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Built 2026-10-19 (19 October 2026)

New Melones Dam HQ Threshold Days by Year (USC00046174)

14 fixed thresholds counted per year at New Melones Dam HQ (USC00046174): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for New Melones Dam HQ Thresholds

  • New Melones Dam HQ: days with a maximum temperature at or above 30 C (86 F) in 34 years, most in 2022 with 139.
  • New Melones Dam HQ: days with a maximum temperature at or above 35 C (95 F) in 34 years, most in 2008 with 84.
  • New Melones Dam HQ: days with a maximum temperature at or above 90 F (32.2 C) in 34 years, most in 2014 with 116.
  • New Melones Dam HQ: days with a maximum temperature at or above 100 F (37.8 C) in 34 years, most in 2024 with 57.
  • 14 fixed thresholds have at least one qualifying day at New Melones Dam HQ.
34 years with a qualifying day
Days at or above 30 C (86 F) per year at New Melones Dam HQ Days per year at New Melones Dam HQ with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 139 in 2022. 0501001501993: 1101994: 1141995: 1101996: 1221997: 1291998: 831999: 1162000: 1092001: 1322002: 1222003: 1372004: 1272005: 1032006: 962007: 1222008: 1312009: 1192010: 1132011: 1092012: 1312013: 1232014: 1282015: 1202016: 1222017: 1212018: 1092019: 1092020: 1332021: 1262022: 1392023: 1052024: 1342025: 1242026: 125199319972001200520092013201720212025
Days per year at New Melones Dam HQ with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 139 in 2022.
Days at or above 30 C (86 F) per year at New Melones Dam HQ
YearDaysDecade average
1993110112
1994114112
1995110112
1996122112
1997129112
199883112
1999116112
2000109119.8
2001132119.8
2002122119.8
2003137119.8
2004127119.8
2005103119.8
200696119.8
2007122119.8
2008131119.8
2009119119.8
2010113118.5
2011109118.5
2012131118.5
2013123118.5
2014128118.5
2015120118.5
2016122118.5
2017121118.5
2018109118.5
2019109118.5
2020133126.6
2021126126.6
2022139126.6
2023105126.6
2024134126.6
2025124126.6
2026125126.6
First to last qualifying date each year at New Melones Dam HQ For each year, a bar from the first to the last day at New Melones Dam HQ meeting 30 C (86 F). 1993: 10 May 1993 to 31 October 19931994: 16 April 1994 to 10 October 19941995: 29 May 1995 to 21 October 19951996: 30 April 1996 to 10 October 19961997: 27 April 1997 to 19 October 19971998: 30 April 1998 to 18 September 19981999: 23 May 1999 to 22 October 19992000: 20 May 2000 to 7 October 20002001: 26 April 2001 to 20 October 20012002: 13 May 2002 to 15 October 20022003: 21 May 2003 to 29 October 20032004: 26 April 2004 to 16 October 20042005: 23 May 2005 to 23 October 20052006: 2 May 2006 to 24 October 20062007: 29 April 2007 to 25 October 20072008: 13 April 2008 to 30 October 20082009: 20 April 2009 to 29 September 20092010: 31 May 2010 to 6 November 20102011: 5 May 2011 to 24 October 20112012: 22 April 2012 to 7 November 20122013: 28 April 2013 to 23 October 20132014: 1 May 2014 to 15 October 20142015: 29 April 2015 to 17 October 20152016: 7 April 2016 to 11 October 20162017: 4 May 2017 to 29 October 20172018: 24 April 2018 to 22 October 20182019: 25 April 2019 to 26 October 20192020: 29 April 2020 to 22 October 20202021: 30 April 2021 to 6 October 20212022: 8 April 2022 to 22 October 20222023: 28 April 2023 to 21 October 20232024: 12 May 2024 to 16 October 20242025: 10 May 2025 to 22 October 20252026: 18 March 2026 to 10 October 20261993199820032008201320182023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at New Melones Dam HQ meeting 30 C (86 F).
First to last qualifying date each year at New Melones Dam HQ
YearFirst dateLast date
19931993-05-101993-10-31
19941994-04-161994-10-10
19951995-05-291995-10-21
19961996-04-301996-10-10
19971997-04-271997-10-19
19981998-04-301998-09-18
19991999-05-231999-10-22
20002000-05-202000-10-07
20012001-04-262001-10-20
20022002-05-132002-10-15
20032003-05-212003-10-29
20042004-04-262004-10-16
20052005-05-232005-10-23
20062006-05-022006-10-24
20072007-04-292007-10-25
20082008-04-132008-10-30
20092009-04-202009-09-29
20102010-05-312010-11-06
20112011-05-052011-10-24
20122012-04-222012-11-07
20132013-04-282013-10-23
20142014-05-012014-10-15
20152015-04-292015-10-17
20162016-04-072016-10-11
20172017-05-042017-10-29
20182018-04-242018-10-22
20192019-04-252019-10-26
20202020-04-292020-10-22
20212021-04-302021-10-06
20222022-04-082022-10-22
20232023-04-282023-10-21
20242024-05-122024-10-16
20252025-05-102025-10-22
20262026-03-182026-10-10

Every Fixed Threshold

Fixed thresholds at New Melones Dam HQ
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days341392022125
35 C (95 F): Days3484200868
40 C (104 F): Days332720172
45 C (113 F): Days3120061
90 F (32.2 C): Days34116201497
100 F (37.8 C): Days3457202424
110 F (43.3 C): Days13620246
0 C (32 F): Frost days (min312519934
20 C (68 F): Tropical nights (min3158201729
25 C (77 F): Days with min251220241
10 mm (0.39 in): Days with 10 mm or more rain3446199815
25 mm (0.98 in): Days with 25 mm or more rain341919965
50 mm (1.97 in): Days with 50 mm or more rain26420231
10 cm (3.9 in): Days with 10 cm or more snowfall1120061

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1993.

Download the Data

  • Data for New Melones Dam HQ 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).