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Built 2026-10-19 (19 October 2026)

Barstow Threshold Days by Year (USC00040519)

16 fixed thresholds counted per year at Barstow (USC00040519): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Barstow Thresholds

  • Barstow: days with a maximum temperature at or above 30 C (86 F) in 49 years, most in 1940 with 179.
  • Barstow: days with a maximum temperature at or above 35 C (95 F) in 49 years, most in 1946 with 121.
  • Barstow: days with a maximum temperature at or above 40 C (104 F) in 49 years, most in 1945 with 58.
  • Barstow: days with a maximum temperature at or above 90 F (32.2 C) in 49 years, most in 1946 with 156.
  • 16 fixed thresholds have at least one qualifying day at Barstow.
49 years with a qualifying day
Days at or above 30 C (86 F) per year at Barstow Days per year at Barstow with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 179 in 1940. 0501001502001903: 1571904: 1551908: 1361913: 1451914: 1431915: 1431916: 1221917: 1101918: 1351919: 1431920: 1351940: 1791941: 1391942: 1521943: 1611944: 1501945: 1561946: 1741947: 1651948: 1481949: 1621950: 1731951: 1471952: 1721954: 1741955: 1491956: 1471957: 1191958: 1631959: 1511960: 1631961: 1531962: 1511963: 1381964: 1591966: 1721967: 1541968: 1451969: 1491970: 1451971: 1371972: 1491973: 1561974: 1551975: 1471976: 1461977: 1481978: 1501979: 1581903191519201944194919551960196619711976
Days per year at Barstow with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 179 in 1940.
Days at or above 30 C (86 F) per year at Barstow
YearDaysDecade average
1903157149.3
1904155149.3
1908136149.3
1913145134.4
1914143134.4
1915143134.4
1916122134.4
1917110134.4
1918135134.4
1919143134.4
1920135135
1940179158.6
1941139158.6
1942152158.6
1943161158.6
1944150158.6
1945156158.6
1946174158.6
1947165158.6
1948148158.6
1949162158.6
1950173155
1951147155
1952172155
1954174155
1955149155
1956147155
1957119155
1958163155
1959151155
1960163153.8
1961153153.8
1962151153.8
1963138153.8
1964159153.8
1966172153.8
1967154153.8
1968145153.8
1969149153.8
1970145149.1
1971137149.1
1972149149.1
1973156149.1
1974155149.1
1975147149.1
1976146149.1
1977148149.1
1978150149.1
1979158149.1
First to last qualifying date each year at Barstow For each year, a bar from the first to the last day at Barstow meeting 30 C (86 F). 1903: 23 April 1903 to 27 October 19031904: 27 March 1904 to 25 October 19041908: 11 April 1908 to 14 October 19081913: 30 March 1913 to 12 November 19131914: 14 April 1914 to 26 October 19141915: 11 April 1915 to 1 November 19151916: 15 March 1916 to 20 October 19161917: 6 April 1917 to 13 October 19171918: 28 April 1918 to 24 October 19181919: 16 April 1919 to 26 September 19191920: 26 April 1920 to 4 October 19201940: 22 March 1940 to 23 October 19401941: 25 April 1941 to 17 October 19411942: 30 March 1942 to 26 October 19421943: 1 April 1943 to 17 October 19431944: 2 April 1944 to 26 October 19441945: 7 April 1945 to 23 October 19451946: 6 March 1946 to 7 November 19461947: 17 March 1947 to 28 October 19471948: 13 April 1948 to 10 October 19481949: 11 April 1949 to 6 November 19491950: 29 March 1950 to 8 November 19501951: 8 April 1951 to 20 October 19511952: 5 April 1952 to 28 October 19521954: 12 April 1954 to 22 October 19541955: 9 April 1955 to 5 November 19551956: 24 March 1956 to 17 October 19561957: 5 April 1957 to 9 October 19571958: 16 April 1958 to 19 October 19581959: 1 April 1959 to 27 October 19591960: 21 March 1960 to 21 October 19601961: 2 April 1961 to 19 October 19611962: 5 April 1962 to 28 October 19621963: 13 April 1963 to 10 October 19631964: 14 April 1964 to 24 October 19641966: 29 March 1966 to 31 October 19661967: 7 May 1967 to 2 November 19671968: 29 March 1968 to 28 October 19681969: 28 March 1969 to 8 October 19691970: 10 April 1970 to 14 October 19701971: 29 March 1971 to 15 October 19711972: 6 March 1972 to 7 October 19721973: 25 April 1973 to 20 October 19731974: 30 April 1974 to 22 October 19741975: 9 May 1975 to 22 October 19751976: 20 April 1976 to 16 October 19761977: 7 April 1977 to 19 October 19771978: 3 May 1978 to 18 October 19781979: 15 April 1979 to 12 October 19791903191719431950195819661973JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Barstow meeting 30 C (86 F).
First to last qualifying date each year at Barstow
YearFirst dateLast date
19031903-04-231903-10-27
19041904-03-271904-10-25
19081908-04-111908-10-14
19131913-03-301913-11-12
19141914-04-141914-10-26
19151915-04-111915-11-01
19161916-03-151916-10-20
19171917-04-061917-10-13
19181918-04-281918-10-24
19191919-04-161919-09-26
19201920-04-261920-10-04
19401940-03-221940-10-23
19411941-04-251941-10-17
19421942-03-301942-10-26
19431943-04-011943-10-17
19441944-04-021944-10-26
19451945-04-071945-10-23
19461946-03-061946-11-07
19471947-03-171947-10-28
19481948-04-131948-10-10
19491949-04-111949-11-06
19501950-03-291950-11-08
19511951-04-081951-10-20
19521952-04-051952-10-28
19541954-04-121954-10-22
19551955-04-091955-11-05
19561956-03-241956-10-17
19571957-04-051957-10-09
19581958-04-161958-10-19
19591959-04-011959-10-27
19601960-03-211960-10-21
19611961-04-021961-10-19
19621962-04-051962-10-28
19631963-04-131963-10-10
19641964-04-141964-10-24
19661966-03-291966-10-31
19671967-05-071967-11-02
19681968-03-291968-10-28
19691969-03-281969-10-08
19701970-04-101970-10-14
19711971-03-291971-10-15
19721972-03-061972-10-07
19731973-04-251973-10-20
19741974-04-301974-10-22
19751975-05-091975-10-22
19761976-04-201976-10-16
19771977-04-071977-10-19
19781978-05-031978-10-18
19791979-04-151979-10-12

Every Fixed Threshold

Fixed thresholds at Barstow
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days491791940158
35 C (95 F): Days49121194696
40 C (104 F): Days4958194541
45 C (113 F): Days9419612
90 F (32.2 C): Days491561946143
100 F (37.8 C): Days4987196064
110 F (43.3 C): Days352019501
0 C (32 F): Ice days (max2119031
0 C (32 F): Frost days (min4996194947
-10 C (14 F): Days with min171019491
20 C (68 F): Tropical nights (min4953196121
25 C (77 F): Days with min251019591
10 mm (0.39 in): Days with 10 mm or more rain45919412
25 mm (0.98 in): Days with 25 mm or more rain16319181
10 cm (3.9 in): Days with 10 cm or more snowfall3319491
25 cm (9.8 in): Days with 25 cm or more snowfall1119671

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 Barstow 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).