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Built 2026-10-19 (19 October 2026)

Maricopa 9 SSW Threshold Days by Year (USC00025274)

16 fixed thresholds counted per year at Maricopa 9 SSW (USC00025274): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Maricopa 9 SSW Thresholds

  • Maricopa 9 SSW: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1941 with 19.
  • Maricopa 9 SSW: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 1913 with 221.
  • Maricopa 9 SSW: days with a maximum temperature at or above 35 C (95 F) in 37 years, most in 1937 with 166.
  • Maricopa 9 SSW: days with a maximum temperature at or above 40 C (104 F) in 37 years, most in 1937 with 105.
  • 16 fixed thresholds have at least one qualifying day at Maricopa 9 SSW.
37 years with a qualifying day
Days at or above 30 C (86 F) per year at Maricopa 9 SSW Days per year at Maricopa 9 SSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 221 in 1913. 01002003001903: 1771904: 1871905: 1831906: 2161907: 2011912: 1721913: 2211915: 1881916: 2061917: 1911918: 1871919: 1831920: 1621921: 1831922: 1761923: 1761924: 1621925: 1901926: 1621927: 1691928: 1731929: 1771930: 1471931: 1611932: 1901933: 1911935: 1811936: 1951937: 2111938: 1811941: 1701945: 1981946: 1671947: 1821948: 1941949: 2071950: 2081903190719161920192419281932193719461950
Days per year at Maricopa 9 SSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 221 in 1913.
Days at or above 30 C (86 F) per year at Maricopa 9 SSW
YearDaysDecade average
1903177192.8
1904187192.8
1905183192.8
1906216192.8
1907201192.8
1912172192.6
1913221192.6
1915188192.6
1916206192.6
1917191192.6
1918187192.6
1919183192.6
1920162173
1921183173
1922176173
1923176173
1924162173
1925190173
1926162173
1927169173
1928173173
1929177173
1930147182.1
1931161182.1
1932190182.1
1933191182.1
1935181182.1
1936195182.1
1937211182.1
1938181182.1
1941170186.3
1945198186.3
1946167186.3
1947182186.3
1948194186.3
1949207186.3
1950208208
First to last qualifying date each year at Maricopa 9 SSW For each year, a bar from the first to the last day at Maricopa 9 SSW meeting 30 C (86 F). 1903: 29 March 1903 to 27 November 19031904: 23 February 1904 to 23 October 19041905: 4 April 1905 to 2 November 19051906: 27 February 1906 to 15 November 19061907: 4 March 1907 to 5 November 19071912: 15 January 1912 to 10 November 19121913: 18 March 1913 to 13 November 19131915: 24 March 1915 to 6 November 19151916: 19 February 1916 to 5 November 19161917: 28 March 1917 to 12 November 19171918: 24 March 1918 to 1 November 19181919: 19 March 1919 to 22 October 19191920: 7 April 1920 to 12 October 19201921: 25 February 1921 to 7 November 19211922: 20 April 1922 to 26 October 19221923: 10 April 1923 to 10 November 19231924: 2 March 1924 to 22 November 19241925: 5 March 1925 to 2 November 19251926: 2 March 1926 to 30 October 19261927: 25 March 1927 to 5 November 19271928: 20 March 1928 to 13 November 19281929: 29 March 1929 to 4 November 19291930: 17 February 1930 to 9 November 19301931: 19 March 1931 to 7 November 19311932: 28 February 1932 to 7 November 19321933: 28 March 1933 to 25 November 19331935: 28 March 1935 to 29 October 19351936: 1 March 1936 to 17 November 19361937: 8 March 1937 to 6 November 19371938: 20 March 1938 to 8 November 19381941: 23 April 1941 to 12 November 19411945: 21 March 1945 to 5 November 19451946: 24 February 1946 to 15 October 19461947: 16 February 1947 to 1 November 19471948: 2 April 1948 to 27 October 19481949: 18 March 1949 to 17 November 19491950: 22 March 1950 to 10 December 195019031912191819231928193319411949JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Maricopa 9 SSW meeting 30 C (86 F).
First to last qualifying date each year at Maricopa 9 SSW
YearFirst dateLast date
19031903-03-291903-11-27
19041904-02-231904-10-23
19051905-04-041905-11-02
19061906-02-271906-11-15
19071907-03-041907-11-05
19121912-01-151912-11-10
19131913-03-181913-11-13
19151915-03-241915-11-06
19161916-02-191916-11-05
19171917-03-281917-11-12
19181918-03-241918-11-01
19191919-03-191919-10-22
19201920-04-071920-10-12
19211921-02-251921-11-07
19221922-04-201922-10-26
19231923-04-101923-11-10
19241924-03-021924-11-22
19251925-03-051925-11-02
19261926-03-021926-10-30
19271927-03-251927-11-05
19281928-03-201928-11-13
19291929-03-291929-11-04
19301930-02-171930-11-09
19311931-03-191931-11-07
19321932-02-281932-11-07
19331933-03-281933-11-25
19351935-03-281935-10-29
19361936-03-011936-11-17
19371937-03-081937-11-06
19381938-03-201938-11-08
19411941-04-231941-11-12
19451945-03-211945-11-05
19461946-02-241946-10-15
19471947-02-161947-11-01
19481948-04-021948-10-27
19491949-03-181949-11-17
19501950-03-221950-12-10

Every Fixed Threshold

Fixed thresholds at Maricopa 9 SSW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days372211913208
35 C (95 F): Days371661937158
40 C (104 F): Days37105193759
45 C (113 F): Days362919053
50 C (122 F): Days2119051
90 F (32.2 C): Days371961937183
100 F (37.8 C): Days371281922117
110 F (43.3 C): Days3759190525
120 F (48.9 C): Days5319051
0 C (32 F): Frost days (min3483194860
-10 C (14 F): Days with min5419504
20 C (68 F): Tropical nights (min34102192246
25 C (77 F): Days with min3444192211
10 mm (0.39 in): Days with 10 mm or more rain421919415
25 mm (0.98 in): Days with 25 mm or more rain28419064
50 mm (1.97 in): Days with 50 mm or more rain8119161

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

Download the Data

  • Data for Maricopa 9 SSW 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).