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

S Mtn Threshold Days by Year (USC00368308)

15 fixed thresholds counted per year at S Mtn (USC00368308): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for S Mtn Thresholds

  • S Mtn: days with 10 mm (0.39 in) or more of precipitation in 78 years, most in 2018 with 62.
  • S Mtn: days with 25 mm (0.98 in) or more of precipitation in 78 years, most in 1996 with 20.
  • S Mtn: days with 50 mm (1.97 in) or more of precipitation in 67 years, most in 1949 with 6.
  • S Mtn: days with 10 cm (3.9 in) or more of snowfall in 59 years, most in 1961 with 9.
  • 15 fixed thresholds have at least one qualifying day at S Mtn.
15 years with a qualifying day
Days at or above 30 C (86 F) per year at S Mtn Days per year at S Mtn with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 2010. 0102030402006: 142007: 192008: 102009: 62010: 322011: 242012: 162013: 82014: 42015: 112016: 172017: 62018: 132019: 172020: 2420062008201020122014201620182020
Days per year at S Mtn with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 2010.
Days at or above 30 C (86 F) per year at S Mtn
YearDaysDecade average
20061412.3
20071912.3
20081012.3
2009612.3
20103214.8
20112414.8
20121614.8
2013814.8
2014414.8
20151114.8
20161714.8
2017614.8
20181314.8
20191714.8
20202424
First to last qualifying date each year at S Mtn For each year, a bar from the first to the last day at S Mtn meeting 30 C (86 F). 2006: 30 May 2006 to 26 August 20062007: 1 June 2007 to 26 September 20072008: 7 June 2008 to 22 July 20082009: 27 April 2009 to 18 August 20092010: 7 April 2010 to 25 September 20102011: 31 May 2011 to 8 August 20112012: 11 June 2012 to 5 August 20122013: 7 July 2013 to 12 September 20132014: 19 June 2014 to 24 July 20142015: 12 June 2015 to 12 September 20152016: 12 June 2016 to 11 September 20162017: 18 May 2017 to 22 July 20172018: 4 May 2018 to 7 September 20182019: 27 June 2019 to 3 October 20192020: 5 June 2020 to 28 August 202020062008201020122014201620182020JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at S Mtn meeting 30 C (86 F).
First to last qualifying date each year at S Mtn
YearFirst dateLast date
20062006-05-302006-08-26
20072007-06-012007-09-26
20082008-06-072008-07-22
20092009-04-272009-08-18
20102010-04-072010-09-25
20112011-05-312011-08-08
20122012-06-112012-08-05
20132013-07-072013-09-12
20142014-06-192014-07-24
20152015-06-122015-09-12
20162016-06-122016-09-11
20172017-05-182017-07-22
20182018-05-042018-09-07
20192019-06-272019-10-03
20202020-06-052020-08-28

Every Fixed Threshold

Fixed thresholds at S Mtn
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1532201024
35 C (95 F): Days1220112
90 F (32.2 C): Days101220105
0 C (32 F): Ice days (max1554201414
0 C (32 F): Frost days (min151492014108
-10 C (14 F): Days with min1542201410
-20 C (-4 F): Days with min6820152
20 C (68 F): Tropical nights (min1522202022
10 mm (0.39 in): Days with 10 mm or more rain7862201835
25 mm (0.98 in): Days with 25 mm or more rain782019967
50 mm (1.97 in): Days with 50 mm or more rain67619492
100 mm (3.94 in): Days with 100 mm or more rain15219521
10 cm (3.9 in): Days with 10 cm or more snowfall59919611
25 cm (9.8 in): Days with 25 cm or more snowfall24319611
50 cm (19.7 in): Days with 50 cm or more snowfall7119711

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2006.

Download the Data

  • Data for S Mtn 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).