Truro Nsac Weather Records (CA008206000)
Record envelope, standing records and threshold days for Truro Nsac (CA008206000), Nova Scotia, Canada, with 57 years of record.
Key Facts for Truro Nsac
- Truro Nsac (CA008206000) is a weather station in Nova Scotia, Canada at 45.37 latitude and -63.30 longitude, 24 m (79 ft) above sea level.
- The station reports from 1910 to 1966, 57 years of record.
- 1,464 records set at Truro Nsac still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Truro Nsac set a daily record precipitation of 17.5 mm (0.7 in) on 22 December 1966.
About the Station
- Location: Nova Scotia, Canada, 45.37 latitude, -63.30 longitude.
- Elevation: 24 m (79 ft).
- Period of record: 1910 to 1966, 57 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 | 17.2 C (63.0 F) | -38.3 C (-36.9 F) | n/a | n/a |
| Feb | 14.4 C (57.9 F) | -35.6 C (-32.1 F) | n/a | n/a |
| Mar | 18.3 C (64.9 F) | -30.0 C (-22.0 F) | n/a | n/a |
| Apr | 29.4 C (84.9 F) | -23.9 C (-11.0 F) | n/a | n/a |
| May | 29.4 C (84.9 F) | -10.6 C (12.9 F) | n/a | n/a |
| Jun | 32.2 C (90.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Jul | 33.3 C (91.9 F) | -0.6 C (30.9 F) | n/a | n/a |
| Aug | 35.6 C (96.1 F) | -1.1 C (30.0 F) | n/a | n/a |
| Sep | 32.8 C (91.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Oct | 25.6 C (78.1 F) | -12.2 C (10.0 F) | n/a | n/a |
| Nov | 22.2 C (72.0 F) | -21.1 C (-6.0 F) | n/a | n/a |
| Dec | 17.8 C (64.0 F) | -32.2 C (-26.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1910 | 45 |
| 1911 | 44 |
| 1912 | 39 |
| 1913 | 43 |
| 1914 | 33 |
| 1915 | 14 |
| 1916 | 28 |
| 1917 | 19 |
| 1918 | 42 |
| 1919 | 25 |
| 1920 | 46 |
| 1921 | 40 |
| 1922 | 34 |
| 1923 | 41 |
| 1924 | 11 |
| 1925 | 28 |
| 1926 | 19 |
| 1927 | 29 |
| 1928 | 10 |
| 1929 | 25 |
| 1930 | 29 |
| 1931 | 20 |
| 1932 | 17 |
| 1933 | 32 |
| 1934 | 37 |
| 1935 | 12 |
| 1936 | 34 |
| 1937 | 26 |
| 1938 | 26 |
| 1939 | 25 |
| 1940 | 17 |
| 1941 | 21 |
| 1942 | 23 |
| 1943 | 21 |
| 1944 | 24 |
| 1945 | 26 |
| 1946 | 29 |
| 1947 | 27 |
| 1948 | 29 |
| 1949 | 27 |
| 1950 | 34 |
| 1951 | 22 |
| 1952 | 15 |
| 1953 | 27 |
| 1954 | 28 |
| 1955 | 16 |
| 1956 | 29 |
| 1957 | 20 |
| 1958 | 11 |
| 1959 | 24 |
| 1960 | 26 |
| 1961 | 20 |
| 1962 | 16 |
| 1963 | 12 |
| 1964 | 18 |
| 1965 | 17 |
| 1966 | 12 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1941-01-30 | Record daily snowfall | Record daily snowfall 35.6 cm (14.0 in) |
| 1961-09-26 | Record high minimum temperature | Record high minimum temperature 22.2 C (72.0 F) |
Wettest Day of Each Month
Apr: 133.4 mm (5.3 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 63.8 mm (2.5 in) | 11 January 1935 |
| Feb | 63.5 mm (2.5 in) | 7 February 1920 |
| Mar | 41.9 mm (1.6 in) | 31 March 1966 |
| Apr | 133.4 mm (5.3 in) | 12 April 1913 |
| May | 64.0 mm (2.5 in) | 2 May 1947 |
| Jun | 55.1 mm (2.2 in) | 16 June 1924 |
| Jul | 69.1 mm (2.7 in) | 7 July 1930 |
| Aug | 92.7 mm (3.6 in) | 14 August 1917 |
| Sep | 116.8 mm (4.6 in) | 22 September 1942 |
| Oct | 79.8 mm (3.1 in) | 2 October 1923 |
| Nov | 53.1 mm (2.1 in) | 6 November 1934 |
| Dec | 59.2 mm (2.3 in) | 10 December 1928 |
Period of Record Coverage
1910 to 1966| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1910 | 365 | 100% | Yes |
| 1911 | 333 | 91% | Yes |
| 1912 | 365 | 100% | Yes |
| 1913 | 358 | 98% | Yes |
| 1914 | 360 | 99% | Yes |
| 1915 | 172 | 47% | No |
| 1916 | 210 | 57% | No |
| 1917 | 171 | 47% | No |
| 1918 | 340 | 93% | Yes |
| 1919 | 338 | 93% | Yes |
| 1920 | 356 | 97% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 364 | 100% | Yes |
| 1923 | 337 | 92% | Yes |
| 1924 | 363 | 99% | Yes |
| 1925 | 364 | 100% | Yes |
| 1926 | 362 | 99% | Yes |
| 1927 | 324 | 89% | No |
| 1928 | 270 | 74% | No |
| 1929 | 315 | 86% | No |
| 1930 | 362 | 99% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 348 | 95% | Yes |
| 1942 | 363 | 99% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 347 | 95% | Yes |
| 1945 | 338 | 93% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 336 | 92% | 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 | 364 | 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 |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 22 December 1966 | Truro Nsac, CA | daily rain | 17.5 mm (0.7 in) | 1.0 mm (0.04 in) | 4 years | 7 of 100 (Routine) |
| 10 December 1966 | Truro Nsac, CA | daily high min (Tie) | 6.7 C (44.1 F) | tie | 16 years | 2 of 100 (Routine) |
| 30 November 1966 | Truro Nsac, CA | daily high min | 11.1 C (52.0 F) | 5.0 C (9.0 F) | 51 years | 29 of 100 (Routine) |
| 28 November 1966 | Truro Nsac, CA | daily high min (Tie) | 8.3 C (46.9 F) | tie | 16 years | 2 of 100 (Routine) |
| 27 November 1966 | Truro Nsac, CA | daily high min | 8.9 C (48.0 F) | 1.7 C (3.1 F) | 20 years | 14 of 100 (Routine) |
| 17 November 1966 | Truro Nsac, CA | daily snowfall | 5.8 cm (2.3 in) | 3.3 cm (1.3 in) | 9 years | 14 of 100 (Routine) |
| 3 November 1966 | Truro Nsac, CA | daily high max (Tie) | 17.8 C (64.0 F) | tie | 12 years | 2 of 100 (Routine) |
| 11 October 1966 | Truro Nsac, CA | daily rain | 35.6 mm (1.4 in) | 13.5 mm (0.5 in) | 44 years | 30 of 100 (Routine) |
| 5 October 1966 | Truro Nsac, CA | daily rain | 28.2 mm (1.1 in) | 6.6 mm (0.26 in) | 0 years | 11 of 100 (Routine) |
| 21 September 1966 | Truro Nsac, CA | daily low min (Tie) | -2.2 C (28.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 10 September 1966 | Truro Nsac, CA | daily high max | 28.3 C (82.9 F) | 1.1 C (2.0 F) | 7 years | 9 of 100 (Routine) |
| 2 August 1966 | Truro Nsac, CA | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 48 years | 22 of 100 (Routine) |
| 25 July 1966 | Truro Nsac, CA | daily high max (Tie) | 29.4 C (84.9 F) | tie | 21 years | 2 of 100 (Routine) |
| 27 May 1966 | Truro Nsac, CA | daily high max | 27.8 C (82.0 F) | 1.1 C (2.0 F) | 21 years | 13 of 100 (Routine) |
| 26 May 1966 | Truro Nsac, CA | daily high max | 27.2 C (81.0 F) | 2.2 C (4.0 F) | 16 years | 13 of 100 (Routine) |
| 8 May 1966 | Truro Nsac, CA | monthly snowfall | 8.1 cm (3.2 in) | 5.6 cm (2.2 in) | 9 years | 28 of 100 (Routine) |
| 29 April 1966 | Truro Nsac, CA | daily low min | -8.3 C (17.1 F) | 2.2 C (4.0 F) | 56 years | 26 of 100 (Routine) |
| 31 March 1966 | Truro Nsac, CA | monthly rain | 41.9 mm (1.6 in) | 4.8 mm (0.19 in) | 41 years | 34 of 100 (Routine) |
| 29 March 1966 | Truro Nsac, CA | daily snowfall (Tie) | 2.5 cm (1.0 in) | tie | 28 years | 3 of 100 (Routine) |
| 27 March 1966 | Truro Nsac, CA | daily snowfall (Tie) | 8.9 cm (3.5 in) | tie | 15 years | 2 of 100 (Routine) |
Climate Trend
45 complete years, 1910 to 1966| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1910 | 5.8 C | +0.02 C |
| 1912 | 4.9 C | -0.88 C |
| 1913 | 6.0 C | +0.26 C |
| 1914 | 4.5 C | -1.23 C |
| 1918 | 4.1 C | -1.64 C |
| 1919 | 5.1 C | -0.64 C |
| 1920 | 5.1 C | -0.67 C |
| 1921 | 5.2 C | -0.53 C |
| 1922 | 4.7 C | -1.08 C |
| 1924 | 4.8 C | -0.92 C |
| 1925 | 5.1 C | -0.62 C |
| 1929 | 5.3 C | -0.40 C |
| 1930 | 6.2 C | +0.43 C |
| 1931 | 6.9 C | +1.13 C |
| 1932 | 6.0 C | +0.22 C |
| 1933 | 5.7 C | -0.09 C |
| 1934 | 4.9 C | -0.88 C |
| 1935 | 5.2 C | -0.59 C |
| 1936 | 5.9 C | +0.20 C |
| 1937 | 6.9 C | +1.15 C |
| 1938 | 6.0 C | +0.25 C |
| 1939 | 5.3 C | -0.47 C |
| 1940 | 5.0 C | -0.72 C |
| 1942 | 6.2 C | +0.46 C |
| 1943 | 5.4 C | -0.34 C |
| 1946 | 5.9 C | +0.15 C |
| 1947 | 6.5 C | +0.79 C |
| 1948 | 5.1 C | -0.66 C |
| 1949 | 6.4 C | +0.66 C |
| 1950 | 5.6 C | -0.10 C |
| 1951 | 6.8 C | +1.01 C |
| 1953 | 7.4 C | +1.61 C |
| 1954 | 6.9 C | +1.20 C |
| 1955 | 6.0 C | +0.21 C |
| 1956 | 5.6 C | -0.16 C |
| 1957 | 6.2 C | +0.49 C |
| 1958 | 6.4 C | +0.62 C |
| 1959 | 6.2 C | +0.50 C |
| 1960 | 7.0 C | +1.28 C |
| 1961 | 6.3 C | +0.53 C |
| 1962 | 5.4 C | -0.34 C |
| 1963 | 5.5 C | -0.22 C |
| 1964 | 5.4 C | -0.30 C |
| 1965 | 5.2 C | -0.54 C |
| 1966 | 6.7 C | +0.95 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1910 to 1966. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 45 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.6) per decade | 1910 to 1966 | 45 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.1 to 0.5) per decade | 1910 to 1966 | 45 | Rise |
| Mean daily minimum | 0.3 C (0.1 to 0.4) per decade | 0.5 F (0.2 to 0.8) per decade | 1910 to 1966 | 45 | 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
1910 to 1966| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 35.6 C (96.1 F) | 1935 | 30.0 C (86.0 F) | 57 |
| Coldest night (TNn) | -38.3 C (-36.9 F) | 1934 | -27.8 C (-18.0 F) | 57 |
| Wettest day (Rx1day) | 133.4 mm (5.3 in) | 1913 | 48.3 mm (1.9 in) | 57 |
| Wettest five days (Rx5day) | 183.7 mm (7.2 in) | 1913 | 78.2 mm (3.1 in) | 57 |
| Longest dry spell (CDD) | 30 days | 1919 | 15 days | 57 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1910 | 30.0 C (86.0 F) |
| 1911 | 31.1 C (88.0 F) |
| 1912 | 30.0 C (86.0 F) |
| 1913 | 29.4 C (84.9 F) |
| 1914 | 31.7 C (89.1 F) |
| 1915 | 17.8 C (64.0 F) |
| 1916 | 30.0 C (86.0 F) |
| 1917 | 29.4 C (84.9 F) |
| 1918 | 29.4 C (84.9 F) |
| 1919 | 29.4 C (84.9 F) |
| 1920 | 32.2 C (90.0 F) |
| 1921 | 32.2 C (90.0 F) |
| 1922 | 28.3 C (82.9 F) |
| 1923 | 28.3 C (82.9 F) |
| 1924 | 29.4 C (84.9 F) |
| 1925 | 28.9 C (84.0 F) |
| 1926 | 32.8 C (91.0 F) |
| 1927 | 30.0 C (86.0 F) |
| 1928 | 32.2 C (90.0 F) |
| 1929 | 28.9 C (84.0 F) |
| 1930 | 32.2 C (90.0 F) |
| 1931 | 31.1 C (88.0 F) |
| 1932 | 30.6 C (87.1 F) |
| 1933 | 32.8 C (91.0 F) |
| 1934 | 30.0 C (86.0 F) |
| 1935 | 35.6 C (96.1 F) |
| 1936 | 28.9 C (84.0 F) |
| 1937 | 32.8 C (91.0 F) |
| 1938 | 30.0 C (86.0 F) |
| 1939 | 33.3 C (91.9 F) |
| 1940 | 28.9 C (84.0 F) |
| 1941 | 30.0 C (86.0 F) |
| 1942 | 32.8 C (91.0 F) |
| 1943 | 30.0 C (86.0 F) |
| 1944 | 35.6 C (96.1 F) |
| 1945 | 30.0 C (86.0 F) |
| 1946 | 30.6 C (87.1 F) |
| 1947 | 34.4 C (93.9 F) |
| 1948 | 31.1 C (88.0 F) |
| 1949 | 33.3 C (91.9 F) |
| 1950 | 28.9 C (84.0 F) |
| 1951 | 28.9 C (84.0 F) |
| 1952 | 32.8 C (91.0 F) |
| 1953 | 30.0 C (86.0 F) |
| 1954 | 28.9 C (84.0 F) |
| 1955 | 32.2 C (90.0 F) |
| 1956 | 31.1 C (88.0 F) |
| 1957 | 29.4 C (84.9 F) |
| 1958 | 28.9 C (84.0 F) |
| 1959 | 32.2 C (90.0 F) |
| 1960 | 33.9 C (93.0 F) |
| 1961 | 31.1 C (88.0 F) |
| 1962 | 28.3 C (82.9 F) |
| 1963 | 31.1 C (88.0 F) |
| 1964 | 29.4 C (84.9 F) |
| 1965 | 32.2 C (90.0 F) |
| 1966 | 30.0 C (86.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1910 | -29.4 C (-20.9 F) |
| 1911 | -27.2 C (-17.0 F) |
| 1912 | -31.7 C (-25.1 F) |
| 1913 | -31.1 C (-24.0 F) |
| 1914 | -32.2 C (-26.0 F) |
| 1915 | -25.6 C (-14.1 F) |
| 1916 | -21.1 C (-6.0 F) |
| 1917 | -27.8 C (-18.0 F) |
| 1918 | -28.9 C (-20.0 F) |
| 1919 | -27.2 C (-17.0 F) |
| 1920 | -32.2 C (-26.0 F) |
| 1921 | -28.3 C (-18.9 F) |
| 1922 | -35.6 C (-32.1 F) |
| 1923 | -31.1 C (-24.0 F) |
| 1924 | -26.7 C (-16.1 F) |
| 1925 | -34.4 C (-29.9 F) |
| 1926 | -29.4 C (-20.9 F) |
| 1927 | -26.1 C (-15.0 F) |
| 1928 | -27.8 C (-18.0 F) |
| 1929 | -27.2 C (-17.0 F) |
| 1930 | -25.6 C (-14.1 F) |
| 1931 | -25.6 C (-14.1 F) |
| 1932 | -25.0 C (-13.0 F) |
| 1933 | -30.0 C (-22.0 F) |
| 1934 | -38.3 C (-36.9 F) |
| 1935 | -28.9 C (-20.0 F) |
| 1936 | -23.9 C (-11.0 F) |
| 1937 | -23.9 C (-11.0 F) |
| 1938 | -30.0 C (-22.0 F) |
| 1939 | -22.8 C (-9.0 F) |
| 1940 | -28.9 C (-20.0 F) |
| 1941 | -25.0 C (-13.0 F) |
| 1942 | -26.7 C (-16.1 F) |
| 1943 | -27.8 C (-18.0 F) |
| 1944 | -23.3 C (-9.9 F) |
| 1945 | -30.6 C (-23.1 F) |
| 1946 | -27.8 C (-18.0 F) |
| 1947 | -22.8 C (-9.0 F) |
| 1948 | -31.1 C (-24.0 F) |
| 1949 | -25.6 C (-14.1 F) |
| 1950 | -25.6 C (-14.1 F) |
| 1951 | -29.4 C (-20.9 F) |
| 1952 | -26.7 C (-16.1 F) |
| 1953 | -18.3 C (-0.9 F) |
| 1954 | -31.7 C (-25.1 F) |
| 1955 | -31.7 C (-25.1 F) |
| 1956 | -25.6 C (-14.1 F) |
| 1957 | -31.7 C (-25.1 F) |
| 1958 | -26.1 C (-15.0 F) |
| 1959 | -24.4 C (-11.9 F) |
| 1960 | -23.9 C (-11.0 F) |
| 1961 | -34.4 C (-29.9 F) |
| 1962 | -27.8 C (-18.0 F) |
| 1963 | -27.2 C (-17.0 F) |
| 1964 | -26.7 C (-16.1 F) |
| 1965 | -25.6 C (-14.1 F) |
| 1966 | -30.6 C (-23.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1910 | 41.9 mm (1.6 in) |
| 1911 | 41.1 mm (1.6 in) |
| 1912 | 60.5 mm (2.4 in) |
| 1913 | 133.4 mm (5.3 in) |
| 1914 | 39.9 mm (1.6 in) |
| 1915 | 55.9 mm (2.2 in) |
| 1916 | 38.1 mm (1.5 in) |
| 1917 | 92.7 mm (3.6 in) |
| 1918 | 71.1 mm (2.8 in) |
| 1919 | 37.1 mm (1.5 in) |
| 1920 | 63.5 mm (2.5 in) |
| 1921 | 36.8 mm (1.4 in) |
| 1922 | 48.3 mm (1.9 in) |
| 1923 | 79.8 mm (3.1 in) |
| 1924 | 55.1 mm (2.2 in) |
| 1925 | 37.1 mm (1.5 in) |
| 1926 | 45.7 mm (1.8 in) |
| 1927 | 54.4 mm (2.1 in) |
| 1928 | 59.2 mm (2.3 in) |
| 1929 | 48.3 mm (1.9 in) |
| 1930 | 69.1 mm (2.7 in) |
| 1931 | 45.7 mm (1.8 in) |
| 1932 | 47.0 mm (1.9 in) |
| 1933 | 43.7 mm (1.7 in) |
| 1934 | 53.1 mm (2.1 in) |
| 1935 | 63.8 mm (2.5 in) |
| 1936 | 55.4 mm (2.2 in) |
| 1937 | 47.0 mm (1.9 in) |
| 1938 | 47.0 mm (1.9 in) |
| 1939 | 48.5 mm (1.9 in) |
| 1940 | 38.1 mm (1.5 in) |
| 1941 | 66.0 mm (2.6 in) |
| 1942 | 116.8 mm (4.6 in) |
| 1943 | 48.3 mm (1.9 in) |
| 1944 | 44.5 mm (1.8 in) |
| 1945 | 33.8 mm (1.3 in) |
| 1946 | 65.8 mm (2.6 in) |
| 1947 | 64.0 mm (2.5 in) |
| 1948 | 47.8 mm (1.9 in) |
| 1949 | 47.2 mm (1.9 in) |
| 1950 | 44.7 mm (1.8 in) |
| 1951 | 54.6 mm (2.1 in) |
| 1952 | 39.1 mm (1.5 in) |
| 1953 | 47.2 mm (1.9 in) |
| 1954 | 50.3 mm (2.0 in) |
| 1955 | 45.2 mm (1.8 in) |
| 1956 | 49.3 mm (1.9 in) |
| 1957 | 38.1 mm (1.5 in) |
| 1958 | 55.1 mm (2.2 in) |
| 1959 | 63.5 mm (2.5 in) |
| 1960 | 36.8 mm (1.4 in) |
| 1961 | 42.7 mm (1.7 in) |
| 1962 | 59.2 mm (2.3 in) |
| 1963 | 43.4 mm (1.7 in) |
| 1964 | 75.7 mm (3.0 in) |
| 1965 | 39.4 mm (1.6 in) |
| 1966 | 41.9 mm (1.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1910 | 108.4 mm (4.3 in) |
| 1911 | 59.3 mm (2.3 in) |
| 1912 | 78.2 mm (3.1 in) |
| 1913 | 183.7 mm (7.2 in) |
| 1914 | 44.9 mm (1.8 in) |
| 1915 | 85.1 mm (3.4 in) |
| 1916 | 68.6 mm (2.7 in) |
| 1917 | 124.5 mm (4.9 in) |
| 1918 | 88.4 mm (3.5 in) |
| 1919 | 50.8 mm (2.0 in) |
| 1920 | 78.7 mm (3.1 in) |
| 1921 | 48.7 mm (1.9 in) |
| 1922 | 87.7 mm (3.5 in) |
| 1923 | 91.4 mm (3.6 in) |
| 1924 | 76.5 mm (3.0 in) |
| 1925 | 75.7 mm (3.0 in) |
| 1926 | 89.4 mm (3.5 in) |
| 1927 | 64.7 mm (2.5 in) |
| 1928 | 74.2 mm (2.9 in) |
| 1929 | 125.3 mm (4.9 in) |
| 1930 | 101.3 mm (4.0 in) |
| 1931 | 77.7 mm (3.1 in) |
| 1932 | 68.1 mm (2.7 in) |
| 1933 | 91.8 mm (3.6 in) |
| 1934 | 100.8 mm (4.0 in) |
| 1935 | 108.2 mm (4.3 in) |
| 1936 | 88.2 mm (3.5 in) |
| 1937 | 97.2 mm (3.8 in) |
| 1938 | 73.3 mm (2.9 in) |
| 1939 | 63.5 mm (2.5 in) |
| 1940 | 57.2 mm (2.3 in) |
| 1941 | 74.9 mm (2.9 in) |
| 1942 | 175.6 mm (6.9 in) |
| 1943 | 82.5 mm (3.2 in) |
| 1944 | 50.9 mm (2.0 in) |
| 1945 | 54.9 mm (2.2 in) |
| 1946 | 81.3 mm (3.2 in) |
| 1947 | 120.6 mm (4.7 in) |
| 1948 | 68.9 mm (2.7 in) |
| 1949 | 72.3 mm (2.8 in) |
| 1950 | 74.9 mm (2.9 in) |
| 1951 | 58.2 mm (2.3 in) |
| 1952 | 59.0 mm (2.3 in) |
| 1953 | 68.6 mm (2.7 in) |
| 1954 | 84.6 mm (3.3 in) |
| 1955 | 67.1 mm (2.6 in) |
| 1956 | 146.6 mm (5.8 in) |
| 1957 | 78.8 mm (3.1 in) |
| 1958 | 89.2 mm (3.5 in) |
| 1959 | 113.0 mm (4.4 in) |
| 1960 | 55.6 mm (2.2 in) |
| 1961 | 82.0 mm (3.2 in) |
| 1962 | 84.0 mm (3.3 in) |
| 1963 | 58.7 mm (2.3 in) |
| 1964 | 95.1 mm (3.7 in) |
| 1965 | 55.9 mm (2.2 in) |
| 1966 | 78.0 mm (3.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1910 | 16 days |
| 1911 | 22 days |
| 1912 | 10 days |
| 1913 | 12 days |
| 1914 | 18 days |
| 1915 | 16 days |
| 1916 | 14 days |
| 1917 | 20 days |
| 1918 | 24 days |
| 1919 | 30 days |
| 1920 | 25 days |
| 1921 | 18 days |
| 1922 | 11 days |
| 1923 | 14 days |
| 1924 | 14 days |
| 1925 | 17 days |
| 1926 | 21 days |
| 1927 | 11 days |
| 1928 | 15 days |
| 1929 | 19 days |
| 1930 | 17 days |
| 1931 | 16 days |
| 1932 | 15 days |
| 1933 | 12 days |
| 1934 | 17 days |
| 1935 | 15 days |
| 1936 | 8 days |
| 1937 | 15 days |
| 1938 | 17 days |
| 1939 | 16 days |
| 1940 | 12 days |
| 1941 | 9 days |
| 1942 | 15 days |
| 1943 | 10 days |
| 1944 | 20 days |
| 1945 | 26 days |
| 1946 | 12 days |
| 1947 | 14 days |
| 1948 | 13 days |
| 1949 | 13 days |
| 1950 | 20 days |
| 1951 | 13 days |
| 1952 | 9 days |
| 1953 | 14 days |
| 1954 | 15 days |
| 1955 | 8 days |
| 1956 | 15 days |
| 1957 | 11 days |
| 1958 | 11 days |
| 1959 | 11 days |
| 1960 | 16 days |
| 1961 | 16 days |
| 1962 | 19 days |
| 1963 | 14 days |
| 1964 | 19 days |
| 1965 | 16 days |
| 1966 | 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
45 years with a frostAcross 45 years with a frost, the median last spring frost at Truro Nsac falls on 7 June and the median first autumn frost on 17 September, which leaves a median of 102 days between them.
Fitted over all years, the growing season changes by +3.5 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1933 to 1966) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 7 June | n/a | 9 June | n/a | -0.6 days per decade |
| First autumn frost | 17 September | n/a | 18 September | n/a | +2.9 days per decade |
| Growing days | 102 days | n/a | 103 days | n/a | +3.5 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
53 years, 1910 to 1966A day with at least 48.4 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 125.9 mm (5.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 48.4 mm (1.9 in) | |
| 5 years | 61.5 mm (2.4 in) | |
| 10 years | 72.6 mm (2.9 in) | |
| 25 years | 90.2 mm (3.6 in) | |
| 50 years | 106.4 mm (4.2 in) | |
| 100 years | 125.9 mm (5.0 in) | Longer than the 53 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, 53 years of values from 1910 to 1966.
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: 133.4 mm (5.3 in) in 1913; 116.8 mm (4.6 in) in 1942; 79.8 mm (3.1 in) in 1923.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Truro Nsac, at 1925 and 1954. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1925 ran 0.3 C (0.6 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1954 ran 0.2 C (0.4 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1925 | +0.3 | +0.6 | likely | 5 |
| 1954 | +0.2 | +0.4 | 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 (2025-12-31).