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Built 2026-10-15 (15 October 2026)

Round Mountain Oregon Weather Records (USR0000OROU)

Record envelope, standing records and threshold days for Round Mountain Oregon (USR0000OROU), Oregon, United States, with 34 years of record.

Key Facts for Round Mountain Oregon

  • Round Mountain Oregon (USR0000OROU) is a weather station in Oregon, United States at 43.76 latitude and -121.72 longitude, 1,798 m (5,900 ft) above sea level.
  • The station reports from 1990 to 2023, 34 years of record.
  • 1,464 records set at Round Mountain Oregon still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Round Mountain Oregon set a daily record high minimum temperature of 14.4 C (57.9 F) on 7 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Oregon, United States, 43.76 latitude, -121.72 longitude.
  • Elevation: 1,798 m (5,900 ft).
  • Period of record: 1990 to 2023, 34 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

29 days at or beyond a record
Daily record high and record low at Round Mountain Oregon, with 2026 drawn through them The band shows the record high and record low for each calendar day at Round Mountain Oregon. The lines show the 2026 daily maximum and minimum. 29 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Round Mountain Oregon. The lines show the 2026 daily maximum and minimum. 29 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Round Mountain Oregon, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan25.0 C (77.0 F)-20.6 C (-5.1 F)16.7 C (62.1 F)-11.7 C (10.9 F)
Feb19.4 C (66.9 F)-22.2 C (-8.0 F)16.1 C (61.0 F)-10.0 C (14.0 F)
Mar21.1 C (70.0 F)-15.0 C (5.0 F)20.6 C (69.1 F)-7.8 C (18.0 F)
Apr25.0 C (77.0 F)-10.6 C (12.9 F)20.0 C (68.0 F)-7.8 C (18.0 F)
May32.8 C (91.0 F)-8.3 C (17.1 F)27.2 C (81.0 F)-4.4 C (24.1 F)
Jun36.6 C (97.9 F)-5.0 C (23.0 F)30.0 C (86.0 F)-2.2 C (28.0 F)
Jul36.7 C (98.1 F)-1.1 C (30.0 F)30.6 C (87.1 F)1.1 C (34.0 F)
Aug35.6 C (96.1 F)-1.8 C (28.8 F)32.8 C (91.0 F)3.9 C (39.0 F)
Sep33.9 C (93.0 F)-5.6 C (21.9 F)26.7 C (80.1 F)0.6 C (33.1 F)
Oct28.1 C (82.6 F)-15.6 C (3.9 F)28.3 C (82.9 F)-3.9 C (25.0 F)
Nov20.6 C (69.1 F)-17.1 C (1.2 F)n/an/a
Dec15.8 C (60.4 F)-24.9 C (-12.8 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Round Mountain Oregon by the year they were set 1,464 records at Round Mountain Oregon still stand. 2008 holds the most, with 67. 0204060801990: 361991: 411992: 211993: 651994: 481995: 441996: 441997: 231998: 301999: 562000: 322001: 432002: 502003: 382004: 222005: 362006: 352007: 302008: 672009: 462010: 312011: 282012: 392013: 362014: 382015: 492016: 412017: 492018: 222019: 412020: 372021: 372022: 602023: 472024: 302025: 402026: 321990199419982002200620102014201820222026
1,464 records at Round Mountain Oregon still stand. 2008 holds the most, with 67.
Standing records at Round Mountain Oregon by the year they were set
Year setStanding records
199036
199141
199221
199365
199448
199544
199644
199723
199830
199956
200032
200143
200250
200338
200422
200536
200635
200730
200867
200946
201031
201128
201239
201336
201438
201549
201641
201749
201822
201941
202037
202137
202260
202347
202430
202540
202632

All-Time Record Progression

2 new records
When Round Mountain Oregon set new all-time records 2 all-time records were set at Round Mountain Oregon between 28 June 2021 and 29 July 2022. Each dot is a new record. Record high minimum temperature28 June 2021: Record high minimum temperature 21.8 C (71.2 F)29 July 2022: Record high minimum temperature 22.8 C (73.0 F)
2 all-time records were set at Round Mountain Oregon between 28 June 2021 and 29 July 2022. Each dot is a new record.
When Round Mountain Oregon set new all-time records
DateKindDetail
2021-06-28Record high minimum temperatureRecord high minimum temperature 21.8 C (71.2 F)
2022-07-29Record high minimum temperatureRecord high minimum temperature 22.8 C (73.0 F)

Period of Record Coverage

1990 to 2026
Days with data per year at Round Mountain Oregon 37 years of record at Round Mountain Oregon, 1990 to 2026. 6 years have data for under 90 percent of days and are left out of rankings: 1990, 1992, 1993, 1996, 2013, 2026. 1990: 242 of 365 days1991: 352 of 365 days1992: 149 of 366 days1993: 328 of 365 days1994: 360 of 365 days1995: 354 of 365 days1996: 252 of 366 days1997: 360 of 365 days1998: 360 of 365 days1999: 364 of 365 days2000: 362 of 366 days2001: 364 of 365 days2002: 364 of 365 days2003: 363 of 365 days2004: 364 of 366 days2005: 365 of 365 days2006: 364 of 365 days2007: 362 of 365 days2008: 358 of 366 days2009: 362 of 365 days2010: 363 of 365 days2011: 363 of 365 days2012: 333 of 366 days2013: 217 of 365 days2014: 361 of 365 days2015: 361 of 365 days2016: 363 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 363 of 365 days2020: 364 of 366 days2021: 364 of 365 days2022: 365 of 365 days2023: 364 of 365 days2024: 353 of 366 days2025: 363 of 365 days2026: 283 of 365 days19901995200020052010201520202025
37 years of record at Round Mountain Oregon, 1990 to 2026. 6 years have data for under 90 percent of days and are left out of rankings: 1990, 1992, 1993, 1996, 2013, 2026.
Days with data per year at Round Mountain Oregon
YearDays with dataShare of yearComplete
199024266%No
199135296%Yes
199214941%No
199332890%No
199436099%Yes
199535497%Yes
199625269%No
199736099%Yes
199836099%Yes
1999364100%Yes
200036299%Yes
2001364100%Yes
2002364100%Yes
200336399%Yes
200436499%Yes
2005365100%Yes
2006364100%Yes
200736299%Yes
200835898%Yes
200936299%Yes
201036399%Yes
201136399%Yes
201233391%Yes
201321759%No
201436199%Yes
201536199%Yes
201636399%Yes
2017365100%Yes
2018365100%Yes
201936399%Yes
202036499%Yes
2021364100%Yes
2022365100%Yes
2023364100%Yes
202435396%Yes
202536399%Yes
202628378%No

Latest Records

20
Latest records at Round Mountain Oregon
DateStationRecordValueBeat old record byOld record stoodSignificance
7 October 2026Round Mountain Oregon, USdaily high min (Provisional)14.4 C (57.9 F)0.5 C (0.9 F)29 years12 of 100 (Routine)
7 October 2026Round Mountain Oregon, USmonthly high max (Tie, Provisional)28.3 C (82.9 F)tie0 years3 of 100 (Routine)
6 October 2026Round Mountain Oregon, USdaily high max (Provisional)26.7 C (80.1 F)1.1 C (2.0 F)4 years5 of 100 (Routine)
5 October 2026Round Mountain Oregon, USdaily high min (Tie, Provisional)14.4 C (57.9 F)tie12 years1 of 100 (Routine)
4 October 2026Round Mountain Oregon, USmonthly high max (Provisional)28.3 C (82.9 F)0.2 C (0.4 F)34 years23 of 100 (Routine)
4 October 2026Round Mountain Oregon, USdaily high min (Provisional)15.6 C (60.1 F)1.2 C (2.2 F)12 years8 of 100 (Routine)
3 October 2026Round Mountain Oregon, USdaily high max (Provisional)27.2 C (81.0 F)1.6 C (2.9 F)24 years12 of 100 (Routine)
6 September 2026Round Mountain Oregon, USdaily low max (Provisional)7.2 C (45.0 F)3.4 C (6.1 F)24 years15 of 100 (Routine)
21 August 2026Round Mountain Oregon, USdaily high min (Provisional)17.2 C (63.0 F)1.8 C (3.2 F)4 years8 of 100 (Routine)
20 August 2026Round Mountain Oregon, USdaily high max (Provisional)32.8 C (91.0 F)1.1 C (2.0 F)16 years10 of 100 (Routine)
20 August 2026Round Mountain Oregon, USdaily high min (Provisional)17.8 C (64.0 F)2.2 C (4.0 F)9 years10 of 100 (Routine)
6 August 2026Round Mountain Oregon, USdaily high max31.7 C (89.1 F)0.5 C (0.9 F)36 years13 of 100 (Routine)
6 August 2026Round Mountain Oregon, USdaily high min18.3 C (64.9 F)0.5 C (0.9 F)7 years6 of 100 (Routine)
5 August 2026Round Mountain Oregon, USdaily high max32.2 C (90.0 F)1.0 C (1.8 F)36 years14 of 100 (Routine)
14 July 2026Round Mountain Oregon, USdaily high max (Tie)30.0 C (86.0 F)tie36 years3 of 100 (Routine)
1 July 2026Round Mountain Oregon, USdaily low min1.1 C (34.0 F)1.1 C (2.0 F)28 years13 of 100 (Routine)
29 June 2026Round Mountain Oregon, USdaily low max9.4 C (48.9 F)1.4 C (2.5 F)35 years15 of 100 (Routine)
27 June 2026Round Mountain Oregon, USdaily low max7.8 C (46.0 F)1.6 C (2.9 F)29 years13 of 100 (Routine)
22 June 2026Round Mountain Oregon, USdaily high max (Tie)27.2 C (81.0 F)tie1 year0 of 100 (Routine)
18 June 2026Round Mountain Oregon, USdaily high min12.8 C (55.0 F)2.1 C (3.8 F)4 years8 of 100 (Routine)

Climate Trend

30 complete years, 1991 to 2025
Annual mean temperature at Round Mountain Oregon as warming stripes, 1991 to 2025 One stripe for each of 30 complete years at Round Mountain Oregon, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 6.3 C (43.3 F); red stripes are warmer. The coolest year was 2011, at 5.2 C (41.3 F), and the warmest was 2015, at 8.0 C (46.3 F). The strongest colour marks a difference of 1.8 C (3.2 F). 1991: 5.9 C, -0.3 C from the station mean1994: 6.0 C, -0.2 C from the station mean1995: 6.1 C, -0.2 C from the station mean1997: 5.6 C, -0.6 C from the station mean1998: 5.6 C, -0.7 C from the station mean1999: 5.4 C, -0.9 C from the station mean2000: 5.9 C, -0.4 C from the station mean2001: 6.3 C, +0.1 C from the station mean2002: 6.5 C, +0.2 C from the station mean2003: 6.6 C, +0.4 C from the station mean2004: 6.4 C, +0.1 C from the station mean2005: 6.2 C, 0.0 C from the station mean2006: 6.0 C, -0.2 C from the station mean2007: 6.2 C, -0.1 C from the station mean2008: 5.7 C, -0.6 C from the station mean2009: 6.2 C, -0.1 C from the station mean2010: 5.4 C, -0.9 C from the station mean2011: 5.2 C, -1.1 C from the station mean2014: 7.0 C, +0.7 C from the station mean2015: 8.0 C, +1.7 C from the station mean2016: 6.2 C, 0.0 C from the station mean2017: 6.2 C, -0.1 C from the station mean2018: 6.5 C, +0.2 C from the station mean2019: 5.7 C, -0.5 C from the station mean2020: 6.6 C, +0.3 C from the station mean2021: 6.7 C, +0.5 C from the station mean2022: 6.6 C, +0.3 C from the station mean2023: 6.3 C, 0.0 C from the station mean2024: 7.0 C, +0.7 C from the station mean2025: 7.6 C, +1.3 C from the station mean19911995200020052010201520202025
One stripe for each of 30 complete years at Round Mountain Oregon, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 6.3 C (43.3 F); red stripes are warmer. The coolest year was 2011, at 5.2 C (41.3 F), and the warmest was 2015, at 8.0 C (46.3 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Round Mountain Oregon as warming stripes, 1991 to 2025
YearAnnual mean temperatureDifference from the station mean
19915.9 C-0.31 C
19946.0 C-0.24 C
19956.1 C-0.16 C
19975.6 C-0.61 C
19985.6 C-0.69 C
19995.4 C-0.85 C
20005.9 C-0.35 C
20016.3 C+0.06 C
20026.5 C+0.23 C
20036.6 C+0.38 C
20046.4 C+0.15 C
20056.2 C-0.03 C
20066.0 C-0.21 C
20076.2 C-0.08 C
20085.7 C-0.56 C
20096.2 C-0.06 C
20105.4 C-0.87 C
20115.2 C-1.06 C
20147.0 C+0.70 C
20158.0 C+1.72 C
20166.2 C-0.01 C
20176.2 C-0.08 C
20186.5 C+0.23 C
20195.7 C-0.54 C
20206.6 C+0.34 C
20216.7 C+0.49 C
20226.6 C+0.32 C
20236.3 C+0.05 C
20247.0 C+0.71 C
20257.6 C+1.33 C

The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1991 to 2025. In Fahrenheit: 0.5 F (0.2 to 0.9) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Round Mountain Oregon
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.1 to 0.5) per decade0.5 F (0.2 to 0.9) per decade1991 to 202530Rise
Mean daily maximum0.3 C (0.1 to 0.6) per decade0.6 F (0.1 to 1.0) per decade1991 to 202530Rise
Mean daily minimum0.3 C (0.1 to 0.5) per decade0.5 F (0.2 to 0.9) per decade1991 to 202530Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1990 to 2026
Yearly extremes at Round Mountain Oregon: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)36.7 C (98.1 F)200232.2 C (90.0 F)37
Coldest night (TNn)-24.9 C (-12.8 F)1990-15.6 C (3.9 F)37

Hottest day (TXx)

Hottest day (TXx) at Round Mountain Oregon by year The hottest day of the year at Round Mountain Oregon, 1990 to 2026. The record is 36.7 C (98.1 F) in 2002, marked on the chart; the median year is 32.2 C (90.0 F). 2527.53032.53537.51990200020102020Record: 36.7 C (98.1 F) in 2002
The hottest day of the year at Round Mountain Oregon, 1990 to 2026. The record is 36.7 C (98.1 F) in 2002, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Round Mountain Oregon by year
YearHottest day (TXx)
199031.9 C (89.4 F)
199131.9 C (89.4 F)
199228.1 C (82.6 F)
199327.3 C (81.1 F)
199432.8 C (91.0 F)
199531.1 C (88.0 F)
199632.8 C (91.0 F)
199730.6 C (87.1 F)
199833.3 C (91.9 F)
199931.1 C (88.0 F)
200031.7 C (89.1 F)
200133.3 C (91.9 F)
200236.7 C (98.1 F)
200334.4 C (93.9 F)
200431.7 C (89.1 F)
200531.7 C (89.1 F)
200631.7 C (89.1 F)
200732.8 C (91.0 F)
200835.6 C (96.1 F)
200932.8 C (91.0 F)
201032.2 C (90.0 F)
201129.4 C (84.9 F)
201230.6 C (87.1 F)
201331.1 C (88.0 F)
201431.1 C (88.0 F)
201532.8 C (91.0 F)
201631.1 C (88.0 F)
201733.9 C (93.0 F)
201834.4 C (93.9 F)
201932.2 C (90.0 F)
202032.8 C (91.0 F)
202136.6 C (97.9 F)
202234.2 C (93.6 F)
202333.9 C (93.0 F)
202434.4 C (93.9 F)
202532.2 C (90.0 F)
202632.8 C (91.0 F)

Coldest night (TNn)

Coldest night (TNn) at Round Mountain Oregon by year The coldest night of the year at Round Mountain Oregon, 1990 to 2026. The record is -24.9 C (-12.8 F) in 1990, marked on the chart; the median year is -15.6 C (3.9 F). -25-20-15-10-51990200020102020Record: -24.9 C (-12.8 F) in 1990
The coldest night of the year at Round Mountain Oregon, 1990 to 2026. The record is -24.9 C (-12.8 F) in 1990, marked on the chart; the median year is -15.6 C (3.9 F).
Coldest night (TNn) at Round Mountain Oregon by year
YearColdest night (TNn)
1990-24.9 C (-12.8 F)
1991-10.8 C (12.6 F)
1992-9.2 C (15.4 F)
1993-22.2 C (-8.0 F)
1994-17.8 C (0.0 F)
1995-17.8 C (0.0 F)
1996-8.9 C (16.0 F)
1997-18.9 C (-2.0 F)
1998-24.4 C (-11.9 F)
1999-14.4 C (6.1 F)
2000-12.2 C (10.0 F)
2001-12.2 C (10.0 F)
2002-15.6 C (3.9 F)
2003-13.3 C (8.1 F)
2004-11.1 C (12.0 F)
2005-15.0 C (5.0 F)
2006-20.0 C (-4.0 F)
2007-18.9 C (-2.0 F)
2008-21.1 C (-6.0 F)
2009-21.1 C (-6.0 F)
2010-14.4 C (6.1 F)
2011-19.4 C (-2.9 F)
2012-11.7 C (10.9 F)
2013-20.0 C (-4.0 F)
2014-19.4 C (-2.9 F)
2015-14.4 C (6.1 F)
2016-16.7 C (1.9 F)
2017-20.6 C (-5.1 F)
2018-14.4 C (6.1 F)
2019-15.6 C (3.9 F)
2020-12.8 C (9.0 F)
2021-13.3 C (8.1 F)
2022-19.6 C (-3.3 F)
2023-18.7 C (-1.7 F)
2024-9.4 C (15.1 F)
2025-17.2 C (1.0 F)
2026-11.7 C (10.9 F)

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

30 years with a frost

Across 30 years with a frost, the median last spring frost at Round Mountain Oregon falls on 17 June and the median first autumn frost on 27 September, which leaves a median of 100 days between them.

Fitted over all years, the growing season changes by +11.2 days per decade at this station.

Frost dates and growing season at Round Mountain Oregon
MeasureMedian, all yearsEarliest periodRecent period (1991 to 2025)Recent against earliestFitted trend
Last spring frost17 Junen/a17 Junen/a-1.3 days per decade
First autumn frost27 Septembern/a27 Septembern/a+9.9 days per decade
Growing days100 daysn/a100 daysn/a+11.2 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

  • Data for Round Mountain Oregon standing records by year: CSV or JSON. Field meanings are on the data page.
  • 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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