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Built 2026-10-15 (15 October 2026)

Riddle Mountain Oregon Weather Records (USR0000ORID)

Record envelope, standing records and threshold days for Riddle Mountain Oregon (USR0000ORID), Oregon, United States, with 34 years of record.

Key Facts for Riddle Mountain Oregon

  • Riddle Mountain Oregon (USR0000ORID) is a weather station in Oregon, United States at 43.10 latitude and -118.50 longitude, 1,936 m (6,352 ft) above sea level.
  • The station reports from 1990 to 2023, 34 years of record.
  • 1,464 records set at Riddle Mountain Oregon still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Riddle Mountain Oregon set a daily record high maximum temperature of 27.2 C (81.0 F) on 8 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, 43.10 latitude, -118.50 longitude.
  • Elevation: 1,936 m (6,352 ft).
  • Period of record: 1990 to 2023, 34 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

30 days at or beyond a record
Daily record high and record low at Riddle Mountain Oregon, with 2026 drawn through them The band shows the record high and record low for each calendar day at Riddle Mountain Oregon. The lines show the 2026 daily maximum and minimum. 30 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 Riddle Mountain Oregon. The lines show the 2026 daily maximum and minimum. 30 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Riddle Mountain Oregon, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan17.8 C (64.0 F)-19.4 C (-2.9 F)15.0 C (59.0 F)-11.7 C (10.9 F)
Feb15.0 C (59.0 F)-18.3 C (-0.9 F)14.4 C (57.9 F)-10.6 C (12.9 F)
Mar23.9 C (75.0 F)-14.4 C (6.1 F)23.9 C (75.0 F)-7.2 C (19.0 F)
Apr26.1 C (79.0 F)-10.6 C (12.9 F)20.0 C (68.0 F)-8.9 C (16.0 F)
May30.6 C (87.1 F)-7.2 C (19.0 F)28.3 C (82.9 F)-3.3 C (26.1 F)
Jun33.3 C (91.9 F)-5.0 C (23.0 F)31.1 C (88.0 F)-1.7 C (28.9 F)
Jul37.2 C (99.0 F)0.6 C (33.1 F)33.3 C (91.9 F)5.0 C (41.0 F)
Aug35.6 C (96.1 F)-1.1 C (30.0 F)34.4 C (93.9 F)3.3 C (37.9 F)
Sep34.4 C (93.9 F)-5.6 C (21.9 F)26.1 C (79.0 F)0.6 C (33.1 F)
Oct28.9 C (84.0 F)-13.9 C (7.0 F)28.3 C (82.9 F)-3.3 C (26.1 F)
Nov20.6 C (69.1 F)-18.3 C (-0.9 F)n/an/a
Dec16.1 C (61.0 F)-31.1 C (-24.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Riddle Mountain Oregon by the year they were set 1,464 records at Riddle Mountain Oregon still stand. 1996 holds the most, with 68. 0204060801990: 401991: 401992: 531993: 511994: 531995: 331996: 681997: 281998: 191999: 522000: 312001: 432002: 502003: 442004: 392005: 282006: 402007: 362008: 652009: 392010: 332011: 182012: 272013: 432014: 232015: 592016: 382017: 422018: 202019: 332020: 412021: 352022: 562023: 402024: 312025: 442026: 291990199419982002200620102014201820222026
1,464 records at Riddle Mountain Oregon still stand. 1996 holds the most, with 68.
Standing records at Riddle Mountain Oregon by the year they were set
Year setStanding records
199040
199140
199253
199351
199453
199533
199668
199728
199819
199952
200031
200143
200250
200344
200439
200528
200640
200736
200865
200939
201033
201118
201227
201343
201423
201559
201638
201742
201820
201933
202041
202135
202256
202340
202431
202544
202629

Period of Record Coverage

1990 to 2026
Days with data per year at Riddle Mountain Oregon 37 years of record at Riddle Mountain Oregon, 1990 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1990, 2026. 1990: 146 of 365 days1991: 362 of 365 days1992: 364 of 366 days1993: 348 of 365 days1994: 347 of 365 days1995: 344 of 365 days1996: 365 of 366 days1997: 361 of 365 days1998: 361 of 365 days1999: 362 of 365 days2000: 364 of 366 days2001: 363 of 365 days2002: 363 of 365 days2003: 365 of 365 days2004: 364 of 366 days2005: 365 of 365 days2006: 364 of 365 days2007: 360 of 365 days2008: 359 of 366 days2009: 362 of 365 days2010: 360 of 365 days2011: 345 of 365 days2012: 363 of 366 days2013: 361 of 365 days2014: 361 of 365 days2015: 365 of 365 days2016: 364 of 366 days2017: 360 of 365 days2018: 356 of 365 days2019: 360 of 365 days2020: 362 of 366 days2021: 362 of 365 days2022: 357 of 365 days2023: 364 of 365 days2024: 360 of 366 days2025: 362 of 365 days2026: 284 of 365 days19901995200020052010201520202025
37 years of record at Riddle Mountain Oregon, 1990 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1990, 2026.
Days with data per year at Riddle Mountain Oregon
YearDays with dataShare of yearComplete
199014640%No
199136299%Yes
199236499%Yes
199334895%Yes
199434795%Yes
199534494%Yes
1996365100%Yes
199736199%Yes
199836199%Yes
199936299%Yes
200036499%Yes
200136399%Yes
200236399%Yes
2003365100%Yes
200436499%Yes
2005365100%Yes
2006364100%Yes
200736099%Yes
200835998%Yes
200936299%Yes
201036099%Yes
201134595%Yes
201236399%Yes
201336199%Yes
201436199%Yes
2015365100%Yes
201636499%Yes
201736099%Yes
201835698%Yes
201936099%Yes
202036299%Yes
202136299%Yes
202235798%Yes
2023364100%Yes
202436098%Yes
202536299%Yes
202628478%No

Latest Records

20
Latest records at Riddle Mountain Oregon
DateStationRecordValueBeat old record byOld record stoodSignificance
8 October 2026Riddle Mountain Oregon, USdaily high max (Provisional)27.2 C (81.0 F)1.6 C (2.9 F)29 years13 of 100 (Routine)
8 October 2026Riddle Mountain Oregon, USdaily high min (Tie, Provisional)17.2 C (63.0 F)tie29 years2 of 100 (Routine)
7 October 2026Riddle Mountain Oregon, USdaily high min (Provisional)18.3 C (64.9 F)2.7 C (4.9 F)29 years15 of 100 (Routine)
7 October 2026Riddle Mountain Oregon, USdaily high max (Tie, Provisional)26.1 C (79.0 F)tie29 years2 of 100 (Routine)
6 October 2026Riddle Mountain Oregon, USdaily high min (Provisional)16.1 C (61.0 F)1.7 C (3.1 F)35 years16 of 100 (Routine)
6 October 2026Riddle Mountain Oregon, USdaily high max (Provisional)26.1 C (79.0 F)1.1 C (2.0 F)23 years10 of 100 (Routine)
5 October 2026Riddle Mountain Oregon, USdaily high max (Provisional)25.6 C (78.1 F)2.8 C (5.0 F)12 years10 of 100 (Routine)
5 October 2026Riddle Mountain Oregon, USdaily high min (Provisional)17.2 C (63.0 F)3.3 C (5.9 F)4 years9 of 100 (Routine)
4 October 2026Riddle Mountain Oregon, USdaily high max (Provisional)28.3 C (82.9 F)3.9 C (7.0 F)32 years18 of 100 (Routine)
4 October 2026Riddle Mountain Oregon, USmonthly high min (Provisional)19.4 C (66.9 F)0.5 C (0.9 F)16 years17 of 100 (Routine)
6 September 2026Riddle Mountain Oregon, USdaily low max (Provisional)10.6 C (51.1 F)0.5 C (0.9 F)33 years13 of 100 (Routine)
3 September 2026Riddle Mountain Oregon, USdaily low max (Provisional)8.3 C (46.9 F)3.9 C (7.0 F)25 years16 of 100 (Routine)
3 September 2026Riddle Mountain Oregon, USdaily low min (Tie, Provisional)0.6 C (33.1 F)tie21 years2 of 100 (Routine)
26 August 2026Riddle Mountain Oregon, USdaily high min (Tie, Provisional)18.9 C (66.0 F)tie27 years2 of 100 (Routine)
21 August 2026Riddle Mountain Oregon, USdaily high min (Provisional)20.6 C (69.1 F)2.8 C (5.0 F)20 years15 of 100 (Routine)
20 August 2026Riddle Mountain Oregon, USdaily high min (Tie, Provisional)19.4 C (66.9 F)tie16 years2 of 100 (Routine)
19 August 2026Riddle Mountain Oregon, USdaily high min (Tie, Provisional)18.3 C (64.9 F)tie16 years2 of 100 (Routine)
7 August 2026Riddle Mountain Oregon, USdaily high max34.4 C (93.9 F)1.1 C (2.0 F)13 years9 of 100 (Routine)
28 June 2026Riddle Mountain Oregon, USdaily low max10.6 C (51.1 F)2.7 C (4.9 F)35 years17 of 100 (Routine)
28 June 2026Riddle Mountain Oregon, USdaily low min0.6 C (33.1 F)1.1 C (2.0 F)5 years6 of 100 (Routine)

Climate Trend

32 complete years, 1991 to 2025
Annual mean temperature at Riddle Mountain Oregon as warming stripes, 1991 to 2025 One stripe for each of 32 complete years at Riddle Mountain Oregon, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 7.8 C (46.1 F); red stripes are warmer. The coolest year was 1993, at 6.3 C (43.3 F), and the warmest was 2015, at 9.1 C (48.3 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1991: 7.5 C, -0.4 C from the station mean1992: 8.7 C, +0.9 C from the station mean1993: 6.3 C, -1.6 C from the station mean1996: 7.4 C, -0.5 C from the station mean1997: 7.3 C, -0.5 C from the station mean1998: 6.9 C, -0.9 C from the station mean1999: 7.3 C, -0.5 C from the station mean2000: 7.7 C, -0.2 C from the station mean2001: 8.0 C, +0.1 C from the station mean2002: 7.7 C, -0.1 C from the station mean2003: 8.4 C, +0.6 C from the station mean2004: 8.0 C, +0.2 C from the station mean2005: 7.7 C, -0.2 C from the station mean2006: 7.7 C, -0.1 C from the station mean2007: 8.0 C, +0.1 C from the station mean2008: 7.3 C, -0.5 C from the station mean2009: 7.4 C, -0.4 C from the station mean2010: 7.1 C, -0.8 C from the station mean2012: 8.4 C, +0.5 C from the station mean2013: 8.2 C, +0.4 C from the station mean2014: 8.7 C, +0.9 C from the station mean2015: 9.1 C, +1.2 C from the station mean2016: 8.2 C, +0.3 C from the station mean2017: 8.2 C, +0.3 C from the station mean2018: 7.9 C, +0.1 C from the station mean2019: 6.9 C, -0.9 C from the station mean2020: 8.1 C, +0.2 C from the station mean2021: 8.4 C, +0.5 C from the station mean2022: 8.0 C, +0.2 C from the station mean2023: 7.5 C, -0.4 C from the station mean2024: 8.5 C, +0.7 C from the station mean2025: 8.8 C, +0.9 C from the station mean19911995200020052010201520202025
One stripe for each of 32 complete years at Riddle Mountain Oregon, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 7.8 C (46.1 F); red stripes are warmer. The coolest year was 1993, at 6.3 C (43.3 F), and the warmest was 2015, at 9.1 C (48.3 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Riddle Mountain Oregon as warming stripes, 1991 to 2025
YearAnnual mean temperatureDifference from the station mean
19917.5 C-0.39 C
19928.7 C+0.87 C
19936.3 C-1.60 C
19967.4 C-0.49 C
19977.3 C-0.53 C
19986.9 C-0.92 C
19997.3 C-0.52 C
20007.7 C-0.19 C
20018.0 C+0.13 C
20027.7 C-0.11 C
20038.4 C+0.55 C
20048.0 C+0.15 C
20057.7 C-0.20 C
20067.7 C-0.11 C
20078.0 C+0.12 C
20087.3 C-0.51 C
20097.4 C-0.42 C
20107.1 C-0.76 C
20128.4 C+0.51 C
20138.2 C+0.37 C
20148.7 C+0.89 C
20159.1 C+1.22 C
20168.2 C+0.32 C
20178.2 C+0.34 C
20187.9 C+0.08 C
20196.9 C-0.93 C
20208.1 C+0.20 C
20218.4 C+0.51 C
20228.0 C+0.17 C
20237.5 C-0.36 C
20248.5 C+0.65 C
20258.8 C+0.94 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 (0.1 to 0.9) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Riddle Mountain Oregon
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.1 to 0.5) per decade0.5 F (0.1 to 0.9) per decade1991 to 202532Rise
Mean daily maximum0.26 C (0.00 to 0.51) per decade0.46 F (0.01 to 0.92) per decade1991 to 202532Rise
Mean daily minimum0.3 C (0.1 to 0.5) per decade0.5 F (0.2 to 0.8) per decade1991 to 202532Rise

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 Riddle Mountain Oregon: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)37.2 C (99.0 F)200334.4 C (93.9 F)37
Coldest night (TNn)-31.1 C (-24.0 F)1990-14.4 C (6.1 F)37

Hottest day (TXx)

Hottest day (TXx) at Riddle Mountain Oregon by year The hottest day of the year at Riddle Mountain Oregon, 1990 to 2026. The record is 37.2 C (99.0 F) in 2003, marked on the chart; the median year is 34.4 C (93.9 F). 30323436381990200020102020Record: 37.2 C (99.0 F) in 2003
The hottest day of the year at Riddle Mountain Oregon, 1990 to 2026. The record is 37.2 C (99.0 F) in 2003, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Riddle Mountain Oregon by year
YearHottest day (TXx)
199034.4 C (93.9 F)
199132.2 C (90.0 F)
199233.3 C (91.9 F)
199331.7 C (89.1 F)
199432.8 C (91.0 F)
199531.7 C (89.1 F)
199634.4 C (93.9 F)
199731.7 C (89.1 F)
199834.4 C (93.9 F)
199932.2 C (90.0 F)
200034.4 C (93.9 F)
200134.4 C (93.9 F)
200236.7 C (98.1 F)
200337.2 C (99.0 F)
200433.9 C (93.0 F)
200533.9 C (93.0 F)
200634.4 C (93.9 F)
200734.4 C (93.9 F)
200833.3 C (91.9 F)
200934.4 C (93.9 F)
201033.3 C (91.9 F)
201132.2 C (90.0 F)
201233.9 C (93.0 F)
201336.1 C (97.0 F)
201433.3 C (91.9 F)
201534.4 C (93.9 F)
201632.8 C (91.0 F)
201734.4 C (93.9 F)
201835.6 C (96.1 F)
201932.2 C (90.0 F)
202035.6 C (96.1 F)
202134.1 C (93.4 F)
202236.1 C (97.0 F)
202334.4 C (93.9 F)
202435.6 C (96.1 F)
202532.8 C (91.0 F)
202634.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Riddle Mountain Oregon by year The coldest night of the year at Riddle Mountain Oregon, 1990 to 2026. The record is -31.1 C (-24.0 F) in 1990, marked on the chart; the median year is -14.4 C (6.1 F). -40-30-20-101990200020102020Record: -31.1 C (-24.0 F) in 1990
The coldest night of the year at Riddle Mountain Oregon, 1990 to 2026. The record is -31.1 C (-24.0 F) in 1990, marked on the chart; the median year is -14.4 C (6.1 F).
Coldest night (TNn) at Riddle Mountain Oregon by year
YearColdest night (TNn)
1990-31.1 C (-24.0 F)
1991-12.8 C (9.0 F)
1992-12.2 C (10.0 F)
1993-18.3 C (-0.9 F)
1994-12.8 C (9.0 F)
1995-10.0 C (14.0 F)
1996-15.6 C (3.9 F)
1997-19.4 C (-2.9 F)
1998-25.0 C (-13.0 F)
1999-11.7 C (10.9 F)
2000-10.0 C (14.0 F)
2001-14.4 C (6.1 F)
2002-14.4 C (6.1 F)
2003-13.9 C (7.0 F)
2004-12.2 C (10.0 F)
2005-12.2 C (10.0 F)
2006-16.1 C (3.0 F)
2007-17.8 C (0.0 F)
2008-16.1 C (3.0 F)
2009-19.4 C (-2.9 F)
2010-16.1 C (3.0 F)
2011-12.8 C (9.0 F)
2012-14.4 C (6.1 F)
2013-21.7 C (-7.1 F)
2014-13.3 C (8.1 F)
2015-15.6 C (3.9 F)
2016-17.2 C (1.0 F)
2017-16.1 C (3.0 F)
2018-18.3 C (-0.9 F)
2019-13.9 C (7.0 F)
2020-13.6 C (7.5 F)
2021-15.0 C (5.0 F)
2022-14.4 C (6.1 F)
2023-15.6 C (3.9 F)
2024-11.1 C (12.0 F)
2025-16.1 C (3.0 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

32 years with a frost

Across 32 years with a frost, the median last spring frost at Riddle Mountain Oregon falls on 14 June and the median first autumn frost on 23 September, which leaves a median of 106 days between them.

Fitted over all years, the growing season changes by +5.4 days per decade at this station.

Frost dates and growing season at Riddle Mountain Oregon
MeasureMedian, all yearsEarliest periodRecent period (1993 to 2025)Recent against earliestFitted trend
Last spring frost14 Junen/a14 Junen/a+0.3 days per decade
First autumn frost23 Septembern/a23 Septembern/a+5.7 days per decade
Growing days106 daysn/a109 daysn/a+5.4 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 Riddle Mountain Oregon standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Riddle 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 (2026-10-13).