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Built 2026-10-19 (19 October 2026)

Overton Threshold Days by Year (USC00416722)

6 fixed thresholds counted per year at Overton (USC00416722): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Overton Thresholds

  • Overton: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1973 with 55.
  • Overton: days with 25 mm (0.98 in) or more of precipitation in 40 years, most in 1946 with 23.
  • Overton: days with 50 mm (1.97 in) or more of precipitation in 39 years, most in 1944 with 7.
  • Overton: days with 100 mm (3.94 in) or more of precipitation in 14 years, most in 1946 with 1.
  • 6 fixed thresholds have at least one qualifying day at Overton.
40 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Overton Days per year at Overton with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 55 in 1973. 02040601944: 501946: 441947: 321948: 311949: 421950: 321951: 281952: 321953: 391954: 261955: 271956: 271957: 481958: 391959: 481960: 501961: 441962: 321963: 231964: 241965: 351966: 361967: 251968: 521969: 361970: 351971: 251972: 351973: 551974: 461975: 341976: 431977: 231978: 241979: 411980: 251983: 391984: 401985: 441986: 421944194919531957196119651969197319771983
Days per year at Overton with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 55 in 1973.
Days with 10 mm (0.39 in) or more of precipitation per year at Overton
YearDaysDecade average
19445039.8
19464439.8
19473239.8
19483139.8
19494239.8
19503234.6
19512834.6
19523234.6
19533934.6
19542634.6
19552734.6
19562734.6
19574834.6
19583934.6
19594834.6
19605035.7
19614435.7
19623235.7
19632335.7
19642435.7
19653535.7
19663635.7
19672535.7
19685235.7
19693635.7
19703536.1
19712536.1
19723536.1
19735536.1
19744636.1
19753436.1
19764336.1
19772336.1
19782436.1
19794136.1
19802538
19833938
19844038
19854438
19864238
First to last qualifying date each year at Overton For each year, a bar from the first to the last day at Overton meeting 10 mm (0.39 in). 1944: 1 January 1944 to 30 December 19441946: 3 January 1946 to 20 December 19461947: 11 January 1947 to 15 December 19471948: 1 January 1948 to 29 December 19481949: 16 January 1949 to 26 December 19491950: 1 January 1950 to 3 November 19501951: 14 January 1951 to 14 December 19511952: 3 January 1952 to 31 December 19521953: 16 January 1953 to 28 December 19531954: 14 January 1954 to 28 December 19541955: 10 January 1955 to 1 December 19551956: 18 January 1956 to 18 December 19561957: 23 January 1957 to 27 December 19571958: 13 January 1958 to 28 November 19581959: 8 January 1959 to 27 December 19591960: 1 January 1960 to 31 December 19601961: 7 January 1961 to 16 December 19611962: 3 January 1962 to 24 December 19621963: 4 January 1963 to 21 December 19631964: 6 January 1964 to 10 December 19641965: 3 January 1965 to 19 December 19651966: 2 January 1966 to 31 December 19661967: 18 February 1967 to 31 December 19671968: 3 January 1968 to 22 December 19681969: 30 January 1969 to 30 December 19691970: 6 January 1970 to 21 December 19701971: 12 February 1971 to 15 December 19711972: 1 January 1972 to 15 December 19721973: 3 January 1973 to 24 December 19731974: 3 January 1974 to 31 December 19741975: 2 January 1975 to 25 December 19751976: 20 January 1976 to 11 December 19761977: 14 January 1977 to 17 December 19771978: 12 January 1978 to 30 December 19781979: 1 January 1979 to 23 December 19791980: 22 January 1980 to 26 November 19801983: 1 January 1983 to 22 December 19831984: 9 January 1984 to 31 December 19841985: 10 January 1985 to 16 December 19851986: 17 January 1986 to 23 December 198619441950195519601965197019751980JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Overton meeting 10 mm (0.39 in).
First to last qualifying date each year at Overton
YearFirst dateLast date
19441944-01-011944-12-30
19461946-01-031946-12-20
19471947-01-111947-12-15
19481948-01-011948-12-29
19491949-01-161949-12-26
19501950-01-011950-11-03
19511951-01-141951-12-14
19521952-01-031952-12-31
19531953-01-161953-12-28
19541954-01-141954-12-28
19551955-01-101955-12-01
19561956-01-181956-12-18
19571957-01-231957-12-27
19581958-01-131958-11-28
19591959-01-081959-12-27
19601960-01-011960-12-31
19611961-01-071961-12-16
19621962-01-031962-12-24
19631963-01-041963-12-21
19641964-01-061964-12-10
19651965-01-031965-12-19
19661966-01-021966-12-31
19671967-02-181967-12-31
19681968-01-031968-12-22
19691969-01-301969-12-30
19701970-01-061970-12-21
19711971-02-121971-12-15
19721972-01-011972-12-15
19731973-01-031973-12-24
19741974-01-031974-12-31
19751975-01-021975-12-25
19761976-01-201976-12-11
19771977-01-141977-12-17
19781978-01-121978-12-30
19791979-01-011979-12-23
19801980-01-221980-11-26
19831983-01-011983-12-22
19841984-01-091984-12-31
19851985-01-101985-12-16
19861986-01-171986-12-23

Every Fixed Threshold

Fixed thresholds at Overton
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4055197342
25 mm (0.98 in): Days with 25 mm or more rain4023194615
50 mm (1.97 in): Days with 50 mm or more rain39719445
100 mm (3.94 in): Days with 100 mm or more rain14119461
200 mm (7.87 in): Days with 200 mm or more rain1119591
10 cm (3.9 in): Days with 10 cm or more snowfall4119441

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1944.

Download the Data

  • Data for Overton 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).