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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Rock Hill Threshold Days by Year

4 fixed thresholds counted per year at Rock Hill (ASN00010867): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rock Hill Thresholds

  • Rock Hill: days with 10 mm (0.39 in) or more of precipitation in 22 years, most in 1974 with 19.
  • Rock Hill: days with 25 mm (0.98 in) or more of precipitation in 17 years, most in 1976 with 5.
  • Rock Hill: days with 50 mm (1.97 in) or more of precipitation in 3 years, most in 1971 with 1.
  • Rock Hill: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1982 with 1.
  • 4 fixed thresholds have at least one qualifying day at Rock Hill.
22 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Rock Hill Days per year at Rock Hill with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 19 in 1974. 051015201971: 151972: 51973: 101974: 191975: 81976: 111977: 81978: 81979: 21980: 91981: 131982: 71983: 141984: 101987: 91988: 131989: 111990: 111991: 141992: 131993: 91995: 919711974197719801983198819911995
Days per year at Rock Hill with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 19 in 1974.
Days with 10 mm (0.39 in) or more of precipitation per year at Rock Hill
YearDaysDecade average
1971159.6
197259.6
1973109.6
1974199.6
197589.6
1976119.6
197789.6
197889.6
197929.6
1980910.8
19811310.8
1982710.8
19831410.8
19841010.8
1987910.8
19881310.8
19891110.8
19901111.2
19911411.2
19921311.2
1993911.2
1995911.2
First to last qualifying date each year at Rock Hill For each year, a bar from the first to the last day at Rock Hill meeting 10 mm (0.39 in). 1971: 31 January 1971 to 26 November 19711972: 21 June 1972 to 7 October 19721973: 8 January 1973 to 14 November 19731974: 4 April 1974 to 19 November 19741975: 2 April 1975 to 24 August 19751976: 7 January 1976 to 3 September 19761977: 16 May 1977 to 24 November 19771978: 24 February 1978 to 25 November 19781979: 15 July 1979 to 19 August 19791980: 11 February 1980 to 30 December 19801981: 18 February 1981 to 26 November 19811982: 21 January 1982 to 13 November 19821983: 27 February 1983 to 17 November 19831984: 6 March 1984 to 17 November 19841987: 8 April 1987 to 24 December 19871988: 28 April 1988 to 6 September 19881989: 26 February 1989 to 18 October 19891990: 13 February 1990 to 2 October 19901991: 17 January 1991 to 24 December 19911992: 9 February 1992 to 19 November 19921993: 6 February 1993 to 9 November 19931995: 25 February 1995 to 18 October 199519711974197719801983198819911995JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rock Hill meeting 10 mm (0.39 in).
First to last qualifying date each year at Rock Hill
YearFirst dateLast date
19711971-01-311971-11-26
19721972-06-211972-10-07
19731973-01-081973-11-14
19741974-04-041974-11-19
19751975-04-021975-08-24
19761976-01-071976-09-03
19771977-05-161977-11-24
19781978-02-241978-11-25
19791979-07-151979-08-19
19801980-02-111980-12-30
19811981-02-181981-11-26
19821982-01-211982-11-13
19831983-02-271983-11-17
19841984-03-061984-11-17
19871987-04-081987-12-24
19881988-04-281988-09-06
19891989-02-261989-10-18
19901990-02-131990-10-02
19911991-01-171991-12-24
19921992-02-091992-11-19
19931993-02-061993-11-09
19951995-02-251995-10-18

Every Fixed Threshold

Fixed thresholds at Rock Hill
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain221919749
25 mm (0.98 in): Days with 25 mm or more rain17519761
50 mm (1.97 in): Days with 50 mm or more rain3119711
100 mm (3.94 in): Days with 100 mm or more rain1119821

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.

Download the Data

  • Data for Rock 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

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