Ejido Ignacio Lopez Rayon Weather Records (MXN00002091)
Record envelope, standing records and threshold days for Ejido Ignacio Lopez Rayon (MXN00002091), Mexico, with 39 years of record.
Key Facts for Ejido Ignacio Lopez Rayon
- Ejido Ignacio Lopez Rayon (MXN00002091) is a weather station in Mexico at 31.28 latitude and -116.25 longitude, 170 m (557 ft) above sea level.
- The station reports from 1974 to 2012, 39 years of record.
- 1,464 records set at Ejido Ignacio Lopez Rayon still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Ejido Ignacio Lopez Rayon tied a monthly record low maximum temperature of 11.7 C (53.1 F) on 16 November 2012.
About the Station
- Location: Mexico, 31.28 latitude, -116.25 longitude.
- Elevation: 170 m (557 ft).
- Period of record: 1974 to 2012, 39 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 | 31.7 C (89.1 F) | -5.0 C (23.0 F) | n/a | n/a |
| Feb | 33.9 C (93.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Mar | 35.6 C (96.1 F) | -2.2 C (28.0 F) | n/a | n/a |
| Apr | 42.8 C (109.0 F) | -1.1 C (30.0 F) | n/a | n/a |
| May | 38.9 C (102.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jun | 45.0 C (113.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Jul | 45.0 C (113.0 F) | 5.0 C (41.0 F) | n/a | n/a |
| Aug | 43.9 C (111.0 F) | 2.8 C (37.0 F) | n/a | n/a |
| Sep | 43.9 C (111.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Oct | 42.8 C (109.0 F) | -2.2 C (28.0 F) | n/a | n/a |
| Nov | 36.7 C (98.1 F) | -4.4 C (24.1 F) | n/a | n/a |
| Dec | 31.7 C (89.1 F) | -6.1 C (21.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1974 | 46 |
| 1975 | 58 |
| 1976 | 81 |
| 1977 | 61 |
| 1978 | 69 |
| 1979 | 54 |
| 1980 | 67 |
| 1981 | 37 |
| 1982 | 46 |
| 1983 | 43 |
| 1984 | 64 |
| 1985 | 33 |
| 1986 | 25 |
| 1987 | 20 |
| 1988 | 21 |
| 1989 | 35 |
| 1990 | 43 |
| 1991 | 33 |
| 1992 | 26 |
| 1993 | 13 |
| 1994 | 43 |
| 1995 | 17 |
| 1996 | 34 |
| 1997 | 35 |
| 1998 | 20 |
| 1999 | 37 |
| 2000 | 28 |
| 2001 | 33 |
| 2002 | 40 |
| 2003 | 33 |
| 2004 | 15 |
| 2005 | 22 |
| 2006 | 18 |
| 2007 | 26 |
| 2008 | 59 |
| 2009 | 36 |
| 2010 | 47 |
| 2011 | 35 |
| 2012 | 11 |
Wettest Day of Each Month
Sep: 84.8 mm (3.3 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 78.0 mm (3.1 in) | 24 January 1995 |
| Feb | 69.9 mm (2.8 in) | 3 February 1998 |
| Mar | 64.8 mm (2.6 in) | 2 March 1983 |
| Apr | 64.8 mm (2.6 in) | 3 April 1997 |
| May | 14.0 mm (0.6 in) | 8 May 1977 |
| Jun | 34.8 mm (1.4 in) | 5 June 1993 |
| Jul | 4.8 mm (0.19 in) | 23 July 2005 |
| Aug | 24.9 mm (1.0 in) | 16 August 1977 |
| Sep | 84.8 mm (3.3 in) | 25 September 1997 |
| Oct | 67.3 mm (2.6 in) | 20 October 2004 |
| Nov | 54.9 mm (2.2 in) | 11 November 1993 |
| Dec | 52.8 mm (2.1 in) | 7 December 1992 |
Period of Record Coverage
1974 to 2012| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1974 | 238 | 65% | No |
| 1975 | 364 | 100% | Yes |
| 1976 | 358 | 98% | Yes |
| 1977 | 363 | 99% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 363 | 99% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 298 | 82% | No |
| 1988 | 366 | 100% | Yes |
| 1989 | 330 | 90% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 363 | 99% | Yes |
| 1993 | 363 | 99% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 363 | 99% | Yes |
| 1996 | 363 | 99% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 362 | 99% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 364 | 99% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 357 | 98% | Yes |
| 2005 | 330 | 90% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 334 | 91% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 354 | 97% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 122 | 33% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 16 November 2012 | Ejido Ignacio Lopez Rayon, MX | monthly low max (Tie) | 11.7 C (53.1 F) | tie | 27 years | 5 of 100 (Routine) |
| 11 November 2012 | Ejido Ignacio Lopez Rayon, MX | daily low max (Tie) | 13.9 C (57.0 F) | tie | 34 years | 3 of 100 (Routine) |
| 11 November 2012 | Ejido Ignacio Lopez Rayon, MX | daily low min (Tie) | 0.6 C (33.1 F) | tie | 6 years | 1 of 100 (Routine) |
| 10 November 2012 | Ejido Ignacio Lopez Rayon, MX | daily low max | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 34 years | 14 of 100 (Routine) |
| 23 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily low max | 16.7 C (62.1 F) | 2.2 C (4.0 F) | 37 years | 18 of 100 (Routine) |
| 21 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily high min (Tie) | 13.9 C (57.0 F) | tie | 36 years | 3 of 100 (Routine) |
| 20 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily high min (Tie) | 15.0 C (59.0 F) | tie | 36 years | 3 of 100 (Routine) |
| 19 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily high min (Tie) | 11.7 C (53.1 F) | tie | 29 years | 2 of 100 (Routine) |
| 18 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily high min | 15.6 C (60.1 F) | 2.8 C (5.0 F) | 38 years | 23 of 100 (Routine) |
| 16 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily high min | 17.8 C (64.0 F) | 2.8 C (5.0 F) | 38 years | 23 of 100 (Routine) |
| 13 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily low max (Tie) | 20.0 C (68.0 F) | tie | 5 years | 1 of 100 (Routine) |
| 11 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily low max | 20.0 C (68.0 F) | 0.6 C (1.1 F) | 38 years | 15 of 100 (Routine) |
| 10 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily rain | 8.4 mm (0.33 in) | 5.6 mm (0.22 in) | 25 years | 14 of 100 (Routine) |
| 2 October 2012 | Ejido Ignacio Lopez Rayon, MX | daily low min | 0.6 C (33.1 F) | 3.3 C (5.9 F) | 30 years | 23 of 100 (Routine) |
| 27 September 2012 | Ejido Ignacio Lopez Rayon, MX | daily low min (Tie) | 6.7 C (44.1 F) | tie | 6 years | 1 of 100 (Routine) |
| 14 September 2012 | Ejido Ignacio Lopez Rayon, MX | daily high min (Tie) | 15.6 C (60.1 F) | tie | 36 years | 3 of 100 (Routine) |
| 12 September 2012 | Ejido Ignacio Lopez Rayon, MX | daily high min | 16.7 C (62.1 F) | 1.1 C (2.0 F) | 28 years | 14 of 100 (Routine) |
| 30 August 2012 | Ejido Ignacio Lopez Rayon, MX | daily low max | 20.6 C (69.1 F) | 2.2 C (4.0 F) | 12 years | 11 of 100 (Routine) |
| 25 August 2012 | Ejido Ignacio Lopez Rayon, MX | daily low max | 20.6 C (69.1 F) | 3.3 C (5.9 F) | 30 years | 19 of 100 (Routine) |
| 24 August 2012 | Ejido Ignacio Lopez Rayon, MX | daily low max | 21.7 C (71.1 F) | 3.3 C (5.9 F) | 25 years | 17 of 100 (Routine) |
Climate Trend
33 complete years, 1975 to 2011| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1975 | 15.4 C | -0.40 C |
| 1976 | 16.5 C | +0.76 C |
| 1977 | 16.4 C | +0.62 C |
| 1978 | 16.6 C | +0.85 C |
| 1979 | 16.9 C | +1.13 C |
| 1980 | 17.1 C | +1.28 C |
| 1981 | 17.2 C | +1.39 C |
| 1982 | 15.7 C | -0.06 C |
| 1983 | 15.8 C | +0.02 C |
| 1984 | 15.7 C | -0.06 C |
| 1985 | 15.9 C | +0.08 C |
| 1986 | 16.5 C | +0.71 C |
| 1988 | 16.0 C | +0.22 C |
| 1990 | 16.1 C | +0.32 C |
| 1991 | 15.7 C | -0.12 C |
| 1992 | 16.9 C | +1.16 C |
| 1993 | 16.1 C | +0.29 C |
| 1994 | 15.8 C | +0.05 C |
| 1995 | 16.3 C | +0.53 C |
| 1996 | 16.5 C | +0.67 C |
| 1997 | 16.1 C | +0.27 C |
| 1998 | 15.2 C | -0.59 C |
| 1999 | 15.5 C | -0.25 C |
| 2000 | 15.4 C | -0.36 C |
| 2001 | 14.9 C | -0.90 C |
| 2002 | 14.7 C | -1.06 C |
| 2003 | 15.3 C | -0.52 C |
| 2004 | 15.0 C | -0.83 C |
| 2006 | 15.4 C | -0.39 C |
| 2007 | 14.8 C | -1.00 C |
| 2009 | 15.0 C | -0.82 C |
| 2010 | 14.4 C | -1.41 C |
| 2011 | 14.3 C | -1.52 C |
The annual mean temperature here has fallen by 0.5 C (0.4 to 0.7) per decade over 1975 to 2011. In Fahrenheit: 1.0 F (0.7 to 1.3) per decade. The slope is a straight line fitted to 33 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 (-0.7 to -0.4) per decade | -1.0 F (-1.3 to -0.7) per decade | 1975 to 2011 | 33 | Fall |
| Mean daily maximum | -0.3 C (-0.6 to -0.1) per decade | -0.6 F (-1.1 to -0.1) per decade | 1975 to 2011 | 33 | Fall |
| Mean daily minimum | -0.7 C (-0.9 to -0.6) per decade | -1.3 F (-1.6 to -1.0) per decade | 1975 to 2011 | 33 | Fall |
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
1974 to 2012| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.0 C (113.0 F) | 1979 | 41.7 C (107.1 F) | 39 |
| Coldest night (TNn) | -6.1 C (21.0 F) | 1987 | -3.3 C (26.1 F) | 39 |
| Wettest day (Rx1day) | 84.8 mm (3.3 in) | 1997 | 35.8 mm (1.4 in) | 39 |
| Wettest five days (Rx5day) | 182.5 mm (7.2 in) | 2010 | 64.4 mm (2.5 in) | 39 |
| Longest dry spell (CDD) | 234 days | 2002 | 141 days | 39 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1974 | 42.8 C (109.0 F) |
| 1975 | 41.7 C (107.1 F) |
| 1976 | 42.8 C (109.0 F) |
| 1977 | 42.8 C (109.0 F) |
| 1978 | 43.9 C (111.0 F) |
| 1979 | 45.0 C (113.0 F) |
| 1980 | 43.9 C (111.0 F) |
| 1981 | 42.8 C (109.0 F) |
| 1982 | 42.8 C (109.0 F) |
| 1983 | 38.9 C (102.0 F) |
| 1984 | 41.7 C (107.1 F) |
| 1985 | 45.0 C (113.0 F) |
| 1986 | 38.9 C (102.0 F) |
| 1987 | 40.0 C (104.0 F) |
| 1988 | 42.8 C (109.0 F) |
| 1989 | 40.0 C (104.0 F) |
| 1990 | 45.0 C (113.0 F) |
| 1991 | 42.8 C (109.0 F) |
| 1992 | 42.8 C (109.0 F) |
| 1993 | 41.7 C (107.1 F) |
| 1994 | 41.7 C (107.1 F) |
| 1995 | 38.9 C (102.0 F) |
| 1996 | 41.7 C (107.1 F) |
| 1997 | 40.0 C (104.0 F) |
| 1998 | 41.7 C (107.1 F) |
| 1999 | 41.7 C (107.1 F) |
| 2000 | 37.8 C (100.0 F) |
| 2001 | 41.7 C (107.1 F) |
| 2002 | 37.8 C (100.0 F) |
| 2003 | 40.6 C (105.1 F) |
| 2004 | 38.9 C (102.0 F) |
| 2005 | 40.0 C (104.0 F) |
| 2006 | 38.9 C (102.0 F) |
| 2007 | 38.9 C (102.0 F) |
| 2008 | 38.9 C (102.0 F) |
| 2009 | 42.8 C (109.0 F) |
| 2010 | 41.7 C (107.1 F) |
| 2011 | 40.0 C (104.0 F) |
| 2012 | 36.7 C (98.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1974 | 1.7 C (35.1 F) |
| 1975 | -2.2 C (28.0 F) |
| 1976 | -3.3 C (26.1 F) |
| 1977 | -2.2 C (28.0 F) |
| 1978 | -2.2 C (28.0 F) |
| 1979 | -2.2 C (28.0 F) |
| 1980 | 0.0 C (32.0 F) |
| 1981 | 0.0 C (32.0 F) |
| 1982 | -2.2 C (28.0 F) |
| 1983 | -3.3 C (26.1 F) |
| 1984 | -3.3 C (26.1 F) |
| 1985 | -3.3 C (26.1 F) |
| 1986 | -4.4 C (24.1 F) |
| 1987 | -6.1 C (21.0 F) |
| 1988 | -4.4 C (24.1 F) |
| 1989 | -5.0 C (23.0 F) |
| 1990 | -4.4 C (24.1 F) |
| 1991 | -4.4 C (24.1 F) |
| 1992 | -2.2 C (28.0 F) |
| 1993 | -2.2 C (28.0 F) |
| 1994 | -5.0 C (23.0 F) |
| 1995 | -3.3 C (26.1 F) |
| 1996 | -5.0 C (23.0 F) |
| 1997 | -5.0 C (23.0 F) |
| 1998 | -3.3 C (26.1 F) |
| 1999 | -1.7 C (28.9 F) |
| 2000 | -4.4 C (24.1 F) |
| 2001 | -4.4 C (24.1 F) |
| 2002 | -4.4 C (24.1 F) |
| 2003 | -3.3 C (26.1 F) |
| 2004 | 0.0 C (32.0 F) |
| 2005 | -4.4 C (24.1 F) |
| 2006 | 0.0 C (32.0 F) |
| 2007 | 0.0 C (32.0 F) |
| 2008 | 0.0 C (32.0 F) |
| 2009 | -3.3 C (26.1 F) |
| 2010 | -3.3 C (26.1 F) |
| 2011 | -4.4 C (24.1 F) |
| 2012 | 0.0 C (32.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1974 | 9.9 mm (0.39 in) |
| 1975 | 26.9 mm (1.1 in) |
| 1976 | 43.4 mm (1.7 in) |
| 1977 | 24.9 mm (1.0 in) |
| 1978 | 66.8 mm (2.6 in) |
| 1979 | 43.9 mm (1.7 in) |
| 1980 | 52.8 mm (2.1 in) |
| 1981 | 40.9 mm (1.6 in) |
| 1982 | 36.8 mm (1.4 in) |
| 1983 | 64.8 mm (2.6 in) |
| 1984 | 42.9 mm (1.7 in) |
| 1985 | 34.8 mm (1.4 in) |
| 1986 | 30.0 mm (1.2 in) |
| 1987 | 49.8 mm (2.0 in) |
| 1988 | 33.8 mm (1.3 in) |
| 1989 | 19.8 mm (0.8 in) |
| 1990 | 19.8 mm (0.8 in) |
| 1991 | 46.0 mm (1.8 in) |
| 1992 | 59.9 mm (2.4 in) |
| 1993 | 68.8 mm (2.7 in) |
| 1994 | 25.9 mm (1.0 in) |
| 1995 | 78.0 mm (3.1 in) |
| 1996 | 32.8 mm (1.3 in) |
| 1997 | 84.8 mm (3.3 in) |
| 1998 | 69.9 mm (2.8 in) |
| 1999 | 35.8 mm (1.4 in) |
| 2000 | 32.8 mm (1.3 in) |
| 2001 | 31.0 mm (1.2 in) |
| 2002 | 24.9 mm (1.0 in) |
| 2003 | 30.0 mm (1.2 in) |
| 2004 | 67.3 mm (2.6 in) |
| 2005 | 47.8 mm (1.9 in) |
| 2006 | 21.8 mm (0.9 in) |
| 2007 | 13.0 mm (0.5 in) |
| 2008 | 31.0 mm (1.2 in) |
| 2009 | 31.0 mm (1.2 in) |
| 2010 | 69.9 mm (2.8 in) |
| 2011 | 39.9 mm (1.6 in) |
| 2012 | 8.4 mm (0.33 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1974 | 17.5 mm (0.7 in) |
| 1975 | 59.4 mm (2.3 in) |
| 1976 | 123.0 mm (4.8 in) |
| 1977 | 74.2 mm (2.9 in) |
| 1978 | 118.3 mm (4.7 in) |
| 1979 | 64.4 mm (2.5 in) |
| 1980 | 136.4 mm (5.4 in) |
| 1981 | 84.3 mm (3.3 in) |
| 1982 | 66.5 mm (2.6 in) |
| 1983 | 130.6 mm (5.1 in) |
| 1984 | 81.8 mm (3.2 in) |
| 1985 | 37.1 mm (1.5 in) |
| 1986 | 40.6 mm (1.6 in) |
| 1987 | 79.8 mm (3.1 in) |
| 1988 | 33.8 mm (1.3 in) |
| 1989 | 25.6 mm (1.0 in) |
| 1990 | 42.0 mm (1.7 in) |
| 1991 | 104.1 mm (4.1 in) |
| 1992 | 71.6 mm (2.8 in) |
| 1993 | 152.2 mm (6.0 in) |
| 1994 | 42.7 mm (1.7 in) |
| 1995 | 86.9 mm (3.4 in) |
| 1996 | 50.1 mm (2.0 in) |
| 1997 | 159.7 mm (6.3 in) |
| 1998 | 109.6 mm (4.3 in) |
| 1999 | 40.4 mm (1.6 in) |
| 2000 | 48.3 mm (1.9 in) |
| 2001 | 59.5 mm (2.3 in) |
| 2002 | 31.5 mm (1.2 in) |
| 2003 | 50.8 mm (2.0 in) |
| 2004 | 98.8 mm (3.9 in) |
| 2005 | 73.5 mm (2.9 in) |
| 2006 | 31.5 mm (1.2 in) |
| 2007 | 18.8 mm (0.7 in) |
| 2008 | 65.8 mm (2.6 in) |
| 2009 | 35.4 mm (1.4 in) |
| 2010 | 182.5 mm (7.2 in) |
| 2011 | 56.7 mm (2.2 in) |
| 2012 | 8.4 mm (0.33 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1974 | 204 days |
| 1975 | 192 days |
| 1976 | 124 days |
| 1977 | 127 days |
| 1978 | 208 days |
| 1979 | 205 days |
| 1980 | 104 days |
| 1981 | 167 days |
| 1982 | 145 days |
| 1983 | 141 days |
| 1984 | 111 days |
| 1985 | 173 days |
| 1986 | 83 days |
| 1987 | 90 days |
| 1988 | 135 days |
| 1989 | 209 days |
| 1990 | 163 days |
| 1991 | 176 days |
| 1992 | 124 days |
| 1993 | 132 days |
| 1994 | 160 days |
| 1995 | 170 days |
| 1996 | 225 days |
| 1997 | 109 days |
| 1998 | 90 days |
| 1999 | 213 days |
| 2000 | 89 days |
| 2001 | 205 days |
| 2002 | 234 days |
| 2003 | 115 days |
| 2004 | 108 days |
| 2005 | 84 days |
| 2006 | 90 days |
| 2007 | 151 days |
| 2008 | 122 days |
| 2009 | 152 days |
| 2010 | 161 days |
| 2011 | 139 days |
| 2012 | 39 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
29 years with a frostAcross 29 years with a frost, the median last spring frost at Ejido Ignacio Lopez Rayon falls on 2 March and the median first autumn frost on 26 November, which leaves a median of 259 days between them.
Fitted over all years, the growing season changes by -19.1 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1975 to 2011) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 2 March | n/a | 2 March | n/a | +11.8 days per decade |
| First autumn frost | 26 November | n/a | 26 November | n/a | -7.3 days per decade |
| Growing days | 259 days | n/a | 259 days | n/a | -19.1 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
36 years, 1975 to 2011A day with at least 38.9 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 105.2 mm (4.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 38.9 mm (1.5 in) | |
| 5 years | 55.9 mm (2.2 in) | |
| 10 years | 67.5 mm (2.7 in) | |
| 25 years | 82.4 mm (3.2 in) | |
| 50 years | 93.7 mm (3.7 in) | Longer than the 36 years of record |
| 100 years | 105.2 mm (4.1 in) | Longer than the 36 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, 36 years of values from 1975 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: 84.8 mm (3.3 in) in 1997; 78.0 mm (3.1 in) in 1995; 69.9 mm (2.8 in) in 1998.
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 (2025-12-31).