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Built 2026-10-19 (19 October 2026)

Oroville 1 N Threshold Days by Year (USC00046522)

15 fixed thresholds counted per year at Oroville 1 N (USC00046522): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Oroville 1 N Thresholds

  • Oroville 1 N: days with a maximum temperature at or above 30 C (86 F) in 52 years, most in 1949 with 140.
  • Oroville 1 N: days with a maximum temperature at or above 35 C (95 F) in 52 years, most in 1917 with 92.
  • Oroville 1 N: days with a maximum temperature at or above 90 F (32.2 C) in 52 years, most in 1932 with 122.
  • Oroville 1 N: days with a maximum temperature at or above 100 F (37.8 C) in 52 years, most in 1917 with 58.
  • 15 fixed thresholds have at least one qualifying day at Oroville 1 N.
52 years with a qualifying day
Days at or above 30 C (86 F) per year at Oroville 1 N Days per year at Oroville 1 N with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 140 in 1949. 0501001501894: 1091895: 951896: 1081904: 1191905: 1141906: 1111907: 981908: 1091909: 1291910: 1241911: 1031912: 981913: 1221914: 1011915: 1241916: 1081917: 1371918: 1101919: 1241920: 1081921: 1291922: 1251923: 1071924: 1321925: 1111926: 1341927: 1301928: 1311929: 1201930: 1141931: 1291932: 1361933: 1311934: 1321935: 1231936: 1271937: 1181938: 1161939: 1381940: 1321941: 1011942: 1191943: 1151944: 1241945: 1261946: 1341947: 1321948: 951949: 1401950: 1251951: 1201952: 124189419071913191919251931193719431949
Days per year at Oroville 1 N with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 140 in 1949.
Days at or above 30 C (86 F) per year at Oroville 1 N
YearDaysDecade average
1894109104
189595104
1896108104
1904119113.3
1905114113.3
1906111113.3
190798113.3
1908109113.3
1909129113.3
1910124115.1
1911103115.1
191298115.1
1913122115.1
1914101115.1
1915124115.1
1916108115.1
1917137115.1
1918110115.1
1919124115.1
1920108122.7
1921129122.7
1922125122.7
1923107122.7
1924132122.7
1925111122.7
1926134122.7
1927130122.7
1928131122.7
1929120122.7
1930114126.4
1931129126.4
1932136126.4
1933131126.4
1934132126.4
1935123126.4
1936127126.4
1937118126.4
1938116126.4
1939138126.4
1940132121.8
1941101121.8
1942119121.8
1943115121.8
1944124121.8
1945126121.8
1946134121.8
1947132121.8
194895121.8
1949140121.8
1950125123
1951120123
1952124123
First to last qualifying date each year at Oroville 1 N For each year, a bar from the first to the last day at Oroville 1 N meeting 30 C (86 F). 1894: 6 May 1894 to 12 November 18941895: 9 May 1895 to 12 October 18951896: 26 May 1896 to 23 October 18961904: 11 April 1904 to 4 October 19041905: 15 May 1905 to 10 October 19051906: 19 April 1906 to 27 October 19061907: 14 May 1907 to 15 October 19071908: 9 April 1908 to 8 October 19081909: 14 April 1909 to 16 October 19091910: 18 April 1910 to 18 October 19101911: 20 May 1911 to 18 October 19111912: 6 May 1912 to 3 October 19121913: 23 April 1913 to 25 October 19131914: 17 March 1914 to 15 October 19141915: 27 May 1915 to 29 October 19151916: 30 April 1916 to 29 September 19161917: 8 May 1917 to 26 October 19171918: 20 April 1918 to 19 October 19181919: 30 April 1919 to 16 October 19191920: 27 April 1920 to 5 October 19201921: 22 April 1921 to 8 November 19211922: 2 May 1922 to 25 October 19221923: 27 March 1923 to 26 October 19231924: 1 March 1924 to 4 October 19241925: 22 March 1925 to 27 October 19251926: 13 March 1926 to 3 November 19261927: 23 April 1927 to 23 October 19271928: 29 April 1928 to 19 October 19281929: 1 May 1929 to 3 November 19291930: 28 March 1930 to 11 November 19301931: 16 April 1931 to 3 November 19311932: 9 May 1932 to 27 October 19321933: 27 April 1933 to 25 October 19331934: 7 April 1934 to 27 October 19341935: 19 May 1935 to 10 October 19351936: 11 April 1936 to 18 November 19361937: 2 May 1937 to 25 October 19371938: 18 April 1938 to 12 October 19381939: 5 April 1939 to 31 October 19391940: 13 April 1940 to 20 October 19401941: 24 April 1941 to 18 October 19411942: 20 May 1942 to 24 October 19421943: 10 May 1943 to 15 October 19431944: 3 May 1944 to 28 October 19441945: 19 April 1945 to 15 October 19451946: 23 April 1946 to 25 October 19461947: 13 April 1947 to 6 October 19471948: 23 May 1948 to 18 October 19481949: 14 April 1949 to 5 November 19491950: 20 April 1950 to 16 October 19501951: 9 April 1951 to 24 September 19511952: 18 April 1952 to 22 October 195218941908191519221929193619431950JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Oroville 1 N meeting 30 C (86 F).
First to last qualifying date each year at Oroville 1 N
YearFirst dateLast date
18941894-05-061894-11-12
18951895-05-091895-10-12
18961896-05-261896-10-23
19041904-04-111904-10-04
19051905-05-151905-10-10
19061906-04-191906-10-27
19071907-05-141907-10-15
19081908-04-091908-10-08
19091909-04-141909-10-16
19101910-04-181910-10-18
19111911-05-201911-10-18
19121912-05-061912-10-03
19131913-04-231913-10-25
19141914-03-171914-10-15
19151915-05-271915-10-29
19161916-04-301916-09-29
19171917-05-081917-10-26
19181918-04-201918-10-19
19191919-04-301919-10-16
19201920-04-271920-10-05
19211921-04-221921-11-08
19221922-05-021922-10-25
19231923-03-271923-10-26
19241924-03-011924-10-04
19251925-03-221925-10-27
19261926-03-131926-11-03
19271927-04-231927-10-23
19281928-04-291928-10-19
19291929-05-011929-11-03
19301930-03-281930-11-11
19311931-04-161931-11-03
19321932-05-091932-10-27
19331933-04-271933-10-25
19341934-04-071934-10-27
19351935-05-191935-10-10
19361936-04-111936-11-18
19371937-05-021937-10-25
19381938-04-181938-10-12
19391939-04-051939-10-31
19401940-04-131940-10-20
19411941-04-241941-10-18
19421942-05-201942-10-24
19431943-05-101943-10-15
19441944-05-031944-10-28
19451945-04-191945-10-15
19461946-04-231946-10-25
19471947-04-131947-10-06
19481948-05-231948-10-18
19491949-04-141949-11-05
19501950-04-201950-10-16
19511951-04-091951-09-24
19521952-04-181952-10-22

Every Fixed Threshold

Fixed thresholds at Oroville 1 N
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days521401949124
35 C (95 F): Days5292191779
40 C (104 F): Days5134195014
45 C (113 F): Days9519505
90 F (32.2 C): Days521221932107
100 F (37.8 C): Days5258191738
110 F (43.3 C): Days361119311
0 C (32 F): Frost days (min5153192218
-10 C (14 F): Days with min1119321
20 C (68 F): Tropical nights (min508418966
25 C (77 F): Days with min141818961
10 mm (0.39 in): Days with 10 mm or more rain3840194033
25 mm (0.98 in): Days with 25 mm or more rain3818194012
50 mm (1.97 in): Days with 50 mm or more rain23719402
100 mm (3.94 in): Days with 100 mm or more rain4119131

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

  • Data for Oroville 1 N 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).