Built 2026-10-15 (15 October 2026)

Illahe Weather Records (USC00354133)

Record envelope, standing records and threshold days for Illahe (USC00354133), Oregon, United States, with 70 years of record.

Key Facts for Illahe

  • Illahe (USC00354133) is a weather station in Oregon, United States at 42.63 latitude and -124.06 longitude, 106 m (348 ft) above sea level.
  • The station reports from 1938 to 2007, 70 years of record.
  • 1,464 records set at Illahe still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Illahe set a daily record low minimum temperature of 4.4 C (39.9 F) on 27 June 2007.

About the Station

  • Location: Oregon, United States, 42.63 latitude, -124.06 longitude.
  • Elevation: 106 m (348 ft).
  • Period of record: 1938 to 2007, 70 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Illahe, with 2026 drawn through them The band shows the record high and record low for each calendar day at Illahe. The lines show the 2026 daily maximum and minimum. 0 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 Illahe. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Illahe, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan18.9 C (66.0 F)-10.0 C (14.0 F)n/an/a
Feb24.4 C (75.9 F)-10.6 C (12.9 F)n/an/a
Mar30.0 C (86.0 F)-3.9 C (25.0 F)n/an/a
Apr34.4 C (93.9 F)-2.2 C (28.0 F)n/an/a
May37.2 C (99.0 F)-1.7 C (28.9 F)n/an/a
Jun43.9 C (111.0 F)1.1 C (34.0 F)n/an/a
Jul44.4 C (111.9 F)2.8 C (37.0 F)n/an/a
Aug43.3 C (109.9 F)0.0 C (32.0 F)n/an/a
Sep43.9 C (111.0 F)-0.6 C (30.9 F)n/an/a
Oct37.2 C (99.0 F)-5.0 C (23.0 F)n/an/a
Nov23.9 C (75.0 F)-8.3 C (17.1 F)n/an/a
Dec20.0 C (68.0 F)-14.4 C (6.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Illahe by the year they were set 1,464 records at Illahe still stand. 1996 holds the most, with 71. 0204060801938: 71939: 301940: 181941: 211942: 291943: 171944: 151945: 221946: 141947: 351948: 251949: 331950: 341951: 271952: 341953: 321954: 161955: 341956: 161957: 271958: 391959: 141960: 241961: 251962: 221967: 131968: 341969: 341970: 291971: 291972: 451973: 441974: 251975: 191976: 301977: 191978: 221979: 111980: 201981: 161982: 161983: 141984: 91985: 121986: 171987: 221988: 181989: 221990: 81991: 101992: 181993: 451994: 211995: 451996: 711997: 121998: 151999: 112000: 102001: 42002: 122003: 142004: 92005: 172006: 72007: 51938194519521959197019771984199119982005
1,464 records at Illahe still stand. 1996 holds the most, with 71.
Standing records at Illahe by the year they were set
Year setStanding records
19387
193930
194018
194121
194229
194317
194415
194522
194614
194735
194825
194933
195034
195127
195234
195332
195416
195534
195616
195727
195839
195914
196024
196125
196222
196713
196834
196934
197029
197129
197245
197344
197425
197519
197630
197719
197822
197911
198020
198116
198216
198314
19849
198512
198617
198722
198818
198922
19908
199110
199218
199345
199421
199545
199671
199712
199815
199911
200010
20014
200212
200314
20049
200517
20067
20075

All-Time Record Progression

1 new records
When Illahe set new all-time records 1 all-time records were set at Illahe between 18 November 1996 and 18 November 1996. Each dot is a new record. Record daily precipitation18 November 1996: Record daily precipitation 224.8 mm (8.9 in)
1 all-time records were set at Illahe between 18 November 1996 and 18 November 1996. Each dot is a new record.
When Illahe set new all-time records
DateKindDetail
1996-11-18Record daily precipitationRecord daily precipitation 224.8 mm (8.9 in)

Wettest Day of Each Month

Nov: 224.8 mm (8.9 in)
Record daily precipitation for each month at Illahe The wettest day on record for each calendar month at Illahe. The most was 224.8 mm (8.9 in) on 18 November 1996. 0100200300 Jan: 182.1 mm (7.2 in), 18 January 1953 Jan Feb: 128.3 mm (5.1 in), 21 February 1948 Feb Mar: 166.6 mm (6.6 in), 2 March 1972 Mar Apr: 76.2 mm (3.0 in), 1 April 1993 Apr May: 113.3 mm (4.5 in), 1 May 1949 May Jun: 55.1 mm (2.2 in), 22 June 1943 Jun Jul: 59.7 mm (2.4 in), 27 July 1947 Jul Aug: 44.5 mm (1.8 in), 26 August 1997 Aug Sep: 82.6 mm (3.3 in), 25 September 1986 Sep Oct: 137.7 mm (5.4 in), 28 October 1950 Oct Nov: 224.8 mm (8.9 in), 18 November 1996 Nov Dec: 209.6 mm (8.3 in), 28 December 1945 Dec
The wettest day on record for each calendar month at Illahe. The most was 224.8 mm (8.9 in) on 18 November 1996.
Record daily precipitation for each month at Illahe
MonthRecord daily precipitation (mm)Date
Jan182.1 mm (7.2 in)18 January 1953
Feb128.3 mm (5.1 in)21 February 1948
Mar166.6 mm (6.6 in)2 March 1972
Apr76.2 mm (3.0 in)1 April 1993
May113.3 mm (4.5 in)1 May 1949
Jun55.1 mm (2.2 in)22 June 1943
Jul59.7 mm (2.4 in)27 July 1947
Aug44.5 mm (1.8 in)26 August 1997
Sep82.6 mm (3.3 in)25 September 1986
Oct137.7 mm (5.4 in)28 October 1950
Nov224.8 mm (8.9 in)18 November 1996
Dec209.6 mm (8.3 in)28 December 1945

Period of Record Coverage

1938 to 2007
Days with data per year at Illahe 66 years of record at Illahe, 1938 to 2007. 15 years have data for under 90 percent of days and are left out of rankings: 1938, 1940, 1941, 1945, 1954, 1955, 1956, 1958 and others. 1938: 91 of 365 days1939: 365 of 365 days1940: 327 of 366 days1941: 322 of 365 days1942: 364 of 365 days1943: 365 of 365 days1944: 365 of 366 days1945: 323 of 365 days1946: 365 of 365 days1947: 364 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 362 of 365 days1951: 355 of 365 days1952: 362 of 366 days1953: 329 of 365 days1954: 310 of 365 days1955: 263 of 365 days1956: 316 of 366 days1957: 363 of 365 days1958: 274 of 365 days1959: 362 of 365 days1960: 364 of 366 days1961: 365 of 365 days1962: 356 of 365 days1967: 205 of 365 days1968: 366 of 366 days1969: 342 of 365 days1970: 356 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 364 of 365 days1974: 364 of 365 days1975: 365 of 365 days1976: 365 of 366 days1977: 354 of 365 days1978: 365 of 365 days1979: 363 of 365 days1980: 366 of 366 days1981: 364 of 365 days1982: 361 of 365 days1983: 362 of 365 days1984: 330 of 366 days1985: 307 of 365 days1986: 356 of 365 days1987: 357 of 365 days1988: 356 of 366 days1989: 363 of 365 days1990: 298 of 365 days1991: 300 of 365 days1992: 362 of 366 days1993: 363 of 365 days1994: 363 of 365 days1995: 360 of 365 days1996: 363 of 366 days1997: 358 of 365 days1998: 346 of 365 days1999: 358 of 365 days2000: 359 of 366 days2001: 357 of 365 days2002: 360 of 365 days2003: 362 of 365 days2004: 353 of 366 days2005: 327 of 365 days2006: 265 of 365 days2007: 147 of 365 days1940195019601970198019902000
66 years of record at Illahe, 1938 to 2007. 15 years have data for under 90 percent of days and are left out of rankings: 1938, 1940, 1941, 1945, 1954, 1955, 1956, 1958 and others.
Days with data per year at Illahe
YearDays with dataShare of yearComplete
19389125%No
1939365100%Yes
194032789%No
194132288%No
1942364100%Yes
1943365100%Yes
1944365100%Yes
194532388%No
1946365100%Yes
1947364100%Yes
1948366100%Yes
1949365100%Yes
195036299%Yes
195135597%Yes
195236299%Yes
195332990%Yes
195431085%No
195526372%No
195631686%No
195736399%Yes
195827475%No
195936299%Yes
196036499%Yes
1961365100%Yes
196235698%Yes
196720556%No
1968366100%Yes
196934294%Yes
197035698%Yes
1971365100%Yes
1972366100%Yes
1973364100%Yes
1974364100%Yes
1975365100%Yes
1976365100%Yes
197735497%Yes
1978365100%Yes
197936399%Yes
1980366100%Yes
1981364100%Yes
198236199%Yes
198336299%Yes
198433090%Yes
198530784%No
198635698%Yes
198735798%Yes
198835697%Yes
198936399%Yes
199029882%No
199130082%No
199236299%Yes
199336399%Yes
199436399%Yes
199536099%Yes
199636399%Yes
199735898%Yes
199834695%Yes
199935898%Yes
200035998%Yes
200135798%Yes
200236099%Yes
200336299%Yes
200435396%Yes
200532790%No
200626573%No
200714740%No

Latest Records

20
Latest records at Illahe
DateStationRecordValueBeat old record byOld record stoodSignificance
27 June 2007Illahe, USdaily low min4.4 C (39.9 F)1.2 C (2.2 F)57 years28 of 100 (Routine)
25 June 2007Illahe, USdaily low min4.4 C (39.9 F)1.2 C (2.2 F)50 years26 of 100 (Routine)
24 February 2007Illahe, USdaily snowfall3.8 cm (1.5 in)3.8 cm (1.5 in)68 years20 of 100 (Routine)
22 February 2007Illahe, USdaily snowfall2.5 cm (1.0 in)2.5 cm (1.0 in)68 years20 of 100 (Routine)
16 January 2007Illahe, USdaily low max (Tie)1.7 C (35.1 F)tie60 years6 of 100 (Routine)
15 January 2007Illahe, USdaily low max (Tie)1.7 C (35.1 F)tie60 years6 of 100 (Routine)
14 January 2007Illahe, USdaily low min-5.0 C (23.0 F)1.1 C (2.0 F)57 years27 of 100 (Routine)
14 January 2007Illahe, USdaily low max (Tie)1.7 C (35.1 F)tie56 years6 of 100 (Routine)
12 January 2007Illahe, USdaily low min (Tie)-6.7 C (19.9 F)tie57 years6 of 100 (Routine)
3 January 2007Illahe, USdaily high max (Tie)14.4 C (57.9 F)tie23 years3 of 100 (Routine)
2 January 2007Illahe, USdaily high max15.6 C (60.1 F)1.7 C (3.1 F)9 years14 of 100 (Routine)
1 January 2007Illahe, USdaily high max15.0 C (59.0 F)0.6 C (1.1 F)67 years28 of 100 (Routine)
31 December 2006Illahe, USdaily high max (Tie)15.0 C (59.0 F)tie0 years1 of 100 (Routine)
24 December 2006Illahe, USdaily rain76.2 mm (3.0 in)5.3 mm (0.21 in)65 years27 of 100 (Routine)
22 December 2006Illahe, USdaily rain80.0 mm (3.1 in)6.6 mm (0.26 in)33 years18 of 100 (Routine)
20 November 2006Illahe, USdaily rain63.5 mm (2.5 in)3.6 mm (0.14 in)32 years16 of 100 (Routine)
17 November 2006Illahe, USdaily high max18.3 C (64.9 F)1.1 C (2.0 F)29 years17 of 100 (Routine)
29 August 2006Illahe, USdaily high min17.8 C (64.0 F)2.8 C (5.0 F)32 years25 of 100 (Routine)
8 August 2006Illahe, USdaily rain (Tie)2.5 mm (0.10 in)tie64 years6 of 100 (Routine)
25 June 2006Illahe, USdaily high max40.6 C (105.1 F)0.6 C (1.1 F)37 years18 of 100 (Routine)

Climate Trend

46 complete years, 1939 to 2004
Annual mean temperature at Illahe as warming stripes, 1939 to 2004 One stripe for each of 46 complete years at Illahe, 1939 to 2004. Blue stripes are years cooler than the station's own mean of 13.0 C (55.4 F); red stripes are warmer. The coolest year was 1948, at 11.4 C (52.5 F), and the warmest was 1992, at 14.4 C (57.9 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1939: 13.5 C, +0.6 C from the station mean1942: 12.7 C, -0.3 C from the station mean1943: 12.9 C, -0.1 C from the station mean1944: 12.7 C, -0.3 C from the station mean1946: 12.4 C, -0.6 C from the station mean1947: 12.9 C, -0.1 C from the station mean1948: 11.4 C, -1.6 C from the station mean1949: 12.1 C, -0.8 C from the station mean1950: 12.8 C, -0.2 C from the station mean1952: 13.0 C, 0.0 C from the station mean1957: 12.5 C, -0.5 C from the station mean1959: 13.3 C, +0.3 C from the station mean1960: 13.3 C, +0.3 C from the station mean1961: 13.0 C, 0.0 C from the station mean1962: 12.6 C, -0.4 C from the station mean1968: 12.8 C, -0.1 C from the station mean1970: 12.8 C, -0.1 C from the station mean1971: 11.7 C, -1.3 C from the station mean1972: 12.7 C, -0.3 C from the station mean1973: 12.6 C, -0.4 C from the station mean1974: 13.2 C, +0.3 C from the station mean1975: 12.4 C, -0.6 C from the station mean1976: 12.7 C, -0.3 C from the station mean1978: 13.0 C, +0.1 C from the station mean1979: 13.1 C, +0.1 C from the station mean1980: 13.0 C, 0.0 C from the station mean1981: 13.4 C, +0.4 C from the station mean1982: 12.2 C, -0.8 C from the station mean1983: 12.8 C, -0.2 C from the station mean1986: 13.7 C, +0.7 C from the station mean1987: 14.0 C, +1.0 C from the station mean1988: 13.6 C, +0.6 C from the station mean1989: 12.8 C, -0.2 C from the station mean1992: 14.4 C, +1.4 C from the station mean1993: 12.7 C, -0.3 C from the station mean1994: 12.5 C, -0.5 C from the station mean1995: 14.2 C, +1.3 C from the station mean1996: 13.5 C, +0.5 C from the station mean1997: 13.2 C, +0.2 C from the station mean1998: 13.2 C, +0.2 C from the station mean1999: 13.0 C, 0.0 C from the station mean2000: 13.2 C, +0.2 C from the station mean2001: 13.0 C, 0.0 C from the station mean2002: 13.6 C, +0.6 C from the station mean2003: 13.2 C, +0.2 C from the station mean2004: 13.8 C, +0.8 C from the station mean1939195019601970198019902000
One stripe for each of 46 complete years at Illahe, 1939 to 2004. Blue stripes are years cooler than the station's own mean of 13.0 C (55.4 F); red stripes are warmer. The coolest year was 1948, at 11.4 C (52.5 F), and the warmest was 1992, at 14.4 C (57.9 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Illahe as warming stripes, 1939 to 2004
YearAnnual mean temperatureDifference from the station mean
193913.5 C+0.56 C
194212.7 C-0.29 C
194312.9 C-0.08 C
194412.7 C-0.28 C
194612.4 C-0.55 C
194712.9 C-0.05 C
194811.4 C-1.57 C
194912.1 C-0.84 C
195012.8 C-0.20 C
195213.0 C-0.03 C
195712.5 C-0.46 C
195913.3 C+0.28 C
196013.3 C+0.30 C
196113.0 C-0.01 C
196212.6 C-0.39 C
196812.8 C-0.14 C
197012.8 C-0.14 C
197111.7 C-1.32 C
197212.7 C-0.26 C
197312.6 C-0.35 C
197413.2 C+0.26 C
197512.4 C-0.55 C
197612.7 C-0.26 C
197813.0 C+0.06 C
197913.1 C+0.12 C
198013.0 C+0.02 C
198113.4 C+0.44 C
198212.2 C-0.75 C
198312.8 C-0.23 C
198613.7 C+0.74 C
198714.0 C+1.04 C
198813.6 C+0.58 C
198912.8 C-0.21 C
199214.4 C+1.40 C
199312.7 C-0.28 C
199412.5 C-0.52 C
199514.2 C+1.26 C
199613.5 C+0.48 C
199713.2 C+0.25 C
199813.2 C+0.24 C
199913.0 C-0.02 C
200013.2 C+0.18 C
200113.0 C0.00 C
200213.6 C+0.61 C
200313.2 C+0.22 C
200413.8 C+0.79 C

The annual mean temperature here has risen by 0.13 C (0.05 to 0.21) per decade over 1939 to 2004. In Fahrenheit: 0.2 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 46 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Illahe
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.13 C (0.05 to 0.21) per decade0.2 F (0.1 to 0.4) per decade1939 to 200446Rise
Mean daily maximum0.1 C (0.0 to 0.3) per decade0.2 F (-0.1 to 0.5) per decade1939 to 200446Not clearly different from zero
Mean daily minimum0.15 C (0.03 to 0.27) per decade0.3 F (0.1 to 0.5) per decade1939 to 200446Rise

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

1938 to 2007
Yearly extremes at Illahe: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)44.4 C (111.9 F)194640.3 C (104.5 F)66
Coldest night (TNn)-14.4 C (6.1 F)1972-5.6 C (21.9 F)66
Wettest day (Rx1day)224.8 mm (8.9 in)199698.2 mm (3.9 in)66
Wettest five days (Rx5day)525.3 mm (20.7 in)1953236.8 mm (9.3 in)66
Longest dry spell (CDD)111 days199852 days66

Hottest day (TXx)

Hottest day (TXx) at Illahe by year The hottest day of the year at Illahe, 1938 to 2007. The record is 44.4 C (111.9 F) in 1946, marked on the chart; the median year is 40.3 C (104.5 F). 25303540451940196019802000Record: 44.4 C (111.9 F) in 1946
The hottest day of the year at Illahe, 1938 to 2007. The record is 44.4 C (111.9 F) in 1946, marked on the chart; the median year is 40.3 C (104.5 F).
Hottest day (TXx) at Illahe by year
YearHottest day (TXx)
193825.6 C (78.1 F)
193942.8 C (109.0 F)
194038.9 C (102.0 F)
194141.1 C (106.0 F)
194241.1 C (106.0 F)
194339.4 C (102.9 F)
194442.8 C (109.0 F)
194540.6 C (105.1 F)
194644.4 C (111.9 F)
194736.1 C (97.0 F)
194840.0 C (104.0 F)
194940.6 C (105.1 F)
195040.6 C (105.1 F)
195139.4 C (102.9 F)
195240.6 C (105.1 F)
195341.1 C (106.0 F)
195435.0 C (95.0 F)
195543.9 C (111.0 F)
195643.9 C (111.0 F)
195739.4 C (102.9 F)
195842.2 C (108.0 F)
195940.6 C (105.1 F)
196041.7 C (107.1 F)
196142.2 C (108.0 F)
196238.9 C (102.0 F)
196741.7 C (107.1 F)
196840.0 C (104.0 F)
196938.9 C (102.0 F)
197040.6 C (105.1 F)
197138.3 C (100.9 F)
197242.2 C (108.0 F)
197340.6 C (105.1 F)
197439.4 C (102.9 F)
197538.9 C (102.0 F)
197637.8 C (100.0 F)
197741.7 C (107.1 F)
197843.3 C (109.9 F)
197939.4 C (102.9 F)
198037.8 C (100.0 F)
198142.8 C (109.0 F)
198239.4 C (102.9 F)
198335.6 C (96.1 F)
198438.9 C (102.0 F)
198538.3 C (100.9 F)
198638.9 C (102.0 F)
198742.8 C (109.0 F)
198841.1 C (106.0 F)
198936.7 C (98.1 F)
199039.4 C (102.9 F)
199139.4 C (102.9 F)
199240.6 C (105.1 F)
199338.3 C (100.9 F)
199440.6 C (105.1 F)
199538.9 C (102.0 F)
199642.8 C (109.0 F)
199739.4 C (102.9 F)
199842.2 C (108.0 F)
199938.3 C (100.9 F)
200038.3 C (100.9 F)
200137.2 C (99.0 F)
200241.7 C (107.1 F)
200342.2 C (108.0 F)
200440.6 C (105.1 F)
200539.4 C (102.9 F)
200640.6 C (105.1 F)
200734.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Illahe by year The coldest night of the year at Illahe, 1938 to 2007. The record is -14.4 C (6.1 F) in 1972, marked on the chart; the median year is -5.6 C (21.9 F). -15-10-501940196019802000Record: -14.4 C (6.1 F) in 1972
The coldest night of the year at Illahe, 1938 to 2007. The record is -14.4 C (6.1 F) in 1972, marked on the chart; the median year is -5.6 C (21.9 F).
Coldest night (TNn) at Illahe by year
YearColdest night (TNn)
1938-6.1 C (21.0 F)
1939-2.2 C (28.0 F)
1940-9.4 C (15.1 F)
1941-2.8 C (27.0 F)
1942-7.8 C (18.0 F)
1943-7.2 C (19.0 F)
1944-3.3 C (26.1 F)
1945-3.3 C (26.1 F)
1946-6.1 C (21.0 F)
1947-6.7 C (19.9 F)
1948-5.6 C (21.9 F)
1949-8.9 C (16.0 F)
1950-7.2 C (19.0 F)
1951-6.1 C (21.0 F)
1952-6.1 C (21.0 F)
1953-2.2 C (28.0 F)
1954-2.8 C (27.0 F)
1955-4.4 C (24.1 F)
1956-6.7 C (19.9 F)
1957-8.3 C (17.1 F)
1958-3.9 C (25.0 F)
1959-4.4 C (24.1 F)
1960-6.7 C (19.9 F)
1961-6.7 C (19.9 F)
1962-10.0 C (14.0 F)
1967-6.7 C (19.9 F)
1968-5.6 C (21.9 F)
1969-3.9 C (25.0 F)
1970-5.0 C (23.0 F)
1971-6.1 C (21.0 F)
1972-14.4 C (6.1 F)
1973-2.2 C (28.0 F)
1974-8.9 C (16.0 F)
1975-3.3 C (26.1 F)
1976-6.1 C (21.0 F)
1977-7.8 C (18.0 F)
1978-8.3 C (17.1 F)
1979-7.8 C (18.0 F)
1980-9.4 C (15.1 F)
1981-1.7 C (28.9 F)
1982-6.1 C (21.0 F)
1983-7.2 C (19.0 F)
1984-2.8 C (27.0 F)
1985-5.0 C (23.0 F)
1986-1.7 C (28.9 F)
1987-5.6 C (21.9 F)
1988-4.4 C (24.1 F)
1989-10.6 C (12.9 F)
1990-6.1 C (21.0 F)
1991-1.7 C (28.9 F)
1992-2.8 C (27.0 F)
1993-6.1 C (21.0 F)
1994-4.4 C (24.1 F)
1995-0.6 C (30.9 F)
1996-1.1 C (30.0 F)
1997-1.7 C (28.9 F)
1998-10.6 C (12.9 F)
1999-2.2 C (28.0 F)
2000-0.6 C (30.9 F)
2001-3.3 C (26.1 F)
2002-5.0 C (23.0 F)
2003-1.7 C (28.9 F)
2004-2.8 C (27.0 F)
2005-3.9 C (25.0 F)
2006-4.4 C (24.1 F)
2007-6.7 C (19.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Illahe by year The wettest day of the year at Illahe, 1938 to 2007. The record is 224.8 mm (8.9 in) in 1996, marked on the chart; the median year is 98.2 mm (3.9 in). 0501001502002501940196019802000Record: 224.8 mm (8.9 in) in 1996
The wettest day of the year at Illahe, 1938 to 2007. The record is 224.8 mm (8.9 in) in 1996, marked on the chart; the median year is 98.2 mm (3.9 in).
Wettest day (Rx1day) at Illahe by year
YearWettest day (Rx1day)
1938123.2 mm (4.9 in)
1939101.9 mm (4.0 in)
194097.3 mm (3.8 in)
1941103.6 mm (4.1 in)
1942154.4 mm (6.1 in)
194399.6 mm (3.9 in)
194481.3 mm (3.2 in)
1945209.6 mm (8.3 in)
1946113.3 mm (4.5 in)
194793.2 mm (3.7 in)
1948128.3 mm (5.1 in)
1949113.3 mm (4.5 in)
1950137.7 mm (5.4 in)
1951139.2 mm (5.5 in)
195289.4 mm (3.5 in)
1953182.1 mm (7.2 in)
195494.0 mm (3.7 in)
195549.0 mm (1.9 in)
195686.4 mm (3.4 in)
1957129.8 mm (5.1 in)
195849.3 mm (1.9 in)
195984.1 mm (3.3 in)
1960134.4 mm (5.3 in)
1961180.3 mm (7.1 in)
196275.9 mm (3.0 in)
196770.6 mm (2.8 in)
196879.0 mm (3.1 in)
196961.0 mm (2.4 in)
1970124.0 mm (4.9 in)
1971145.0 mm (5.7 in)
1972166.6 mm (6.6 in)
197368.3 mm (2.7 in)
1974103.4 mm (4.1 in)
197595.5 mm (3.8 in)
197668.1 mm (2.7 in)
1977114.3 mm (4.5 in)
197887.4 mm (3.4 in)
197987.9 mm (3.5 in)
1980113.5 mm (4.5 in)
1981107.4 mm (4.2 in)
198288.4 mm (3.5 in)
198371.1 mm (2.8 in)
198471.9 mm (2.8 in)
198579.2 mm (3.1 in)
198699.1 mm (3.9 in)
198791.4 mm (3.6 in)
1988128.3 mm (5.1 in)
198991.9 mm (3.6 in)
1990114.3 mm (4.5 in)
199161.2 mm (2.4 in)
199276.2 mm (3.0 in)
199376.2 mm (3.0 in)
199450.8 mm (2.0 in)
1995127.0 mm (5.0 in)
1996224.8 mm (8.9 in)
199768.8 mm (2.7 in)
1998177.8 mm (7.0 in)
199971.1 mm (2.8 in)
2000127.0 mm (5.0 in)
200173.7 mm (2.9 in)
200271.6 mm (2.8 in)
2003114.3 mm (4.5 in)
2004115.6 mm (4.6 in)
2005101.6 mm (4.0 in)
2006101.6 mm (4.0 in)
200763.5 mm (2.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Illahe by year The wettest five days of the year at Illahe, 1938 to 2007. The record is 525.3 mm (20.7 in) in 1953, marked on the chart; the median year is 236.8 mm (9.3 in). 02004006001940196019802000Record: 525.3 mm (20.7 in) in 1953
The wettest five days of the year at Illahe, 1938 to 2007. The record is 525.3 mm (20.7 in) in 1953, marked on the chart; the median year is 236.8 mm (9.3 in).
Wettest five days (Rx5day) at Illahe by year
YearWettest five days (Rx5day)
1938219.5 mm (8.6 in)
1939229.4 mm (9.0 in)
1940248.5 mm (9.8 in)
1941262.4 mm (10.3 in)
1942380.5 mm (15.0 in)
1943323.2 mm (12.7 in)
1944235.9 mm (9.3 in)
1945347.0 mm (13.7 in)
1946236.8 mm (9.3 in)
1947165.3 mm (6.5 in)
1948282.9 mm (11.1 in)
1949190.0 mm (7.5 in)
1950380.8 mm (15.0 in)
1951279.1 mm (11.0 in)
1952260.7 mm (10.3 in)
1953525.3 mm (20.7 in)
1954255.5 mm (10.1 in)
1955171.7 mm (6.8 in)
1956270.6 mm (10.7 in)
1957333.8 mm (13.1 in)
1958111.1 mm (4.4 in)
1959234.5 mm (9.2 in)
1960299.5 mm (11.8 in)
1961399.8 mm (15.7 in)
1962254.9 mm (10.0 in)
1967186.4 mm (7.3 in)
1968262.1 mm (10.3 in)
1969191.0 mm (7.5 in)
1970298.3 mm (11.7 in)
1971340.3 mm (13.4 in)
1972381.0 mm (15.0 in)
1973236.8 mm (9.3 in)
1974309.9 mm (12.2 in)
1975216.9 mm (8.5 in)
1976210.3 mm (8.3 in)
1977355.4 mm (14.0 in)
1978179.6 mm (7.1 in)
1979192.6 mm (7.6 in)
1980262.1 mm (10.3 in)
1981235.9 mm (9.3 in)
1982250.4 mm (9.9 in)
1983221.0 mm (8.7 in)
1984210.1 mm (8.3 in)
1985168.1 mm (6.6 in)
1986299.5 mm (11.8 in)
1987186.4 mm (7.3 in)
1988205.5 mm (8.1 in)
1989174.2 mm (6.9 in)
1990240.5 mm (9.5 in)
1991120.6 mm (4.7 in)
1992172.7 mm (6.8 in)
1993198.2 mm (7.8 in)
1994133.4 mm (5.3 in)
1995369.6 mm (14.6 in)
1996406.5 mm (16.0 in)
1997190.2 mm (7.5 in)
1998273.4 mm (10.8 in)
1999186.4 mm (7.3 in)
2000287.1 mm (11.3 in)
2001170.7 mm (6.7 in)
2002229.8 mm (9.0 in)
2003236.3 mm (9.3 in)
2004281.6 mm (11.1 in)
2005195.7 mm (7.7 in)
2006299.5 mm (11.8 in)
2007166.4 mm (6.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Illahe by year The longest dry spell of the year at Illahe, 1938 to 2007. The record is 111 days in 1998, marked on the chart; the median year is 52 days. 02550751001251940196019802000Record: 111 days in 1998
The longest dry spell of the year at Illahe, 1938 to 2007. The record is 111 days in 1998, marked on the chart; the median year is 52 days.
Longest dry spell (CDD) at Illahe by year
YearLongest dry spell (CDD)
193815 days
193943 days
194060 days
194138 days
194253 days
194341 days
194438 days
194546 days
194646 days
194728 days
194839 days
194971 days
195068 days
195155 days
195270 days
195352 days
195434 days
195527 days
195663 days
195748 days
195853 days
195947 days
196087 days
196164 days
196238 days
196793 days
196832 days
196981 days
197068 days
197132 days
197238 days
197367 days
1974110 days
197537 days
197628 days
197780 days
197840 days
197941 days
198052 days
198196 days
198270 days
198340 days
198442 days
198551 days
198672 days
198791 days
1988101 days
198924 days
199042 days
199174 days
199280 days
199335 days
199486 days
199558 days
199657 days
199741 days
1998111 days
199980 days
200079 days
200132 days
200279 days
200348 days
200474 days
200549 days
200637 days
200718 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

44 years with a frost

Across 44 years with a frost, the median last spring frost at Illahe falls on 6 April and the median first autumn frost on 6 November, which leaves a median of 224 days between them.

Fitted over all years, the growing season changes by +10.9 days per decade at this station.

Frost dates and growing season at Illahe
MeasureMedian, all yearsEarliest periodRecent period (1962 to 2004)Recent against earliestFitted trend
Last spring frost6 Apriln/a3 Apriln/a-7.1 days per decade
First autumn frost6 Novembern/a18 Novembern/a+3.7 days per decade
Growing days224 daysn/a238 daysn/a+10.9 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

49 years, 1939 to 2004

A day with at least 101.8 mm (4.0 in) of rain is expected about once in 2 years. A day with at least 254.7 mm (10.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Illahe: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years101.8 mm (4.0 in)
5 years135.8 mm (5.3 in)
10 years160.8 mm (6.3 in)
25 years195.7 mm (7.7 in)
50 years224.1 mm (8.8 in)Longer than the 49 years of record
100 years254.7 mm (10.0 in)Longer than the 49 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, 49 years of values from 1939 to 2004.

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: 224.8 mm (8.9 in) in 1996; 209.6 mm (8.3 in) in 1945; 182.1 mm (7.2 in) in 1953.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

  • Data for Illahe standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Illahe 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 (2025-12-31).