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Built 2026-10-19 (19 October 2026)

Oracle Threshold Days by Year (USC00026116)

15 fixed thresholds counted per year at Oracle (USC00026116): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Oracle Thresholds

  • Oracle: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 1915 with 27.
  • Oracle: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1906 with 11.
  • Oracle: days with a maximum temperature at or above 30 C (86 F) in 34 years, most in 1937 with 135.
  • Oracle: days with a maximum temperature at or above 35 C (95 F) in 34 years, most in 1924 with 54.
  • 15 fixed thresholds have at least one qualifying day at Oracle.
34 years with a qualifying day
Days at or above 30 C (86 F) per year at Oracle Days per year at Oracle with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 135 in 1937. 0501001501893: 781894: 1001895: 1101896: 881898: 981899: 941900: 1101901: 1031902: 901903: 801904: 761906: 741913: 861914: 851915: 981916: 991917: 1121918: 1091919: 951924: 1291925: 1061926: 1131927: 1111930: 1031931: 1191935: 1131937: 1351938: 1291939: 1171940: 1211941: 971942: 1201943: 1101947: 116189318981902191319171925193119391943
Days per year at Oracle with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 135 in 1937.
Days at or above 30 C (86 F) per year at Oracle
YearDaysDecade average
18937894.7
189410094.7
189511094.7
18968894.7
18989894.7
18999494.7
190011088.8
190110388.8
19029088.8
19038088.8
19047688.8
19067488.8
19138697.7
19148597.7
19159897.7
19169997.7
191711297.7
191810997.7
19199597.7
1924129114.8
1925106114.8
1926113114.8
1927111114.8
1930103119.3
1931119119.3
1935113119.3
1937135119.3
1938129119.3
1939117119.3
1940121112.8
194197112.8
1942120112.8
1943110112.8
1947116112.8
First to last qualifying date each year at Oracle For each year, a bar from the first to the last day at Oracle meeting 30 C (86 F). 1893: 10 May 1893 to 26 September 18931894: 8 May 1894 to 4 October 18941895: 13 April 1895 to 17 September 18951896: 21 May 1896 to 17 September 18961898: 24 April 1898 to 14 October 18981899: 12 May 1899 to 30 September 18991900: 8 May 1900 to 14 October 19001901: 10 May 1901 to 4 October 19011902: 7 May 1902 to 12 September 19021903: 12 May 1903 to 5 September 19031904: 17 May 1904 to 5 October 19041906: 8 May 1906 to 2 October 19061913: 19 April 1913 to 21 September 19131914: 7 May 1914 to 18 September 19141915: 12 May 1915 to 10 October 19151916: 5 May 1916 to 5 November 19161917: 13 May 1917 to 15 October 19171918: 15 May 1918 to 12 October 19181919: 22 April 1919 to 22 September 19191924: 7 May 1924 to 30 September 19241925: 13 April 1925 to 4 October 19251926: 24 April 1926 to 27 October 19261927: 24 April 1927 to 24 October 19271930: 7 April 1930 to 21 October 19301931: 6 May 1931 to 25 October 19311935: 22 May 1935 to 15 October 19351937: 15 April 1937 to 27 October 19371938: 18 April 1938 to 14 October 19381939: 22 April 1939 to 30 September 19391940: 1 May 1940 to 4 October 19401941: 7 May 1941 to 27 September 19411942: 19 May 1942 to 6 October 19421943: 3 April 1943 to 16 October 19431947: 1 May 1947 to 4 October 19471893189919041916192519351941JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Oracle meeting 30 C (86 F).
First to last qualifying date each year at Oracle
YearFirst dateLast date
18931893-05-101893-09-26
18941894-05-081894-10-04
18951895-04-131895-09-17
18961896-05-211896-09-17
18981898-04-241898-10-14
18991899-05-121899-09-30
19001900-05-081900-10-14
19011901-05-101901-10-04
19021902-05-071902-09-12
19031903-05-121903-09-05
19041904-05-171904-10-05
19061906-05-081906-10-02
19131913-04-191913-09-21
19141914-05-071914-09-18
19151915-05-121915-10-10
19161916-05-051916-11-05
19171917-05-131917-10-15
19181918-05-151918-10-12
19191919-04-221919-09-22
19241924-05-071924-09-30
19251925-04-131925-10-04
19261926-04-241926-10-27
19271927-04-241927-10-24
19301930-04-071930-10-21
19311931-05-061931-10-25
19351935-05-221935-10-15
19371937-04-151937-10-27
19381938-04-181938-10-14
19391939-04-221939-09-30
19401940-05-011940-10-04
19411941-05-071941-09-27
19421942-05-191942-10-06
19431943-04-031943-10-16
19471947-05-011947-10-04

Every Fixed Threshold

Fixed thresholds at Oracle
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days341351937116
35 C (95 F): Days3454192436
40 C (104 F): Days6318961
90 F (32.2 C): Days34100192475
100 F (37.8 C): Days292019404
0 C (32 F): Ice days (max6219131
0 C (32 F): Frost days (min3288193729
-10 C (14 F): Days with min7619373
20 C (68 F): Tropical nights (min3272190459
25 C (77 F): Days with min18819042
10 mm (0.39 in): Days with 10 mm or more rain382719158
25 mm (0.98 in): Days with 25 mm or more rain361119064
50 mm (1.97 in): Days with 50 mm or more rain16219061
10 cm (3.9 in): Days with 10 cm or more snowfall28519131
25 cm (9.8 in): Days with 25 cm or more snowfall6119011

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

  • Data for Oracle 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).