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Built 2026-10-19 (19 October 2026)

Mt Vernon Threshold Days by Year (USC00096126)

4 fixed thresholds counted per year at Mt Vernon (USC00096126): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mt Vernon Thresholds

  • Mt Vernon: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1947 with 57.
  • Mt Vernon: days with 25 mm (0.98 in) or more of precipitation in 52 years, most in 1893 with 25.
  • Mt Vernon: days with 50 mm (1.97 in) or more of precipitation in 50 years, most in 2021 with 11.
  • Mt Vernon: days with 100 mm (3.94 in) or more of precipitation in 12 years, most in 1998 with 2.
  • 4 fixed thresholds have at least one qualifying day at Mt Vernon.
52 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Mt Vernon Days per year at Mt Vernon with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 57 in 1947. 02040601893: 441940: 351941: 291942: 381943: 301944: 451945: 391946: 331947: 571948: 481949: 431950: 371951: 341952: 331953: 481954: 191955: 281956: 391957: 421958: 341959: 461960: 321961: 381962: 251963: 311964: 481965: 351967: 321968: 311969: 291970: 381971: 371982: 441987: 261988: 311990: 351991: 341992: 331993: 351994: 401995: 351996: 351997: 451998: 291999: 292001: 222009: 342010: 382011: 342016: 212021: 432022: 35189319451951195719631970199119972011
Days per year at Mt Vernon with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 57 in 1947.
Days with 10 mm (0.39 in) or more of precipitation per year at Mt Vernon
YearDaysDecade average
18934444
19403539.7
19412939.7
19423839.7
19433039.7
19444539.7
19453939.7
19463339.7
19475739.7
19484839.7
19494339.7
19503736
19513436
19523336
19534836
19541936
19552836
19563936
19574236
19583436
19594636
19603233.4
19613833.4
19622533.4
19633133.4
19644833.4
19653533.4
19673233.4
19683133.4
19692933.4
19703837.5
19713737.5
19824433.7
19872633.7
19883133.7
19903535
19913435
19923335
19933535
19944035
19953535
19963535
19974535
19982935
19992935
20012228
20093428
20103831
20113431
20162131
20214339
20223539
First to last qualifying date each year at Mt Vernon For each year, a bar from the first to the last day at Mt Vernon meeting 10 mm (0.39 in). 1893: 1 January 1893 to 28 November 18931940: 12 January 1940 to 17 December 19401941: 4 January 1941 to 26 December 19411942: 2 January 1942 to 30 December 19421943: 9 January 1943 to 29 December 19431944: 8 January 1944 to 12 December 19441945: 7 January 1945 to 31 December 19451946: 16 January 1946 to 18 November 19461947: 6 January 1947 to 22 December 19471948: 2 January 1948 to 30 December 19481949: 6 January 1949 to 16 December 19491950: 12 January 1950 to 30 December 19501951: 2 February 1951 to 27 December 19511952: 23 January 1952 to 26 December 19521953: 24 January 1953 to 31 December 19531954: 21 February 1954 to 13 December 19541955: 17 January 1955 to 29 October 19551956: 24 January 1956 to 24 December 19561957: 3 February 1957 to 29 December 19571958: 7 January 1958 to 28 December 19581959: 3 January 1959 to 19 December 19591960: 3 January 1960 to 16 December 19601961: 1 January 1961 to 18 December 19611962: 1 January 1962 to 29 December 19621963: 7 January 1963 to 14 December 19631964: 1 January 1964 to 27 December 19641965: 24 January 1965 to 19 December 19651967: 1 January 1967 to 28 December 19671968: 2 January 1968 to 31 December 19681969: 20 January 1969 to 22 December 19691970: 1 January 1970 to 29 December 19701971: 5 January 1971 to 21 December 19711982: 3 January 1982 to 31 December 19821987: 4 January 1987 to 24 November 19871988: 3 January 1988 to 31 December 19881990: 1 January 1990 to 20 December 19901991: 2 January 1991 to 4 December 19911992: 3 January 1992 to 10 December 19921993: 7 January 1993 to 23 December 19931994: 4 January 1994 to 22 December 19941995: 7 January 1995 to 19 December 19951996: 7 January 1996 to 19 December 19961997: 8 January 1997 to 27 December 19971998: 8 January 1998 to 26 December 19981999: 3 January 1999 to 22 December 19992001: 20 January 2001 to 25 November 20012009: 19 February 2009 to 18 December 20092010: 17 January 2010 to 17 December 20102011: 1 January 2011 to 27 December 20112016: 1 January 2016 to 8 October 20162021: 4 January 2021 to 22 December 20212022: 3 January 2022 to 21 December 202218931946195319601968199019972016JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mt Vernon meeting 10 mm (0.39 in).
First to last qualifying date each year at Mt Vernon
YearFirst dateLast date
18931893-01-011893-11-28
19401940-01-121940-12-17
19411941-01-041941-12-26
19421942-01-021942-12-30
19431943-01-091943-12-29
19441944-01-081944-12-12
19451945-01-071945-12-31
19461946-01-161946-11-18
19471947-01-061947-12-22
19481948-01-021948-12-30
19491949-01-061949-12-16
19501950-01-121950-12-30
19511951-02-021951-12-27
19521952-01-231952-12-26
19531953-01-241953-12-31
19541954-02-211954-12-13
19551955-01-171955-10-29
19561956-01-241956-12-24
19571957-02-031957-12-29
19581958-01-071958-12-28
19591959-01-031959-12-19
19601960-01-031960-12-16
19611961-01-011961-12-18
19621962-01-011962-12-29
19631963-01-071963-12-14
19641964-01-011964-12-27
19651965-01-241965-12-19
19671967-01-011967-12-28
19681968-01-021968-12-31
19691969-01-201969-12-22
19701970-01-011970-12-29
19711971-01-051971-12-21
19821982-01-031982-12-31
19871987-01-041987-11-24
19881988-01-031988-12-31
19901990-01-011990-12-20
19911991-01-021991-12-04
19921992-01-031992-12-10
19931993-01-071993-12-23
19941994-01-041994-12-22
19951995-01-071995-12-19
19961996-01-071996-12-19
19971997-01-081997-12-27
19981998-01-081998-12-26
19991999-01-031999-12-22
20012001-01-202001-11-25
20092009-02-192009-12-18
20102010-01-172010-12-17
20112011-01-012011-12-27
20162016-01-012016-10-08
20212021-01-042021-12-22
20222022-01-032022-12-21

Every Fixed Threshold

Fixed thresholds at Mt Vernon
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain5257194735
25 mm (0.98 in): Days with 25 mm or more rain5225189317
50 mm (1.97 in): Days with 50 mm or more rain501120215
100 mm (3.94 in): Days with 100 mm or more rain12219981

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

  • Data for Mt Vernon 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).