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

Happy Valley Threshold Days by Year

4 fixed thresholds counted per year at Happy Valley (ASN00037066): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Happy Valley Thresholds

  • Happy Valley: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1920 with 19.
  • Happy Valley: days with 25 mm (0.98 in) or more of precipitation in 17 years, most in 1924 with 9.
  • Happy Valley: days with 50 mm (1.97 in) or more of precipitation in 10 years, most in 1924 with 7.
  • Happy Valley: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1918 with 1.
  • 4 fixed thresholds have at least one qualifying day at Happy Valley.
18 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Happy Valley Days per year at Happy Valley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 19 in 1920. 051015201912: 101913: 141914: 101915: 81916: 181917: 171918: 121919: 71920: 191921: 141922: 101923: 71924: 171925: 51926: 61927: 51928: 41929: 4191219141916191819201922192419261928
Days per year at Happy Valley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 19 in 1920.
Days with 10 mm (0.39 in) or more of precipitation per year at Happy Valley
YearDaysDecade average
19121012
19131412
19141012
1915812
19161812
19171712
19181212
1919712
1920199.1
1921149.1
1922109.1
192379.1
1924179.1
192559.1
192669.1
192759.1
192849.1
192949.1
First to last qualifying date each year at Happy Valley For each year, a bar from the first to the last day at Happy Valley meeting 10 mm (0.39 in). 1912: 14 February 1912 to 25 December 19121913: 5 January 1913 to 23 December 19131914: 14 January 1914 to 25 December 19141915: 21 January 1915 to 28 December 19151916: 26 January 1916 to 31 December 19161917: 15 January 1917 to 11 December 19171918: 6 January 1918 to 25 December 19181919: 14 January 1919 to 20 May 19191920: 18 January 1920 to 5 December 19201921: 14 January 1921 to 12 October 19211922: 30 January 1922 to 21 December 19221923: 7 January 1923 to 27 December 19231924: 6 January 1924 to 15 December 19241925: 2 January 1925 to 22 March 19251926: 2 March 1926 to 19 December 19261927: 20 January 1927 to 21 December 19271928: 13 June 1928 to 23 December 19281929: 5 January 1929 to 1 April 1929191219151918192119241927JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Happy Valley meeting 10 mm (0.39 in).
First to last qualifying date each year at Happy Valley
YearFirst dateLast date
19121912-02-141912-12-25
19131913-01-051913-12-23
19141914-01-141914-12-25
19151915-01-211915-12-28
19161916-01-261916-12-31
19171917-01-151917-12-11
19181918-01-061918-12-25
19191919-01-141919-05-20
19201920-01-181920-12-05
19211921-01-141921-10-12
19221922-01-301922-12-21
19231923-01-071923-12-27
19241924-01-061924-12-15
19251925-01-021925-03-22
19261926-03-021926-12-19
19271927-01-201927-12-21
19281928-06-131928-12-23
19291929-01-051929-04-01

Every Fixed Threshold

Fixed thresholds at Happy Valley
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain181919204
25 mm (0.98 in): Days with 25 mm or more rain17919242
50 mm (1.97 in): Days with 50 mm or more rain10719241
100 mm (3.94 in): Days with 100 mm or more rain2119181

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

  • Data for Happy Valley 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).