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Built 2026-10-19 (19 October 2026)

Frost Threshold Days by Year (USC00413379)

5 fixed thresholds counted per year at Frost (USC00413379): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Frost Thresholds

  • Frost: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1973 with 38.
  • Frost: days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 1959 with 22.
  • Frost: days with 50 mm (1.97 in) or more of precipitation in 28 years, most in 1957 with 7.
  • Frost: days with 100 mm (3.94 in) or more of precipitation in 7 years, most in 1962 with 2.
  • 5 fixed thresholds have at least one qualifying day at Frost.
32 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Frost Days per year at Frost with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 1973. 0102030401950: 251951: 251952: 281953: 251954: 201955: 291956: 211957: 351958: 311959: 361960: 341961: 311962: 231963: 161964: 251965: 291966: 251967: 291968: 281969: 271970: 211971: 241972: 191973: 381975: 271976: 231977: 241978: 231981: 271982: 281983: 321984: 2819501954195819621966197019751981
Days per year at Frost with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 1973.
Days with 10 mm (0.39 in) or more of precipitation per year at Frost
YearDaysDecade average
19502527.5
19512527.5
19522827.5
19532527.5
19542027.5
19552927.5
19562127.5
19573527.5
19583127.5
19593627.5
19603426.7
19613126.7
19622326.7
19631626.7
19642526.7
19652926.7
19662526.7
19672926.7
19682826.7
19692726.7
19702124.9
19712424.9
19721924.9
19733824.9
19752724.9
19762324.9
19772424.9
19782324.9
19812728.8
19822828.8
19833228.8
19842828.8
First to last qualifying date each year at Frost For each year, a bar from the first to the last day at Frost meeting 10 mm (0.39 in). 1950: 12 January 1950 to 16 November 19501951: 13 January 1951 to 4 December 19511952: 2 February 1952 to 30 December 19521953: 16 January 1953 to 28 December 19531954: 15 January 1954 to 15 November 19541955: 9 January 1955 to 1 December 19551956: 18 January 1956 to 19 December 19561957: 4 January 1957 to 25 December 19571958: 12 January 1958 to 30 December 19581959: 2 February 1959 to 31 December 19591960: 5 January 1960 to 31 December 19601961: 7 January 1961 to 9 December 19611962: 15 February 1962 to 21 December 19621963: 5 April 1963 to 10 December 19631964: 16 January 1964 to 10 December 19641965: 3 January 1965 to 18 December 19651966: 29 January 1966 to 16 December 19661967: 20 February 1967 to 31 December 19671968: 9 January 1968 to 21 December 19681969: 1 February 1969 to 29 December 19691970: 1 February 1970 to 30 December 19701971: 19 February 1971 to 10 December 19711972: 2 January 1972 to 15 December 19721973: 3 January 1973 to 24 December 19731975: 10 January 1975 to 25 December 19751976: 7 March 1976 to 11 December 19761977: 6 January 1977 to 29 November 19771978: 12 January 1978 to 31 December 19781981: 1 March 1981 to 29 November 19811982: 14 January 1982 to 27 December 19821983: 1 February 1983 to 27 November 19831984: 9 January 1984 to 18 December 198419501954195819621966197019751981JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Frost meeting 10 mm (0.39 in).
First to last qualifying date each year at Frost
YearFirst dateLast date
19501950-01-121950-11-16
19511951-01-131951-12-04
19521952-02-021952-12-30
19531953-01-161953-12-28
19541954-01-151954-11-15
19551955-01-091955-12-01
19561956-01-181956-12-19
19571957-01-041957-12-25
19581958-01-121958-12-30
19591959-02-021959-12-31
19601960-01-051960-12-31
19611961-01-071961-12-09
19621962-02-151962-12-21
19631963-04-051963-12-10
19641964-01-161964-12-10
19651965-01-031965-12-18
19661966-01-291966-12-16
19671967-02-201967-12-31
19681968-01-091968-12-21
19691969-02-011969-12-29
19701970-02-011970-12-30
19711971-02-191971-12-10
19721972-01-021972-12-15
19731973-01-031973-12-24
19751975-01-101975-12-25
19761976-03-071976-12-11
19771977-01-061977-11-29
19781978-01-121978-12-31
19811981-03-011981-11-29
19821982-01-141982-12-27
19831983-02-011983-11-27
19841984-01-091984-12-18

Every Fixed Threshold

Fixed thresholds at Frost
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3238197328
25 mm (0.98 in): Days with 25 mm or more rain3222195912
50 mm (1.97 in): Days with 50 mm or more rain28719574
100 mm (3.94 in): Days with 100 mm or more rain7219621
10 cm (3.9 in): Days with 10 cm or more snowfall4119641

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1950.

Download the Data

  • Data for Frost 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).