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Built 2026-10-19 (19 October 2026)

Fontana Kaiser Threshold Days by Year (USC00043120)

14 fixed thresholds counted per year at Fontana Kaiser (USC00043120): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Fontana Kaiser Thresholds

  • Fontana Kaiser: days with 10 mm (0.39 in) or more of precipitation in 31 years, most in 1978 with 23.
  • Fontana Kaiser: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 1958 with 151.
  • Fontana Kaiser: days with a maximum temperature at or above 35 C (95 F) in 29 years, most in 1971 with 85.
  • Fontana Kaiser: days with a maximum temperature at or above 90 F (32.2 C) in 29 years, most in 1971 with 118.
  • 14 fixed thresholds have at least one qualifying day at Fontana Kaiser.
29 years with a qualifying day
Days at or above 30 C (86 F) per year at Fontana Kaiser Days per year at Fontana Kaiser with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 151 in 1958. 0501001502001952: 1351954: 991955: 1171956: 1461957: 1121958: 1511960: 1411961: 1191962: 1311963: 1081964: 1301965: 1221966: 1391967: 1311968: 1401969: 1261970: 1391971: 1441972: 1341973: 941974: 1381975: 1151976: 1251977: 1381978: 1391979: 1161980: 1201981: 1341982: 871952195619601963196619691972197519781981
Days per year at Fontana Kaiser with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 151 in 1958.
Days at or above 30 C (86 F) per year at Fontana Kaiser
YearDaysDecade average
1952135126.7
195499126.7
1955117126.7
1956146126.7
1957112126.7
1958151126.7
1960141128.7
1961119128.7
1962131128.7
1963108128.7
1964130128.7
1965122128.7
1966139128.7
1967131128.7
1968140128.7
1969126128.7
1970139128.2
1971144128.2
1972134128.2
197394128.2
1974138128.2
1975115128.2
1976125128.2
1977138128.2
1978139128.2
1979116128.2
1980120113.7
1981134113.7
198287113.7
First to last qualifying date each year at Fontana Kaiser For each year, a bar from the first to the last day at Fontana Kaiser meeting 30 C (86 F). 1952: 4 April 1952 to 6 November 19521954: 23 February 1954 to 21 October 19541955: 25 March 1955 to 9 November 19551956: 24 March 1956 to 30 December 19561957: 12 February 1957 to 25 October 19571958: 15 April 1958 to 17 December 19581960: 18 March 1960 to 22 October 19601961: 1 April 1961 to 25 October 19611962: 7 January 1962 to 8 November 19621963: 3 February 1963 to 12 November 19631964: 29 March 1964 to 30 November 19641965: 19 April 1965 to 4 November 19651966: 18 March 1966 to 3 November 19661967: 5 February 1967 to 13 November 19671968: 23 February 1968 to 23 November 19681969: 25 March 1969 to 12 November 19691970: 7 February 1970 to 9 November 19701971: 17 January 1971 to 4 November 19711972: 27 February 1972 to 23 October 19721973: 2 May 1973 to 10 December 19731974: 25 February 1974 to 13 November 19741975: 3 March 1975 to 8 December 19751976: 17 January 1976 to 22 November 19761977: 12 February 1977 to 6 December 19771978: 15 March 1978 to 8 November 19781979: 11 May 1979 to 6 December 19791980: 16 April 1980 to 28 November 19801981: 18 February 1981 to 8 November 19811982: 19 April 1982 to 23 October 198219521957196219661970197419781982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Fontana Kaiser meeting 30 C (86 F).
First to last qualifying date each year at Fontana Kaiser
YearFirst dateLast date
19521952-04-041952-11-06
19541954-02-231954-10-21
19551955-03-251955-11-09
19561956-03-241956-12-30
19571957-02-121957-10-25
19581958-04-151958-12-17
19601960-03-181960-10-22
19611961-04-011961-10-25
19621962-01-071962-11-08
19631963-02-031963-11-12
19641964-03-291964-11-30
19651965-04-191965-11-04
19661966-03-181966-11-03
19671967-02-051967-11-13
19681968-02-231968-11-23
19691969-03-251969-11-12
19701970-02-071970-11-09
19711971-01-171971-11-04
19721972-02-271972-10-23
19731973-05-021973-12-10
19741974-02-251974-11-13
19751975-03-031975-12-08
19761976-01-171976-11-22
19771977-02-121977-12-06
19781978-03-151978-11-08
19791979-05-111979-12-06
19801980-04-161980-11-28
19811981-02-181981-11-08
19821982-04-191982-10-23

Every Fixed Threshold

Fixed thresholds at Fontana Kaiser
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days29151195887
35 C (95 F): Days2985197138
40 C (104 F): Days263119719
45 C (113 F): Days3319711
90 F (32.2 C): Days29118197166
100 F (37.8 C): Days2952197118
110 F (43.3 C): Days11519551
0 C (32 F): Frost days (min211419794
20 C (68 F): Tropical nights (min2952197116
25 C (77 F): Days with min11819714
10 mm (0.39 in): Days with 10 mm or more rain3123197825
25 mm (0.98 in): Days with 25 mm or more rain2913198011
50 mm (1.97 in): Days with 50 mm or more rain14519804
100 mm (3.94 in): Days with 100 mm or more rain1119561

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.

Download the Data

  • Data for Fontana Kaiser 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).