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Built 2026-10-18 (18 October 2026)

Day Dawn Threshold Days by Year

4 fixed thresholds counted per year at Day Dawn (ASN00007022): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Day Dawn Thresholds

  • Day Dawn: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1942 with 14.
  • Day Dawn: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1909 with 5.
  • Day Dawn: days with 50 mm (1.97 in) or more of precipitation in 10 years, most in 1929 with 2.
  • Day Dawn: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1942 with 1.
  • 4 fixed thresholds have at least one qualifying day at Day Dawn.
35 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Day Dawn Days per year at Day Dawn with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 14 in 1942. 0510151907: 31908: 101909: 91910: 31911: 21913: 81914: 51915: 131916: 41917: 81919: 71920: 11921: 91922: 71923: 71925: 101926: 51927: 81928: 51929: 71938: 31939: 11940: 21941: 61942: 141943: 61944: 11945: 41946: 11947: 91948: 81949: 51950: 41951: 71952: 4190719111916192119261938194219461950
Days per year at Day Dawn with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 14 in 1942.
Days with 10 mm (0.39 in) or more of precipitation per year at Day Dawn
YearDaysDecade average
190737.3
1908107.3
190997.3
191036.3
191126.3
191386.3
191456.3
1915136.3
191646.3
191786.3
191976.3
192016.6
192196.6
192276.6
192376.6
1925106.6
192656.6
192786.6
192856.6
192976.6
193832
193912
194025.6
194165.6
1942145.6
194365.6
194415.6
194545.6
194615.6
194795.6
194885.6
194955.6
195045
195175
195245
First to last qualifying date each year at Day Dawn For each year, a bar from the first to the last day at Day Dawn meeting 10 mm (0.39 in). 1907: 10 June 1907 to 31 July 19071908: 18 February 1908 to 10 December 19081909: 6 January 1909 to 18 October 19091910: 10 January 1910 to 6 June 19101911: 22 December 1911 to 27 December 19111913: 4 January 1913 to 19 August 19131914: 16 July 1914 to 7 December 19141915: 5 January 1915 to 15 December 19151916: 20 January 1916 to 5 October 19161917: 25 January 1917 to 8 December 19171919: 10 January 1919 to 10 December 19191920: 5 August 1920 to 5 August 19201921: 24 January 1921 to 27 October 19211922: 1 March 1922 to 25 August 19221923: 4 January 1923 to 27 July 19231925: 16 January 1925 to 26 December 19251926: 9 March 1926 to 19 November 19261927: 1 March 1927 to 13 September 19271928: 30 January 1928 to 19 July 19281929: 2 January 1929 to 12 August 19291938: 18 January 1938 to 28 December 19381939: 13 January 1939 to 13 January 19391940: 28 May 1940 to 27 July 19401941: 5 April 1941 to 17 December 19411942: 3 January 1942 to 21 December 19421943: 12 February 1943 to 8 May 19431944: 1 December 1944 to 1 December 19441945: 4 February 1945 to 19 June 19451946: 1 February 1946 to 1 February 19461947: 25 February 1947 to 25 October 19471948: 8 February 1948 to 24 November 19481949: 17 February 1949 to 4 November 19491950: 1 February 1950 to 27 May 19501951: 15 January 1951 to 13 July 19511952: 22 January 1952 to 11 May 19521907191319191925193819431948JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Day Dawn meeting 10 mm (0.39 in).
First to last qualifying date each year at Day Dawn
YearFirst dateLast date
19071907-06-101907-07-31
19081908-02-181908-12-10
19091909-01-061909-10-18
19101910-01-101910-06-06
19111911-12-221911-12-27
19131913-01-041913-08-19
19141914-07-161914-12-07
19151915-01-051915-12-15
19161916-01-201916-10-05
19171917-01-251917-12-08
19191919-01-101919-12-10
19201920-08-051920-08-05
19211921-01-241921-10-27
19221922-03-011922-08-25
19231923-01-041923-07-27
19251925-01-161925-12-26
19261926-03-091926-11-19
19271927-03-011927-09-13
19281928-01-301928-07-19
19291929-01-021929-08-12
19381938-01-181938-12-28
19391939-01-131939-01-13
19401940-05-281940-07-27
19411941-04-051941-12-17
19421942-01-031942-12-21
19431943-02-121943-05-08
19441944-12-011944-12-01
19451945-02-041945-06-19
19461946-02-011946-02-01
19471947-02-251947-10-25
19481948-02-081948-11-24
19491949-02-171949-11-04
19501950-02-011950-05-27
19511951-01-151951-07-13
19521952-01-221952-05-11

Every Fixed Threshold

Fixed thresholds at Day Dawn
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain351419424
25 mm (0.98 in): Days with 25 mm or more rain25519091
50 mm (1.97 in): Days with 50 mm or more rain10219292
100 mm (3.94 in): Days with 100 mm or more rain2119421

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

  • Data for Day Dawn 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).