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Portland WFO Weather Records (USC00356750)

Record envelope, standing records and threshold days for Portland WFO (USC00356750), Oregon, United States, with 31 years of record.

Key Facts for Portland WFO

  • Portland WFO (USC00356750) is a weather station in Oregon, United States at 45.56 latitude and -122.54 longitude, 6 m (21 ft) above sea level.
  • The station reports from 1996 to 2026, 31 years of record.
  • 1,464 records set at Portland WFO still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Portland WFO set a daily record high maximum temperature of 28.3 C (82.9 F) on 4 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, 45.56 latitude, -122.54 longitude.
  • Elevation: 6 m (21 ft).
  • Period of record: 1996 to 2026, 31 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

25 days at or beyond a record
Daily record high and record low at Portland WFO, with 2026 drawn through them The band shows the record high and record low for each calendar day at Portland WFO. The lines show the 2026 daily maximum and minimum. 25 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Portland WFO. The lines show the 2026 daily maximum and minimum. 25 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Portland WFO, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan19.4 C (66.9 F)-11.1 C (12.0 F)16.7 C (62.1 F)-5.0 C (23.0 F)
Feb18.9 C (66.0 F)-8.3 C (17.1 F)14.4 C (57.9 F)-0.6 C (30.9 F)
Mar27.2 C (81.0 F)-3.3 C (26.1 F)22.8 C (73.0 F)-0.6 C (30.9 F)
Apr32.2 C (90.0 F)-1.7 C (28.9 F)28.3 C (82.9 F)1.1 C (34.0 F)
May35.6 C (96.1 F)1.7 C (35.1 F)33.3 C (91.9 F)6.1 C (43.0 F)
Jun45.6 C (114.1 F)6.1 C (43.0 F)37.2 C (99.0 F)8.3 C (46.9 F)
Jul40.6 C (105.1 F)7.8 C (46.0 F)37.8 C (100.0 F)10.0 C (50.0 F)
Aug41.7 C (107.1 F)8.3 C (46.9 F)35.6 C (96.1 F)11.1 C (52.0 F)
Sep36.7 C (98.1 F)3.9 C (39.0 F)31.7 C (89.1 F)4.4 C (39.9 F)
Oct30.6 C (87.1 F)-2.2 C (28.0 F)28.3 C (82.9 F)4.4 C (39.9 F)
Nov21.7 C (71.1 F)-8.9 C (16.0 F)n/an/a
Dec17.8 C (64.0 F)-10.0 C (14.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Portland WFO by the year they were set 1,464 records at Portland WFO still stand. 2008 holds the most, with 85. 02550751001996: 591997: 391998: 511999: 552000: 342001: 432002: 582003: 642004: 412005: 512006: 422007: 402008: 852009: 472010: 622011: 472012: 442013: 532014: 592015: 532016: 512017: 372018: 402019: 402020: 362021: 542022: 412023: 482024: 392025: 322026: 1919962000200420082012201620202024
1,464 records at Portland WFO still stand. 2008 holds the most, with 85.
Standing records at Portland WFO by the year they were set
Year setStanding records
199659
199739
199851
199955
200034
200143
200258
200364
200441
200551
200642
200740
200885
200947
201062
201147
201244
201353
201459
201553
201651
201737
201840
201940
202036
202154
202241
202348
202439
202532
202619

Wettest Day of Each Month

Dec: 80.5 mm (3.2 in)
Record daily precipitation for each month at Portland WFO The wettest day on record for each calendar month at Portland WFO. The most was 80.5 mm (3.2 in) on 7 December 2015. 0255075100 Jan: 68.8 mm (2.7 in), 1 January 2009 Jan Feb: 59.2 mm (2.3 in), 5 February 2017 Feb Mar: 50.3 mm (2.0 in), 12 March 2026 Mar Apr: 37.6 mm (1.5 in), 7 April 2018 Apr May: 32.3 mm (1.3 in), 31 May 1997 May Jun: 45.0 mm (1.8 in), 10 June 2022 Jun Jul: 18.5 mm (0.7 in), 17 July 2011 Jul Aug: 26.2 mm (1.0 in), 22 August 2004 Aug Sep: 53.1 mm (2.1 in), 14 September 1996 Sep Oct: 74.2 mm (2.9 in), 31 October 2015 Oct Nov: 74.9 mm (2.9 in), 19 November 1996 Nov Dec: 80.5 mm (3.2 in), 7 December 2015 Dec
The wettest day on record for each calendar month at Portland WFO. The most was 80.5 mm (3.2 in) on 7 December 2015.
Record daily precipitation for each month at Portland WFO
MonthRecord daily precipitation (mm)Date
Jan68.8 mm (2.7 in)1 January 2009
Feb59.2 mm (2.3 in)5 February 2017
Mar50.3 mm (2.0 in)12 March 2026
Apr37.6 mm (1.5 in)7 April 2018
May32.3 mm (1.3 in)31 May 1997
Jun45.0 mm (1.8 in)10 June 2022
Jul18.5 mm (0.7 in)17 July 2011
Aug26.2 mm (1.0 in)22 August 2004
Sep53.1 mm (2.1 in)14 September 1996
Oct74.2 mm (2.9 in)31 October 2015
Nov74.9 mm (2.9 in)19 November 1996
Dec80.5 mm (3.2 in)7 December 2015

Period of Record Coverage

1996 to 2026
Days with data per year at Portland WFO 31 years of record at Portland WFO, 1996 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1996, 2026. 1996: 275 of 366 days1997: 364 of 365 days1998: 365 of 365 days1999: 363 of 365 days2000: 365 of 366 days2001: 361 of 365 days2002: 364 of 365 days2003: 363 of 365 days2004: 365 of 366 days2005: 363 of 365 days2006: 334 of 365 days2007: 364 of 365 days2008: 365 of 366 days2009: 362 of 365 days2010: 361 of 365 days2011: 364 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 365 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: 363 of 365 days2026: 284 of 365 days200020052010201520202025
31 years of record at Portland WFO, 1996 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1996, 2026.
Days with data per year at Portland WFO
YearDays with dataShare of yearComplete
199627575%No
1997364100%Yes
1998365100%Yes
199936399%Yes
2000365100%Yes
200136199%Yes
2002364100%Yes
200336399%Yes
2004365100%Yes
200536399%Yes
200633492%Yes
2007364100%Yes
2008365100%Yes
200936299%Yes
201036199%Yes
2011364100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
202536399%Yes
202628478%No

Latest Records

20
Latest records at Portland WFO
DateStationRecordValueBeat old record byOld record stoodSignificance
4 October 2026Portland WFO, USdaily high max (Provisional)28.3 C (82.9 F)0.5 C (0.9 F)12 years7 of 100 (Routine)
3 October 2026Portland WFO, USdaily high max (Tie, Provisional)27.2 C (81.0 F)tie4 years1 of 100 (Routine)
26 September 2026Portland WFO, USdaily low min (Provisional)4.4 C (39.9 F)2.8 C (5.0 F)29 years21 of 100 (Routine)
17 September 2026Portland WFO, USdaily low min (Provisional)8.3 C (46.9 F)0.6 C (1.1 F)8 years7 of 100 (Routine)
15 September 2026Portland WFO, USdaily low min (Provisional)7.8 C (46.0 F)0.5 C (0.9 F)0 years4 of 100 (Routine)
4 September 2026Portland WFO, USdaily rain (Provisional)6.9 mm (0.27 in)0.3 mm (0.01 in)19 years8 of 100 (Routine)
3 September 2026Portland WFO, USdaily low max (Provisional)17.8 C (64.0 F)1.6 C (2.9 F)25 years13 of 100 (Routine)
3 September 2026Portland WFO, USdaily rain (Provisional)3.0 mm (0.12 in)1.2 mm (0.05 in)12 years7 of 100 (Routine)
2 September 2026Portland WFO, USdaily rain (Provisional)7.4 mm (0.29 in)0.8 mm (0.03 in)11 years7 of 100 (Routine)
6 August 2026Portland WFO, USdaily high max35.6 C (96.1 F)1.7 C (3.1 F)4 years7 of 100 (Routine)
21 July 2026Portland WFO, USdaily high max37.8 C (100.0 F)3.4 C (6.1 F)20 years16 of 100 (Routine)
10 July 2026Portland WFO, USdaily low min (Tie)11.7 C (53.1 F)tie29 years2 of 100 (Routine)
30 June 2026Portland WFO, USdaily low max (Tie)19.4 C (66.9 F)tie28 years2 of 100 (Routine)
25 June 2026Portland WFO, USdaily rain8.6 mm (0.34 in)1.0 mm (0.04 in)28 years12 of 100 (Routine)
23 June 2026Portland WFO, USdaily high max35.0 C (95.0 F)0.6 C (1.1 F)5 years5 of 100 (Routine)
22 June 2026Portland WFO, USdaily high max33.9 C (93.0 F)1.1 C (2.0 F)21 years11 of 100 (Routine)
15 June 2026Portland WFO, USdaily high min16.1 C (61.0 F)2.8 C (5.0 F)28 years22 of 100 (Routine)
15 June 2026Portland WFO, USdaily high max37.2 C (99.0 F)4.4 C (7.9 F)11 years14 of 100 (Routine)
31 May 2026Portland WFO, USdaily low min (Tie)7.2 C (45.0 F)tie29 years2 of 100 (Routine)
30 May 2026Portland WFO, USdaily low min6.1 C (43.0 F)0.6 C (1.1 F)27 years13 of 100 (Routine)

Climate Trend

28 complete years, 1997 to 2025
Annual mean temperature at Portland WFO as warming stripes, 1997 to 2025 One stripe for each of 28 complete years at Portland WFO, 1997 to 2025. Blue stripes are years cooler than the station's own mean of 12.5 C (54.6 F); red stripes are warmer. The coolest year was 2011, at 11.3 C (52.4 F), and the warmest was 2015, at 13.9 C (56.9 F). The strongest colour marks a difference of 1.4 C (2.5 F). 1997: 13.0 C, +0.4 C from the station mean1998: 12.7 C, +0.1 C from the station mean1999: 12.2 C, -0.4 C from the station mean2000: 11.9 C, -0.6 C from the station mean2001: 12.2 C, -0.4 C from the station mean2002: 12.6 C, 0.0 C from the station mean2003: 13.2 C, +0.6 C from the station mean2004: 13.1 C, +0.6 C from the station mean2005: 12.6 C, 0.0 C from the station mean2007: 11.9 C, -0.6 C from the station mean2008: 11.6 C, -0.9 C from the station mean2009: 12.0 C, -0.5 C from the station mean2010: 12.2 C, -0.3 C from the station mean2011: 11.3 C, -1.2 C from the station mean2012: 12.1 C, -0.4 C from the station mean2013: 12.2 C, -0.3 C from the station mean2014: 13.1 C, +0.6 C from the station mean2015: 13.9 C, +1.3 C from the station mean2016: 13.2 C, +0.7 C from the station mean2017: 12.2 C, -0.4 C from the station mean2018: 13.1 C, +0.5 C from the station mean2019: 12.1 C, -0.4 C from the station mean2020: 12.8 C, +0.3 C from the station mean2021: 12.9 C, +0.3 C from the station mean2022: 12.4 C, -0.2 C from the station mean2023: 12.8 C, +0.2 C from the station mean2024: 12.8 C, +0.3 C from the station mean2025: 13.2 C, +0.7 C from the station mean1997200020052010201520202025
One stripe for each of 28 complete years at Portland WFO, 1997 to 2025. Blue stripes are years cooler than the station's own mean of 12.5 C (54.6 F); red stripes are warmer. The coolest year was 2011, at 11.3 C (52.4 F), and the warmest was 2015, at 13.9 C (56.9 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Portland WFO as warming stripes, 1997 to 2025
YearAnnual mean temperatureDifference from the station mean
199713.0 C+0.43 C
199812.7 C+0.15 C
199912.2 C-0.39 C
200011.9 C-0.61 C
200112.2 C-0.35 C
200212.6 C+0.02 C
200313.2 C+0.63 C
200413.1 C+0.56 C
200512.6 C+0.03 C
200711.9 C-0.62 C
200811.6 C-0.91 C
200912.0 C-0.54 C
201012.2 C-0.33 C
201111.3 C-1.22 C
201212.1 C-0.40 C
201312.2 C-0.32 C
201413.1 C+0.59 C
201513.9 C+1.31 C
201613.2 C+0.68 C
201712.2 C-0.36 C
201813.1 C+0.51 C
201912.1 C-0.44 C
202012.8 C+0.30 C
202112.9 C+0.34 C
202212.4 C-0.16 C
202312.8 C+0.24 C
202412.8 C+0.26 C
202513.2 C+0.66 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1996 to 2026
Yearly extremes at Portland WFO: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.6 C (114.1 F)202138.3 C (100.9 F)31
Coldest night (TNn)-11.1 C (12.0 F)2024-5.0 C (23.0 F)31
Wettest day (Rx1day)80.5 mm (3.2 in)201547.8 mm (1.9 in)31
Wettest five days (Rx5day)179.1 mm (7.1 in)2006107.4 mm (4.2 in)31
Longest dry spell (CDD)93 days202139 days31

Hottest day (TXx)

Hottest day (TXx) at Portland WFO by year The hottest day of the year at Portland WFO, 1996 to 2026. The record is 45.6 C (114.1 F) in 2021, marked on the chart; the median year is 38.3 C (100.9 F). 3035404550200020052010201520202025Record: 45.6 C (114.1 F) in 2021
The hottest day of the year at Portland WFO, 1996 to 2026. The record is 45.6 C (114.1 F) in 2021, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Portland WFO by year
YearHottest day (TXx)
199637.8 C (100.0 F)
199735.0 C (95.0 F)
199838.9 C (102.0 F)
199933.9 C (93.0 F)
200036.7 C (98.1 F)
200137.2 C (99.0 F)
200239.4 C (102.9 F)
200338.3 C (100.9 F)
200439.4 C (102.9 F)
200536.1 C (97.0 F)
200640.6 C (105.1 F)
200739.4 C (102.9 F)
200838.9 C (102.0 F)
200940.6 C (105.1 F)
201036.7 C (98.1 F)
201136.1 C (97.0 F)
201237.8 C (100.0 F)
201336.7 C (98.1 F)
201437.2 C (99.0 F)
201540.0 C (104.0 F)
201638.3 C (100.9 F)
201740.0 C (104.0 F)
201837.2 C (99.0 F)
201936.7 C (98.1 F)
202037.2 C (99.0 F)
202145.6 C (114.1 F)
202238.9 C (102.0 F)
202341.7 C (107.1 F)
202439.4 C (102.9 F)
202538.3 C (100.9 F)
202637.8 C (100.0 F)

Coldest night (TNn)

Coldest night (TNn) at Portland WFO by year The coldest night of the year at Portland WFO, 1996 to 2026. The record is -11.1 C (12.0 F) in 2024, marked on the chart; the median year is -5.0 C (23.0 F). -12.5-10-7.5-5-2.50200020052010201520202025Record: -11.1 C (12.0 F) in 2024
The coldest night of the year at Portland WFO, 1996 to 2026. The record is -11.1 C (12.0 F) in 2024, marked on the chart; the median year is -5.0 C (23.0 F).
Coldest night (TNn) at Portland WFO by year
YearColdest night (TNn)
1996-2.8 C (27.0 F)
1997-3.9 C (25.0 F)
1998-8.9 C (16.0 F)
1999-2.2 C (28.0 F)
2000-3.3 C (26.1 F)
2001-3.3 C (26.1 F)
2002-2.2 C (28.0 F)
2003-2.8 C (27.0 F)
2004-8.9 C (16.0 F)
2005-3.9 C (25.0 F)
2006-5.6 C (21.9 F)
2007-6.7 C (19.9 F)
2008-8.3 C (17.1 F)
2009-9.4 C (15.1 F)
2010-8.9 C (16.0 F)
2011-7.8 C (18.0 F)
2012-2.8 C (27.0 F)
2013-10.0 C (14.0 F)
2014-8.3 C (17.1 F)
2015-3.3 C (26.1 F)
2016-4.4 C (24.1 F)
2017-7.8 C (18.0 F)
2018-5.0 C (23.0 F)
2019-5.0 C (23.0 F)
2020-2.2 C (28.0 F)
2021-6.1 C (21.0 F)
2022-8.3 C (17.1 F)
2023-7.8 C (18.0 F)
2024-11.1 C (12.0 F)
2025-4.4 C (24.1 F)
2026-5.0 C (23.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Portland WFO by year The wettest day of the year at Portland WFO, 1996 to 2026. The record is 80.5 mm (3.2 in) in 2015, marked on the chart; the median year is 47.8 mm (1.9 in). 20406080100200020052010201520202025Record: 80.5 mm (3.2 in) in 2015
The wettest day of the year at Portland WFO, 1996 to 2026. The record is 80.5 mm (3.2 in) in 2015, marked on the chart; the median year is 47.8 mm (1.9 in).
Wettest day (Rx1day) at Portland WFO by year
YearWettest day (Rx1day)
199674.9 mm (2.9 in)
199752.1 mm (2.1 in)
199852.3 mm (2.1 in)
199938.9 mm (1.5 in)
200027.9 mm (1.1 in)
200124.1 mm (0.9 in)
200237.6 mm (1.5 in)
200348.8 mm (1.9 in)
200426.9 mm (1.1 in)
200541.9 mm (1.6 in)
200659.7 mm (2.4 in)
200749.8 mm (2.0 in)
200842.4 mm (1.7 in)
200968.8 mm (2.7 in)
201044.2 mm (1.7 in)
201157.1 mm (2.2 in)
201257.7 mm (2.3 in)
201337.6 mm (1.5 in)
201442.7 mm (1.7 in)
201580.5 mm (3.2 in)
201647.8 mm (1.9 in)
201759.2 mm (2.3 in)
201837.6 mm (1.5 in)
201930.0 mm (1.2 in)
202040.6 mm (1.6 in)
202149.5 mm (1.9 in)
202251.8 mm (2.0 in)
202337.6 mm (1.5 in)
202426.9 mm (1.1 in)
202556.4 mm (2.2 in)
202650.3 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Portland WFO by year The wettest five days of the year at Portland WFO, 1996 to 2026. The record is 179.1 mm (7.1 in) in 2006, marked on the chart; the median year is 107.4 mm (4.2 in). 50100150200200020052010201520202025Record: 179.1 mm (7.1 in) in 2006
The wettest five days of the year at Portland WFO, 1996 to 2026. The record is 179.1 mm (7.1 in) in 2006, marked on the chart; the median year is 107.4 mm (4.2 in).
Wettest five days (Rx5day) at Portland WFO by year
YearWettest five days (Rx5day)
1996146.3 mm (5.8 in)
1997144.5 mm (5.7 in)
1998114.6 mm (4.5 in)
199987.6 mm (3.4 in)
200073.4 mm (2.9 in)
200199.6 mm (3.9 in)
200296.3 mm (3.8 in)
2003114.1 mm (4.5 in)
200464.5 mm (2.5 in)
2005103.1 mm (4.1 in)
2006179.1 mm (7.1 in)
2007114.3 mm (4.5 in)
200868.8 mm (2.7 in)
2009116.6 mm (4.6 in)
2010107.4 mm (4.2 in)
201197.7 mm (3.8 in)
2012125.0 mm (4.9 in)
201399.6 mm (3.9 in)
201470.9 mm (2.8 in)
2015165.3 mm (6.5 in)
2016120.0 mm (4.7 in)
2017116.4 mm (4.6 in)
201879.0 mm (3.1 in)
201961.9 mm (2.4 in)
202065.5 mm (2.6 in)
202194.5 mm (3.7 in)
2022119.9 mm (4.7 in)
2023122.5 mm (4.8 in)
202469.8 mm (2.7 in)
2025112.8 mm (4.4 in)
2026112.6 mm (4.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Portland WFO by year The longest dry spell of the year at Portland WFO, 1996 to 2026. The record is 93 days in 2021, marked on the chart; the median year is 39 days. 20406080100200020052010201520202025Record: 93 days in 2021
The longest dry spell of the year at Portland WFO, 1996 to 2026. The record is 93 days in 2021, marked on the chart; the median year is 39 days.
Longest dry spell (CDD) at Portland WFO by year
YearLongest dry spell (CDD)
199630 days
199740 days
199848 days
199922 days
200026 days
200133 days
200241 days
200377 days
200434 days
200538 days
200647 days
200728 days
200834 days
200929 days
201059 days
201133 days
201251 days
201359 days
201437 days
201539 days
201623 days
201757 days
201885 days
201929 days
202029 days
202193 days
202267 days
202372 days
202441 days
202528 days
202641 days

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

28 years with a frost

Across 28 years with a frost, the median last spring frost at Portland WFO falls on 21 March and the median first autumn frost on 19 November, which leaves a median of 247 days between them.

Fitted over all years, the growing season changes by -2.7 days per decade at this station.

Frost dates and growing season at Portland WFO
MeasureMedian, all yearsEarliest periodRecent period (1997 to 2025)Recent against earliestFitted trend
Last spring frost21 Marchn/a21 Marchn/a-1.4 days per decade
First autumn frost19 Novembern/a19 Novembern/a-4.1 days per decade
Growing days247 daysn/a247 daysn/a-2.7 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 Portland WFO standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Portland WFO 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

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