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

Shady Grove Threshold Days by Year (ASN00008117)

4 fixed thresholds counted per year at Shady Grove (ASN00008117): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Shady Grove Thresholds

  • Shady Grove: days with 10 mm (0.39 in) or more of precipitation in 34 years, most in 1963 with 31.
  • Shady Grove: days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 1945 with 9.
  • Shady Grove: days with 50 mm (1.97 in) or more of precipitation in 10 years, most in 1963 with 2.
  • Shady Grove: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1934 with 1.
  • 4 fixed thresholds have at least one qualifying day at Shady Grove.
34 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Shady Grove Days per year at Shady Grove with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 31 in 1963. 0102030401923: 161924: 141925: 181926: 201927: 191928: 191929: 181930: 181931: 191932: 221933: 161934: 181935: 171936: 121937: 91938: 191939: 231940: 81941: 171942: 171943: 141944: 131945: 271946: 201949: 161962: 191963: 311964: 231965: 191966: 141967: 161968: 231969: 71970: 12192319271931193519391943194919651969
Days per year at Shady Grove with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 31 in 1963.
Days with 10 mm (0.39 in) or more of precipitation per year at Shady Grove
YearDaysDecade average
19231617.7
19241417.7
19251817.7
19262017.7
19271917.7
19281917.7
19291817.7
19301817.3
19311917.3
19322217.3
19331617.3
19341817.3
19351717.3
19361217.3
1937917.3
19381917.3
19392317.3
1940816.5
19411716.5
19421716.5
19431416.5
19441316.5
19452716.5
19462016.5
19491616.5
19621919
19633119
19642319
19651919
19661419
19671619
19682319
1969719
19701212
First to last qualifying date each year at Shady Grove For each year, a bar from the first to the last day at Shady Grove meeting 10 mm (0.39 in). 1923: 13 February 1923 to 4 September 19231924: 12 May 1924 to 17 October 19241925: 23 January 1925 to 25 December 19251926: 16 April 1926 to 19 November 19261927: 12 March 1927 to 19 September 19271928: 19 April 1928 to 31 December 19281929: 3 May 1929 to 15 November 19291930: 9 May 1930 to 17 October 19301931: 23 April 1931 to 6 October 19311932: 28 March 1932 to 29 October 19321933: 24 May 1933 to 3 October 19331934: 8 March 1934 to 24 September 19341935: 6 January 1935 to 2 September 19351936: 20 April 1936 to 20 November 19361937: 19 April 1937 to 7 September 19371938: 14 March 1938 to 2 November 19381939: 20 January 1939 to 11 November 19391940: 23 January 1940 to 11 October 19401941: 4 April 1941 to 3 October 19411942: 15 April 1942 to 7 September 19421943: 3 March 1943 to 8 December 19431944: 7 March 1944 to 27 August 19441945: 15 May 1945 to 11 November 19451946: 23 May 1946 to 13 November 19461949: 17 April 1949 to 26 September 19491962: 28 February 1962 to 8 November 19621963: 27 January 1963 to 11 December 19631964: 25 March 1964 to 9 October 19641965: 1 May 1965 to 5 October 19651966: 4 April 1966 to 9 October 19661967: 9 May 1967 to 3 October 19671968: 27 January 1968 to 11 September 19681969: 18 May 1969 to 3 November 19691970: 17 April 1970 to 26 August 19701923192819331938194319621967JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Shady Grove meeting 10 mm (0.39 in).
First to last qualifying date each year at Shady Grove
YearFirst dateLast date
19231923-02-131923-09-04
19241924-05-121924-10-17
19251925-01-231925-12-25
19261926-04-161926-11-19
19271927-03-121927-09-19
19281928-04-191928-12-31
19291929-05-031929-11-15
19301930-05-091930-10-17
19311931-04-231931-10-06
19321932-03-281932-10-29
19331933-05-241933-10-03
19341934-03-081934-09-24
19351935-01-061935-09-02
19361936-04-201936-11-20
19371937-04-191937-09-07
19381938-03-141938-11-02
19391939-01-201939-11-11
19401940-01-231940-10-11
19411941-04-041941-10-03
19421942-04-151942-09-07
19431943-03-031943-12-08
19441944-03-071944-08-27
19451945-05-151945-11-11
19461946-05-231946-11-13
19491949-04-171949-09-26
19621962-02-281962-11-08
19631963-01-271963-12-11
19641964-03-251964-10-09
19651965-05-011965-10-05
19661966-04-041966-10-09
19671967-05-091967-10-03
19681968-01-271968-09-11
19691969-05-181969-11-03
19701970-04-171970-08-26

Every Fixed Threshold

Fixed thresholds at Shady Grove
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3431196312
25 mm (0.98 in): Days with 25 mm or more rain32919452
50 mm (1.97 in): Days with 50 mm or more rain10219631
100 mm (3.94 in): Days with 100 mm or more rain1119341

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1923.

Download the Data

  • Data for Shady Grove 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).