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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Reston Threshold Days by Year (USC00357112)

6 fixed thresholds counted per year at Reston (USC00357112): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Reston Thresholds

  • Reston: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 1996 with 70.
  • Reston: days with 25 mm (0.98 in) or more of precipitation in 53 years, most in 1971 with 21.
  • Reston: days with 50 mm (1.97 in) or more of precipitation in 47 years, most in 1971 with 5.
  • Reston: days with 10 cm (3.9 in) or more of snowfall in 5 years, most in 1965 with 3.
  • 6 fixed thresholds have at least one qualifying day at Reston.
53 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Reston Days per year at Reston with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 70 in 1996. 0204060801910: 331911: 371912: 521913: 381914: 441915: 361916: 441956: 351957: 471958: 421959: 311960: 351962: 361963: 441965: 361966: 391967: 311968: 511969: 271970: 451971: 641972: 451973: 521974: 491975: 521976: 281977: 401978: 281979: 481980: 381981: 471982: 571983: 671984: 521985: 321986: 431987: 391988: 371989: 331990: 351991: 331992: 401993: 461994: 331995: 531996: 701997: 331998: 561999: 502000: 362001: 242002: 322003: 38191019161962196919751981198719931999
Days per year at Reston with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 70 in 1996.
Days with 10 mm (0.39 in) or more of precipitation per year at Reston
YearDaysDecade average
19103340.6
19113740.6
19125240.6
19133840.6
19144440.6
19153640.6
19164440.6
19563538.8
19574738.8
19584238.8
19593138.8
19603537.4
19623637.4
19634437.4
19653637.4
19663937.4
19673137.4
19685137.4
19692737.4
19704545.1
19716445.1
19724545.1
19735245.1
19744945.1
19755245.1
19762845.1
19774045.1
19782845.1
19794845.1
19803844.5
19814744.5
19825744.5
19836744.5
19845244.5
19853244.5
19864344.5
19873944.5
19883744.5
19893344.5
19903544.9
19913344.9
19924044.9
19934644.9
19943344.9
19955344.9
19967044.9
19973344.9
19985644.9
19995044.9
20003632.5
20012432.5
20023232.5
20033832.5
First to last qualifying date each year at Reston For each year, a bar from the first to the last day at Reston meeting 10 mm (0.39 in). 1910: 7 January 1910 to 31 December 19101911: 9 January 1911 to 31 December 19111912: 6 January 1912 to 31 December 19121913: 3 January 1913 to 31 December 19131914: 2 January 1914 to 26 December 19141915: 6 January 1915 to 28 December 19151916: 7 January 1916 to 23 December 19161956: 2 January 1956 to 11 December 19561957: 7 January 1957 to 28 December 19571958: 1 January 1958 to 27 December 19581959: 4 January 1959 to 31 December 19591960: 6 January 1960 to 31 December 19601962: 3 January 1962 to 15 December 19621963: 30 January 1963 to 28 December 19631965: 2 January 1965 to 31 December 19651966: 1 January 1966 to 12 December 19661967: 4 January 1967 to 17 December 19671968: 7 January 1968 to 27 December 19681969: 7 January 1969 to 27 December 19691970: 9 January 1970 to 31 December 19701971: 10 January 1971 to 24 December 19711972: 11 January 1972 to 27 December 19721973: 10 January 1973 to 28 December 19731974: 11 January 1974 to 30 December 19741975: 3 January 1975 to 30 December 19751976: 4 January 1976 to 9 December 19761977: 12 January 1977 to 30 December 19771978: 5 January 1978 to 11 December 19781979: 10 January 1979 to 31 December 19791980: 5 January 1980 to 25 December 19801981: 28 January 1981 to 30 December 19811982: 1 January 1982 to 22 December 19821983: 2 January 1983 to 29 December 19831984: 20 January 1984 to 29 December 19841985: 1 February 1985 to 31 December 19851986: 2 January 1986 to 31 December 19861987: 1 January 1987 to 30 December 19871988: 8 January 1988 to 30 December 19881989: 8 January 1989 to 31 December 19891990: 5 January 1990 to 27 December 19901991: 9 January 1991 to 18 December 19911992: 3 January 1992 to 30 December 19921993: 3 January 1993 to 31 December 19931994: 4 January 1994 to 17 December 19941995: 5 January 1995 to 29 December 19951996: 7 January 1996 to 31 December 19961997: 1 January 1997 to 16 December 19971998: 1 January 1998 to 30 December 19981999: 14 January 1999 to 12 December 19992000: 1 January 2000 to 21 December 20002001: 9 January 2001 to 30 December 20012002: 5 January 2002 to 30 December 20022003: 2 January 2003 to 31 December 200319101956196519721979198619932000JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Reston meeting 10 mm (0.39 in).
First to last qualifying date each year at Reston
YearFirst dateLast date
19101910-01-071910-12-31
19111911-01-091911-12-31
19121912-01-061912-12-31
19131913-01-031913-12-31
19141914-01-021914-12-26
19151915-01-061915-12-28
19161916-01-071916-12-23
19561956-01-021956-12-11
19571957-01-071957-12-28
19581958-01-011958-12-27
19591959-01-041959-12-31
19601960-01-061960-12-31
19621962-01-031962-12-15
19631963-01-301963-12-28
19651965-01-021965-12-31
19661966-01-011966-12-12
19671967-01-041967-12-17
19681968-01-071968-12-27
19691969-01-071969-12-27
19701970-01-091970-12-31
19711971-01-101971-12-24
19721972-01-111972-12-27
19731973-01-101973-12-28
19741974-01-111974-12-30
19751975-01-031975-12-30
19761976-01-041976-12-09
19771977-01-121977-12-30
19781978-01-051978-12-11
19791979-01-101979-12-31
19801980-01-051980-12-25
19811981-01-281981-12-30
19821982-01-011982-12-22
19831983-01-021983-12-29
19841984-01-201984-12-29
19851985-02-011985-12-31
19861986-01-021986-12-31
19871987-01-011987-12-30
19881988-01-081988-12-30
19891989-01-081989-12-31
19901990-01-051990-12-27
19911991-01-091991-12-18
19921992-01-031992-12-30
19931993-01-031993-12-31
19941994-01-041994-12-17
19951995-01-051995-12-29
19961996-01-071996-12-31
19971997-01-011997-12-16
19981998-01-011998-12-30
19991999-01-141999-12-12
20002000-01-012000-12-21
20012001-01-092001-12-30
20022002-01-052002-12-30
20032003-01-022003-12-31

Every Fixed Threshold

Fixed thresholds at Reston
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain5370199638
25 mm (0.98 in): Days with 25 mm or more rain532119719
50 mm (1.97 in): Days with 50 mm or more rain47519712
100 mm (3.94 in): Days with 100 mm or more rain3119811
10 cm (3.9 in): Days with 10 cm or more snowfall5319651
25 cm (9.8 in): Days with 25 cm or more snowfall2119621

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1910.

Download the Data

  • Data for Reston 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).