Daily records
Page built 2026-10-19
Data as of 2026-10-17
Search
Built 2026-10-19 (19 October 2026)

Pomona Lake Threshold Days by Year (USC00146498)

17 fixed thresholds counted per year at Pomona Lake (USC00146498): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Pomona Lake Thresholds

  • Pomona Lake: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1993 with 44.
  • Pomona Lake: days with 25 mm (0.98 in) or more of precipitation in 58 years, most in 1973 with 19.
  • Pomona Lake: days with a maximum temperature at or above 30 C (86 F) in 53 years, most in 2018 with 106.
  • Pomona Lake: days with a maximum temperature at or above 90 F (32.2 C) in 53 years, most in 2018 with 81.
  • 17 fixed thresholds have at least one qualifying day at Pomona Lake.
53 years with a qualifying day
Days at or above 30 C (86 F) per year at Pomona Lake Days per year at Pomona Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 106 in 2018. 0501001501965: 601966: 601967: 451968: 591969: 501970: 741971: 661972: 631973: 671974: 611975: 771976: 751977: 581978: 851979: 651980: 911981: 581982: 571986: 771987: 771988: 911989: 621990: 771991: 921992: 441993: 611994: 771995: 711996: 571997: 621999: 652000: 832006: 762007: 752008: 532009: 392010: 802011: 922012: 972013: 762014: 722015: 672016: 812017: 652018: 1062019: 762020: 872021: 962022: 912023: 852024: 742025: 712026: 87196519711977198619921999201020162022
Days per year at Pomona Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 106 in 2018.
Days at or above 30 C (86 F) per year at Pomona Lake
YearDaysDecade average
19656054.8
19666054.8
19674554.8
19685954.8
19695054.8
19707469.1
19716669.1
19726369.1
19736769.1
19746169.1
19757769.1
19767569.1
19775869.1
19788569.1
19796569.1
19809173.3
19815873.3
19825773.3
19867773.3
19877773.3
19889173.3
19896273.3
19907767.3
19919267.3
19924467.3
19936167.3
19947767.3
19957167.3
19965767.3
19976267.3
19996567.3
20008365.2
20067665.2
20077565.2
20085365.2
20093965.2
20108081.2
20119281.2
20129781.2
20137681.2
20147281.2
20156781.2
20168181.2
20176581.2
201810681.2
20197681.2
20208784.4
20219684.4
20229184.4
20238584.4
20247484.4
20257184.4
20268784.4
First to last qualifying date each year at Pomona Lake For each year, a bar from the first to the last day at Pomona Lake meeting 30 C (86 F). 1965: 22 April 1965 to 11 October 19651966: 7 May 1966 to 15 October 19661967: 30 March 1967 to 5 October 19671968: 2 May 1968 to 31 October 19681969: 30 May 1969 to 4 October 19691970: 28 April 1970 to 22 September 19701971: 1 June 1971 to 13 October 19711972: 13 April 1972 to 12 October 19721973: 11 May 1973 to 9 October 19731974: 14 May 1974 to 19 September 19741975: 24 April 1975 to 14 October 19751976: 3 April 1976 to 4 October 19761977: 4 June 1977 to 27 September 19771978: 24 May 1978 to 22 October 19781979: 5 June 1979 to 22 October 19791980: 21 April 1980 to 10 October 19801981: 3 April 1981 to 6 October 19811982: 13 April 1982 to 6 October 19821986: 25 April 1986 to 29 September 19861987: 19 April 1987 to 16 September 19871988: 13 May 1988 to 18 October 19881989: 22 April 1989 to 15 October 19891990: 6 June 1990 to 6 October 19901991: 13 May 1991 to 24 October 19911992: 15 April 1992 to 14 October 19921993: 29 May 1993 to 23 September 19931994: 19 April 1994 to 1 October 19941995: 23 March 1995 to 13 October 19951996: 12 April 1996 to 12 September 19961997: 18 May 1997 to 4 October 19971999: 1 June 1999 to 16 October 19992000: 6 April 2000 to 4 October 20002006: 14 April 2006 to 9 November 20062007: 30 April 2007 to 6 October 20072008: 2 May 2008 to 29 September 20082009: 30 May 2009 to 28 September 20092010: 23 May 2010 to 17 October 20102011: 4 April 2011 to 10 October 20112012: 3 April 2012 to 13 September 20122013: 30 April 2013 to 5 October 20132014: 5 May 2014 to 27 October 20142015: 8 April 2015 to 12 October 20152016: 8 May 2016 to 18 October 20162017: 20 March 2017 to 15 October 20172018: 7 May 2018 to 6 October 20182019: 11 April 2019 to 3 October 20192020: 9 April 2020 to 23 October 20202021: 27 April 2021 to 13 October 20212022: 13 April 2022 to 22 October 20222023: 7 May 2023 to 24 October 20232024: 15 April 2024 to 29 October 20242025: 14 April 2025 to 16 October 20252026: 11 March 2026 to 14 October 202619651972197919891996200920162023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Pomona Lake meeting 30 C (86 F).
First to last qualifying date each year at Pomona Lake
YearFirst dateLast date
19651965-04-221965-10-11
19661966-05-071966-10-15
19671967-03-301967-10-05
19681968-05-021968-10-31
19691969-05-301969-10-04
19701970-04-281970-09-22
19711971-06-011971-10-13
19721972-04-131972-10-12
19731973-05-111973-10-09
19741974-05-141974-09-19
19751975-04-241975-10-14
19761976-04-031976-10-04
19771977-06-041977-09-27
19781978-05-241978-10-22
19791979-06-051979-10-22
19801980-04-211980-10-10
19811981-04-031981-10-06
19821982-04-131982-10-06
19861986-04-251986-09-29
19871987-04-191987-09-16
19881988-05-131988-10-18
19891989-04-221989-10-15
19901990-06-061990-10-06
19911991-05-131991-10-24
19921992-04-151992-10-14
19931993-05-291993-09-23
19941994-04-191994-10-01
19951995-03-231995-10-13
19961996-04-121996-09-12
19971997-05-181997-10-04
19991999-06-011999-10-16
20002000-04-062000-10-04
20062006-04-142006-11-09
20072007-04-302007-10-06
20082008-05-022008-09-29
20092009-05-302009-09-28
20102010-05-232010-10-17
20112011-04-042011-10-10
20122012-04-032012-09-13
20132013-04-302013-10-05
20142014-05-052014-10-27
20152015-04-082015-10-12
20162016-05-082016-10-18
20172017-03-202017-10-15
20182018-05-072018-10-06
20192019-04-112019-10-03
20202020-04-092020-10-23
20212021-04-272021-10-13
20222022-04-132022-10-22
20232023-05-072023-10-24
20242024-04-152024-10-29
20252025-04-142025-10-16
20262026-03-112026-10-14

Every Fixed Threshold

Fixed thresholds at Pomona Lake
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days53106201887
35 C (95 F): Days5153201224
40 C (104 F): Days92019804
90 F (32.2 C): Days5381201847
100 F (37.8 C): Days343020126
110 F (43.3 C): Days3119801
0 C (32 F): Ice days (max5356197811
0 C (32 F): Frost days (min48132197953
-10 C (14 F): Days with min4857197816
-20 C (-4 F): Days with min252119792
20 C (68 F): Tropical nights (min4869201876
25 C (77 F): Days with min321719808
10 mm (0.39 in): Days with 10 mm or more rain5844199332
25 mm (0.98 in): Days with 25 mm or more rain5819197315
50 mm (1.97 in): Days with 50 mm or more rain48719734
100 mm (3.94 in): Days with 100 mm or more rain6220072
10 cm (3.9 in): Days with 10 cm or more snowfall13219751

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.

Download the Data

  • Data for Pomona Lake 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).