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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Norpa Threshold Days by Year

3 fixed thresholds counted per year at Norpa (ASN00010110): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Norpa Thresholds

  • Norpa: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 1929 with 15.
  • Norpa: days with 25 mm (0.98 in) or more of precipitation in 14 years, most in 1927 with 4.
  • Norpa: days with 50 mm (1.97 in) or more of precipitation in 1 years, most in 1951 with 2.
  • 3 fixed thresholds have at least one qualifying day at Norpa.
21 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Norpa Days per year at Norpa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 15 in 1929. 0510151925: 91926: 131927: 101928: 81929: 151930: 131931: 91932: 111933: 61934: 151935: 61943: 151944: 81945: 111947: 71948: 61949: 61950: 71951: 71952: 51954: 91925192819311934194419481951
Days per year at Norpa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 15 in 1929.
Days with 10 mm (0.39 in) or more of precipitation per year at Norpa
YearDaysDecade average
1925911
19261311
19271011
1928811
19291511
19301310
1931910
19321110
1933610
19341510
1935610
1943158.8
194488.8
1945118.8
194778.8
194868.8
194968.8
195077
195177
195257
195497
First to last qualifying date each year at Norpa For each year, a bar from the first to the last day at Norpa meeting 10 mm (0.39 in). 1925: 15 January 1925 to 9 December 19251926: 10 March 1926 to 27 September 19261927: 13 March 1927 to 19 September 19271928: 28 March 1928 to 3 September 19281929: 15 February 1929 to 15 November 19291930: 8 March 1930 to 18 August 19301931: 7 April 1931 to 2 September 19311932: 29 May 1932 to 23 October 19321933: 11 May 1933 to 15 November 19331934: 3 January 1934 to 13 November 19341935: 26 May 1935 to 19 October 19351943: 31 January 1943 to 23 August 19431944: 18 May 1944 to 28 August 19441945: 26 March 1945 to 23 August 19451947: 5 March 1947 to 25 October 19471948: 22 March 1948 to 28 September 19481949: 23 June 1949 to 1 September 19491950: 8 May 1950 to 10 October 19501951: 14 February 1951 to 1 December 19511952: 21 January 1952 to 17 December 19521954: 23 May 1954 to 20 August 19541925192819311934194419481951JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Norpa meeting 10 mm (0.39 in).
First to last qualifying date each year at Norpa
YearFirst dateLast date
19251925-01-151925-12-09
19261926-03-101926-09-27
19271927-03-131927-09-19
19281928-03-281928-09-03
19291929-02-151929-11-15
19301930-03-081930-08-18
19311931-04-071931-09-02
19321932-05-291932-10-23
19331933-05-111933-11-15
19341934-01-031934-11-13
19351935-05-261935-10-19
19431943-01-311943-08-23
19441944-05-181944-08-28
19451945-03-261945-08-23
19471947-03-051947-10-25
19481948-03-221948-09-28
19491949-06-231949-09-01
19501950-05-081950-10-10
19511951-02-141951-12-01
19521952-01-211952-12-17
19541954-05-231954-08-20

Every Fixed Threshold

Fixed thresholds at Norpa
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain211519299
25 mm (0.98 in): Days with 25 mm or more rain14419271
50 mm (1.97 in): Days with 50 mm or more rain1219512

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1925.

Download the Data

  • Data for Norpa 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).