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Built 2026-10-19 (19 October 2026)

Mount Derriwong Threshold Days by Year (ASN00050025)

4 fixed thresholds counted per year at Mount Derriwong (ASN00050025): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mount Derriwong Thresholds

  • Mount Derriwong: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 1950 with 40.
  • Mount Derriwong: days with 25 mm (0.98 in) or more of precipitation in 41 years, most in 1950 with 16.
  • Mount Derriwong: days with 50 mm (1.97 in) or more of precipitation in 14 years, most in 1905 with 3.
  • Mount Derriwong: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1941 with 1.
  • 4 fixed thresholds have at least one qualifying day at Mount Derriwong.
43 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Mount Derriwong Days per year at Mount Derriwong with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1950. 0102030401892: 171893: 201894: 221895: 121896: 161897: 101898: 111899: 101900: 181901: 81902: 61903: 161904: 121905: 161906: 181907: 141908: 121910: 151911: 171912: 111913: 201914: 71915: 81916: 251917: 191918: 91927: 141936: 241937: 81938: 131939: 221940: 121941: 91942: 211943: 111944: 41945: 131946: 41947: 191948: 151949: 171950: 401951: 10189218971902190719131918193919441949
Days per year at Mount Derriwong 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 Mount Derriwong
YearDaysDecade average
18921714.8
18932014.8
18942214.8
18951214.8
18961614.8
18971014.8
18981114.8
18991014.8
19001813.3
1901813.3
1902613.3
19031613.3
19041213.3
19051613.3
19061813.3
19071413.3
19081213.3
19101514.6
19111714.6
19121114.6
19132014.6
1914714.6
1915814.6
19162514.6
19171914.6
1918914.6
19271414
19362416.8
1937816.8
19381316.8
19392216.8
19401212.5
1941912.5
19422112.5
19431112.5
1944412.5
19451312.5
1946412.5
19471912.5
19481512.5
19491712.5
19504025
19511025
First to last qualifying date each year at Mount Derriwong For each year, a bar from the first to the last day at Mount Derriwong meeting 10 mm (0.39 in). 1892: 12 January 1892 to 31 December 18921893: 5 March 1893 to 29 December 18931894: 4 January 1894 to 28 December 18941895: 5 January 1895 to 10 December 18951896: 10 February 1896 to 3 December 18961897: 9 January 1897 to 22 September 18971898: 13 January 1898 to 22 October 18981899: 19 January 1899 to 5 November 18991900: 8 January 1900 to 28 October 19001901: 12 January 1901 to 28 October 19011902: 27 March 1902 to 19 December 19021903: 27 January 1903 to 21 December 19031904: 2 January 1904 to 18 December 19041905: 28 March 1905 to 31 December 19051906: 20 February 1906 to 18 December 19061907: 27 January 1907 to 28 December 19071908: 10 January 1908 to 27 November 19081910: 11 January 1910 to 1 December 19101911: 13 January 1911 to 5 December 19111912: 7 January 1912 to 25 December 19121913: 3 January 1913 to 25 December 19131914: 12 January 1914 to 31 December 19141915: 20 February 1915 to 15 December 19151916: 30 January 1916 to 10 December 19161917: 11 January 1917 to 13 December 19171918: 14 February 1918 to 16 September 19181927: 6 January 1927 to 9 December 19271936: 5 January 1936 to 22 December 19361937: 1 January 1937 to 7 September 19371938: 27 January 1938 to 28 December 19381939: 1 January 1939 to 13 December 19391940: 4 April 1940 to 20 December 19401941: 2 January 1941 to 20 December 19411942: 2 February 1942 to 30 December 19421943: 22 January 1943 to 19 November 19431944: 16 May 1944 to 21 August 19441945: 14 January 1945 to 18 December 19451946: 18 January 1946 to 16 March 19461947: 10 February 1947 to 25 December 19471948: 1 January 1948 to 30 December 19481949: 24 February 1949 to 21 November 19491950: 11 January 1950 to 23 December 19501951: 19 January 1951 to 25 September 195118921898190419111917193919451951JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mount Derriwong meeting 10 mm (0.39 in).
First to last qualifying date each year at Mount Derriwong
YearFirst dateLast date
18921892-01-121892-12-31
18931893-03-051893-12-29
18941894-01-041894-12-28
18951895-01-051895-12-10
18961896-02-101896-12-03
18971897-01-091897-09-22
18981898-01-131898-10-22
18991899-01-191899-11-05
19001900-01-081900-10-28
19011901-01-121901-10-28
19021902-03-271902-12-19
19031903-01-271903-12-21
19041904-01-021904-12-18
19051905-03-281905-12-31
19061906-02-201906-12-18
19071907-01-271907-12-28
19081908-01-101908-11-27
19101910-01-111910-12-01
19111911-01-131911-12-05
19121912-01-071912-12-25
19131913-01-031913-12-25
19141914-01-121914-12-31
19151915-02-201915-12-15
19161916-01-301916-12-10
19171917-01-111917-12-13
19181918-02-141918-09-16
19271927-01-061927-12-09
19361936-01-051936-12-22
19371937-01-011937-09-07
19381938-01-271938-12-28
19391939-01-011939-12-13
19401940-04-041940-12-20
19411941-01-021941-12-20
19421942-02-021942-12-30
19431943-01-221943-11-19
19441944-05-161944-08-21
19451945-01-141945-12-18
19461946-01-181946-03-16
19471947-02-101947-12-25
19481948-01-011948-12-30
19491949-02-241949-11-21
19501950-01-111950-12-23
19511951-01-191951-09-25

Every Fixed Threshold

Fixed thresholds at Mount Derriwong
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4340195010
25 mm (0.98 in): Days with 25 mm or more rain4116195016
50 mm (1.97 in): Days with 50 mm or more rain14319052
100 mm (3.94 in): Days with 100 mm or more rain1119411

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1892.

Download the Data

  • Data for Mount Derriwong 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).