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

Norton AFB Threshold Days by Year (USW00023122)

14 fixed thresholds counted per year at Norton AFB (USW00023122): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Norton AFB Thresholds

  • Norton AFB: days with a maximum temperature at or above 30 C (86 F) in 23 years, most in 1949 with 142.
  • Norton AFB: days with a maximum temperature at or above 35 C (95 F) in 23 years, most in 1970 with 71.
  • Norton AFB: days with a maximum temperature at or above 40 C (104 F) in 23 years, most in 1955 with 12.
  • Norton AFB: days with a maximum temperature at or above 90 F (32.2 C) in 23 years, most in 1960 with 112.
  • 14 fixed thresholds have at least one qualifying day at Norton AFB.
23 years with a qualifying day
Days at or above 30 C (86 F) per year at Norton AFB Days per year at Norton AFB with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 142 in 1949. 0501001501949: 1421950: 1181951: 1211952: 1291953: 1051954: 1121955: 1111956: 1151957: 1141958: 1411959: 1191960: 1411961: 1211962: 1341963: 1061964: 1151965: 1181966: 1291967: 1291968: 1211969: 1081970: 1242025: 13719491952195519581961196419671970
Days per year at Norton AFB with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 142 in 1949.
Days at or above 30 C (86 F) per year at Norton AFB
YearDaysDecade average
1949142142
1950118118.5
1951121118.5
1952129118.5
1953105118.5
1954112118.5
1955111118.5
1956115118.5
1957114118.5
1958141118.5
1959119118.5
1960141122.2
1961121122.2
1962134122.2
1963106122.2
1964115122.2
1965118122.2
1966129122.2
1967129122.2
1968121122.2
1969108122.2
1970124124
2025137137
First to last qualifying date each year at Norton AFB For each year, a bar from the first to the last day at Norton AFB meeting 30 C (86 F). 1949: 10 April 1949 to 24 November 19491950: 29 March 1950 to 25 November 19501951: 9 February 1951 to 5 November 19511952: 25 March 1952 to 28 October 19521953: 23 March 1953 to 1 November 19531954: 23 February 1954 to 21 October 19541955: 25 March 1955 to 10 November 19551956: 23 March 1956 to 11 November 19561957: 12 February 1957 to 9 October 19571958: 15 April 1958 to 6 November 19581959: 31 March 1959 to 24 October 19591960: 19 March 1960 to 30 October 19601961: 1 April 1961 to 25 October 19611962: 7 January 1962 to 8 November 19621963: 3 February 1963 to 11 November 19631964: 12 April 1964 to 21 October 19641965: 19 April 1965 to 4 November 19651966: 30 March 1966 to 2 November 19661967: 7 May 1967 to 13 November 19671968: 24 February 1968 to 23 November 19681969: 20 April 1969 to 4 November 19691970: 8 February 1970 to 3 November 19702025: 26 February 2025 to 11 December 202519491952195519581961196419671970JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Norton AFB meeting 30 C (86 F).
First to last qualifying date each year at Norton AFB
YearFirst dateLast date
19491949-04-101949-11-24
19501950-03-291950-11-25
19511951-02-091951-11-05
19521952-03-251952-10-28
19531953-03-231953-11-01
19541954-02-231954-10-21
19551955-03-251955-11-10
19561956-03-231956-11-11
19571957-02-121957-10-09
19581958-04-151958-11-06
19591959-03-311959-10-24
19601960-03-191960-10-30
19611961-04-011961-10-25
19621962-01-071962-11-08
19631963-02-031963-11-11
19641964-04-121964-10-21
19651965-04-191965-11-04
19661966-03-301966-11-02
19671967-05-071967-11-13
19681968-02-241968-11-23
19691969-04-201969-11-04
19701970-02-081970-11-03
20252025-02-262025-12-11

Every Fixed Threshold

Fixed thresholds at Norton AFB
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days231421949137
35 C (95 F): Days2371197062
40 C (104 F): Days231219553
45 C (113 F): Days1119551
90 F (32.2 C): Days23112196095
100 F (37.8 C): Days2329197019
110 F (43.3 C): Days4319551
0 C (32 F): Frost days (min213219491
20 C (68 F): Tropical nights (min2323202523
10 mm (0.39 in): Days with 10 mm or more rain2223196911
25 mm (0.98 in): Days with 25 mm or more rain21819692
50 mm (1.97 in): Days with 50 mm or more rain7219662
100 mm (3.94 in): Days with 100 mm or more rain1119561
10 cm (3.9 in): Days with 10 cm or more snowfall2119491

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 Norton AFB 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).