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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Apex Threshold Days by Year (USC00310212)

15 fixed thresholds counted per year at Apex (USC00310212): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Apex Thresholds

  • Apex: days with 10 mm (0.39 in) or more of precipitation in 31 years, most in 2015 with 48.
  • Apex: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 2018 with 20.
  • Apex: days with 50 mm (1.97 in) or more of precipitation in 31 years, most in 2001 with 6.
  • Apex: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 2019 with 112.
  • 15 fixed thresholds have at least one qualifying day at Apex.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Apex Days per year at Apex with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 112 in 2019. 0501001501994: 591995: 551996: 591997: 691998: 871999: 642001: 712002: 912003: 582004: 602005: 622007: 852008: 782009: 712010: 982011: 1022012: 772013: 632014: 642015: 822016: 882017: 812018: 952019: 1122020: 752021: 782022: 872023: 802024: 792025: 661994199720012004200820112014201720202023
Days per year at Apex with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 112 in 2019.
Days at or above 30 C (86 F) per year at Apex
YearDaysDecade average
19945965.5
19955565.5
19965965.5
19976965.5
19988765.5
19996465.5
20017172
20029172
20035872
20046072
20056272
20078572
20087872
20097172
20109886.2
201110286.2
20127786.2
20136386.2
20146486.2
20158286.2
20168886.2
20178186.2
20189586.2
201911286.2
20207577.5
20217877.5
20228777.5
20238077.5
20247977.5
20256677.5
First to last qualifying date each year at Apex For each year, a bar from the first to the last day at Apex meeting 30 C (86 F). 1994: 27 April 1994 to 17 September 19941995: 20 April 1995 to 2 September 19951996: 5 May 1996 to 11 September 19961997: 19 May 1997 to 8 October 19971998: 17 May 1998 to 2 October 19981999: 5 April 1999 to 9 September 19992001: 8 April 2001 to 24 September 20012002: 17 April 2002 to 6 October 20022003: 9 May 2003 to 16 September 20032004: 24 April 2004 to 18 September 20042005: 13 May 2005 to 24 September 20052007: 26 April 2007 to 10 October 20072008: 19 April 2008 to 15 September 20082009: 25 April 2009 to 29 September 20092010: 3 April 2010 to 26 September 20102011: 25 April 2011 to 18 October 20112012: 2 May 2012 to 3 October 20122013: 11 April 2013 to 6 October 20132014: 3 April 2014 to 22 September 20142015: 12 May 2015 to 21 September 20152016: 20 April 2016 to 20 October 20162017: 22 April 2017 to 12 October 20172018: 3 May 2018 to 9 October 20182019: 25 April 2019 to 5 October 20192020: 29 March 2020 to 11 September 20202021: 5 May 2021 to 20 September 20212022: 27 April 2022 to 23 September 20222023: 21 April 2023 to 15 September 20232024: 3 April 2024 to 2 September 20242025: 5 April 2025 to 25 August 202519941998200320082012201620202024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Apex meeting 30 C (86 F).
First to last qualifying date each year at Apex
YearFirst dateLast date
19941994-04-271994-09-17
19951995-04-201995-09-02
19961996-05-051996-09-11
19971997-05-191997-10-08
19981998-05-171998-10-02
19991999-04-051999-09-09
20012001-04-082001-09-24
20022002-04-172002-10-06
20032003-05-092003-09-16
20042004-04-242004-09-18
20052005-05-132005-09-24
20072007-04-262007-10-10
20082008-04-192008-09-15
20092009-04-252009-09-29
20102010-04-032010-09-26
20112011-04-252011-10-18
20122012-05-022012-10-03
20132013-04-112013-10-06
20142014-04-032014-09-22
20152015-05-122015-09-21
20162016-04-202016-10-20
20172017-04-222017-10-12
20182018-05-032018-10-09
20192019-04-252019-10-05
20202020-03-292020-09-11
20212021-05-052021-09-20
20222022-04-272022-09-23
20232023-04-212023-09-15
20242024-04-032024-09-02
20252025-04-052025-08-25

Every Fixed Threshold

Fixed thresholds at Apex
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days30112201966
35 C (95 F): Days272619997
40 C (104 F): Days2119991
90 F (32.2 C): Days3064201936
100 F (37.8 C): Days8520111
0 C (32 F): Ice days (max231019963
0 C (32 F): Frost days (min3087199641
-10 C (14 F): Days with min13820182
20 C (68 F): Tropical nights (min3097201859
25 C (77 F): Days with min8320112
10 mm (0.39 in): Days with 10 mm or more rain3148201527
25 mm (0.98 in): Days with 25 mm or more rain312020187
50 mm (1.97 in): Days with 50 mm or more rain31620012
100 mm (3.94 in): Days with 100 mm or more rain11219991
10 cm (3.9 in): Days with 10 cm or more snowfall5220021

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1994.

Download the Data

  • Data for Apex 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).