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Built 2026-10-19 (19 October 2026)

Penrose Threshold Days by Year (USC00056410)

5 fixed thresholds counted per year at Penrose (USC00056410): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Penrose Thresholds

  • Penrose: days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 1967 with 17.
  • Penrose: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1967 with 7.
  • Penrose: days with 10 cm (3.9 in) or more of snowfall in 24 years, most in 1959 with 6.
  • Penrose: days with 50 mm (1.97 in) or more of precipitation in 5 years, most in 1952 with 1.
  • 5 fixed thresholds have at least one qualifying day at Penrose.
44 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Penrose Days per year at Penrose with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 17 in 1967. 051015201924: 71925: 71926: 51927: 111928: 81929: 101930: 111931: 101932: 51933: 121934: 41935: 91936: 131937: 41938: 111939: 41941: 151943: 51944: 91945: 101946: 121947: 151948: 111949: 101950: 21951: 81952: 41953: 21954: 41955: 71956: 81958: 71959: 71960: 141961: 111962: 91963: 121964: 51966: 131967: 171969: 101970: 131971: 41972: 16192419291934193919461951195619621969
Days per year at Penrose with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 17 in 1967.
Days with 10 mm (0.39 in) or more of precipitation per year at Penrose
YearDaysDecade average
192478
192578
192658
1927118
192888
1929108
1930118.3
1931108.3
193258.3
1933128.3
193448.3
193598.3
1936138.3
193748.3
1938118.3
193948.3
19411510.9
1943510.9
1944910.9
19451010.9
19461210.9
19471510.9
19481110.9
19491010.9
195025.4
195185.4
195245.4
195325.4
195445.4
195575.4
195685.4
195875.4
195975.4
19601411.4
19611111.4
1962911.4
19631211.4
1964511.4
19661311.4
19671711.4
19691011.4
19701311
1971411
19721611
First to last qualifying date each year at Penrose For each year, a bar from the first to the last day at Penrose meeting 10 mm (0.39 in). 1924: 12 March 1924 to 23 December 19241925: 7 February 1925 to 14 December 19251926: 12 April 1926 to 30 October 19261927: 10 March 1927 to 29 November 19271928: 15 March 1928 to 28 November 19281929: 18 July 1929 to 12 November 19291930: 25 February 1930 to 19 November 19301931: 28 February 1931 to 23 November 19311932: 23 April 1932 to 22 August 19321933: 21 April 1933 to 2 December 19331934: 10 February 1934 to 2 August 19341935: 24 April 1935 to 27 September 19351936: 8 May 1936 to 25 October 19361937: 29 May 1937 to 16 October 19371938: 14 April 1938 to 13 September 19381939: 27 March 1939 to 28 June 19391941: 12 March 1941 to 22 December 19411943: 8 April 1943 to 18 August 19431944: 18 March 1944 to 19 July 19441945: 14 April 1945 to 23 October 19451946: 7 July 1946 to 4 November 19461947: 19 April 1947 to 12 October 19471948: 1 March 1948 to 15 August 19481949: 26 February 1949 to 30 October 19491950: 3 June 1950 to 19 June 19501951: 21 May 1951 to 5 November 19511952: 21 April 1952 to 22 August 19521953: 4 April 1953 to 15 July 19531954: 30 April 1954 to 14 August 19541955: 10 May 1955 to 23 September 19551956: 15 April 1956 to 3 August 19561958: 30 March 1958 to 31 October 19581959: 25 March 1959 to 13 October 19591960: 14 January 1960 to 10 December 19601961: 7 July 1961 to 3 September 19611962: 9 January 1962 to 19 October 19621963: 4 March 1963 to 20 September 19631964: 27 May 1964 to 18 November 19641966: 20 April 1966 to 27 September 19661967: 14 April 1967 to 28 December 19671969: 16 April 1969 to 21 October 19691970: 1 April 1970 to 11 October 19701971: 5 March 1971 to 16 July 19711972: 3 January 1972 to 12 December 197219241930193619441950195619631971JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Penrose meeting 10 mm (0.39 in).
First to last qualifying date each year at Penrose
YearFirst dateLast date
19241924-03-121924-12-23
19251925-02-071925-12-14
19261926-04-121926-10-30
19271927-03-101927-11-29
19281928-03-151928-11-28
19291929-07-181929-11-12
19301930-02-251930-11-19
19311931-02-281931-11-23
19321932-04-231932-08-22
19331933-04-211933-12-02
19341934-02-101934-08-02
19351935-04-241935-09-27
19361936-05-081936-10-25
19371937-05-291937-10-16
19381938-04-141938-09-13
19391939-03-271939-06-28
19411941-03-121941-12-22
19431943-04-081943-08-18
19441944-03-181944-07-19
19451945-04-141945-10-23
19461946-07-071946-11-04
19471947-04-191947-10-12
19481948-03-011948-08-15
19491949-02-261949-10-30
19501950-06-031950-06-19
19511951-05-211951-11-05
19521952-04-211952-08-22
19531953-04-041953-07-15
19541954-04-301954-08-14
19551955-05-101955-09-23
19561956-04-151956-08-03
19581958-03-301958-10-31
19591959-03-251959-10-13
19601960-01-141960-12-10
19611961-07-071961-09-03
19621962-01-091962-10-19
19631963-03-041963-09-20
19641964-05-271964-11-18
19661966-04-201966-09-27
19671967-04-141967-12-28
19691969-04-161969-10-21
19701970-04-011970-10-11
19711971-03-051971-07-16
19721972-01-031972-12-12

Every Fixed Threshold

Fixed thresholds at Penrose
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4417196716
25 mm (0.98 in): Days with 25 mm or more rain25719671
50 mm (1.97 in): Days with 50 mm or more rain5119521
10 cm (3.9 in): Days with 10 cm or more snowfall24619593
25 cm (9.8 in): Days with 25 cm or more snowfall4219652

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1924.

Download the Data

  • Data for Penrose 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).