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Built 2026-10-15 (15 October 2026)

Summit Oregon Weather Records (USR0000OSUM)

Record envelope, standing records and threshold days for Summit Oregon (USR0000OSUM), Oregon, United States, with 39 years of record.

Key Facts for Summit Oregon

  • Summit Oregon (USR0000OSUM) is a weather station in Oregon, United States at 42.23 latitude and -120.25 longitude, 1,874 m (6,147 ft) above sea level.
  • The station reports from 1985 to 2023, 39 years of record.
  • 1,464 records set at Summit Oregon still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Summit Oregon set a daily record high maximum temperature of 26.7 C (80.1 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, 42.23 latitude, -120.25 longitude.
  • Elevation: 1,874 m (6,147 ft).
  • Period of record: 1985 to 2023, 39 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

24 days at or beyond a record
Daily record high and record low at Summit Oregon, with 2026 drawn through them The band shows the record high and record low for each calendar day at Summit Oregon. The lines show the 2026 daily maximum and minimum. 24 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 Summit Oregon. The lines show the 2026 daily maximum and minimum. 24 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Summit Oregon, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan18.9 C (66.0 F)-18.9 C (-2.0 F)18.9 C (66.0 F)-12.8 C (9.0 F)
Feb17.2 C (63.0 F)-28.4 C (-19.1 F)16.7 C (62.1 F)-10.6 C (12.9 F)
Mar22.8 C (73.0 F)-14.7 C (5.5 F)22.8 C (73.0 F)-5.0 C (23.0 F)
Apr30.0 C (86.0 F)-17.7 C (0.1 F)17.2 C (63.0 F)-7.8 C (18.0 F)
May38.3 C (100.9 F)-8.8 C (16.2 F)25.6 C (78.1 F)-3.3 C (26.1 F)
Jun34.9 C (94.8 F)-3.3 C (26.1 F)29.4 C (84.9 F)-1.7 C (28.9 F)
Jul36.1 C (97.0 F)-1.4 C (29.5 F)31.1 C (88.0 F)4.4 C (39.9 F)
Aug35.0 C (95.0 F)-2.2 C (28.0 F)32.8 C (91.0 F)3.9 C (39.0 F)
Sep34.3 C (93.7 F)-5.6 C (21.9 F)26.7 C (80.1 F)0.6 C (33.1 F)
Oct29.4 C (84.9 F)-12.8 C (9.0 F)27.8 C (82.0 F)-2.8 C (27.0 F)
Nov23.9 C (75.0 F)-18.2 C (-0.8 F)n/an/a
Dec17.2 C (63.0 F)-31.6 C (-24.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Summit Oregon by the year they were set 1,464 records at Summit Oregon still stand. 2008 holds the most, with 76. 0204060801985: 611986: 441987: 301988: 431989: 321990: 381991: 331992: 291993: 221994: 301995: 101996: 421997: 171998: 161999: 372000: 262001: 192002: 452003: 312004: 202005: 332006: 342007: 642008: 762009: 462010: 362011: 242012: 282013: 322014: 242015: 592016: 322017: 432018: 202019: 212020: 272021: 412022: 592023: 432024: 302025: 342026: 33198519901995200020052010201520202025
1,464 records at Summit Oregon still stand. 2008 holds the most, with 76.
Standing records at Summit Oregon by the year they were set
Year setStanding records
198561
198644
198730
198843
198932
199038
199133
199229
199322
199430
199510
199642
199717
199816
199937
200026
200119
200245
200331
200420
200533
200634
200764
200876
200946
201036
201124
201228
201332
201424
201559
201632
201743
201820
201921
202027
202141
202259
202343
202430
202534
202633

Period of Record Coverage

1985 to 2026
Days with data per year at Summit Oregon 42 years of record at Summit Oregon, 1985 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1985, 1986, 1987, 1988, 1989, 1990, 1993, 1995 and others. 1985: 193 of 365 days1986: 277 of 365 days1987: 243 of 365 days1988: 327 of 366 days1989: 208 of 365 days1990: 237 of 365 days1991: 337 of 365 days1992: 344 of 366 days1993: 233 of 365 days1994: 362 of 365 days1995: 153 of 365 days1996: 343 of 366 days1997: 363 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 364 of 365 days2002: 364 of 365 days2003: 365 of 365 days2004: 364 of 366 days2005: 364 of 365 days2006: 357 of 365 days2007: 355 of 365 days2008: 359 of 366 days2009: 364 of 365 days2010: 365 of 365 days2011: 364 of 365 days2012: 364 of 366 days2013: 363 of 365 days2014: 364 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: 364 of 365 days2022: 364 of 365 days2023: 363 of 365 days2024: 364 of 366 days2025: 363 of 365 days2026: 284 of 365 days1990200020102020
42 years of record at Summit Oregon, 1985 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1985, 1986, 1987, 1988, 1989, 1990, 1993, 1995 and others.
Days with data per year at Summit Oregon
YearDays with dataShare of yearComplete
198519353%No
198627776%No
198724367%No
198832789%No
198920857%No
199023765%No
199133792%Yes
199234494%Yes
199323364%No
199436299%Yes
199515342%No
199634394%Yes
199736399%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001364100%Yes
2002364100%Yes
2003365100%Yes
200436499%Yes
2005364100%Yes
200635798%Yes
200735597%Yes
200835998%Yes
2009364100%Yes
2010365100%Yes
2011364100%Yes
201236499%Yes
201336399%Yes
2014364100%Yes
2015365100%Yes
2016365100%Yes
2017364100%Yes
2018365100%Yes
2019364100%Yes
2020366100%Yes
2021364100%Yes
2022364100%Yes
202336399%Yes
202436499%Yes
202536399%Yes
202628478%No

Latest Records

20
Latest records at Summit Oregon
DateStationRecordValueBeat old record byOld record stoodSignificance
7 October 2026Summit Oregon, USdaily high max (Provisional)26.7 C (80.1 F)0.6 C (1.1 F)29 years12 of 100 (Routine)
7 October 2026Summit Oregon, USdaily high min (Provisional)13.3 C (55.9 F)1.6 C (2.9 F)12 years10 of 100 (Routine)
6 October 2026Summit Oregon, USdaily high max (Tie, Provisional)26.1 C (79.0 F)tie12 years1 of 100 (Routine)
6 October 2026Summit Oregon, USdaily high min (Tie, Provisional)12.8 C (55.0 F)tie12 years1 of 100 (Routine)
5 October 2026Summit Oregon, USdaily high min (Provisional)14.4 C (57.9 F)1.8 C (3.2 F)4 years8 of 100 (Routine)
5 October 2026Summit Oregon, USdaily high max (Provisional)26.1 C (79.0 F)0.5 C (0.9 F)12 years7 of 100 (Routine)
4 October 2026Summit Oregon, USdaily high max (Provisional)27.8 C (82.0 F)3.4 C (6.1 F)12 years12 of 100 (Routine)
4 October 2026Summit Oregon, USdaily high min (Provisional)14.4 C (57.9 F)1.6 C (2.9 F)5 years8 of 100 (Routine)
3 October 2026Summit Oregon, USdaily high max (Tie, Provisional)26.7 C (80.1 F)tie5 years1 of 100 (Routine)
6 September 2026Summit Oregon, USdaily low max (Provisional)11.7 C (53.1 F)1.0 C (1.8 F)33 years15 of 100 (Routine)
3 September 2026Summit Oregon, USdaily low max (Tie, Provisional)7.8 C (46.0 F)tie25 years2 of 100 (Routine)
21 August 2026Summit Oregon, USdaily high min (Provisional)16.7 C (62.1 F)1.1 C (2.0 F)9 years9 of 100 (Routine)
8 August 2026Summit Oregon, USdaily high min (Tie)17.2 C (63.0 F)tie8 years1 of 100 (Routine)
7 August 2026Summit Oregon, USdaily high max32.8 C (91.0 F)0.6 C (1.1 F)24 years12 of 100 (Routine)
6 August 2026Summit Oregon, USdaily high max32.8 C (91.0 F)0.1 C (0.2 F)36 years14 of 100 (Routine)
29 June 2026Summit Oregon, USdaily low min2.8 C (37.0 F)0.5 C (0.9 F)33 years15 of 100 (Routine)
28 June 2026Summit Oregon, USdaily low min0.6 C (33.1 F)2.2 C (4.0 F)7 years11 of 100 (Routine)
27 June 2026Summit Oregon, USdaily low min1.7 C (35.1 F)0.5 C (0.9 F)28 years13 of 100 (Routine)
16 June 2026Summit Oregon, USdaily high min14.4 C (57.9 F)2.1 C (3.8 F)37 years19 of 100 (Routine)
16 June 2026Summit Oregon, USdaily high max29.4 C (84.9 F)2.2 C (4.0 F)23 years13 of 100 (Routine)

Climate Trend

31 complete years, 1994 to 2025
Annual mean temperature at Summit Oregon as warming stripes, 1994 to 2025 One stripe for each of 31 complete years at Summit Oregon, 1994 to 2025. Blue stripes are years cooler than the station's own mean of 7.6 C (45.6 F); red stripes are warmer. The coolest year was 1998, at 6.3 C (43.3 F), and the warmest was 2015, at 9.0 C (48.1 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1994: 6.9 C, -0.6 C from the station mean1996: 7.1 C, -0.5 C from the station mean1997: 6.9 C, -0.6 C from the station mean1998: 6.3 C, -1.3 C from the station mean1999: 6.8 C, -0.7 C from the station mean2000: 7.1 C, -0.5 C from the station mean2001: 7.4 C, -0.1 C from the station mean2002: 7.3 C, -0.3 C from the station mean2003: 7.6 C, 0.0 C from the station mean2004: 7.6 C, 0.0 C from the station mean2005: 7.3 C, -0.3 C from the station mean2006: 7.3 C, -0.3 C from the station mean2007: 8.3 C, +0.8 C from the station mean2008: 7.9 C, +0.4 C from the station mean2009: 7.4 C, -0.2 C from the station mean2010: 6.8 C, -0.8 C from the station mean2011: 6.6 C, -1.0 C from the station mean2012: 7.7 C, +0.1 C from the station mean2013: 7.6 C, +0.1 C from the station mean2014: 8.7 C, +1.1 C from the station mean2015: 9.0 C, +1.4 C from the station mean2016: 7.9 C, +0.4 C from the station mean2017: 7.8 C, +0.3 C from the station mean2018: 7.8 C, +0.2 C from the station mean2019: 7.0 C, -0.5 C from the station mean2020: 8.3 C, +0.7 C from the station mean2021: 8.3 C, +0.8 C from the station mean2022: 8.0 C, +0.5 C from the station mean2023: 7.1 C, -0.5 C from the station mean2024: 8.2 C, +0.7 C from the station mean2025: 8.6 C, +1.0 C from the station mean1994200020052010201520202025
One stripe for each of 31 complete years at Summit Oregon, 1994 to 2025. Blue stripes are years cooler than the station's own mean of 7.6 C (45.6 F); red stripes are warmer. The coolest year was 1998, at 6.3 C (43.3 F), and the warmest was 2015, at 9.0 C (48.1 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Summit Oregon as warming stripes, 1994 to 2025
YearAnnual mean temperatureDifference from the station mean
19946.9 C-0.63 C
19967.1 C-0.48 C
19976.9 C-0.62 C
19986.3 C-1.26 C
19996.8 C-0.74 C
20007.1 C-0.48 C
20017.4 C-0.14 C
20027.3 C-0.26 C
20037.6 C+0.00 C
20047.6 C-0.01 C
20057.3 C-0.31 C
20067.3 C-0.28 C
20078.3 C+0.76 C
20087.9 C+0.37 C
20097.4 C-0.19 C
20106.8 C-0.76 C
20116.6 C-0.98 C
20127.7 C+0.12 C
20137.6 C+0.06 C
20148.7 C+1.09 C
20159.0 C+1.40 C
20167.9 C+0.35 C
20177.8 C+0.28 C
20187.8 C+0.19 C
20197.0 C-0.55 C
20208.3 C+0.70 C
20218.3 C+0.75 C
20228.0 C+0.47 C
20237.1 C-0.51 C
20248.2 C+0.65 C
20258.6 C+1.00 C

The annual mean temperature here has risen by 0.4 C (0.2 to 0.6) per decade over 1994 to 2025. In Fahrenheit: 0.8 F (0.4 to 1.1) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Summit Oregon
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.4 C (0.2 to 0.6) per decade0.8 F (0.4 to 1.1) per decade1994 to 202531Rise
Mean daily maximum0.5 C (0.3 to 0.8) per decade1.0 F (0.5 to 1.5) per decade1994 to 202531Rise
Mean daily minimum0.3 C (0.1 to 0.5) per decade0.6 F (0.2 to 0.9) per decade1994 to 202531Rise

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 Summit Oregon: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)38.3 C (100.9 F)200832.7 C (90.9 F)42
Coldest night (TNn)-31.6 C (-24.9 F)1990-16.0 C (3.2 F)42

Hottest day (TXx)

Hottest day (TXx) at Summit Oregon by year The hottest day of the year at Summit Oregon, 1985 to 2026. The record is 38.3 C (100.9 F) in 2008, marked on the chart; the median year is 32.7 C (90.9 F). 27.53032.53537.5401990200020102020Record: 38.3 C (100.9 F) in 2008
The hottest day of the year at Summit Oregon, 1985 to 2026. The record is 38.3 C (100.9 F) in 2008, marked on the chart; the median year is 32.7 C (90.9 F).
Hottest day (TXx) at Summit Oregon by year
YearHottest day (TXx)
198531.9 C (89.4 F)
198630.0 C (86.0 F)
198730.8 C (87.4 F)
198832.7 C (90.9 F)
198929.6 C (85.3 F)
199032.7 C (90.9 F)
199129.6 C (85.3 F)
199232.7 C (90.9 F)
199329.6 C (85.3 F)
199431.6 C (88.9 F)
199528.3 C (82.9 F)
199632.2 C (90.0 F)
199731.7 C (89.1 F)
199832.2 C (90.0 F)
199932.2 C (90.0 F)
200031.1 C (88.0 F)
200132.2 C (90.0 F)
200236.1 C (97.0 F)
200335.6 C (96.1 F)
200431.1 C (88.0 F)
200532.8 C (91.0 F)
200634.4 C (93.9 F)
200735.0 C (95.0 F)
200838.3 C (100.9 F)
200933.3 C (91.9 F)
201032.2 C (90.0 F)
201131.1 C (88.0 F)
201232.2 C (90.0 F)
201332.8 C (91.0 F)
201432.8 C (91.0 F)
201533.9 C (93.0 F)
201633.3 C (91.9 F)
201733.9 C (93.0 F)
201835.0 C (95.0 F)
201931.1 C (88.0 F)
202033.9 C (93.0 F)
202134.9 C (94.8 F)
202234.6 C (94.3 F)
202332.8 C (91.0 F)
202434.4 C (93.9 F)
202533.3 C (91.9 F)
202632.8 C (91.0 F)

Coldest night (TNn)

Coldest night (TNn) at Summit Oregon by year The coldest night of the year at Summit Oregon, 1985 to 2026. The record is -31.6 C (-24.9 F) in 1990, marked on the chart; the median year is -16.0 C (3.2 F). -40-30-20-101990200020102020Record: -31.6 C (-24.9 F) in 1990
The coldest night of the year at Summit Oregon, 1985 to 2026. The record is -31.6 C (-24.9 F) in 1990, marked on the chart; the median year is -16.0 C (3.2 F).
Coldest night (TNn) at Summit Oregon by year
YearColdest night (TNn)
1985-17.1 C (1.2 F)
1986-13.1 C (8.4 F)
1987-15.9 C (3.4 F)
1988-15.5 C (4.1 F)
1989-28.4 C (-19.1 F)
1990-31.6 C (-24.9 F)
1991-13.1 C (8.4 F)
1992-13.6 C (7.5 F)
1993-18.2 C (-0.8 F)
1994-18.2 C (-0.8 F)
1995-10.6 C (12.9 F)
1996-15.0 C (5.0 F)
1997-18.9 C (-2.0 F)
1998-24.4 C (-11.9 F)
1999-13.9 C (7.0 F)
2000-11.7 C (10.9 F)
2001-13.9 C (7.0 F)
2002-15.0 C (5.0 F)
2003-13.3 C (8.1 F)
2004-12.2 C (10.0 F)
2005-14.4 C (6.1 F)
2006-17.2 C (1.0 F)
2007-18.3 C (-0.9 F)
2008-16.1 C (3.0 F)
2009-19.4 C (-2.9 F)
2010-18.3 C (-0.9 F)
2011-19.4 C (-2.9 F)
2012-15.0 C (5.0 F)
2013-21.7 C (-7.1 F)
2014-16.7 C (1.9 F)
2015-15.6 C (3.9 F)
2016-17.2 C (1.0 F)
2017-18.3 C (-0.9 F)
2018-16.7 C (1.9 F)
2019-15.6 C (3.9 F)
2020-13.6 C (7.5 F)
2021-13.9 C (7.0 F)
2022-19.4 C (-2.9 F)
2023-18.5 C (-1.3 F)
2024-11.1 C (12.0 F)
2025-16.7 C (1.9 F)
2026-12.8 C (9.0 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

31 years with a frost

Across 31 years with a frost, the median last spring frost at Summit Oregon falls on 15 June and the median first autumn frost on 21 September, which leaves a median of 99 days between them.

Fitted over all years, the growing season changes by +7.7 days per decade at this station.

Frost dates and growing season at Summit Oregon
MeasureMedian, all yearsEarliest periodRecent period (1996 to 2025)Recent against earliestFitted trend
Last spring frost15 Junen/a15 Junen/a+2.2 days per decade
First autumn frost21 Septembern/a22 Septembern/a+9.9 days per decade
Growing days99 daysn/a99 daysn/a+7.7 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 Summit Oregon standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Summit 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).