Shamrock Weather Records (USC00418235)
Record envelope, standing records and threshold days for Shamrock (USC00418235), Texas, United States, with 59 years of record.
Key Facts for Shamrock
- Shamrock (USC00418235) is a weather station in Texas, United States at 35.20 latitude and -100.25 longitude, 708 m (2,323 ft) above sea level.
- The station reports from 1929 to 1987, 59 years of record.
- 0 records set at Shamrock still stand.
- Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Shamrock tied a monthly record snow depth of 17.8 cm (7.0 in) on 31 January 1987.
About the Station
- Location: Texas, United States, 35.20 latitude, -100.25 longitude.
- Elevation: 708 m (2,323 ft).
- Period of record: 1929 to 1987, 59 years.
- Eligible elements: prcp, snow, snwd.
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 | n/a | n/a | n/a | n/a |
| Feb | n/a | n/a | n/a | n/a |
| Mar | n/a | n/a | n/a | n/a |
| Apr | n/a | n/a | n/a | n/a |
| May | n/a | n/a | n/a | n/a |
| Jun | n/a | n/a | n/a | n/a |
| Jul | n/a | n/a | n/a | n/a |
| Aug | n/a | n/a | n/a | n/a |
| Sep | n/a | n/a | n/a | n/a |
| Oct | n/a | n/a | n/a | n/a |
| Nov | n/a | n/a | n/a | n/a |
| Dec | n/a | n/a | n/a | n/a |
Which Years Hold Standing Records
0 standing records| Year set | Standing records |
|---|
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1962-04-27 | Record daily precipitation | Record daily precipitation 153.7 mm (6.1 in) |
| 1964-02-05 | Record daily snowfall | Record daily snowfall 25.4 cm (10.0 in) |
| 1964-02-05 | Record snow depth | Record snow depth 25.4 cm (10.0 in) |
Wettest Day of Each Month
Apr: 153.7 mm (6.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 56.4 mm (2.2 in) | 8 January 1939 |
| Feb | 47.2 mm (1.9 in) | 4 February 1964 |
| Mar | 50.8 mm (2.0 in) | 10 March 1973 |
| Apr | 153.7 mm (6.1 in) | 27 April 1962 |
| May | 129.5 mm (5.1 in) | 1 May 1956 |
| Jun | 82.3 mm (3.2 in) | 21 June 1939 |
| Jul | 91.9 mm (3.6 in) | 12 July 1944 |
| Aug | 83.3 mm (3.3 in) | 31 August 1972 |
| Sep | 79.5 mm (3.1 in) | 3 September 1936 |
| Oct | 92.7 mm (3.6 in) | 18 October 1965 |
| Nov | 56.1 mm (2.2 in) | 4 November 1986 |
| Dec | 50.8 mm (2.0 in) | 15 December 1959 |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 31 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 30 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 29 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 28 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 27 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 26 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 25 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 24 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 23 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 22 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 21 January 1987 | Shamrock, US | monthly snow depth (Tie) | 17.8 cm (7.0 in) | tie | 41 years | 6 of 100 (Routine) |
| 19 January 1987 | Shamrock, US | daily snow depth (Tie) | 12.7 cm (5.0 in) | tie | 37 years | 4 of 100 (Routine) |
| 18 January 1987 | Shamrock, US | daily snow depth (Tie) | 10.2 cm (4.0 in) | tie | 3 years | 1 of 100 (Routine) |
| 17 January 1987 | Shamrock, US | daily snow depth | 5.1 cm (2.0 in) | 5.1 cm (2.0 in) | 56 years | 20 of 100 (Routine) |
| 16 January 1987 | Shamrock, US | daily snowfall | 2.5 cm (1.0 in) | 2.5 cm (1.0 in) | 56 years | 20 of 100 (Routine) |
| 9 January 1987 | Shamrock, US | daily rain | 9.4 mm (0.37 in) | 3.8 mm (0.15 in) | 21 years | 16 of 100 (Routine) |
| 7 December 1986 | Shamrock, US | daily rain | 5.6 mm (0.22 in) | 2.0 mm (0.08 in) | 55 years | 20 of 100 (Routine) |
| 4 November 1986 | Shamrock, US | monthly rain | 56.1 mm (2.2 in) | 5.3 mm (0.21 in) | 54 years | 36 of 100 (Notable) |
| 11 October 1986 | Shamrock, US | daily rain | 39.4 mm (1.6 in) | 21.9 mm (0.9 in) | 12 years | 22 of 100 (Routine) |
| 3 October 1986 | Shamrock, US | daily rain | 55.1 mm (2.2 in) | 18.5 mm (0.7 in) | 31 years | 26 of 100 (Routine) |
Extremes by Year
1929 to 1987| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Wettest day (Rx1day) | 153.7 mm (6.1 in) | 1962 | 56.6 mm (2.2 in) | 59 |
| Wettest five days (Rx5day) | 177.8 mm (7.0 in) | 1962 | 93.5 mm (3.7 in) | 59 |
| Longest dry spell (CDD) | 88 days | 1955 | 41 days | 59 |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1929 | 68.6 mm (2.7 in) |
| 1930 | 56.6 mm (2.2 in) |
| 1931 | 50.8 mm (2.0 in) |
| 1932 | 38.1 mm (1.5 in) |
| 1933 | 41.9 mm (1.6 in) |
| 1934 | 124.5 mm (4.9 in) |
| 1935 | 73.7 mm (2.9 in) |
| 1936 | 79.5 mm (3.1 in) |
| 1937 | 40.6 mm (1.6 in) |
| 1938 | 50.0 mm (2.0 in) |
| 1939 | 82.3 mm (3.2 in) |
| 1940 | 46.5 mm (1.8 in) |
| 1941 | 91.7 mm (3.6 in) |
| 1942 | 82.0 mm (3.2 in) |
| 1943 | 36.8 mm (1.4 in) |
| 1944 | 91.9 mm (3.6 in) |
| 1945 | 31.0 mm (1.2 in) |
| 1946 | 58.4 mm (2.3 in) |
| 1947 | 71.1 mm (2.8 in) |
| 1948 | 71.9 mm (2.8 in) |
| 1949 | 44.7 mm (1.8 in) |
| 1950 | 40.1 mm (1.6 in) |
| 1951 | 52.1 mm (2.1 in) |
| 1952 | 24.1 mm (0.9 in) |
| 1953 | 54.4 mm (2.1 in) |
| 1954 | 59.7 mm (2.4 in) |
| 1955 | 53.6 mm (2.1 in) |
| 1956 | 129.5 mm (5.1 in) |
| 1957 | 62.7 mm (2.5 in) |
| 1958 | 40.1 mm (1.6 in) |
| 1959 | 101.1 mm (4.0 in) |
| 1960 | 76.2 mm (3.0 in) |
| 1961 | 49.0 mm (1.9 in) |
| 1962 | 153.7 mm (6.1 in) |
| 1963 | 58.9 mm (2.3 in) |
| 1964 | 66.0 mm (2.6 in) |
| 1965 | 92.7 mm (3.6 in) |
| 1966 | 39.6 mm (1.6 in) |
| 1967 | 91.4 mm (3.6 in) |
| 1968 | 61.0 mm (2.4 in) |
| 1969 | 51.1 mm (2.0 in) |
| 1970 | 55.4 mm (2.2 in) |
| 1971 | 55.1 mm (2.2 in) |
| 1972 | 83.3 mm (3.3 in) |
| 1973 | 71.6 mm (2.8 in) |
| 1974 | 41.1 mm (1.6 in) |
| 1975 | 59.2 mm (2.3 in) |
| 1976 | 44.5 mm (1.8 in) |
| 1977 | 87.6 mm (3.4 in) |
| 1978 | 78.7 mm (3.1 in) |
| 1979 | 52.1 mm (2.1 in) |
| 1980 | 35.6 mm (1.4 in) |
| 1981 | 30.2 mm (1.2 in) |
| 1982 | 100.3 mm (3.9 in) |
| 1983 | 54.6 mm (2.1 in) |
| 1984 | 33.5 mm (1.3 in) |
| 1985 | 73.2 mm (2.9 in) |
| 1986 | 56.1 mm (2.2 in) |
| 1987 | 36.6 mm (1.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1929 | 106.9 mm (4.2 in) |
| 1930 | 81.5 mm (3.2 in) |
| 1931 | 98.1 mm (3.9 in) |
| 1932 | 65.5 mm (2.6 in) |
| 1933 | 59.7 mm (2.4 in) |
| 1934 | 124.5 mm (4.9 in) |
| 1935 | 119.5 mm (4.7 in) |
| 1936 | 84.6 mm (3.3 in) |
| 1937 | 75.7 mm (3.0 in) |
| 1938 | 103.8 mm (4.1 in) |
| 1939 | 107.2 mm (4.2 in) |
| 1940 | 77.2 mm (3.0 in) |
| 1941 | 142.1 mm (5.6 in) |
| 1942 | 155.2 mm (6.1 in) |
| 1943 | 69.8 mm (2.7 in) |
| 1944 | 166.9 mm (6.6 in) |
| 1945 | 44.2 mm (1.7 in) |
| 1946 | 155.4 mm (6.1 in) |
| 1947 | 105.7 mm (4.2 in) |
| 1948 | 86.6 mm (3.4 in) |
| 1949 | 63.7 mm (2.5 in) |
| 1950 | 90.1 mm (3.5 in) |
| 1951 | 80.5 mm (3.2 in) |
| 1952 | 59.8 mm (2.4 in) |
| 1953 | 94.8 mm (3.7 in) |
| 1954 | 74.2 mm (2.9 in) |
| 1955 | 84.8 mm (3.3 in) |
| 1956 | 144.7 mm (5.7 in) |
| 1957 | 81.5 mm (3.2 in) |
| 1958 | 70.6 mm (2.8 in) |
| 1959 | 146.3 mm (5.8 in) |
| 1960 | 85.1 mm (3.4 in) |
| 1961 | 128.6 mm (5.1 in) |
| 1962 | 177.8 mm (7.0 in) |
| 1963 | 122.2 mm (4.8 in) |
| 1964 | 97.4 mm (3.8 in) |
| 1965 | 145.3 mm (5.7 in) |
| 1966 | 58.7 mm (2.3 in) |
| 1967 | 122.0 mm (4.8 in) |
| 1968 | 78.5 mm (3.1 in) |
| 1969 | 118.7 mm (4.7 in) |
| 1970 | 65.8 mm (2.6 in) |
| 1971 | 79.3 mm (3.1 in) |
| 1972 | 98.3 mm (3.9 in) |
| 1973 | 103.4 mm (4.1 in) |
| 1974 | 81.1 mm (3.2 in) |
| 1975 | 77.2 mm (3.0 in) |
| 1976 | 75.3 mm (3.0 in) |
| 1977 | 150.1 mm (5.9 in) |
| 1978 | 131.8 mm (5.2 in) |
| 1979 | 87.2 mm (3.4 in) |
| 1980 | 71.2 mm (2.8 in) |
| 1981 | 66.8 mm (2.6 in) |
| 1982 | 117.3 mm (4.6 in) |
| 1983 | 115.0 mm (4.5 in) |
| 1984 | 62.0 mm (2.4 in) |
| 1985 | 108.2 mm (4.3 in) |
| 1986 | 93.5 mm (3.7 in) |
| 1987 | 101.1 mm (4.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1929 | 29 days |
| 1930 | 49 days |
| 1931 | 27 days |
| 1932 | 28 days |
| 1933 | 30 days |
| 1934 | 32 days |
| 1935 | 29 days |
| 1936 | 54 days |
| 1937 | 58 days |
| 1938 | 58 days |
| 1939 | 54 days |
| 1940 | 45 days |
| 1941 | 18 days |
| 1942 | 39 days |
| 1943 | 48 days |
| 1944 | 21 days |
| 1945 | 65 days |
| 1946 | 31 days |
| 1947 | 66 days |
| 1948 | 48 days |
| 1949 | 50 days |
| 1950 | 58 days |
| 1951 | 36 days |
| 1952 | 47 days |
| 1953 | 41 days |
| 1954 | 64 days |
| 1955 | 88 days |
| 1956 | 85 days |
| 1957 | 42 days |
| 1958 | 31 days |
| 1959 | 40 days |
| 1960 | 41 days |
| 1961 | 27 days |
| 1962 | 52 days |
| 1963 | 41 days |
| 1964 | 61 days |
| 1965 | 58 days |
| 1966 | 52 days |
| 1967 | 36 days |
| 1968 | 35 days |
| 1969 | 33 days |
| 1970 | 64 days |
| 1971 | 52 days |
| 1972 | 74 days |
| 1973 | 37 days |
| 1974 | 35 days |
| 1975 | 27 days |
| 1976 | 48 days |
| 1977 | 52 days |
| 1978 | 43 days |
| 1979 | 40 days |
| 1980 | 32 days |
| 1981 | 41 days |
| 1982 | 32 days |
| 1983 | 36 days |
| 1984 | 24 days |
| 1985 | 23 days |
| 1986 | 37 days |
| 1987 | 52 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.
Rainfall Return Levels
57 years, 1930 to 1986A day with at least 58.5 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 153.2 mm (6.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 58.5 mm (2.3 in) | |
| 5 years | 81.3 mm (3.2 in) | |
| 10 years | 97.4 mm (3.8 in) | |
| 25 years | 118.8 mm (4.7 in) | |
| 50 years | 135.7 mm (5.3 in) | |
| 100 years | 153.2 mm (6.0 in) | Longer than the 57 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, 57 years of values from 1930 to 1986.
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: 153.7 mm (6.1 in) in 1962; 129.5 mm (5.1 in) in 1956; 124.5 mm (4.9 in) in 1934.
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).