Zacatecas (Smn) Weather Records (MXN00032063)
Record envelope, standing records and threshold days for Zacatecas (Smn) (MXN00032063), Mexico, with 57 years of record.
Key Facts for Zacatecas (Smn)
- Zacatecas (Smn) (MXN00032063) is a weather station in Mexico at 22.78 latitude and -102.58 longitude, 2,496 m (8,188 ft) above sea level.
- The station reports from 1929 to 1985, 57 years of record.
- 1,464 records set at Zacatecas (Smn) still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Zacatecas (Smn) set a daily record precipitation of 22.4 mm (0.9 in) on 19 December 1985.
About the Station
- Location: Mexico, 22.78 latitude, -102.58 longitude.
- Elevation: 2,496 m (8,188 ft).
- Period of record: 1929 to 1985, 57 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 | 30.6 C (87.1 F) | -7.2 C (19.0 F) | n/a | n/a |
| Feb | 29.4 C (84.9 F) | -8.3 C (17.1 F) | n/a | n/a |
| Mar | 31.7 C (89.1 F) | -2.8 C (27.0 F) | n/a | n/a |
| Apr | 31.1 C (88.0 F) | -1.1 C (30.0 F) | n/a | n/a |
| May | 35.6 C (96.1 F) | 3.3 C (37.9 F) | n/a | n/a |
| Jun | 33.3 C (91.9 F) | 3.9 C (39.0 F) | n/a | n/a |
| Jul | 29.4 C (84.9 F) | 5.6 C (42.1 F) | n/a | n/a |
| Aug | 29.4 C (84.9 F) | 5.6 C (42.1 F) | n/a | n/a |
| Sep | 30.0 C (86.0 F) | 3.3 C (37.9 F) | n/a | n/a |
| Oct | 30.0 C (86.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Nov | 28.9 C (84.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Dec | 27.8 C (82.0 F) | -4.4 C (24.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1929 | 23 |
| 1930 | 50 |
| 1931 | 49 |
| 1932 | 57 |
| 1933 | 34 |
| 1934 | 15 |
| 1935 | 26 |
| 1936 | 17 |
| 1938 | 37 |
| 1939 | 21 |
| 1940 | 25 |
| 1941 | 22 |
| 1942 | 15 |
| 1943 | 22 |
| 1944 | 30 |
| 1945 | 30 |
| 1946 | 27 |
| 1947 | 26 |
| 1948 | 29 |
| 1949 | 27 |
| 1950 | 19 |
| 1951 | 36 |
| 1952 | 27 |
| 1953 | 25 |
| 1954 | 20 |
| 1955 | 32 |
| 1956 | 25 |
| 1957 | 54 |
| 1958 | 41 |
| 1959 | 52 |
| 1960 | 117 |
| 1971 | 27 |
| 1972 | 45 |
| 1973 | 36 |
| 1974 | 22 |
| 1975 | 29 |
| 1976 | 31 |
| 1977 | 27 |
| 1978 | 23 |
| 1979 | 24 |
| 1980 | 38 |
| 1981 | 11 |
| 1982 | 27 |
| 1983 | 35 |
| 1984 | 21 |
| 1985 | 38 |
Wettest Day of Each Month
Jul: 82.3 mm (3.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 48.0 mm (1.9 in) | 5 January 1948 |
| Feb | 17.3 mm (0.7 in) | 12 February 1935 |
| Mar | 32.8 mm (1.3 in) | 6 March 1958 |
| Apr | 52.1 mm (2.1 in) | 14 April 1959 |
| May | 43.4 mm (1.7 in) | 27 May 1983 |
| Jun | 60.2 mm (2.4 in) | 12 June 1985 |
| Jul | 82.3 mm (3.2 in) | 10 July 1955 |
| Aug | 46.5 mm (1.8 in) | 28 August 1932 |
| Sep | 74.9 mm (2.9 in) | 28 September 1973 |
| Oct | 34.8 mm (1.4 in) | 16 October 1973 |
| Nov | 45.0 mm (1.8 in) | 8 November 1930 |
| Dec | 64.8 mm (2.6 in) | 26 December 1978 |
Period of Record Coverage
1929 to 1985| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1929 | 162 | 44% | No |
| 1930 | 362 | 99% | Yes |
| 1931 | 364 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 334 | 92% | Yes |
| 1934 | 334 | 92% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 335 | 92% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 363 | 99% | Yes |
| 1949 | 362 | 99% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 359 | 98% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 333 | 91% | Yes |
| 1956 | 273 | 75% | No |
| 1957 | 362 | 99% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 360 | 99% | Yes |
| 1960 | 243 | 66% | No |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 303 | 83% | No |
| 1979 | 358 | 98% | Yes |
| 1980 | 245 | 67% | No |
| 1981 | 247 | 68% | No |
| 1982 | 303 | 83% | No |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 19 December 1985 | Zacatecas (Smn), MX | daily rain | 22.4 mm (0.9 in) | 20.6 mm (0.8 in) | 10 years | 20 of 100 (Routine) |
| 14 December 1985 | Zacatecas (Smn), MX | daily low min (Tie) | -1.1 C (30.0 F) | tie | 32 years | 3 of 100 (Routine) |
| 5 November 1985 | Zacatecas (Smn), MX | daily low max (Tie) | 13.9 C (57.0 F) | tie | 8 years | 1 of 100 (Routine) |
| 1 November 1985 | Zacatecas (Smn), MX | daily low max | 13.9 C (57.0 F) | 3.3 C (5.9 F) | 8 years | 15 of 100 (Routine) |
| 13 September 1985 | Zacatecas (Smn), MX | daily low min (Tie) | 7.8 C (46.0 F) | tie | 26 years | 3 of 100 (Routine) |
| 12 September 1985 | Zacatecas (Smn), MX | daily low min (Tie) | 7.8 C (46.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 6 September 1985 | Zacatecas (Smn), MX | daily low min (Tie) | 8.3 C (46.9 F) | tie | 51 years | 5 of 100 (Routine) |
| 5 September 1985 | Zacatecas (Smn), MX | daily low min (Tie) | 8.3 C (46.9 F) | tie | 40 years | 4 of 100 (Routine) |
| 1 September 1985 | Zacatecas (Smn), MX | daily low min | 8.9 C (48.0 F) | 0.5 C (0.9 F) | 40 years | 20 of 100 (Routine) |
| 29 August 1985 | Zacatecas (Smn), MX | daily low min (Tie) | 8.9 C (48.0 F) | tie | 56 years | 5 of 100 (Routine) |
| 28 August 1985 | Zacatecas (Smn), MX | monthly low min | 5.6 C (42.1 F) | 2.2 C (4.0 F) | 52 years | 49 of 100 (Notable) |
| 27 August 1985 | Zacatecas (Smn), MX | daily low min (Tie) | 8.9 C (48.0 F) | tie | 2 years | 1 of 100 (Routine) |
| 26 August 1985 | Zacatecas (Smn), MX | daily low min | 8.9 C (48.0 F) | 0.5 C (0.9 F) | 34 years | 19 of 100 (Routine) |
| 24 August 1985 | Zacatecas (Smn), MX | daily low min (Tie) | 8.9 C (48.0 F) | tie | 55 years | 5 of 100 (Routine) |
| 23 August 1985 | Zacatecas (Smn), MX | daily low min (Tie) | 8.9 C (48.0 F) | tie | 48 years | 4 of 100 (Routine) |
| 22 August 1985 | Zacatecas (Smn), MX | monthly low min (Tie) | 7.8 C (46.0 F) | tie | 52 years | 7 of 100 (Routine) |
| 21 August 1985 | Zacatecas (Smn), MX | monthly low min (Tie) | 7.8 C (46.0 F) | tie | 52 years | 7 of 100 (Routine) |
| 20 August 1985 | Zacatecas (Smn), MX | daily low min | 8.3 C (46.9 F) | 0.6 C (1.1 F) | 8 years | 12 of 100 (Routine) |
| 18 August 1985 | Zacatecas (Smn), MX | daily low min | 8.3 C (46.9 F) | 0.6 C (1.1 F) | 54 years | 26 of 100 (Routine) |
| 15 August 1985 | Zacatecas (Smn), MX | daily low max (Tie) | 17.8 C (64.0 F) | tie | 12 years | 2 of 100 (Routine) |
Climate Trend
35 complete years, 1930 to 1985| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1930 | 15.0 C | -0.49 C |
| 1931 | 14.8 C | -0.67 C |
| 1932 | 15.7 C | +0.19 C |
| 1935 | 15.1 C | -0.43 C |
| 1936 | 15.7 C | +0.26 C |
| 1938 | 15.8 C | +0.32 C |
| 1939 | 15.5 C | -0.01 C |
| 1941 | 15.6 C | +0.13 C |
| 1942 | 15.5 C | +0.02 C |
| 1943 | 15.5 C | -0.02 C |
| 1944 | 15.2 C | -0.29 C |
| 1945 | 16.5 C | +1.04 C |
| 1946 | 16.1 C | +0.64 C |
| 1947 | 15.9 C | +0.39 C |
| 1948 | 16.4 C | +0.87 C |
| 1949 | 16.1 C | +0.64 C |
| 1950 | 16.4 C | +0.88 C |
| 1951 | 16.1 C | +0.57 C |
| 1952 | 15.7 C | +0.20 C |
| 1953 | 15.4 C | -0.10 C |
| 1954 | 16.0 C | +0.54 C |
| 1957 | 16.4 C | +0.94 C |
| 1958 | 15.5 C | +0.01 C |
| 1959 | 15.3 C | -0.22 C |
| 1971 | 15.3 C | -0.16 C |
| 1972 | 15.7 C | +0.22 C |
| 1973 | 15.1 C | -0.38 C |
| 1974 | 15.4 C | -0.10 C |
| 1975 | 15.2 C | -0.24 C |
| 1976 | 14.5 C | -0.99 C |
| 1977 | 15.1 C | -0.42 C |
| 1979 | 15.3 C | -0.16 C |
| 1983 | 14.6 C | -0.86 C |
| 1984 | 14.6 C | -0.85 C |
| 1985 | 13.9 C | -1.56 C |
The annual mean temperature here has fallen by 0.16 C (0.05 to 0.27) per decade over 1930 to 1985. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.16 C (-0.27 to -0.05) per decade | -0.3 F (-0.5 to -0.1) per decade | 1930 to 1985 | 35 | Fall |
| Mean daily maximum | -0.4 C (-0.6 to -0.2) per decade | -0.8 F (-1.2 to -0.4) per decade | 1930 to 1985 | 35 | Fall |
| Mean daily minimum | 0.12 C (0.02 to 0.22) per decade | 0.21 F (0.04 to 0.39) per decade | 1930 to 1985 | 35 | 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
1929 to 1985| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 35.6 C (96.1 F) | 1949 | 30.0 C (86.0 F) | 46 |
| Coldest night (TNn) | -8.3 C (17.1 F) | 1960 | -2.2 C (28.0 F) | 46 |
| Wettest day (Rx1day) | 82.3 mm (3.2 in) | 1955 | 41.9 mm (1.6 in) | 46 |
| Wettest five days (Rx5day) | 122.9 mm (4.8 in) | 1930 | 74.9 mm (2.9 in) | 46 |
| Longest dry spell (CDD) | 139 days | 1960 | 78 days | 46 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1929 | 28.9 C (84.0 F) |
| 1930 | 31.1 C (88.0 F) |
| 1931 | 30.0 C (86.0 F) |
| 1932 | 32.2 C (90.0 F) |
| 1933 | 31.7 C (89.1 F) |
| 1934 | 29.4 C (84.9 F) |
| 1935 | 28.9 C (84.0 F) |
| 1936 | 30.0 C (86.0 F) |
| 1938 | 31.7 C (89.1 F) |
| 1939 | 29.4 C (84.9 F) |
| 1940 | 28.9 C (84.0 F) |
| 1941 | 28.3 C (82.9 F) |
| 1942 | 28.9 C (84.0 F) |
| 1943 | 29.4 C (84.9 F) |
| 1944 | 28.9 C (84.0 F) |
| 1945 | 29.4 C (84.9 F) |
| 1946 | 29.4 C (84.9 F) |
| 1947 | 29.4 C (84.9 F) |
| 1948 | 29.4 C (84.9 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 28.3 C (82.9 F) |
| 1951 | 28.3 C (82.9 F) |
| 1952 | 27.8 C (82.0 F) |
| 1953 | 31.7 C (89.1 F) |
| 1954 | 31.1 C (88.0 F) |
| 1955 | 30.6 C (87.1 F) |
| 1956 | 31.1 C (88.0 F) |
| 1957 | 32.2 C (90.0 F) |
| 1958 | 29.4 C (84.9 F) |
| 1959 | 29.4 C (84.9 F) |
| 1960 | 30.0 C (86.0 F) |
| 1971 | 30.6 C (87.1 F) |
| 1972 | 30.6 C (87.1 F) |
| 1973 | 31.1 C (88.0 F) |
| 1974 | 30.0 C (86.0 F) |
| 1975 | 30.0 C (86.0 F) |
| 1976 | 30.6 C (87.1 F) |
| 1977 | 29.4 C (84.9 F) |
| 1978 | 30.6 C (87.1 F) |
| 1979 | 29.4 C (84.9 F) |
| 1980 | 30.6 C (87.1 F) |
| 1981 | 29.4 C (84.9 F) |
| 1982 | 33.3 C (91.9 F) |
| 1983 | 31.7 C (89.1 F) |
| 1984 | 31.1 C (88.0 F) |
| 1985 | 30.6 C (87.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1929 | -6.1 C (21.0 F) |
| 1930 | -2.8 C (27.0 F) |
| 1931 | -1.7 C (28.9 F) |
| 1932 | -2.2 C (28.0 F) |
| 1933 | 0.6 C (33.1 F) |
| 1934 | -0.6 C (30.9 F) |
| 1935 | -4.4 C (24.1 F) |
| 1936 | 0.0 C (32.0 F) |
| 1938 | -2.8 C (27.0 F) |
| 1939 | -0.6 C (30.9 F) |
| 1940 | -3.3 C (26.1 F) |
| 1941 | -3.3 C (26.1 F) |
| 1942 | -3.9 C (25.0 F) |
| 1943 | -0.6 C (30.9 F) |
| 1944 | -6.7 C (19.9 F) |
| 1945 | -2.8 C (27.0 F) |
| 1946 | -2.8 C (27.0 F) |
| 1947 | -3.3 C (26.1 F) |
| 1948 | -1.1 C (30.0 F) |
| 1949 | -0.6 C (30.9 F) |
| 1950 | -0.6 C (30.9 F) |
| 1951 | -3.3 C (26.1 F) |
| 1952 | -3.9 C (25.0 F) |
| 1953 | -3.9 C (25.0 F) |
| 1954 | -0.6 C (30.9 F) |
| 1955 | -2.2 C (28.0 F) |
| 1956 | -2.8 C (27.0 F) |
| 1957 | -2.2 C (28.0 F) |
| 1958 | -4.4 C (24.1 F) |
| 1959 | -1.7 C (28.9 F) |
| 1960 | -8.3 C (17.1 F) |
| 1971 | -1.7 C (28.9 F) |
| 1972 | -2.2 C (28.0 F) |
| 1973 | -3.3 C (26.1 F) |
| 1974 | -2.2 C (28.0 F) |
| 1975 | -4.4 C (24.1 F) |
| 1976 | -2.2 C (28.0 F) |
| 1977 | 0.0 C (32.0 F) |
| 1978 | -2.2 C (28.0 F) |
| 1979 | 0.6 C (33.1 F) |
| 1980 | 0.0 C (32.0 F) |
| 1981 | -2.2 C (28.0 F) |
| 1982 | 0.0 C (32.0 F) |
| 1983 | -2.2 C (28.0 F) |
| 1984 | -2.2 C (28.0 F) |
| 1985 | -7.2 C (19.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1929 | 32.8 mm (1.3 in) |
| 1930 | 45.0 mm (1.8 in) |
| 1931 | 33.3 mm (1.3 in) |
| 1932 | 46.5 mm (1.8 in) |
| 1933 | 60.5 mm (2.4 in) |
| 1934 | 41.9 mm (1.6 in) |
| 1935 | 62.5 mm (2.5 in) |
| 1936 | 25.4 mm (1.0 in) |
| 1938 | 31.8 mm (1.3 in) |
| 1939 | 71.9 mm (2.8 in) |
| 1940 | 39.1 mm (1.5 in) |
| 1941 | 41.9 mm (1.6 in) |
| 1942 | 34.8 mm (1.4 in) |
| 1943 | 31.0 mm (1.2 in) |
| 1944 | 39.4 mm (1.6 in) |
| 1945 | 39.4 mm (1.6 in) |
| 1946 | 30.5 mm (1.2 in) |
| 1947 | 59.9 mm (2.4 in) |
| 1948 | 48.0 mm (1.9 in) |
| 1949 | 36.8 mm (1.4 in) |
| 1950 | 45.0 mm (1.8 in) |
| 1951 | 55.4 mm (2.2 in) |
| 1952 | 42.4 mm (1.7 in) |
| 1953 | 35.1 mm (1.4 in) |
| 1954 | 22.9 mm (0.9 in) |
| 1955 | 82.3 mm (3.2 in) |
| 1956 | 41.9 mm (1.6 in) |
| 1957 | 36.8 mm (1.4 in) |
| 1958 | 43.4 mm (1.7 in) |
| 1959 | 52.1 mm (2.1 in) |
| 1960 | 38.1 mm (1.5 in) |
| 1971 | 45.2 mm (1.8 in) |
| 1972 | 43.9 mm (1.7 in) |
| 1973 | 74.9 mm (2.9 in) |
| 1974 | 29.0 mm (1.1 in) |
| 1975 | 56.9 mm (2.2 in) |
| 1976 | 35.8 mm (1.4 in) |
| 1977 | 49.8 mm (2.0 in) |
| 1978 | 64.8 mm (2.6 in) |
| 1979 | 39.9 mm (1.6 in) |
| 1980 | 20.8 mm (0.8 in) |
| 1981 | 23.6 mm (0.9 in) |
| 1982 | 29.0 mm (1.1 in) |
| 1983 | 43.4 mm (1.7 in) |
| 1984 | 50.3 mm (2.0 in) |
| 1985 | 60.2 mm (2.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1929 | 54.3 mm (2.1 in) |
| 1930 | 122.9 mm (4.8 in) |
| 1931 | 44.7 mm (1.8 in) |
| 1932 | 65.8 mm (2.6 in) |
| 1933 | 74.3 mm (2.9 in) |
| 1934 | 92.0 mm (3.6 in) |
| 1935 | 114.0 mm (4.5 in) |
| 1936 | 52.9 mm (2.1 in) |
| 1938 | 87.9 mm (3.5 in) |
| 1939 | 81.0 mm (3.2 in) |
| 1940 | 58.2 mm (2.3 in) |
| 1941 | 96.1 mm (3.8 in) |
| 1942 | 63.6 mm (2.5 in) |
| 1943 | 62.0 mm (2.4 in) |
| 1944 | 72.7 mm (2.9 in) |
| 1945 | 80.6 mm (3.2 in) |
| 1946 | 39.4 mm (1.6 in) |
| 1947 | 87.1 mm (3.4 in) |
| 1948 | 68.3 mm (2.7 in) |
| 1949 | 67.4 mm (2.7 in) |
| 1950 | 103.6 mm (4.1 in) |
| 1951 | 105.0 mm (4.1 in) |
| 1952 | 56.4 mm (2.2 in) |
| 1953 | 57.9 mm (2.3 in) |
| 1954 | 53.1 mm (2.1 in) |
| 1955 | 100.0 mm (3.9 in) |
| 1956 | 101.1 mm (4.0 in) |
| 1957 | 60.7 mm (2.4 in) |
| 1958 | 80.8 mm (3.2 in) |
| 1959 | 99.1 mm (3.9 in) |
| 1960 | 81.6 mm (3.2 in) |
| 1971 | 108.2 mm (4.3 in) |
| 1972 | 69.7 mm (2.7 in) |
| 1973 | 84.6 mm (3.3 in) |
| 1974 | 110.5 mm (4.4 in) |
| 1975 | 102.1 mm (4.0 in) |
| 1976 | 109.8 mm (4.3 in) |
| 1977 | 121.4 mm (4.8 in) |
| 1978 | 73.4 mm (2.9 in) |
| 1979 | 56.7 mm (2.2 in) |
| 1980 | 25.7 mm (1.0 in) |
| 1981 | 56.9 mm (2.2 in) |
| 1982 | 62.0 mm (2.4 in) |
| 1983 | 75.5 mm (3.0 in) |
| 1984 | 82.4 mm (3.2 in) |
| 1985 | 73.2 mm (2.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1929 | 35 days |
| 1930 | 65 days |
| 1931 | 68 days |
| 1932 | 79 days |
| 1933 | 111 days |
| 1934 | 93 days |
| 1935 | 68 days |
| 1936 | 102 days |
| 1938 | 73 days |
| 1939 | 53 days |
| 1940 | 46 days |
| 1941 | 78 days |
| 1942 | 78 days |
| 1943 | 122 days |
| 1944 | 52 days |
| 1945 | 46 days |
| 1946 | 51 days |
| 1947 | 115 days |
| 1948 | 96 days |
| 1949 | 65 days |
| 1950 | 128 days |
| 1951 | 79 days |
| 1952 | 132 days |
| 1953 | 92 days |
| 1954 | 103 days |
| 1955 | 119 days |
| 1956 | 60 days |
| 1957 | 114 days |
| 1958 | 70 days |
| 1959 | 97 days |
| 1960 | 139 days |
| 1971 | 132 days |
| 1972 | 76 days |
| 1973 | 123 days |
| 1974 | 75 days |
| 1975 | 134 days |
| 1976 | 73 days |
| 1977 | 71 days |
| 1978 | 83 days |
| 1979 | 70 days |
| 1980 | 50 days |
| 1981 | 31 days |
| 1982 | 52 days |
| 1983 | 72 days |
| 1984 | 103 days |
| 1985 | 81 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
25 years with a frostAcross 25 years with a frost, the median last spring frost at Zacatecas (Smn) falls on 15 February and the median first autumn frost on 9 December, which leaves a median of 295 days between them.
Fitted over all years, the growing season changes by +5.2 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1930 to 1985) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 15 February | n/a | 15 February | n/a | -2.4 days per decade |
| First autumn frost | 9 December | n/a | 9 December | n/a | +2.7 days per decade |
| Growing days | 295 days | n/a | 295 days | n/a | +5.2 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
39 years, 1930 to 1985A day with at least 42.9 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 88.9 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 | 42.9 mm (1.7 in) | |
| 5 years | 55.0 mm (2.2 in) | |
| 10 years | 63.1 mm (2.5 in) | |
| 25 years | 73.4 mm (2.9 in) | |
| 50 years | 81.2 mm (3.2 in) | Longer than the 39 years of record |
| 100 years | 88.9 mm (3.5 in) | Longer than the 39 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, 39 years of values from 1930 to 1985.
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: 82.3 mm (3.2 in) in 1955; 74.9 mm (2.9 in) in 1973; 71.9 mm (2.8 in) in 1939.
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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).