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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

S Hero Threshold Days by Year

16 fixed thresholds counted per year at S Hero (USC00437607): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for S Hero Thresholds

  • S Hero: days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 2012 with 34.
  • S Hero: days with a maximum temperature at or below 0 C (32 F) in 50 years, most in 1978 with 82.
  • S Hero: days with 10 mm (0.39 in) or more of precipitation in 50 years, most in 1990 with 37.
  • S Hero: days with 25 mm (0.98 in) or more of precipitation in 50 years, most in 2010 with 11.
  • 16 fixed thresholds have at least one qualifying day at S Hero.
50 years with a qualifying day
Days at or above 30 C (86 F) per year at S Hero Days per year at S Hero with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 34 in 2012. 0102030401970: 131971: 91972: 31973: 111974: 71975: 221976: 61977: 151978: 181979: 221980: 161981: 111982: 91983: 181984: 171985: 91986: 71987: 161988: 321989: 151990: 171991: 291992: 81993: 221994: 101995: 271996: 61997: 191998: 91999: 322000: 32001: 232002: 242003: 162004: 22005: 262006: 112007: 212008: 122009: 82010: 322011: 222012: 342013: 192014: 192015: 252016: 342017: 162018: 302019: 221970197519801985199019952000200520102015
Days per year at S Hero with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 34 in 2012.
Days at or above 30 C (86 F) per year at S Hero
YearDaysDecade average
19701312.6
1971912.6
1972312.6
19731112.6
1974712.6
19752212.6
1976612.6
19771512.6
19781812.6
19792212.6
19801615
19811115
1982915
19831815
19841715
1985915
1986715
19871615
19883215
19891515
19901717.9
19912917.9
1992817.9
19932217.9
19941017.9
19952717.9
1996617.9
19971917.9
1998917.9
19993217.9
2000314.6
20012314.6
20022414.6
20031614.6
2004214.6
20052614.6
20061114.6
20072114.6
20081214.6
2009814.6
20103225.3
20112225.3
20123425.3
20131925.3
20141925.3
20152525.3
20163425.3
20171625.3
20183025.3
20192225.3
First to last qualifying date each year at S Hero For each year, a bar from the first to the last day at S Hero meeting 30 C (86 F). 1970: 10 June 1970 to 16 August 19701971: 19 May 1971 to 5 September 19711972: 15 July 1972 to 21 July 19721973: 11 June 1973 to 5 September 19731974: 10 June 1974 to 21 August 19741975: 20 May 1975 to 10 August 19751976: 18 April 1976 to 22 August 19761977: 17 May 1977 to 29 August 19771978: 27 May 1978 to 19 August 19781979: 9 May 1979 to 4 August 19791980: 14 June 1980 to 8 August 19801981: 16 June 1981 to 1 August 19811982: 8 July 1982 to 13 September 19821983: 13 June 1983 to 6 September 19831984: 8 June 1984 to 15 August 19841985: 6 July 1985 to 15 August 19851986: 29 May 1986 to 17 August 19861987: 30 May 1987 to 17 August 19871988: 12 June 1988 to 15 August 19881989: 18 May 1989 to 10 September 19891990: 27 April 1990 to 26 August 19901991: 24 May 1991 to 30 August 19911992: 21 May 1992 to 26 August 19921993: 13 June 1993 to 28 August 19931994: 15 June 1994 to 25 July 19941995: 31 May 1995 to 21 August 19951996: 18 July 1996 to 22 August 19961997: 10 June 1997 to 16 August 19971998: 15 May 1998 to 28 August 19981999: 31 May 1999 to 4 September 19992000: 26 June 2000 to 1 September 20002001: 3 May 2001 to 19 August 20012002: 17 April 2002 to 10 September 20022003: 23 June 2003 to 14 August 20032004: 21 July 2004 to 28 August 20042005: 3 June 2005 to 14 August 20052006: 19 June 2006 to 3 August 20062007: 11 May 2007 to 8 September 20072008: 7 June 2008 to 5 September 20082009: 28 July 2009 to 18 August 20092010: 24 May 2010 to 3 September 20102011: 31 May 2011 to 3 September 20112012: 20 May 2012 to 3 September 20122013: 7 May 2013 to 11 September 20132014: 8 June 2014 to 2 September 20142015: 7 May 2015 to 18 September 20152016: 27 May 2016 to 22 September 20162017: 17 May 2017 to 27 September 20172018: 30 May 2018 to 16 September 20182019: 27 June 2019 to 19 August 201919701977198419911998200520122019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at S Hero meeting 30 C (86 F).
First to last qualifying date each year at S Hero
YearFirst dateLast date
19701970-06-101970-08-16
19711971-05-191971-09-05
19721972-07-151972-07-21
19731973-06-111973-09-05
19741974-06-101974-08-21
19751975-05-201975-08-10
19761976-04-181976-08-22
19771977-05-171977-08-29
19781978-05-271978-08-19
19791979-05-091979-08-04
19801980-06-141980-08-08
19811981-06-161981-08-01
19821982-07-081982-09-13
19831983-06-131983-09-06
19841984-06-081984-08-15
19851985-07-061985-08-15
19861986-05-291986-08-17
19871987-05-301987-08-17
19881988-06-121988-08-15
19891989-05-181989-09-10
19901990-04-271990-08-26
19911991-05-241991-08-30
19921992-05-211992-08-26
19931993-06-131993-08-28
19941994-06-151994-07-25
19951995-05-311995-08-21
19961996-07-181996-08-22
19971997-06-101997-08-16
19981998-05-151998-08-28
19991999-05-311999-09-04
20002000-06-262000-09-01
20012001-05-032001-08-19
20022002-04-172002-09-10
20032003-06-232003-08-14
20042004-07-212004-08-28
20052005-06-032005-08-14
20062006-06-192006-08-03
20072007-05-112007-09-08
20082008-06-072008-09-05
20092009-07-282009-08-18
20102010-05-242010-09-03
20112011-05-312011-09-03
20122012-05-202012-09-03
20132013-05-072013-09-11
20142014-06-082014-09-02
20152015-05-072015-09-18
20162016-05-272016-09-22
20172017-05-172017-09-27
20182018-05-302018-09-16
20192019-06-272019-08-19

Every Fixed Threshold

Fixed thresholds at S Hero
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days5034201222
35 C (95 F): Days16620123
90 F (32.2 C): Days441919995
0 C (32 F): Ice days (max5082197868
0 C (32 F): Frost days (min461671972150
-10 C (14 F): Days with min4679198957
-20 C (-4 F): Days with min442519947
-30 C (-22 F): Days with min7219931
20 C (68 F): Tropical nights (min4627201816
25 C (77 F): Days with min4220181
10 mm (0.39 in): Days with 10 mm or more rain5037199034
25 mm (0.98 in): Days with 25 mm or more rain501120105
50 mm (1.97 in): Days with 50 mm or more rain18319961
100 mm (3.94 in): Days with 100 mm or more rain1120111
10 cm (3.9 in): Days with 10 cm or more snowfall46820174
25 cm (9.8 in): Days with 25 cm or more snowfall14219781

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1970.

Download the Data

  • Data for S Hero 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 2026-10-13 (13 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).