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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Covina Threshold Days by Year (USC00042088)

11 fixed thresholds counted per year at Covina (USC00042088): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Covina Thresholds

  • Covina: days with a maximum temperature at or above 30 C (86 F) in 12 years, most in 1922 with 107.
  • Covina: days with a maximum temperature at or above 35 C (95 F) in 12 years, most in 1947 with 33.
  • Covina: days with a maximum temperature at or above 90 F (32.2 C) in 12 years, most in 1947 with 65.
  • Covina: days with 10 mm (0.39 in) or more of precipitation in 12 years, most in 1943 with 18.
  • 11 fixed thresholds have at least one qualifying day at Covina.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Covina Days per year at Covina with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 107 in 1922. 0501001501922: 1071923: 721924: 971925: 641926: 691927: 631943: 971944: 541945: 841946: 1021947: 971948: 85192219241926194319451947
Days per year at Covina with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 107 in 1922.
Days at or above 30 C (86 F) per year at Covina
YearDaysDecade average
192210778.7
19237278.7
19249778.7
19256478.7
19266978.7
19276378.7
19439786.5
19445486.5
19458486.5
194610286.5
19479786.5
19488586.5
First to last qualifying date each year at Covina For each year, a bar from the first to the last day at Covina meeting 30 C (86 F). 1922: 19 April 1922 to 25 October 19221923: 8 January 1923 to 20 October 19231924: 12 February 1924 to 29 November 19241925: 27 February 1925 to 1 October 19251926: 26 February 1926 to 8 November 19261927: 21 April 1927 to 20 October 19271943: 12 February 1943 to 15 November 19431944: 19 January 1944 to 27 October 19441945: 16 May 1945 to 30 December 19451946: 1 March 1946 to 27 November 19461947: 4 February 1947 to 27 December 19471948: 16 January 1948 to 9 December 1948192219241926194319451947JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Covina meeting 30 C (86 F).
First to last qualifying date each year at Covina
YearFirst dateLast date
19221922-04-191922-10-25
19231923-01-081923-10-20
19241924-02-121924-11-29
19251925-02-271925-10-01
19261926-02-261926-11-08
19271927-04-211927-10-20
19431943-02-121943-11-15
19441944-01-191944-10-27
19451945-05-161945-12-30
19461946-03-011946-11-27
19471947-02-041947-12-27
19481948-01-161948-12-09

Every Fixed Threshold

Fixed thresholds at Covina
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days12107192285
35 C (95 F): Days1233194714
40 C (104 F): Days7419441
90 F (32.2 C): Days1265194739
100 F (37.8 C): Days111019476
0 C (32 F): Frost days (min111819248
20 C (68 F): Tropical nights (min8619453
10 mm (0.39 in): Days with 10 mm or more rain1218194311
25 mm (0.98 in): Days with 25 mm or more rain121019433
50 mm (1.97 in): Days with 50 mm or more rain8419271
100 mm (3.94 in): Days with 100 mm or more rain3219431

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1922.

Download the Data

  • Data for Covina 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).