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Built 2026-10-15 (15 October 2026)

Slide Mountain Oregon Weather Records (USR0000OSLI)

Record envelope, standing records and threshold days for Slide Mountain Oregon (USR0000OSLI), Oregon, United States, with 39 years of record.

Key Facts for Slide Mountain Oregon

  • Slide Mountain Oregon (USR0000OSLI) is a weather station in Oregon, United States at 44.46 latitude and -120.29 longitude, 1,737 m (5,700 ft) above sea level.
  • The station reports from 1985 to 2023, 39 years of record.
  • 1,464 records set at Slide Mountain Oregon still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Slide Mountain Oregon set a daily record low maximum temperature of -1.1 C (30.0 F) on 11 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, 44.46 latitude, -120.29 longitude.
  • Elevation: 1,737 m (5,700 ft).
  • Period of record: 1985 to 2023, 39 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

23 days at or beyond a record
Daily record high and record low at Slide Mountain Oregon, with 2026 drawn through them The band shows the record high and record low for each calendar day at Slide Mountain Oregon. The lines show the 2026 daily maximum and minimum. 23 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 Slide Mountain Oregon. The lines show the 2026 daily maximum and minimum. 23 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Slide Mountain Oregon, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan16.1 C (61.0 F)-22.2 C (-8.0 F)14.4 C (57.9 F)-13.9 C (7.0 F)
Feb17.2 C (63.0 F)-30.6 C (-23.1 F)14.4 C (57.9 F)-9.4 C (15.1 F)
Mar20.6 C (69.1 F)-16.1 C (3.0 F)20.6 C (69.1 F)-8.9 C (16.0 F)
Apr24.4 C (75.9 F)-12.8 C (9.0 F)18.3 C (64.9 F)-7.2 C (19.0 F)
May28.9 C (84.0 F)-8.3 C (17.1 F)25.6 C (78.1 F)-3.3 C (26.1 F)
Jun35.0 C (95.0 F)-4.4 C (24.1 F)27.8 C (82.0 F)-1.7 C (28.9 F)
Jul35.0 C (95.0 F)-2.8 C (27.0 F)32.8 C (91.0 F)-0.6 C (30.9 F)
Aug34.4 C (93.9 F)-1.7 C (28.9 F)31.1 C (88.0 F)1.1 C (34.0 F)
Sep34.4 C (93.9 F)-5.6 C (21.9 F)26.1 C (79.0 F)0.0 C (32.0 F)
Oct27.2 C (81.0 F)-16.7 C (1.9 F)26.7 C (80.1 F)-4.4 C (24.1 F)
Nov19.4 C (66.9 F)-20.0 C (-4.0 F)n/an/a
Dec16.7 C (62.1 F)-30.6 C (-23.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Slide Mountain Oregon by the year they were set 1,464 records at Slide Mountain Oregon still stand. 1999 holds the most, with 66. 0204060801985: 81986: 641987: 431988: 611989: 501990: 481991: 321992: 461993: 551994: 421995: 391996: 611997: 171998: 241999: 662000: 252001: 222002: 422003: 412004: 222005: 152006: 192007: 202008: 442009: 412010: 232011: 282012: 332013: 372014: 212015: 422016: 282017: 322018: 192019: 342020: 222021: 332022: 612023: 322024: 202025: 302026: 22198519901995200020052010201520202025
1,464 records at Slide Mountain Oregon still stand. 1999 holds the most, with 66.
Standing records at Slide Mountain Oregon by the year they were set
Year setStanding records
19858
198664
198743
198861
198950
199048
199132
199246
199355
199442
199539
199661
199717
199824
199966
200025
200122
200242
200341
200422
200515
200619
200720
200844
200941
201023
201128
201233
201337
201421
201542
201628
201732
201819
201934
202022
202133
202261
202332
202420
202530
202622

All-Time Record Progression

1 new records
When Slide Mountain Oregon set new all-time records 1 all-time records were set at Slide Mountain Oregon between 28 June 2021 and 28 June 2021. Each dot is a new record. Record high minimum temperature28 June 2021: Record high minimum temperature 22.2 C (72.0 F)
1 all-time records were set at Slide Mountain Oregon between 28 June 2021 and 28 June 2021. Each dot is a new record.
When Slide Mountain Oregon set new all-time records
DateKindDetail
2021-06-28Record high minimum temperatureRecord high minimum temperature 22.2 C (72.0 F)

Period of Record Coverage

1985 to 2026
Days with data per year at Slide Mountain Oregon 42 years of record at Slide Mountain Oregon, 1985 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1985, 1986, 2004, 2005, 2006, 2007, 2008, 2014 and others. 1985: 66 of 365 days1986: 318 of 365 days1987: 344 of 365 days1988: 361 of 366 days1989: 354 of 365 days1990: 358 of 365 days1991: 365 of 365 days1992: 365 of 366 days1993: 356 of 365 days1994: 363 of 365 days1995: 362 of 365 days1996: 364 of 366 days1997: 361 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 363 of 365 days2002: 345 of 365 days2003: 363 of 365 days2004: 326 of 366 days2005: 240 of 365 days2006: 259 of 365 days2007: 328 of 365 days2008: 295 of 366 days2009: 364 of 365 days2010: 362 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 260 of 365 days2015: 365 of 365 days2016: 365 of 366 days2017: 364 of 365 days2018: 365 of 365 days2019: 364 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 283 of 365 days1990200020102020
42 years of record at Slide Mountain Oregon, 1985 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1985, 1986, 2004, 2005, 2006, 2007, 2008, 2014 and others.
Days with data per year at Slide Mountain Oregon
YearDays with dataShare of yearComplete
19856618%No
198631887%No
198734494%Yes
198836199%Yes
198935497%Yes
199035898%Yes
1991365100%Yes
1992365100%Yes
199335698%Yes
199436399%Yes
199536299%Yes
199636499%Yes
199736199%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
200136399%Yes
200234595%Yes
200336399%Yes
200432689%No
200524066%No
200625971%No
200732890%No
200829581%No
2009364100%Yes
201036299%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
201426071%No
2015365100%Yes
2016365100%Yes
2017364100%Yes
2018365100%Yes
2019364100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628378%No

Latest Records

20
Latest records at Slide Mountain Oregon
DateStationRecordValueBeat old record byOld record stoodSignificance
11 October 2026Slide Mountain Oregon, USdaily low max (Provisional)-1.1 C (30.0 F)2.8 C (5.0 F)17 years13 of 100 (Routine)
8 October 2026Slide Mountain Oregon, USdaily high max (Tie, Provisional)25.0 C (77.0 F)tie37 years3 of 100 (Routine)
7 October 2026Slide Mountain Oregon, USdaily high max (Provisional)26.1 C (79.0 F)2.2 C (4.0 F)37 years18 of 100 (Routine)
5 October 2026Slide Mountain Oregon, USdaily high max (Tie, Provisional)25.0 C (77.0 F)tie4 years1 of 100 (Routine)
4 October 2026Slide Mountain Oregon, USdaily high max (Provisional)26.7 C (80.1 F)1.7 C (3.1 F)4 years7 of 100 (Routine)
3 October 2026Slide Mountain Oregon, USdaily high max (Provisional)24.4 C (75.9 F)0.5 C (0.9 F)32 years13 of 100 (Routine)
13 September 2026Slide Mountain Oregon, USdaily low max (Provisional)9.4 C (48.9 F)1.7 C (3.1 F)21 years12 of 100 (Routine)
6 September 2026Slide Mountain Oregon, USdaily low max (Provisional)10.6 C (51.1 F)0.5 C (0.9 F)33 years14 of 100 (Routine)
21 August 2026Slide Mountain Oregon, USdaily high min (Provisional)16.7 C (62.1 F)1.7 C (3.1 F)23 years14 of 100 (Routine)
7 August 2026Slide Mountain Oregon, USdaily high max (Tie)30.6 C (87.1 F)tie20 years2 of 100 (Routine)
3 August 2026Slide Mountain Oregon, USdaily low min1.7 C (35.1 F)0.5 C (0.9 F)36 years16 of 100 (Routine)
20 July 2026Slide Mountain Oregon, USdaily high min (Tie)14.4 C (57.9 F)tie37 years3 of 100 (Routine)
15 July 2026Slide Mountain Oregon, USdaily high min13.9 C (57.0 F)0.6 C (1.1 F)36 years15 of 100 (Routine)
1 July 2026Slide Mountain Oregon, USdaily low min-0.6 C (30.9 F)0.6 C (1.1 F)5 years6 of 100 (Routine)
27 June 2026Slide Mountain Oregon, USdaily low max8.3 C (46.9 F)3.4 C (6.1 F)20 years15 of 100 (Routine)
16 June 2026Slide Mountain Oregon, USdaily high max27.8 C (82.0 F)3.4 C (6.1 F)37 years20 of 100 (Routine)
15 June 2026Slide Mountain Oregon, USdaily high max (Tie)26.1 C (79.0 F)tie24 years2 of 100 (Routine)
12 May 2026Slide Mountain Oregon, USdaily high max (Tie)25.6 C (78.1 F)tie32 years3 of 100 (Routine)
3 May 2026Slide Mountain Oregon, USdaily high min (Tie)8.3 C (46.9 F)tie33 years3 of 100 (Routine)
2 May 2026Slide Mountain Oregon, USdaily high min7.8 C (46.0 F)0.6 C (1.1 F)21 years11 of 100 (Routine)

Climate Trend

32 complete years, 1987 to 2025
Annual mean temperature at Slide Mountain Oregon as warming stripes, 1987 to 2025 One stripe for each of 32 complete years at Slide Mountain Oregon, 1987 to 2025. Blue stripes are years cooler than the station's own mean of 5.8 C (42.5 F); red stripes are warmer. The coolest year was 1993, at 4.3 C (39.7 F), and the warmest was 2015, at 7.5 C (45.4 F). The strongest colour marks a difference of 1.7 C (3.1 F). 1987: 6.1 C, +0.2 C from the station mean1988: 5.6 C, -0.3 C from the station mean1989: 4.8 C, -1.1 C from the station mean1990: 5.0 C, -0.9 C from the station mean1991: 5.4 C, -0.5 C from the station mean1992: 6.6 C, +0.8 C from the station mean1993: 4.3 C, -1.6 C from the station mean1994: 5.7 C, -0.1 C from the station mean1995: 5.4 C, -0.5 C from the station mean1996: 5.1 C, -0.7 C from the station mean1997: 5.2 C, -0.6 C from the station mean1998: 5.4 C, -0.4 C from the station mean1999: 5.4 C, -0.4 C from the station mean2000: 5.8 C, -0.1 C from the station mean2001: 5.8 C, -0.1 C from the station mean2003: 6.6 C, +0.8 C from the station mean2009: 6.0 C, +0.2 C from the station mean2010: 5.5 C, -0.4 C from the station mean2011: 5.2 C, -0.6 C from the station mean2012: 5.9 C, +0.1 C from the station mean2013: 6.0 C, +0.2 C from the station mean2015: 7.5 C, +1.6 C from the station mean2016: 6.1 C, +0.2 C from the station mean2017: 6.1 C, +0.3 C from the station mean2018: 5.7 C, -0.2 C from the station mean2019: 5.2 C, -0.6 C from the station mean2020: 6.6 C, +0.8 C from the station mean2021: 6.5 C, +0.7 C from the station mean2022: 6.4 C, +0.6 C from the station mean2023: 6.1 C, +0.2 C from the station mean2024: 6.6 C, +0.7 C from the station mean2025: 7.2 C, +1.3 C from the station mean198719901995200020052010201520202025
One stripe for each of 32 complete years at Slide Mountain Oregon, 1987 to 2025. Blue stripes are years cooler than the station's own mean of 5.8 C (42.5 F); red stripes are warmer. The coolest year was 1993, at 4.3 C (39.7 F), and the warmest was 2015, at 7.5 C (45.4 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Slide Mountain Oregon as warming stripes, 1987 to 2025
YearAnnual mean temperatureDifference from the station mean
19876.1 C+0.24 C
19885.6 C-0.27 C
19894.8 C-1.05 C
19905.0 C-0.85 C
19915.4 C-0.45 C
19926.6 C+0.80 C
19934.3 C-1.56 C
19945.7 C-0.13 C
19955.4 C-0.45 C
19965.1 C-0.72 C
19975.2 C-0.60 C
19985.4 C-0.41 C
19995.4 C-0.39 C
20005.8 C-0.05 C
20015.8 C-0.05 C
20036.6 C+0.81 C
20096.0 C+0.21 C
20105.5 C-0.36 C
20115.2 C-0.58 C
20125.9 C+0.10 C
20136.0 C+0.21 C
20157.5 C+1.63 C
20166.1 C+0.24 C
20176.1 C+0.29 C
20185.7 C-0.15 C
20195.2 C-0.64 C
20206.6 C+0.76 C
20216.5 C+0.67 C
20226.4 C+0.56 C
20236.1 C+0.25 C
20246.6 C+0.75 C
20257.2 C+1.35 C

The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1987 to 2025. In Fahrenheit: 0.6 F (0.3 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 Slide Mountain Oregon
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.1 to 0.5) per decade0.6 F (0.3 to 0.9) per decade1987 to 202532Rise
Mean daily maximum0.4 C (0.2 to 0.7) per decade0.8 F (0.4 to 1.2) per decade1987 to 202532Rise
Mean daily minimum0.18 C (0.03 to 0.33) per decade0.3 F (0.1 to 0.6) per decade1987 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

1985 to 2026
Yearly extremes at Slide Mountain Oregon: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)35.0 C (95.0 F)200232.0 C (89.5 F)42
Coldest night (TNn)-30.6 C (-23.1 F)1989-18.9 C (-2.0 F)42

Hottest day (TXx)

Hottest day (TXx) at Slide Mountain Oregon by year The hottest day of the year at Slide Mountain Oregon, 1985 to 2026. The record is 35.0 C (95.0 F) in 2002, marked on the chart; the median year is 32.0 C (89.5 F). 2527.53032.5351990200020102020Record: 35.0 C (95.0 F) in 2002
The hottest day of the year at Slide Mountain Oregon, 1985 to 2026. The record is 35.0 C (95.0 F) in 2002, marked on the chart; the median year is 32.0 C (89.5 F).
Hottest day (TXx) at Slide Mountain Oregon by year
YearHottest day (TXx)
198531.0 C (87.8 F)
198631.1 C (88.0 F)
198731.1 C (88.0 F)
198832.2 C (90.0 F)
198926.7 C (80.1 F)
199032.2 C (90.0 F)
199128.9 C (84.0 F)
199231.1 C (88.0 F)
199327.8 C (82.0 F)
199431.1 C (88.0 F)
199528.9 C (84.0 F)
199632.2 C (90.0 F)
199730.0 C (86.0 F)
199832.8 C (91.0 F)
199929.4 C (84.9 F)
200031.1 C (88.0 F)
200130.0 C (86.0 F)
200235.0 C (95.0 F)
200334.4 C (93.9 F)
200431.7 C (89.1 F)
200531.1 C (88.0 F)
200633.9 C (93.0 F)
200733.3 C (91.9 F)
200833.9 C (93.0 F)
200934.4 C (93.9 F)
201032.2 C (90.0 F)
201128.9 C (84.0 F)
201230.6 C (87.1 F)
201330.6 C (87.1 F)
201427.8 C (82.0 F)
201532.2 C (90.0 F)
201630.6 C (87.1 F)
201734.4 C (93.9 F)
201833.3 C (91.9 F)
201930.0 C (86.0 F)
202035.0 C (95.0 F)
202135.0 C (95.0 F)
202235.0 C (95.0 F)
202333.3 C (91.9 F)
202433.9 C (93.0 F)
202532.8 C (91.0 F)
202632.8 C (91.0 F)

Coldest night (TNn)

Coldest night (TNn) at Slide Mountain Oregon by year The coldest night of the year at Slide Mountain Oregon, 1985 to 2026. The record is -30.6 C (-23.1 F) in 1989, marked on the chart; the median year is -18.9 C (-2.0 F). -40-30-20-1001990200020102020Record: -30.6 C (-23.1 F) in 1989
The coldest night of the year at Slide Mountain Oregon, 1985 to 2026. The record is -30.6 C (-23.1 F) in 1989, marked on the chart; the median year is -18.9 C (-2.0 F).
Coldest night (TNn) at Slide Mountain Oregon by year
YearColdest night (TNn)
1985-4.0 C (24.8 F)
1986-15.6 C (3.9 F)
1987-20.0 C (-4.0 F)
1988-16.7 C (1.9 F)
1989-30.6 C (-23.1 F)
1990-30.6 C (-23.1 F)
1991-16.7 C (1.9 F)
1992-16.1 C (3.0 F)
1993-22.8 C (-9.0 F)
1994-22.2 C (-8.0 F)
1995-21.1 C (-6.0 F)
1996-20.6 C (-5.1 F)
1997-19.4 C (-2.9 F)
1998-26.7 C (-16.1 F)
1999-12.8 C (9.0 F)
2000-14.4 C (6.1 F)
2001-15.0 C (5.0 F)
2002-14.4 C (6.1 F)
2003-16.1 C (3.0 F)
2004-13.3 C (8.1 F)
2005-13.3 C (8.1 F)
2006-23.9 C (-11.0 F)
2007-22.2 C (-8.0 F)
2008-21.1 C (-6.0 F)
2009-23.9 C (-11.0 F)
2010-18.9 C (-2.0 F)
2011-21.7 C (-7.1 F)
2012-13.3 C (8.1 F)
2013-23.3 C (-9.9 F)
2014-23.3 C (-9.9 F)
2015-15.0 C (5.0 F)
2016-17.2 C (1.0 F)
2017-21.1 C (-6.0 F)
2018-18.9 C (-2.0 F)
2019-17.8 C (0.0 F)
2020-13.3 C (8.1 F)
2021-16.7 C (1.9 F)
2022-20.6 C (-5.1 F)
2023-20.6 C (-5.1 F)
2024-17.2 C (1.0 F)
2025-18.9 C (-2.0 F)
2026-13.9 C (7.0 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 Slide Mountain Oregon falls on 19 June and the median first autumn frost on 12 September, which leaves a median of 89 days between them.

Fitted over all years, the growing season changes by +5.1 days per decade at this station.

Frost dates and growing season at Slide Mountain Oregon
MeasureMedian, all yearsEarliest periodRecent period (1989 to 2025)Recent against earliestFitted trend
Last spring frost19 Junen/a19 Junen/a-0.9 days per decade
First autumn frost12 Septembern/a15 Septembern/a+4.2 days per decade
Growing days89 daysn/a90 daysn/a+5.1 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 Slide Mountain Oregon standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Slide 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).