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Built 2026-10-16 (16 October 2026)

Alfalfa Threshold Days by Year

4 fixed thresholds counted per year at Alfalfa (ASN00041328): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alfalfa Thresholds

  • Alfalfa: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 1978 with 32.
  • Alfalfa: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1964 with 11.
  • Alfalfa: days with 50 mm (1.97 in) or more of precipitation in 24 years, most in 1983 with 4.
  • Alfalfa: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1988 with 2.
  • 4 fixed thresholds have at least one qualifying day at Alfalfa.
37 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Alfalfa Days per year at Alfalfa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1978. 0102030401959: 251960: 211961: 241962: 281963: 221964: 271965: 171966: 221967: 191968: 251969: 121970: 201971: 231972: 281973: 251974: 231975: 271976: 221977: 191978: 321979: 181980: 151981: 241982: 211983: 291984: 271985: 241986: 171987: 211988: 261989: 151990: 151991: 141992: 211993: 181994: 161995: 301959196319671971197519791983198719911995
Days per year at Alfalfa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1978.
Days with 10 mm (0.39 in) or more of precipitation per year at Alfalfa
YearDaysDecade average
19592525
19602121.7
19612421.7
19622821.7
19632221.7
19642721.7
19651721.7
19662221.7
19671921.7
19682521.7
19691221.7
19702023.7
19712323.7
19722823.7
19732523.7
19742323.7
19752723.7
19762223.7
19771923.7
19783223.7
19791823.7
19801521.9
19812421.9
19822121.9
19832921.9
19842721.9
19852421.9
19861721.9
19872121.9
19882621.9
19891521.9
19901519
19911419
19922119
19931819
19941619
19953019
First to last qualifying date each year at Alfalfa For each year, a bar from the first to the last day at Alfalfa meeting 10 mm (0.39 in). 1959: 2 January 1959 to 23 December 19591960: 6 January 1960 to 16 December 19601961: 16 January 1961 to 20 December 19611962: 1 January 1962 to 31 December 19621963: 11 January 1963 to 31 December 19631964: 22 January 1964 to 28 December 19641965: 7 January 1965 to 15 December 19651966: 21 February 1966 to 31 December 19661967: 5 January 1967 to 29 December 19671968: 5 January 1968 to 22 December 19681969: 12 February 1969 to 24 December 19691970: 1 January 1970 to 29 December 19701971: 13 January 1971 to 28 December 19711972: 14 January 1972 to 31 December 19721973: 3 January 1973 to 26 December 19731974: 12 January 1974 to 30 December 19741975: 6 January 1975 to 23 December 19751976: 1 January 1976 to 24 December 19761977: 12 January 1977 to 15 November 19771978: 5 January 1978 to 30 December 19781979: 19 January 1979 to 22 December 19791980: 28 January 1980 to 31 December 19801981: 1 January 1981 to 25 December 19811982: 6 January 1982 to 30 December 19821983: 1 January 1983 to 11 December 19831984: 5 January 1984 to 27 December 19841985: 25 January 1985 to 23 December 19851986: 25 January 1986 to 27 December 19861987: 4 January 1987 to 12 December 19871988: 16 January 1988 to 18 December 19881989: 2 February 1989 to 23 December 19891990: 12 January 1990 to 4 December 19901991: 6 January 1991 to 13 December 19911992: 1 January 1992 to 10 December 19921993: 7 January 1993 to 23 December 19931994: 12 February 1994 to 26 December 19941995: 7 January 1995 to 24 December 199519591964196919741979198419891994JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alfalfa meeting 10 mm (0.39 in).
First to last qualifying date each year at Alfalfa
YearFirst dateLast date
19591959-01-021959-12-23
19601960-01-061960-12-16
19611961-01-161961-12-20
19621962-01-011962-12-31
19631963-01-111963-12-31
19641964-01-221964-12-28
19651965-01-071965-12-15
19661966-02-211966-12-31
19671967-01-051967-12-29
19681968-01-051968-12-22
19691969-02-121969-12-24
19701970-01-011970-12-29
19711971-01-131971-12-28
19721972-01-141972-12-31
19731973-01-031973-12-26
19741974-01-121974-12-30
19751975-01-061975-12-23
19761976-01-011976-12-24
19771977-01-121977-11-15
19781978-01-051978-12-30
19791979-01-191979-12-22
19801980-01-281980-12-31
19811981-01-011981-12-25
19821982-01-061982-12-30
19831983-01-011983-12-11
19841984-01-051984-12-27
19851985-01-251985-12-23
19861986-01-251986-12-27
19871987-01-041987-12-12
19881988-01-161988-12-18
19891989-02-021989-12-23
19901990-01-121990-12-04
19911991-01-061991-12-13
19921992-01-011992-12-10
19931993-01-071993-12-23
19941994-02-121994-12-26
19951995-01-071995-12-24

Every Fixed Threshold

Fixed thresholds at Alfalfa
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3732197830
25 mm (0.98 in): Days with 25 mm or more rain371119647
50 mm (1.97 in): Days with 50 mm or more rain24419833
100 mm (3.94 in): Days with 100 mm or more rain2219882

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1959.

Download the Data

  • Data for Alfalfa 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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