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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Speedwell Threshold Days by Year (USC00447971)

6 fixed thresholds counted per year at Speedwell (USC00447971): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Speedwell Thresholds

  • Speedwell: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1972 with 43.
  • Speedwell: days with 25 mm (0.98 in) or more of precipitation in 35 years, most in 1961 with 19.
  • Speedwell: days with 50 mm (1.97 in) or more of precipitation in 21 years, most in 1948 with 3.
  • Speedwell: days with 10 cm (3.9 in) or more of snowfall in 6 years, most in 1963 with 2.
  • 6 fixed thresholds have at least one qualifying day at Speedwell.
35 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Speedwell Days per year at Speedwell with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 43 in 1972. 02040601942: 421943: 361948: 371949: 381950: 261951: 321952: 301953: 361954: 311955: 311956: 361957: 351959: 271961: 401962: 361963: 231965: 281966: 311967: 321968: 301969: 381970: 331971: 411972: 431973: 401974: 331975: 241976: 311978: 291979: 371980: 351981: 341982: 421983: 391984: 34194219501954195919651969197319781982
Days per year at Speedwell with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 43 in 1972.
Days with 10 mm (0.39 in) or more of precipitation per year at Speedwell
YearDaysDecade average
19424238.3
19433638.3
19483738.3
19493838.3
19502631.6
19513231.6
19523031.6
19533631.6
19543131.6
19553131.6
19563631.6
19573531.6
19592731.6
19614032.3
19623632.3
19632332.3
19652832.3
19663132.3
19673232.3
19683032.3
19693832.3
19703334.6
19714134.6
19724334.6
19734034.6
19743334.6
19752434.6
19763134.6
19782934.6
19793734.6
19803536.8
19813436.8
19824236.8
19833936.8
19843436.8
First to last qualifying date each year at Speedwell For each year, a bar from the first to the last day at Speedwell meeting 10 mm (0.39 in). 1942: 1 January 1942 to 30 December 19421943: 19 January 1943 to 26 December 19431948: 24 January 1948 to 4 December 19481949: 24 January 1949 to 12 December 19491950: 16 January 1950 to 4 December 19501951: 24 January 1951 to 21 December 19511952: 10 January 1952 to 31 December 19521953: 10 January 1953 to 14 December 19531954: 16 January 1954 to 6 December 19541955: 11 January 1955 to 19 November 19551956: 24 January 1956 to 17 November 19561957: 29 January 1957 to 26 December 19571959: 22 January 1959 to 19 December 19591961: 15 January 1961 to 18 December 19611962: 16 January 1962 to 30 December 19621963: 12 February 1963 to 24 December 19631965: 10 January 1965 to 22 October 19651966: 6 January 1966 to 29 December 19661967: 27 January 1967 to 30 December 19671968: 11 January 1968 to 28 December 19681969: 20 January 1969 to 31 December 19691970: 13 March 1970 to 22 December 19701971: 1 January 1971 to 4 December 19711972: 11 January 1972 to 22 December 19721973: 4 January 1973 to 26 December 19731974: 1 January 1974 to 28 December 19741975: 20 January 1975 to 30 December 19751976: 26 January 1976 to 28 December 19761978: 9 January 1978 to 31 December 19781979: 20 January 1979 to 25 December 19791980: 14 January 1980 to 24 November 19801981: 2 February 1981 to 25 December 19811982: 2 January 1982 to 16 December 19821983: 10 January 1983 to 4 December 19831984: 11 January 1984 to 29 November 19841942195119561963196919741980JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Speedwell meeting 10 mm (0.39 in).
First to last qualifying date each year at Speedwell
YearFirst dateLast date
19421942-01-011942-12-30
19431943-01-191943-12-26
19481948-01-241948-12-04
19491949-01-241949-12-12
19501950-01-161950-12-04
19511951-01-241951-12-21
19521952-01-101952-12-31
19531953-01-101953-12-14
19541954-01-161954-12-06
19551955-01-111955-11-19
19561956-01-241956-11-17
19571957-01-291957-12-26
19591959-01-221959-12-19
19611961-01-151961-12-18
19621962-01-161962-12-30
19631963-02-121963-12-24
19651965-01-101965-10-22
19661966-01-061966-12-29
19671967-01-271967-12-30
19681968-01-111968-12-28
19691969-01-201969-12-31
19701970-03-131970-12-22
19711971-01-011971-12-04
19721972-01-111972-12-22
19731973-01-041973-12-26
19741974-01-011974-12-28
19751975-01-201975-12-30
19761976-01-261976-12-28
19781978-01-091978-12-31
19791979-01-201979-12-25
19801980-01-141980-11-24
19811981-02-021981-12-25
19821982-01-021982-12-16
19831983-01-101983-12-04
19841984-01-111984-11-29

Every Fixed Threshold

Fixed thresholds at Speedwell
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3543197234
25 mm (0.98 in): Days with 25 mm or more rain351919618
50 mm (1.97 in): Days with 50 mm or more rain21319481
100 mm (3.94 in): Days with 100 mm or more rain1119591
10 cm (3.9 in): Days with 10 cm or more snowfall6219631
25 cm (9.8 in): Days with 25 cm or more snowfall1119811

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1942.

Download the Data

  • Data for Speedwell 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).