Tweed Weather Records (CA006159010)
Record envelope, standing records and threshold days for Tweed (CA006159010), Ontario, Canada, with 48 years of record.
Key Facts for Tweed
- Tweed (CA006159010) is a weather station in Ontario, Canada at 44.50 latitude and -77.28 longitude, 145 m (476 ft) above sea level.
- The station reports from 1925 to 1972, 48 years of record.
- 1,464 records set at Tweed still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Tweed tied a daily record low minimum temperature of -3.9 C (25.0 F) on 26 April 1972.
About the Station
- Location: Ontario, Canada, 44.50 latitude, -77.28 longitude.
- Elevation: 145 m (476 ft).
- Period of record: 1925 to 1972, 48 years.
- Eligible elements: tmax, tmin, prcp, snow.
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 | 14.4 C (57.9 F) | -37.2 C (-35.0 F) | n/a | n/a |
| Feb | 12.2 C (54.0 F) | -40.0 C (-40.0 F) | n/a | n/a |
| Mar | 25.6 C (78.1 F) | -29.4 C (-20.9 F) | n/a | n/a |
| Apr | 32.8 C (91.0 F) | -17.2 C (1.0 F) | n/a | n/a |
| May | 33.3 C (91.9 F) | -7.2 C (19.0 F) | n/a | n/a |
| Jun | 36.1 C (97.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Jul | 40.6 C (105.1 F) | 4.4 C (39.9 F) | n/a | n/a |
| Aug | 36.7 C (98.1 F) | 1.7 C (35.1 F) | n/a | n/a |
| Sep | 35.6 C (96.1 F) | -4.4 C (24.1 F) | n/a | n/a |
| Oct | 28.9 C (84.0 F) | -12.2 C (10.0 F) | n/a | n/a |
| Nov | 24.4 C (75.9 F) | -20.6 C (-5.1 F) | n/a | n/a |
| Dec | 15.6 C (60.1 F) | -38.9 C (-38.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1925 | 38 |
| 1926 | 40 |
| 1927 | 28 |
| 1928 | 24 |
| 1929 | 33 |
| 1930 | 29 |
| 1931 | 32 |
| 1932 | 37 |
| 1933 | 59 |
| 1934 | 55 |
| 1935 | 29 |
| 1936 | 50 |
| 1937 | 20 |
| 1938 | 23 |
| 1939 | 27 |
| 1940 | 37 |
| 1941 | 32 |
| 1942 | 26 |
| 1943 | 29 |
| 1944 | 25 |
| 1945 | 22 |
| 1946 | 59 |
| 1947 | 24 |
| 1948 | 30 |
| 1949 | 33 |
| 1950 | 27 |
| 1951 | 27 |
| 1952 | 21 |
| 1953 | 31 |
| 1954 | 37 |
| 1955 | 30 |
| 1956 | 38 |
| 1957 | 34 |
| 1958 | 20 |
| 1959 | 32 |
| 1960 | 13 |
| 1961 | 27 |
| 1962 | 30 |
| 1963 | 27 |
| 1964 | 42 |
| 1965 | 38 |
| 1966 | 24 |
| 1967 | 24 |
| 1968 | 29 |
| 1969 | 21 |
| 1970 | 21 |
| 1971 | 20 |
| 1972 | 10 |
Wettest Day of Each Month
Aug: 92.7 mm (3.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 54.4 mm (2.1 in) | 14 January 1940 |
| Feb | 48.5 mm (1.9 in) | 3 February 1972 |
| Mar | 86.6 mm (3.4 in) | 17 March 1936 |
| Apr | 44.5 mm (1.8 in) | 27 April 1956 |
| May | 60.5 mm (2.4 in) | 11 May 1943 |
| Jun | 63.5 mm (2.5 in) | 15 June 1956 |
| Jul | 71.1 mm (2.8 in) | 5 July 1951 |
| Aug | 92.7 mm (3.6 in) | 4 August 1953 |
| Sep | 71.4 mm (2.8 in) | 21 September 1938 |
| Oct | 74.9 mm (2.9 in) | 15 October 1955 |
| Nov | 40.4 mm (1.6 in) | 13 November 1937 |
| Dec | 44.2 mm (1.7 in) | 4 December 1961 |
Period of Record Coverage
1925 to 1972| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1925 | 270 | 74% | No |
| 1926 | 362 | 99% | Yes |
| 1927 | 363 | 99% | Yes |
| 1928 | 336 | 92% | Yes |
| 1929 | 303 | 83% | No |
| 1930 | 361 | 99% | Yes |
| 1931 | 360 | 99% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 244 | 67% | No |
| 1945 | 212 | 58% | No |
| 1946 | 305 | 84% | No |
| 1947 | 360 | 99% | Yes |
| 1948 | 364 | 99% | Yes |
| 1949 | 301 | 82% | No |
| 1950 | 325 | 89% | No |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 121 | 33% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 26 April 1972 | Tweed, CA | daily low min (Tie) | -3.9 C (25.0 F) | tie | 39 years | 3 of 100 (Routine) |
| 8 April 1972 | Tweed, CA | daily low min | -13.9 C (7.0 F) | 5.6 C (10.1 F) | 44 years | 29 of 100 (Routine) |
| 7 April 1972 | Tweed, CA | monthly low min | -17.2 C (1.0 F) | 2.8 C (5.0 F) | 18 years | 25 of 100 (Routine) |
| 7 April 1972 | Tweed, CA | daily low max | -1.7 C (28.9 F) | 2.3 C (4.1 F) | 33 years | 16 of 100 (Routine) |
| 6 April 1972 | Tweed, CA | daily low max | -3.9 C (25.0 F) | 3.3 C (5.9 F) | 29 years | 17 of 100 (Routine) |
| 5 April 1972 | Tweed, CA | daily low max | 0.6 C (33.1 F) | 1.1 C (2.0 F) | 46 years | 18 of 100 (Routine) |
| 22 March 1972 | Tweed, CA | daily rain | 32.0 mm (1.3 in) | 14.2 mm (0.6 in) | 40 years | 33 of 100 (Routine) |
| 11 March 1972 | Tweed, CA | daily low min | -21.1 C (-6.0 F) | 0.5 C (0.9 F) | 11 years | 7 of 100 (Routine) |
| 29 February 1972 | Tweed, CA | daily high max (Tie) | 2.8 C (37.0 F) | tie | 40 years | 4 of 100 (Routine) |
| 25 February 1972 | Tweed, CA | daily low min | -28.9 C (-20.0 F) | 1.7 C (3.1 F) | 44 years | 19 of 100 (Routine) |
| 23 February 1972 | Tweed, CA | daily low max | -11.7 C (10.9 F) | 1.1 C (2.0 F) | 37 years | 17 of 100 (Routine) |
| 23 February 1972 | Tweed, CA | daily low min | -33.3 C (-27.9 F) | 3.3 C (5.9 F) | 32 years | 17 of 100 (Routine) |
| 22 February 1972 | Tweed, CA | daily low max | -12.8 C (9.0 F) | 0.6 C (1.1 F) | 8 years | 7 of 100 (Routine) |
| 11 February 1972 | Tweed, CA | daily low min (Tie) | -28.9 C (-20.0 F) | tie | 30 years | 3 of 100 (Routine) |
| 3 February 1972 | Tweed, CA | monthly snowfall | 48.5 cm (19.1 in) | 16.7 cm (6.6 in) | 11 years | 48 of 100 (Notable) |
| 3 February 1972 | Tweed, CA | monthly rain | 48.5 mm (1.9 in) | 14.2 mm (0.6 in) | 6 years | 38 of 100 (Notable) |
| 4 January 1972 | Tweed, CA | daily snowfall | 8.6 cm (3.4 in) | 1.0 cm (0.4 in) | 44 years | 19 of 100 (Routine) |
| 16 December 1971 | Tweed, CA | daily high max (Tie) | 6.1 C (43.0 F) | tie | 42 years | 4 of 100 (Routine) |
| 15 December 1971 | Tweed, CA | daily high max | 8.9 C (48.0 F) | 3.3 C (5.9 F) | 14 years | 13 of 100 (Routine) |
| 11 December 1971 | Tweed, CA | daily high min | 3.3 C (37.9 F) | 0.5 C (0.9 F) | 18 years | 9 of 100 (Routine) |
Climate Trend
40 complete years, 1926 to 1971| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1926 | 4.7 C | -1.79 C |
| 1927 | 6.7 C | +0.14 C |
| 1930 | 7.2 C | +0.71 C |
| 1931 | 8.1 C | +1.53 C |
| 1932 | 7.1 C | +0.58 C |
| 1933 | 6.7 C | +0.22 C |
| 1934 | 5.6 C | -0.91 C |
| 1935 | 6.0 C | -0.54 C |
| 1936 | 6.1 C | -0.44 C |
| 1937 | 7.4 C | +0.89 C |
| 1938 | 7.2 C | +0.64 C |
| 1939 | 6.0 C | -0.56 C |
| 1940 | 5.3 C | -1.26 C |
| 1941 | 6.6 C | +0.12 C |
| 1942 | 6.7 C | +0.13 C |
| 1943 | 5.8 C | -0.73 C |
| 1947 | 6.6 C | +0.10 C |
| 1949 | 7.8 C | +1.27 C |
| 1950 | 6.4 C | -0.10 C |
| 1951 | 6.7 C | +0.14 C |
| 1952 | 7.7 C | +1.14 C |
| 1953 | 8.2 C | +1.65 C |
| 1954 | 6.8 C | +0.26 C |
| 1955 | 7.2 C | +0.64 C |
| 1956 | 5.9 C | -0.62 C |
| 1957 | 6.8 C | +0.29 C |
| 1958 | 5.9 C | -0.65 C |
| 1959 | 6.8 C | +0.25 C |
| 1960 | 6.5 C | 0.00 C |
| 1961 | 6.7 C | +0.18 C |
| 1962 | 6.1 C | -0.43 C |
| 1963 | 5.9 C | -0.66 C |
| 1964 | 6.8 C | +0.23 C |
| 1965 | 5.8 C | -0.73 C |
| 1966 | 6.4 C | -0.10 C |
| 1967 | 6.2 C | -0.37 C |
| 1968 | 6.2 C | -0.28 C |
| 1969 | 6.5 C | +0.01 C |
| 1970 | 6.0 C | -0.55 C |
| 1971 | 6.3 C | -0.27 C |
The fitted trend in annual mean temperature here over 1926 to 1971 is -0.04 C (-0.22 to 0.13) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.4 to 0.2) 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 | -0.04 C (-0.22 to 0.13) per decade | -0.1 F (-0.4 to 0.2) per decade | 1926 to 1971 | 40 | Not clearly different from zero |
| Mean daily maximum | -0.3 C (-0.4 to -0.1) per decade | -0.5 F (-0.8 to -0.1) per decade | 1926 to 1971 | 40 | Fall |
| Mean daily minimum | 0.18 C (-0.04 to 0.39) per decade | 0.3 F (-0.1 to 0.7) per decade | 1926 to 1971 | 40 | Not clearly different from zero |
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
1925 to 1972| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.6 C (105.1 F) | 1931 | 33.9 C (93.0 F) | 48 |
| Coldest night (TNn) | -40.0 C (-40.0 F) | 1934 | -30.0 C (-22.0 F) | 48 |
| Wettest day (Rx1day) | 92.7 mm (3.6 in) | 1953 | 43.9 mm (1.7 in) | 47 |
| Wettest five days (Rx5day) | 153.1 mm (6.0 in) | 1955 | 67.0 mm (2.6 in) | 47 |
| Longest dry spell (CDD) | 29 days | 1947 | 15 days | 47 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1925 | 34.4 C (93.9 F) |
| 1926 | 33.9 C (93.0 F) |
| 1927 | 36.1 C (97.0 F) |
| 1928 | 33.9 C (93.0 F) |
| 1929 | 35.6 C (96.1 F) |
| 1930 | 32.8 C (91.0 F) |
| 1931 | 40.6 C (105.1 F) |
| 1932 | 33.3 C (91.9 F) |
| 1933 | 36.7 C (98.1 F) |
| 1934 | 35.0 C (95.0 F) |
| 1935 | 35.6 C (96.1 F) |
| 1936 | 40.6 C (105.1 F) |
| 1937 | 36.1 C (97.0 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 35.6 C (96.1 F) |
| 1940 | 32.2 C (90.0 F) |
| 1941 | 36.1 C (97.0 F) |
| 1942 | 32.8 C (91.0 F) |
| 1943 | 31.1 C (88.0 F) |
| 1944 | 36.1 C (97.0 F) |
| 1945 | 31.1 C (88.0 F) |
| 1946 | 32.8 C (91.0 F) |
| 1947 | 32.2 C (90.0 F) |
| 1948 | 36.1 C (97.0 F) |
| 1949 | 36.1 C (97.0 F) |
| 1950 | 31.1 C (88.0 F) |
| 1951 | 30.0 C (86.0 F) |
| 1952 | 33.9 C (93.0 F) |
| 1953 | 35.0 C (95.0 F) |
| 1954 | 31.1 C (88.0 F) |
| 1955 | 36.7 C (98.1 F) |
| 1956 | 33.9 C (93.0 F) |
| 1957 | 32.8 C (91.0 F) |
| 1958 | 31.1 C (88.0 F) |
| 1959 | 33.9 C (93.0 F) |
| 1960 | 31.1 C (88.0 F) |
| 1961 | 31.1 C (88.0 F) |
| 1962 | 33.3 C (91.9 F) |
| 1963 | 35.6 C (96.1 F) |
| 1964 | 34.4 C (93.9 F) |
| 1965 | 32.2 C (90.0 F) |
| 1966 | 35.6 C (96.1 F) |
| 1967 | 30.6 C (87.1 F) |
| 1968 | 33.9 C (93.0 F) |
| 1969 | 33.3 C (91.9 F) |
| 1970 | 32.2 C (90.0 F) |
| 1971 | 32.8 C (91.0 F) |
| 1972 | 21.7 C (71.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1925 | -29.4 C (-20.9 F) |
| 1926 | -27.8 C (-18.0 F) |
| 1927 | -29.4 C (-20.9 F) |
| 1928 | -27.2 C (-17.0 F) |
| 1929 | -28.9 C (-20.0 F) |
| 1930 | -31.7 C (-25.1 F) |
| 1931 | -28.3 C (-18.9 F) |
| 1932 | -26.1 C (-15.0 F) |
| 1933 | -38.9 C (-38.0 F) |
| 1934 | -40.0 C (-40.0 F) |
| 1935 | -33.9 C (-29.0 F) |
| 1936 | -29.4 C (-20.9 F) |
| 1937 | -21.7 C (-7.1 F) |
| 1938 | -29.4 C (-20.9 F) |
| 1939 | -32.8 C (-27.0 F) |
| 1940 | -31.7 C (-25.1 F) |
| 1941 | -28.9 C (-20.0 F) |
| 1942 | -34.4 C (-29.9 F) |
| 1943 | -36.1 C (-33.0 F) |
| 1944 | -30.0 C (-22.0 F) |
| 1945 | -35.6 C (-32.1 F) |
| 1946 | -30.0 C (-22.0 F) |
| 1947 | -28.9 C (-20.0 F) |
| 1948 | -31.7 C (-25.1 F) |
| 1949 | -23.9 C (-11.0 F) |
| 1950 | -28.9 C (-20.0 F) |
| 1951 | -32.8 C (-27.0 F) |
| 1952 | -31.1 C (-24.0 F) |
| 1953 | -20.6 C (-5.1 F) |
| 1954 | -32.8 C (-27.0 F) |
| 1955 | -33.3 C (-27.9 F) |
| 1956 | -27.8 C (-18.0 F) |
| 1957 | -36.1 C (-33.0 F) |
| 1958 | -28.9 C (-20.0 F) |
| 1959 | -27.8 C (-18.0 F) |
| 1960 | -27.2 C (-17.0 F) |
| 1961 | -27.2 C (-17.0 F) |
| 1962 | -33.3 C (-27.9 F) |
| 1963 | -30.6 C (-23.1 F) |
| 1964 | -26.7 C (-16.1 F) |
| 1965 | -30.0 C (-22.0 F) |
| 1966 | -27.8 C (-18.0 F) |
| 1967 | -31.1 C (-24.0 F) |
| 1968 | -34.4 C (-29.9 F) |
| 1969 | -28.9 C (-20.0 F) |
| 1970 | -36.1 C (-33.0 F) |
| 1971 | -37.2 C (-35.0 F) |
| 1972 | -33.3 C (-27.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1925 | 60.5 mm (2.4 in) |
| 1926 | 44.7 mm (1.8 in) |
| 1927 | 31.0 mm (1.2 in) |
| 1928 | 63.0 mm (2.5 in) |
| 1929 | 42.4 mm (1.7 in) |
| 1930 | 42.7 mm (1.7 in) |
| 1931 | 38.6 mm (1.5 in) |
| 1932 | 43.9 mm (1.7 in) |
| 1933 | 49.3 mm (1.9 in) |
| 1934 | 53.6 mm (2.1 in) |
| 1935 | 60.7 mm (2.4 in) |
| 1936 | 86.6 mm (3.4 in) |
| 1937 | 51.8 mm (2.0 in) |
| 1938 | 71.4 mm (2.8 in) |
| 1939 | 43.9 mm (1.7 in) |
| 1940 | 54.4 mm (2.1 in) |
| 1941 | 34.5 mm (1.4 in) |
| 1942 | 37.6 mm (1.5 in) |
| 1943 | 60.5 mm (2.4 in) |
| 1944 | 29.5 mm (1.2 in) |
| 1945 | 66.3 mm (2.6 in) |
| 1946 | 30.5 mm (1.2 in) |
| 1947 | 73.7 mm (2.9 in) |
| 1948 | 49.3 mm (1.9 in) |
| 1949 | n/a |
| 1950 | 19.1 mm (0.8 in) |
| 1951 | 71.1 mm (2.8 in) |
| 1952 | 39.4 mm (1.6 in) |
| 1953 | 92.7 mm (3.6 in) |
| 1954 | 30.5 mm (1.2 in) |
| 1955 | 74.9 mm (2.9 in) |
| 1956 | 63.5 mm (2.5 in) |
| 1957 | 40.6 mm (1.6 in) |
| 1958 | 36.8 mm (1.4 in) |
| 1959 | 27.9 mm (1.1 in) |
| 1960 | 33.0 mm (1.3 in) |
| 1961 | 44.2 mm (1.7 in) |
| 1962 | 36.6 mm (1.4 in) |
| 1963 | 48.5 mm (1.9 in) |
| 1964 | 34.8 mm (1.4 in) |
| 1965 | 34.3 mm (1.4 in) |
| 1966 | 37.6 mm (1.5 in) |
| 1967 | 49.0 mm (1.9 in) |
| 1968 | 33.5 mm (1.3 in) |
| 1969 | 48.3 mm (1.9 in) |
| 1970 | 34.8 mm (1.4 in) |
| 1971 | 40.9 mm (1.6 in) |
| 1972 | 48.5 mm (1.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1925 | 64.1 mm (2.5 in) |
| 1926 | 55.4 mm (2.2 in) |
| 1927 | 74.0 mm (2.9 in) |
| 1928 | 80.6 mm (3.2 in) |
| 1929 | 71.6 mm (2.8 in) |
| 1930 | 68.4 mm (2.7 in) |
| 1931 | 67.0 mm (2.6 in) |
| 1932 | 65.5 mm (2.6 in) |
| 1933 | 51.6 mm (2.0 in) |
| 1934 | 78.5 mm (3.1 in) |
| 1935 | 97.3 mm (3.8 in) |
| 1936 | 109.0 mm (4.3 in) |
| 1937 | 64.5 mm (2.5 in) |
| 1938 | 92.5 mm (3.6 in) |
| 1939 | 88.6 mm (3.5 in) |
| 1940 | 113.5 mm (4.5 in) |
| 1941 | 65.3 mm (2.6 in) |
| 1942 | 74.4 mm (2.9 in) |
| 1943 | 68.1 mm (2.7 in) |
| 1944 | 41.6 mm (1.6 in) |
| 1945 | 80.3 mm (3.2 in) |
| 1946 | 62.5 mm (2.5 in) |
| 1947 | 74.0 mm (2.9 in) |
| 1948 | 75.7 mm (3.0 in) |
| 1949 | n/a |
| 1950 | 31.1 mm (1.2 in) |
| 1951 | 77.2 mm (3.0 in) |
| 1952 | 53.6 mm (2.1 in) |
| 1953 | 92.7 mm (3.6 in) |
| 1954 | 47.2 mm (1.9 in) |
| 1955 | 153.1 mm (6.0 in) |
| 1956 | 66.3 mm (2.6 in) |
| 1957 | 55.3 mm (2.2 in) |
| 1958 | 46.7 mm (1.8 in) |
| 1959 | 59.5 mm (2.3 in) |
| 1960 | 46.0 mm (1.8 in) |
| 1961 | 71.3 mm (2.8 in) |
| 1962 | 49.3 mm (1.9 in) |
| 1963 | 59.4 mm (2.3 in) |
| 1964 | 38.1 mm (1.5 in) |
| 1965 | 75.5 mm (3.0 in) |
| 1966 | 81.8 mm (3.2 in) |
| 1967 | 71.1 mm (2.8 in) |
| 1968 | 53.9 mm (2.1 in) |
| 1969 | 84.5 mm (3.3 in) |
| 1970 | 48.7 mm (1.9 in) |
| 1971 | 66.0 mm (2.6 in) |
| 1972 | 53.4 mm (2.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1925 | 22 days |
| 1926 | 13 days |
| 1927 | 12 days |
| 1928 | 12 days |
| 1929 | 14 days |
| 1930 | 17 days |
| 1931 | 15 days |
| 1932 | 11 days |
| 1933 | 9 days |
| 1934 | 17 days |
| 1935 | 17 days |
| 1936 | 25 days |
| 1937 | 13 days |
| 1938 | 22 days |
| 1939 | 20 days |
| 1940 | 12 days |
| 1941 | 18 days |
| 1942 | 23 days |
| 1943 | 12 days |
| 1944 | 21 days |
| 1945 | 12 days |
| 1946 | 10 days |
| 1947 | 29 days |
| 1948 | 17 days |
| 1949 | n/a |
| 1950 | 7 days |
| 1951 | 12 days |
| 1952 | 19 days |
| 1953 | 11 days |
| 1954 | 12 days |
| 1955 | 16 days |
| 1956 | 15 days |
| 1957 | 22 days |
| 1958 | 18 days |
| 1959 | 15 days |
| 1960 | 13 days |
| 1961 | 13 days |
| 1962 | 18 days |
| 1963 | 18 days |
| 1964 | 15 days |
| 1965 | 12 days |
| 1966 | 11 days |
| 1967 | 20 days |
| 1968 | 20 days |
| 1969 | 16 days |
| 1970 | 27 days |
| 1971 | 13 days |
| 1972 | 8 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 Tweed falls on 11 May and the median first autumn frost on 27 September, which leaves a median of 139 days between them.
Fitted over all years, the growing season changes by -0.6 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1938 to 1971) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 11 May | n/a | 11 May | n/a | +1.6 days per decade |
| First autumn frost | 27 September | n/a | 27 September | n/a | +1.1 days per decade |
| Growing days | 139 days | n/a | 138 days | n/a | -0.6 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
38 years, 1926 to 1971A day with at least 43.9 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 110.6 mm (4.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 43.9 mm (1.7 in) | |
| 5 years | 57.6 mm (2.3 in) | |
| 10 years | 68.1 mm (2.7 in) | |
| 25 years | 83.3 mm (3.3 in) | |
| 50 years | 96.3 mm (3.8 in) | Longer than the 38 years of record |
| 100 years | 110.6 mm (4.4 in) | Longer than the 38 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, 38 years of values from 1926 to 1971.
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: 92.7 mm (3.6 in) in 1953; 86.6 mm (3.4 in) in 1936; 74.9 mm (2.9 in) in 1955.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Tweed, at 1939. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1939 ran 0.2 C (0.3 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1939 | -0.2 | -0.3 | possible | 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 (2026-10-17).