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Built 2026-10-19 (19 October 2026)

Aliso Canyon Oat Mtn F Threshold Days by Year (USC00040115)

4 fixed thresholds counted per year at Aliso Canyon Oat Mtn F (USC00040115): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Aliso Canyon Oat Mtn F Thresholds

  • Aliso Canyon Oat Mtn F: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1983 with 39.
  • Aliso Canyon Oat Mtn F: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1983 with 23.
  • Aliso Canyon Oat Mtn F: days with 50 mm (1.97 in) or more of precipitation in 32 years, most in 1969 with 8.
  • Aliso Canyon Oat Mtn F: days with 100 mm (3.94 in) or more of precipitation in 8 years, most in 1965 with 2.
  • 4 fixed thresholds have at least one qualifying day at Aliso Canyon Oat Mtn F.
36 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Aliso Canyon Oat Mtn F Days per year at Aliso Canyon Oat Mtn F with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 39 in 1983. 0102030401949: 101950: 111951: 211952: 251953: 21954: 51955: 201956: 101957: 231958: 181959: 71960: 161961: 81962: 131963: 151964: 141965: 231966: 91967: 231968: 111969: 191970: 181971: 161972: 31973: 211974: 151975: 121976: 131977: 131981: 151982: 151983: 391984: 111985: 111986: 161987: 12194919531957196119651969197319771984
Days per year at Aliso Canyon Oat Mtn F with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 39 in 1983.
Days with 10 mm (0.39 in) or more of precipitation per year at Aliso Canyon Oat Mtn F
YearDaysDecade average
19491010
19501114.2
19512114.2
19522514.2
1953214.2
1954514.2
19552014.2
19561014.2
19572314.2
19581814.2
1959714.2
19601615.1
1961815.1
19621315.1
19631515.1
19641415.1
19652315.1
1966915.1
19672315.1
19681115.1
19691915.1
19701813.9
19711613.9
1972313.9
19732113.9
19741513.9
19751213.9
19761313.9
19771313.9
19811517
19821517
19833917
19841117
19851117
19861617
19871217
First to last qualifying date each year at Aliso Canyon Oat Mtn F For each year, a bar from the first to the last day at Aliso Canyon Oat Mtn F meeting 10 mm (0.39 in). 1949: 19 January 1949 to 18 December 19491950: 8 January 1950 to 19 November 19501951: 10 January 1951 to 30 December 19511952: 7 January 1952 to 30 December 19521953: 31 March 1953 to 30 April 19531954: 18 February 1954 to 10 December 19541955: 1 January 1955 to 25 December 19551956: 25 January 1956 to 5 December 19561957: 5 January 1957 to 17 December 19571958: 25 January 1958 to 25 October 19581959: 6 January 1959 to 24 December 19591960: 10 January 1960 to 26 November 19601961: 25 January 1961 to 14 December 19611962: 20 January 1962 to 14 October 19621963: 31 January 1963 to 20 November 19631964: 21 January 1964 to 27 December 19641965: 7 January 1965 to 29 December 19651966: 30 January 1966 to 6 December 19661967: 22 January 1967 to 18 December 19671968: 27 January 1968 to 25 December 19681969: 14 January 1969 to 7 November 19691970: 16 January 1970 to 21 December 19701971: 12 January 1971 to 28 December 19711972: 11 November 1972 to 16 November 19721973: 9 January 1973 to 1 December 19731974: 1 January 1974 to 28 December 19741975: 3 February 1975 to 11 October 19751976: 6 February 1976 to 30 December 19761977: 3 January 1977 to 29 December 19771981: 23 January 1981 to 30 December 19811982: 1 January 1982 to 23 December 19821983: 19 January 1983 to 26 December 19831984: 14 March 1984 to 27 December 19841985: 29 January 1985 to 3 December 19851986: 5 January 1986 to 18 November 19861987: 5 January 1987 to 17 December 198719491954195919641969197419821987JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Aliso Canyon Oat Mtn F meeting 10 mm (0.39 in).
First to last qualifying date each year at Aliso Canyon Oat Mtn F
YearFirst dateLast date
19491949-01-191949-12-18
19501950-01-081950-11-19
19511951-01-101951-12-30
19521952-01-071952-12-30
19531953-03-311953-04-30
19541954-02-181954-12-10
19551955-01-011955-12-25
19561956-01-251956-12-05
19571957-01-051957-12-17
19581958-01-251958-10-25
19591959-01-061959-12-24
19601960-01-101960-11-26
19611961-01-251961-12-14
19621962-01-201962-10-14
19631963-01-311963-11-20
19641964-01-211964-12-27
19651965-01-071965-12-29
19661966-01-301966-12-06
19671967-01-221967-12-18
19681968-01-271968-12-25
19691969-01-141969-11-07
19701970-01-161970-12-21
19711971-01-121971-12-28
19721972-11-111972-11-16
19731973-01-091973-12-01
19741974-01-011974-12-28
19751975-02-031975-10-11
19761976-02-061976-12-30
19771977-01-031977-12-29
19811981-01-231981-12-30
19821982-01-011982-12-23
19831983-01-191983-12-26
19841984-03-141984-12-27
19851985-01-291985-12-03
19861986-01-051986-11-18
19871987-01-051987-12-17

Every Fixed Threshold

Fixed thresholds at Aliso Canyon Oat Mtn F
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3639198312
25 mm (0.98 in): Days with 25 mm or more rain362319835
50 mm (1.97 in): Days with 50 mm or more rain32819691
100 mm (3.94 in): Days with 100 mm or more rain8219651

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

  • Data for Aliso Canyon Oat Mtn F threshold days by year: CSV or JSON. Field meanings are on the data page.

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). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).