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Built 2026-10-19 (19 October 2026)

Chapman Hill Threshold Days by Year (ASN00009803)

4 fixed thresholds counted per year at Chapman Hill (ASN00009803): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chapman Hill Thresholds

  • Chapman Hill: days with 10 mm (0.39 in) or more of precipitation in 48 years, most in 1963 with 42.
  • Chapman Hill: days with 25 mm (0.98 in) or more of precipitation in 47 years, most in 1963 with 15.
  • Chapman Hill: days with 50 mm (1.97 in) or more of precipitation in 31 years, most in 1967 with 4.
  • Chapman Hill: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1997 with 1.
  • 4 fixed thresholds have at least one qualifying day at Chapman Hill.
48 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Chapman Hill Days per year at Chapman Hill with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1963. 02040601951: 311952: 251954: 261955: 381956: 321957: 371958: 261959: 241960: 221961: 291962: 281963: 421964: 381965: 341966: 291967: 331968: 241969: 141970: 301973: 281976: 201977: 201982: 261983: 301987: 151989: 241990: 261992: 171993: 171994: 151995: 231997: 232002: 172004: 162006: 122008: 132013: 292016: 282017: 202018: 222019: 252020: 242021: 282022: 232023: 182024: 252025: 322026: 191951195719621967197619891995200820192024
Days per year at Chapman Hill with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1963.
Days with 10 mm (0.39 in) or more of precipitation per year at Chapman Hill
YearDaysDecade average
19513129.9
19522529.9
19542629.9
19553829.9
19563229.9
19573729.9
19582629.9
19592429.9
19602229.3
19612929.3
19622829.3
19634229.3
19643829.3
19653429.3
19662929.3
19673329.3
19682429.3
19691429.3
19703024.5
19732824.5
19762024.5
19772024.5
19822623.8
19833023.8
19871523.8
19892423.8
19902620.2
19921720.2
19931720.2
19941520.2
19952320.2
19972320.2
20021714.5
20041614.5
20061214.5
20081314.5
20132924.8
20162824.8
20172024.8
20182224.8
20192524.8
20202424.1
20212824.1
20222324.1
20231824.1
20242524.1
20253224.1
20261924.1
First to last qualifying date each year at Chapman Hill For each year, a bar from the first to the last day at Chapman Hill meeting 10 mm (0.39 in). 1951: 13 January 1951 to 5 December 19511952: 1 May 1952 to 15 October 19521954: 22 April 1954 to 10 November 19541955: 17 February 1955 to 27 October 19551956: 3 March 1956 to 4 December 19561957: 18 March 1957 to 4 October 19571958: 27 January 1958 to 7 December 19581959: 17 January 1959 to 31 December 19591960: 1 January 1960 to 23 September 19601961: 26 March 1961 to 15 December 19611962: 21 April 1962 to 27 December 19621963: 30 January 1963 to 17 October 19631964: 11 April 1964 to 17 December 19641965: 1 March 1965 to 20 December 19651966: 20 April 1966 to 27 December 19661967: 12 April 1967 to 24 December 19671968: 7 January 1968 to 21 October 19681969: 8 April 1969 to 3 November 19691970: 6 February 1970 to 4 November 19701973: 16 April 1973 to 30 September 19731976: 7 January 1976 to 3 October 19761977: 15 May 1977 to 2 December 19771982: 22 January 1982 to 6 October 19821983: 5 February 1983 to 7 November 19831987: 8 April 1987 to 24 December 19871989: 27 February 1989 to 14 November 19891990: 26 March 1990 to 29 October 19901992: 17 March 1992 to 29 December 19921993: 4 April 1993 to 4 September 19931994: 22 May 1994 to 14 October 19941995: 10 May 1995 to 18 October 19951997: 24 February 1997 to 9 October 19972002: 22 April 2002 to 1 November 20022004: 7 May 2004 to 6 October 20042006: 25 January 2006 to 29 November 20062008: 1 April 2008 to 25 October 20082013: 15 March 2013 to 30 November 20132016: 19 January 2016 to 12 December 20162017: 14 February 2017 to 18 December 20172018: 16 January 2018 to 14 October 20182019: 23 January 2019 to 3 November 20192020: 15 March 2020 to 10 November 20202021: 7 February 2021 to 27 October 20212022: 27 March 2022 to 6 October 20222023: 17 March 2023 to 16 September 20232024: 2 May 2024 to 20 November 20242025: 14 March 2025 to 6 November 20252026: 28 March 2026 to 19 September 202619511958196419701987199520132021JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Chapman Hill meeting 10 mm (0.39 in).
First to last qualifying date each year at Chapman Hill
YearFirst dateLast date
19511951-01-131951-12-05
19521952-05-011952-10-15
19541954-04-221954-11-10
19551955-02-171955-10-27
19561956-03-031956-12-04
19571957-03-181957-10-04
19581958-01-271958-12-07
19591959-01-171959-12-31
19601960-01-011960-09-23
19611961-03-261961-12-15
19621962-04-211962-12-27
19631963-01-301963-10-17
19641964-04-111964-12-17
19651965-03-011965-12-20
19661966-04-201966-12-27
19671967-04-121967-12-24
19681968-01-071968-10-21
19691969-04-081969-11-03
19701970-02-061970-11-04
19731973-04-161973-09-30
19761976-01-071976-10-03
19771977-05-151977-12-02
19821982-01-221982-10-06
19831983-02-051983-11-07
19871987-04-081987-12-24
19891989-02-271989-11-14
19901990-03-261990-10-29
19921992-03-171992-12-29
19931993-04-041993-09-04
19941994-05-221994-10-14
19951995-05-101995-10-18
19971997-02-241997-10-09
20022002-04-222002-11-01
20042004-05-072004-10-06
20062006-01-252006-11-29
20082008-04-012008-10-25
20132013-03-152013-11-30
20162016-01-192016-12-12
20172017-02-142017-12-18
20182018-01-162018-10-14
20192019-01-232019-11-03
20202020-03-152020-11-10
20212021-02-072021-10-27
20222022-03-272022-10-06
20232023-03-172023-09-16
20242024-05-022024-11-20
20252025-03-142025-11-06
20262026-03-282026-09-19

Every Fixed Threshold

Fixed thresholds at Chapman Hill
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4842196319
25 mm (0.98 in): Days with 25 mm or more rain471519632
50 mm (1.97 in): Days with 50 mm or more rain31419672
100 mm (3.94 in): Days with 100 mm or more rain1119971

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

  • Data for Chapman Hill 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 (2026-10-12).