Tempe Asu Weather Records (USC00028499)
Record envelope, standing records and threshold days for Tempe Asu (USC00028499), Arizona, United States, with 74 years of record.
Key Facts for Tempe Asu
- Tempe Asu (USC00028499) is a weather station in Arizona, United States at 33.43 latitude and -111.92 longitude, 356 m (1,167 ft) above sea level.
- The station reports from 1953 to 2026, 74 years of record.
- 1,464 records set at Tempe Asu still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Tempe Asu set a daily record high minimum temperature of 25.0 C (77.0 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, 33.43 latitude, -111.92 longitude.
- Elevation: 356 m (1,167 ft).
- Period of record: 1953 to 2026, 74 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
24 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) | -7.8 C (18.0 F) | 28.3 C (82.9 F) | 2.2 C (36.0 F) |
| Feb | 34.4 C (93.9 F) | -7.2 C (19.0 F) | 34.4 C (93.9 F) | 5.6 C (42.1 F) |
| Mar | 40.6 C (105.1 F) | -4.4 C (24.1 F) | 40.6 C (105.1 F) | 9.4 C (48.9 F) |
| Apr | 40.6 C (105.1 F) | -1.1 C (30.0 F) | 35.6 C (96.1 F) | 11.7 C (53.1 F) |
| May | 44.4 C (111.9 F) | 1.7 C (35.1 F) | 42.8 C (109.0 F) | 13.3 C (55.9 F) |
| Jun | 48.3 C (118.9 F) | 7.2 C (45.0 F) | 42.8 C (109.0 F) | 18.9 C (66.0 F) |
| Jul | 47.8 C (118.0 F) | 11.7 C (53.1 F) | 45.6 C (114.1 F) | 20.0 C (68.0 F) |
| Aug | 48.3 C (118.9 F) | 11.1 C (52.0 F) | 45.6 C (114.1 F) | 22.2 C (72.0 F) |
| Sep | 46.1 C (115.0 F) | 7.2 C (45.0 F) | 41.1 C (106.0 F) | 22.2 C (72.0 F) |
| Oct | 44.4 C (111.9 F) | -3.3 C (26.1 F) | 39.4 C (102.9 F) | 20.0 C (68.0 F) |
| Nov | 36.7 C (98.1 F) | -5.0 C (23.0 F) | n/a | n/a |
| Dec | 31.1 C (88.0 F) | -6.7 C (19.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1953 | 38 |
| 1954 | 18 |
| 1955 | 48 |
| 1956 | 27 |
| 1957 | 23 |
| 1958 | 17 |
| 1959 | 12 |
| 1960 | 17 |
| 1961 | 13 |
| 1962 | 45 |
| 1963 | 19 |
| 1964 | 36 |
| 1965 | 45 |
| 1966 | 23 |
| 1967 | 22 |
| 1968 | 20 |
| 1969 | 21 |
| 1970 | 35 |
| 1971 | 54 |
| 1972 | 28 |
| 1973 | 22 |
| 1974 | 20 |
| 1975 | 21 |
| 1976 | 26 |
| 1977 | 17 |
| 1978 | 26 |
| 1979 | 17 |
| 1980 | 27 |
| 1981 | 3 |
| 1982 | 14 |
| 1983 | 16 |
| 1984 | 14 |
| 1985 | 17 |
| 1986 | 28 |
| 1987 | 21 |
| 1988 | 12 |
| 1989 | 22 |
| 1990 | 19 |
| 1991 | 13 |
| 1992 | 16 |
| 1993 | 14 |
| 1994 | 10 |
| 1995 | 15 |
| 1996 | 14 |
| 1997 | 13 |
| 1998 | 11 |
| 1999 | 12 |
| 2000 | 23 |
| 2001 | 22 |
| 2002 | 11 |
| 2003 | 28 |
| 2004 | 14 |
| 2005 | 27 |
| 2006 | 21 |
| 2007 | 11 |
| 2008 | 5 |
| 2009 | 14 |
| 2010 | 9 |
| 2011 | 13 |
| 2012 | 10 |
| 2013 | 11 |
| 2014 | 13 |
| 2015 | 11 |
| 2016 | 19 |
| 2017 | 11 |
| 2018 | 18 |
| 2019 | 8 |
| 2020 | 22 |
| 2021 | 18 |
| 2022 | 3 |
| 2023 | 14 |
| 2024 | 28 |
| 2025 | 17 |
| 2026 | 42 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 2003-08-12 | Record high minimum temperature | Record high minimum temperature 32.2 C (90.0 F) |
| 2005-09-08 | Record high minimum temperature | Record high minimum temperature 32.8 C (91.0 F) |
| 2005-09-09 | Record high minimum temperature | Record high minimum temperature 36.7 C (98.1 F) |
| 2013-01-13 | Record low minimum temperature | Record low minimum temperature -7.8 C (18.0 F) |
Wettest Day of Each Month
Sep: 98.3 mm (3.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 37.3 mm (1.5 in) | 26 January 2013 |
| Feb | 33.5 mm (1.3 in) | 8 February 1994 |
| Mar | 39.4 mm (1.6 in) | 3 March 1983 |
| Apr | 23.4 mm (0.9 in) | 6 April 2001 |
| May | 30.7 mm (1.2 in) | 12 May 1957 |
| Jun | 18.3 mm (0.7 in) | 19 June 1967 |
| Jul | 42.4 mm (1.7 in) | 26 July 2006 |
| Aug | 51.1 mm (2.0 in) | 3 August 1964 |
| Sep | 98.3 mm (3.9 in) | 15 September 1969 |
| Oct | 51.3 mm (2.0 in) | 2 October 2018 |
| Nov | 45.7 mm (1.8 in) | 1 November 1987 |
| Dec | 50.0 mm (2.0 in) | 15 December 1967 |
Period of Record Coverage
1953 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1953 | 365 | 100% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 363 | 99% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 334 | 92% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 362 | 99% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 151 | 41% | No |
| 1982 | 301 | 82% | No |
| 1983 | 365 | 100% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 361 | 99% | Yes |
| 1988 | 357 | 98% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 331 | 91% | Yes |
| 1991 | 354 | 97% | Yes |
| 1992 | 361 | 99% | Yes |
| 1993 | 363 | 99% | Yes |
| 1994 | 355 | 97% | Yes |
| 1995 | 350 | 96% | Yes |
| 1996 | 346 | 95% | Yes |
| 1997 | 308 | 84% | No |
| 1998 | 342 | 94% | Yes |
| 1999 | 318 | 87% | No |
| 2000 | 319 | 87% | No |
| 2001 | 333 | 91% | Yes |
| 2002 | 343 | 94% | Yes |
| 2003 | 354 | 97% | Yes |
| 2004 | 352 | 96% | Yes |
| 2005 | 339 | 93% | Yes |
| 2006 | 351 | 96% | Yes |
| 2007 | 342 | 94% | Yes |
| 2008 | 352 | 96% | Yes |
| 2009 | 329 | 90% | Yes |
| 2010 | 335 | 92% | Yes |
| 2011 | 336 | 92% | Yes |
| 2012 | 325 | 89% | No |
| 2013 | 328 | 90% | No |
| 2014 | 310 | 85% | No |
| 2015 | 324 | 89% | No |
| 2016 | 310 | 85% | No |
| 2017 | 325 | 89% | No |
| 2018 | 285 | 78% | No |
| 2019 | 295 | 81% | No |
| 2020 | 332 | 91% | Yes |
| 2021 | 314 | 86% | No |
| 2022 | 315 | 86% | No |
| 2023 | 297 | 81% | No |
| 2024 | 314 | 86% | No |
| 2025 | 322 | 88% | No |
| 2026 | 241 | 66% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 9 October 2026 | Tempe Asu, US | daily high min (Provisional) | 25.0 C (77.0 F) | 2.2 C (4.0 F) | 23 years | 18 of 100 (Routine) |
| 8 October 2026 | Tempe Asu, US | daily high min (Tie, Provisional) | 23.9 C (75.0 F) | tie | 25 years | 3 of 100 (Routine) |
| 12 September 2026 | Tempe Asu, US | daily high min (Tie, Provisional) | 27.2 C (81.0 F) | tie | 43 years | 4 of 100 (Routine) |
| 11 September 2026 | Tempe Asu, US | daily high min (Provisional) | 30.6 C (87.1 F) | 2.3 C (4.1 F) | 20 years | 18 of 100 (Routine) |
| 10 September 2026 | Tempe Asu, US | daily high min (Provisional) | 30.0 C (86.0 F) | 1.7 C (3.1 F) | 43 years | 23 of 100 (Routine) |
| 31 August 2026 | Tempe Asu, US | daily low max (Provisional) | 31.7 C (89.1 F) | 2.7 C (4.9 F) | 32 years | 26 of 100 (Routine) |
| 29 August 2026 | Tempe Asu, US | daily high min (Provisional) | 30.0 C (86.0 F) | 1.7 C (3.1 F) | 40 years | 24 of 100 (Routine) |
| 28 August 2026 | Tempe Asu, US | daily high min (Provisional) | 31.1 C (88.0 F) | 2.2 C (4.0 F) | 43 years | 25 of 100 (Routine) |
| 27 August 2026 | Tempe Asu, US | daily high min (Provisional) | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 27 years | 18 of 100 (Routine) |
| 26 August 2026 | Tempe Asu, US | daily high max (Provisional) | 45.6 C (114.1 F) | 0.6 C (1.1 F) | 15 years | 13 of 100 (Routine) |
| 25 August 2026 | Tempe Asu, US | daily high max (Provisional) | 44.4 C (111.9 F) | 0.5 C (0.9 F) | 15 years | 12 of 100 (Routine) |
| 22 August 2026 | Tempe Asu, US | daily high max (Tie, Provisional) | 45.0 C (113.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 18 August 2026 | Tempe Asu, US | daily high max (Tie, Provisional) | 44.4 C (111.9 F) | tie | 5 years | 2 of 100 (Routine) |
| 9 August 2026 | Tempe Asu, US | daily high min | 30.0 C (86.0 F) | 0.6 C (1.1 F) | 31 years | 17 of 100 (Routine) |
| 8 August 2026 | Tempe Asu, US | monthly high min | 33.9 C (93.0 F) | 0.6 C (1.1 F) | 0 years | 18 of 100 (Routine) |
| 5 August 2026 | Tempe Asu, US | daily high min | 32.2 C (90.0 F) | 2.2 C (4.0 F) | 40 years | 25 of 100 (Routine) |
| 4 August 2026 | Tempe Asu, US | daily high min (Tie) | 29.4 C (84.9 F) | tie | 1 year | 1 of 100 (Routine) |
| 3 August 2026 | Tempe Asu, US | monthly high min | 33.3 C (91.9 F) | 1.1 C (2.0 F) | 22 years | 26 of 100 (Routine) |
| 1 August 2026 | Tempe Asu, US | daily high min | 28.9 C (84.0 F) | 0.6 C (1.1 F) | 31 years | 17 of 100 (Routine) |
| 31 July 2026 | Tempe Asu, US | daily high min (Tie) | 30.6 C (87.1 F) | tie | 33 years | 4 of 100 (Routine) |
Climate Trend
58 complete years, 1953 to 2021| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1953 | 20.0 C | -1.61 C |
| 1954 | 21.1 C | -0.53 C |
| 1955 | 19.7 C | -1.86 C |
| 1956 | 20.3 C | -1.25 C |
| 1957 | 20.5 C | -1.14 C |
| 1958 | 21.1 C | -0.52 C |
| 1959 | 20.7 C | -0.89 C |
| 1960 | 20.4 C | -1.18 C |
| 1961 | 20.2 C | -1.36 C |
| 1962 | 20.7 C | -0.93 C |
| 1963 | 20.7 C | -0.90 C |
| 1964 | 19.4 C | -2.18 C |
| 1965 | 19.9 C | -1.65 C |
| 1967 | 20.4 C | -1.20 C |
| 1968 | 20.3 C | -1.34 C |
| 1969 | 20.7 C | -0.93 C |
| 1970 | 20.2 C | -1.40 C |
| 1971 | 19.8 C | -1.77 C |
| 1972 | 20.7 C | -0.93 C |
| 1973 | 20.2 C | -1.40 C |
| 1974 | 20.7 C | -0.85 C |
| 1975 | 20.0 C | -1.64 C |
| 1976 | 20.6 C | -1.00 C |
| 1977 | 20.9 C | -0.71 C |
| 1978 | 20.8 C | -0.77 C |
| 1979 | 20.4 C | -1.18 C |
| 1980 | 20.7 C | -0.91 C |
| 1983 | 22.2 C | +0.61 C |
| 1984 | 22.5 C | +0.87 C |
| 1985 | 22.6 C | +0.97 C |
| 1986 | 23.2 C | +1.62 C |
| 1987 | 22.7 C | +1.14 C |
| 1988 | 23.2 C | +1.63 C |
| 1989 | 23.5 C | +1.86 C |
| 1991 | 22.3 C | +0.70 C |
| 1992 | 22.3 C | +0.73 C |
| 1993 | 21.3 C | -0.31 C |
| 1994 | 21.8 C | +0.23 C |
| 1995 | 22.9 C | +1.35 C |
| 1996 | 23.5 C | +1.91 C |
| 1998 | 22.0 C | +0.42 C |
| 2001 | 23.6 C | +2.00 C |
| 2002 | 23.2 C | +1.64 C |
| 2003 | 23.5 C | +1.88 C |
| 2004 | 23.1 C | +1.50 C |
| 2005 | 23.7 C | +2.15 C |
| 2006 | 22.6 C | +1.05 C |
| 2007 | 22.6 C | +0.98 C |
| 2008 | 22.0 C | +0.40 C |
| 2010 | 21.9 C | +0.27 C |
| 2011 | 21.2 C | -0.39 C |
| 2012 | 21.9 C | +0.30 C |
| 2013 | 21.6 C | +0.02 C |
| 2015 | 22.4 C | +0.79 C |
| 2016 | 22.8 C | +1.22 C |
| 2017 | 22.9 C | +1.30 C |
| 2020 | 23.4 C | +1.76 C |
| 2021 | 23.0 C | +1.41 C |
The annual mean temperature here has risen by 0.5 C (0.4 to 0.6) per decade over 1953 to 2021. In Fahrenheit: 0.9 F (0.7 to 1.1) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.5 C (0.4 to 0.6) per decade | 0.9 F (0.7 to 1.1) per decade | 1953 to 2021 | 58 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.5) per decade | 1953 to 2021 | 58 | Rise |
| Mean daily minimum | 0.8 C (0.5 to 1.0) per decade | 1.4 F (1.0 to 1.7) per decade | 1953 to 2021 | 58 | 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
1953 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 48.3 C (118.9 F) | 1970 | 45.6 C (114.1 F) | 74 |
| Coldest night (TNn) | -7.8 C (18.0 F) | 2013 | -3.3 C (26.1 F) | 74 |
| Wettest day (Rx1day) | 98.3 mm (3.9 in) | 1969 | 29.5 mm (1.2 in) | 74 |
| Wettest five days (Rx5day) | 136.7 mm (5.4 in) | 1969 | 41.4 mm (1.6 in) | 74 |
| Longest dry spell (CDD) | 173 days | 1972 | 80 days | 74 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1953 | 43.9 C (111.0 F) |
| 1954 | 44.4 C (111.9 F) |
| 1955 | 45.6 C (114.1 F) |
| 1956 | 45.0 C (113.0 F) |
| 1957 | 46.1 C (115.0 F) |
| 1958 | 47.2 C (117.0 F) |
| 1959 | 45.0 C (113.0 F) |
| 1960 | 45.6 C (114.1 F) |
| 1961 | 45.0 C (113.0 F) |
| 1962 | 46.7 C (116.1 F) |
| 1963 | 45.0 C (113.0 F) |
| 1964 | 46.1 C (115.0 F) |
| 1965 | 45.6 C (114.1 F) |
| 1966 | 46.1 C (115.0 F) |
| 1967 | 46.1 C (115.0 F) |
| 1968 | 47.2 C (117.0 F) |
| 1969 | 47.2 C (117.0 F) |
| 1970 | 48.3 C (118.9 F) |
| 1971 | 47.2 C (117.0 F) |
| 1972 | 48.3 C (118.9 F) |
| 1973 | 46.1 C (115.0 F) |
| 1974 | 47.8 C (118.0 F) |
| 1975 | 46.7 C (116.1 F) |
| 1976 | 47.2 C (117.0 F) |
| 1977 | 45.6 C (114.1 F) |
| 1978 | 47.2 C (117.0 F) |
| 1979 | 47.2 C (117.0 F) |
| 1980 | 46.7 C (116.1 F) |
| 1981 | 39.4 C (102.9 F) |
| 1982 | 43.3 C (109.9 F) |
| 1983 | 44.4 C (111.9 F) |
| 1984 | 43.9 C (111.0 F) |
| 1985 | 45.0 C (113.0 F) |
| 1986 | 43.9 C (111.0 F) |
| 1987 | 44.4 C (111.9 F) |
| 1988 | 44.4 C (111.9 F) |
| 1989 | 45.0 C (113.0 F) |
| 1990 | 47.2 C (117.0 F) |
| 1991 | 42.2 C (108.0 F) |
| 1992 | 43.9 C (111.0 F) |
| 1993 | 43.9 C (111.0 F) |
| 1994 | 46.1 C (115.0 F) |
| 1995 | 47.8 C (118.0 F) |
| 1996 | 45.6 C (114.1 F) |
| 1997 | 43.9 C (111.0 F) |
| 1998 | 45.6 C (114.1 F) |
| 1999 | 42.8 C (109.0 F) |
| 2000 | 43.9 C (111.0 F) |
| 2001 | 46.1 C (115.0 F) |
| 2002 | 44.4 C (111.9 F) |
| 2003 | 45.6 C (114.1 F) |
| 2004 | 43.9 C (111.0 F) |
| 2005 | 45.6 C (114.1 F) |
| 2006 | 47.8 C (118.0 F) |
| 2007 | 45.6 C (114.1 F) |
| 2008 | 45.0 C (113.0 F) |
| 2009 | 44.4 C (111.9 F) |
| 2010 | 43.9 C (111.0 F) |
| 2011 | 46.1 C (115.0 F) |
| 2012 | 44.4 C (111.9 F) |
| 2013 | 45.6 C (114.1 F) |
| 2014 | 43.9 C (111.0 F) |
| 2015 | 44.4 C (111.9 F) |
| 2016 | 46.7 C (116.1 F) |
| 2017 | 47.2 C (117.0 F) |
| 2018 | 45.6 C (114.1 F) |
| 2019 | 44.4 C (111.9 F) |
| 2020 | 46.1 C (115.0 F) |
| 2021 | 47.2 C (117.0 F) |
| 2022 | 45.0 C (113.0 F) |
| 2023 | 46.7 C (116.1 F) |
| 2024 | 47.2 C (117.0 F) |
| 2025 | 47.8 C (118.0 F) |
| 2026 | 45.6 C (114.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1953 | -6.1 C (21.0 F) |
| 1954 | -6.7 C (19.9 F) |
| 1955 | -7.2 C (19.0 F) |
| 1956 | -5.0 C (23.0 F) |
| 1957 | -3.9 C (25.0 F) |
| 1958 | -4.4 C (24.1 F) |
| 1959 | -3.9 C (25.0 F) |
| 1960 | -4.4 C (24.1 F) |
| 1961 | -3.3 C (26.1 F) |
| 1962 | -6.1 C (21.0 F) |
| 1963 | -6.1 C (21.0 F) |
| 1964 | -5.6 C (21.9 F) |
| 1965 | -4.4 C (24.1 F) |
| 1966 | -3.9 C (25.0 F) |
| 1967 | -5.0 C (23.0 F) |
| 1968 | -4.4 C (24.1 F) |
| 1969 | -3.9 C (25.0 F) |
| 1970 | -5.0 C (23.0 F) |
| 1971 | -6.1 C (21.0 F) |
| 1972 | -5.0 C (23.0 F) |
| 1973 | -3.9 C (25.0 F) |
| 1974 | -5.0 C (23.0 F) |
| 1975 | -4.4 C (24.1 F) |
| 1976 | -5.0 C (23.0 F) |
| 1977 | -3.9 C (25.0 F) |
| 1978 | -5.0 C (23.0 F) |
| 1979 | -3.3 C (26.1 F) |
| 1980 | -2.2 C (28.0 F) |
| 1981 | -3.3 C (26.1 F) |
| 1982 | 1.1 C (34.0 F) |
| 1983 | 0.6 C (33.1 F) |
| 1984 | -0.6 C (30.9 F) |
| 1985 | -1.7 C (28.9 F) |
| 1986 | 1.1 C (34.0 F) |
| 1987 | -2.8 C (27.0 F) |
| 1988 | -2.2 C (28.0 F) |
| 1989 | -1.1 C (30.0 F) |
| 1990 | -4.4 C (24.1 F) |
| 1991 | -1.1 C (30.0 F) |
| 1992 | -1.1 C (30.0 F) |
| 1993 | -5.6 C (21.9 F) |
| 1994 | -3.3 C (26.1 F) |
| 1995 | 1.1 C (34.0 F) |
| 1996 | -0.6 C (30.9 F) |
| 1997 | -1.1 C (30.0 F) |
| 1998 | -1.7 C (28.9 F) |
| 1999 | 0.0 C (32.0 F) |
| 2000 | 0.6 C (33.1 F) |
| 2001 | -0.6 C (30.9 F) |
| 2002 | -0.6 C (30.9 F) |
| 2003 | -1.7 C (28.9 F) |
| 2004 | -2.8 C (27.0 F) |
| 2005 | -0.6 C (30.9 F) |
| 2006 | -3.3 C (26.1 F) |
| 2007 | -6.7 C (19.9 F) |
| 2008 | -2.8 C (27.0 F) |
| 2009 | -2.2 C (28.0 F) |
| 2010 | -4.4 C (24.1 F) |
| 2011 | -6.1 C (21.0 F) |
| 2012 | -2.2 C (28.0 F) |
| 2013 | -7.8 C (18.0 F) |
| 2014 | -3.3 C (26.1 F) |
| 2015 | -3.9 C (25.0 F) |
| 2016 | -2.8 C (27.0 F) |
| 2017 | -2.2 C (28.0 F) |
| 2018 | -3.9 C (25.0 F) |
| 2019 | -5.0 C (23.0 F) |
| 2020 | -1.1 C (30.0 F) |
| 2021 | -2.8 C (27.0 F) |
| 2022 | -3.9 C (25.0 F) |
| 2023 | -3.3 C (26.1 F) |
| 2024 | -1.7 C (28.9 F) |
| 2025 | -1.7 C (28.9 F) |
| 2026 | 2.2 C (36.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1953 | 39.1 mm (1.5 in) |
| 1954 | 18.5 mm (0.7 in) |
| 1955 | 30.7 mm (1.2 in) |
| 1956 | 17.0 mm (0.7 in) |
| 1957 | 30.7 mm (1.2 in) |
| 1958 | 36.8 mm (1.4 in) |
| 1959 | 39.6 mm (1.6 in) |
| 1960 | 20.3 mm (0.8 in) |
| 1961 | 40.4 mm (1.6 in) |
| 1962 | 25.7 mm (1.0 in) |
| 1963 | 36.1 mm (1.4 in) |
| 1964 | 51.1 mm (2.0 in) |
| 1965 | 28.4 mm (1.1 in) |
| 1966 | 18.8 mm (0.7 in) |
| 1967 | 50.0 mm (2.0 in) |
| 1968 | 29.7 mm (1.2 in) |
| 1969 | 98.3 mm (3.9 in) |
| 1970 | 23.6 mm (0.9 in) |
| 1971 | 10.7 mm (0.4 in) |
| 1972 | 31.0 mm (1.2 in) |
| 1973 | 23.9 mm (0.9 in) |
| 1974 | 36.1 mm (1.4 in) |
| 1975 | 23.9 mm (0.9 in) |
| 1976 | 37.8 mm (1.5 in) |
| 1977 | 19.8 mm (0.8 in) |
| 1978 | 37.6 mm (1.5 in) |
| 1979 | 27.9 mm (1.1 in) |
| 1980 | 18.5 mm (0.7 in) |
| 1981 | 19.8 mm (0.8 in) |
| 1982 | 23.4 mm (0.9 in) |
| 1983 | 39.4 mm (1.6 in) |
| 1984 | 29.2 mm (1.1 in) |
| 1985 | 35.8 mm (1.4 in) |
| 1986 | 30.5 mm (1.2 in) |
| 1987 | 45.7 mm (1.8 in) |
| 1988 | 36.3 mm (1.4 in) |
| 1989 | 28.7 mm (1.1 in) |
| 1990 | 23.4 mm (0.9 in) |
| 1991 | 36.1 mm (1.4 in) |
| 1992 | 38.1 mm (1.5 in) |
| 1993 | 37.3 mm (1.5 in) |
| 1994 | 33.5 mm (1.3 in) |
| 1995 | 35.3 mm (1.4 in) |
| 1996 | 40.6 mm (1.6 in) |
| 1997 | 20.8 mm (0.8 in) |
| 1998 | 23.9 mm (0.9 in) |
| 1999 | 22.1 mm (0.9 in) |
| 2000 | 20.3 mm (0.8 in) |
| 2001 | 40.9 mm (1.6 in) |
| 2002 | 17.8 mm (0.7 in) |
| 2003 | 26.2 mm (1.0 in) |
| 2004 | 30.2 mm (1.2 in) |
| 2005 | 28.4 mm (1.1 in) |
| 2006 | 42.4 mm (1.7 in) |
| 2007 | 32.3 mm (1.3 in) |
| 2008 | 40.9 mm (1.6 in) |
| 2009 | 33.3 mm (1.3 in) |
| 2010 | 25.4 mm (1.0 in) |
| 2011 | 18.0 mm (0.7 in) |
| 2012 | 21.8 mm (0.9 in) |
| 2013 | 40.9 mm (1.6 in) |
| 2014 | 78.2 mm (3.1 in) |
| 2015 | 26.7 mm (1.1 in) |
| 2016 | 21.8 mm (0.9 in) |
| 2017 | 27.9 mm (1.1 in) |
| 2018 | 51.3 mm (2.0 in) |
| 2019 | 33.5 mm (1.3 in) |
| 2020 | 23.9 mm (0.9 in) |
| 2021 | 29.2 mm (1.1 in) |
| 2022 | 18.5 mm (0.7 in) |
| 2023 | 17.8 mm (0.7 in) |
| 2024 | 22.9 mm (0.9 in) |
| 2025 | 41.9 mm (1.6 in) |
| 2026 | 19.1 mm (0.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1953 | 44.7 mm (1.8 in) |
| 1954 | 25.9 mm (1.0 in) |
| 1955 | 63.7 mm (2.5 in) |
| 1956 | 20.8 mm (0.8 in) |
| 1957 | 38.7 mm (1.5 in) |
| 1958 | 43.7 mm (1.7 in) |
| 1959 | 59.1 mm (2.3 in) |
| 1960 | 22.5 mm (0.9 in) |
| 1961 | 41.9 mm (1.6 in) |
| 1962 | 39.4 mm (1.6 in) |
| 1963 | 36.4 mm (1.4 in) |
| 1964 | 68.3 mm (2.7 in) |
| 1965 | 50.3 mm (2.0 in) |
| 1966 | 36.9 mm (1.5 in) |
| 1967 | 81.5 mm (3.2 in) |
| 1968 | 39.6 mm (1.6 in) |
| 1969 | 136.7 mm (5.4 in) |
| 1970 | 43.2 mm (1.7 in) |
| 1971 | 19.6 mm (0.8 in) |
| 1972 | 57.7 mm (2.3 in) |
| 1973 | 26.9 mm (1.1 in) |
| 1974 | 59.4 mm (2.3 in) |
| 1975 | 42.5 mm (1.7 in) |
| 1976 | 55.8 mm (2.2 in) |
| 1977 | 24.7 mm (1.0 in) |
| 1978 | 58.7 mm (2.3 in) |
| 1979 | 43.7 mm (1.7 in) |
| 1980 | 20.3 mm (0.8 in) |
| 1981 | 32.6 mm (1.3 in) |
| 1982 | 37.0 mm (1.5 in) |
| 1983 | 73.1 mm (2.9 in) |
| 1984 | 39.6 mm (1.6 in) |
| 1985 | 42.7 mm (1.7 in) |
| 1986 | 40.7 mm (1.6 in) |
| 1987 | 58.9 mm (2.3 in) |
| 1988 | 36.3 mm (1.4 in) |
| 1989 | 28.7 mm (1.1 in) |
| 1990 | 48.5 mm (1.9 in) |
| 1991 | 45.0 mm (1.8 in) |
| 1992 | 45.3 mm (1.8 in) |
| 1993 | 80.5 mm (3.2 in) |
| 1994 | 45.3 mm (1.8 in) |
| 1995 | 49.5 mm (1.9 in) |
| 1996 | 40.6 mm (1.6 in) |
| 1997 | 29.9 mm (1.2 in) |
| 1998 | 37.4 mm (1.5 in) |
| 1999 | 32.5 mm (1.3 in) |
| 2000 | 29.2 mm (1.1 in) |
| 2001 | 40.9 mm (1.6 in) |
| 2002 | 17.8 mm (0.7 in) |
| 2003 | 40.6 mm (1.6 in) |
| 2004 | 32.2 mm (1.3 in) |
| 2005 | 52.3 mm (2.1 in) |
| 2006 | 49.0 mm (1.9 in) |
| 2007 | 37.8 mm (1.5 in) |
| 2008 | 63.7 mm (2.5 in) |
| 2009 | 36.9 mm (1.5 in) |
| 2010 | 80.0 mm (3.1 in) |
| 2011 | 27.7 mm (1.1 in) |
| 2012 | 39.3 mm (1.5 in) |
| 2013 | 62.8 mm (2.5 in) |
| 2014 | 106.4 mm (4.2 in) |
| 2015 | 36.4 mm (1.4 in) |
| 2016 | 43.4 mm (1.7 in) |
| 2017 | 28.4 mm (1.1 in) |
| 2018 | 70.3 mm (2.8 in) |
| 2019 | 47.7 mm (1.9 in) |
| 2020 | 56.7 mm (2.2 in) |
| 2021 | 62.2 mm (2.4 in) |
| 2022 | 28.2 mm (1.1 in) |
| 2023 | 22.7 mm (0.9 in) |
| 2024 | 24.9 mm (1.0 in) |
| 2025 | 90.9 mm (3.6 in) |
| 2026 | 21.1 mm (0.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1953 | 84 days |
| 1954 | 68 days |
| 1955 | 105 days |
| 1956 | 100 days |
| 1957 | 51 days |
| 1958 | 86 days |
| 1959 | 87 days |
| 1960 | 142 days |
| 1961 | 94 days |
| 1962 | 99 days |
| 1963 | 86 days |
| 1964 | 76 days |
| 1965 | 41 days |
| 1966 | 58 days |
| 1967 | 64 days |
| 1968 | 62 days |
| 1969 | 72 days |
| 1970 | 115 days |
| 1971 | 68 days |
| 1972 | 173 days |
| 1973 | 128 days |
| 1974 | 108 days |
| 1975 | 93 days |
| 1976 | 65 days |
| 1977 | 49 days |
| 1978 | 97 days |
| 1979 | 137 days |
| 1980 | 60 days |
| 1981 | 42 days |
| 1982 | 62 days |
| 1983 | 77 days |
| 1984 | 91 days |
| 1985 | 78 days |
| 1986 | 60 days |
| 1987 | 65 days |
| 1988 | 88 days |
| 1989 | 105 days |
| 1990 | 33 days |
| 1991 | 114 days |
| 1992 | 33 days |
| 1993 | 82 days |
| 1994 | 53 days |
| 1995 | 95 days |
| 1996 | 113 days |
| 1997 | 89 days |
| 1998 | 54 days |
| 1999 | 100 days |
| 2000 | 82 days |
| 2001 | 75 days |
| 2002 | 93 days |
| 2003 | 105 days |
| 2004 | 35 days |
| 2005 | 59 days |
| 2006 | 79 days |
| 2007 | 80 days |
| 2008 | 89 days |
| 2009 | 92 days |
| 2010 | 127 days |
| 2011 | 53 days |
| 2012 | 77 days |
| 2013 | 130 days |
| 2014 | 128 days |
| 2015 | 51 days |
| 2016 | 66 days |
| 2017 | 71 days |
| 2018 | 81 days |
| 2019 | 71 days |
| 2020 | 110 days |
| 2021 | 101 days |
| 2022 | 58 days |
| 2023 | 39 days |
| 2024 | 60 days |
| 2025 | 41 days |
| 2026 | 50 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
44 years with a frostAcross 44 years with a frost, the median last spring frost at Tempe Asu falls on 1 March and the median first autumn frost on 30 November, which leaves a median of 276 days between them.
Fitted over all years, the growing season changes by +10.9 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1968 to 2021) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 1 March | n/a | 9 February | n/a | -7.2 days per decade |
| First autumn frost | 30 November | n/a | 3 December | n/a | +3.7 days per decade |
| Growing days | 276 days | n/a | 293 days | n/a | +10.9 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
68 years, 1953 to 2025A day with at least 30.2 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 73.8 mm (2.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 30.2 mm (1.2 in) | |
| 5 years | 40.8 mm (1.6 in) | |
| 10 years | 48.3 mm (1.9 in) | |
| 25 years | 58.1 mm (2.3 in) | |
| 50 years | 65.8 mm (2.6 in) | |
| 100 years | 73.8 mm (2.9 in) | Longer than the 68 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, 68 years of values from 1953 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: 98.3 mm (3.9 in) in 1969; 78.2 mm (3.1 in) in 2014; 51.3 mm (2.0 in) in 2018.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Tempe Asu, at 1976 and 1984. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1976 ran 0.3 C (0.6 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1984 ran 0.6 C (1.2 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1976 | -0.3 | -0.6 | likely | 5 |
| 1984 | +0.6 | +1.2 | possible | 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
2003 to 2021 against 1961 to 1990Over 2003 to 2021, Tempe Asu had a mean temperature of 22.6 C (72.6 F) and 210.3 mm (8.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Kofa Mine (United States, 191 km away), Borrego Desert Park (United States, 417 km away) and Desert Resorts Rgnl AP (United States, 394 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Kofa Mine | United States | 191 km (119 mi) | 22.6 C (72.6 F) | 161.3 mm (6.4 in) | 0.55 |
| Borrego Desert Park | United States | 417 km (259 mi) | 22.6 C (72.6 F) | 174.7 mm (6.9 in) | 0.63 |
| Desert Resorts Rgnl AP | United States | 394 km (245 mi) | 22.4 C (72.3 F) | 85.0 mm (3.3 in) | 0.69 |
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).