Rio Salado Weather Records (MXN00013090)
Record envelope, standing records and threshold days for Rio Salado (MXN00013090), Mexico, with 47 years of record.
Key Facts for Rio Salado
- Rio Salado (MXN00013090) is a weather station in Mexico at 20.18 latitude and -99.25 longitude, 2,000 m (6,561 ft) above sea level.
- The station reports from 1966 to 2012, 47 years of record.
- 1,464 records set at Rio Salado still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Rio Salado tied a daily record high maximum temperature of 28.9 C (84.0 F) on 29 July 2012.
About the Station
- Location: Mexico, 20.18 latitude, -99.25 longitude.
- Elevation: 2,000 m (6,561 ft).
- Period of record: 1966 to 2012, 47 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 32.8 C (91.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Feb | 33.9 C (93.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Mar | 35.0 C (95.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Apr | 37.8 C (100.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| May | 35.6 C (96.1 F) | 3.3 C (37.9 F) | n/a | n/a |
| Jun | 33.9 C (93.0 F) | 3.9 C (39.0 F) | n/a | n/a |
| Jul | 30.0 C (86.0 F) | 5.0 C (41.0 F) | n/a | n/a |
| Aug | 31.7 C (89.1 F) | 6.1 C (43.0 F) | n/a | n/a |
| Sep | 30.0 C (86.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Oct | 35.6 C (96.1 F) | -3.3 C (26.1 F) | n/a | n/a |
| Nov | 30.0 C (86.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Dec | 30.0 C (86.0 F) | -6.1 C (21.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1966 | 32 |
| 1967 | 39 |
| 1968 | 14 |
| 1969 | 67 |
| 1970 | 43 |
| 1971 | 30 |
| 1972 | 33 |
| 1973 | 40 |
| 1974 | 33 |
| 1975 | 28 |
| 1976 | 39 |
| 1977 | 36 |
| 1978 | 36 |
| 1979 | 53 |
| 1980 | 24 |
| 1981 | 28 |
| 1982 | 30 |
| 1983 | 45 |
| 1984 | 37 |
| 1985 | 15 |
| 1986 | 33 |
| 1987 | 35 |
| 1988 | 25 |
| 1989 | 39 |
| 1990 | 41 |
| 1991 | 23 |
| 1992 | 25 |
| 1993 | 24 |
| 1994 | 23 |
| 1995 | 128 |
| 1996 | 72 |
| 1997 | 22 |
| 1998 | 37 |
| 1999 | 10 |
| 2000 | 17 |
| 2001 | 38 |
| 2002 | 28 |
| 2003 | 4 |
| 2004 | 3 |
| 2005 | 13 |
| 2006 | 5 |
| 2007 | 20 |
| 2008 | 25 |
| 2009 | 27 |
| 2010 | 21 |
| 2011 | 22 |
| 2012 | 2 |
Wettest Day of Each Month
Sep: 89.9 mm (3.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 30.5 mm (1.2 in) | 28 January 1992 |
| Feb | 18.8 mm (0.7 in) | 3 February 2010 |
| Mar | 29.0 mm (1.1 in) | 4 March 1988 |
| Apr | 50.8 mm (2.0 in) | 28 April 1968 |
| May | 75.9 mm (3.0 in) | 15 May 1986 |
| Jun | 79.2 mm (3.1 in) | 25 June 1967 |
| Jul | 58.4 mm (2.3 in) | 5 July 1976 |
| Aug | 42.4 mm (1.7 in) | 22 August 2007 |
| Sep | 89.9 mm (3.5 in) | 21 September 1976 |
| Oct | 49.3 mm (1.9 in) | 8 October 1994 |
| Nov | 30.0 mm (1.2 in) | 1 November 1992 |
| Dec | 15.0 mm (0.6 in) | 19 December 1976 |
Period of Record Coverage
1966 to 2012| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1966 | 240 | 66% | No |
| 1967 | 351 | 96% | Yes |
| 1968 | 325 | 89% | No |
| 1969 | 354 | 97% | Yes |
| 1970 | 353 | 97% | Yes |
| 1971 | 358 | 98% | Yes |
| 1972 | 360 | 98% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 361 | 99% | Yes |
| 1978 | 362 | 99% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 364 | 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 | 327 | 90% | No |
| 1996 | 310 | 85% | No |
| 1997 | 347 | 95% | Yes |
| 1998 | 351 | 96% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 332 | 91% | Yes |
| 2006 | 354 | 97% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 112 | 31% | No |
| 2010 | 322 | 88% | No |
| 2011 | 293 | 80% | No |
| 2012 | 31 | 8% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 29 July 2012 | Rio Salado, MX | daily high max (Tie) | 28.9 C (84.0 F) | tie | 17 years | 2 of 100 (Routine) |
| 26 July 2012 | Rio Salado, MX | daily low min (Tie) | 7.8 C (46.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 23 July 2012 | Rio Salado, MX | daily high max (Tie) | 28.9 C (84.0 F) | tie | 17 years | 2 of 100 (Routine) |
| 15 July 2012 | Rio Salado, MX | daily low min (Tie) | 7.8 C (46.0 F) | tie | 7 years | 1 of 100 (Routine) |
| 7 July 2012 | Rio Salado, MX | daily high max (Tie) | 28.9 C (84.0 F) | tie | 17 years | 2 of 100 (Routine) |
| 6 July 2012 | Rio Salado, MX | monthly high max (Tie) | 30.0 C (86.0 F) | tie | 44 years | 6 of 100 (Routine) |
| 5 July 2012 | Rio Salado, MX | daily high max (Tie) | 27.8 C (82.0 F) | tie | 17 years | 2 of 100 (Routine) |
| 5 July 2012 | Rio Salado, MX | daily low min (Tie) | 7.8 C (46.0 F) | tie | 11 years | 1 of 100 (Routine) |
| 4 July 2012 | Rio Salado, MX | daily low min | 7.8 C (46.0 F) | 1.1 C (2.0 F) | 13 years | 12 of 100 (Routine) |
| 4 July 2012 | Rio Salado, MX | daily high max (Tie) | 28.9 C (84.0 F) | tie | 17 years | 2 of 100 (Routine) |
| 1 July 2012 | Rio Salado, MX | daily low min (Tie) | 7.8 C (46.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 19 November 2011 | Rio Salado, MX | daily high max (Tie) | 28.9 C (84.0 F) | tie | 24 years | 2 of 100 (Routine) |
| 9 November 2011 | Rio Salado, MX | daily rain | 2.8 mm (0.11 in) | 2.8 mm (0.11 in) | 44 years | 20 of 100 (Routine) |
| 5 October 2011 | Rio Salado, MX | daily high max (Tie) | 27.8 C (82.0 F) | tie | 14 years | 2 of 100 (Routine) |
| 27 August 2011 | Rio Salado, MX | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 16 years | 12 of 100 (Routine) |
| 26 August 2011 | Rio Salado, MX | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 10 years | 11 of 100 (Routine) |
| 19 August 2011 | Rio Salado, MX | daily high max (Tie) | 30.0 C (86.0 F) | tie | 1 year | 1 of 100 (Routine) |
| 15 August 2011 | Rio Salado, MX | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 1 year | 6 of 100 (Routine) |
| 7 August 2011 | Rio Salado, MX | daily high max (Tie) | 30.0 C (86.0 F) | tie | 1 year | 1 of 100 (Routine) |
| 20 July 2011 | Rio Salado, MX | daily high max (Tie) | 28.9 C (84.0 F) | tie | 44 years | 4 of 100 (Routine) |
Climate Trend
36 complete years, 1967 to 2008| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1967 | 16.2 C | -0.29 C |
| 1969 | 16.3 C | -0.23 C |
| 1970 | 16.3 C | -0.19 C |
| 1971 | 16.3 C | -0.18 C |
| 1972 | 16.7 C | +0.17 C |
| 1973 | 16.5 C | +0.03 C |
| 1974 | 16.0 C | -0.52 C |
| 1975 | 16.2 C | -0.26 C |
| 1976 | 15.8 C | -0.66 C |
| 1977 | 16.6 C | +0.14 C |
| 1978 | 16.7 C | +0.23 C |
| 1979 | 16.3 C | -0.20 C |
| 1980 | 16.4 C | -0.04 C |
| 1981 | 16.1 C | -0.43 C |
| 1982 | 16.7 C | +0.26 C |
| 1983 | 16.5 C | 0.00 C |
| 1984 | 16.0 C | -0.49 C |
| 1985 | 16.1 C | -0.40 C |
| 1986 | 16.2 C | -0.30 C |
| 1987 | 16.2 C | -0.26 C |
| 1988 | 16.2 C | -0.25 C |
| 1989 | 16.0 C | -0.47 C |
| 1990 | 16.1 C | -0.41 C |
| 1991 | 16.4 C | -0.07 C |
| 1992 | 15.9 C | -0.63 C |
| 1993 | 16.1 C | -0.40 C |
| 1994 | 16.5 C | +0.04 C |
| 1999 | 16.9 C | +0.46 C |
| 2000 | 17.8 C | +1.34 C |
| 2001 | 17.4 C | +0.88 C |
| 2002 | 17.4 C | +0.88 C |
| 2003 | 16.7 C | +0.18 C |
| 2004 | 16.6 C | +0.12 C |
| 2006 | 16.6 C | +0.07 C |
| 2007 | 17.3 C | +0.81 C |
| 2008 | 17.7 C | +1.20 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.4) per decade over 1967 to 2008. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 36 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 (0.1 to 0.4) per decade | 0.4 F (0.2 to 0.6) per decade | 1967 to 2008 | 36 | Rise |
| Mean daily maximum | 0.5 C (0.3 to 0.7) per decade | 0.9 F (0.5 to 1.3) per decade | 1967 to 2008 | 36 | Rise |
| Mean daily minimum | -0.03 C (-0.17 to 0.11) per decade | -0.1 F (-0.3 to 0.2) per decade | 1967 to 2008 | 36 | Not clearly different from zero |
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
1966 to 2012| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 37.8 C (100.0 F) | 1971 | 32.8 C (91.0 F) | 47 |
| Coldest night (TNn) | -6.7 C (19.9 F) | 1976 | -3.3 C (26.1 F) | 47 |
| Wettest day (Rx1day) | 89.9 mm (3.5 in) | 1976 | 39.9 mm (1.6 in) | 47 |
| Wettest five days (Rx5day) | 148.6 mm (5.9 in) | 1976 | 73.0 mm (2.9 in) | 47 |
| Longest dry spell (CDD) | 114 days | 2008 | 59 days | 47 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1966 | 32.2 C (90.0 F) |
| 1967 | 32.8 C (91.0 F) |
| 1968 | 31.1 C (88.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 35.0 C (95.0 F) |
| 1971 | 37.8 C (100.0 F) |
| 1972 | 35.0 C (95.0 F) |
| 1973 | 34.4 C (93.9 F) |
| 1974 | 35.0 C (95.0 F) |
| 1975 | 34.4 C (93.9 F) |
| 1976 | 31.1 C (88.0 F) |
| 1977 | 35.6 C (96.1 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 33.3 C (91.9 F) |
| 1980 | 32.8 C (91.0 F) |
| 1981 | 31.7 C (89.1 F) |
| 1982 | 33.9 C (93.0 F) |
| 1983 | 35.0 C (95.0 F) |
| 1984 | 34.4 C (93.9 F) |
| 1985 | 30.6 C (87.1 F) |
| 1986 | 34.4 C (93.9 F) |
| 1987 | 32.8 C (91.0 F) |
| 1988 | 35.0 C (95.0 F) |
| 1989 | 34.4 C (93.9 F) |
| 1990 | 32.8 C (91.0 F) |
| 1991 | 33.9 C (93.0 F) |
| 1992 | 30.6 C (87.1 F) |
| 1993 | 31.1 C (88.0 F) |
| 1994 | 33.3 C (91.9 F) |
| 1995 | 32.2 C (90.0 F) |
| 1996 | 30.6 C (87.1 F) |
| 1997 | 30.6 C (87.1 F) |
| 1998 | 35.6 C (96.1 F) |
| 1999 | 32.8 C (91.0 F) |
| 2000 | 30.6 C (87.1 F) |
| 2001 | 32.8 C (91.0 F) |
| 2002 | 33.9 C (93.0 F) |
| 2003 | 32.8 C (91.0 F) |
| 2004 | 30.6 C (87.1 F) |
| 2005 | 32.8 C (91.0 F) |
| 2006 | 30.6 C (87.1 F) |
| 2007 | 30.6 C (87.1 F) |
| 2008 | 33.9 C (93.0 F) |
| 2009 | 31.7 C (89.1 F) |
| 2010 | 33.9 C (93.0 F) |
| 2011 | 33.9 C (93.0 F) |
| 2012 | 30.0 C (86.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1966 | -4.4 C (24.1 F) |
| 1967 | -5.0 C (23.0 F) |
| 1968 | -2.2 C (28.0 F) |
| 1969 | -1.7 C (28.9 F) |
| 1970 | -3.9 C (25.0 F) |
| 1971 | -2.2 C (28.0 F) |
| 1972 | -2.8 C (27.0 F) |
| 1973 | -5.0 C (23.0 F) |
| 1974 | -3.9 C (25.0 F) |
| 1975 | -5.0 C (23.0 F) |
| 1976 | -6.7 C (19.9 F) |
| 1977 | -2.8 C (27.0 F) |
| 1978 | -1.1 C (30.0 F) |
| 1979 | -5.0 C (23.0 F) |
| 1980 | -5.0 C (23.0 F) |
| 1981 | -5.0 C (23.0 F) |
| 1982 | -3.9 C (25.0 F) |
| 1983 | -3.9 C (25.0 F) |
| 1984 | -3.9 C (25.0 F) |
| 1985 | -4.4 C (24.1 F) |
| 1986 | -6.7 C (19.9 F) |
| 1987 | -4.4 C (24.1 F) |
| 1988 | -6.1 C (21.0 F) |
| 1989 | -5.6 C (21.9 F) |
| 1990 | -3.3 C (26.1 F) |
| 1991 | 0.0 C (32.0 F) |
| 1992 | -2.2 C (28.0 F) |
| 1993 | 0.0 C (32.0 F) |
| 1994 | -3.9 C (25.0 F) |
| 1995 | 0.0 C (32.0 F) |
| 1996 | 1.7 C (35.1 F) |
| 1997 | -6.1 C (21.0 F) |
| 1998 | -3.3 C (26.1 F) |
| 1999 | -3.3 C (26.1 F) |
| 2000 | 0.0 C (32.0 F) |
| 2001 | 0.6 C (33.1 F) |
| 2002 | -4.4 C (24.1 F) |
| 2003 | -3.3 C (26.1 F) |
| 2004 | -2.2 C (28.0 F) |
| 2005 | -1.1 C (30.0 F) |
| 2006 | -2.2 C (28.0 F) |
| 2007 | 0.0 C (32.0 F) |
| 2008 | -2.2 C (28.0 F) |
| 2009 | 0.6 C (33.1 F) |
| 2010 | -2.2 C (28.0 F) |
| 2011 | -3.3 C (26.1 F) |
| 2012 | 6.7 C (44.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1966 | 39.9 mm (1.6 in) |
| 1967 | 79.2 mm (3.1 in) |
| 1968 | 52.8 mm (2.1 in) |
| 1969 | 34.8 mm (1.4 in) |
| 1970 | 47.0 mm (1.9 in) |
| 1971 | 33.8 mm (1.3 in) |
| 1972 | 41.9 mm (1.6 in) |
| 1973 | 50.8 mm (2.0 in) |
| 1974 | 49.3 mm (1.9 in) |
| 1975 | 33.8 mm (1.3 in) |
| 1976 | 89.9 mm (3.5 in) |
| 1977 | 31.0 mm (1.2 in) |
| 1978 | 37.8 mm (1.5 in) |
| 1979 | 34.3 mm (1.4 in) |
| 1980 | 26.9 mm (1.1 in) |
| 1981 | 46.0 mm (1.8 in) |
| 1982 | 47.0 mm (1.9 in) |
| 1983 | 41.9 mm (1.6 in) |
| 1984 | 37.3 mm (1.5 in) |
| 1985 | 39.4 mm (1.6 in) |
| 1986 | 75.9 mm (3.0 in) |
| 1987 | 32.8 mm (1.3 in) |
| 1988 | 47.0 mm (1.9 in) |
| 1989 | 52.3 mm (2.1 in) |
| 1990 | 59.9 mm (2.4 in) |
| 1991 | 51.3 mm (2.0 in) |
| 1992 | 39.9 mm (1.6 in) |
| 1993 | 29.0 mm (1.1 in) |
| 1994 | 49.3 mm (1.9 in) |
| 1995 | 29.0 mm (1.1 in) |
| 1996 | 29.2 mm (1.1 in) |
| 1997 | 35.8 mm (1.4 in) |
| 1998 | 47.5 mm (1.9 in) |
| 1999 | 49.3 mm (1.9 in) |
| 2000 | 36.6 mm (1.4 in) |
| 2001 | 27.9 mm (1.1 in) |
| 2002 | 47.8 mm (1.9 in) |
| 2003 | 41.9 mm (1.6 in) |
| 2004 | 40.4 mm (1.6 in) |
| 2005 | 39.9 mm (1.6 in) |
| 2006 | 33.8 mm (1.3 in) |
| 2007 | 42.4 mm (1.7 in) |
| 2008 | 19.8 mm (0.8 in) |
| 2009 | 18.8 mm (0.7 in) |
| 2010 | 22.9 mm (0.9 in) |
| 2011 | 27.9 mm (1.1 in) |
| 2012 | 35.3 mm (1.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1966 | 74.2 mm (2.9 in) |
| 1967 | 89.2 mm (3.5 in) |
| 1968 | 106.1 mm (4.2 in) |
| 1969 | 55.9 mm (2.2 in) |
| 1970 | 95.1 mm (3.7 in) |
| 1971 | 76.3 mm (3.0 in) |
| 1972 | 69.9 mm (2.8 in) |
| 1973 | 105.5 mm (4.2 in) |
| 1974 | 97.0 mm (3.8 in) |
| 1975 | 93.2 mm (3.7 in) |
| 1976 | 148.6 mm (5.9 in) |
| 1977 | 54.4 mm (2.1 in) |
| 1978 | 47.0 mm (1.9 in) |
| 1979 | 78.0 mm (3.1 in) |
| 1980 | 56.2 mm (2.2 in) |
| 1981 | 70.9 mm (2.8 in) |
| 1982 | 73.0 mm (2.9 in) |
| 1983 | 60.5 mm (2.4 in) |
| 1984 | 60.7 mm (2.4 in) |
| 1985 | 77.1 mm (3.0 in) |
| 1986 | 80.7 mm (3.2 in) |
| 1987 | 56.2 mm (2.2 in) |
| 1988 | 75.7 mm (3.0 in) |
| 1989 | 62.0 mm (2.4 in) |
| 1990 | 108.1 mm (4.3 in) |
| 1991 | 71.6 mm (2.8 in) |
| 1992 | 62.0 mm (2.4 in) |
| 1993 | 47.0 mm (1.9 in) |
| 1994 | 69.1 mm (2.7 in) |
| 1995 | 37.3 mm (1.5 in) |
| 1996 | 80.0 mm (3.1 in) |
| 1997 | 55.9 mm (2.2 in) |
| 1998 | 75.9 mm (3.0 in) |
| 1999 | 129.3 mm (5.1 in) |
| 2000 | 91.2 mm (3.6 in) |
| 2001 | 77.4 mm (3.0 in) |
| 2002 | 97.8 mm (3.9 in) |
| 2003 | 69.6 mm (2.7 in) |
| 2004 | 83.9 mm (3.3 in) |
| 2005 | 60.5 mm (2.4 in) |
| 2006 | 50.8 mm (2.0 in) |
| 2007 | 120.9 mm (4.8 in) |
| 2008 | 59.2 mm (2.3 in) |
| 2009 | 61.5 mm (2.4 in) |
| 2010 | 74.2 mm (2.9 in) |
| 2011 | 63.3 mm (2.5 in) |
| 2012 | 39.6 mm (1.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1966 | 52 days |
| 1967 | 61 days |
| 1968 | 48 days |
| 1969 | 88 days |
| 1970 | 97 days |
| 1971 | 80 days |
| 1972 | 41 days |
| 1973 | 102 days |
| 1974 | 38 days |
| 1975 | 82 days |
| 1976 | 42 days |
| 1977 | 49 days |
| 1978 | 23 days |
| 1979 | 39 days |
| 1980 | 34 days |
| 1981 | 45 days |
| 1982 | 56 days |
| 1983 | 63 days |
| 1984 | 68 days |
| 1985 | 52 days |
| 1986 | 102 days |
| 1987 | 109 days |
| 1988 | 108 days |
| 1989 | 64 days |
| 1990 | 71 days |
| 1991 | 55 days |
| 1992 | 46 days |
| 1993 | 47 days |
| 1994 | 40 days |
| 1995 | 40 days |
| 1996 | 90 days |
| 1997 | 61 days |
| 1998 | 100 days |
| 1999 | 106 days |
| 2000 | 70 days |
| 2001 | 63 days |
| 2002 | 92 days |
| 2003 | 97 days |
| 2004 | 59 days |
| 2005 | 52 days |
| 2006 | 59 days |
| 2007 | 39 days |
| 2008 | 114 days |
| 2009 | 33 days |
| 2010 | 53 days |
| 2011 | 57 days |
| 2012 | 17 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
30 years with a frostAcross 30 years with a frost, the median last spring frost at Rio Salado falls on 26 February and the median first autumn frost on 15 November, which leaves a median of 264 days between them.
Fitted over all years, the growing season changes by +1.7 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1967 to 2008) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 26 February | n/a | 26 February | n/a | -3.2 days per decade |
| First autumn frost | 15 November | n/a | 15 November | n/a | -1.6 days per decade |
| Growing days | 264 days | n/a | 264 days | n/a | +1.7 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
40 years, 1967 to 2008A day with at least 41.2 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 89.7 mm (3.5 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 41.2 mm (1.6 in) | |
| 5 years | 52.9 mm (2.1 in) | |
| 10 years | 61.1 mm (2.4 in) | |
| 25 years | 72.1 mm (2.8 in) | |
| 50 years | 80.8 mm (3.2 in) | Longer than the 40 years of record |
| 100 years | 89.7 mm (3.5 in) | Longer than the 40 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, 40 years of values from 1967 to 2008.
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: 89.9 mm (3.5 in) in 1976; 79.2 mm (3.1 in) in 1967; 75.9 mm (3.0 in) in 1986.
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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 (2025-12-31).