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Built 2026-10-19 (19 October 2026)

Pacifica 4 SSE Threshold Days by Year (USC00046599)

10 fixed thresholds counted per year at Pacifica 4 SSE (USC00046599): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Pacifica 4 SSE Thresholds

  • Pacifica 4 SSE: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1998 with 42.
  • Pacifica 4 SSE: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1996 with 17.
  • Pacifica 4 SSE: days with a maximum temperature at or above 30 C (86 F) in 21 years, most in 1984 with 18.
  • Pacifica 4 SSE: days with 50 mm (1.97 in) or more of precipitation in 21 years, most in 1997 with 4.
  • 10 fixed thresholds have at least one qualifying day at Pacifica 4 SSE.
21 years with a qualifying day
Days at or above 30 C (86 F) per year at Pacifica 4 SSE Days per year at Pacifica 4 SSE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 18 in 1984. 051015201984: 181988: 81989: 101990: 101991: 61992: 31993: 71994: 11995: 81996: 51997: 61999: 22000: 62001: 62002: 82004: 82006: 22007: 12008: 142010: 72011: 11984199019931996200020042008
Days per year at Pacifica 4 SSE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 18 in 1984.
Days at or above 30 C (86 F) per year at Pacifica 4 SSE
YearDaysDecade average
19841812
1988812
19891012
1990105.3
199165.3
199235.3
199375.3
199415.3
199585.3
199655.3
199765.3
199925.3
200066.4
200166.4
200286.4
200486.4
200626.4
200716.4
2008146.4
201074
201114
First to last qualifying date each year at Pacifica 4 SSE For each year, a bar from the first to the last day at Pacifica 4 SSE meeting 30 C (86 F). 1984: 27 May 1984 to 28 September 19841988: 10 April 1988 to 29 September 19881989: 6 April 1989 to 8 October 19891990: 2 May 1990 to 3 October 19901991: 13 August 1991 to 20 October 19911992: 26 September 1992 to 7 October 19921993: 17 June 1993 to 27 August 19931994: 10 June 1994 to 10 June 19941995: 24 June 1995 to 19 September 19951996: 30 April 1996 to 8 October 19961997: 16 May 1997 to 28 September 19971999: 26 September 1999 to 28 September 19992000: 14 June 2000 to 20 September 20002001: 7 May 2001 to 14 October 20012002: 11 July 2002 to 7 October 20022004: 26 April 2004 to 13 October 20042006: 18 July 2006 to 22 July 20062007: 25 September 2007 to 25 September 20072008: 15 May 2008 to 24 October 20082010: 24 August 2010 to 14 October 20102011: 28 September 2011 to 28 September 20111984199019931996200020042008JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Pacifica 4 SSE meeting 30 C (86 F).
First to last qualifying date each year at Pacifica 4 SSE
YearFirst dateLast date
19841984-05-271984-09-28
19881988-04-101988-09-29
19891989-04-061989-10-08
19901990-05-021990-10-03
19911991-08-131991-10-20
19921992-09-261992-10-07
19931993-06-171993-08-27
19941994-06-101994-06-10
19951995-06-241995-09-19
19961996-04-301996-10-08
19971997-05-161997-09-28
19991999-09-261999-09-28
20002000-06-142000-09-20
20012001-05-072001-10-14
20022002-07-112002-10-07
20042004-04-262004-10-13
20062006-07-182006-07-22
20072007-09-252007-09-25
20082008-05-152008-10-24
20102010-08-242010-10-14
20112011-09-282011-09-28

Every Fixed Threshold

Fixed thresholds at Pacifica 4 SSE
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days211819841
35 C (95 F): Days9319881
90 F (32.2 C): Days17619882
100 F (37.8 C): Days1119881
0 C (32 F): Frost days (min6419904
20 C (68 F): Tropical nights (min15320081
10 mm (0.39 in): Days with 10 mm or more rain2642199838
25 mm (0.98 in): Days with 25 mm or more rain261719968
50 mm (1.97 in): Days with 50 mm or more rain21419972
100 mm (3.94 in): Days with 100 mm or more rain2119941

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1984.

Download the Data

  • Data for Pacifica 4 SSE 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).