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Built 2026-10-19 (19 October 2026)

Aurora Threshold Days by Year (USC00290646)

6 fixed thresholds counted per year at Aurora (USC00290646): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Aurora Thresholds

  • Aurora: days with 10 mm (0.39 in) or more of precipitation in 48 years, most in 1941 with 26.
  • Aurora: days with 25 mm (0.98 in) or more of precipitation in 45 years, most in 1942 with 7.
  • Aurora: days with 10 cm (3.9 in) or more of snowfall in 41 years, most in 1916 with 12.
  • Aurora: days with 25 cm (9.8 in) or more of snowfall in 21 years, most in 1928 with 4.
  • 6 fixed thresholds have at least one qualifying day at Aurora.
48 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Aurora Days per year at Aurora with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 1941. 01020301910: 71911: 161912: 131913: 181914: 241915: 211916: 151917: 81918: 171919: 251920: 141921: 211922: 101923: 131924: 131925: 141926: 161927: 181928: 181929: 221930: 221931: 171932: 101933: 161934: 121935: 151936: 101937: 201938: 201939: 181940: 211941: 261942: 181943: 181944: 191945: 81946: 161947: 151948: 151949: 211951: 131952: 131953: 151954: 61955: 121956: 71957: 191959: 101910191519201925193019351940194519511956
Days per year at Aurora with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 1941.
Days with 10 mm (0.39 in) or more of precipitation per year at Aurora
YearDaysDecade average
1910716.4
19111616.4
19121316.4
19131816.4
19142416.4
19152116.4
19161516.4
1917816.4
19181716.4
19192516.4
19201415.9
19212115.9
19221015.9
19231315.9
19241315.9
19251415.9
19261615.9
19271815.9
19281815.9
19292215.9
19302216
19311716
19321016
19331616
19341216
19351516
19361016
19372016
19382016
19391816
19402117.7
19412617.7
19421817.7
19431817.7
19441917.7
1945817.7
19461617.7
19471517.7
19481517.7
19492117.7
19511311.9
19521311.9
19531511.9
1954611.9
19551211.9
1956711.9
19571911.9
19591011.9
First to last qualifying date each year at Aurora For each year, a bar from the first to the last day at Aurora meeting 10 mm (0.39 in). 1910: 9 April 1910 to 17 October 19101911: 29 May 1911 to 27 October 19111912: 2 March 1912 to 11 September 19121913: 20 February 1913 to 4 December 19131914: 7 April 1914 to 23 October 19141915: 20 February 1915 to 4 October 19151916: 19 January 1916 to 20 August 19161917: 5 May 1917 to 16 November 19171918: 27 January 1918 to 17 December 19181919: 1 February 1919 to 7 October 19191920: 13 May 1920 to 31 October 19201921: 20 March 1921 to 19 September 19211922: 27 February 1922 to 4 November 19221923: 12 April 1923 to 11 December 19231924: 12 March 1924 to 23 December 19241925: 10 May 1925 to 6 November 19251926: 20 March 1926 to 30 October 19261927: 15 February 1927 to 17 September 19271928: 9 February 1928 to 18 November 19281929: 27 March 1929 to 8 November 19291930: 7 March 1930 to 19 November 19301931: 6 March 1931 to 20 October 19311932: 23 April 1932 to 24 September 19321933: 4 May 1933 to 1 December 19331934: 5 January 1934 to 21 November 19341935: 7 January 1935 to 27 August 19351936: 7 May 1936 to 27 September 19361937: 7 February 1937 to 30 September 19371938: 6 May 1938 to 5 November 19381939: 8 January 1939 to 8 October 19391940: 13 January 1940 to 25 November 19401941: 29 January 1941 to 14 October 19411942: 12 April 1942 to 5 December 19421943: 18 January 1943 to 27 December 19431944: 26 January 1944 to 4 December 19441945: 25 July 1945 to 29 September 19451946: 17 February 1946 to 3 November 19461947: 28 February 1947 to 31 December 19471948: 22 January 1948 to 31 October 19481949: 28 February 1949 to 30 September 19491951: 28 March 1951 to 4 December 19511952: 20 April 1952 to 22 September 19521953: 15 May 1953 to 3 December 19531954: 23 March 1954 to 7 October 19541955: 21 March 1955 to 7 November 19551956: 28 January 1956 to 24 August 19561957: 8 March 1957 to 16 November 19571959: 23 May 1959 to 30 October 195919101916192219281934194019461953JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Aurora meeting 10 mm (0.39 in).
First to last qualifying date each year at Aurora
YearFirst dateLast date
19101910-04-091910-10-17
19111911-05-291911-10-27
19121912-03-021912-09-11
19131913-02-201913-12-04
19141914-04-071914-10-23
19151915-02-201915-10-04
19161916-01-191916-08-20
19171917-05-051917-11-16
19181918-01-271918-12-17
19191919-02-011919-10-07
19201920-05-131920-10-31
19211921-03-201921-09-19
19221922-02-271922-11-04
19231923-04-121923-12-11
19241924-03-121924-12-23
19251925-05-101925-11-06
19261926-03-201926-10-30
19271927-02-151927-09-17
19281928-02-091928-11-18
19291929-03-271929-11-08
19301930-03-071930-11-19
19311931-03-061931-10-20
19321932-04-231932-09-24
19331933-05-041933-12-01
19341934-01-051934-11-21
19351935-01-071935-08-27
19361936-05-071936-09-27
19371937-02-071937-09-30
19381938-05-061938-11-05
19391939-01-081939-10-08
19401940-01-131940-11-25
19411941-01-291941-10-14
19421942-04-121942-12-05
19431943-01-181943-12-27
19441944-01-261944-12-04
19451945-07-251945-09-29
19461946-02-171946-11-03
19471947-02-281947-12-31
19481948-01-221948-10-31
19491949-02-281949-09-30
19511951-03-281951-12-04
19521952-04-201952-09-22
19531953-05-151953-12-03
19541954-03-231954-10-07
19551955-03-211955-11-07
19561956-01-281956-08-24
19571957-03-081957-11-16
19591959-05-231959-10-30

Every Fixed Threshold

Fixed thresholds at Aurora
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4826194110
25 mm (0.98 in): Days with 25 mm or more rain45719423
50 mm (1.97 in): Days with 50 mm or more rain13219421
10 cm (3.9 in): Days with 10 cm or more snowfall411219162
25 cm (9.8 in): Days with 25 cm or more snowfall21419281
50 cm (19.7 in): Days with 50 cm or more snowfall5119181

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 Aurora 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).