Tucson Intl AP Weather Records (USW00023160)
Record envelope, standing records and threshold days for Tucson Intl AP (USW00023160), Arizona, United States, with 81 years of record.
Key Facts for Tucson Intl AP
- Tucson Intl AP (USW00023160) is a weather station in Arizona, United States at 32.13 latitude and -110.96 longitude, 778 m (2,551 ft) above sea level.
- The station reports from 1946 to 2026, 81 years of record.
- 1,464 records set at Tucson Intl AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Tucson Intl AP set a daily record high minimum temperature of 25.6 C (78.1 F) on 9 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, 32.13 latitude, -110.96 longitude.
- Elevation: 778 m (2,551 ft).
- Period of record: 1946 to 2026, 81 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
16 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 30.6 C (87.1 F) | -8.9 C (16.0 F) | 23.9 C (75.0 F) | 1.1 C (34.0 F) |
| Feb | 33.3 C (91.9 F) | -7.8 C (18.0 F) | 31.7 C (89.1 F) | 2.2 C (36.0 F) |
| Mar | 38.9 C (102.0 F) | -6.7 C (19.9 F) | 38.9 C (102.0 F) | 4.4 C (39.9 F) |
| Apr | 40.0 C (104.0 F) | 0.0 C (32.0 F) | 33.3 C (91.9 F) | 8.9 C (48.0 F) |
| May | 42.8 C (109.0 F) | 3.3 C (37.9 F) | 39.4 C (102.9 F) | 11.1 C (52.0 F) |
| Jun | 47.2 C (117.0 F) | 8.3 C (46.9 F) | 41.1 C (106.0 F) | 19.4 C (66.9 F) |
| Jul | 45.6 C (114.1 F) | 15.0 C (59.0 F) | 42.8 C (109.0 F) | 20.0 C (68.0 F) |
| Aug | 44.4 C (111.9 F) | 16.1 C (61.0 F) | 43.3 C (109.9 F) | 20.0 C (68.0 F) |
| Sep | 43.9 C (111.0 F) | 6.7 C (44.1 F) | 38.3 C (100.9 F) | 16.7 C (62.1 F) |
| Oct | 41.1 C (106.0 F) | -3.3 C (26.1 F) | 36.7 C (98.1 F) | 13.3 C (55.9 F) |
| Nov | 34.4 C (93.9 F) | -5.0 C (23.0 F) | n/a | n/a |
| Dec | 29.4 C (84.9 F) | -8.9 C (16.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1946 | 11 |
| 1948 | 31 |
| 1949 | 35 |
| 1950 | 27 |
| 1951 | 17 |
| 1952 | 17 |
| 1953 | 16 |
| 1954 | 15 |
| 1955 | 31 |
| 1956 | 21 |
| 1957 | 19 |
| 1958 | 19 |
| 1959 | 13 |
| 1960 | 18 |
| 1961 | 13 |
| 1962 | 27 |
| 1963 | 16 |
| 1964 | 21 |
| 1965 | 33 |
| 1966 | 16 |
| 1967 | 18 |
| 1968 | 12 |
| 1969 | 13 |
| 1970 | 15 |
| 1971 | 24 |
| 1972 | 16 |
| 1973 | 19 |
| 1974 | 12 |
| 1975 | 21 |
| 1976 | 16 |
| 1977 | 7 |
| 1978 | 13 |
| 1979 | 22 |
| 1980 | 14 |
| 1981 | 8 |
| 1982 | 11 |
| 1983 | 12 |
| 1984 | 9 |
| 1985 | 13 |
| 1986 | 13 |
| 1987 | 28 |
| 1988 | 13 |
| 1989 | 29 |
| 1990 | 19 |
| 1991 | 13 |
| 1992 | 15 |
| 1993 | 11 |
| 1994 | 16 |
| 1995 | 13 |
| 1996 | 17 |
| 1997 | 11 |
| 1998 | 11 |
| 1999 | 21 |
| 2000 | 26 |
| 2001 | 9 |
| 2002 | 8 |
| 2003 | 11 |
| 2004 | 11 |
| 2005 | 17 |
| 2006 | 12 |
| 2007 | 17 |
| 2008 | 12 |
| 2009 | 21 |
| 2010 | 16 |
| 2011 | 20 |
| 2012 | 12 |
| 2013 | 15 |
| 2014 | 13 |
| 2015 | 16 |
| 2016 | 24 |
| 2017 | 38 |
| 2018 | 15 |
| 2019 | 7 |
| 2020 | 44 |
| 2021 | 22 |
| 2022 | 12 |
| 2023 | 39 |
| 2024 | 43 |
| 2025 | 32 |
| 2026 | 31 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1978-07-19 | Record high minimum temperature | Record high minimum temperature 30.0 C (86.0 F) |
| 1988-06-21 | Record high maximum temperature | Record high maximum temperature 44.4 C (111.9 F) |
| 1988-06-22 | Record high maximum temperature | Record high maximum temperature 45.6 C (114.1 F) |
| 1990-06-26 | Record high maximum temperature | Record high maximum temperature 47.2 C (117.0 F) |
| 2006-07-22 | Record high minimum temperature | Record high minimum temperature 31.7 C (89.1 F) |
Wettest Day of Each Month
Jul: 99.8 mm (3.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 35.3 mm (1.4 in) | 30 January 2015 |
| Feb | 32.0 mm (1.3 in) | 7 February 1966 |
| Mar | 30.2 mm (1.2 in) | 9 March 1952 |
| Apr | 29.7 mm (1.2 in) | 1 April 1999 |
| May | 27.9 mm (1.1 in) | 11 May 2019 |
| Jun | 32.3 mm (1.3 in) | 24 June 1954 |
| Jul | 99.8 mm (3.9 in) | 29 July 1958 |
| Aug | 63.0 mm (2.5 in) | 22 August 1961 |
| Sep | 72.4 mm (2.9 in) | 10 September 1964 |
| Oct | 75.2 mm (3.0 in) | 1 October 1983 |
| Nov | 39.9 mm (1.6 in) | 14 November 1968 |
| Dec | 53.3 mm (2.1 in) | 5 December 1994 |
Period of Record Coverage
1946 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1946 | 183 | 50% | No |
| 1948 | 358 | 98% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | 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 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | 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 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | 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 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 287 | 79% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 9 October 2026 | Tucson Intl AP, US | daily high min (Provisional) | 25.6 C (78.1 F) | 1.7 C (3.1 F) | 0 years | 12 of 100 (Routine) |
| 16 September 2026 | Tucson Intl AP, US | daily rain (Provisional) | 9.4 mm (0.37 in) | 1.0 mm (0.04 in) | 19 years | 13 of 100 (Routine) |
| 28 August 2026 | Tucson Intl AP, US | daily high min (Provisional) | 28.3 C (82.9 F) | 1.6 C (2.9 F) | 3 years | 15 of 100 (Routine) |
| 26 August 2026 | Tucson Intl AP, US | daily high max (Tie, Provisional) | 42.2 C (108.0 F) | tie | 15 years | 3 of 100 (Routine) |
| 25 August 2026 | Tucson Intl AP, US | daily high max (Tie, Provisional) | 41.7 C (107.1 F) | tie | 5 years | 2 of 100 (Routine) |
| 23 August 2026 | Tucson Intl AP, US | daily high min (Provisional) | 27.8 C (82.0 F) | 0.6 C (1.1 F) | 19 years | 15 of 100 (Routine) |
| 22 August 2026 | Tucson Intl AP, US | daily high max (Provisional) | 41.1 C (106.0 F) | 0.5 C (0.9 F) | 40 years | 21 of 100 (Routine) |
| 2 August 2026 | Tucson Intl AP, US | monthly high min | 30.0 C (86.0 F) | 0.6 C (1.1 F) | 2 years | 20 of 100 (Routine) |
| 1 August 2026 | Tucson Intl AP, US | monthly high min (Tie) | 29.4 C (84.9 F) | tie | 2 years | 4 of 100 (Routine) |
| 31 July 2026 | Tucson Intl AP, US | daily high min | 28.3 C (82.9 F) | 0.5 C (0.9 F) | 12 years | 13 of 100 (Routine) |
| 30 July 2026 | Tucson Intl AP, US | daily high min | 28.9 C (84.0 F) | 1.7 C (3.1 F) | 0 years | 15 of 100 (Routine) |
| 27 July 2026 | Tucson Intl AP, US | daily high min | 28.3 C (82.9 F) | 0.5 C (0.9 F) | 45 years | 23 of 100 (Routine) |
| 24 July 2026 | Tucson Intl AP, US | daily high min | 28.9 C (84.0 F) | 0.6 C (1.1 F) | 8 years | 12 of 100 (Routine) |
| 17 June 2026 | Tucson Intl AP, US | daily rain | 16.5 mm (0.6 in) | 14.2 mm (0.6 in) | 25 years | 20 of 100 (Routine) |
| 15 June 2026 | Tucson Intl AP, US | daily rain | 10.2 mm (0.4 in) | 5.9 mm (0.23 in) | 8 years | 20 of 100 (Routine) |
| 13 June 2026 | Tucson Intl AP, US | daily high min | 27.8 C (82.0 F) | 1.1 C (2.0 F) | 4 years | 12 of 100 (Routine) |
| 12 May 2026 | Tucson Intl AP, US | daily high min | 23.9 C (75.0 F) | 0.6 C (1.1 F) | 0 years | 9 of 100 (Routine) |
| 4 May 2026 | Tucson Intl AP, US | daily rain | 6.6 mm (0.26 in) | 2.5 mm (0.10 in) | 44 years | 20 of 100 (Routine) |
| 3 May 2026 | Tucson Intl AP, US | daily high min | 22.2 C (72.0 F) | 1.1 C (2.0 F) | 33 years | 21 of 100 (Routine) |
| 13 April 2026 | Tucson Intl AP, US | daily high min (Tie) | 17.8 C (64.0 F) | tie | 3 years | 2 of 100 (Routine) |
Climate Trend
78 complete years, 1948 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1948 | 19.9 C | -0.88 C |
| 1949 | 19.6 C | -1.13 C |
| 1950 | 20.8 C | +0.04 C |
| 1951 | 20.2 C | -0.59 C |
| 1952 | 20.1 C | -0.64 C |
| 1953 | 20.3 C | -0.48 C |
| 1954 | 21.4 C | +0.66 C |
| 1955 | 19.7 C | -1.06 C |
| 1956 | 20.4 C | -0.33 C |
| 1957 | 20.5 C | -0.22 C |
| 1958 | 20.5 C | -0.25 C |
| 1959 | 20.1 C | -0.63 C |
| 1960 | 19.4 C | -1.33 C |
| 1961 | 19.5 C | -1.23 C |
| 1962 | 20.1 C | -0.66 C |
| 1963 | 20.3 C | -0.45 C |
| 1964 | 18.9 C | -1.86 C |
| 1965 | 19.5 C | -1.30 C |
| 1966 | 19.7 C | -1.07 C |
| 1967 | 20.1 C | -0.69 C |
| 1968 | 20.1 C | -0.68 C |
| 1969 | 20.0 C | -0.74 C |
| 1970 | 19.6 C | -1.13 C |
| 1971 | 18.9 C | -1.87 C |
| 1972 | 19.6 C | -1.16 C |
| 1973 | 19.1 C | -1.66 C |
| 1974 | 19.6 C | -1.16 C |
| 1975 | 19.1 C | -1.70 C |
| 1976 | 20.1 C | -0.64 C |
| 1977 | 20.8 C | +0.03 C |
| 1978 | 20.6 C | -0.20 C |
| 1979 | 20.1 C | -0.61 C |
| 1980 | 20.8 C | +0.01 C |
| 1981 | 20.9 C | +0.12 C |
| 1982 | 19.5 C | -1.29 C |
| 1983 | 19.9 C | -0.89 C |
| 1984 | 20.0 C | -0.73 C |
| 1985 | 20.4 C | -0.37 C |
| 1986 | 21.3 C | +0.53 C |
| 1987 | 20.7 C | -0.09 C |
| 1988 | 21.4 C | +0.61 C |
| 1989 | 21.9 C | +1.12 C |
| 1990 | 20.9 C | +0.14 C |
| 1991 | 20.6 C | -0.12 C |
| 1992 | 21.0 C | +0.23 C |
| 1993 | 21.2 C | +0.44 C |
| 1994 | 21.6 C | +0.86 C |
| 1995 | 21.3 C | +0.50 C |
| 1996 | 21.4 C | +0.66 C |
| 1997 | 20.9 C | +0.19 C |
| 1998 | 20.0 C | -0.73 C |
| 1999 | 20.9 C | +0.13 C |
| 2000 | 21.1 C | +0.32 C |
| 2001 | 20.9 C | +0.17 C |
| 2002 | 21.1 C | +0.36 C |
| 2003 | 21.5 C | +0.71 C |
| 2004 | 20.7 C | -0.06 C |
| 2005 | 21.5 C | +0.74 C |
| 2006 | 21.2 C | +0.46 C |
| 2007 | 21.3 C | +0.59 C |
| 2008 | 21.1 C | +0.33 C |
| 2009 | 21.7 C | +0.97 C |
| 2010 | 21.1 C | +0.34 C |
| 2011 | 21.0 C | +0.27 C |
| 2012 | 21.8 C | +1.09 C |
| 2013 | 21.6 C | +0.82 C |
| 2014 | 22.3 C | +1.55 C |
| 2015 | 22.0 C | +1.20 C |
| 2016 | 22.3 C | +1.51 C |
| 2017 | 22.9 C | +2.16 C |
| 2018 | 22.1 C | +1.30 C |
| 2019 | 21.2 C | +0.46 C |
| 2020 | 22.5 C | +1.76 C |
| 2021 | 22.2 C | +1.40 C |
| 2022 | 21.8 C | +1.03 C |
| 2023 | 22.2 C | +1.46 C |
| 2024 | 22.4 C | +1.68 C |
| 2025 | 22.7 C | +1.95 C |
The annual mean temperature here has risen by 0.3 C (0.3 to 0.4) per decade over 1948 to 2025. In Fahrenheit: 0.6 F (0.5 to 0.7) per decade. The slope is a straight line fitted to 78 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 (0.3 to 0.4) per decade | 0.6 F (0.5 to 0.7) per decade | 1948 to 2025 | 78 | Rise |
| Mean daily maximum | 0.3 C (0.2 to 0.4) per decade | 0.6 F (0.4 to 0.7) per decade | 1948 to 2025 | 78 | Rise |
| Mean daily minimum | 0.3 C (0.3 to 0.4) per decade | 0.6 F (0.5 to 0.7) per decade | 1948 to 2025 | 78 | 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
1946 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 47.2 C (117.0 F) | 1990 | 43.3 C (109.9 F) | 80 |
| Coldest night (TNn) | -8.9 C (16.0 F) | 1949 | -3.6 C (25.5 F) | 80 |
| Wettest day (Rx1day) | 99.8 mm (3.9 in) | 1958 | 33.0 mm (1.3 in) | 80 |
| Wettest five days (Rx5day) | 162.5 mm (6.4 in) | 1983 | 50.4 mm (2.0 in) | 80 |
| Longest dry spell (CDD) | 149 days | 1972 | 75 days | 80 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1946 | 41.7 C (107.1 F) |
| 1948 | 42.2 C (108.0 F) |
| 1949 | 41.7 C (107.1 F) |
| 1950 | 42.2 C (108.0 F) |
| 1951 | 42.2 C (108.0 F) |
| 1952 | 41.7 C (107.1 F) |
| 1953 | 43.3 C (109.9 F) |
| 1954 | 42.2 C (108.0 F) |
| 1955 | 43.3 C (109.9 F) |
| 1956 | 42.8 C (109.0 F) |
| 1957 | 43.9 C (111.0 F) |
| 1958 | 43.9 C (111.0 F) |
| 1959 | 41.7 C (107.1 F) |
| 1960 | 42.2 C (108.0 F) |
| 1961 | 41.1 C (106.0 F) |
| 1962 | 41.7 C (107.1 F) |
| 1963 | 41.7 C (107.1 F) |
| 1964 | 41.1 C (106.0 F) |
| 1965 | 41.7 C (107.1 F) |
| 1966 | 40.6 C (105.1 F) |
| 1967 | 41.7 C (107.1 F) |
| 1968 | 43.3 C (109.9 F) |
| 1969 | 42.2 C (108.0 F) |
| 1970 | 43.9 C (111.0 F) |
| 1971 | 42.2 C (108.0 F) |
| 1972 | 41.7 C (107.1 F) |
| 1973 | 41.7 C (107.1 F) |
| 1974 | 42.8 C (109.0 F) |
| 1975 | 41.1 C (106.0 F) |
| 1976 | 42.2 C (108.0 F) |
| 1977 | 42.2 C (108.0 F) |
| 1978 | 42.2 C (108.0 F) |
| 1979 | 43.3 C (109.9 F) |
| 1980 | 42.2 C (108.0 F) |
| 1981 | 41.7 C (107.1 F) |
| 1982 | 41.1 C (106.0 F) |
| 1983 | 43.9 C (111.0 F) |
| 1984 | 41.1 C (106.0 F) |
| 1985 | 43.9 C (111.0 F) |
| 1986 | 43.9 C (111.0 F) |
| 1987 | 43.3 C (109.9 F) |
| 1988 | 45.6 C (114.1 F) |
| 1989 | 45.6 C (114.1 F) |
| 1990 | 47.2 C (117.0 F) |
| 1991 | 43.3 C (109.9 F) |
| 1992 | 43.9 C (111.0 F) |
| 1993 | 45.0 C (113.0 F) |
| 1994 | 46.7 C (116.1 F) |
| 1995 | 45.6 C (114.1 F) |
| 1996 | 41.7 C (107.1 F) |
| 1997 | 43.3 C (109.9 F) |
| 1998 | 43.3 C (109.9 F) |
| 1999 | 41.7 C (107.1 F) |
| 2000 | 42.2 C (108.0 F) |
| 2001 | 43.9 C (111.0 F) |
| 2002 | 42.8 C (109.0 F) |
| 2003 | 43.3 C (109.9 F) |
| 2004 | 41.7 C (107.1 F) |
| 2005 | 43.9 C (111.0 F) |
| 2006 | 43.3 C (109.9 F) |
| 2007 | 43.3 C (109.9 F) |
| 2008 | 43.9 C (111.0 F) |
| 2009 | 42.8 C (109.0 F) |
| 2010 | 42.8 C (109.0 F) |
| 2011 | 44.4 C (111.9 F) |
| 2012 | 42.8 C (109.0 F) |
| 2013 | 44.4 C (111.9 F) |
| 2014 | 42.2 C (108.0 F) |
| 2015 | 43.3 C (109.9 F) |
| 2016 | 46.1 C (115.0 F) |
| 2017 | 46.7 C (116.1 F) |
| 2018 | 44.4 C (111.9 F) |
| 2019 | 43.3 C (109.9 F) |
| 2020 | 45.0 C (113.0 F) |
| 2021 | 46.1 C (115.0 F) |
| 2022 | 43.9 C (111.0 F) |
| 2023 | 44.4 C (111.9 F) |
| 2024 | 44.4 C (111.9 F) |
| 2025 | 45.0 C (113.0 F) |
| 2026 | 43.3 C (109.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1946 | -1.1 C (30.0 F) |
| 1948 | -6.7 C (19.9 F) |
| 1949 | -8.9 C (16.0 F) |
| 1950 | -8.3 C (17.1 F) |
| 1951 | -3.3 C (26.1 F) |
| 1952 | -3.9 C (25.0 F) |
| 1953 | -5.0 C (23.0 F) |
| 1954 | -7.8 C (18.0 F) |
| 1955 | -6.7 C (19.9 F) |
| 1956 | -3.9 C (25.0 F) |
| 1957 | -2.8 C (27.0 F) |
| 1958 | -4.4 C (24.1 F) |
| 1959 | -3.3 C (26.1 F) |
| 1960 | -6.7 C (19.9 F) |
| 1961 | 0.0 C (32.0 F) |
| 1962 | -6.1 C (21.0 F) |
| 1963 | -6.1 C (21.0 F) |
| 1964 | -7.8 C (18.0 F) |
| 1965 | -6.7 C (19.9 F) |
| 1966 | -5.0 C (23.0 F) |
| 1967 | -6.7 C (19.9 F) |
| 1968 | -7.2 C (19.0 F) |
| 1969 | -4.4 C (24.1 F) |
| 1970 | -5.0 C (23.0 F) |
| 1971 | -8.3 C (17.1 F) |
| 1972 | -5.0 C (23.0 F) |
| 1973 | -3.3 C (26.1 F) |
| 1974 | -8.9 C (16.0 F) |
| 1975 | -3.9 C (25.0 F) |
| 1976 | -5.0 C (23.0 F) |
| 1977 | -2.2 C (28.0 F) |
| 1978 | -6.7 C (19.9 F) |
| 1979 | -4.4 C (24.1 F) |
| 1980 | -0.6 C (30.9 F) |
| 1981 | -2.8 C (27.0 F) |
| 1982 | -2.8 C (27.0 F) |
| 1983 | -1.1 C (30.0 F) |
| 1984 | -3.3 C (26.1 F) |
| 1985 | -4.4 C (24.1 F) |
| 1986 | -1.7 C (28.9 F) |
| 1987 | -7.2 C (19.0 F) |
| 1988 | -6.7 C (19.9 F) |
| 1989 | -4.4 C (24.1 F) |
| 1990 | -6.1 C (21.0 F) |
| 1991 | -3.3 C (26.1 F) |
| 1992 | -3.3 C (26.1 F) |
| 1993 | -1.1 C (30.0 F) |
| 1994 | -2.8 C (27.0 F) |
| 1995 | -0.6 C (30.9 F) |
| 1996 | -3.3 C (26.1 F) |
| 1997 | -3.3 C (26.1 F) |
| 1998 | -3.3 C (26.1 F) |
| 1999 | -4.4 C (24.1 F) |
| 2000 | -2.8 C (27.0 F) |
| 2001 | -2.8 C (27.0 F) |
| 2002 | -4.4 C (24.1 F) |
| 2003 | -7.2 C (19.0 F) |
| 2004 | -2.8 C (27.0 F) |
| 2005 | -2.2 C (28.0 F) |
| 2006 | -3.3 C (26.1 F) |
| 2007 | -6.7 C (19.9 F) |
| 2008 | -3.3 C (26.1 F) |
| 2009 | -2.8 C (27.0 F) |
| 2010 | -5.0 C (23.0 F) |
| 2011 | -7.8 C (18.0 F) |
| 2012 | -1.7 C (28.9 F) |
| 2013 | -8.3 C (17.1 F) |
| 2014 | -2.1 C (28.2 F) |
| 2015 | -2.7 C (27.1 F) |
| 2016 | -2.1 C (28.2 F) |
| 2017 | -2.1 C (28.2 F) |
| 2018 | -3.2 C (26.2 F) |
| 2019 | -2.7 C (27.1 F) |
| 2020 | -4.3 C (24.3 F) |
| 2021 | -1.0 C (30.2 F) |
| 2022 | -3.2 C (26.2 F) |
| 2023 | -2.7 C (27.1 F) |
| 2024 | -2.1 C (28.2 F) |
| 2025 | -4.3 C (24.3 F) |
| 2026 | 1.1 C (34.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1946 | 33.0 mm (1.3 in) |
| 1948 | 47.5 mm (1.9 in) |
| 1949 | 33.0 mm (1.3 in) |
| 1950 | 31.0 mm (1.2 in) |
| 1951 | 37.3 mm (1.5 in) |
| 1952 | 30.2 mm (1.2 in) |
| 1953 | 21.6 mm (0.9 in) |
| 1954 | 32.5 mm (1.3 in) |
| 1955 | 57.9 mm (2.3 in) |
| 1956 | 27.7 mm (1.1 in) |
| 1957 | 42.2 mm (1.7 in) |
| 1958 | 99.8 mm (3.9 in) |
| 1959 | 35.6 mm (1.4 in) |
| 1960 | 27.4 mm (1.1 in) |
| 1961 | 63.0 mm (2.5 in) |
| 1962 | 61.0 mm (2.4 in) |
| 1963 | 19.6 mm (0.8 in) |
| 1964 | 72.4 mm (2.9 in) |
| 1965 | 24.4 mm (1.0 in) |
| 1966 | 37.6 mm (1.5 in) |
| 1967 | 31.0 mm (1.2 in) |
| 1968 | 39.9 mm (1.6 in) |
| 1969 | 20.6 mm (0.8 in) |
| 1970 | 48.3 mm (1.9 in) |
| 1971 | 25.4 mm (1.0 in) |
| 1972 | 44.5 mm (1.8 in) |
| 1973 | 24.9 mm (1.0 in) |
| 1974 | 37.3 mm (1.5 in) |
| 1975 | 29.7 mm (1.2 in) |
| 1976 | 31.8 mm (1.3 in) |
| 1977 | 37.3 mm (1.5 in) |
| 1978 | 39.4 mm (1.6 in) |
| 1979 | 28.2 mm (1.1 in) |
| 1980 | 27.4 mm (1.1 in) |
| 1981 | 32.3 mm (1.3 in) |
| 1982 | 26.4 mm (1.0 in) |
| 1983 | 75.2 mm (3.0 in) |
| 1984 | 33.3 mm (1.3 in) |
| 1985 | 32.3 mm (1.3 in) |
| 1986 | 26.4 mm (1.0 in) |
| 1987 | 33.0 mm (1.3 in) |
| 1988 | 35.1 mm (1.4 in) |
| 1989 | 27.7 mm (1.1 in) |
| 1990 | 28.4 mm (1.1 in) |
| 1991 | 33.8 mm (1.3 in) |
| 1992 | 49.8 mm (2.0 in) |
| 1993 | 46.0 mm (1.8 in) |
| 1994 | 53.3 mm (2.1 in) |
| 1995 | 54.6 mm (2.1 in) |
| 1996 | 43.7 mm (1.7 in) |
| 1997 | 15.5 mm (0.6 in) |
| 1998 | 25.1 mm (1.0 in) |
| 1999 | 37.6 mm (1.5 in) |
| 2000 | 38.9 mm (1.5 in) |
| 2001 | 17.8 mm (0.7 in) |
| 2002 | 24.4 mm (1.0 in) |
| 2003 | 33.8 mm (1.3 in) |
| 2004 | 18.0 mm (0.7 in) |
| 2005 | 58.2 mm (2.3 in) |
| 2006 | 48.3 mm (1.9 in) |
| 2007 | 37.8 mm (1.5 in) |
| 2008 | 43.9 mm (1.7 in) |
| 2009 | 19.8 mm (0.8 in) |
| 2010 | 30.7 mm (1.2 in) |
| 2011 | 72.1 mm (2.8 in) |
| 2012 | 26.9 mm (1.1 in) |
| 2013 | 30.7 mm (1.2 in) |
| 2014 | 46.7 mm (1.8 in) |
| 2015 | 37.8 mm (1.5 in) |
| 2016 | 31.8 mm (1.3 in) |
| 2017 | 37.6 mm (1.5 in) |
| 2018 | 25.7 mm (1.0 in) |
| 2019 | 27.9 mm (1.1 in) |
| 2020 | 19.8 mm (0.8 in) |
| 2021 | 54.6 mm (2.1 in) |
| 2022 | 26.9 mm (1.1 in) |
| 2023 | 31.8 mm (1.3 in) |
| 2024 | 46.5 mm (1.8 in) |
| 2025 | 30.5 mm (1.2 in) |
| 2026 | 21.3 mm (0.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1946 | 43.2 mm (1.7 in) |
| 1948 | 64.8 mm (2.6 in) |
| 1949 | 48.5 mm (1.9 in) |
| 1950 | 44.7 mm (1.8 in) |
| 1951 | 47.2 mm (1.9 in) |
| 1952 | 35.9 mm (1.4 in) |
| 1953 | 40.1 mm (1.6 in) |
| 1954 | 44.5 mm (1.8 in) |
| 1955 | 106.7 mm (4.2 in) |
| 1956 | 37.9 mm (1.5 in) |
| 1957 | 44.5 mm (1.8 in) |
| 1958 | 104.1 mm (4.1 in) |
| 1959 | 40.4 mm (1.6 in) |
| 1960 | 39.6 mm (1.6 in) |
| 1961 | 71.6 mm (2.8 in) |
| 1962 | 66.4 mm (2.6 in) |
| 1963 | 32.8 mm (1.3 in) |
| 1964 | 96.5 mm (3.8 in) |
| 1965 | 51.1 mm (2.0 in) |
| 1966 | 83.9 mm (3.3 in) |
| 1967 | 69.4 mm (2.7 in) |
| 1968 | 47.3 mm (1.9 in) |
| 1969 | 28.5 mm (1.1 in) |
| 1970 | 64.1 mm (2.5 in) |
| 1971 | 45.7 mm (1.8 in) |
| 1972 | 72.3 mm (2.8 in) |
| 1973 | 34.1 mm (1.3 in) |
| 1974 | 50.1 mm (2.0 in) |
| 1975 | 42.9 mm (1.7 in) |
| 1976 | 34.6 mm (1.4 in) |
| 1977 | 55.1 mm (2.2 in) |
| 1978 | 47.3 mm (1.9 in) |
| 1979 | 43.7 mm (1.7 in) |
| 1980 | 50.8 mm (2.0 in) |
| 1981 | 82.6 mm (3.3 in) |
| 1982 | 68.0 mm (2.7 in) |
| 1983 | 162.5 mm (6.4 in) |
| 1984 | 45.0 mm (1.8 in) |
| 1985 | 55.6 mm (2.2 in) |
| 1986 | 36.3 mm (1.4 in) |
| 1987 | 40.9 mm (1.6 in) |
| 1988 | 52.1 mm (2.1 in) |
| 1989 | 37.4 mm (1.5 in) |
| 1990 | 64.0 mm (2.5 in) |
| 1991 | 38.2 mm (1.5 in) |
| 1992 | 62.0 mm (2.4 in) |
| 1993 | 65.3 mm (2.6 in) |
| 1994 | 64.5 mm (2.5 in) |
| 1995 | 68.8 mm (2.7 in) |
| 1996 | 66.0 mm (2.6 in) |
| 1997 | 24.9 mm (1.0 in) |
| 1998 | 52.5 mm (2.1 in) |
| 1999 | 58.8 mm (2.3 in) |
| 2000 | 62.0 mm (2.4 in) |
| 2001 | 23.9 mm (0.9 in) |
| 2002 | 42.8 mm (1.7 in) |
| 2003 | 43.4 mm (1.7 in) |
| 2004 | 34.3 mm (1.4 in) |
| 2005 | 62.0 mm (2.4 in) |
| 2006 | 97.4 mm (3.8 in) |
| 2007 | 78.2 mm (3.1 in) |
| 2008 | 50.0 mm (2.0 in) |
| 2009 | 27.7 mm (1.1 in) |
| 2010 | 45.0 mm (1.8 in) |
| 2011 | 84.7 mm (3.3 in) |
| 2012 | 64.3 mm (2.5 in) |
| 2013 | 53.3 mm (2.1 in) |
| 2014 | 54.6 mm (2.1 in) |
| 2015 | 56.7 mm (2.2 in) |
| 2016 | 53.3 mm (2.1 in) |
| 2017 | 60.7 mm (2.4 in) |
| 2018 | 43.3 mm (1.7 in) |
| 2019 | 42.5 mm (1.7 in) |
| 2020 | 19.8 mm (0.8 in) |
| 2021 | 127.7 mm (5.0 in) |
| 2022 | 44.9 mm (1.8 in) |
| 2023 | 50.6 mm (2.0 in) |
| 2024 | 60.7 mm (2.4 in) |
| 2025 | 47.7 mm (1.9 in) |
| 2026 | 26.7 mm (1.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1946 | 17 days |
| 1948 | 42 days |
| 1949 | 84 days |
| 1950 | 114 days |
| 1951 | 71 days |
| 1952 | 40 days |
| 1953 | 82 days |
| 1954 | 98 days |
| 1955 | 143 days |
| 1956 | 88 days |
| 1957 | 41 days |
| 1958 | 64 days |
| 1959 | 143 days |
| 1960 | 41 days |
| 1961 | 85 days |
| 1962 | 107 days |
| 1963 | 68 days |
| 1964 | 98 days |
| 1965 | 92 days |
| 1966 | 55 days |
| 1967 | 53 days |
| 1968 | 82 days |
| 1969 | 57 days |
| 1970 | 76 days |
| 1971 | 87 days |
| 1972 | 149 days |
| 1973 | 81 days |
| 1974 | 103 days |
| 1975 | 75 days |
| 1976 | 41 days |
| 1977 | 53 days |
| 1978 | 51 days |
| 1979 | 65 days |
| 1980 | 51 days |
| 1981 | 57 days |
| 1982 | 57 days |
| 1983 | 86 days |
| 1984 | 89 days |
| 1985 | 42 days |
| 1986 | 72 days |
| 1987 | 45 days |
| 1988 | 57 days |
| 1989 | 50 days |
| 1990 | 44 days |
| 1991 | 77 days |
| 1992 | 74 days |
| 1993 | 46 days |
| 1994 | 46 days |
| 1995 | 95 days |
| 1996 | 110 days |
| 1997 | 46 days |
| 1998 | 92 days |
| 1999 | 99 days |
| 2000 | 81 days |
| 2001 | 31 days |
| 2002 | 122 days |
| 2003 | 44 days |
| 2004 | 97 days |
| 2005 | 75 days |
| 2006 | 78 days |
| 2007 | 73 days |
| 2008 | 77 days |
| 2009 | 56 days |
| 2010 | 84 days |
| 2011 | 84 days |
| 2012 | 90 days |
| 2013 | 86 days |
| 2014 | 122 days |
| 2015 | 38 days |
| 2016 | 60 days |
| 2017 | 103 days |
| 2018 | 106 days |
| 2019 | 61 days |
| 2020 | 71 days |
| 2021 | 101 days |
| 2022 | 89 days |
| 2023 | 59 days |
| 2024 | 80 days |
| 2025 | 57 days |
| 2026 | 55 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
71 years with a frostAcross 71 years with a frost, the median last spring frost at Tucson Intl AP falls on 28 February and the median first autumn frost on 29 November, which leaves a median of 283 days between them.
In 1992 to 2022 the median growing season was 292 days. That is 24 days more than in 1948 to 1979.
Fitted over all years, the growing season changes by +5.8 days per decade at this station.
| Measure | Median, all years | Earliest period (1948 to 1979) | Recent period (1992 to 2022) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 February | 7 March | 13 February | 22 days earlier | -4.4 days per decade |
| First autumn frost | 29 November | 28 November | 2 December | 4 days later | +1.4 days per decade |
| Growing days | 283 days | 268 days | 292 days | 24 days more | +5.8 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
78 years, 1948 to 2025A day with at least 33.7 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 91.9 mm (3.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 33.7 mm (1.3 in) | |
| 5 years | 46.1 mm (1.8 in) | |
| 10 years | 55.5 mm (2.2 in) | |
| 25 years | 68.8 mm (2.7 in) | |
| 50 years | 79.8 mm (3.1 in) | |
| 100 years | 91.9 mm (3.6 in) | Longer than the 78 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, 78 years of values from 1948 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: 99.8 mm (3.9 in) in 1958; 75.2 mm (3.0 in) in 1983; 72.4 mm (2.9 in) in 1964.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Tucson Intl AP had a mean temperature of 22.1 C (71.7 F) and 267.2 mm (10.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Ajo (United States, 181 km away), Altar (Obs) (Mexico, 178 km away) and Kofa Mine (United States, 309 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Ajo | United States | 181 km (112 mi) | 22.0 C (71.6 F) | 223.6 mm (8.8 in) | 0.63 |
| Altar (Obs) | Mexico | 178 km (111 mi) | 21.6 C (71.0 F) | 351.2 mm (13.8 in) | 0.80 |
| Kofa Mine | United States | 309 km (192 mi) | 22.6 C (72.6 F) | 161.3 mm (6.4 in) | 0.88 |
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-17).