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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Hartley Threshold Days by Year

4 fixed thresholds counted per year at Hartley (ASN00054018): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hartley Thresholds

  • Hartley: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1950 with 40.
  • Hartley: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1942 with 13.
  • Hartley: days with 50 mm (1.97 in) or more of precipitation in 22 years, most in 1942 with 3.
  • Hartley: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1930 with 1.
  • 4 fixed thresholds have at least one qualifying day at Hartley.
30 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Hartley Days per year at Hartley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1950. 0102030401923: 141924: 351925: 231926: 211927: 221930: 271931: 321932: 221933: 341934: 311935: 171936: 201937: 221938: 191939: 211940: 131941: 231942: 241943: 201944: 121945: 221946: 161947: 381948: 261949: 281950: 401951: 221952: 231953: 201954: 231923192619311934193719401943194619491952
Days per year at Hartley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1950.
Days with 10 mm (0.39 in) or more of precipitation per year at Hartley
YearDaysDecade average
19231423
19243523
19252323
19262123
19272223
19302724.5
19313224.5
19322224.5
19333424.5
19343124.5
19351724.5
19362024.5
19372224.5
19381924.5
19392124.5
19401322.2
19412322.2
19422422.2
19432022.2
19441222.2
19452222.2
19461622.2
19473822.2
19482622.2
19492822.2
19504025.6
19512225.6
19522325.6
19532025.6
19542325.6
First to last qualifying date each year at Hartley For each year, a bar from the first to the last day at Hartley meeting 10 mm (0.39 in). 1923: 7 January 1923 to 26 December 19231924: 5 January 1924 to 17 December 19241925: 2 January 1925 to 31 December 19251926: 2 February 1926 to 29 December 19261927: 5 January 1927 to 21 December 19271930: 25 January 1930 to 18 December 19301931: 2 February 1931 to 11 December 19311932: 4 January 1932 to 21 December 19321933: 15 January 1933 to 22 December 19331934: 4 January 1934 to 30 December 19341935: 6 January 1935 to 25 December 19351936: 10 January 1936 to 26 December 19361937: 11 January 1937 to 29 December 19371938: 21 January 1938 to 28 November 19381939: 1 January 1939 to 28 December 19391940: 7 January 1940 to 21 December 19401941: 5 January 1941 to 16 November 19411942: 27 January 1942 to 31 December 19421943: 1 January 1943 to 20 December 19431944: 12 January 1944 to 21 December 19441945: 9 January 1945 to 19 December 19451946: 19 January 1946 to 13 December 19461947: 14 January 1947 to 25 December 19471948: 2 January 1948 to 31 December 19481949: 8 January 1949 to 20 December 19491950: 16 January 1950 to 24 December 19501951: 1 January 1951 to 20 December 19511952: 19 February 1952 to 30 October 19521953: 14 January 1953 to 23 November 19531954: 2 January 1954 to 21 November 195419231927193319371941194519491953JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hartley meeting 10 mm (0.39 in).
First to last qualifying date each year at Hartley
YearFirst dateLast date
19231923-01-071923-12-26
19241924-01-051924-12-17
19251925-01-021925-12-31
19261926-02-021926-12-29
19271927-01-051927-12-21
19301930-01-251930-12-18
19311931-02-021931-12-11
19321932-01-041932-12-21
19331933-01-151933-12-22
19341934-01-041934-12-30
19351935-01-061935-12-25
19361936-01-101936-12-26
19371937-01-111937-12-29
19381938-01-211938-11-28
19391939-01-011939-12-28
19401940-01-071940-12-21
19411941-01-051941-11-16
19421942-01-271942-12-31
19431943-01-011943-12-20
19441944-01-121944-12-21
19451945-01-091945-12-19
19461946-01-191946-12-13
19471947-01-141947-12-25
19481948-01-021948-12-31
19491949-01-081949-12-20
19501950-01-161950-12-24
19511951-01-011951-12-20
19521952-02-191952-10-30
19531953-01-141953-11-23
19541954-01-021954-11-21

Every Fixed Threshold

Fixed thresholds at Hartley
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3040195023
25 mm (0.98 in): Days with 25 mm or more rain301319429
50 mm (1.97 in): Days with 50 mm or more rain22319422
100 mm (3.94 in): Days with 100 mm or more rain1119301

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 Hartley 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).