Headworks Portland Wtr B Weather Records (USC00353770)
Record envelope, standing records and threshold days for Headworks Portland Wtr B (USC00353770), Oregon, United States, with 128 years of record.
Key Facts for Headworks Portland Wtr B
- Headworks Portland Wtr B (USC00353770) is a weather station in Oregon, United States at 45.45 latitude and -122.15 longitude, 228 m (748 ft) above sea level.
- The station reports from 1899 to 2026, 128 years of record.
- 1,464 records set at Headworks Portland Wtr B still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Headworks Portland Wtr B set a daily record high minimum temperature of 18.3 C (64.9 F) on 20 August 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, 45.45 latitude, -122.15 longitude.
- Elevation: 228 m (748 ft).
- Period of record: 1899 to 2026, 128 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
1 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 17.2 C (63.0 F) | -17.2 C (1.0 F) | 16.1 C (61.0 F) | -3.3 C (26.1 F) |
| Feb | 23.3 C (73.9 F) | -15.0 C (5.0 F) | 15.0 C (59.0 F) | -1.1 C (30.0 F) |
| Mar | 28.9 C (84.0 F) | -7.2 C (19.0 F) | 18.9 C (66.0 F) | 0.0 C (32.0 F) |
| Apr | 33.9 C (93.0 F) | -2.2 C (28.0 F) | 25.0 C (77.0 F) | 0.0 C (32.0 F) |
| May | 37.2 C (99.0 F) | -2.2 C (28.0 F) | 31.1 C (88.0 F) | 3.9 C (39.0 F) |
| Jun | 41.1 C (106.0 F) | 0.6 C (33.1 F) | 31.7 C (89.1 F) | 6.7 C (44.1 F) |
| Jul | 43.3 C (109.9 F) | 1.7 C (35.1 F) | 36.1 C (97.0 F) | 5.0 C (41.0 F) |
| Aug | 41.7 C (107.1 F) | -0.6 C (30.9 F) | 32.2 C (90.0 F) | 8.9 C (48.0 F) |
| Sep | 40.0 C (104.0 F) | -1.7 C (28.9 F) | 26.7 C (80.1 F) | 6.1 C (43.0 F) |
| Oct | 34.4 C (93.9 F) | -5.6 C (21.9 F) | 25.6 C (78.1 F) | 3.9 C (39.0 F) |
| Nov | 26.1 C (79.0 F) | -11.7 C (10.9 F) | n/a | n/a |
| Dec | 17.2 C (63.0 F) | -15.0 C (5.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1899 | 32 |
| 1900 | 14 |
| 1901 | 8 |
| 1902 | 14 |
| 1903 | 9 |
| 1904 | 1 |
| 1906 | 10 |
| 1907 | 12 |
| 1908 | 15 |
| 1909 | 21 |
| 1910 | 23 |
| 1911 | 30 |
| 1912 | 31 |
| 1913 | 24 |
| 1914 | 17 |
| 1915 | 6 |
| 1916 | 31 |
| 1917 | 16 |
| 1918 | 12 |
| 1919 | 17 |
| 1920 | 13 |
| 1921 | 30 |
| 1922 | 15 |
| 1923 | 3 |
| 1924 | 13 |
| 1925 | 8 |
| 1926 | 19 |
| 1927 | 10 |
| 1928 | 7 |
| 1929 | 10 |
| 1930 | 20 |
| 1931 | 3 |
| 1932 | 16 |
| 1933 | 12 |
| 1934 | 14 |
| 1935 | 24 |
| 1936 | 25 |
| 1937 | 13 |
| 1938 | 9 |
| 1939 | 9 |
| 1940 | 9 |
| 1941 | 15 |
| 1942 | 6 |
| 1943 | 6 |
| 1944 | 10 |
| 1945 | 12 |
| 1946 | 3 |
| 1947 | 7 |
| 1948 | 7 |
| 1949 | 24 |
| 1950 | 27 |
| 1951 | 18 |
| 1952 | 9 |
| 1953 | 7 |
| 1954 | 11 |
| 1955 | 22 |
| 1956 | 13 |
| 1957 | 8 |
| 1958 | 10 |
| 1959 | 3 |
| 1960 | 8 |
| 1961 | 13 |
| 1962 | 18 |
| 1963 | 13 |
| 1964 | 5 |
| 1965 | 12 |
| 1966 | 2 |
| 1967 | 5 |
| 1968 | 12 |
| 1969 | 5 |
| 1970 | 9 |
| 1971 | 11 |
| 1972 | 12 |
| 1973 | 3 |
| 1974 | 7 |
| 1975 | 2 |
| 1976 | 12 |
| 1977 | 14 |
| 1978 | 1 |
| 1979 | 6 |
| 1980 | 16 |
| 1981 | 16 |
| 1982 | 1 |
| 1983 | 18 |
| 1984 | 8 |
| 1985 | 20 |
| 1986 | 11 |
| 1987 | 15 |
| 1988 | 12 |
| 1989 | 12 |
| 1990 | 16 |
| 1991 | 12 |
| 1992 | 19 |
| 1993 | 7 |
| 1994 | 7 |
| 1995 | 10 |
| 1996 | 15 |
| 1997 | 6 |
| 1998 | 7 |
| 1999 | 6 |
| 2000 | 4 |
| 2001 | 5 |
| 2002 | 6 |
| 2003 | 7 |
| 2004 | 4 |
| 2005 | 6 |
| 2006 | 6 |
| 2007 | 5 |
| 2008 | 8 |
| 2009 | 8 |
| 2010 | 5 |
| 2011 | 9 |
| 2012 | 5 |
| 2013 | 8 |
| 2014 | 10 |
| 2015 | 12 |
| 2016 | 13 |
| 2017 | 10 |
| 2018 | 10 |
| 2019 | 9 |
| 2020 | 7 |
| 2021 | 7 |
| 2022 | 10 |
| 2023 | 18 |
| 2024 | 12 |
| 2025 | 10 |
| 2026 | 3 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1933-09-14 | Record daily precipitation | Record daily precipitation 134.6 mm (5.3 in) |
| 1933-12-06 | Record daily precipitation | Record daily precipitation 170.2 mm (6.7 in) |
| 1935-07-13 | Record high maximum temperature | Record high maximum temperature 43.3 C (109.9 F) |
| 1989-02-03 | Record low maximum temperature | Record low maximum temperature -11.1 C (12.0 F) |
| 1994-10-27 | Record daily precipitation | Record daily precipitation 172.7 mm (6.8 in) |
Wettest Day of Each Month
Oct: 172.7 mm (6.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 113.8 mm (4.5 in) | 6 January 1948 |
| Feb | 102.6 mm (4.0 in) | 7 February 1996 |
| Mar | 117.6 mm (4.6 in) | 31 March 1931 |
| Apr | 87.6 mm (3.4 in) | 27 April 1990 |
| May | 69.6 mm (2.7 in) | 17 May 1991 |
| Jun | 78.7 mm (3.1 in) | 30 June 1935 |
| Jul | 51.6 mm (2.0 in) | 2 July 1916 |
| Aug | 46.0 mm (1.8 in) | 22 August 2004 |
| Sep | 134.6 mm (5.3 in) | 14 September 1933 |
| Oct | 172.7 mm (6.8 in) | 27 October 1994 |
| Nov | 130.3 mm (5.1 in) | 20 November 1921 |
| Dec | 170.2 mm (6.7 in) | 6 December 1933 |
Period of Record Coverage
1899 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1899 | 267 | 73% | No |
| 1900 | 349 | 96% | Yes |
| 1901 | 317 | 87% | No |
| 1902 | 290 | 79% | No |
| 1903 | 208 | 57% | No |
| 1904 | 27 | 7% | No |
| 1905 | 30 | 8% | No |
| 1906 | 245 | 67% | No |
| 1907 | 358 | 98% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 365 | 100% | Yes |
| 1910 | 360 | 99% | Yes |
| 1911 | 357 | 98% | Yes |
| 1912 | 358 | 98% | Yes |
| 1913 | 330 | 90% | Yes |
| 1914 | 357 | 98% | Yes |
| 1915 | 365 | 100% | Yes |
| 1916 | 366 | 100% | Yes |
| 1917 | 362 | 99% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 364 | 100% | Yes |
| 1920 | 335 | 92% | Yes |
| 1921 | 362 | 99% | Yes |
| 1922 | 363 | 99% | Yes |
| 1923 | 362 | 99% | Yes |
| 1924 | 362 | 99% | Yes |
| 1925 | 363 | 99% | Yes |
| 1926 | 356 | 98% | Yes |
| 1927 | 355 | 97% | Yes |
| 1928 | 342 | 93% | Yes |
| 1929 | 364 | 100% | Yes |
| 1930 | 359 | 98% | Yes |
| 1931 | 364 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 363 | 99% | Yes |
| 1934 | 363 | 99% | Yes |
| 1935 | 362 | 99% | Yes |
| 1936 | 363 | 99% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 364 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 364 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 363 | 99% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 363 | 99% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 361 | 99% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 359 | 98% | Yes |
| 1955 | 358 | 98% | Yes |
| 1956 | 362 | 99% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 363 | 99% | Yes |
| 1962 | 362 | 99% | Yes |
| 1963 | 363 | 99% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 361 | 99% | Yes |
| 1966 | 362 | 99% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 363 | 99% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 363 | 99% | Yes |
| 1978 | 362 | 99% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 361 | 99% | Yes |
| 1981 | 361 | 99% | Yes |
| 1982 | 354 | 97% | Yes |
| 1983 | 358 | 98% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 361 | 99% | Yes |
| 1986 | 361 | 99% | Yes |
| 1987 | 324 | 89% | No |
| 1988 | 357 | 98% | Yes |
| 1989 | 359 | 98% | Yes |
| 1990 | 354 | 97% | Yes |
| 1991 | 360 | 99% | Yes |
| 1992 | 360 | 98% | Yes |
| 1993 | 359 | 98% | Yes |
| 1994 | 362 | 99% | Yes |
| 1995 | 360 | 99% | Yes |
| 1996 | 361 | 99% | Yes |
| 1997 | 318 | 87% | No |
| 1998 | 360 | 99% | Yes |
| 1999 | 363 | 99% | Yes |
| 2000 | 359 | 98% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 358 | 98% | Yes |
| 2004 | 364 | 99% | Yes |
| 2005 | 362 | 99% | Yes |
| 2006 | 357 | 98% | Yes |
| 2007 | 312 | 85% | No |
| 2008 | 322 | 88% | No |
| 2009 | 363 | 99% | Yes |
| 2010 | 362 | 99% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 364 | 100% | Yes |
| 2019 | 363 | 99% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 362 | 99% | Yes |
| 2025 | 364 | 100% | Yes |
| 2026 | 278 | 76% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 20 August 2026 | Headworks Portland Wtr B, US | daily high min (Provisional) | 18.3 C (64.9 F) | 2.2 C (4.0 F) | 9 years | 20 of 100 (Routine) |
| 30 June 2026 | Headworks Portland Wtr B, US | daily low max (Tie) | 12.8 C (55.0 F) | tie | 91 years | 9 of 100 (Routine) |
| 29 June 2026 | Headworks Portland Wtr B, US | daily low max | 13.3 C (55.9 F) | 1.1 C (2.0 F) | 71 years | 33 of 100 (Routine) |
| 18 June 2026 | Headworks Portland Wtr B, US | daily high min | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 125 years | 42 of 100 (Notable) |
| 16 May 2026 | Headworks Portland Wtr B, US | daily low max (Tie) | 10.0 C (50.0 F) | tie | 126 years | 10 of 100 (Routine) |
| 19 April 2026 | Headworks Portland Wtr B, US | daily high min (Tie) | 10.0 C (50.0 F) | tie | 9 years | 3 of 100 (Routine) |
| 15 April 2026 | Headworks Portland Wtr B, US | daily snowfall | 1.3 cm (0.5 in) | 1.3 cm (0.5 in) | 123 years | 20 of 100 (Routine) |
| 15 April 2026 | Headworks Portland Wtr B, US | daily rain | 40.9 mm (1.6 in) | 3.1 mm (0.12 in) | 15 years | 17 of 100 (Routine) |
| 19 March 2026 | Headworks Portland Wtr B, US | daily high min (Tie) | 8.3 C (46.9 F) | tie | 9 years | 3 of 100 (Routine) |
| 12 March 2026 | Headworks Portland Wtr B, US | daily rain | 65.3 mm (2.6 in) | 12.0 mm (0.5 in) | 80 years | 44 of 100 (Notable) |
| 23 February 2026 | Headworks Portland Wtr B, US | daily rain | 54.4 mm (2.1 in) | 2.6 mm (0.10 in) | 40 years | 24 of 100 (Routine) |
| 15 January 2026 | Headworks Portland Wtr B, US | daily high max | 16.1 C (61.0 F) | 1.1 C (2.0 F) | 68 years | 32 of 100 (Routine) |
| 18 December 2025 | Headworks Portland Wtr B, US | daily rain | 93.2 mm (3.7 in) | 42.9 mm (1.7 in) | 108 years | 70 of 100 (Major) |
| 17 December 2025 | Headworks Portland Wtr B, US | daily high max (Tie) | 12.8 C (55.0 F) | tie | 108 years | 10 of 100 (Routine) |
| 16 December 2025 | Headworks Portland Wtr B, US | daily high min | 8.9 C (48.0 F) | 1.7 C (3.1 F) | 52 years | 30 of 100 (Routine) |
| 12 December 2025 | Headworks Portland Wtr B, US | daily high min | 8.9 C (48.0 F) | 1.1 C (2.0 F) | 15 years | 17 of 100 (Routine) |
| 11 December 2025 | Headworks Portland Wtr B, US | daily high min | 10.0 C (50.0 F) | 1.7 C (3.1 F) | 104 years | 45 of 100 (Notable) |
| 11 December 2025 | Headworks Portland Wtr B, US | daily high max | 14.4 C (57.9 F) | 0.5 C (0.9 F) | 67 years | 31 of 100 (Routine) |
| 10 December 2025 | Headworks Portland Wtr B, US | monthly high min (Tie) | 11.1 C (52.0 F) | tie | 107 years | 12 of 100 (Routine) |
| 9 December 2025 | Headworks Portland Wtr B, US | daily rain | 73.7 mm (2.9 in) | 15.8 mm (0.6 in) | 38 years | 32 of 100 (Routine) |
Climate Trend
114 complete years, 1900 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1900 | 10.2 C | -0.61 C |
| 1907 | 10.5 C | -0.37 C |
| 1908 | 10.0 C | -0.80 C |
| 1909 | 9.1 C | -1.73 C |
| 1910 | 10.7 C | -0.10 C |
| 1911 | 9.5 C | -1.33 C |
| 1912 | 9.6 C | -1.22 C |
| 1914 | 10.5 C | -0.34 C |
| 1915 | 10.8 C | -0.07 C |
| 1916 | 9.0 C | -1.86 C |
| 1918 | 10.8 C | -0.02 C |
| 1919 | 10.0 C | -0.83 C |
| 1921 | 11.2 C | +0.33 C |
| 1922 | 9.6 C | -1.20 C |
| 1923 | 11.0 C | +0.20 C |
| 1924 | 10.7 C | -0.12 C |
| 1925 | 11.6 C | +0.74 C |
| 1926 | 12.2 C | +1.34 C |
| 1927 | 10.3 C | -0.53 C |
| 1928 | 10.6 C | -0.29 C |
| 1929 | 10.6 C | -0.23 C |
| 1930 | 10.8 C | -0.03 C |
| 1931 | 11.1 C | +0.27 C |
| 1932 | 10.5 C | -0.37 C |
| 1933 | 10.1 C | -0.76 C |
| 1934 | 12.3 C | +1.49 C |
| 1935 | 10.3 C | -0.53 C |
| 1936 | 11.0 C | +0.12 C |
| 1937 | 10.3 C | -0.56 C |
| 1938 | 10.9 C | +0.02 C |
| 1939 | 11.0 C | +0.19 C |
| 1940 | 11.7 C | +0.86 C |
| 1941 | 11.7 C | +0.86 C |
| 1942 | 10.6 C | -0.22 C |
| 1943 | 10.6 C | -0.28 C |
| 1944 | 10.8 C | -0.02 C |
| 1945 | 10.4 C | -0.42 C |
| 1946 | 10.1 C | -0.77 C |
| 1947 | 10.5 C | -0.32 C |
| 1948 | 9.2 C | -1.61 C |
| 1949 | 9.5 C | -1.31 C |
| 1950 | 9.2 C | -1.63 C |
| 1951 | 9.7 C | -1.17 C |
| 1952 | 10.5 C | -0.33 C |
| 1953 | 10.8 C | -0.08 C |
| 1954 | 9.8 C | -1.00 C |
| 1955 | 9.0 C | -1.80 C |
| 1956 | 9.7 C | -1.16 C |
| 1957 | 10.0 C | -0.80 C |
| 1958 | 12.5 C | +1.65 C |
| 1959 | 10.6 C | -0.23 C |
| 1960 | 10.7 C | -0.17 C |
| 1961 | 11.3 C | +0.44 C |
| 1962 | 10.7 C | -0.12 C |
| 1963 | 11.1 C | +0.21 C |
| 1964 | 10.2 C | -0.65 C |
| 1965 | 11.3 C | +0.49 C |
| 1966 | 11.1 C | +0.28 C |
| 1967 | 11.6 C | +0.75 C |
| 1968 | 11.0 C | +0.15 C |
| 1969 | 10.5 C | -0.30 C |
| 1970 | 11.0 C | +0.11 C |
| 1971 | 10.2 C | -0.61 C |
| 1972 | 10.4 C | -0.41 C |
| 1973 | 11.0 C | +0.19 C |
| 1974 | 10.9 C | +0.09 C |
| 1975 | 10.4 C | -0.43 C |
| 1976 | 11.0 C | +0.16 C |
| 1977 | 11.1 C | +0.27 C |
| 1978 | 10.9 C | +0.07 C |
| 1979 | 11.2 C | +0.35 C |
| 1980 | 11.2 C | +0.39 C |
| 1981 | 12.0 C | +1.11 C |
| 1982 | 10.8 C | -0.05 C |
| 1983 | 11.5 C | +0.61 C |
| 1984 | 11.1 C | +0.21 C |
| 1985 | 10.4 C | -0.46 C |
| 1986 | 11.9 C | +1.10 C |
| 1988 | 11.5 C | +0.69 C |
| 1989 | 11.2 C | +0.37 C |
| 1990 | 11.5 C | +0.67 C |
| 1991 | 11.8 C | +0.98 C |
| 1992 | 13.0 C | +2.19 C |
| 1993 | 11.4 C | +0.54 C |
| 1994 | 11.9 C | +1.06 C |
| 1995 | 12.3 C | +1.42 C |
| 1996 | 11.6 C | +0.79 C |
| 1998 | 11.9 C | +1.03 C |
| 1999 | 11.4 C | +0.60 C |
| 2000 | 11.2 C | +0.32 C |
| 2001 | 11.2 C | +0.31 C |
| 2002 | 11.3 C | +0.41 C |
| 2003 | 11.9 C | +1.04 C |
| 2004 | 11.8 C | +0.95 C |
| 2005 | 11.5 C | +0.61 C |
| 2006 | 11.4 C | +0.54 C |
| 2008 | 10.2 C | -0.66 C |
| 2009 | 10.5 C | -0.37 C |
| 2010 | 10.6 C | -0.25 C |
| 2011 | 9.7 C | -1.15 C |
| 2012 | 10.5 C | -0.32 C |
| 2013 | 10.6 C | -0.27 C |
| 2014 | 11.6 C | +0.76 C |
| 2015 | 12.5 C | +1.61 C |
| 2016 | 11.6 C | +0.76 C |
| 2017 | 10.7 C | -0.11 C |
| 2018 | 11.3 C | +0.50 C |
| 2019 | 10.4 C | -0.47 C |
| 2020 | 11.0 C | +0.13 C |
| 2021 | 10.8 C | -0.02 C |
| 2022 | 10.6 C | -0.26 C |
| 2023 | 11.0 C | +0.19 C |
| 2024 | 10.9 C | +0.09 C |
| 2025 | 11.2 C | +0.40 C |
The annual mean temperature here has risen by 0.09 C (0.05 to 0.13) per decade over 1900 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.2) per decade. The slope is a straight line fitted to 114 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.09 C (0.05 to 0.13) per decade | 0.2 F (0.1 to 0.2) per decade | 1900 to 2025 | 114 | Rise |
| Mean daily maximum | 0.00 C (-0.06 to 0.05) per decade | -0.01 F (-0.10 to 0.09) per decade | 1900 to 2025 | 114 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.3 to 0.4) per decade | 1900 to 2025 | 114 | 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
1899 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 43.3 C (109.9 F) | 1935 | 36.7 C (98.1 F) | 128 |
| Coldest night (TNn) | -17.2 C (1.0 F) | 1909 | -7.2 C (19.0 F) | 128 |
| Wettest day (Rx1day) | 172.7 mm (6.8 in) | 1994 | 72.4 mm (2.9 in) | 128 |
| Wettest five days (Rx5day) | 335.2 mm (13.2 in) | 1921 | 159.6 mm (6.3 in) | 128 |
| Longest dry spell (CDD) | 79 days | 1967 | 30 days | 128 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1899 | 33.3 C (91.9 F) |
| 1900 | 31.1 C (88.0 F) |
| 1901 | 30.6 C (87.1 F) |
| 1902 | 33.3 C (91.9 F) |
| 1903 | 33.3 C (91.9 F) |
| 1904 | 22.2 C (72.0 F) |
| 1905 | 26.7 C (80.1 F) |
| 1906 | 40.6 C (105.1 F) |
| 1907 | 38.9 C (102.0 F) |
| 1908 | 37.2 C (99.0 F) |
| 1909 | 32.2 C (90.0 F) |
| 1910 | 37.8 C (100.0 F) |
| 1911 | 40.0 C (104.0 F) |
| 1912 | 37.2 C (99.0 F) |
| 1913 | 35.6 C (96.1 F) |
| 1914 | 36.1 C (97.0 F) |
| 1915 | 37.8 C (100.0 F) |
| 1916 | 36.7 C (98.1 F) |
| 1917 | 39.4 C (102.9 F) |
| 1918 | 36.1 C (97.0 F) |
| 1919 | 40.6 C (105.1 F) |
| 1920 | 38.3 C (100.9 F) |
| 1921 | 33.9 C (93.0 F) |
| 1922 | 40.6 C (105.1 F) |
| 1923 | 37.8 C (100.0 F) |
| 1924 | 39.4 C (102.9 F) |
| 1925 | 38.3 C (100.9 F) |
| 1926 | 39.4 C (102.9 F) |
| 1927 | 41.1 C (106.0 F) |
| 1928 | 36.1 C (97.0 F) |
| 1929 | 36.7 C (98.1 F) |
| 1930 | 37.8 C (100.0 F) |
| 1931 | 38.9 C (102.0 F) |
| 1932 | 36.7 C (98.1 F) |
| 1933 | 38.3 C (100.9 F) |
| 1934 | 35.0 C (95.0 F) |
| 1935 | 43.3 C (109.9 F) |
| 1936 | 33.9 C (93.0 F) |
| 1937 | 37.2 C (99.0 F) |
| 1938 | 40.6 C (105.1 F) |
| 1939 | 41.7 C (107.1 F) |
| 1940 | 35.6 C (96.1 F) |
| 1941 | 42.2 C (108.0 F) |
| 1942 | 40.6 C (105.1 F) |
| 1943 | 33.3 C (91.9 F) |
| 1944 | 39.4 C (102.9 F) |
| 1945 | 37.8 C (100.0 F) |
| 1946 | 40.0 C (104.0 F) |
| 1947 | 33.3 C (91.9 F) |
| 1948 | 33.9 C (93.0 F) |
| 1949 | 34.4 C (93.9 F) |
| 1950 | 35.0 C (95.0 F) |
| 1951 | 38.9 C (102.0 F) |
| 1952 | 40.0 C (104.0 F) |
| 1953 | 36.7 C (98.1 F) |
| 1954 | 31.1 C (88.0 F) |
| 1955 | 36.1 C (97.0 F) |
| 1956 | 41.1 C (106.0 F) |
| 1957 | 37.2 C (99.0 F) |
| 1958 | 40.6 C (105.1 F) |
| 1959 | 35.6 C (96.1 F) |
| 1960 | 36.7 C (98.1 F) |
| 1961 | 40.0 C (104.0 F) |
| 1962 | 32.8 C (91.0 F) |
| 1963 | 33.9 C (93.0 F) |
| 1964 | 32.2 C (90.0 F) |
| 1965 | 37.8 C (100.0 F) |
| 1966 | 32.8 C (91.0 F) |
| 1967 | 36.7 C (98.1 F) |
| 1968 | 33.9 C (93.0 F) |
| 1969 | 32.8 C (91.0 F) |
| 1970 | 36.1 C (97.0 F) |
| 1971 | 35.0 C (95.0 F) |
| 1972 | 37.8 C (100.0 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 33.9 C (93.0 F) |
| 1975 | 33.3 C (91.9 F) |
| 1976 | 33.9 C (93.0 F) |
| 1977 | 40.6 C (105.1 F) |
| 1978 | 38.3 C (100.9 F) |
| 1979 | 37.2 C (99.0 F) |
| 1980 | 38.9 C (102.0 F) |
| 1981 | 38.9 C (102.0 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 37.2 C (99.0 F) |
| 1984 | 35.0 C (95.0 F) |
| 1985 | 36.7 C (98.1 F) |
| 1986 | 36.7 C (98.1 F) |
| 1987 | 39.4 C (102.9 F) |
| 1988 | 40.0 C (104.0 F) |
| 1989 | 33.9 C (93.0 F) |
| 1990 | 38.9 C (102.0 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 38.9 C (102.0 F) |
| 1993 | 35.6 C (96.1 F) |
| 1994 | 38.3 C (100.9 F) |
| 1995 | 36.1 C (97.0 F) |
| 1996 | 38.9 C (102.0 F) |
| 1997 | 34.4 C (93.9 F) |
| 1998 | 37.2 C (99.0 F) |
| 1999 | 34.4 C (93.9 F) |
| 2000 | 35.0 C (95.0 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 37.8 C (100.0 F) |
| 2003 | 36.1 C (97.0 F) |
| 2004 | 37.8 C (100.0 F) |
| 2005 | 34.4 C (93.9 F) |
| 2006 | 40.6 C (105.1 F) |
| 2007 | 36.1 C (97.0 F) |
| 2008 | 36.7 C (98.1 F) |
| 2009 | 38.3 C (100.9 F) |
| 2010 | 35.0 C (95.0 F) |
| 2011 | 33.9 C (93.0 F) |
| 2012 | 35.6 C (96.1 F) |
| 2013 | 35.6 C (96.1 F) |
| 2014 | 35.6 C (96.1 F) |
| 2015 | 38.3 C (100.9 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 38.9 C (102.0 F) |
| 2018 | 38.3 C (100.9 F) |
| 2019 | 37.8 C (100.0 F) |
| 2020 | 33.9 C (93.0 F) |
| 2021 | 41.1 C (106.0 F) |
| 2022 | 36.1 C (97.0 F) |
| 2023 | 38.3 C (100.9 F) |
| 2024 | 36.1 C (97.0 F) |
| 2025 | 36.7 C (98.1 F) |
| 2026 | 36.1 C (97.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1899 | -1.1 C (30.0 F) |
| 1900 | -6.7 C (19.9 F) |
| 1901 | -5.0 C (23.0 F) |
| 1902 | -12.8 C (9.0 F) |
| 1903 | -6.7 C (19.9 F) |
| 1904 | -2.8 C (27.0 F) |
| 1905 | 0.0 C (32.0 F) |
| 1906 | -5.6 C (21.9 F) |
| 1907 | -12.2 C (10.0 F) |
| 1908 | -6.1 C (21.0 F) |
| 1909 | -17.2 C (1.0 F) |
| 1910 | -9.4 C (15.1 F) |
| 1911 | -6.7 C (19.9 F) |
| 1912 | -5.6 C (21.9 F) |
| 1913 | -8.3 C (17.1 F) |
| 1914 | -8.9 C (16.0 F) |
| 1915 | -5.6 C (21.9 F) |
| 1916 | -9.4 C (15.1 F) |
| 1917 | -7.2 C (19.0 F) |
| 1918 | -6.7 C (19.9 F) |
| 1919 | -12.8 C (9.0 F) |
| 1920 | -4.4 C (24.1 F) |
| 1921 | -7.8 C (18.0 F) |
| 1922 | -12.2 C (10.0 F) |
| 1923 | -8.3 C (17.1 F) |
| 1924 | -15.0 C (5.0 F) |
| 1925 | -2.8 C (27.0 F) |
| 1926 | -7.2 C (19.0 F) |
| 1927 | -10.0 C (14.0 F) |
| 1928 | -10.0 C (14.0 F) |
| 1929 | -13.3 C (8.1 F) |
| 1930 | -14.4 C (6.1 F) |
| 1931 | -5.0 C (23.0 F) |
| 1932 | -12.8 C (9.0 F) |
| 1933 | -13.9 C (7.0 F) |
| 1934 | -1.1 C (30.0 F) |
| 1935 | -14.4 C (6.1 F) |
| 1936 | -12.8 C (9.0 F) |
| 1937 | -14.4 C (6.1 F) |
| 1938 | -5.0 C (23.0 F) |
| 1939 | -5.6 C (21.9 F) |
| 1940 | -4.4 C (24.1 F) |
| 1941 | -7.2 C (19.0 F) |
| 1942 | -10.6 C (12.9 F) |
| 1943 | -13.3 C (8.1 F) |
| 1944 | -5.6 C (21.9 F) |
| 1945 | -5.6 C (21.9 F) |
| 1946 | -4.4 C (24.1 F) |
| 1947 | -8.9 C (16.0 F) |
| 1948 | -7.8 C (18.0 F) |
| 1949 | -12.2 C (10.0 F) |
| 1950 | -16.7 C (1.9 F) |
| 1951 | -10.6 C (12.9 F) |
| 1952 | -8.3 C (17.1 F) |
| 1953 | -2.8 C (27.0 F) |
| 1954 | -9.4 C (15.1 F) |
| 1955 | -11.7 C (10.9 F) |
| 1956 | -10.0 C (14.0 F) |
| 1957 | -13.9 C (7.0 F) |
| 1958 | -3.3 C (26.1 F) |
| 1959 | -9.4 C (15.1 F) |
| 1960 | -6.1 C (21.0 F) |
| 1961 | -7.8 C (18.0 F) |
| 1962 | -12.2 C (10.0 F) |
| 1963 | -12.8 C (9.0 F) |
| 1964 | -12.8 C (9.0 F) |
| 1965 | -6.1 C (21.0 F) |
| 1966 | -4.4 C (24.1 F) |
| 1967 | -5.6 C (21.9 F) |
| 1968 | -13.3 C (8.1 F) |
| 1969 | -10.6 C (12.9 F) |
| 1970 | -3.3 C (26.1 F) |
| 1971 | -7.2 C (19.0 F) |
| 1972 | -15.0 C (5.0 F) |
| 1973 | -6.1 C (21.0 F) |
| 1974 | -11.1 C (12.0 F) |
| 1975 | -5.6 C (21.9 F) |
| 1976 | -5.0 C (23.0 F) |
| 1977 | -6.1 C (21.0 F) |
| 1978 | -10.0 C (14.0 F) |
| 1979 | -12.8 C (9.0 F) |
| 1980 | -11.1 C (12.0 F) |
| 1981 | -3.3 C (26.1 F) |
| 1982 | -10.0 C (14.0 F) |
| 1983 | -11.7 C (10.9 F) |
| 1984 | -8.3 C (17.1 F) |
| 1985 | -10.0 C (14.0 F) |
| 1986 | -2.8 C (27.0 F) |
| 1987 | -5.6 C (21.9 F) |
| 1988 | -6.7 C (19.9 F) |
| 1989 | -15.0 C (5.0 F) |
| 1990 | -15.0 C (5.0 F) |
| 1991 | -3.9 C (25.0 F) |
| 1992 | -3.3 C (26.1 F) |
| 1993 | -6.7 C (19.9 F) |
| 1994 | -5.0 C (23.0 F) |
| 1995 | -6.1 C (21.0 F) |
| 1996 | -11.7 C (10.9 F) |
| 1997 | -5.6 C (21.9 F) |
| 1998 | -12.8 C (9.0 F) |
| 1999 | -3.3 C (26.1 F) |
| 2000 | -2.8 C (27.0 F) |
| 2001 | -2.8 C (27.0 F) |
| 2002 | -3.3 C (26.1 F) |
| 2003 | -3.3 C (26.1 F) |
| 2004 | -8.3 C (17.1 F) |
| 2005 | -3.3 C (26.1 F) |
| 2006 | -7.2 C (19.0 F) |
| 2007 | -6.7 C (19.9 F) |
| 2008 | -8.3 C (17.1 F) |
| 2009 | -10.0 C (14.0 F) |
| 2010 | -7.8 C (18.0 F) |
| 2011 | -8.9 C (16.0 F) |
| 2012 | -1.7 C (28.9 F) |
| 2013 | -10.6 C (12.9 F) |
| 2014 | -7.8 C (18.0 F) |
| 2015 | -3.3 C (26.1 F) |
| 2016 | -4.4 C (24.1 F) |
| 2017 | -10.0 C (14.0 F) |
| 2018 | -7.2 C (19.0 F) |
| 2019 | -5.6 C (21.9 F) |
| 2020 | -1.7 C (28.9 F) |
| 2021 | -6.1 C (21.0 F) |
| 2022 | -8.3 C (17.1 F) |
| 2023 | -6.7 C (19.9 F) |
| 2024 | -11.1 C (12.0 F) |
| 2025 | -5.6 C (21.9 F) |
| 2026 | -3.3 C (26.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1899 | 62.2 mm (2.4 in) |
| 1900 | 57.9 mm (2.3 in) |
| 1901 | 87.6 mm (3.4 in) |
| 1902 | 75.4 mm (3.0 in) |
| 1903 | 67.1 mm (2.6 in) |
| 1904 | 69.1 mm (2.7 in) |
| 1905 | 41.1 mm (1.6 in) |
| 1906 | 54.6 mm (2.1 in) |
| 1907 | 81.3 mm (3.2 in) |
| 1908 | 101.6 mm (4.0 in) |
| 1909 | 61.0 mm (2.4 in) |
| 1910 | 61.5 mm (2.4 in) |
| 1911 | 96.5 mm (3.8 in) |
| 1912 | 74.9 mm (2.9 in) |
| 1913 | 70.1 mm (2.8 in) |
| 1914 | 63.5 mm (2.5 in) |
| 1915 | 83.8 mm (3.3 in) |
| 1916 | 61.0 mm (2.4 in) |
| 1917 | 91.9 mm (3.6 in) |
| 1918 | 63.8 mm (2.5 in) |
| 1919 | 81.3 mm (3.2 in) |
| 1920 | 82.0 mm (3.2 in) |
| 1921 | 130.3 mm (5.1 in) |
| 1922 | 45.5 mm (1.8 in) |
| 1923 | 87.6 mm (3.4 in) |
| 1924 | 47.5 mm (1.9 in) |
| 1925 | 53.3 mm (2.1 in) |
| 1926 | 56.6 mm (2.2 in) |
| 1927 | 66.0 mm (2.6 in) |
| 1928 | 70.6 mm (2.8 in) |
| 1929 | 55.9 mm (2.2 in) |
| 1930 | 77.5 mm (3.1 in) |
| 1931 | 117.6 mm (4.6 in) |
| 1932 | 78.7 mm (3.1 in) |
| 1933 | 170.2 mm (6.7 in) |
| 1934 | 95.5 mm (3.8 in) |
| 1935 | 78.7 mm (3.1 in) |
| 1936 | 69.6 mm (2.7 in) |
| 1937 | 106.7 mm (4.2 in) |
| 1938 | 81.3 mm (3.2 in) |
| 1939 | 72.9 mm (2.9 in) |
| 1940 | 80.3 mm (3.2 in) |
| 1941 | 100.1 mm (3.9 in) |
| 1942 | 111.5 mm (4.4 in) |
| 1943 | 77.5 mm (3.1 in) |
| 1944 | 46.5 mm (1.8 in) |
| 1945 | 65.3 mm (2.6 in) |
| 1946 | 86.9 mm (3.4 in) |
| 1947 | 62.5 mm (2.5 in) |
| 1948 | 113.8 mm (4.5 in) |
| 1949 | 88.4 mm (3.5 in) |
| 1950 | 75.2 mm (3.0 in) |
| 1951 | 65.3 mm (2.6 in) |
| 1952 | 59.7 mm (2.4 in) |
| 1953 | 79.2 mm (3.1 in) |
| 1954 | 52.3 mm (2.1 in) |
| 1955 | 88.9 mm (3.5 in) |
| 1956 | 69.1 mm (2.7 in) |
| 1957 | 64.3 mm (2.5 in) |
| 1958 | 79.8 mm (3.1 in) |
| 1959 | 54.6 mm (2.1 in) |
| 1960 | 99.1 mm (3.9 in) |
| 1961 | 86.4 mm (3.4 in) |
| 1962 | 72.6 mm (2.9 in) |
| 1963 | 45.7 mm (1.8 in) |
| 1964 | 56.9 mm (2.2 in) |
| 1965 | 79.5 mm (3.1 in) |
| 1966 | 77.2 mm (3.0 in) |
| 1967 | 49.5 mm (1.9 in) |
| 1968 | 102.4 mm (4.0 in) |
| 1969 | 89.7 mm (3.5 in) |
| 1970 | 61.0 mm (2.4 in) |
| 1971 | 84.3 mm (3.3 in) |
| 1972 | 72.4 mm (2.9 in) |
| 1973 | 67.6 mm (2.7 in) |
| 1974 | 70.1 mm (2.8 in) |
| 1975 | 63.8 mm (2.5 in) |
| 1976 | 57.2 mm (2.3 in) |
| 1977 | 83.8 mm (3.3 in) |
| 1978 | 79.5 mm (3.1 in) |
| 1979 | 53.3 mm (2.1 in) |
| 1980 | 58.4 mm (2.3 in) |
| 1981 | 56.6 mm (2.2 in) |
| 1982 | 69.9 mm (2.8 in) |
| 1983 | 72.4 mm (2.9 in) |
| 1984 | 72.6 mm (2.9 in) |
| 1985 | 76.5 mm (3.0 in) |
| 1986 | 74.4 mm (2.9 in) |
| 1987 | 81.8 mm (3.2 in) |
| 1988 | 57.2 mm (2.3 in) |
| 1989 | 53.1 mm (2.1 in) |
| 1990 | 87.6 mm (3.4 in) |
| 1991 | 95.0 mm (3.7 in) |
| 1992 | 65.3 mm (2.6 in) |
| 1993 | 52.1 mm (2.1 in) |
| 1994 | 172.7 mm (6.8 in) |
| 1995 | 89.4 mm (3.5 in) |
| 1996 | 102.6 mm (4.0 in) |
| 1997 | 59.7 mm (2.4 in) |
| 1998 | 49.5 mm (1.9 in) |
| 1999 | 75.9 mm (3.0 in) |
| 2000 | 50.8 mm (2.0 in) |
| 2001 | 51.1 mm (2.0 in) |
| 2002 | 65.3 mm (2.6 in) |
| 2003 | 72.4 mm (2.9 in) |
| 2004 | 48.8 mm (1.9 in) |
| 2005 | 92.2 mm (3.6 in) |
| 2006 | 108.0 mm (4.3 in) |
| 2007 | 77.5 mm (3.1 in) |
| 2008 | 80.3 mm (3.2 in) |
| 2009 | 106.7 mm (4.2 in) |
| 2010 | 53.8 mm (2.1 in) |
| 2011 | 66.5 mm (2.6 in) |
| 2012 | 79.0 mm (3.1 in) |
| 2013 | 76.2 mm (3.0 in) |
| 2014 | 56.1 mm (2.2 in) |
| 2015 | 87.9 mm (3.5 in) |
| 2016 | 67.8 mm (2.7 in) |
| 2017 | 61.2 mm (2.4 in) |
| 2018 | 45.0 mm (1.8 in) |
| 2019 | 36.8 mm (1.4 in) |
| 2020 | 58.4 mm (2.3 in) |
| 2021 | 72.1 mm (2.8 in) |
| 2022 | 82.6 mm (3.3 in) |
| 2023 | 67.8 mm (2.7 in) |
| 2024 | 46.5 mm (1.8 in) |
| 2025 | 93.2 mm (3.7 in) |
| 2026 | 65.3 mm (2.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1899 | 158.3 mm (6.2 in) |
| 1900 | 131.1 mm (5.2 in) |
| 1901 | 191.0 mm (7.5 in) |
| 1902 | 140.2 mm (5.5 in) |
| 1903 | 150.2 mm (5.9 in) |
| 1904 | 142.2 mm (5.6 in) |
| 1905 | 131.7 mm (5.2 in) |
| 1906 | 163.5 mm (6.4 in) |
| 1907 | 179.3 mm (7.1 in) |
| 1908 | 170.5 mm (6.7 in) |
| 1909 | 166.4 mm (6.6 in) |
| 1910 | 142.0 mm (5.6 in) |
| 1911 | 176.5 mm (6.9 in) |
| 1912 | 186.4 mm (7.3 in) |
| 1913 | 169.4 mm (6.7 in) |
| 1914 | 133.1 mm (5.2 in) |
| 1915 | 147.8 mm (5.8 in) |
| 1916 | 129.6 mm (5.1 in) |
| 1917 | 238.0 mm (9.4 in) |
| 1918 | 117.9 mm (4.6 in) |
| 1919 | 201.7 mm (7.9 in) |
| 1920 | 163.3 mm (6.4 in) |
| 1921 | 335.2 mm (13.2 in) |
| 1922 | 119.3 mm (4.7 in) |
| 1923 | 238.5 mm (9.4 in) |
| 1924 | 120.6 mm (4.7 in) |
| 1925 | 131.1 mm (5.2 in) |
| 1926 | 142.7 mm (5.6 in) |
| 1927 | 163.1 mm (6.4 in) |
| 1928 | 173.0 mm (6.8 in) |
| 1929 | 160.1 mm (6.3 in) |
| 1930 | 123.7 mm (4.9 in) |
| 1931 | 229.6 mm (9.0 in) |
| 1932 | 181.0 mm (7.1 in) |
| 1933 | 310.5 mm (12.2 in) |
| 1934 | 189.7 mm (7.5 in) |
| 1935 | 110.5 mm (4.4 in) |
| 1936 | 169.3 mm (6.7 in) |
| 1937 | 258.3 mm (10.2 in) |
| 1938 | 136.0 mm (5.4 in) |
| 1939 | 170.0 mm (6.7 in) |
| 1940 | 138.0 mm (5.4 in) |
| 1941 | 201.0 mm (7.9 in) |
| 1942 | 257.4 mm (10.1 in) |
| 1943 | 193.8 mm (7.6 in) |
| 1944 | 101.6 mm (4.0 in) |
| 1945 | 171.5 mm (6.8 in) |
| 1946 | 243.3 mm (9.6 in) |
| 1947 | 217.2 mm (8.6 in) |
| 1948 | 201.4 mm (7.9 in) |
| 1949 | 252.2 mm (9.9 in) |
| 1950 | 165.4 mm (6.5 in) |
| 1951 | 181.2 mm (7.1 in) |
| 1952 | 144.2 mm (5.7 in) |
| 1953 | 194.5 mm (7.7 in) |
| 1954 | 129.0 mm (5.1 in) |
| 1955 | 156.5 mm (6.2 in) |
| 1956 | 137.4 mm (5.4 in) |
| 1957 | 177.6 mm (7.0 in) |
| 1958 | 155.0 mm (6.1 in) |
| 1959 | 128.3 mm (5.1 in) |
| 1960 | 224.1 mm (8.8 in) |
| 1961 | 183.4 mm (7.2 in) |
| 1962 | 127.8 mm (5.0 in) |
| 1963 | 116.9 mm (4.6 in) |
| 1964 | 222.3 mm (8.8 in) |
| 1965 | 235.5 mm (9.3 in) |
| 1966 | 181.2 mm (7.1 in) |
| 1967 | 118.0 mm (4.6 in) |
| 1968 | 199.7 mm (7.9 in) |
| 1969 | 202.3 mm (8.0 in) |
| 1970 | 158.5 mm (6.2 in) |
| 1971 | 165.8 mm (6.5 in) |
| 1972 | 181.0 mm (7.1 in) |
| 1973 | 145.6 mm (5.7 in) |
| 1974 | 158.2 mm (6.2 in) |
| 1975 | 162.1 mm (6.4 in) |
| 1976 | 154.0 mm (6.1 in) |
| 1977 | 211.1 mm (8.3 in) |
| 1978 | 145.1 mm (5.7 in) |
| 1979 | 139.4 mm (5.5 in) |
| 1980 | 192.6 mm (7.6 in) |
| 1981 | 159.0 mm (6.3 in) |
| 1982 | 193.0 mm (7.6 in) |
| 1983 | 197.1 mm (7.8 in) |
| 1984 | 120.1 mm (4.7 in) |
| 1985 | 158.8 mm (6.3 in) |
| 1986 | 139.1 mm (5.5 in) |
| 1987 | 163.3 mm (6.4 in) |
| 1988 | 139.0 mm (5.5 in) |
| 1989 | 126.0 mm (5.0 in) |
| 1990 | 157.5 mm (6.2 in) |
| 1991 | 125.1 mm (4.9 in) |
| 1992 | 151.8 mm (6.0 in) |
| 1993 | 114.5 mm (4.5 in) |
| 1994 | 279.2 mm (11.0 in) |
| 1995 | 192.8 mm (7.6 in) |
| 1996 | 275.1 mm (10.8 in) |
| 1997 | 151.7 mm (6.0 in) |
| 1998 | 150.4 mm (5.9 in) |
| 1999 | 144.5 mm (5.7 in) |
| 2000 | 101.0 mm (4.0 in) |
| 2001 | 122.5 mm (4.8 in) |
| 2002 | 125.5 mm (4.9 in) |
| 2003 | 186.6 mm (7.3 in) |
| 2004 | 125.7 mm (4.9 in) |
| 2005 | 174.5 mm (6.9 in) |
| 2006 | 236.1 mm (9.3 in) |
| 2007 | 147.9 mm (5.8 in) |
| 2008 | 148.2 mm (5.8 in) |
| 2009 | 184.9 mm (7.3 in) |
| 2010 | 142.9 mm (5.6 in) |
| 2011 | 155.4 mm (6.1 in) |
| 2012 | 183.9 mm (7.2 in) |
| 2013 | 204.3 mm (8.0 in) |
| 2014 | 118.6 mm (4.7 in) |
| 2015 | 191.0 mm (7.5 in) |
| 2016 | 160.3 mm (6.3 in) |
| 2017 | 144.3 mm (5.7 in) |
| 2018 | 99.0 mm (3.9 in) |
| 2019 | 132.9 mm (5.2 in) |
| 2020 | 118.1 mm (4.6 in) |
| 2021 | 139.5 mm (5.5 in) |
| 2022 | 172.2 mm (6.8 in) |
| 2023 | 170.5 mm (6.7 in) |
| 2024 | 138.1 mm (5.4 in) |
| 2025 | 201.4 mm (7.9 in) |
| 2026 | 148.0 mm (5.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1899 | 17 days |
| 1900 | 26 days |
| 1901 | 34 days |
| 1902 | 15 days |
| 1903 | 29 days |
| 1904 | 30 days |
| 1905 | 28 days |
| 1906 | 21 days |
| 1907 | 19 days |
| 1908 | 26 days |
| 1909 | 16 days |
| 1910 | 55 days |
| 1911 | 30 days |
| 1912 | 14 days |
| 1913 | 25 days |
| 1914 | 55 days |
| 1915 | 31 days |
| 1916 | 30 days |
| 1917 | 40 days |
| 1918 | 21 days |
| 1919 | 36 days |
| 1920 | 36 days |
| 1921 | 22 days |
| 1922 | 60 days |
| 1923 | 42 days |
| 1924 | 25 days |
| 1925 | 59 days |
| 1926 | 58 days |
| 1927 | 37 days |
| 1928 | 47 days |
| 1929 | 59 days |
| 1930 | 50 days |
| 1931 | 42 days |
| 1932 | 21 days |
| 1933 | 26 days |
| 1934 | 36 days |
| 1935 | 19 days |
| 1936 | 42 days |
| 1937 | 13 days |
| 1938 | 32 days |
| 1939 | 40 days |
| 1940 | 42 days |
| 1941 | 34 days |
| 1942 | 20 days |
| 1943 | 24 days |
| 1944 | 18 days |
| 1945 | 22 days |
| 1946 | 22 days |
| 1947 | 14 days |
| 1948 | 16 days |
| 1949 | 19 days |
| 1950 | 30 days |
| 1951 | 52 days |
| 1952 | 37 days |
| 1953 | 29 days |
| 1954 | 28 days |
| 1955 | 45 days |
| 1956 | 25 days |
| 1957 | 26 days |
| 1958 | 33 days |
| 1959 | 34 days |
| 1960 | 41 days |
| 1961 | 40 days |
| 1962 | 20 days |
| 1963 | 24 days |
| 1964 | 9 days |
| 1965 | 22 days |
| 1966 | 32 days |
| 1967 | 79 days |
| 1968 | 25 days |
| 1969 | 23 days |
| 1970 | 37 days |
| 1971 | 40 days |
| 1972 | 32 days |
| 1973 | 57 days |
| 1974 | 22 days |
| 1975 | 32 days |
| 1976 | 20 days |
| 1977 | 23 days |
| 1978 | 16 days |
| 1979 | 32 days |
| 1980 | 34 days |
| 1981 | 20 days |
| 1982 | 14 days |
| 1983 | 16 days |
| 1984 | 62 days |
| 1985 | 52 days |
| 1986 | 34 days |
| 1987 | 30 days |
| 1988 | 32 days |
| 1989 | 23 days |
| 1990 | 17 days |
| 1991 | 37 days |
| 1992 | 16 days |
| 1993 | 41 days |
| 1994 | 47 days |
| 1995 | 18 days |
| 1996 | 28 days |
| 1997 | 39 days |
| 1998 | 47 days |
| 1999 | 28 days |
| 2000 | 19 days |
| 2001 | 32 days |
| 2002 | 24 days |
| 2003 | 44 days |
| 2004 | 25 days |
| 2005 | 25 days |
| 2006 | 40 days |
| 2007 | 25 days |
| 2008 | 48 days |
| 2009 | 24 days |
| 2010 | 59 days |
| 2011 | 32 days |
| 2012 | 29 days |
| 2013 | 43 days |
| 2014 | 23 days |
| 2015 | 51 days |
| 2016 | 22 days |
| 2017 | 57 days |
| 2018 | 53 days |
| 2019 | 20 days |
| 2020 | 27 days |
| 2021 | 51 days |
| 2022 | 33 days |
| 2023 | 34 days |
| 2024 | 31 days |
| 2025 | 28 days |
| 2026 | 45 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
114 years with a frostAcross 114 years with a frost, the median last spring frost at Headworks Portland Wtr B falls on 7 April and the median first autumn frost on 12 November, which leaves a median of 223 days between them.
In 1994 to 2025 the median growing season was 244 days. That is 41 days more than in 1900 to 1938.
Fitted over all years, the growing season changes by +4.3 days per decade at this station.
| Measure | Median, all years | Earliest period (1900 to 1938) | Recent period (1994 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 7 April | 12 April | 23 March | 20 days earlier | -2.5 days per decade |
| First autumn frost | 12 November | 6 November | 20 November | 14 days later | +1.7 days per decade |
| Growing days | 223 days | 203 days | 244 days | 41 days more | +4.3 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
123 years, 1900 to 2025A day with at least 70.9 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 141.4 mm (5.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 70.9 mm (2.8 in) | |
| 5 years | 89.6 mm (3.5 in) | |
| 10 years | 102.0 mm (4.0 in) | |
| 25 years | 117.8 mm (4.6 in) | |
| 50 years | 129.6 mm (5.1 in) | |
| 100 years | 141.4 mm (5.6 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 123 years of values from 1900 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: 172.7 mm (6.8 in) in 1994; 170.2 mm (6.7 in) in 1933; 130.3 mm (5.1 in) in 1921.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Headworks Portland Wtr B, at 1964 and 1991. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1964 ran 0.3 C (0.5 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1991 ran 0.3 C (0.5 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1964 | +0.3 | +0.5 | likely | 5 |
| 1991 | +0.3 | +0.5 | 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.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Headworks Portland Wtr B had a mean temperature of 11.0 C (51.7 F) and 1,971.0 mm (77.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Strawberry Valley 2 (United States, 663 km away), Cushman Powerhouse #2 (United States, 227 km away) and Burnaby Mtn Terminal (Canada, 429 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Strawberry Valley 2 | United States | 663 km (412 mi) | 10.9 C (51.7 F) | 1,985.4 mm (78.2 in) | 0.72 |
| Cushman Powerhouse #2 | United States | 227 km (141 mi) | 10.7 C (51.2 F) | 2,175.0 mm (85.6 in) | 1.08 |
| Burnaby Mtn Terminal | Canada | 429 km (267 mi) | 10.2 C (50.3 F) | 1,867.7 mm (73.5 in) | 1.09 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-15).