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Built 2026-10-19 (19 October 2026)

Rapid City WFO Threshold Days by Year (USC00396948)

18 fixed thresholds counted per year at Rapid City WFO (USC00396948): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rapid City WFO Thresholds

  • Rapid City WFO: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 2021 with 74.
  • Rapid City WFO: days with a maximum temperature at or above 90 F (32.2 C) in 31 years, most in 2012 with 49.
  • Rapid City WFO: days with a maximum temperature at or below 0 C (32 F) in 31 years, most in 1996 with 68.
  • Rapid City WFO: nights with a minimum temperature at or below 0 C (32 F) in 31 years, most in 2008 with 172.
  • 18 fixed thresholds have at least one qualifying day at Rapid City WFO.
31 years with a qualifying day
Days at or above 30 C (86 F) per year at Rapid City WFO Days per year at Rapid City WFO with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 74 in 2021. 0204060801996: 341997: 221998: 331999: 272000: 502001: 462002: 572003: 572004: 352005: 532006: 482007: 562008: 332009: 222010: 362011: 402012: 692013: 412014: 222015: 382016: 442017: 552018: 292019: 142020: 462021: 742022: 652023: 402024: 652025: 492026: 6919962000200420082012201620202024
Days per year at Rapid City WFO with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 74 in 2021.
Days at or above 30 C (86 F) per year at Rapid City WFO
YearDaysDecade average
19963429
19972229
19983329
19992729
20005045.7
20014645.7
20025745.7
20035745.7
20043545.7
20055345.7
20064845.7
20075645.7
20083345.7
20092245.7
20103638.8
20114038.8
20126938.8
20134138.8
20142238.8
20153838.8
20164438.8
20175538.8
20182938.8
20191438.8
20204658.3
20217458.3
20226558.3
20234058.3
20246558.3
20254958.3
20266958.3
First to last qualifying date each year at Rapid City WFO For each year, a bar from the first to the last day at Rapid City WFO meeting 30 C (86 F). 1996: 16 May 1996 to 5 September 19961997: 22 June 1997 to 2 October 19971998: 25 June 1998 to 18 September 19981999: 25 June 1999 to 6 September 19992000: 5 May 2000 to 18 September 20002001: 13 May 2001 to 5 September 20012002: 17 June 2002 to 16 September 20022003: 29 May 2003 to 9 October 20032004: 5 May 2004 to 19 September 20042005: 17 April 2005 to 1 October 20052006: 22 May 2006 to 13 September 20062007: 10 June 2007 to 1 October 20072008: 24 June 2008 to 25 September 20082009: 18 May 2009 to 15 September 20092010: 28 May 2010 to 7 October 20102011: 2 June 2011 to 4 October 20112012: 1 April 2012 to 15 September 20122013: 13 May 2013 to 22 September 20132014: 29 May 2014 to 26 September 20142015: 9 June 2015 to 11 October 20152016: 2 June 2016 to 11 September 20162017: 6 May 2017 to 13 September 20172018: 7 May 2018 to 2 October 20182019: 7 June 2019 to 17 September 20192020: 12 June 2020 to 24 September 20202021: 4 June 2021 to 5 October 20212022: 27 May 2022 to 29 September 20222023: 11 April 2023 to 18 September 20232024: 17 May 2024 to 16 October 20242025: 10 May 2025 to 3 October 20252026: 22 April 2026 to 10 October 202619962000200420082012201620202024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rapid City WFO meeting 30 C (86 F).
First to last qualifying date each year at Rapid City WFO
YearFirst dateLast date
19961996-05-161996-09-05
19971997-06-221997-10-02
19981998-06-251998-09-18
19991999-06-251999-09-06
20002000-05-052000-09-18
20012001-05-132001-09-05
20022002-06-172002-09-16
20032003-05-292003-10-09
20042004-05-052004-09-19
20052005-04-172005-10-01
20062006-05-222006-09-13
20072007-06-102007-10-01
20082008-06-242008-09-25
20092009-05-182009-09-15
20102010-05-282010-10-07
20112011-06-022011-10-04
20122012-04-012012-09-15
20132013-05-132013-09-22
20142014-05-292014-09-26
20152015-06-092015-10-11
20162016-06-022016-09-11
20172017-05-062017-09-13
20182018-05-072018-10-02
20192019-06-072019-09-17
20202020-06-122020-09-24
20212021-06-042021-10-05
20222022-05-272022-09-29
20232023-04-112023-09-18
20242024-05-172024-10-16
20252025-05-102025-10-03
20262026-04-222026-10-10

Every Fixed Threshold

Fixed thresholds at Rapid City WFO
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3174202169
35 C (95 F): Days3024202226
40 C (104 F): Days10320062
90 F (32.2 C): Days3149201251
100 F (37.8 C): Days249200711
110 F (43.3 C): Days10n/a1
0 C (32 F): Ice days (max3168199613
0 C (32 F): Frost days (min31172200874
-10 C (14 F): Days with min3175199620
-20 C (-4 F): Days with min303019965
-30 C (-22 F): Days with min2219961
20 C (68 F): Tropical nights (min3021201216
25 C (77 F): Days with min3120071
10 mm (0.39 in): Days with 10 mm or more rain312320196
25 mm (0.98 in): Days with 25 mm or more rain30720152
50 mm (1.97 in): Days with 50 mm or more rain9319971
10 cm (3.9 in): Days with 10 cm or more snowfall28820131
25 cm (9.8 in): Days with 25 cm or more snowfall10220011

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1996.

Download the Data

  • Data for Rapid City WFO 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 (2026-10-17).