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Built 2026-10-18 (18 October 2026)

Illinois Valley Airport Oregon Weather Records (USR0000OILL)

Record envelope, standing records and threshold days for Illinois Valley Airport Oregon (USR0000OILL), Oregon, United States, with 39 years of record.

Key Facts for Illinois Valley Airport Oregon

  • Illinois Valley Airport Oregon (USR0000OILL) is a weather station in Oregon, United States at 42.10 latitude and -123.69 longitude, 423 m (1,389 ft) above sea level.
  • The station reports from 1985 to 2023, 39 years of record.
  • 1,464 records set at Illinois Valley Airport Oregon still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Illinois Valley Airport Oregon set a daily record high maximum temperature of 35.0 C (95.0 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, 42.10 latitude, -123.69 longitude.
  • Elevation: 423 m (1,389 ft).
  • Period of record: 1985 to 2023, 39 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

21 days at or beyond a record
Daily record high and record low at Illinois Valley Airport Oregon, with 2026 drawn through them The band shows the record high and record low for each calendar day at Illinois Valley Airport Oregon. The lines show the 2026 daily maximum and minimum. 21 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Illinois Valley Airport Oregon. The lines show the 2026 daily maximum and minimum. 21 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Illinois Valley Airport Oregon, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan20.0 C (68.0 F)-12.2 C (10.0 F)20.0 C (68.0 F)-7.8 C (18.0 F)
Feb25.6 C (78.1 F)-20.2 C (-4.4 F)20.6 C (69.1 F)-5.0 C (23.0 F)
Mar30.6 C (87.1 F)-9.4 C (15.1 F)30.6 C (87.1 F)-2.8 C (27.0 F)
Apr34.4 C (93.9 F)-5.6 C (21.9 F)27.2 C (81.0 F)-3.3 C (26.1 F)
May38.3 C (100.9 F)-3.9 C (25.0 F)32.2 C (90.0 F)1.7 C (35.1 F)
Jun44.4 C (111.9 F)-2.2 C (28.0 F)38.9 C (102.0 F)2.8 C (37.0 F)
Jul45.0 C (113.0 F)2.8 C (37.0 F)37.2 C (99.0 F)6.1 C (43.0 F)
Aug43.3 C (109.9 F)1.1 C (34.0 F)41.1 C (106.0 F)5.6 C (42.1 F)
Sep43.3 C (109.9 F)-2.9 C (26.8 F)36.7 C (98.1 F)3.3 C (37.9 F)
Oct37.8 C (100.0 F)-11.1 C (12.0 F)35.0 C (95.0 F)5.0 C (41.0 F)
Nov26.7 C (80.1 F)-12.8 C (9.0 F)n/an/a
Dec18.3 C (64.9 F)-18.2 C (-0.8 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Illinois Valley Airport Oregon by the year they were set 1,464 records at Illinois Valley Airport Oregon still stand. 1985 holds the most, with 56. 02040601985: 561986: 531987: 491988: 471989: 431990: 481991: 401992: 401993: 481994: 421995: 481996: 411997: 321998: 251999: 562000: 272001: 252002: 472003: 422004: 232005: 322006: 322007: 312008: 332009: 342010: 212011: 172012: 272013: 332014: 332015: 322016: 282017: 462018: 262019: 232020: 182021: 262022: 442023: 162024: 242025: 312026: 25198519901995200020052010201520202025
1,464 records at Illinois Valley Airport Oregon still stand. 1985 holds the most, with 56.
Standing records at Illinois Valley Airport Oregon by the year they were set
Year setStanding records
198556
198653
198749
198847
198943
199048
199140
199240
199348
199442
199548
199641
199732
199825
199956
200027
200125
200247
200342
200423
200532
200632
200731
200833
200934
201021
201117
201227
201333
201433
201532
201628
201746
201826
201923
202018
202126
202244
202316
202424
202531
202625

All-Time Record Progression

1 new records
When Illinois Valley Airport Oregon set new all-time records 1 all-time records were set at Illinois Valley Airport Oregon between 6 July 2024 and 6 July 2024. Each dot is a new record. Record high maximum temperature6 July 2024: Record high maximum temperature 45.0 C (113.0 F)2025
1 all-time records were set at Illinois Valley Airport Oregon between 6 July 2024 and 6 July 2024. Each dot is a new record.
When Illinois Valley Airport Oregon set new all-time records
DateKindDetail
2024-07-06Record high maximum temperatureRecord high maximum temperature 45.0 C (113.0 F)

Period of Record Coverage

1985 to 2026
Days with data per year at Illinois Valley Airport Oregon 42 years of record at Illinois Valley Airport Oregon, 1985 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1985, 2026. 1985: 301 of 365 days1986: 347 of 365 days1987: 359 of 365 days1988: 349 of 366 days1989: 349 of 365 days1990: 342 of 365 days1991: 341 of 365 days1992: 366 of 366 days1993: 349 of 365 days1994: 363 of 365 days1995: 356 of 365 days1996: 360 of 366 days1997: 346 of 365 days1998: 365 of 365 days1999: 364 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 365 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 364 of 366 days2017: 365 of 365 days2018: 364 of 365 days2019: 365 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 Illinois Valley Airport Oregon, 1985 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1985, 2026.
Days with data per year at Illinois Valley Airport Oregon
YearDays with dataShare of yearComplete
198530182%No
198634795%Yes
198735998%Yes
198834995%Yes
198934996%Yes
199034294%Yes
199134193%Yes
1992366100%Yes
199334996%Yes
199436399%Yes
199535698%Yes
199636098%Yes
199734695%Yes
1998365100%Yes
1999364100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004365100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
201636499%Yes
2017365100%Yes
2018364100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628378%No

Latest Records

20
Latest records at Illinois Valley Airport Oregon
DateStationRecordValueBeat old record byOld record stoodSignificance
7 October 2026Illinois Valley Airport Oregon, USdaily high max (Provisional)35.0 C (95.0 F)1.1 C (2.0 F)4 years6 of 100 (Routine)
5 October 2026Illinois Valley Airport Oregon, USdaily high max (Tie, Provisional)35.0 C (95.0 F)tie12 years1 of 100 (Routine)
3 October 2026Illinois Valley Airport Oregon, USdaily high max (Provisional)35.0 C (95.0 F)0.6 C (1.1 F)24 years12 of 100 (Routine)
4 September 2026Illinois Valley Airport Oregon, USdaily low max (Provisional)18.3 C (64.9 F)2.8 C (5.0 F)25 years15 of 100 (Routine)
3 September 2026Illinois Valley Airport Oregon, USdaily low max (Provisional)17.2 C (63.0 F)1.1 C (2.0 F)25 years12 of 100 (Routine)
2 September 2026Illinois Valley Airport Oregon, USdaily low max (Provisional)15.0 C (59.0 F)1.7 C (3.1 F)25 years13 of 100 (Routine)
13 August 2026Illinois Valley Airport Oregon, USdaily high min16.7 C (62.1 F)0.4 C (0.7 F)40 years17 of 100 (Routine)
12 August 2026Illinois Valley Airport Oregon, USdaily high min17.8 C (64.0 F)1.9 C (3.4 F)40 years22 of 100 (Routine)
11 August 2026Illinois Valley Airport Oregon, USdaily high min19.4 C (66.9 F)4.4 C (7.9 F)12 years21 of 100 (Routine)
7 August 2026Illinois Valley Airport Oregon, USdaily high max40.0 C (104.0 F)0.2 C (0.4 F)40 years16 of 100 (Routine)
5 August 2026Illinois Valley Airport Oregon, USdaily high max (Tie)39.4 C (102.9 F)tie28 years3 of 100 (Routine)
20 July 2026Illinois Valley Airport Oregon, USdaily high min19.4 C (66.9 F)3.8 C (6.8 F)8 years17 of 100 (Routine)
13 July 2026Illinois Valley Airport Oregon, USdaily low min (Tie)6.1 C (43.0 F)tie28 years3 of 100 (Routine)
17 June 2026Illinois Valley Airport Oregon, USmonthly high min (Tie)19.4 C (66.9 F)tie40 years6 of 100 (Routine)
16 June 2026Illinois Valley Airport Oregon, USdaily high max36.7 C (98.1 F)2.3 C (4.1 F)23 years13 of 100 (Routine)
15 June 2026Illinois Valley Airport Oregon, USdaily high max38.3 C (100.9 F)3.6 C (6.5 F)37 years20 of 100 (Routine)
14 June 2026Illinois Valley Airport Oregon, USdaily high max38.9 C (102.0 F)4.5 C (8.1 F)25 years18 of 100 (Routine)
13 June 2026Illinois Valley Airport Oregon, USdaily high max35.6 C (96.1 F)0.5 C (0.9 F)40 years16 of 100 (Routine)
5 May 2026Illinois Valley Airport Oregon, USdaily high min (Tie)10.6 C (51.1 F)tie20 years2 of 100 (Routine)
17 April 2026Illinois Valley Airport Oregon, USdaily low min-3.3 C (26.1 F)0.5 C (0.9 F)12 years8 of 100 (Routine)

Climate Trend

35 complete years, 1987 to 2025
Annual mean temperature at Illinois Valley Airport Oregon as warming stripes, 1987 to 2025 One stripe for each of 35 complete years at Illinois Valley Airport Oregon, 1987 to 2025. Blue stripes are years cooler than the station's own mean of 12.2 C (53.9 F); red stripes are warmer. The coolest year was 1993, at 10.6 C (51.1 F), and the warmest was 2014, at 13.6 C (56.5 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1987: 11.7 C, -0.4 C from the station mean1990: 11.4 C, -0.7 C from the station mean1992: 12.7 C, +0.5 C from the station mean1993: 10.6 C, -1.6 C from the station mean1994: 11.5 C, -0.6 C from the station mean1995: 12.4 C, +0.3 C from the station mean1996: 12.4 C, +0.2 C from the station mean1998: 11.9 C, -0.3 C from the station mean1999: 11.3 C, -0.9 C from the station mean2000: 11.9 C, -0.3 C from the station mean2001: 12.2 C, 0.0 C from the station mean2002: 12.3 C, +0.1 C from the station mean2003: 12.7 C, +0.5 C from the station mean2004: 12.7 C, +0.5 C from the station mean2005: 11.9 C, -0.2 C from the station mean2006: 12.5 C, +0.3 C from the station mean2007: 11.8 C, -0.4 C from the station mean2008: 11.7 C, -0.5 C from the station mean2009: 11.8 C, -0.4 C from the station mean2010: 12.2 C, 0.0 C from the station mean2011: 11.5 C, -0.7 C from the station mean2012: 12.2 C, 0.0 C from the station mean2013: 11.8 C, -0.4 C from the station mean2014: 13.6 C, +1.4 C from the station mean2015: 13.3 C, +1.1 C from the station mean2016: 12.7 C, +0.5 C from the station mean2017: 12.3 C, +0.1 C from the station mean2018: 12.3 C, +0.1 C from the station mean2019: 11.8 C, -0.4 C from the station mean2020: 12.5 C, +0.3 C from the station mean2021: 12.7 C, +0.6 C from the station mean2022: 12.2 C, 0.0 C from the station mean2023: 12.1 C, -0.1 C from the station mean2024: 12.8 C, +0.6 C from the station mean2025: 13.0 C, +0.9 C from the station mean198719901995200020052010201520202025
One stripe for each of 35 complete years at Illinois Valley Airport Oregon, 1987 to 2025. Blue stripes are years cooler than the station's own mean of 12.2 C (53.9 F); red stripes are warmer. The coolest year was 1993, at 10.6 C (51.1 F), and the warmest was 2014, at 13.6 C (56.5 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Illinois Valley Airport Oregon as warming stripes, 1987 to 2025
YearAnnual mean temperatureDifference from the station mean
198711.7 C-0.44 C
199011.4 C-0.74 C
199212.7 C+0.48 C
199310.6 C-1.56 C
199411.5 C-0.64 C
199512.4 C+0.26 C
199612.4 C+0.24 C
199811.9 C-0.26 C
199911.3 C-0.85 C
200011.9 C-0.31 C
200112.2 C+0.04 C
200212.3 C+0.10 C
200312.7 C+0.50 C
200412.7 C+0.47 C
200511.9 C-0.24 C
200612.5 C+0.32 C
200711.8 C-0.37 C
200811.7 C-0.47 C
200911.8 C-0.40 C
201012.2 C-0.03 C
201111.5 C-0.67 C
201212.2 C0.00 C
201311.8 C-0.35 C
201413.6 C+1.42 C
201513.3 C+1.11 C
201612.7 C+0.50 C
201712.3 C+0.08 C
201812.3 C+0.07 C
201911.8 C-0.37 C
202012.5 C+0.32 C
202112.7 C+0.56 C
202212.2 C0.00 C
202312.1 C-0.12 C
202412.8 C+0.61 C
202513.0 C+0.86 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.4) per decade over 1987 to 2025. In Fahrenheit: 0.4 F (0.1 to 0.8) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Illinois Valley Airport Oregon
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.1 to 0.4) per decade0.4 F (0.1 to 0.8) per decade1987 to 202535Rise
Mean daily maximum0.22 C (-0.01 to 0.45) per decade0.40 F (-0.01 to 0.81) per decade1987 to 202535Not clearly different from zero
Mean daily minimum0.3 C (0.1 to 0.5) per decade0.5 F (0.1 to 0.8) per decade1987 to 202535Rise

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 Illinois Valley Airport Oregon: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.0 C (113.0 F)202441.3 C (106.3 F)42
Coldest night (TNn)-20.2 C (-4.4 F)1989-8.3 C (17.1 F)42

Hottest day (TXx)

Hottest day (TXx) at Illinois Valley Airport Oregon by year The hottest day of the year at Illinois Valley Airport Oregon, 1985 to 2026. The record is 45.0 C (113.0 F) in 2024, marked on the chart; the median year is 41.3 C (106.3 F). 38404244461990200020102020Record: 45.0 C (113.0 F) in 2024
The hottest day of the year at Illinois Valley Airport Oregon, 1985 to 2026. The record is 45.0 C (113.0 F) in 2024, marked on the chart; the median year is 41.3 C (106.3 F).
Hottest day (TXx) at Illinois Valley Airport Oregon by year
YearHottest day (TXx)
198540.6 C (105.1 F)
198641.4 C (106.5 F)
198741.8 C (107.2 F)
198842.6 C (108.7 F)
198938.6 C (101.5 F)
199041.0 C (105.8 F)
199140.6 C (105.1 F)
199242.9 C (109.2 F)
199339.8 C (103.6 F)
199442.2 C (108.0 F)
199538.3 C (100.9 F)
199641.7 C (107.1 F)
199739.4 C (102.9 F)
199843.3 C (109.9 F)
199938.9 C (102.0 F)
200038.9 C (102.0 F)
200140.6 C (105.1 F)
200242.8 C (109.0 F)
200344.4 C (111.9 F)
200441.1 C (106.0 F)
200541.1 C (106.0 F)
200643.9 C (111.0 F)
200740.0 C (104.0 F)
200842.8 C (109.0 F)
200943.3 C (109.9 F)
201041.1 C (106.0 F)
201138.3 C (100.9 F)
201241.1 C (106.0 F)
201342.2 C (108.0 F)
201441.1 C (106.0 F)
201542.2 C (108.0 F)
201642.8 C (109.0 F)
201742.2 C (108.0 F)
201840.0 C (104.0 F)
201940.6 C (105.1 F)
202040.6 C (105.1 F)
202144.4 C (111.9 F)
202243.3 C (109.9 F)
202343.3 C (109.9 F)
202445.0 C (113.0 F)
202542.2 C (108.0 F)
202641.1 C (106.0 F)

Coldest night (TNn)

Coldest night (TNn) at Illinois Valley Airport Oregon by year The coldest night of the year at Illinois Valley Airport Oregon, 1985 to 2026. The record is -20.2 C (-4.4 F) in 1989, marked on the chart; the median year is -8.3 C (17.1 F). -25-20-15-10-51990200020102020Record: -20.2 C (-4.4 F) in 1989
The coldest night of the year at Illinois Valley Airport Oregon, 1985 to 2026. The record is -20.2 C (-4.4 F) in 1989, marked on the chart; the median year is -8.3 C (17.1 F).
Coldest night (TNn) at Illinois Valley Airport Oregon by year
YearColdest night (TNn)
1985-8.1 C (17.4 F)
1986-8.1 C (17.4 F)
1987-9.6 C (14.7 F)
1988-8.4 C (16.9 F)
1989-20.2 C (-4.4 F)
1990-18.2 C (-0.8 F)
1991-10.8 C (12.6 F)
1992-7.3 C (18.9 F)
1993-10.8 C (12.6 F)
1994-8.9 C (16.0 F)
1995-6.7 C (19.9 F)
1996-6.7 C (19.9 F)
1997-6.1 C (21.0 F)
1998-16.1 C (3.0 F)
1999-6.1 C (21.0 F)
2000-5.6 C (21.9 F)
2001-7.2 C (19.0 F)
2002-12.8 C (9.0 F)
2003-8.3 C (17.1 F)
2004-6.1 C (21.0 F)
2005-6.7 C (19.9 F)
2006-9.4 C (15.1 F)
2007-11.1 C (12.0 F)
2008-8.3 C (17.1 F)
2009-12.8 C (9.0 F)
2010-5.0 C (23.0 F)
2011-8.9 C (16.0 F)
2012-7.2 C (19.0 F)
2013-12.2 C (10.0 F)
2014-8.3 C (17.1 F)
2015-10.0 C (14.0 F)
2016-9.4 C (15.1 F)
2017-12.2 C (10.0 F)
2018-7.2 C (19.0 F)
2019-7.2 C (19.0 F)
2020-7.2 C (19.0 F)
2021-6.7 C (19.9 F)
2022-9.4 C (15.1 F)
2023-9.4 C (15.1 F)
2024-5.0 C (23.0 F)
2025-10.0 C (14.0 F)
2026-7.8 C (18.0 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

35 years with a frost

Across 35 years with a frost, the median last spring frost at Illinois Valley Airport Oregon falls on 9 May and the median first autumn frost on 7 October, which leaves a median of 153 days between them.

Fitted over all years, the growing season changes by +7.3 days per decade at this station.

Frost dates and growing season at Illinois Valley Airport Oregon
MeasureMedian, all yearsEarliest periodRecent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost9 Mayn/a10 Mayn/a-1.7 days per decade
First autumn frost7 Octobern/a9 Octobern/a+5.6 days per decade
Growing days153 daysn/a155 daysn/a+7.3 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 Illinois Valley Airport Oregon standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Illinois Valley Airport 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). Records are computed by this site and are not official.

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