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Data as of 2026-10-14
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Built 2026-10-16 (16 October 2026)

Round Mountain Oregon Threshold Days by Year

8 fixed thresholds counted per year at Round Mountain Oregon (USR0000OROU): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Round Mountain Oregon Thresholds

  • Round Mountain Oregon: days with a maximum temperature at or below 0 C (32 F) in 32 years, most in 1999 with 76.
  • Round Mountain Oregon: nights with a minimum temperature at or below 0 C (32 F) in 32 years, most in 2017 with 207.
  • Round Mountain Oregon: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 2024 with 19.
  • Round Mountain Oregon: nights with a minimum temperature at or below -10 C (14 F) in 31 years, most in 2008 with 24.
  • 8 fixed thresholds have at least one qualifying day at Round Mountain Oregon.
31 years with a qualifying day
Days at or above 30 C (86 F) per year at Round Mountain Oregon Days per year at Round Mountain Oregon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 19 in 2024. 051015201991: 11994: 51995: 21997: 11998: 161999: 32000: 32001: 82002: 132003: 162004: 62005: 62006: 122007: 102008: 82009: 132010: 42012: 32014: 62015: 112016: 42017: 132018: 62019: 32020: 82021: 142022: 122023: 52024: 192025: 92026: 1119911998200220062010201620202024
Days per year at Round Mountain Oregon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 19 in 2024.
Days at or above 30 C (86 F) per year at Round Mountain Oregon
YearDaysDecade average
199114.7
199454.7
199524.7
199714.7
1998164.7
199934.7
200039.5
200189.5
2002139.5
2003169.5
200469.5
200569.5
2006129.5
2007109.5
200889.5
2009139.5
201046.3
201236.3
201466.3
2015116.3
201646.3
2017136.3
201866.3
201936.3
2020811.1
20211411.1
20221211.1
2023511.1
20241911.1
2025911.1
20261111.1
First to last qualifying date each year at Round Mountain Oregon For each year, a bar from the first to the last day at Round Mountain Oregon meeting 30 C (86 F). 1991: 2 July 1991 to 2 July 19911994: 8 July 1994 to 13 August 19941995: 14 September 1995 to 15 September 19951997: 5 August 1997 to 5 August 19971998: 16 July 1998 to 4 September 19981999: 11 July 1999 to 26 August 19992000: 29 July 2000 to 3 August 20002001: 4 July 2001 to 11 September 20012002: 25 June 2002 to 13 September 20022003: 17 June 2003 to 3 September 20032004: 24 July 2004 to 13 August 20042005: 14 July 2005 to 21 August 20052006: 24 June 2006 to 2 September 20062007: 4 July 2007 to 30 August 20072008: 16 May 2008 to 15 September 20082009: 4 July 2009 to 23 September 20092010: 9 July 2010 to 25 August 20102012: 8 July 2012 to 17 August 20122014: 1 July 2014 to 10 August 20142015: 8 June 2015 to 11 September 20152016: 5 June 2016 to 18 August 20162017: 25 June 2017 to 5 September 20172018: 29 July 2018 to 14 August 20182019: 12 June 2019 to 28 August 20192020: 23 June 2020 to 6 September 20202021: 21 June 2021 to 7 September 20212022: 26 July 2022 to 6 September 20222023: 15 July 2023 to 16 August 20232024: 5 July 2024 to 6 September 20242025: 30 June 2025 to 2 September 20252026: 15 June 2026 to 20 August 202619911998200220062010201620202024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Round Mountain Oregon meeting 30 C (86 F).
First to last qualifying date each year at Round Mountain Oregon
YearFirst dateLast date
19911991-07-021991-07-02
19941994-07-081994-08-13
19951995-09-141995-09-15
19971997-08-051997-08-05
19981998-07-161998-09-04
19991999-07-111999-08-26
20002000-07-292000-08-03
20012001-07-042001-09-11
20022002-06-252002-09-13
20032003-06-172003-09-03
20042004-07-242004-08-13
20052005-07-142005-08-21
20062006-06-242006-09-02
20072007-07-042007-08-30
20082008-05-162008-09-15
20092009-07-042009-09-23
20102010-07-092010-08-25
20122012-07-082012-08-17
20142014-07-012014-08-10
20152015-06-082015-09-11
20162016-06-052016-08-18
20172017-06-252017-09-05
20182018-07-292018-08-14
20192019-06-122019-08-28
20202020-06-232020-09-06
20212021-06-212021-09-07
20222022-07-262022-09-06
20232023-07-152023-08-16
20242024-07-052024-09-06
20252025-06-302025-09-02
20262026-06-152026-08-20

Every Fixed Threshold

Fixed thresholds at Round Mountain Oregon
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3119202411
35 C (95 F): Days3220212
90 F (32.2 C): Days20920242
0 C (32 F): Ice days (max3276199916
0 C (32 F): Frost days (min32207201788
-10 C (14 F): Days with min312420082
-20 C (-4 F): Days with min5220062
20 C (68 F): Tropical nights (min11620222

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1991.

Download the Data

  • Data for Round Mountain Oregon 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-14).