N Willamette Exp STN Weather Records (USC00356151)
Record envelope, standing records and threshold days for N Willamette Exp STN (USC00356151), Oregon, United States, with 45 years of record.
Key Facts for N Willamette Exp STN
- N Willamette Exp STN (USC00356151) is a weather station in Oregon, United States at 45.28 latitude and -122.75 longitude, 46 m (150 ft) above sea level.
- The station reports from 1963 to 2007, 45 years of record.
- 1,464 records set at N Willamette Exp STN still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- N Willamette Exp STN set a daily record high minimum temperature of 16.7 C (62.1 F) on 21 August 2007.
About the Station
- Location: Oregon, United States, 45.28 latitude, -122.75 longitude.
- Elevation: 46 m (150 ft).
- Period of record: 1963 to 2007, 45 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 18.3 C (64.9 F) | -13.3 C (8.1 F) | n/a | n/a |
| Feb | 22.2 C (72.0 F) | -13.3 C (8.1 F) | n/a | n/a |
| Mar | 25.6 C (78.1 F) | -6.7 C (19.9 F) | n/a | n/a |
| Apr | 30.0 C (86.0 F) | -7.2 C (19.0 F) | n/a | n/a |
| May | 38.3 C (100.9 F) | -1.7 C (28.9 F) | n/a | n/a |
| Jun | 40.0 C (104.0 F) | 1.1 C (34.0 F) | n/a | n/a |
| Jul | 40.0 C (104.0 F) | 5.0 C (41.0 F) | n/a | n/a |
| Aug | 40.6 C (105.1 F) | 2.8 C (37.0 F) | n/a | n/a |
| Sep | 40.6 C (105.1 F) | -1.1 C (30.0 F) | n/a | n/a |
| Oct | 35.0 C (95.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Nov | 22.2 C (72.0 F) | -10.0 C (14.0 F) | n/a | n/a |
| Dec | 19.4 C (66.9 F) | -19.4 C (-2.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1963 | 41 |
| 1964 | 54 |
| 1965 | 42 |
| 1966 | 38 |
| 1967 | 32 |
| 1968 | 27 |
| 1969 | 49 |
| 1970 | 46 |
| 1971 | 50 |
| 1972 | 58 |
| 1973 | 37 |
| 1974 | 35 |
| 1975 | 32 |
| 1976 | 43 |
| 1977 | 28 |
| 1978 | 35 |
| 1979 | 41 |
| 1980 | 30 |
| 1981 | 22 |
| 1982 | 24 |
| 1983 | 24 |
| 1984 | 23 |
| 1985 | 39 |
| 1986 | 29 |
| 1987 | 31 |
| 1988 | 26 |
| 1989 | 33 |
| 1990 | 37 |
| 1991 | 26 |
| 1992 | 28 |
| 1993 | 30 |
| 1994 | 21 |
| 1995 | 40 |
| 1996 | 30 |
| 1997 | 18 |
| 1998 | 46 |
| 1999 | 24 |
| 2000 | 15 |
| 2001 | 21 |
| 2002 | 24 |
| 2003 | 30 |
| 2004 | 27 |
| 2005 | 27 |
| 2006 | 30 |
| 2007 | 21 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1994-10-27 | Record daily precipitation | Record daily precipitation 121.9 mm (4.8 in) |
| 1998-12-19 | Record low maximum temperature | Record low maximum temperature -13.3 C (8.1 F) |
| 1998-12-20 | Record low maximum temperature | Record low maximum temperature -15.6 C (3.9 F) |
| 1998-12-24 | Record low minimum temperature | Record low minimum temperature -19.4 C (-2.9 F) |
| 2004-07-23 | Record high minimum temperature | Record high minimum temperature 21.1 C (70.0 F) |
| 2006-07-22 | Record high minimum temperature | Record high minimum temperature 23.9 C (75.0 F) |
Wettest Day of Each Month
Oct: 121.9 mm (4.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 51.3 mm (2.0 in) | 31 January 1997 |
| Feb | 68.6 mm (2.7 in) | 6 February 1996 |
| Mar | 50.8 mm (2.0 in) | 4 March 2007 |
| Apr | 106.7 mm (4.2 in) | 10 April 1982 |
| May | 45.2 mm (1.8 in) | 17 May 1991 |
| Jun | 40.4 mm (1.6 in) | 21 June 1984 |
| Jul | 44.7 mm (1.8 in) | 18 July 1987 |
| Aug | 35.6 mm (1.4 in) | 29 August 1983 |
| Sep | 51.8 mm (2.0 in) | 30 September 2005 |
| Oct | 121.9 mm (4.8 in) | 27 October 1994 |
| Nov | 94.2 mm (3.7 in) | 19 November 1996 |
| Dec | 58.4 mm (2.3 in) | 22 December 1964 |
Period of Record Coverage
1963 to 2007| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1963 | 332 | 91% | Yes |
| 1964 | 363 | 99% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 357 | 98% | Yes |
| 1969 | 350 | 96% | Yes |
| 1970 | 363 | 99% | Yes |
| 1971 | 361 | 99% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 360 | 99% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 361 | 99% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 361 | 99% | Yes |
| 1978 | 356 | 98% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 360 | 99% | Yes |
| 1982 | 363 | 99% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 363 | 99% | Yes |
| 1991 | 361 | 99% | Yes |
| 1992 | 364 | 99% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 363 | 99% | Yes |
| 1995 | 363 | 99% | Yes |
| 1996 | 364 | 99% | Yes |
| 1997 | 360 | 99% | Yes |
| 1998 | 357 | 98% | Yes |
| 1999 | 361 | 99% | Yes |
| 2000 | 336 | 92% | Yes |
| 2001 | 304 | 83% | No |
| 2002 | 275 | 75% | No |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 242 | 66% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 21 August 2007 | N Willamette Exp STN, US | daily high min | 16.7 C (62.1 F) | 1.1 C (2.0 F) | 9 years | 10 of 100 (Routine) |
| 20 August 2007 | N Willamette Exp STN, US | daily high min | 17.2 C (63.0 F) | 1.1 C (2.0 F) | 13 years | 12 of 100 (Routine) |
| 12 August 2007 | N Willamette Exp STN, US | daily low max | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 18 years | 11 of 100 (Routine) |
| 7 August 2007 | N Willamette Exp STN, US | daily high min | 15.6 C (60.1 F) | 0.6 C (1.1 F) | 28 years | 14 of 100 (Routine) |
| 29 July 2007 | N Willamette Exp STN, US | daily high min (Tie) | 15.6 C (60.1 F) | tie | 42 years | 4 of 100 (Routine) |
| 15 July 2007 | N Willamette Exp STN, US | daily high min (Tie) | 16.7 C (62.1 F) | tie | 36 years | 3 of 100 (Routine) |
| 14 July 2007 | N Willamette Exp STN, US | daily high min | 16.7 C (62.1 F) | 1.1 C (2.0 F) | 10 years | 11 of 100 (Routine) |
| 12 July 2007 | N Willamette Exp STN, US | daily high min (Tie) | 16.7 C (62.1 F) | tie | 16 years | 2 of 100 (Routine) |
| 11 July 2007 | N Willamette Exp STN, US | daily high min | 18.3 C (64.9 F) | 2.7 C (4.9 F) | 1 year | 15 of 100 (Routine) |
| 11 July 2007 | N Willamette Exp STN, US | daily high max | 33.9 C (93.0 F) | 1.1 C (2.0 F) | 16 years | 11 of 100 (Routine) |
| 10 July 2007 | N Willamette Exp STN, US | daily high min | 18.3 C (64.9 F) | 2.7 C (4.9 F) | 5 years | 16 of 100 (Routine) |
| 10 July 2007 | N Willamette Exp STN, US | daily high max | 39.4 C (102.9 F) | 2.7 C (4.9 F) | 4 years | 10 of 100 (Routine) |
| 30 May 2007 | N Willamette Exp STN, US | daily high max | 32.2 C (90.0 F) | 0.5 C (0.9 F) | 12 years | 7 of 100 (Routine) |
| 28 April 2007 | N Willamette Exp STN, US | daily high min | 12.2 C (54.0 F) | 0.5 C (0.9 F) | 28 years | 13 of 100 (Routine) |
| 17 April 2007 | N Willamette Exp STN, US | daily rain | 14.5 mm (0.6 in) | 1.3 mm (0.05 in) | 13 years | 10 of 100 (Routine) |
| 7 April 2007 | N Willamette Exp STN, US | daily high min | 10.0 C (50.0 F) | 1.1 C (2.0 F) | 17 years | 12 of 100 (Routine) |
| 7 April 2007 | N Willamette Exp STN, US | daily rain | 17.5 mm (0.7 in) | 3.0 mm (0.12 in) | 16 years | 12 of 100 (Routine) |
| 6 April 2007 | N Willamette Exp STN, US | daily high max | 25.0 C (77.0 F) | 1.1 C (2.0 F) | 40 years | 18 of 100 (Routine) |
| 6 April 2007 | N Willamette Exp STN, US | daily high min (Tie) | 7.8 C (46.0 F) | tie | 28 years | 3 of 100 (Routine) |
| 1 April 2007 | N Willamette Exp STN, US | daily low min (Tie) | -1.1 C (30.0 F) | tie | 26 years | 3 of 100 (Routine) |
Climate Trend
40 complete years, 1964 to 2006| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1964 | 10.1 C | -1.33 C |
| 1965 | 11.2 C | -0.27 C |
| 1966 | 11.4 C | -0.08 C |
| 1967 | 11.6 C | +0.15 C |
| 1968 | 11.2 C | -0.32 C |
| 1969 | 10.8 C | -0.65 C |
| 1970 | 10.9 C | -0.54 C |
| 1971 | 10.3 C | -1.21 C |
| 1972 | 10.8 C | -0.65 C |
| 1973 | 11.2 C | -0.31 C |
| 1974 | 11.2 C | -0.24 C |
| 1975 | 10.9 C | -0.53 C |
| 1976 | 10.6 C | -0.86 C |
| 1977 | 11.1 C | -0.39 C |
| 1978 | 11.2 C | -0.32 C |
| 1979 | 11.5 C | 0.00 C |
| 1980 | 11.1 C | -0.39 C |
| 1981 | 11.8 C | +0.29 C |
| 1982 | 11.1 C | -0.39 C |
| 1983 | 11.7 C | +0.24 C |
| 1984 | 11.1 C | -0.33 C |
| 1985 | 10.4 C | -1.09 C |
| 1986 | 12.0 C | +0.54 C |
| 1987 | 12.3 C | +0.82 C |
| 1988 | 11.6 C | +0.15 C |
| 1989 | 11.4 C | -0.10 C |
| 1990 | 11.7 C | +0.25 C |
| 1991 | 11.7 C | +0.24 C |
| 1992 | 12.8 C | +1.32 C |
| 1993 | 11.2 C | -0.31 C |
| 1994 | 11.8 C | +0.36 C |
| 1995 | 12.5 C | +1.05 C |
| 1996 | 11.6 C | +0.14 C |
| 1997 | 12.1 C | +0.59 C |
| 1998 | 11.7 C | +0.25 C |
| 1999 | 11.9 C | +0.40 C |
| 2003 | 12.6 C | +1.12 C |
| 2004 | 12.5 C | +1.03 C |
| 2005 | 12.1 C | +0.59 C |
| 2006 | 12.3 C | +0.80 C |
The annual mean temperature here has risen by 0.4 C (0.3 to 0.5) per decade over 1964 to 2006. In Fahrenheit: 0.7 F (0.5 to 0.9) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.4 C (0.3 to 0.5) per decade | 0.7 F (0.5 to 0.9) per decade | 1964 to 2006 | 40 | Rise |
| Mean daily maximum | 0.3 C (0.1 to 0.5) per decade | 0.5 F (0.2 to 0.8) per decade | 1964 to 2006 | 40 | Rise |
| Mean daily minimum | 0.5 C (0.3 to 0.6) per decade | 0.8 F (0.6 to 1.1) per decade | 1964 to 2006 | 40 | Rise |
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
1963 to 2007| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.6 C (105.1 F) | 1977 | 37.8 C (100.0 F) | 45 |
| Coldest night (TNn) | -19.4 C (-2.9 F) | 1998 | -6.7 C (19.9 F) | 45 |
| Wettest day (Rx1day) | 121.9 mm (4.8 in) | 1994 | 48.0 mm (1.9 in) | 45 |
| Wettest five days (Rx5day) | 209.0 mm (8.2 in) | 1996 | 101.2 mm (4.0 in) | 45 |
| Longest dry spell (CDD) | 80 days | 2000 | 40 days | 45 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1963 | 35.0 C (95.0 F) |
| 1964 | 33.9 C (93.0 F) |
| 1965 | 38.9 C (102.0 F) |
| 1966 | 35.0 C (95.0 F) |
| 1967 | 38.9 C (102.0 F) |
| 1968 | 36.7 C (98.1 F) |
| 1969 | 35.6 C (96.1 F) |
| 1970 | 36.1 C (97.0 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 38.9 C (102.0 F) |
| 1973 | 36.7 C (98.1 F) |
| 1974 | 36.1 C (97.0 F) |
| 1975 | 35.6 C (96.1 F) |
| 1976 | 34.4 C (93.9 F) |
| 1977 | 40.6 C (105.1 F) |
| 1978 | 38.9 C (102.0 F) |
| 1979 | 39.4 C (102.9 F) |
| 1980 | 38.9 C (102.0 F) |
| 1981 | 40.6 C (105.1 F) |
| 1982 | 37.8 C (100.0 F) |
| 1983 | 38.3 C (100.9 F) |
| 1984 | 35.6 C (96.1 F) |
| 1985 | 37.8 C (100.0 F) |
| 1986 | 36.7 C (98.1 F) |
| 1987 | 38.3 C (100.9 F) |
| 1988 | 40.6 C (105.1 F) |
| 1989 | 35.0 C (95.0 F) |
| 1990 | 38.9 C (102.0 F) |
| 1991 | 37.8 C (100.0 F) |
| 1992 | 40.0 C (104.0 F) |
| 1993 | 37.2 C (99.0 F) |
| 1994 | 38.9 C (102.0 F) |
| 1995 | 37.8 C (100.0 F) |
| 1996 | 38.3 C (100.9 F) |
| 1997 | 37.2 C (99.0 F) |
| 1998 | 38.9 C (102.0 F) |
| 1999 | 34.4 C (93.9 F) |
| 2000 | 36.1 C (97.0 F) |
| 2001 | 36.1 C (97.0 F) |
| 2002 | 38.9 C (102.0 F) |
| 2003 | 37.8 C (100.0 F) |
| 2004 | 39.4 C (102.9 F) |
| 2005 | 35.6 C (96.1 F) |
| 2006 | 40.0 C (104.0 F) |
| 2007 | 39.4 C (102.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1963 | -10.6 C (12.9 F) |
| 1964 | -13.3 C (8.1 F) |
| 1965 | -5.6 C (21.9 F) |
| 1966 | -4.4 C (24.1 F) |
| 1967 | -6.1 C (21.0 F) |
| 1968 | -6.1 C (21.0 F) |
| 1969 | -11.7 C (10.9 F) |
| 1970 | -5.6 C (21.9 F) |
| 1971 | -6.7 C (19.9 F) |
| 1972 | -15.0 C (5.0 F) |
| 1973 | -5.6 C (21.9 F) |
| 1974 | -13.3 C (8.1 F) |
| 1975 | -6.1 C (21.0 F) |
| 1976 | -6.1 C (21.0 F) |
| 1977 | -10.0 C (14.0 F) |
| 1978 | -10.6 C (12.9 F) |
| 1979 | -11.7 C (10.9 F) |
| 1980 | -11.7 C (10.9 F) |
| 1981 | -3.3 C (26.1 F) |
| 1982 | -10.0 C (14.0 F) |
| 1983 | -14.4 C (6.1 F) |
| 1984 | -9.4 C (15.1 F) |
| 1985 | -11.7 C (10.9 F) |
| 1986 | -3.9 C (25.0 F) |
| 1987 | -6.7 C (19.9 F) |
| 1988 | -6.7 C (19.9 F) |
| 1989 | -13.3 C (8.1 F) |
| 1990 | -17.8 C (0.0 F) |
| 1991 | -7.2 C (19.0 F) |
| 1992 | -6.7 C (19.9 F) |
| 1993 | -9.4 C (15.1 F) |
| 1994 | -6.1 C (21.0 F) |
| 1995 | -7.8 C (18.0 F) |
| 1996 | -8.9 C (16.0 F) |
| 1997 | -7.2 C (19.0 F) |
| 1998 | -19.4 C (-2.9 F) |
| 1999 | -3.9 C (25.0 F) |
| 2000 | -5.0 C (23.0 F) |
| 2001 | -7.2 C (19.0 F) |
| 2002 | -5.6 C (21.9 F) |
| 2003 | -4.4 C (24.1 F) |
| 2004 | -6.7 C (19.9 F) |
| 2005 | -6.7 C (19.9 F) |
| 2006 | -6.7 C (19.9 F) |
| 2007 | -6.1 C (21.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1963 | 50.0 mm (2.0 in) |
| 1964 | 58.4 mm (2.3 in) |
| 1965 | 42.9 mm (1.7 in) |
| 1966 | 47.2 mm (1.9 in) |
| 1967 | 29.0 mm (1.1 in) |
| 1968 | 52.3 mm (2.1 in) |
| 1969 | 38.9 mm (1.5 in) |
| 1970 | 39.4 mm (1.6 in) |
| 1971 | 40.1 mm (1.6 in) |
| 1972 | 50.8 mm (2.0 in) |
| 1973 | 55.6 mm (2.2 in) |
| 1974 | 51.1 mm (2.0 in) |
| 1975 | 50.5 mm (2.0 in) |
| 1976 | 47.2 mm (1.9 in) |
| 1977 | 46.7 mm (1.8 in) |
| 1978 | 50.5 mm (2.0 in) |
| 1979 | 33.0 mm (1.3 in) |
| 1980 | 51.1 mm (2.0 in) |
| 1981 | 44.7 mm (1.8 in) |
| 1982 | 106.7 mm (4.2 in) |
| 1983 | 42.2 mm (1.7 in) |
| 1984 | 72.4 mm (2.9 in) |
| 1985 | 40.1 mm (1.6 in) |
| 1986 | 31.0 mm (1.2 in) |
| 1987 | 53.1 mm (2.1 in) |
| 1988 | 33.8 mm (1.3 in) |
| 1989 | 48.3 mm (1.9 in) |
| 1990 | 29.5 mm (1.2 in) |
| 1991 | 45.2 mm (1.8 in) |
| 1992 | 47.8 mm (1.9 in) |
| 1993 | 35.6 mm (1.4 in) |
| 1994 | 121.9 mm (4.8 in) |
| 1995 | 62.2 mm (2.4 in) |
| 1996 | 94.2 mm (3.7 in) |
| 1997 | 51.3 mm (2.0 in) |
| 1998 | 55.4 mm (2.2 in) |
| 1999 | 48.0 mm (1.9 in) |
| 2000 | 28.7 mm (1.1 in) |
| 2001 | 26.4 mm (1.0 in) |
| 2002 | 41.1 mm (1.6 in) |
| 2003 | 49.3 mm (1.9 in) |
| 2004 | 25.7 mm (1.0 in) |
| 2005 | 52.6 mm (2.1 in) |
| 2006 | 53.3 mm (2.1 in) |
| 2007 | 50.8 mm (2.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1963 | 110.5 mm (4.4 in) |
| 1964 | 190.4 mm (7.5 in) |
| 1965 | 101.5 mm (4.0 in) |
| 1966 | 116.7 mm (4.6 in) |
| 1967 | 71.1 mm (2.8 in) |
| 1968 | 123.6 mm (4.9 in) |
| 1969 | 82.2 mm (3.2 in) |
| 1970 | 88.6 mm (3.5 in) |
| 1971 | 88.1 mm (3.5 in) |
| 1972 | 106.4 mm (4.2 in) |
| 1973 | 132.1 mm (5.2 in) |
| 1974 | 140.3 mm (5.5 in) |
| 1975 | 83.4 mm (3.3 in) |
| 1976 | 104.6 mm (4.1 in) |
| 1977 | 134.9 mm (5.3 in) |
| 1978 | 87.7 mm (3.5 in) |
| 1979 | 77.8 mm (3.1 in) |
| 1980 | 139.5 mm (5.5 in) |
| 1981 | 84.3 mm (3.3 in) |
| 1982 | 154.9 mm (6.1 in) |
| 1983 | 101.2 mm (4.0 in) |
| 1984 | 132.1 mm (5.2 in) |
| 1985 | 73.1 mm (2.9 in) |
| 1986 | 92.5 mm (3.6 in) |
| 1987 | 130.3 mm (5.1 in) |
| 1988 | 100.6 mm (4.0 in) |
| 1989 | 84.2 mm (3.3 in) |
| 1990 | 98.6 mm (3.9 in) |
| 1991 | 84.9 mm (3.3 in) |
| 1992 | 104.6 mm (4.1 in) |
| 1993 | 89.7 mm (3.5 in) |
| 1994 | 153.9 mm (6.1 in) |
| 1995 | 96.5 mm (3.8 in) |
| 1996 | 209.0 mm (8.2 in) |
| 1997 | 144.0 mm (5.7 in) |
| 1998 | 116.7 mm (4.6 in) |
| 1999 | 87.4 mm (3.4 in) |
| 2000 | 60.4 mm (2.4 in) |
| 2001 | 52.1 mm (2.1 in) |
| 2002 | 93.2 mm (3.7 in) |
| 2003 | 104.2 mm (4.1 in) |
| 2004 | 57.6 mm (2.3 in) |
| 2005 | 135.9 mm (5.4 in) |
| 2006 | 136.9 mm (5.4 in) |
| 2007 | 80.9 mm (3.2 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1963 | 25 days |
| 1964 | 24 days |
| 1965 | 37 days |
| 1966 | 52 days |
| 1967 | 79 days |
| 1968 | 24 days |
| 1969 | 44 days |
| 1970 | 41 days |
| 1971 | 41 days |
| 1972 | 36 days |
| 1973 | 58 days |
| 1974 | 52 days |
| 1975 | 32 days |
| 1976 | 24 days |
| 1977 | 33 days |
| 1978 | 40 days |
| 1979 | 35 days |
| 1980 | 54 days |
| 1981 | 55 days |
| 1982 | 22 days |
| 1983 | 23 days |
| 1984 | 62 days |
| 1985 | 52 days |
| 1986 | 45 days |
| 1987 | 34 days |
| 1988 | 67 days |
| 1989 | 24 days |
| 1990 | 41 days |
| 1991 | 45 days |
| 1992 | 31 days |
| 1993 | 44 days |
| 1994 | 59 days |
| 1995 | 24 days |
| 1996 | 34 days |
| 1997 | 40 days |
| 1998 | 27 days |
| 1999 | 46 days |
| 2000 | 80 days |
| 2001 | 22 days |
| 2002 | 27 days |
| 2003 | 44 days |
| 2004 | 33 days |
| 2005 | 55 days |
| 2006 | 48 days |
| 2007 | 31 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
40 years with a frostAcross 40 years with a frost, the median last spring frost at N Willamette Exp STN falls on 14 April and the median first autumn frost on 31 October, which leaves a median of 198 days between them.
Fitted over all years, the growing season changes by +11.1 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1974 to 2006) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 14 April | n/a | 9 April | n/a | -7.3 days per decade |
| First autumn frost | 31 October | n/a | 31 October | n/a | +3.8 days per decade |
| Growing days | 198 days | n/a | 201 days | n/a | +11.1 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
42 years, 1963 to 2006A day with at least 46.0 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 115.8 mm (4.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 46.0 mm (1.8 in) | |
| 5 years | 60.5 mm (2.4 in) | |
| 10 years | 71.6 mm (2.8 in) | |
| 25 years | 87.5 mm (3.4 in) | |
| 50 years | 100.9 mm (4.0 in) | Longer than the 42 years of record |
| 100 years | 115.8 mm (4.6 in) | Longer than the 42 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, 42 years of values from 1963 to 2006.
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: 121.9 mm (4.8 in) in 1994; 106.7 mm (4.2 in) in 1982; 94.2 mm (3.7 in) in 1996.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of N Willamette Exp STN, at 1981. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1981 ran 0.2 C (0.3 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1981 | +0.2 | +0.3 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
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 (2025-12-31).