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Built 2026-10-19 (19 October 2026)

Rocky River (Brookland Park) Threshold Days by Year (ASN00022820)

3 fixed thresholds counted per year at Rocky River (Brookland Park) (ASN00022820): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rocky River (Brookland Park) Thresholds

  • Rocky River (Brookland Park): days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1992 with 42.
  • Rocky River (Brookland Park): days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1981 with 11.
  • Rocky River (Brookland Park): days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1966 with 2.
  • 3 fixed thresholds have at least one qualifying day at Rocky River (Brookland Park).
45 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Rocky River (Brookland Park) Days per year at Rocky River (Brookland Park) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1992. 02040601955: 361956: 301957: 211958: 201959: 151960: 261961: 131962: 191963: 201964: 341965: 181966: 241967: 181968: 361969: 201971: 311972: 291973: 311974: 281975: 281976: 191977: 201978: 261979: 291980: 231981: 361982: 181983: 301984: 281985: 191986: 221987: 221988: 241989: 291990: 321991: 201992: 421993: 201994: 131995: 211996: 331997: 271998: 212005: 232018: 28195519601965197119761981198619911996
Days per year at Rocky River (Brookland Park) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1992.
Days with 10 mm (0.39 in) or more of precipitation per year at Rocky River (Brookland Park)
YearDaysDecade average
19553624.4
19563024.4
19572124.4
19582024.4
19591524.4
19602622.8
19611322.8
19621922.8
19632022.8
19643422.8
19651822.8
19662422.8
19671822.8
19683622.8
19692022.8
19713126.8
19722926.8
19733126.8
19742826.8
19752826.8
19761926.8
19772026.8
19782626.8
19792926.8
19802325.1
19813625.1
19821825.1
19833025.1
19842825.1
19851925.1
19862225.1
19872225.1
19882425.1
19892925.1
19903225.4
19912025.4
19924225.4
19932025.4
19941325.4
19952125.4
19963325.4
19972725.4
19982125.4
20052323
20182828
First to last qualifying date each year at Rocky River (Brookland Park) For each year, a bar from the first to the last day at Rocky River (Brookland Park) meeting 10 mm (0.39 in). 1955: 13 April 1955 to 25 November 19551956: 3 March 1956 to 17 October 19561957: 13 March 1957 to 18 November 19571958: 14 May 1958 to 10 October 19581959: 13 February 1959 to 26 December 19591960: 17 January 1960 to 17 September 19601961: 5 April 1961 to 20 October 19611962: 28 March 1962 to 29 December 19621963: 13 January 1963 to 28 October 19631964: 1 February 1964 to 23 December 19641965: 16 April 1965 to 24 November 19651966: 21 March 1966 to 4 December 19661967: 23 February 1967 to 6 October 19671968: 24 March 1968 to 25 October 19681969: 14 January 1969 to 21 September 19691971: 26 March 1971 to 23 December 19711972: 11 January 1972 to 2 November 19721973: 18 March 1973 to 2 December 19731974: 30 January 1974 to 12 November 19741975: 25 January 1975 to 23 November 19751976: 9 January 1976 to 23 December 19761977: 15 March 1977 to 29 November 19771978: 7 May 1978 to 4 December 19781979: 24 February 1979 to 15 November 19791980: 18 April 1980 to 5 November 19801981: 27 January 1981 to 15 November 19811982: 15 February 1982 to 10 August 19821983: 1 March 1983 to 6 December 19831984: 25 March 1984 to 1 November 19841985: 15 March 1985 to 23 October 19851986: 15 April 1986 to 7 December 19861987: 2 May 1987 to 9 December 19871988: 14 January 1988 to 21 November 19881989: 12 April 1989 to 5 November 19891990: 14 April 1990 to 22 December 19901991: 25 April 1991 to 26 September 19911992: 1 March 1992 to 25 December 19921993: 21 January 1993 to 22 December 19931994: 17 May 1994 to 22 December 19941995: 28 February 1995 to 24 September 19951996: 1 January 1996 to 30 September 19961997: 14 January 1997 to 9 December 19971998: 24 January 1998 to 6 October 19982005: 19 February 2005 to 15 December 20052018: 21 February 2018 to 20 December 201819551961196719741980198619921998JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rocky River (Brookland Park) meeting 10 mm (0.39 in).
First to last qualifying date each year at Rocky River (Brookland Park)
YearFirst dateLast date
19551955-04-131955-11-25
19561956-03-031956-10-17
19571957-03-131957-11-18
19581958-05-141958-10-10
19591959-02-131959-12-26
19601960-01-171960-09-17
19611961-04-051961-10-20
19621962-03-281962-12-29
19631963-01-131963-10-28
19641964-02-011964-12-23
19651965-04-161965-11-24
19661966-03-211966-12-04
19671967-02-231967-10-06
19681968-03-241968-10-25
19691969-01-141969-09-21
19711971-03-261971-12-23
19721972-01-111972-11-02
19731973-03-181973-12-02
19741974-01-301974-11-12
19751975-01-251975-11-23
19761976-01-091976-12-23
19771977-03-151977-11-29
19781978-05-071978-12-04
19791979-02-241979-11-15
19801980-04-181980-11-05
19811981-01-271981-11-15
19821982-02-151982-08-10
19831983-03-011983-12-06
19841984-03-251984-11-01
19851985-03-151985-10-23
19861986-04-151986-12-07
19871987-05-021987-12-09
19881988-01-141988-11-21
19891989-04-121989-11-05
19901990-04-141990-12-22
19911991-04-251991-09-26
19921992-03-011992-12-25
19931993-01-211993-12-22
19941994-05-171994-12-22
19951995-02-281995-09-24
19961996-01-011996-09-30
19971997-01-141997-12-09
19981998-01-241998-10-06
20052005-02-192005-12-15
20182018-02-212018-12-20

Every Fixed Threshold

Fixed thresholds at Rocky River (Brookland Park)
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4542199228
25 mm (0.98 in): Days with 25 mm or more rain421119816
50 mm (1.97 in): Days with 50 mm or more rain16219661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

  • Data for Rocky River (Brookland Park) 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).