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Built 2026-10-19 (19 October 2026)

Fairfax Threshold Days by Year (USC00232729)

6 fixed thresholds counted per year at Fairfax (USC00232729): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Fairfax Thresholds

  • Fairfax: days with 10 mm (0.39 in) or more of precipitation in 48 years, most in 1951 with 42.
  • Fairfax: days with 25 mm (0.98 in) or more of precipitation in 48 years, most in 1993 with 20.
  • Fairfax: days with 50 mm (1.97 in) or more of precipitation in 41 years, most in 1993 with 8.
  • Fairfax: days with 10 cm (3.9 in) or more of snowfall in 35 years, most in 1975 with 6.
  • 6 fixed thresholds have at least one qualifying day at Fairfax.
48 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Fairfax Days per year at Fairfax with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1951. 02040601949: 361950: 241951: 421952: 271953: 201954: 221955: 201960: 291961: 291963: 231964: 291965: 261966: 181967: 201968: 171969: 261970: 281971: 201972: 221973: 411974: 201975: 271976: 291977: 421978: 351979: 291980: 231981: 311982: 291983: 191984: 341985: 341986: 381987: 381989: 211990: 261991: 281992: 331993: 411994: 191995: 251996: 331997: 272000: 252001: 162002: 132008: 352009: 331949195419641969197419791984199019952002
Days per year at Fairfax with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1951.
Days with 10 mm (0.39 in) or more of precipitation per year at Fairfax
YearDaysDecade average
19493636
19502425.8
19514225.8
19522725.8
19532025.8
19542225.8
19552025.8
19602924.1
19612924.1
19632324.1
19642924.1
19652624.1
19661824.1
19672024.1
19681724.1
19692624.1
19702829.3
19712029.3
19722229.3
19734129.3
19742029.3
19752729.3
19762929.3
19774229.3
19783529.3
19792929.3
19802329.7
19813129.7
19822929.7
19831929.7
19843429.7
19853429.7
19863829.7
19873829.7
19892129.7
19902629
19912829
19923329
19934129
19941929
19952529
19963329
19972729
20002524.4
20011624.4
20021324.4
20083524.4
20093324.4
First to last qualifying date each year at Fairfax For each year, a bar from the first to the last day at Fairfax meeting 10 mm (0.39 in). 1949: 4 January 1949 to 13 November 19491950: 13 February 1950 to 7 October 19501951: 20 February 1951 to 12 November 19511952: 10 March 1952 to 26 November 19521953: 6 February 1953 to 3 December 19531954: 20 February 1954 to 5 December 19541955: 5 January 1955 to 27 September 19551960: 12 January 1960 to 5 December 19601961: 18 February 1961 to 9 December 19611963: 4 March 1963 to 21 November 19631964: 9 March 1964 to 10 December 19641965: 2 January 1965 to 24 December 19651966: 2 January 1966 to 28 December 19661967: 2 February 1967 to 15 October 19671968: 17 April 1968 to 19 December 19681969: 28 February 1969 to 7 December 19691970: 1 March 1970 to 20 November 19701971: 3 January 1971 to 29 November 19711972: 13 March 1972 to 29 December 19721973: 4 January 1973 to 4 December 19731974: 22 February 1974 to 10 November 19741975: 3 January 1975 to 30 November 19751976: 2 February 1976 to 4 October 19761977: 20 January 1977 to 9 November 19771978: 4 February 1978 to 3 December 19781979: 19 January 1979 to 21 November 19791980: 16 January 1980 to 8 December 19801981: 1 February 1981 to 28 December 19811982: 4 March 1982 to 28 December 19821983: 2 February 1983 to 28 November 19831984: 16 February 1984 to 16 December 19841985: 21 February 1985 to 19 October 19851986: 4 February 1986 to 1 December 19861987: 1 March 1987 to 29 November 19871989: 8 January 1989 to 29 October 19891990: 20 January 1990 to 7 November 19901991: 18 February 1991 to 20 December 19911992: 15 February 1992 to 14 December 19921993: 9 January 1993 to 13 December 19931994: 12 April 1994 to 21 November 19941995: 13 March 1995 to 31 October 19951996: 3 January 1996 to 17 November 19961997: 5 April 1997 to 8 December 19972000: 23 February 2000 to 7 November 20002001: 12 March 2001 to 8 September 20012002: 7 April 2002 to 30 October 20022008: 17 January 2008 to 4 December 20082009: 28 February 2009 to 9 December 200919491955196619721978198419911997JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Fairfax meeting 10 mm (0.39 in).
First to last qualifying date each year at Fairfax
YearFirst dateLast date
19491949-01-041949-11-13
19501950-02-131950-10-07
19511951-02-201951-11-12
19521952-03-101952-11-26
19531953-02-061953-12-03
19541954-02-201954-12-05
19551955-01-051955-09-27
19601960-01-121960-12-05
19611961-02-181961-12-09
19631963-03-041963-11-21
19641964-03-091964-12-10
19651965-01-021965-12-24
19661966-01-021966-12-28
19671967-02-021967-10-15
19681968-04-171968-12-19
19691969-02-281969-12-07
19701970-03-011970-11-20
19711971-01-031971-11-29
19721972-03-131972-12-29
19731973-01-041973-12-04
19741974-02-221974-11-10
19751975-01-031975-11-30
19761976-02-021976-10-04
19771977-01-201977-11-09
19781978-02-041978-12-03
19791979-01-191979-11-21
19801980-01-161980-12-08
19811981-02-011981-12-28
19821982-03-041982-12-28
19831983-02-021983-11-28
19841984-02-161984-12-16
19851985-02-211985-10-19
19861986-02-041986-12-01
19871987-03-011987-11-29
19891989-01-081989-10-29
19901990-01-201990-11-07
19911991-02-181991-12-20
19921992-02-151992-12-14
19931993-01-091993-12-13
19941994-04-121994-11-21
19951995-03-131995-10-31
19961996-01-031996-11-17
19971997-04-051997-12-08
20002000-02-232000-11-07
20012001-03-122001-09-08
20022002-04-072002-10-30
20082008-01-172008-12-04
20092009-02-282009-12-09

Every Fixed Threshold

Fixed thresholds at Fairfax
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4842195133
25 mm (0.98 in): Days with 25 mm or more rain482019938
50 mm (1.97 in): Days with 50 mm or more rain41819933
100 mm (3.94 in): Days with 100 mm or more rain4219922
10 cm (3.9 in): Days with 10 cm or more snowfall35619752
25 cm (9.8 in): Days with 25 cm or more snowfall4119611

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

  • Data for Fairfax 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).