Daily records
Page built 2026-10-19
Data as of 2026-10-17
Search
Built 2026-10-19 (19 October 2026)

Rocky Boy Montana Threshold Days by Year (USR0000MROC)

11 fixed thresholds counted per year at Rocky Boy Montana (USR0000MROC): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rocky Boy Montana Thresholds

  • Rocky Boy Montana: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 2003 with 46.
  • Rocky Boy Montana: days with a maximum temperature at or above 90 F (32.2 C) in 30 years, most in 2003 with 31.
  • Rocky Boy Montana: days with a maximum temperature at or below 0 C (32 F) in 30 years, most in 1996 with 72.
  • Rocky Boy Montana: nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 2000 with 211.
  • 11 fixed thresholds have at least one qualifying day at Rocky Boy Montana.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Rocky Boy Montana Days per year at Rocky Boy Montana with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 46 in 2003. 02040601993: 61994: 291995: 101996: 271997: 191998: 371999: 222000: 332001: 392003: 462004: 172005: 342006: 362007: 342008: 192009: 252010: 132011: 342014: 172015: 262016: 142018: 242019: 172020: 252021: 442022: 452023: 272024: 312025: 172026: 311993199619992003200620092014201820212024
Days per year at Rocky Boy Montana with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 46 in 2003.
Days at or above 30 C (86 F) per year at Rocky Boy Montana
YearDaysDecade average
1993621.4
19942921.4
19951021.4
19962721.4
19971921.4
19983721.4
19992221.4
20003331.4
20013931.4
20034631.4
20041731.4
20053431.4
20063631.4
20073431.4
20081931.4
20092531.4
20101320.7
20113420.7
20141720.7
20152620.7
20161420.7
20182420.7
20191720.7
20202531.4
20214431.4
20224531.4
20232731.4
20243131.4
20251731.4
20263131.4
First to last qualifying date each year at Rocky Boy Montana For each year, a bar from the first to the last day at Rocky Boy Montana meeting 30 C (86 F). 1993: 11 May 1993 to 10 August 19931994: 20 June 1994 to 17 September 19941995: 8 July 1995 to 3 September 19951996: 7 June 1996 to 30 August 19961997: 4 June 1997 to 28 August 19971998: 8 July 1998 to 17 September 19981999: 18 June 1999 to 30 August 19992000: 5 June 2000 to 17 September 20002001: 12 May 2001 to 25 September 20012003: 25 May 2003 to 7 September 20032004: 10 July 2004 to 1 September 20042005: 20 June 2005 to 8 September 20052006: 18 May 2006 to 4 September 20062007: 22 June 2007 to 4 September 20072008: 29 June 2008 to 25 August 20082009: 25 June 2009 to 24 September 20092010: 29 June 2010 to 26 August 20102011: 28 June 2011 to 1 October 20112014: 3 July 2014 to 25 September 20142015: 8 June 2015 to 25 September 20152016: 7 June 2016 to 1 September 20162018: 9 June 2018 to 7 September 20182019: 13 July 2019 to 15 September 20192020: 12 June 2020 to 5 September 20202021: 2 June 2021 to 18 September 20212022: 17 June 2022 to 28 September 20222023: 30 June 2023 to 17 September 20232024: 23 June 2024 to 25 September 20242025: 31 May 2025 to 1 September 20252026: 13 May 2026 to 27 August 202619931997200120062010201620212025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rocky Boy Montana meeting 30 C (86 F).
First to last qualifying date each year at Rocky Boy Montana
YearFirst dateLast date
19931993-05-111993-08-10
19941994-06-201994-09-17
19951995-07-081995-09-03
19961996-06-071996-08-30
19971997-06-041997-08-28
19981998-07-081998-09-17
19991999-06-181999-08-30
20002000-06-052000-09-17
20012001-05-122001-09-25
20032003-05-252003-09-07
20042004-07-102004-09-01
20052005-06-202005-09-08
20062006-05-182006-09-04
20072007-06-222007-09-04
20082008-06-292008-08-25
20092009-06-252009-09-24
20102010-06-292010-08-26
20112011-06-282011-10-01
20142014-07-032014-09-25
20152015-06-082015-09-25
20162016-06-072016-09-01
20182018-06-092018-09-07
20192019-07-132019-09-15
20202020-06-122020-09-05
20212021-06-022021-09-18
20222022-06-172022-09-28
20232023-06-302023-09-17
20242024-06-232024-09-25
20252025-05-312025-09-01
20262026-05-132026-08-27

Every Fixed Threshold

Fixed thresholds at Rocky Boy Montana
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3046200331
35 C (95 F): Days221320034
90 F (32.2 C): Days3031200314
100 F (37.8 C): Days9220071
0 C (32 F): Ice days (max3072199616
0 C (32 F): Frost days (min292112000107
-10 C (14 F): Days with min2985201926
-20 C (-4 F): Days with min2953199610
-30 C (-22 F): Days with min241619961
-40 C (-40 F): Days with min1220242
20 C (68 F): Tropical nights (min7320213

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1993.

Download the Data

  • Data for Rocky Boy Montana 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).