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Built 2026-10-19 (19 October 2026)

Trona Threshold Days by Year (USC00049035)

16 fixed thresholds counted per year at Trona (USC00049035): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Trona Thresholds

  • Trona: days with a maximum temperature at or above 30 C (86 F) in 96 years, most in 1950 with 187.
  • Trona: days with a maximum temperature at or above 35 C (95 F) in 96 years, most in 1943 with 138.
  • Trona: days with a maximum temperature at or above 40 C (104 F) in 96 years, most in 2024 with 99.
  • Trona: days with a maximum temperature at or above 90 F (32.2 C) in 96 years, most in 1950 with 166.
  • 16 fixed thresholds have at least one qualifying day at Trona.
96 years with a qualifying day
Days at or above 30 C (86 F) per year at Trona Days per year at Trona with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 187 in 1950. 0501001502001920: 1471921: 1541922: 1611923: 1441924: 1601925: 1521926: 1741927: 1611928: 1681929: 1631930: 1471932: 1541933: 1581934: 1851935: 1551936: 1701937: 1751938: 1641939: 1741940: 1811941: 1461942: 1631943: 1751944: 1631945: 1721946: 1681947: 1671948: 1661949: 1771950: 1871951: 1681952: 1741953: 1551954: 1821955: 1591956: 1691957: 1381958: 1711959: 1741960: 1761961: 1621962: 1711963: 1511964: 1651965: 1591966: 1831967: 1631968: 1251969: 1531970: 1541971: 1401972: 1571973: 1681974: 1651975: 1531976: 1561977: 1591978: 1501980: 1501982: 1461983: 1391984: 1581985: 1601986: 1501987: 1741988: 1801989: 1841990: 1651991: 1601992: 1481996: 1821998: 1062001: 1592003: 1272005: 1512006: 1572007: 1732008: 1562009: 1562010: 1522011: 1532012: 1772013: 1632014: 1792015: 1682016: 1562017: 1692018: 1742019: 1462020: 1782021: 1682022: 1792023: 1672024: 1782025: 1832026: 1891920193019411951196119711983199620112021
Days per year at Trona with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 187 in 1950.
Days at or above 30 C (86 F) per year at Trona
YearDaysDecade average
1920147158.4
1921154158.4
1922161158.4
1923144158.4
1924160158.4
1925152158.4
1926174158.4
1927161158.4
1928168158.4
1929163158.4
1930147164.7
1932154164.7
1933158164.7
1934185164.7
1935155164.7
1936170164.7
1937175164.7
1938164164.7
1939174164.7
1940181167.8
1941146167.8
1942163167.8
1943175167.8
1944163167.8
1945172167.8
1946168167.8
1947167167.8
1948166167.8
1949177167.8
1950187167.7
1951168167.7
1952174167.7
1953155167.7
1954182167.7
1955159167.7
1956169167.7
1957138167.7
1958171167.7
1959174167.7
1960176160.8
1961162160.8
1962171160.8
1963151160.8
1964165160.8
1965159160.8
1966183160.8
1967163160.8
1968125160.8
1969153160.8
1970154155.8
1971140155.8
1972157155.8
1973168155.8
1974165155.8
1975153155.8
1976156155.8
1977159155.8
1978150155.8
1980150160.1
1982146160.1
1983139160.1
1984158160.1
1985160160.1
1986150160.1
1987174160.1
1988180160.1
1989184160.1
1990165152.2
1991160152.2
1992148152.2
1996182152.2
1998106152.2
2001159154.1
2003127154.1
2005151154.1
2006157154.1
2007173154.1
2008156154.1
2009156154.1
2010152163.7
2011153163.7
2012177163.7
2013163163.7
2014179163.7
2015168163.7
2016156163.7
2017169163.7
2018174163.7
2019146163.7
2020178177.4
2021168177.4
2022179177.4
2023167177.4
2024178177.4
2025183177.4
2026189177.4
First to last qualifying date each year at Trona For each year, a bar from the first to the last day at Trona meeting 30 C (86 F). 1920: 6 April 1920 to 6 October 19201921: 2 March 1921 to 21 October 19211922: 22 April 1922 to 19 October 19221923: 12 April 1923 to 21 October 19231924: 10 April 1924 to 26 October 19241925: 20 March 1925 to 20 October 19251926: 15 March 1926 to 28 October 19261927: 21 April 1927 to 24 October 19271928: 20 March 1928 to 24 October 19281929: 16 April 1929 to 22 October 19291930: 25 March 1930 to 24 October 19301932: 1 April 1932 to 16 October 19321933: 1 April 1933 to 29 October 19331934: 5 March 1934 to 30 October 19341935: 13 April 1935 to 10 October 19351936: 8 April 1936 to 14 October 19361937: 14 April 1937 to 30 October 19371938: 16 March 1938 to 28 October 19381939: 16 March 1939 to 30 October 19391940: 22 March 1940 to 23 October 19401941: 24 April 1941 to 5 November 19411942: 31 March 1942 to 2 November 19421943: 27 March 1943 to 24 October 19431944: 2 April 1944 to 29 October 19441945: 11 March 1945 to 4 November 19451946: 26 March 1946 to 26 October 19461947: 17 March 1947 to 27 October 19471948: 14 April 1948 to 27 October 19481949: 11 April 1949 to 7 November 19491950: 20 March 1950 to 21 November 19501951: 17 March 1951 to 21 October 19511952: 3 April 1952 to 30 October 19521953: 28 March 1953 to 30 October 19531954: 5 April 1954 to 24 October 19541955: 26 March 1955 to 30 October 19551956: 23 March 1956 to 22 October 19561957: 5 April 1957 to 9 October 19571958: 16 April 1958 to 20 October 19581959: 2 April 1959 to 27 October 19591960: 21 March 1960 to 26 October 19601961: 15 March 1961 to 20 October 19611962: 28 March 1962 to 1 November 19621963: 27 February 1963 to 16 October 19631964: 31 March 1964 to 24 October 19641965: 20 April 1965 to 3 November 19651966: 29 March 1966 to 2 November 19661967: 8 May 1967 to 3 November 19671968: 31 March 1968 to 28 October 19681969: 29 March 1969 to 10 October 19691970: 24 March 1970 to 15 October 19701971: 27 March 1971 to 17 October 19711972: 5 March 1972 to 11 October 19721973: 24 April 1973 to 11 November 19731974: 8 April 1974 to 22 October 19741975: 2 May 1975 to 21 October 19751976: 20 April 1976 to 16 October 19761977: 6 April 1977 to 26 October 19771978: 3 May 1978 to 18 October 19781980: 9 April 1980 to 10 November 19801982: 25 April 1982 to 23 October 19821983: 7 May 1983 to 26 October 19831984: 10 April 1984 to 13 October 19841985: 2 April 1985 to 27 October 19851986: 26 February 1986 to 29 October 19861987: 8 April 1987 to 21 October 19871988: 25 March 1988 to 6 November 19881989: 25 February 1989 to 19 October 19891990: 23 March 1990 to 11 November 19901991: 4 April 1991 to 8 November 19911992: 21 April 1992 to 21 October 19921996: 7 February 1996 to 18 October 19961998: 22 April 1998 to 28 September 19982001: 26 April 2001 to 18 October 20012003: 16 May 2003 to 22 October 20032005: 13 April 2005 to 25 October 20052006: 14 April 2006 to 9 November 20062007: 12 March 2007 to 8 November 20072008: 13 April 2008 to 31 October 20082009: 19 April 2009 to 25 October 20092010: 30 March 2010 to 5 November 20102011: 1 April 2011 to 26 October 20112012: 10 April 2012 to 8 November 20122013: 15 March 2013 to 28 October 20132014: 18 March 2014 to 31 October 20142015: 16 March 2015 to 2 November 20152016: 21 March 2016 to 28 October 20162017: 13 March 2017 to 30 October 20172018: 31 March 2018 to 30 October 20182019: 8 April 2019 to 5 November 20192020: 23 April 2020 to 4 November 20202021: 30 March 2021 to 8 November 20212022: 25 March 2022 to 22 October 20222023: 10 April 2023 to 23 October 20232024: 12 April 2024 to 27 October 20242025: 25 March 2025 to 10 November 20252026: 28 February 2026 to 12 October 202619201933194519571969198320012015JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Trona meeting 30 C (86 F).
First to last qualifying date each year at Trona
YearFirst dateLast date
19201920-04-061920-10-06
19211921-03-021921-10-21
19221922-04-221922-10-19
19231923-04-121923-10-21
19241924-04-101924-10-26
19251925-03-201925-10-20
19261926-03-151926-10-28
19271927-04-211927-10-24
19281928-03-201928-10-24
19291929-04-161929-10-22
19301930-03-251930-10-24
19321932-04-011932-10-16
19331933-04-011933-10-29
19341934-03-051934-10-30
19351935-04-131935-10-10
19361936-04-081936-10-14
19371937-04-141937-10-30
19381938-03-161938-10-28
19391939-03-161939-10-30
19401940-03-221940-10-23
19411941-04-241941-11-05
19421942-03-311942-11-02
19431943-03-271943-10-24
19441944-04-021944-10-29
19451945-03-111945-11-04
19461946-03-261946-10-26
19471947-03-171947-10-27
19481948-04-141948-10-27
19491949-04-111949-11-07
19501950-03-201950-11-21
19511951-03-171951-10-21
19521952-04-031952-10-30
19531953-03-281953-10-30
19541954-04-051954-10-24
19551955-03-261955-10-30
19561956-03-231956-10-22
19571957-04-051957-10-09
19581958-04-161958-10-20
19591959-04-021959-10-27
19601960-03-211960-10-26
19611961-03-151961-10-20
19621962-03-281962-11-01
19631963-02-271963-10-16
19641964-03-311964-10-24
19651965-04-201965-11-03
19661966-03-291966-11-02
19671967-05-081967-11-03
19681968-03-311968-10-28
19691969-03-291969-10-10
19701970-03-241970-10-15
19711971-03-271971-10-17
19721972-03-051972-10-11
19731973-04-241973-11-11
19741974-04-081974-10-22
19751975-05-021975-10-21
19761976-04-201976-10-16
19771977-04-061977-10-26
19781978-05-031978-10-18
19801980-04-091980-11-10
19821982-04-251982-10-23
19831983-05-071983-10-26
19841984-04-101984-10-13
19851985-04-021985-10-27
19861986-02-261986-10-29
19871987-04-081987-10-21
19881988-03-251988-11-06
19891989-02-251989-10-19
19901990-03-231990-11-11
19911991-04-041991-11-08
19921992-04-211992-10-21
19961996-02-071996-10-18
19981998-04-221998-09-28
20012001-04-262001-10-18
20032003-05-162003-10-22
20052005-04-132005-10-25
20062006-04-142006-11-09
20072007-03-122007-11-08
20082008-04-132008-10-31
20092009-04-192009-10-25
20102010-03-302010-11-05
20112011-04-012011-10-26
20122012-04-102012-11-08
20132013-03-152013-10-28
20142014-03-182014-10-31
20152015-03-162015-11-02
20162016-03-212016-10-28
20172017-03-132017-10-30
20182018-03-312018-10-30
20192019-04-082019-11-05
20202020-04-232020-11-04
20212021-03-302021-11-08
20222022-03-252022-10-22
20232023-04-102023-10-23
20242024-04-122024-10-27
20252025-03-252025-11-10
20262026-02-282026-10-12

Every Fixed Threshold

Fixed thresholds at Trona
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days961871950189
35 C (95 F): Days961381943151
40 C (104 F): Days9699202480
45 C (113 F): Days7726201713
90 F (32.2 C): Days961661950172
100 F (37.8 C): Days961192024108
110 F (43.3 C): Days9342201730
0 C (32 F): Ice days (max3319841
0 C (32 F): Frost days (min908219225
-10 C (14 F): Days with min18519301
20 C (68 F): Tropical nights (min93152200179
25 C (77 F): Days with min9386199839
10 mm (0.39 in): Days with 10 mm or more rain83920233
25 mm (0.98 in): Days with 25 mm or more rain40320253
50 mm (1.97 in): Days with 50 mm or more rain2119841
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 1920.

Download the Data

  • Data for Trona 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).