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Built 2026-10-19 (19 October 2026)

Pasco Tri Cities AP Threshold Days by Year (USW00024163)

16 fixed thresholds counted per year at Pasco Tri Cities AP (USW00024163): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Pasco Tri Cities AP Thresholds

  • Pasco Tri Cities AP: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 2023 with 99.
  • Pasco Tri Cities AP: days with a maximum temperature at or above 35 C (95 F) in 28 years, most in 2021 with 49.
  • Pasco Tri Cities AP: days with a maximum temperature at or above 90 F (32.2 C) in 28 years, most in 2023 with 74.
  • Pasco Tri Cities AP: days with a maximum temperature at or below 0 C (32 F) in 28 years, most in 2017 with 30.
  • 16 fixed thresholds have at least one qualifying day at Pasco Tri Cities AP.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Pasco Tri Cities AP Days per year at Pasco Tri Cities AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 2023. 02550751001998: 821999: 652000: 682001: 722002: 692003: 862004: 682005: 702006: 832007: 762008: 702009: 822010: 612011: 662012: 732013: 882014: 842015: 892016: 712017: 912018: 802019: 922020: 822021: 902022: 832023: 992024: 872025: 921998200120042007201020132016201920222025
Days per year at Pasco Tri Cities AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 2023.
Days at or above 30 C (86 F) per year at Pasco Tri Cities AP
YearDaysDecade average
19988273.5
19996573.5
20006874.4
20017274.4
20026974.4
20038674.4
20046874.4
20057074.4
20068374.4
20077674.4
20087074.4
20098274.4
20106179.5
20116679.5
20127379.5
20138879.5
20148479.5
20158979.5
20167179.5
20179179.5
20188079.5
20199279.5
20208288.8
20219088.8
20228388.8
20239988.8
20248788.8
20259288.8
First to last qualifying date each year at Pasco Tri Cities AP For each year, a bar from the first to the last day at Pasco Tri Cities AP meeting 30 C (86 F). 1998: 29 April 1998 to 17 September 19981999: 23 May 1999 to 23 September 19992000: 16 May 2000 to 18 September 20002001: 12 May 2001 to 24 September 20012002: 4 June 2002 to 19 September 20022003: 23 May 2003 to 21 October 20032004: 1 May 2004 to 27 September 20042005: 26 May 2005 to 8 September 20052006: 29 April 2006 to 29 September 20062007: 8 May 2007 to 14 September 20072008: 15 May 2008 to 18 September 20082009: 21 April 2009 to 26 September 20092010: 14 May 2010 to 28 September 20102011: 21 June 2011 to 24 September 20112012: 23 April 2012 to 20 September 20122013: 5 May 2013 to 15 September 20132014: 2 May 2014 to 7 October 20142015: 28 April 2015 to 10 October 20152016: 20 April 2016 to 27 September 20162017: 4 May 2017 to 12 September 20172018: 26 April 2018 to 7 September 20182019: 7 May 2019 to 13 September 20192020: 9 May 2020 to 6 October 20202021: 18 April 2021 to 26 September 20212022: 2 June 2022 to 10 October 20222023: 29 April 2023 to 17 September 20232024: 10 May 2024 to 25 September 20242025: 2 May 2025 to 25 September 20251998200220062010201420182022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Pasco Tri Cities AP meeting 30 C (86 F).
First to last qualifying date each year at Pasco Tri Cities AP
YearFirst dateLast date
19981998-04-291998-09-17
19991999-05-231999-09-23
20002000-05-162000-09-18
20012001-05-122001-09-24
20022002-06-042002-09-19
20032003-05-232003-10-21
20042004-05-012004-09-27
20052005-05-262005-09-08
20062006-04-292006-09-29
20072007-05-082007-09-14
20082008-05-152008-09-18
20092009-04-212009-09-26
20102010-05-142010-09-28
20112011-06-212011-09-24
20122012-04-232012-09-20
20132013-05-052013-09-15
20142014-05-022014-10-07
20152015-04-282015-10-10
20162016-04-202016-09-27
20172017-05-042017-09-12
20182018-04-262018-09-07
20192019-05-072019-09-13
20202020-05-092020-10-06
20212021-04-182021-09-26
20222022-06-022022-10-10
20232023-04-292023-09-17
20242024-05-102024-09-25
20252025-05-022025-09-25

Every Fixed Threshold

Fixed thresholds at Pasco Tri Cities AP
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2899202392
35 C (95 F): Days2849202133
40 C (104 F): Days251220151
45 C (113 F): Days1420214
90 F (32.2 C): Days2874202364
100 F (37.8 C): Days2727202210
110 F (43.3 C): Days6520212
0 C (32 F): Ice days (max283020178
0 C (32 F): Frost days (min281382013100
-10 C (14 F): Days with min271720087
-20 C (-4 F): Days with min7420171
20 C (68 F): Tropical nights (min261420214
25 C (77 F): Days with min4119981
10 mm (0.39 in): Days with 10 mm or more rain25520053
25 mm (0.98 in): Days with 25 mm or more rain1120111
10 cm (3.9 in): Days with 10 cm or more snowfall1120171

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1998.

Download the Data

  • Data for Pasco Tri Cities AP 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).