Built 2026-10-19 (19 October 2026)

Derr. Weather Records (USS0019E03S)

Record envelope, standing records and threshold days for Derr. (USS0019E03S), Oregon, United States, with 47 years of record.

Key Facts for Derr.

  • Derr. (USS0019E03S) is a weather station in Oregon, United States at 44.45 latitude and -119.93 longitude, 1,783 m (5,850 ft) above sea level.
  • The station reports from 1980 to 2026, 47 years of record.
  • 1,464 records set at Derr. still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Derr. set a daily record low maximum temperature of -1.0 C (30.2 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, 44.45 latitude, -119.93 longitude.
  • Elevation: 1,783 m (5,850 ft).
  • Period of record: 1980 to 2026, 47 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

12 days at or beyond a record
Daily record high and record low at Derr., with 2026 drawn through them The band shows the record high and record low for each calendar day at Derr.. The lines show the 2026 daily maximum and minimum. 12 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 Derr.. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Derr., with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan15.2 C (59.4 F)-22.1 C (-7.8 F)11.5 C (52.7 F)-13.2 C (8.2 F)
Feb17.5 C (63.5 F)-21.9 C (-7.4 F)14.1 C (57.4 F)-12.4 C (9.7 F)
Mar19.9 C (67.8 F)-18.2 C (-0.8 F)19.9 C (67.8 F)-9.3 C (15.3 F)
Apr23.1 C (73.6 F)-14.5 C (5.9 F)18.1 C (64.6 F)-8.8 C (16.2 F)
May27.6 C (81.7 F)-10.2 C (13.6 F)25.0 C (77.0 F)-3.9 C (25.0 F)
Jun34.8 C (94.6 F)-5.8 C (21.6 F)26.1 C (79.0 F)-2.6 C (27.3 F)
Jul35.7 C (96.3 F)-3.2 C (26.2 F)30.2 C (86.4 F)0.8 C (33.4 F)
Aug35.3 C (95.5 F)-1.9 C (28.6 F)31.7 C (89.1 F)-0.6 C (30.9 F)
Sep34.2 C (93.6 F)-7.4 C (18.7 F)24.1 C (75.4 F)-1.3 C (29.7 F)
Oct27.8 C (82.0 F)-16.5 C (2.3 F)25.4 C (77.7 F)-4.2 C (24.4 F)
Nov20.2 C (68.4 F)-22.2 C (-8.0 F)n/an/a
Dec14.9 C (58.8 F)-28.5 C (-19.3 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Derr. by the year they were set 1,464 records at Derr. still stand. 1996 holds the most, with 72. 0204060801989: 31990: 301991: 241992: 481993: 501994: 361995: 381996: 721997: 241998: 301999: 652000: 342001: 352002: 552003: 372004: 302005: 332006: 392007: 402008: 582009: 442010: 332011: 322012: 342013: 482014: 282015: 522016: 432017: 482018: 192019: 362020: 272021: 422022: 682023: 362024: 262025: 442026: 231989199319972001200520092013201720212025
1,464 records at Derr. still stand. 1996 holds the most, with 72.
Standing records at Derr. by the year they were set
Year setStanding records
19893
199030
199124
199248
199350
199436
199538
199672
199724
199830
199965
200034
200135
200255
200337
200430
200533
200639
200740
200858
200944
201033
201132
201234
201348
201428
201552
201643
201748
201819
201936
202027
202142
202268
202336
202426
202544
202623

All-Time Record Progression

1 new records
When Derr. set new all-time records 1 all-time records were set at Derr. between 29 June 2021 and 29 June 2021. Each dot is a new record. Record high minimum temperature29 June 2021: Record high minimum temperature 21.7 C (71.1 F)
1 all-time records were set at Derr. between 29 June 2021 and 29 June 2021. Each dot is a new record.
When Derr. set new all-time records
DateKindDetail
2021-06-29Record high minimum temperatureRecord high minimum temperature 21.7 C (71.1 F)

Wettest Day of Each Month

Aug: 86.4 mm (3.4 in)
Record daily precipitation for each month at Derr. The wettest day on record for each calendar month at Derr.. The most was 86.4 mm (3.4 in) on 30 August 1984. 0255075100 Jan: 55.9 mm (2.2 in), 3 January 1982 Jan Feb: 43.2 mm (1.7 in), 24 February 2019 Feb Mar: 38.1 mm (1.5 in), 3 March 1983 Mar Apr: 33.0 mm (1.3 in), 25 April 1989 Apr May: 53.3 mm (2.1 in), 18 May 2004 May Jun: 27.9 mm (1.1 in), 5 June 2007 Jun Jul: 22.9 mm (0.9 in), 21 July 1987 Jul Aug: 86.4 mm (3.4 in), 30 August 1984 Aug Sep: 35.6 mm (1.4 in), 29 September 2013 Sep Oct: 53.3 mm (2.1 in), 10 October 2000 Oct Nov: 58.4 mm (2.3 in), 18 November 1996 Nov Dec: 45.7 mm (1.8 in), 30 December 2005 Dec
The wettest day on record for each calendar month at Derr.. The most was 86.4 mm (3.4 in) on 30 August 1984.
Record daily precipitation for each month at Derr.
MonthRecord daily precipitation (mm)Date
Jan55.9 mm (2.2 in)3 January 1982
Feb43.2 mm (1.7 in)24 February 2019
Mar38.1 mm (1.5 in)3 March 1983
Apr33.0 mm (1.3 in)25 April 1989
May53.3 mm (2.1 in)18 May 2004
Jun27.9 mm (1.1 in)5 June 2007
Jul22.9 mm (0.9 in)21 July 1987
Aug86.4 mm (3.4 in)30 August 1984
Sep35.6 mm (1.4 in)29 September 2013
Oct53.3 mm (2.1 in)10 October 2000
Nov58.4 mm (2.3 in)18 November 1996
Dec45.7 mm (1.8 in)30 December 2005

Period of Record Coverage

1989 to 2026
Days with data per year at Derr. 38 years of record at Derr., 1989 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1989, 1990, 2026. 1989: 121 of 365 days1990: 321 of 365 days1991: 348 of 365 days1992: 362 of 366 days1993: 343 of 365 days1994: 346 of 365 days1995: 363 of 365 days1996: 365 of 366 days1997: 364 of 365 days1998: 364 of 365 days1999: 364 of 365 days2000: 365 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 364 of 365 days2004: 365 of 366 days2005: 360 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: 366 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 362 of 366 days2021: 363 of 365 days2022: 365 of 365 days2023: 363 of 365 days2024: 366 of 366 days2025: 360 of 365 days2026: 287 of 365 days19901995200020052010201520202025
38 years of record at Derr., 1989 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1989, 1990, 2026.
Days with data per year at Derr.
YearDays with dataShare of yearComplete
198912133%No
199032188%No
199134895%Yes
199236299%Yes
199334394%Yes
199434695%Yes
199536399%Yes
1996365100%Yes
1997364100%Yes
1998364100%Yes
1999364100%Yes
2000365100%Yes
2001365100%Yes
2002365100%Yes
2003364100%Yes
2004365100%Yes
200536099%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
202036299%Yes
202136399%Yes
2022365100%Yes
202336399%Yes
2024366100%Yes
202536099%Yes
202628779%No

Latest Records

20
Latest records at Derr.
DateStationRecordValueBeat old record byOld record stoodSignificance
11 October 2026Derr., USdaily low max (Provisional)-1.0 C (30.2 F)1.0 C (1.8 F)17 years9 of 100 (Routine)
8 October 2026Derr., USdaily high min (Provisional)10.0 C (50.0 F)0.3 C (0.5 F)29 years11 of 100 (Routine)
7 October 2026Derr., USdaily high max (Provisional)25.4 C (77.7 F)1.4 C (2.5 F)12 years8 of 100 (Routine)
7 October 2026Derr., USdaily high min (Provisional)11.8 C (53.2 F)1.1 C (2.0 F)4 years6 of 100 (Routine)
5 October 2026Derr., USdaily high min (Provisional)9.3 C (48.7 F)0.3 C (0.5 F)12 years6 of 100 (Routine)
4 October 2026Derr., USdaily high max (Provisional)25.4 C (77.7 F)2.5 C (4.5 F)4 years8 of 100 (Routine)
4 October 2026Derr., USdaily high min (Provisional)9.8 C (49.6 F)0.4 C (0.7 F)4 years4 of 100 (Routine)
12 September 2026Derr., USdaily rain (Tie, Provisional)10.2 mm (0.4 in)tie44 years4 of 100 (Routine)
6 September 2026Derr., USdaily rain (Provisional)5.1 mm (0.20 in)2.6 mm (0.10 in)41 years20 of 100 (Routine)
6 September 2026Derr., USdaily low max (Provisional)9.5 C (49.1 F)0.1 C (0.2 F)33 years13 of 100 (Routine)
4 September 2026Derr., USdaily rain (Tie, Provisional)5.1 mm (0.20 in)tie11 years1 of 100 (Routine)
3 September 2026Derr., USdaily low max (Provisional)6.7 C (44.1 F)0.5 C (0.9 F)25 years10 of 100 (Routine)
2 September 2026Derr., USdaily rain (Provisional)10.2 mm (0.4 in)2.6 mm (0.10 in)25 years16 of 100 (Routine)
21 August 2026Derr., USdaily high min (Provisional)17.2 C (63.0 F)2.9 C (5.2 F)15 years14 of 100 (Routine)
21 August 2026Derr., USdaily high max (Tie, Provisional)30.2 C (86.4 F)tie20 years2 of 100 (Routine)
6 August 2026Derr., USdaily high max31.3 C (88.3 F)1.1 C (2.0 F)7 years7 of 100 (Routine)
27 June 2026Derr., USdaily low max8.6 C (47.5 F)2.0 C (3.6 F)20 years12 of 100 (Routine)
16 June 2026Derr., USdaily high max25.1 C (77.2 F)1.6 C (2.9 F)24 years12 of 100 (Routine)
28 May 2026Derr., USdaily rain (Tie)17.8 mm (0.7 in)tie17 years2 of 100 (Routine)
12 May 2026Derr., USdaily high max25.0 C (77.0 F)0.7 C (1.3 F)28 years12 of 100 (Routine)

Climate Trend

34 complete years, 1992 to 2025
Annual mean temperature at Derr. as warming stripes, 1992 to 2025 One stripe for each of 34 complete years at Derr., 1992 to 2025. Blue stripes are years cooler than the station's own mean of 5.2 C (41.4 F); red stripes are warmer. The coolest year was 1993, at 3.8 C (38.8 F), and the warmest was 2015, at 6.8 C (44.2 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1992: 5.7 C, +0.5 C from the station mean1993: 3.8 C, -1.4 C from the station mean1994: 4.9 C, -0.4 C from the station mean1995: 4.9 C, -0.3 C from the station mean1996: 4.7 C, -0.5 C from the station mean1997: 4.8 C, -0.4 C from the station mean1998: 4.8 C, -0.5 C from the station mean1999: 4.6 C, -0.6 C from the station mean2000: 4.8 C, -0.4 C from the station mean2001: 5.0 C, -0.2 C from the station mean2002: 5.0 C, -0.3 C from the station mean2003: 5.7 C, +0.4 C from the station mean2004: 5.3 C, +0.1 C from the station mean2005: 5.2 C, 0.0 C from the station mean2006: 5.2 C, 0.0 C from the station mean2007: 5.4 C, +0.2 C from the station mean2008: 4.9 C, -0.4 C from the station mean2009: 5.2 C, -0.1 C from the station mean2010: 4.7 C, -0.5 C from the station mean2011: 4.4 C, -0.8 C from the station mean2012: 5.3 C, +0.1 C from the station mean2013: 5.3 C, +0.1 C from the station mean2014: 6.1 C, +0.9 C from the station mean2015: 6.8 C, +1.6 C from the station mean2016: 5.4 C, +0.2 C from the station mean2017: 5.5 C, +0.3 C from the station mean2018: 5.4 C, +0.1 C from the station mean2019: 4.6 C, -0.6 C from the station mean2020: 5.7 C, +0.4 C from the station mean2021: 5.8 C, +0.6 C from the station mean2022: 5.5 C, +0.3 C from the station mean2023: 5.3 C, +0.1 C from the station mean2024: 5.8 C, +0.6 C from the station mean2025: 6.1 C, +0.9 C from the station mean19921995200020052010201520202025
One stripe for each of 34 complete years at Derr., 1992 to 2025. Blue stripes are years cooler than the station's own mean of 5.2 C (41.4 F); red stripes are warmer. The coolest year was 1993, at 3.8 C (38.8 F), and the warmest was 2015, at 6.8 C (44.2 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Derr. as warming stripes, 1992 to 2025
YearAnnual mean temperatureDifference from the station mean
19925.7 C+0.53 C
19933.8 C-1.41 C
19944.9 C-0.36 C
19954.9 C-0.35 C
19964.7 C-0.52 C
19974.8 C-0.44 C
19984.8 C-0.46 C
19994.6 C-0.63 C
20004.8 C-0.45 C
20015.0 C-0.24 C
20025.0 C-0.26 C
20035.7 C+0.44 C
20045.3 C+0.13 C
20055.2 C+0.02 C
20065.2 C-0.03 C
20075.4 C+0.21 C
20084.9 C-0.36 C
20095.2 C-0.06 C
20104.7 C-0.54 C
20114.4 C-0.84 C
20125.3 C+0.07 C
20135.3 C+0.13 C
20146.1 C+0.89 C
20156.8 C+1.58 C
20165.4 C+0.18 C
20175.5 C+0.29 C
20185.4 C+0.14 C
20194.6 C-0.57 C
20205.7 C+0.44 C
20215.8 C+0.55 C
20225.5 C+0.27 C
20235.3 C+0.06 C
20245.8 C+0.57 C
20256.1 C+0.89 C

The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1992 to 2025. In Fahrenheit: 0.6 F (0.2 to 0.9) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Derr.
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.1 to 0.5) per decade0.6 F (0.2 to 0.9) per decade1992 to 202534Rise
Mean daily maximum0.15 C (-0.04 to 0.34) per decade0.3 F (-0.1 to 0.6) per decade1992 to 202534Not clearly different from zero
Mean daily minimum0.5 C (0.3 to 0.7) per decade0.9 F (0.5 to 1.2) per decade1992 to 202534Rise

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

1980 to 2026
Yearly extremes at Derr.: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)35.7 C (96.3 F)200731.7 C (89.1 F)38
Coldest night (TNn)-28.5 C (-19.3 F)1998-19.1 C (-2.5 F)38
Wettest day (Rx1day)86.4 mm (3.4 in)198430.5 mm (1.2 in)47
Wettest five days (Rx5day)116.9 mm (4.6 in)200560.9 mm (2.4 in)47
Longest dry spell (CDD)111 days198745 days47

Hottest day (TXx)

Hottest day (TXx) at Derr. by year The hottest day of the year at Derr., 1980 to 2026. The record is 35.7 C (96.3 F) in 2007, marked on the chart; the median year is 31.7 C (89.1 F). 2527.53032.53537.519801990200020102020Record: 35.7 C (96.3 F) in 2007
The hottest day of the year at Derr., 1980 to 2026. The record is 35.7 C (96.3 F) in 2007, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Derr. by year
YearHottest day (TXx)
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
198926.0 C (78.8 F)
199033.5 C (92.3 F)
199127.3 C (81.1 F)
199230.5 C (86.9 F)
199328.3 C (82.9 F)
199431.4 C (88.5 F)
199529.2 C (84.6 F)
199633.8 C (92.8 F)
199729.7 C (85.5 F)
199833.0 C (91.4 F)
199931.0 C (87.8 F)
200030.1 C (86.2 F)
200131.2 C (88.2 F)
200234.9 C (94.8 F)
200334.2 C (93.6 F)
200430.8 C (87.4 F)
200531.9 C (89.4 F)
200633.0 C (91.4 F)
200735.7 C (96.3 F)
200833.2 C (91.8 F)
200934.8 C (94.6 F)
201031.6 C (88.9 F)
201129.3 C (84.7 F)
201230.9 C (87.6 F)
201331.7 C (89.1 F)
201430.4 C (86.7 F)
201532.8 C (91.0 F)
201630.6 C (87.1 F)
201733.8 C (92.8 F)
201835.3 C (95.5 F)
201930.9 C (87.6 F)
202034.2 C (93.6 F)
202134.8 C (94.6 F)
202234.0 C (93.2 F)
202333.4 C (92.1 F)
202433.3 C (91.9 F)
202531.7 C (89.1 F)
202631.7 C (89.1 F)

Coldest night (TNn)

Coldest night (TNn) at Derr. by year The coldest night of the year at Derr., 1980 to 2026. The record is -28.5 C (-19.3 F) in 1998, marked on the chart; the median year is -19.1 C (-2.5 F). -30-25-20-15-1019801990200020102020Record: -28.5 C (-19.3 F) in 1998
The coldest night of the year at Derr., 1980 to 2026. The record is -28.5 C (-19.3 F) in 1998, marked on the chart; the median year is -19.1 C (-2.5 F).
Coldest night (TNn) at Derr. by year
YearColdest night (TNn)
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989-13.6 C (7.5 F)
1990-17.1 C (1.2 F)
1991-18.3 C (-0.9 F)
1992-16.1 C (3.0 F)
1993-21.8 C (-7.2 F)
1994-21.1 C (-6.0 F)
1995-20.3 C (-4.5 F)
1996-19.8 C (-3.6 F)
1997-22.1 C (-7.8 F)
1998-28.5 C (-19.3 F)
1999-15.0 C (5.0 F)
2000-14.6 C (5.7 F)
2001-16.1 C (3.0 F)
2002-17.2 C (1.0 F)
2003-18.7 C (-1.7 F)
2004-16.3 C (2.7 F)
2005-18.5 C (-1.3 F)
2006-21.9 C (-7.4 F)
2007-21.6 C (-6.9 F)
2008-20.0 C (-4.0 F)
2009-24.1 C (-11.4 F)
2010-22.2 C (-8.0 F)
2011-21.8 C (-7.2 F)
2012-18.2 C (-0.8 F)
2013-23.7 C (-10.7 F)
2014-21.7 C (-7.1 F)
2015-16.2 C (2.8 F)
2016-20.2 C (-4.4 F)
2017-20.6 C (-5.1 F)
2018-20.8 C (-5.4 F)
2019-18.8 C (-1.8 F)
2020-16.4 C (2.5 F)
2021-16.9 C (1.6 F)
2022-20.9 C (-5.6 F)
2023-19.0 C (-2.2 F)
2024-14.9 C (5.2 F)
2025-19.3 C (-2.7 F)
2026-13.2 C (8.2 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Derr. by year The wettest day of the year at Derr., 1980 to 2026. The record is 86.4 mm (3.4 in) in 1984, marked on the chart; the median year is 30.5 mm (1.2 in). 02040608010019801990200020102020Record: 86.4 mm (3.4 in) in 1984
The wettest day of the year at Derr., 1980 to 2026. The record is 86.4 mm (3.4 in) in 1984, marked on the chart; the median year is 30.5 mm (1.2 in).
Wettest day (Rx1day) at Derr. by year
YearWettest day (Rx1day)
198020.3 mm (0.8 in)
198125.4 mm (1.0 in)
198255.9 mm (2.2 in)
198338.1 mm (1.5 in)
198486.4 mm (3.4 in)
198527.9 mm (1.1 in)
198625.4 mm (1.0 in)
198727.9 mm (1.1 in)
198820.3 mm (0.8 in)
198933.0 mm (1.3 in)
199020.3 mm (0.8 in)
199120.3 mm (0.8 in)
199220.3 mm (0.8 in)
199322.9 mm (0.9 in)
199425.4 mm (1.0 in)
199530.5 mm (1.2 in)
199658.4 mm (2.3 in)
199755.9 mm (2.2 in)
199840.6 mm (1.6 in)
199922.9 mm (0.9 in)
200053.3 mm (2.1 in)
200127.9 mm (1.1 in)
200238.1 mm (1.5 in)
200317.8 mm (0.7 in)
200453.3 mm (2.1 in)
200545.7 mm (1.8 in)
200627.9 mm (1.1 in)
200727.9 mm (1.1 in)
200833.0 mm (1.3 in)
200935.6 mm (1.4 in)
201033.0 mm (1.3 in)
201120.3 mm (0.8 in)
201235.6 mm (1.4 in)
201335.6 mm (1.4 in)
201433.0 mm (1.3 in)
201530.5 mm (1.2 in)
201622.9 mm (0.9 in)
201727.9 mm (1.1 in)
201825.4 mm (1.0 in)
201943.2 mm (1.7 in)
202030.5 mm (1.2 in)
202120.3 mm (0.8 in)
202230.5 mm (1.2 in)
202322.9 mm (0.9 in)
202435.6 mm (1.4 in)
202533.0 mm (1.3 in)
202617.8 mm (0.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Derr. by year The wettest five days of the year at Derr., 1980 to 2026. The record is 116.9 mm (4.6 in) in 2005, marked on the chart; the median year is 60.9 mm (2.4 in). 25507510012519801990200020102020Record: 116.9 mm (4.6 in) in 2005
The wettest five days of the year at Derr., 1980 to 2026. The record is 116.9 mm (4.6 in) in 2005, marked on the chart; the median year is 60.9 mm (2.4 in).
Wettest five days (Rx5day) at Derr. by year
YearWettest five days (Rx5day)
198053.3 mm (2.1 in)
198158.4 mm (2.3 in)
198294.0 mm (3.7 in)
198378.7 mm (3.1 in)
198496.6 mm (3.8 in)
198540.6 mm (1.6 in)
198653.3 mm (2.1 in)
198753.3 mm (2.1 in)
198855.9 mm (2.2 in)
198955.9 mm (2.2 in)
199050.8 mm (2.0 in)
199138.1 mm (1.5 in)
199248.3 mm (1.9 in)
199360.9 mm (2.4 in)
199458.4 mm (2.3 in)
199563.4 mm (2.5 in)
199683.8 mm (3.3 in)
199799.0 mm (3.9 in)
199893.9 mm (3.7 in)
199958.4 mm (2.3 in)
200071.1 mm (2.8 in)
200160.9 mm (2.4 in)
200291.4 mm (3.6 in)
200371.1 mm (2.8 in)
200491.3 mm (3.6 in)
2005116.9 mm (4.6 in)
200694.0 mm (3.7 in)
200745.8 mm (1.8 in)
200860.9 mm (2.4 in)
200955.9 mm (2.2 in)
201053.3 mm (2.1 in)
201150.7 mm (2.0 in)
201289.0 mm (3.5 in)
201363.5 mm (2.5 in)
201466.0 mm (2.6 in)
201571.2 mm (2.8 in)
201653.3 mm (2.1 in)
201768.5 mm (2.7 in)
201855.9 mm (2.2 in)
201991.5 mm (3.6 in)
202060.9 mm (2.4 in)
202145.7 mm (1.8 in)
202258.5 mm (2.3 in)
202363.6 mm (2.5 in)
202486.4 mm (3.4 in)
202576.2 mm (3.0 in)
202633.0 mm (1.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Derr. by year The longest dry spell of the year at Derr., 1980 to 2026. The record is 111 days in 1987, marked on the chart; the median year is 45 days. 025507510012519801990200020102020Record: 111 days in 1987
The longest dry spell of the year at Derr., 1980 to 2026. The record is 111 days in 1987, marked on the chart; the median year is 45 days.
Longest dry spell (CDD) at Derr. by year
YearLongest dry spell (CDD)
198026 days
198170 days
198241 days
198345 days
198467 days
198554 days
198631 days
1987111 days
198845 days
198936 days
199032 days
199160 days
199217 days
199351 days
199432 days
199536 days
199676 days
199717 days
199866 days
199937 days
200054 days
200144 days
200274 days
200399 days
200444 days
200573 days
200636 days
200769 days
200846 days
200950 days
201026 days
201167 days
201287 days
201327 days
201437 days
201535 days
201665 days
201745 days
201867 days
201927 days
202034 days
202150 days
202238 days
202345 days
202459 days
202539 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

34 years with a frost

Across 34 years with a frost, the median last spring frost at Derr. falls on 19 June and the median first autumn frost on 31 August, which leaves a median of 75 days between them.

Fitted over all years, the growing season changes by +19.3 days per decade at this station.

Frost dates and growing season at Derr.
MeasureMedian, all yearsEarliest periodRecent period (1996 to 2025)Recent against earliestFitted trend
Last spring frost19 Junen/a19 Junen/a-2.0 days per decade
First autumn frost31 Augustn/a4 Septembern/a+17.3 days per decade
Growing days75 daysn/a79 daysn/a+19.3 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.

Rainfall Return Levels

44 years, 1981 to 2025

A day with at least 29.8 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 87.2 mm (3.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Derr.: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years29.8 mm (1.2 in)
5 years40.7 mm (1.6 in)
10 years49.4 mm (1.9 in)
25 years62.5 mm (2.5 in)
50 years74.0 mm (2.9 in)Longer than the 44 years of record
100 years87.2 mm (3.4 in)Longer than the 44 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 44 years of values from 1981 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 86.4 mm (3.4 in) in 1984; 58.4 mm (2.3 in) in 1996; 55.9 mm (2.2 in) in 1982.

Download the Data

  • Data for Derr. standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Derr. 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).