Ojos Negros Weather Records (MXN00002035)
Record envelope, standing records and threshold days for Ojos Negros (MXN00002035), Mexico, with 43 years of record.
Key Facts for Ojos Negros
- Ojos Negros (MXN00002035) is a weather station in Mexico at 31.90 latitude and -116.25 longitude, 680 m (2,230 ft) above sea level.
- The station reports from 1948 to 1990, 43 years of record.
- 1,464 records set at Ojos Negros still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Ojos Negros tied a daily record high minimum temperature of 15.0 C (59.0 F) on 20 October 1990.
About the Station
- Location: Mexico, 31.90 latitude, -116.25 longitude.
- Elevation: 680 m (2,230 ft).
- Period of record: 1948 to 1990, 43 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 | 41.7 C (107.1 F) | -14.4 C (6.1 F) | n/a | n/a |
| Feb | 40.0 C (104.0 F) | -11.1 C (12.0 F) | n/a | n/a |
| Mar | 40.6 C (105.1 F) | -11.1 C (12.0 F) | n/a | n/a |
| Apr | 43.9 C (111.0 F) | -9.4 C (15.1 F) | n/a | n/a |
| May | 45.6 C (114.1 F) | -4.4 C (24.1 F) | n/a | n/a |
| Jun | 50.0 C (122.0 F) | -1.1 C (30.0 F) | n/a | n/a |
| Jul | 50.6 C (123.1 F) | 0.6 C (33.1 F) | n/a | n/a |
| Aug | 51.1 C (124.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Sep | 52.8 C (127.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Oct | 50.0 C (122.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Nov | 46.7 C (116.1 F) | -11.1 C (12.0 F) | n/a | n/a |
| Dec | 40.0 C (104.0 F) | -17.2 C (1.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1948 | 12 |
| 1949 | 23 |
| 1950 | 37 |
| 1951 | 34 |
| 1952 | 24 |
| 1953 | 46 |
| 1954 | 57 |
| 1955 | 84 |
| 1956 | 133 |
| 1957 | 60 |
| 1958 | 17 |
| 1959 | 72 |
| 1960 | 23 |
| 1961 | 16 |
| 1962 | 29 |
| 1963 | 50 |
| 1964 | 36 |
| 1965 | 49 |
| 1966 | 30 |
| 1967 | 46 |
| 1968 | 18 |
| 1969 | 51 |
| 1970 | 27 |
| 1971 | 54 |
| 1972 | 47 |
| 1973 | 41 |
| 1974 | 32 |
| 1975 | 43 |
| 1976 | 32 |
| 1977 | 28 |
| 1978 | 27 |
| 1979 | 24 |
| 1980 | 26 |
| 1981 | 11 |
| 1982 | 23 |
| 1983 | 20 |
| 1984 | 20 |
| 1985 | 13 |
| 1986 | 10 |
| 1987 | 26 |
| 1988 | 1 |
| 1989 | 3 |
| 1990 | 9 |
Wettest Day of Each Month
Aug: 84.8 mm (3.3 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 66.8 mm (2.6 in) | 29 January 1980 |
| Feb | 46.0 mm (1.8 in) | 17 February 1980 |
| Mar | 42.9 mm (1.7 in) | 10 March 1986 |
| Apr | 47.0 mm (1.9 in) | 21 April 1988 |
| May | 8.9 mm (0.35 in) | 5 May 1969 |
| Jun | 7.1 mm (0.28 in) | 9 June 1957 |
| Jul | 17.8 mm (0.7 in) | 21 July 1960 |
| Aug | 84.8 mm (3.3 in) | 16 August 1977 |
| Sep | 27.9 mm (1.1 in) | 28 September 1960 |
| Oct | 19.8 mm (0.8 in) | 28 October 1974 |
| Nov | 40.9 mm (1.6 in) | 30 November 1982 |
| Dec | 45.0 mm (1.8 in) | 17 December 1978 |
Period of Record Coverage
1948 to 1990| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1948 | 195 | 53% | No |
| 1949 | 360 | 99% | Yes |
| 1950 | 334 | 92% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 361 | 99% | Yes |
| 1954 | 340 | 93% | Yes |
| 1955 | 354 | 97% | Yes |
| 1956 | 355 | 97% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 360 | 99% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 362 | 99% | Yes |
| 1964 | 349 | 95% | Yes |
| 1965 | 353 | 97% | Yes |
| 1966 | 361 | 99% | Yes |
| 1967 | 362 | 99% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 360 | 99% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 351 | 96% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 364 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 138 | 38% | No |
| 1988 | 252 | 69% | No |
| 1989 | 365 | 100% | Yes |
| 1990 | 363 | 99% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 20 October 1990 | Ojos Negros, MX | daily high min (Tie) | 15.0 C (59.0 F) | tie | 35 years | 3 of 100 (Routine) |
| 19 October 1990 | Ojos Negros, MX | daily high min (Tie) | 12.8 C (55.0 F) | tie | 36 years | 3 of 100 (Routine) |
| 8 October 1990 | Ojos Negros, MX | daily high min | 15.6 C (60.1 F) | 1.7 C (3.1 F) | 27 years | 16 of 100 (Routine) |
| 4 September 1990 | Ojos Negros, MX | daily rain | 1.8 mm (0.07 in) | 1.5 mm (0.06 in) | 40 years | 17 of 100 (Routine) |
| 13 August 1990 | Ojos Negros, MX | daily high min (Tie) | 20.0 C (68.0 F) | tie | 16 years | 2 of 100 (Routine) |
| 12 August 1990 | Ojos Negros, MX | daily high min (Tie) | 20.0 C (68.0 F) | tie | 24 years | 2 of 100 (Routine) |
| 11 July 1990 | Ojos Negros, MX | daily high min | 20.0 C (68.0 F) | 2.2 C (4.0 F) | 33 years | 19 of 100 (Routine) |
| 10 July 1990 | Ojos Negros, MX | daily high min | 20.6 C (69.1 F) | 1.7 C (3.1 F) | 31 years | 17 of 100 (Routine) |
| 26 June 1990 | Ojos Negros, MX | daily high max | 43.9 C (111.0 F) | 1.7 C (3.1 F) | 36 years | 17 of 100 (Routine) |
| 10 June 1990 | Ojos Negros, MX | daily high min (Tie) | 15.6 C (60.1 F) | tie | 27 years | 3 of 100 (Routine) |
| 9 June 1990 | Ojos Negros, MX | daily high min | 15.0 C (59.0 F) | 2.2 C (4.0 F) | 17 years | 15 of 100 (Routine) |
| 8 June 1990 | Ojos Negros, MX | daily rain | 1.5 mm (0.06 in) | 1.5 mm (0.06 in) | 40 years | 17 of 100 (Routine) |
| 3 June 1990 | Ojos Negros, MX | daily high min (Tie) | 11.7 C (53.1 F) | tie | 29 years | 3 of 100 (Routine) |
| 28 May 1990 | Ojos Negros, MX | daily rain | 2.8 mm (0.11 in) | 2.8 mm (0.11 in) | 40 years | 20 of 100 (Routine) |
| 27 May 1990 | Ojos Negros, MX | daily rain | 0.3 mm (0.01 in) | 0.3 mm (0.01 in) | 40 years | 17 of 100 (Routine) |
| 23 April 1990 | Ojos Negros, MX | daily rain | 2.3 mm (0.09 in) | 1.5 mm (0.06 in) | 9 years | 8 of 100 (Routine) |
| 20 April 1990 | Ojos Negros, MX | daily high min (Tie) | 8.9 C (48.0 F) | tie | 39 years | 3 of 100 (Routine) |
| 7 April 1990 | Ojos Negros, MX | daily high min (Tie) | 10.0 C (50.0 F) | tie | 31 years | 3 of 100 (Routine) |
| 5 April 1990 | Ojos Negros, MX | daily high min (Tie) | 8.9 C (48.0 F) | tie | 16 years | 2 of 100 (Routine) |
| 4 April 1990 | Ojos Negros, MX | daily high min | 7.8 C (46.0 F) | 1.1 C (2.0 F) | 28 years | 15 of 100 (Routine) |
Climate Trend
37 complete years, 1949 to 1990| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1949 | 16.6 C | +0.67 C |
| 1951 | 18.4 C | +2.45 C |
| 1952 | 17.7 C | +1.72 C |
| 1953 | 18.9 C | +3.00 C |
| 1954 | 19.9 C | +3.99 C |
| 1955 | 19.4 C | +3.44 C |
| 1956 | 21.8 C | +5.82 C |
| 1957 | 17.6 C | +1.65 C |
| 1958 | 15.6 C | -0.38 C |
| 1959 | 19.2 C | +3.27 C |
| 1960 | 15.6 C | -0.30 C |
| 1961 | 15.1 C | -0.81 C |
| 1962 | 15.1 C | -0.89 C |
| 1963 | 18.4 C | +2.47 C |
| 1965 | 13.0 C | -2.92 C |
| 1966 | 14.1 C | -1.87 C |
| 1967 | 15.0 C | -0.90 C |
| 1968 | 16.5 C | +0.58 C |
| 1969 | 15.7 C | -0.27 C |
| 1970 | 16.3 C | +0.39 C |
| 1972 | 15.3 C | -0.64 C |
| 1973 | 14.2 C | -1.77 C |
| 1974 | 14.0 C | -1.91 C |
| 1975 | 12.8 C | -3.13 C |
| 1976 | 14.8 C | -1.13 C |
| 1977 | 15.2 C | -0.78 C |
| 1978 | 14.2 C | -1.76 C |
| 1979 | 13.6 C | -2.39 C |
| 1980 | 13.9 C | -2.03 C |
| 1981 | 14.7 C | -1.20 C |
| 1982 | 14.0 C | -1.96 C |
| 1983 | 14.2 C | -1.71 C |
| 1984 | 16.0 C | +0.06 C |
| 1985 | 14.5 C | -1.40 C |
| 1986 | 15.0 C | -0.99 C |
| 1989 | 17.0 C | +1.06 C |
| 1990 | 16.6 C | +0.66 C |
The annual mean temperature here has fallen by 1.0 C (0.5 to 1.5) per decade over 1949 to 1990. In Fahrenheit: 1.9 F (1.0 to 2.7) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -1.0 C (-1.5 to -0.5) per decade | -1.9 F (-2.7 to -1.0) per decade | 1949 to 1990 | 37 | Fall |
| Mean daily maximum | -2.1 C (-2.9 to -1.2) per decade | -3.7 F (-5.2 to -2.2) per decade | 1949 to 1990 | 37 | Fall |
| Mean daily minimum | 0.00 C (-0.32 to 0.32) per decade | 0.00 F (-0.58 to 0.58) per decade | 1949 to 1990 | 37 | 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 1990| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 52.8 C (127.0 F) | 1955 | 42.8 C (109.0 F) | 43 |
| Coldest night (TNn) | -17.2 C (1.0 F) | 1967 | -8.3 C (17.1 F) | 43 |
| Wettest day (Rx1day) | 84.8 mm (3.3 in) | 1977 | 30.0 mm (1.2 in) | 43 |
| Wettest five days (Rx5day) | 138.5 mm (5.5 in) | 1980 | 47.0 mm (1.9 in) | 43 |
| Longest dry spell (CDD) | 228 days | 1966 | 101 days | 43 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1948 | 40.6 C (105.1 F) |
| 1949 | 47.2 C (117.0 F) |
| 1950 | 50.0 C (122.0 F) |
| 1951 | 48.9 C (120.0 F) |
| 1952 | 48.9 C (120.0 F) |
| 1953 | 51.1 C (124.0 F) |
| 1954 | 50.0 C (122.0 F) |
| 1955 | 52.8 C (127.0 F) |
| 1956 | 50.6 C (123.1 F) |
| 1957 | 43.9 C (111.0 F) |
| 1958 | 40.6 C (105.1 F) |
| 1959 | 50.6 C (123.1 F) |
| 1960 | 41.7 C (107.1 F) |
| 1961 | 40.6 C (105.1 F) |
| 1962 | 42.8 C (109.0 F) |
| 1963 | 48.9 C (120.0 F) |
| 1964 | 42.8 C (109.0 F) |
| 1965 | 37.8 C (100.0 F) |
| 1966 | 47.8 C (118.0 F) |
| 1967 | 50.0 C (122.0 F) |
| 1968 | 45.0 C (113.0 F) |
| 1969 | 50.6 C (123.1 F) |
| 1970 | 45.0 C (113.0 F) |
| 1971 | 47.8 C (118.0 F) |
| 1972 | 42.8 C (109.0 F) |
| 1973 | 42.8 C (109.0 F) |
| 1974 | 40.6 C (105.1 F) |
| 1975 | 38.9 C (102.0 F) |
| 1976 | 43.9 C (111.0 F) |
| 1977 | 45.0 C (113.0 F) |
| 1978 | 42.8 C (109.0 F) |
| 1979 | 40.6 C (105.1 F) |
| 1980 | 36.7 C (98.1 F) |
| 1981 | 37.8 C (100.0 F) |
| 1982 | 40.0 C (104.0 F) |
| 1983 | 38.9 C (102.0 F) |
| 1984 | 40.6 C (105.1 F) |
| 1985 | 40.6 C (105.1 F) |
| 1986 | 40.0 C (104.0 F) |
| 1987 | 30.6 C (87.1 F) |
| 1988 | 40.6 C (105.1 F) |
| 1989 | 45.0 C (113.0 F) |
| 1990 | 43.9 C (111.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1948 | -6.1 C (21.0 F) |
| 1949 | -9.4 C (15.1 F) |
| 1950 | -6.1 C (21.0 F) |
| 1951 | -7.2 C (19.0 F) |
| 1952 | -6.7 C (19.9 F) |
| 1953 | -9.4 C (15.1 F) |
| 1954 | -10.0 C (14.0 F) |
| 1955 | -8.3 C (17.1 F) |
| 1956 | -1.1 C (30.0 F) |
| 1957 | -9.4 C (15.1 F) |
| 1958 | -9.4 C (15.1 F) |
| 1959 | -6.1 C (21.0 F) |
| 1960 | -5.0 C (23.0 F) |
| 1961 | -2.2 C (28.0 F) |
| 1962 | -6.1 C (21.0 F) |
| 1963 | -6.1 C (21.0 F) |
| 1964 | -5.0 C (23.0 F) |
| 1965 | -9.4 C (15.1 F) |
| 1966 | -14.4 C (6.1 F) |
| 1967 | -17.2 C (1.0 F) |
| 1968 | -12.2 C (10.0 F) |
| 1969 | -9.4 C (15.1 F) |
| 1970 | -13.3 C (8.1 F) |
| 1971 | -10.0 C (14.0 F) |
| 1972 | -12.2 C (10.0 F) |
| 1973 | -10.0 C (14.0 F) |
| 1974 | -12.2 C (10.0 F) |
| 1975 | -12.2 C (10.0 F) |
| 1976 | -13.3 C (8.1 F) |
| 1977 | -10.0 C (14.0 F) |
| 1978 | -9.4 C (15.1 F) |
| 1979 | -8.3 C (17.1 F) |
| 1980 | -7.2 C (19.0 F) |
| 1981 | -10.0 C (14.0 F) |
| 1982 | -8.3 C (17.1 F) |
| 1983 | -5.0 C (23.0 F) |
| 1984 | -5.0 C (23.0 F) |
| 1985 | -4.4 C (24.1 F) |
| 1986 | -4.4 C (24.1 F) |
| 1987 | -4.4 C (24.1 F) |
| 1988 | -6.1 C (21.0 F) |
| 1989 | -6.1 C (21.0 F) |
| 1990 | -7.2 C (19.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 9.9 mm (0.39 in) |
| 1949 | 36.8 mm (1.4 in) |
| 1950 | 13.0 mm (0.5 in) |
| 1951 | 29.0 mm (1.1 in) |
| 1952 | 33.8 mm (1.3 in) |
| 1953 | 29.5 mm (1.2 in) |
| 1954 | 49.3 mm (1.9 in) |
| 1955 | 15.7 mm (0.6 in) |
| 1956 | 15.7 mm (0.6 in) |
| 1957 | 32.8 mm (1.3 in) |
| 1958 | 33.8 mm (1.3 in) |
| 1959 | 19.1 mm (0.8 in) |
| 1960 | 27.9 mm (1.1 in) |
| 1961 | 16.8 mm (0.7 in) |
| 1962 | 26.9 mm (1.1 in) |
| 1963 | 22.9 mm (0.9 in) |
| 1964 | 20.3 mm (0.8 in) |
| 1965 | 33.3 mm (1.3 in) |
| 1966 | 26.4 mm (1.0 in) |
| 1967 | 33.8 mm (1.3 in) |
| 1968 | 25.9 mm (1.0 in) |
| 1969 | 45.0 mm (1.8 in) |
| 1970 | 36.8 mm (1.4 in) |
| 1971 | 14.0 mm (0.6 in) |
| 1972 | 17.3 mm (0.7 in) |
| 1973 | 21.8 mm (0.9 in) |
| 1974 | 31.8 mm (1.3 in) |
| 1975 | 30.0 mm (1.2 in) |
| 1976 | 27.9 mm (1.1 in) |
| 1977 | 84.8 mm (3.3 in) |
| 1978 | 45.0 mm (1.8 in) |
| 1979 | 31.8 mm (1.3 in) |
| 1980 | 66.8 mm (2.6 in) |
| 1981 | 34.8 mm (1.4 in) |
| 1982 | 40.9 mm (1.6 in) |
| 1983 | 42.9 mm (1.7 in) |
| 1984 | 33.3 mm (1.3 in) |
| 1985 | 25.1 mm (1.0 in) |
| 1986 | 42.9 mm (1.7 in) |
| 1987 | 30.2 mm (1.2 in) |
| 1988 | 47.0 mm (1.9 in) |
| 1989 | 13.0 mm (0.5 in) |
| 1990 | 15.0 mm (0.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 17.8 mm (0.7 in) |
| 1949 | 90.4 mm (3.6 in) |
| 1950 | 25.7 mm (1.0 in) |
| 1951 | 43.8 mm (1.7 in) |
| 1952 | 48.6 mm (1.9 in) |
| 1953 | 29.5 mm (1.2 in) |
| 1954 | 73.1 mm (2.9 in) |
| 1955 | 29.7 mm (1.2 in) |
| 1956 | 15.7 mm (0.6 in) |
| 1957 | 93.6 mm (3.7 in) |
| 1958 | 54.9 mm (2.2 in) |
| 1959 | 33.3 mm (1.3 in) |
| 1960 | 27.9 mm (1.1 in) |
| 1961 | 32.6 mm (1.3 in) |
| 1962 | 41.1 mm (1.6 in) |
| 1963 | 22.9 mm (0.9 in) |
| 1964 | 29.0 mm (1.1 in) |
| 1965 | 54.6 mm (2.1 in) |
| 1966 | 58.7 mm (2.3 in) |
| 1967 | 76.2 mm (3.0 in) |
| 1968 | 27.2 mm (1.1 in) |
| 1969 | 58.5 mm (2.3 in) |
| 1970 | 59.4 mm (2.3 in) |
| 1971 | 24.2 mm (1.0 in) |
| 1972 | 35.9 mm (1.4 in) |
| 1973 | 36.4 mm (1.4 in) |
| 1974 | 66.4 mm (2.6 in) |
| 1975 | 44.7 mm (1.8 in) |
| 1976 | 54.1 mm (2.1 in) |
| 1977 | 99.8 mm (3.9 in) |
| 1978 | 75.2 mm (3.0 in) |
| 1979 | 54.9 mm (2.2 in) |
| 1980 | 138.5 mm (5.5 in) |
| 1981 | 69.3 mm (2.7 in) |
| 1982 | 49.8 mm (2.0 in) |
| 1983 | 91.0 mm (3.6 in) |
| 1984 | 48.5 mm (1.9 in) |
| 1985 | 35.6 mm (1.4 in) |
| 1986 | 49.5 mm (1.9 in) |
| 1987 | 38.9 mm (1.5 in) |
| 1988 | 47.0 mm (1.9 in) |
| 1989 | 18.8 mm (0.7 in) |
| 1990 | 29.0 mm (1.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 124 days |
| 1949 | 189 days |
| 1950 | 71 days |
| 1951 | 62 days |
| 1952 | 100 days |
| 1953 | 191 days |
| 1954 | 103 days |
| 1955 | 92 days |
| 1956 | 163 days |
| 1957 | 68 days |
| 1958 | 100 days |
| 1959 | 92 days |
| 1960 | 77 days |
| 1961 | 111 days |
| 1962 | 85 days |
| 1963 | 143 days |
| 1964 | 160 days |
| 1965 | 119 days |
| 1966 | 228 days |
| 1967 | 80 days |
| 1968 | 142 days |
| 1969 | 187 days |
| 1970 | 62 days |
| 1971 | 85 days |
| 1972 | 139 days |
| 1973 | 139 days |
| 1974 | 143 days |
| 1975 | 99 days |
| 1976 | 101 days |
| 1977 | 94 days |
| 1978 | 87 days |
| 1979 | 116 days |
| 1980 | 207 days |
| 1981 | 73 days |
| 1982 | 144 days |
| 1983 | 96 days |
| 1984 | 75 days |
| 1985 | 84 days |
| 1986 | 105 days |
| 1987 | 36 days |
| 1988 | 92 days |
| 1989 | 129 days |
| 1990 | 101 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
36 years with a frostAcross 36 years with a frost, the median last spring frost at Ojos Negros falls on 3 May and the median first autumn frost on 2 November, which leaves a median of 183 days between them.
Fitted over all years, the growing season changes by -14.3 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1957 to 1990) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 3 May | n/a | 8 May | n/a | +7.7 days per decade |
| First autumn frost | 2 November | n/a | 30 October | n/a | -6.6 days per decade |
| Growing days | 183 days | n/a | 171 days | n/a | -14.3 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, 1949 to 1990A day with at least 28.5 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 76.9 mm (3.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 28.5 mm (1.1 in) | |
| 5 years | 40.7 mm (1.6 in) | |
| 10 years | 49.1 mm (1.9 in) | |
| 25 years | 60.0 mm (2.4 in) | |
| 50 years | 68.4 mm (2.7 in) | Longer than the 40 years of record |
| 100 years | 76.9 mm (3.0 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 1949 to 1990.
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 1977; 66.8 mm (2.6 in) in 1980; 49.3 mm (1.9 in) in 1954.
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).