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Built 2026-10-19 (19 October 2026)

Onion Mountain Lookout Oregon Threshold Days by Year (USR0000OONI)

8 fixed thresholds counted per year at Onion Mountain Lookout Oregon (USR0000OONI): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Onion Mountain Lookout Oregon Thresholds

  • Onion Mountain Lookout Oregon: days with a maximum temperature at or below 0 C (32 F) in 29 years, most in 2023 with 38.
  • Onion Mountain Lookout Oregon: nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 2010 with 141.
  • Onion Mountain Lookout Oregon: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1996 with 25.
  • Onion Mountain Lookout Oregon: days with a maximum temperature at or above 90 F (32.2 C) in 24 years, most in 1996 with 15.
  • 8 fixed thresholds have at least one qualifying day at Onion Mountain Lookout Oregon.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Onion Mountain Lookout Oregon Days per year at Onion Mountain Lookout Oregon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 25 in 1996. 01020301986: 121987: 151988: 131991: 91992: 131994: 61996: 251997: 51999: 112002: 182003: 252004: 82005: 182006: 172007: 52010: 112011: 32012: 82013: 82015: 152016: 92020: 102021: 182022: 172023: 72024: 212025: 142026: 71986199119962002200520102013202020232026
Days per year at Onion Mountain Lookout Oregon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 25 in 1996.
Days at or above 30 C (86 F) per year at Onion Mountain Lookout Oregon
YearDaysDecade average
19861213.3
19871513.3
19881313.3
1991911.5
19921311.5
1994611.5
19962511.5
1997511.5
19991111.5
20021815.2
20032515.2
2004815.2
20051815.2
20061715.2
2007515.2
2010119
201139
201289
201389
2015159
201699
20201013.4
20211813.4
20221713.4
2023713.4
20242113.4
20251413.4
2026713.4
First to last qualifying date each year at Onion Mountain Lookout Oregon For each year, a bar from the first to the last day at Onion Mountain Lookout Oregon meeting 30 C (86 F). 1986: 30 May 1986 to 6 September 19861987: 3 June 1987 to 6 October 19871988: 19 July 1988 to 5 September 19881991: 2 July 1991 to 10 October 19911992: 21 June 1992 to 27 August 19921994: 28 June 1994 to 27 September 19941996: 2 June 1996 to 8 October 19961997: 11 May 1997 to 14 August 19971999: 26 July 1999 to 21 September 19992002: 12 June 2002 to 22 September 20022003: 5 June 2003 to 28 September 20032004: 24 July 2004 to 14 August 20042005: 26 May 2005 to 27 August 20052006: 17 May 2006 to 3 September 20062007: 10 July 2007 to 11 September 20072010: 7 July 2010 to 30 September 20102011: 4 September 2011 to 11 September 20112012: 4 August 2012 to 1 October 20122013: 1 July 2013 to 14 September 20132015: 8 June 2015 to 11 September 20152016: 4 June 2016 to 26 September 20162020: 20 July 2020 to 7 September 20202021: 1 June 2021 to 13 August 20212022: 25 June 2022 to 10 September 20222023: 19 July 2023 to 15 September 20232024: 4 July 2024 to 24 September 20242025: 8 June 2025 to 4 September 20252026: 14 June 2026 to 20 August 20261986199219992005201120162023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Onion Mountain Lookout Oregon meeting 30 C (86 F).
First to last qualifying date each year at Onion Mountain Lookout Oregon
YearFirst dateLast date
19861986-05-301986-09-06
19871987-06-031987-10-06
19881988-07-191988-09-05
19911991-07-021991-10-10
19921992-06-211992-08-27
19941994-06-281994-09-27
19961996-06-021996-10-08
19971997-05-111997-08-14
19991999-07-261999-09-21
20022002-06-122002-09-22
20032003-06-052003-09-28
20042004-07-242004-08-14
20052005-05-262005-08-27
20062006-05-172006-09-03
20072007-07-102007-09-11
20102010-07-072010-09-30
20112011-09-042011-09-11
20122012-08-042012-10-01
20132013-07-012013-09-14
20152015-06-082015-09-11
20162016-06-042016-09-26
20202020-07-202020-09-07
20212021-06-012021-08-13
20222022-06-252022-09-10
20232023-07-192023-09-15
20242024-07-042024-09-24
20252025-06-082025-09-04
20262026-06-142026-08-20

Every Fixed Threshold

Fixed thresholds at Onion Mountain Lookout Oregon
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days282519967
35 C (95 F): Days10320031
90 F (32.2 C): Days241519963
0 C (32 F): Ice days (max293820234
0 C (32 F): Frost days (min29141201034
-10 C (14 F): Days with min4819891
20 C (68 F): Tropical nights (min211220226
25 C (77 F): Days with min1120231

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1986.

Download the Data

  • Data for Onion Mountain Lookout 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-17).