Delta Weather Records (MXN00002011)
Record envelope, standing records and threshold days for Delta (MXN00002011), Mexico, with 65 years of record.
Key Facts for Delta
- Delta (MXN00002011) is a weather station in Mexico at 32.35 latitude and -115.18 longitude, 12 m (39 ft) above sea level.
- The station reports from 1948 to 2012, 65 years of record.
- 1,464 records set at Delta still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Delta tied a daily record high maximum temperature of 45.0 C (113.0 F) on 2 October 2012.
About the Station
- Location: Mexico, 32.35 latitude, -115.18 longitude.
- Elevation: 12 m (39 ft).
- Period of record: 1948 to 2012, 65 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 | 38.9 C (102.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Feb | 41.7 C (107.1 F) | -3.9 C (25.0 F) | n/a | n/a |
| Mar | 43.9 C (111.0 F) | -2.2 C (28.0 F) | n/a | n/a |
| Apr | 45.6 C (114.1 F) | 0.0 C (32.0 F) | n/a | n/a |
| May | 48.9 C (120.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jun | 55.6 C (132.1 F) | 2.8 C (37.0 F) | n/a | n/a |
| Jul | 56.7 C (134.1 F) | 6.7 C (44.1 F) | n/a | n/a |
| Aug | 56.7 C (134.1 F) | 10.0 C (50.0 F) | n/a | n/a |
| Sep | 55.0 C (131.0 F) | 5.6 C (42.1 F) | n/a | n/a |
| Oct | 47.8 C (118.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Nov | 47.8 C (118.0 F) | -3.3 C (26.1 F) | n/a | n/a |
| Dec | 40.0 C (104.0 F) | -5.0 C (23.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1948 | 34 |
| 1949 | 35 |
| 1950 | 58 |
| 1951 | 45 |
| 1952 | 33 |
| 1953 | 75 |
| 1954 | 8 |
| 1955 | 24 |
| 1956 | 31 |
| 1957 | 40 |
| 1958 | 76 |
| 1959 | 16 |
| 1960 | 37 |
| 1961 | 11 |
| 1962 | 17 |
| 1963 | 13 |
| 1964 | 19 |
| 1965 | 12 |
| 1966 | 74 |
| 1967 | 91 |
| 1968 | 11 |
| 1969 | 16 |
| 1970 | 17 |
| 1971 | 30 |
| 1972 | 25 |
| 1973 | 9 |
| 1974 | 4 |
| 1975 | 11 |
| 1976 | 13 |
| 1977 | 15 |
| 1978 | 13 |
| 1979 | 18 |
| 1980 | 22 |
| 1981 | 15 |
| 1982 | 17 |
| 1983 | 28 |
| 1984 | 28 |
| 1985 | 19 |
| 1986 | 16 |
| 1987 | 14 |
| 1988 | 8 |
| 1989 | 23 |
| 1990 | 16 |
| 1991 | 4 |
| 1992 | 39 |
| 1993 | 40 |
| 1994 | 83 |
| 1995 | 9 |
| 1996 | 18 |
| 1997 | 8 |
| 1998 | 7 |
| 1999 | 4 |
| 2000 | 11 |
| 2001 | 10 |
| 2002 | 3 |
| 2003 | 5 |
| 2004 | 11 |
| 2005 | 1 |
| 2006 | 14 |
| 2007 | 11 |
| 2008 | 8 |
| 2009 | 4 |
| 2010 | 20 |
| 2011 | 14 |
| 2012 | 3 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1982-08-22 | Record high minimum temperature | Record high minimum temperature 32.2 C (90.0 F) |
| 1996-07-31 | Record high minimum temperature | Record high minimum temperature 32.8 C (91.0 F) |
| 1997-12-26 | Record low minimum temperature | Record low minimum temperature -5.0 C (23.0 F) |
| 1998-09-01 | Record high minimum temperature | Record high minimum temperature 33.9 C (93.0 F) |
| 2007-01-14 | Record low minimum temperature | Record low minimum temperature -6.1 C (21.0 F) |
| 2010-08-24 | Record high minimum temperature | Record high minimum temperature 35.0 C (95.0 F) |
Wettest Day of Each Month
Oct: 63.0 mm (2.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 31.8 mm (1.3 in) | 20 January 2010 |
| Feb | 40.4 mm (1.6 in) | 2 February 1983 |
| Mar | 24.9 mm (1.0 in) | 27 March 1992 |
| Apr | 11.9 mm (0.5 in) | 27 April 1952 |
| May | 11.9 mm (0.5 in) | 23 May 1977 |
| Jun | 5.8 mm (0.23 in) | 25 June 1955 |
| Jul | 50.8 mm (2.0 in) | 30 July 2012 |
| Aug | 45.0 mm (1.8 in) | 11 August 1979 |
| Sep | 37.8 mm (1.5 in) | 11 September 2008 |
| Oct | 63.0 mm (2.5 in) | 6 October 1972 |
| Nov | 21.8 mm (0.9 in) | 30 November 2007 |
| Dec | 43.9 mm (1.7 in) | 8 December 1982 |
Period of Record Coverage
1948 to 2012| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1948 | 178 | 49% | No |
| 1949 | 365 | 100% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 353 | 97% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 360 | 99% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 324 | 89% | No |
| 1957 | 359 | 98% | Yes |
| 1958 | 361 | 99% | Yes |
| 1959 | 361 | 99% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 363 | 99% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 207 | 57% | No |
| 1964 | 364 | 99% | Yes |
| 1965 | 362 | 99% | Yes |
| 1966 | 362 | 99% | Yes |
| 1967 | 335 | 92% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 363 | 99% | Yes |
| 1970 | 360 | 99% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 362 | 99% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 333 | 91% | Yes |
| 1978 | 333 | 91% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 302 | 83% | No |
| 1985 | 364 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 207 | 57% | No |
| 1990 | 272 | 75% | No |
| 1991 | 103 | 28% | No |
| 1992 | 169 | 46% | No |
| 1993 | 85 | 23% | No |
| 1994 | 175 | 48% | No |
| 1995 | 210 | 58% | No |
| 1996 | 365 | 100% | Yes |
| 1997 | 327 | 90% | No |
| 1998 | 356 | 98% | Yes |
| 1999 | 352 | 96% | Yes |
| 2000 | 353 | 96% | Yes |
| 2001 | 332 | 91% | Yes |
| 2002 | 294 | 81% | No |
| 2003 | 332 | 91% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 356 | 98% | Yes |
| 2006 | 362 | 99% | Yes |
| 2007 | 361 | 99% | Yes |
| 2008 | 335 | 92% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 363 | 99% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 270 | 74% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 2 October 2012 | Delta, MX | daily high max (Tie) | 45.0 C (113.0 F) | tie | 22 years | 3 of 100 (Routine) |
| 10 September 2012 | Delta, MX | daily low max | 28.9 C (84.0 F) | 3.9 C (7.0 F) | 36 years | 25 of 100 (Routine) |
| 31 July 2012 | Delta, MX | daily low max | 31.1 C (88.0 F) | 2.8 C (5.0 F) | 49 years | 27 of 100 (Routine) |
| 30 July 2012 | Delta, MX | monthly rain | 50.8 mm (2.0 in) | 37.8 mm (1.5 in) | 28 years | 64 of 100 (Major) |
| 17 July 2012 | Delta, MX | daily low min | 16.1 C (61.0 F) | 0.6 C (1.1 F) | 61 years | 25 of 100 (Routine) |
| 12 July 2012 | Delta, MX | daily low max (Tie) | 38.3 C (100.9 F) | tie | 33 years | 3 of 100 (Routine) |
| 11 July 2012 | Delta, MX | daily rain | 2.3 mm (0.09 in) | 1.5 mm (0.06 in) | 13 years | 13 of 100 (Routine) |
| 29 February 2012 | Delta, MX | daily low max (Tie) | 18.9 C (66.0 F) | tie | 56 years | 5 of 100 (Routine) |
| 29 February 2012 | Delta, MX | daily low min (Tie) | 2.8 C (37.0 F) | tie | 48 years | 5 of 100 (Routine) |
| 13 December 2011 | Delta, MX | daily rain | 21.8 mm (0.9 in) | 21.8 mm (0.9 in) | 62 years | 20 of 100 (Routine) |
| 12 December 2011 | Delta, MX | daily rain | 2.3 mm (0.09 in) | 1.0 mm (0.04 in) | 60 years | 20 of 100 (Routine) |
| 8 December 2011 | Delta, MX | daily low min | -2.2 C (28.0 F) | 2.8 C (5.0 F) | 49 years | 28 of 100 (Routine) |
| 5 December 2011 | Delta, MX | daily low max | 16.1 C (61.0 F) | 0.6 C (1.1 F) | 38 years | 18 of 100 (Routine) |
| 4 December 2011 | Delta, MX | daily low max | 11.7 C (53.1 F) | 1.6 C (2.9 F) | 57 years | 26 of 100 (Routine) |
| 3 December 2011 | Delta, MX | daily low max | 12.8 C (55.0 F) | 5.0 C (9.0 F) | 58 years | 34 of 100 (Routine) |
| 19 November 2011 | Delta, MX | daily rain | 1.3 mm (0.05 in) | 1.3 mm (0.05 in) | 62 years | 20 of 100 (Routine) |
| 7 November 2011 | Delta, MX | daily low max (Tie) | 20.0 C (68.0 F) | tie | 16 years | 2 of 100 (Routine) |
| 4 November 2011 | Delta, MX | daily rain | 0.8 mm (0.03 in) | 0.8 mm (0.03 in) | 62 years | 20 of 100 (Routine) |
| 7 October 2011 | Delta, MX | daily low max | 26.1 C (79.0 F) | 2.8 C (5.0 F) | 4 years | 12 of 100 (Routine) |
| 12 September 2011 | Delta, MX | daily rain | 13.0 mm (0.5 in) | 3.1 mm (0.12 in) | 52 years | 20 of 100 (Routine) |
Climate Trend
46 complete years, 1949 to 2011| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1949 | 22.7 C | -0.20 C |
| 1950 | 25.0 C | +2.07 C |
| 1951 | 21.4 C | -1.56 C |
| 1952 | 21.9 C | -1.01 C |
| 1953 | 24.1 C | +1.16 C |
| 1954 | 22.2 C | -0.70 C |
| 1955 | 21.5 C | -1.46 C |
| 1957 | 22.0 C | -0.90 C |
| 1958 | 21.9 C | -1.02 C |
| 1959 | 24.1 C | +1.17 C |
| 1960 | 22.7 C | -0.24 C |
| 1961 | 23.1 C | +0.21 C |
| 1962 | 23.5 C | +0.54 C |
| 1964 | 22.6 C | -0.31 C |
| 1965 | 22.8 C | -0.14 C |
| 1966 | 25.0 C | +2.08 C |
| 1968 | 22.8 C | -0.14 C |
| 1969 | 23.2 C | +0.31 C |
| 1970 | 22.9 C | +0.01 C |
| 1971 | 22.3 C | -0.65 C |
| 1972 | 23.0 C | +0.05 C |
| 1973 | 22.5 C | -0.45 C |
| 1974 | 23.1 C | +0.14 C |
| 1975 | 22.3 C | -0.59 C |
| 1976 | 22.8 C | -0.10 C |
| 1979 | 23.7 C | +0.74 C |
| 1980 | 24.4 C | +1.46 C |
| 1981 | 24.8 C | +1.91 C |
| 1982 | 23.7 C | +0.78 C |
| 1983 | 23.9 C | +1.02 C |
| 1985 | 21.8 C | -1.11 C |
| 1986 | 22.2 C | -0.75 C |
| 1987 | 22.1 C | -0.81 C |
| 1988 | 22.8 C | -0.13 C |
| 1996 | 23.7 C | +0.73 C |
| 1998 | 22.4 C | -0.54 C |
| 1999 | 22.7 C | -0.20 C |
| 2000 | 22.8 C | -0.14 C |
| 2003 | 23.2 C | +0.29 C |
| 2004 | 22.7 C | -0.27 C |
| 2005 | 23.2 C | +0.29 C |
| 2006 | 22.8 C | -0.12 C |
| 2007 | 22.8 C | -0.15 C |
| 2009 | 23.0 C | +0.04 C |
| 2010 | 22.3 C | -0.63 C |
| 2011 | 22.3 C | -0.59 C |
The fitted trend in annual mean temperature here over 1949 to 2011 is -0.01 C (-0.14 to 0.13) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.26 to 0.23) per decade. The slope is a straight line fitted to 46 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.01 C (-0.14 to 0.13) per decade | -0.01 F (-0.26 to 0.23) per decade | 1949 to 2011 | 46 | Not clearly different from zero |
| Mean daily maximum | -0.1 C (-0.3 to 0.2) per decade | -0.1 F (-0.5 to 0.3) per decade | 1949 to 2011 | 46 | Not clearly different from zero |
| Mean daily minimum | 0.04 C (-0.18 to 0.26) per decade | 0.1 F (-0.3 to 0.5) per decade | 1949 to 2011 | 46 | 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
1948 to 2012| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 56.7 C (134.1 F) | 1953 | 48.9 C (120.0 F) | 65 |
| Coldest night (TNn) | -6.1 C (21.0 F) | 2007 | 0.0 C (32.0 F) | 65 |
| Wettest day (Rx1day) | 63.0 mm (2.5 in) | 1972 | 10.4 mm (0.4 in) | 65 |
| Wettest five days (Rx5day) | 105.9 mm (4.2 in) | 1972 | 12.7 mm (0.5 in) | 65 |
| Longest dry spell (CDD) | 365 days | 1961 | 162 days | 65 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1948 | 55.0 C (131.0 F) |
| 1949 | 51.7 C (125.1 F) |
| 1950 | 51.7 C (125.1 F) |
| 1951 | 46.7 C (116.1 F) |
| 1952 | 45.0 C (113.0 F) |
| 1953 | 56.7 C (134.1 F) |
| 1954 | 47.8 C (118.0 F) |
| 1955 | 48.9 C (120.0 F) |
| 1956 | 53.9 C (129.0 F) |
| 1957 | 47.8 C (118.0 F) |
| 1958 | 47.8 C (118.0 F) |
| 1959 | 47.8 C (118.0 F) |
| 1960 | 46.7 C (116.1 F) |
| 1961 | 47.8 C (118.0 F) |
| 1962 | 45.6 C (114.1 F) |
| 1963 | 45.0 C (113.0 F) |
| 1964 | 47.8 C (118.0 F) |
| 1965 | 46.7 C (116.1 F) |
| 1966 | 55.0 C (131.0 F) |
| 1967 | 46.7 C (116.1 F) |
| 1968 | 48.3 C (118.9 F) |
| 1969 | 47.8 C (118.0 F) |
| 1970 | 47.8 C (118.0 F) |
| 1971 | 45.6 C (114.1 F) |
| 1972 | 48.9 C (120.0 F) |
| 1973 | 48.9 C (120.0 F) |
| 1974 | 48.9 C (120.0 F) |
| 1975 | 47.8 C (118.0 F) |
| 1976 | 48.9 C (120.0 F) |
| 1977 | 48.9 C (120.0 F) |
| 1978 | 48.9 C (120.0 F) |
| 1979 | 45.6 C (114.1 F) |
| 1980 | 46.7 C (116.1 F) |
| 1981 | 47.8 C (118.0 F) |
| 1982 | 45.6 C (114.1 F) |
| 1983 | 46.1 C (115.0 F) |
| 1984 | 49.4 C (120.9 F) |
| 1985 | 50.6 C (123.1 F) |
| 1986 | 50.0 C (122.0 F) |
| 1987 | 48.3 C (118.9 F) |
| 1988 | 49.4 C (120.9 F) |
| 1989 | 47.8 C (118.0 F) |
| 1990 | 50.0 C (122.0 F) |
| 1991 | 50.6 C (123.1 F) |
| 1992 | 50.0 C (122.0 F) |
| 1993 | 40.6 C (105.1 F) |
| 1994 | 40.0 C (104.0 F) |
| 1995 | 51.7 C (125.1 F) |
| 1996 | 50.6 C (123.1 F) |
| 1997 | 50.0 C (122.0 F) |
| 1998 | 53.9 C (129.0 F) |
| 1999 | 48.3 C (118.9 F) |
| 2000 | 50.0 C (122.0 F) |
| 2001 | 48.9 C (120.0 F) |
| 2002 | 48.9 C (120.0 F) |
| 2003 | 50.0 C (122.0 F) |
| 2004 | 48.3 C (118.9 F) |
| 2005 | 50.0 C (122.0 F) |
| 2006 | 48.9 C (120.0 F) |
| 2007 | 47.8 C (118.0 F) |
| 2008 | 49.4 C (120.9 F) |
| 2009 | 50.0 C (122.0 F) |
| 2010 | 47.2 C (117.0 F) |
| 2011 | 49.4 C (120.9 F) |
| 2012 | 48.9 C (120.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1948 | -2.2 C (28.0 F) |
| 1949 | 0.0 C (32.0 F) |
| 1950 | -1.1 C (30.0 F) |
| 1951 | -2.2 C (28.0 F) |
| 1952 | 0.0 C (32.0 F) |
| 1953 | 0.0 C (32.0 F) |
| 1954 | 0.0 C (32.0 F) |
| 1955 | 0.0 C (32.0 F) |
| 1956 | 0.0 C (32.0 F) |
| 1957 | 1.7 C (35.1 F) |
| 1958 | 0.0 C (32.0 F) |
| 1959 | 0.0 C (32.0 F) |
| 1960 | 0.0 C (32.0 F) |
| 1961 | 0.6 C (33.1 F) |
| 1962 | 0.0 C (32.0 F) |
| 1963 | 0.6 C (33.1 F) |
| 1964 | -3.3 C (26.1 F) |
| 1965 | 0.0 C (32.0 F) |
| 1966 | -2.2 C (28.0 F) |
| 1967 | 0.0 C (32.0 F) |
| 1968 | 0.0 C (32.0 F) |
| 1969 | 0.0 C (32.0 F) |
| 1970 | -2.2 C (28.0 F) |
| 1971 | -3.3 C (26.1 F) |
| 1972 | -2.2 C (28.0 F) |
| 1973 | -1.1 C (30.0 F) |
| 1974 | -1.1 C (30.0 F) |
| 1975 | -1.1 C (30.0 F) |
| 1976 | -3.3 C (26.1 F) |
| 1977 | 0.6 C (33.1 F) |
| 1978 | 1.7 C (35.1 F) |
| 1979 | 2.2 C (36.0 F) |
| 1980 | 5.0 C (41.0 F) |
| 1981 | 4.4 C (39.9 F) |
| 1982 | 3.9 C (39.0 F) |
| 1983 | 3.3 C (37.9 F) |
| 1984 | 1.7 C (35.1 F) |
| 1985 | 0.6 C (33.1 F) |
| 1986 | 0.0 C (32.0 F) |
| 1987 | -2.2 C (28.0 F) |
| 1988 | -3.3 C (26.1 F) |
| 1989 | 0.0 C (32.0 F) |
| 1990 | 0.6 C (33.1 F) |
| 1991 | 10.0 C (50.0 F) |
| 1992 | 5.0 C (41.0 F) |
| 1993 | 13.9 C (57.0 F) |
| 1994 | 0.0 C (32.0 F) |
| 1995 | 0.0 C (32.0 F) |
| 1996 | -3.3 C (26.1 F) |
| 1997 | -5.0 C (23.0 F) |
| 1998 | -3.3 C (26.1 F) |
| 1999 | -2.2 C (28.0 F) |
| 2000 | 0.0 C (32.0 F) |
| 2001 | 0.0 C (32.0 F) |
| 2002 | -2.2 C (28.0 F) |
| 2003 | -2.2 C (28.0 F) |
| 2004 | 0.0 C (32.0 F) |
| 2005 | -1.1 C (30.0 F) |
| 2006 | -2.2 C (28.0 F) |
| 2007 | -6.1 C (21.0 F) |
| 2008 | -1.1 C (30.0 F) |
| 2009 | 0.0 C (32.0 F) |
| 2010 | -3.3 C (26.1 F) |
| 2011 | -3.9 C (25.0 F) |
| 2012 | 1.1 C (34.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 27.9 mm (1.1 in) |
| 1949 | 24.9 mm (1.0 in) |
| 1950 | 4.8 mm (0.19 in) |
| 1951 | 10.9 mm (0.4 in) |
| 1952 | 11.9 mm (0.5 in) |
| 1953 | 9.9 mm (0.39 in) |
| 1954 | 1.8 mm (0.07 in) |
| 1955 | 16.8 mm (0.7 in) |
| 1956 | 5.8 mm (0.23 in) |
| 1957 | 8.9 mm (0.35 in) |
| 1958 | 9.9 mm (0.39 in) |
| 1959 | 16.8 mm (0.7 in) |
| 1960 | 7.9 mm (0.31 in) |
| 1961 | 0.0 mm (0.00 in) |
| 1962 | 0.0 mm (0.00 in) |
| 1963 | 0.0 mm (0.00 in) |
| 1964 | 0.0 mm (0.00 in) |
| 1965 | 0.0 mm (0.00 in) |
| 1966 | 0.0 mm (0.00 in) |
| 1967 | 0.0 mm (0.00 in) |
| 1968 | 0.0 mm (0.00 in) |
| 1969 | 7.9 mm (0.31 in) |
| 1970 | 17.8 mm (0.7 in) |
| 1971 | 18.8 mm (0.7 in) |
| 1972 | 63.0 mm (2.5 in) |
| 1973 | 7.9 mm (0.31 in) |
| 1974 | 15.0 mm (0.6 in) |
| 1975 | 9.4 mm (0.37 in) |
| 1976 | 38.4 mm (1.5 in) |
| 1977 | 14.0 mm (0.6 in) |
| 1978 | 37.3 mm (1.5 in) |
| 1979 | 45.0 mm (1.8 in) |
| 1980 | 5.1 mm (0.20 in) |
| 1981 | 30.5 mm (1.2 in) |
| 1982 | 43.9 mm (1.7 in) |
| 1983 | 40.4 mm (1.6 in) |
| 1984 | 13.0 mm (0.5 in) |
| 1985 | 11.7 mm (0.5 in) |
| 1986 | 7.9 mm (0.31 in) |
| 1987 | 6.4 mm (0.25 in) |
| 1988 | 9.9 mm (0.39 in) |
| 1989 | 7.9 mm (0.31 in) |
| 1990 | 11.4 mm (0.4 in) |
| 1991 | 0.0 mm (0.00 in) |
| 1992 | 24.9 mm (1.0 in) |
| 1993 | 3.3 mm (0.13 in) |
| 1994 | 1.3 mm (0.05 in) |
| 1995 | 0.8 mm (0.03 in) |
| 1996 | 10.9 mm (0.4 in) |
| 1997 | 18.8 mm (0.7 in) |
| 1998 | 7.4 mm (0.29 in) |
| 1999 | 16.3 mm (0.6 in) |
| 2000 | 7.4 mm (0.29 in) |
| 2001 | 15.0 mm (0.6 in) |
| 2002 | 3.3 mm (0.13 in) |
| 2003 | 13.0 mm (0.5 in) |
| 2004 | 20.3 mm (0.8 in) |
| 2005 | 10.4 mm (0.4 in) |
| 2006 | 4.8 mm (0.19 in) |
| 2007 | 21.8 mm (0.9 in) |
| 2008 | 37.8 mm (1.5 in) |
| 2009 | 5.8 mm (0.23 in) |
| 2010 | 31.8 mm (1.3 in) |
| 2011 | 21.8 mm (0.9 in) |
| 2012 | 50.8 mm (2.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 35.8 mm (1.4 in) |
| 1949 | 39.9 mm (1.6 in) |
| 1950 | 4.8 mm (0.19 in) |
| 1951 | 25.6 mm (1.0 in) |
| 1952 | 11.9 mm (0.5 in) |
| 1953 | 9.9 mm (0.39 in) |
| 1954 | 2.1 mm (0.08 in) |
| 1955 | 23.6 mm (0.9 in) |
| 1956 | 5.8 mm (0.23 in) |
| 1957 | 12.7 mm (0.5 in) |
| 1958 | 13.7 mm (0.5 in) |
| 1959 | 29.8 mm (1.2 in) |
| 1960 | 8.7 mm (0.34 in) |
| 1961 | 0.0 mm (0.00 in) |
| 1962 | 0.0 mm (0.00 in) |
| 1963 | 0.0 mm (0.00 in) |
| 1964 | 0.0 mm (0.00 in) |
| 1965 | 0.0 mm (0.00 in) |
| 1966 | 0.0 mm (0.00 in) |
| 1967 | 0.0 mm (0.00 in) |
| 1968 | 0.0 mm (0.00 in) |
| 1969 | 7.9 mm (0.31 in) |
| 1970 | 18.8 mm (0.7 in) |
| 1971 | 19.6 mm (0.8 in) |
| 1972 | 105.9 mm (4.2 in) |
| 1973 | 10.7 mm (0.4 in) |
| 1974 | 17.3 mm (0.7 in) |
| 1975 | 12.7 mm (0.5 in) |
| 1976 | 71.9 mm (2.8 in) |
| 1977 | 31.3 mm (1.2 in) |
| 1978 | 62.9 mm (2.5 in) |
| 1979 | 46.3 mm (1.8 in) |
| 1980 | 10.9 mm (0.4 in) |
| 1981 | 30.5 mm (1.2 in) |
| 1982 | 58.9 mm (2.3 in) |
| 1983 | 61.5 mm (2.4 in) |
| 1984 | 21.6 mm (0.9 in) |
| 1985 | 12.7 mm (0.5 in) |
| 1986 | 7.9 mm (0.31 in) |
| 1987 | 11.5 mm (0.5 in) |
| 1988 | 16.8 mm (0.7 in) |
| 1989 | 7.9 mm (0.31 in) |
| 1990 | 14.7 mm (0.6 in) |
| 1991 | 0.0 mm (0.00 in) |
| 1992 | 44.7 mm (1.8 in) |
| 1993 | 3.3 mm (0.13 in) |
| 1994 | 1.8 mm (0.07 in) |
| 1995 | 0.8 mm (0.03 in) |
| 1996 | 10.9 mm (0.4 in) |
| 1997 | 18.8 mm (0.7 in) |
| 1998 | 7.4 mm (0.29 in) |
| 1999 | 16.3 mm (0.6 in) |
| 2000 | 7.4 mm (0.29 in) |
| 2001 | 21.4 mm (0.8 in) |
| 2002 | 3.6 mm (0.14 in) |
| 2003 | 14.8 mm (0.6 in) |
| 2004 | 20.3 mm (0.8 in) |
| 2005 | 15.2 mm (0.6 in) |
| 2006 | 7.6 mm (0.30 in) |
| 2007 | 21.8 mm (0.9 in) |
| 2008 | 37.8 mm (1.5 in) |
| 2009 | 7.6 mm (0.30 in) |
| 2010 | 67.4 mm (2.7 in) |
| 2011 | 24.1 mm (0.9 in) |
| 2012 | 50.8 mm (2.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 102 days |
| 1949 | 317 days |
| 1950 | 249 days |
| 1951 | 237 days |
| 1952 | 215 days |
| 1953 | 305 days |
| 1954 | 285 days |
| 1955 | 166 days |
| 1956 | 128 days |
| 1957 | 152 days |
| 1958 | 157 days |
| 1959 | 138 days |
| 1960 | 117 days |
| 1961 | 365 days |
| 1962 | 365 days |
| 1963 | 365 days |
| 1964 | 306 days |
| 1965 | 365 days |
| 1966 | 365 days |
| 1967 | 365 days |
| 1968 | 306 days |
| 1969 | 246 days |
| 1970 | 158 days |
| 1971 | 107 days |
| 1972 | 155 days |
| 1973 | 160 days |
| 1974 | 202 days |
| 1975 | 149 days |
| 1976 | 148 days |
| 1977 | 113 days |
| 1978 | 151 days |
| 1979 | 92 days |
| 1980 | 247 days |
| 1981 | 160 days |
| 1982 | 133 days |
| 1983 | 153 days |
| 1984 | 190 days |
| 1985 | 224 days |
| 1986 | 252 days |
| 1987 | 302 days |
| 1988 | 131 days |
| 1989 | 148 days |
| 1990 | 102 days |
| 1991 | 105 days |
| 1992 | 130 days |
| 1993 | 75 days |
| 1994 | 292 days |
| 1995 | 187 days |
| 1996 | 165 days |
| 1997 | 67 days |
| 1998 | 176 days |
| 1999 | 104 days |
| 2000 | 210 days |
| 2001 | 147 days |
| 2002 | 161 days |
| 2003 | 259 days |
| 2004 | 200 days |
| 2005 | 76 days |
| 2006 | 163 days |
| 2007 | 162 days |
| 2008 | 213 days |
| 2009 | 327 days |
| 2010 | 162 days |
| 2011 | 112 days |
| 2012 | 69 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
21 years with a frostAcross 21 years with a frost, the median last spring frost at Delta falls on 13 February and the median first autumn frost on 11 December, which leaves a median of 306 days between them.
| Measure | Median, all years | Earliest period | Recent period (1949 to 2011) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 13 February | n/a | 13 February | n/a | n/a |
| First autumn frost | 11 December | n/a | 11 December | n/a | n/a |
| Growing days | 306 days | n/a | 306 days | n/a | n/a |
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
55 years, 1949 to 2011A day with at least 10.8 mm (0.4 in) of rain is expected about once in 2 years. A day with at least 70.6 mm (2.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 10.8 mm (0.4 in) | |
| 5 years | 22.3 mm (0.9 in) | |
| 10 years | 31.4 mm (1.2 in) | |
| 25 years | 45.1 mm (1.8 in) | |
| 50 years | 57.0 mm (2.2 in) | |
| 100 years | 70.6 mm (2.8 in) | Longer than the 55 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, 55 years of values from 1949 to 2011.
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: 63.0 mm (2.5 in) in 1972; 45.0 mm (1.8 in) in 1979; 43.9 mm (1.7 in) in 1982.
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 (2025-12-31).