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

Phoenix Threshold Days by Year (USW00023104)

13 fixed thresholds counted per year at Phoenix (USW00023104): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Phoenix Thresholds

  • Phoenix: days with a maximum temperature at or above 30 C (86 F) in 14 years, most in 1950 with 197.
  • Phoenix: days with a maximum temperature at or above 35 C (95 F) in 14 years, most in 1952 with 143.
  • Phoenix: days with a maximum temperature at or above 40 C (104 F) in 14 years, most in 2025 with 68.
  • Phoenix: days with a maximum temperature at or above 90 F (32.2 C) in 14 years, most in 1954 with 183.
  • 13 fixed thresholds have at least one qualifying day at Phoenix.
14 years with a qualifying day
Days at or above 30 C (86 F) per year at Phoenix Days per year at Phoenix with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 197 in 1950. 0501001502001949: 1811950: 1971951: 1701952: 1941953: 1781954: 1951955: 1811956: 1891957: 1571958: 1771959: 1841960: 1751964: 1672025: 1971949195119531955195719591964
Days per year at Phoenix with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 197 in 1950.
Days at or above 30 C (86 F) per year at Phoenix
YearDaysDecade average
1949181181
1950197182.2
1951170182.2
1952194182.2
1953178182.2
1954195182.2
1955181182.2
1956189182.2
1957157182.2
1958177182.2
1959184182.2
1960175171
1964167171
2025197197
First to last qualifying date each year at Phoenix For each year, a bar from the first to the last day at Phoenix meeting 30 C (86 F). 1949: 10 April 1949 to 7 November 19491950: 29 March 1950 to 24 November 19501951: 12 April 1951 to 24 October 19511952: 3 April 1952 to 6 November 19521953: 24 March 1953 to 14 November 19531954: 23 February 1954 to 11 November 19541955: 8 March 1955 to 20 November 19551956: 17 March 1956 to 10 November 19561957: 13 February 1957 to 10 October 19571958: 15 April 1958 to 24 October 19581959: 1 April 1959 to 28 October 19591960: 19 March 1960 to 3 November 19601964: 30 March 1964 to 29 October 19642025: 24 February 2025 to 14 November 20251949195119531955195719591964JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Phoenix meeting 30 C (86 F).
First to last qualifying date each year at Phoenix
YearFirst dateLast date
19491949-04-101949-11-07
19501950-03-291950-11-24
19511951-04-121951-10-24
19521952-04-031952-11-06
19531953-03-241953-11-14
19541954-02-231954-11-11
19551955-03-081955-11-20
19561956-03-171956-11-10
19571957-02-131957-10-10
19581958-04-151958-10-24
19591959-04-011959-10-28
19601960-03-191960-11-03
19641964-03-301964-10-29
20252025-02-242025-11-14

Every Fixed Threshold

Fixed thresholds at Phoenix
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days141971950197
35 C (95 F): Days141431952139
40 C (104 F): Days1468202568
45 C (113 F): Days6920259
90 F (32.2 C): Days141831954158
100 F (37.8 C): Days141032025103
110 F (43.3 C): Days1315202515
0 C (32 F): Frost days (min143719648
20 C (68 F): Tropical nights (min141382025138
25 C (77 F): Days with min1482202582
10 mm (0.39 in): Days with 10 mm or more rain14919596
25 mm (0.98 in): Days with 25 mm or more rain10419512
50 mm (1.97 in): Days with 50 mm or more rain1119511

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

  • Data for Phoenix 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).