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Built 2026-10-19 (19 October 2026)

Casa Grande Threshold Days by Year (USC00021306)

16 fixed thresholds counted per year at Casa Grande (USC00021306): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Casa Grande Thresholds

  • Casa Grande: days with 10 mm (0.39 in) or more of precipitation in 95 years, most in 1905 with 19.
  • Casa Grande: nights with a minimum temperature at or above 20 C (68 F) in 74 years, most in 2022 with 119.
  • Casa Grande: nights with a minimum temperature at or above 25 C (77 F) in 74 years, most in 1905 with 65.
  • Casa Grande: nights with a minimum temperature at or below 0 C (32 F) in 73 years, most in 1929 with 68.
  • 16 fixed thresholds have at least one qualifying day at Casa Grande.
66 years with a qualifying day
Days at or above 30 C (86 F) per year at Casa Grande Days per year at Casa Grande with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 262 in 1907. 01002003001904: 1931905: 1811906: 1981907: 2621919: 1711927: 1721929: 1911930: 1881931: 2071932: 1951933: 1871934: 2381935: 1811936: 2001937: 2091941: 1681942: 1891943: 2001944: 1831947: 1951948: 1951949: 1881950: 2251951: 1881952: 2021953: 1891954: 2071957: 1691958: 1921959: 1971960: 1931961: 1951962: 2001963: 1981964: 1811966: 2051967: 2181968: 1871969: 1811970: 1641973: 1871974: 1961975: 1801976: 1921977: 1891979: 2021980: 1991981: 2151982: 1791983: 1801985: 1741986: 1991987: 1821989: 1991992: 1901993: 1742002: 1842005: 1992006: 1932020: 2012021: 2142022: 1962023: 2012024: 1872025: 2132026: 1221904193019371949195819661975198320022024
Days per year at Casa Grande with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 262 in 1907.
Days at or above 30 C (86 F) per year at Casa Grande
YearDaysDecade average
1904193208.5
1905181208.5
1906198208.5
1907262208.5
1919171171
1927172181.5
1929191181.5
1930188200.6
1931207200.6
1932195200.6
1933187200.6
1934238200.6
1935181200.6
1936200200.6
1937209200.6
1941168188.3
1942189188.3
1943200188.3
1944183188.3
1947195188.3
1948195188.3
1949188188.3
1950225196.1
1951188196.1
1952202196.1
1953189196.1
1954207196.1
1957169196.1
1958192196.1
1959197196.1
1960193195.3
1961195195.3
1962200195.3
1963198195.3
1964181195.3
1966205195.3
1967218195.3
1968187195.3
1969181195.3
1970164187.1
1973187187.1
1974196187.1
1975180187.1
1976192187.1
1977189187.1
1979202187.1
1980199190.9
1981215190.9
1982179190.9
1983180190.9
1985174190.9
1986199190.9
1987182190.9
1989199190.9
1992190182
1993174182
2002184192
2005199192
2006193192
2020201190.6
2021214190.6
2022196190.6
2023201190.6
2024187190.6
2025213190.6
2026122190.6
First to last qualifying date each year at Casa Grande For each year, a bar from the first to the last day at Casa Grande meeting 30 C (86 F). 1904: 21 February 1904 to 23 November 19041905: 27 March 1905 to 2 November 19051906: 28 February 1906 to 24 December 19061907: 1 February 1907 to 31 December 19071919: 31 March 1919 to 6 October 19191927: 8 January 1927 to 20 November 19271929: 30 March 1929 to 19 November 19291930: 8 February 1930 to 5 November 19301931: 22 March 1931 to 7 November 19311932: 28 February 1932 to 8 November 19321933: 10 March 1933 to 26 November 19331934: 4 March 1934 to 16 November 19341935: 20 February 1935 to 27 October 19351936: 7 March 1936 to 16 November 19361937: 9 March 1937 to 6 November 19371941: 24 April 1941 to 12 November 19411942: 22 March 1942 to 15 November 19421943: 15 February 1943 to 19 November 19431944: 2 April 1944 to 4 November 19441947: 17 February 1947 to 2 November 19471948: 22 February 1948 to 4 November 19481949: 16 March 1949 to 8 November 19491950: 22 March 1950 to 11 December 19501951: 11 February 1951 to 30 October 19511952: 3 April 1952 to 7 November 19521953: 20 March 1953 to 30 November 19531954: 6 February 1954 to 12 November 19541957: 14 February 1957 to 10 October 19571958: 15 April 1958 to 10 November 19581959: 22 March 1959 to 29 October 19591960: 6 March 1960 to 6 November 19601961: 14 March 1961 to 27 October 19611962: 10 February 1962 to 12 November 19621963: 4 February 1963 to 12 November 19631964: 29 March 1964 to 30 October 19641966: 12 March 1966 to 15 November 19661967: 24 February 1967 to 19 November 19671968: 27 March 1968 to 31 October 19681969: 28 March 1969 to 2 November 19691970: 6 April 1970 to 6 November 19701973: 10 April 1973 to 13 November 19731974: 15 March 1974 to 26 October 19741975: 20 March 1975 to 8 November 19751976: 29 February 1976 to 7 November 19761977: 22 March 1977 to 3 November 19771979: 7 March 1979 to 3 November 19791980: 27 February 1980 to 12 November 19801981: 19 February 1981 to 17 November 19811982: 22 February 1982 to 30 October 19821983: 31 March 1983 to 1 November 19831985: 2 April 1985 to 4 November 19851986: 20 January 1986 to 2 November 19861987: 2 April 1987 to 29 October 19871989: 23 February 1989 to 15 November 19891992: 9 April 1992 to 24 October 19921993: 23 March 1993 to 6 November 19932002: 12 March 2002 to 22 November 20022005: 10 March 2005 to 9 November 20052006: 8 February 2006 to 22 November 20062020: 6 March 2020 to 20 November 20202021: 6 March 2021 to 15 November 20212022: 3 March 2022 to 15 October 20222023: 9 April 2023 to 15 November 20232024: 29 March 2024 to 29 October 20242025: 4 February 2025 to 14 November 20252026: 25 February 2026 to 11 October 202619041932194419571967197919922024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Casa Grande meeting 30 C (86 F).
First to last qualifying date each year at Casa Grande
YearFirst dateLast date
19041904-02-211904-11-23
19051905-03-271905-11-02
19061906-02-281906-12-24
19071907-02-011907-12-31
19191919-03-311919-10-06
19271927-01-081927-11-20
19291929-03-301929-11-19
19301930-02-081930-11-05
19311931-03-221931-11-07
19321932-02-281932-11-08
19331933-03-101933-11-26
19341934-03-041934-11-16
19351935-02-201935-10-27
19361936-03-071936-11-16
19371937-03-091937-11-06
19411941-04-241941-11-12
19421942-03-221942-11-15
19431943-02-151943-11-19
19441944-04-021944-11-04
19471947-02-171947-11-02
19481948-02-221948-11-04
19491949-03-161949-11-08
19501950-03-221950-12-11
19511951-02-111951-10-30
19521952-04-031952-11-07
19531953-03-201953-11-30
19541954-02-061954-11-12
19571957-02-141957-10-10
19581958-04-151958-11-10
19591959-03-221959-10-29
19601960-03-061960-11-06
19611961-03-141961-10-27
19621962-02-101962-11-12
19631963-02-041963-11-12
19641964-03-291964-10-30
19661966-03-121966-11-15
19671967-02-241967-11-19
19681968-03-271968-10-31
19691969-03-281969-11-02
19701970-04-061970-11-06
19731973-04-101973-11-13
19741974-03-151974-10-26
19751975-03-201975-11-08
19761976-02-291976-11-07
19771977-03-221977-11-03
19791979-03-071979-11-03
19801980-02-271980-11-12
19811981-02-191981-11-17
19821982-02-221982-10-30
19831983-03-311983-11-01
19851985-04-021985-11-04
19861986-01-201986-11-02
19871987-04-021987-10-29
19891989-02-231989-11-15
19921992-04-091992-10-24
19931993-03-231993-11-06
20022002-03-122002-11-22
20052005-03-102005-11-09
20062006-02-082006-11-22
20202020-03-062020-11-20
20212021-03-062021-11-15
20222022-03-032022-10-15
20232023-04-092023-11-15
20242024-03-292024-10-29
20252025-02-042025-11-14
20262026-02-252026-10-11

Every Fixed Threshold

Fixed thresholds at Casa Grande
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days662621907122
35 C (95 F): Days661761934100
40 C (104 F): Days66109202068
45 C (113 F): Days5750190713
50 C (122 F): Days1119051
90 F (32.2 C): Days662141934112
100 F (37.8 C): Days66143202087
110 F (43.3 C): Days6672190735
120 F (48.9 C): Days3219051
0 C (32 F): Frost days (min7368192914
20 C (68 F): Tropical nights (min74119202296
25 C (77 F): Days with min7465190562
10 mm (0.39 in): Days with 10 mm or more rain951919052
25 mm (0.98 in): Days with 25 mm or more rain57819052
50 mm (1.97 in): Days with 50 mm or more rain11119051
100 mm (3.94 in): Days with 100 mm or more rain2119361

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

  • Data for Casa Grande 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 (2026-10-17).