days |
| 2024 | 81 days |
| 2025 | 82 days |
| 2026 | 124 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
31 years with a frostAcross 31 years with a frost, the median last spring frost at Ajo falls on 2 February and the median first autumn frost on 13 December, which leaves a median of 322 days between them.
Fitted over all years, the growing season changes by -1.9 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1916 to 2022) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 2 February | n/a | 3 February | n/a | +1.4 days per decade |
| First autumn frost | 13 December | n/a | 13 December | n/a | -0.5 days per decade |
| Growing days | 322 days | n/a | 318 days | n/a | -1.9 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
105 years, 1915 to 2025A day with at least 32.5 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 94.8 mm (3.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 32.5 mm (1.3 in) | |
| 5 years | 46.9 mm (1.8 in) | |
| 10 years | 57.3 mm (2.3 in) | |
| 25 years | 71.5 mm (2.8 in) | |
| 50 years | 82.8 mm (3.3 in) | |
| 100 years | 94.8 mm (3.7 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 105 years of values from 1915 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: 105.4 mm (4.1 in) in 1946; 96.5 mm (3.8 in) in 1951; 90.2 mm (3.6 in) in 2012.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Ajo, at 1985. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1985 ran 0.5 C (1.0 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1985 | -0.5 | -1.0 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Ajo had a mean temperature of 23.5 C (74.2 F) and 216.3 mm (8.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Phoenix City (United States, 140 km away), Yuma WSO AP (United States, 166 km away) and Gold Rock Rch (United States, 196 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Phoenix City | United States | 140 km (87 mi) | 23.1 C (73.7 F) | 195.5 mm (7.7 in) | 0.56 |
| Gold Rock Rch | United States | 196 km (122 mi) | 23.4 C (74.0 F) | 96.3 mm (3.8 in) | 0.74 |
| Yuma WSO AP | United States | 166 km (103 mi) | 23.4 C (74.1 F) | 80.7 mm (3.2 in) | 0.74 |
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).