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Built 2026-10-19 (19 October 2026)

Potter Valley Powerhouse Threshold Days by Year (USC00047109)

16 fixed thresholds counted per year at Potter Valley Powerhouse (USC00047109): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Potter Valley Powerhouse Thresholds

  • Potter Valley Powerhouse: days with 10 mm (0.39 in) or more of precipitation in 83 years, most in 1983 with 69.
  • Potter Valley Powerhouse: days with 25 mm (0.98 in) or more of precipitation in 83 years, most in 1983 with 33.
  • Potter Valley Powerhouse: days with 50 mm (1.97 in) or more of precipitation in 77 years, most in 1940 with 10.
  • Potter Valley Powerhouse: nights with a minimum temperature at or below 0 C (32 F) in 66 years, most in 1948 with 92.
  • 16 fixed thresholds have at least one qualifying day at Potter Valley Powerhouse.
58 years with a qualifying day
Days at or above 30 C (86 F) per year at Potter Valley Powerhouse Days per year at Potter Valley Powerhouse with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 131 in 2024. 0501001501938: 1031939: 1151940: 1111941: 901942: 1081943: 1131944: 1181945: 1241946: 991947: 1111948: 811949: 1301950: 1201951: 1261952: 1181953: 771969: 1101970: 1261971: 1051972: 1081974: 1201975: 1081976: 911977: 901978: 951979: 951980: 651981: 1051982: 881983: 681984: 921985: 931987: 961990: 811991: 1081993: 741994: 891995: 722003: 1182004: 1082005: 812006: 1172007: 872010: 1032011: 962013: 1002014: 1232015: 1302016: 1142018: 1062019: 1152020: 1282021: 1242022: 1182023: 1142024: 1312025: 1272026: 1301938194419501971197819841994200720162023
Days per year at Potter Valley Powerhouse with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 131 in 2024.
Days at or above 30 C (86 F) per year at Potter Valley Powerhouse
YearDaysDecade average
1938103109
1939115109
1940111108.5
194190108.5
1942108108.5
1943113108.5
1944118108.5
1945124108.5
194699108.5
1947111108.5
194881108.5
1949130108.5
1950120110.3
1951126110.3
1952118110.3
195377110.3
1969110110
1970126104.2
1971105104.2
1972108104.2
1974120104.2
1975108104.2
197691104.2
197790104.2
197895104.2
197995104.2
19806586.7
198110586.7
19828886.7
19836886.7
19849286.7
19859386.7
19879686.7
19908184.8
199110884.8
19937484.8
19948984.8
19957284.8
2003118102.2
2004108102.2
200581102.2
2006117102.2
200787102.2
2010103110.9
201196110.9
2013100110.9
2014123110.9
2015130110.9
2016114110.9
2018106110.9
2019115110.9
2020128124.6
2021124124.6
2022118124.6
2023114124.6
2024131124.6
2025127124.6
2026130124.6
First to last qualifying date each year at Potter Valley Powerhouse For each year, a bar from the first to the last day at Potter Valley Powerhouse meeting 30 C (86 F). 1938: 12 May 1938 to 22 September 19381939: 16 March 1939 to 30 October 19391940: 13 April 1940 to 19 October 19401941: 10 May 1941 to 17 October 19411942: 19 May 1942 to 24 October 19421943: 13 April 1943 to 15 October 19431944: 2 May 1944 to 27 October 19441945: 17 April 1945 to 3 November 19451946: 23 April 1946 to 25 October 19461947: 12 April 1947 to 12 October 19471948: 23 May 1948 to 9 October 19481949: 10 April 1949 to 4 November 19491950: 18 April 1950 to 3 November 19501951: 8 April 1951 to 8 October 19511952: 17 April 1952 to 14 October 19521953: 24 April 1953 to 9 October 19531969: 5 May 1969 to 1 October 19691970: 25 March 1970 to 11 October 19701971: 11 February 1971 to 14 October 19711972: 15 March 1972 to 6 October 19721974: 4 May 1974 to 19 October 19741975: 12 May 1975 to 20 October 19751976: 7 May 1976 to 4 November 19761977: 6 April 1977 to 14 October 19771978: 9 April 1978 to 23 October 19781979: 12 May 1979 to 5 October 19791980: 18 May 1980 to 9 October 19801981: 22 April 1981 to 18 October 19811982: 29 April 1982 to 13 October 19821983: 19 May 1983 to 11 October 19831984: 19 May 1984 to 28 September 19841985: 2 April 1985 to 5 October 19851987: 16 April 1987 to 8 October 19871990: 13 April 1990 to 24 October 19901991: 22 May 1991 to 21 October 19911993: 9 May 1993 to 27 October 19931994: 10 May 1994 to 3 October 19941995: 28 May 1995 to 4 October 19952003: 19 May 2003 to 29 October 20032004: 16 March 2004 to 6 October 20042005: 11 March 2005 to 18 October 20052006: 27 April 2006 to 20 October 20062007: 27 April 2007 to 26 September 20072010: 12 June 2010 to 20 October 20102011: 4 May 2011 to 15 October 20112013: 21 April 2013 to 20 September 20132014: 11 April 2014 to 14 October 20142015: 18 April 2015 to 23 October 20152016: 6 April 2016 to 10 October 20162018: 23 April 2018 to 21 October 20182019: 23 April 2019 to 12 November 20192020: 29 April 2020 to 3 November 20202021: 29 April 2021 to 5 October 20212022: 22 March 2022 to 21 October 20222023: 26 April 2023 to 20 October 20232024: 10 May 2024 to 20 October 20242025: 30 April 2025 to 8 October 20252026: 16 March 2026 to 10 October 202619381946196919781987200520162025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Potter Valley Powerhouse meeting 30 C (86 F).
First to last qualifying date each year at Potter Valley Powerhouse
YearFirst dateLast date
19381938-05-121938-09-22
19391939-03-161939-10-30
19401940-04-131940-10-19
19411941-05-101941-10-17
19421942-05-191942-10-24
19431943-04-131943-10-15
19441944-05-021944-10-27
19451945-04-171945-11-03
19461946-04-231946-10-25
19471947-04-121947-10-12
19481948-05-231948-10-09
19491949-04-101949-11-04
19501950-04-181950-11-03
19511951-04-081951-10-08
19521952-04-171952-10-14
19531953-04-241953-10-09
19691969-05-051969-10-01
19701970-03-251970-10-11
19711971-02-111971-10-14
19721972-03-151972-10-06
19741974-05-041974-10-19
19751975-05-121975-10-20
19761976-05-071976-11-04
19771977-04-061977-10-14
19781978-04-091978-10-23
19791979-05-121979-10-05
19801980-05-181980-10-09
19811981-04-221981-10-18
19821982-04-291982-10-13
19831983-05-191983-10-11
19841984-05-191984-09-28
19851985-04-021985-10-05
19871987-04-161987-10-08
19901990-04-131990-10-24
19911991-05-221991-10-21
19931993-05-091993-10-27
19941994-05-101994-10-03
19951995-05-281995-10-04
20032003-05-192003-10-29
20042004-03-162004-10-06
20052005-03-112005-10-18
20062006-04-272006-10-20
20072007-04-272007-09-26
20102010-06-122010-10-20
20112011-05-042011-10-15
20132013-04-212013-09-20
20142014-04-112014-10-14
20152015-04-182015-10-23
20162016-04-062016-10-10
20182018-04-232018-10-21
20192019-04-232019-11-12
20202020-04-292020-11-03
20212021-04-292021-10-05
20222022-03-222022-10-21
20232023-04-262023-10-20
20242024-05-102024-10-20
20252025-04-302025-10-08
20262026-03-162026-10-10

Every Fixed Threshold

Fixed thresholds at Potter Valley Powerhouse
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days581312024130
35 C (95 F): Days5884202154
40 C (104 F): Days532420216
45 C (113 F): Days4219782
90 F (32.2 C): Days581162021112
100 F (37.8 C): Days5857202117
110 F (43.3 C): Days10420214
0 C (32 F): Frost days (min669219482
-10 C (14 F): Days with min3319722
20 C (68 F): Tropical nights (min14320035
10 mm (0.39 in): Days with 10 mm or more rain8369198313
25 mm (0.98 in): Days with 25 mm or more rain833319834
50 mm (1.97 in): Days with 50 mm or more rain771019402
100 mm (3.94 in): Days with 100 mm or more rain25219951
200 mm (7.87 in): Days with 200 mm or more rain10n/a1
10 cm (3.9 in): Days with 10 cm or more snowfall2119691

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.

Download the Data

  • Data for Potter Valley Powerhouse 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).