Simcoe Weather Records (CA006137735)
Record envelope, standing records and threshold days for Simcoe (CA006137735), Ontario, Canada, with 96 years of record.
Key Facts for Simcoe
- Simcoe (CA006137735) is a weather station in Ontario, Canada at 42.87 latitude and -80.33 longitude, 223 m (732 ft) above sea level.
- The station reports from 1866 to 1961, 96 years of record.
- 1,464 records set at Simcoe still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Simcoe set a daily record high minimum temperature of 25.6 C (78.1 F) on 23 July 1961.
About the Station
- Location: Ontario, Canada, 42.87 latitude, -80.33 longitude.
- Elevation: 223 m (732 ft).
- Period of record: 1866 to 1961, 96 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 | 18.3 C (64.9 F) | -37.8 C (-36.0 F) | n/a | n/a |
| Feb | 17.8 C (64.0 F) | -32.8 C (-27.0 F) | n/a | n/a |
| Mar | 26.1 C (79.0 F) | -28.3 C (-18.9 F) | n/a | n/a |
| Apr | 31.1 C (88.0 F) | -15.6 C (3.9 F) | n/a | n/a |
| May | 35.6 C (96.1 F) | -6.7 C (19.9 F) | n/a | n/a |
| Jun | 36.7 C (98.1 F) | -1.1 C (30.0 F) | n/a | n/a |
| Jul | 40.0 C (104.0 F) | 3.3 C (37.9 F) | n/a | n/a |
| Aug | 36.1 C (97.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Sep | 35.6 C (96.1 F) | -3.3 C (26.1 F) | n/a | n/a |
| Oct | 30.0 C (86.0 F) | -9.4 C (15.1 F) | n/a | n/a |
| Nov | 24.4 C (75.9 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Dec | 16.7 C (62.1 F) | -31.1 C (-24.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1866 | 19 |
| 1867 | 19 |
| 1868 | 22 |
| 1869 | 16 |
| 1870 | 9 |
| 1871 | 30 |
| 1872 | 15 |
| 1873 | 19 |
| 1874 | 2 |
| 1877 | 12 |
| 1878 | 18 |
| 1879 | 35 |
| 1880 | 37 |
| 1881 | 52 |
| 1882 | 20 |
| 1883 | 16 |
| 1884 | 25 |
| 1885 | 44 |
| 1886 | 23 |
| 1887 | 16 |
| 1888 | 5 |
| 1920 | 15 |
| 1921 | 27 |
| 1922 | 24 |
| 1923 | 23 |
| 1924 | 23 |
| 1925 | 35 |
| 1926 | 22 |
| 1927 | 26 |
| 1928 | 21 |
| 1929 | 30 |
| 1930 | 29 |
| 1931 | 34 |
| 1932 | 36 |
| 1933 | 36 |
| 1934 | 38 |
| 1935 | 17 |
| 1936 | 38 |
| 1937 | 16 |
| 1938 | 26 |
| 1939 | 15 |
| 1940 | 28 |
| 1941 | 27 |
| 1942 | 25 |
| 1944 | 2 |
| 1945 | 43 |
| 1946 | 33 |
| 1947 | 26 |
| 1948 | 17 |
| 1949 | 35 |
| 1950 | 23 |
| 1951 | 23 |
| 1952 | 16 |
| 1953 | 19 |
| 1954 | 25 |
| 1955 | 23 |
| 1956 | 13 |
| 1957 | 26 |
| 1958 | 19 |
| 1959 | 24 |
| 1960 | 21 |
| 1961 | 11 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1933-07-23 | Record high maximum temperature | Record high maximum temperature 37.8 C (100.0 F) |
| 1934-02-08 | Record low maximum temperature | Record low maximum temperature -24.4 C (-11.9 F) |
| 1936-07-08 | Record high maximum temperature | Record high maximum temperature 38.3 C (100.9 F) |
| 1936-07-09 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 1937-07-16 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 1937-09-03 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
Wettest Day of Each Month
Nov: 115.3 mm (4.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 52.8 mm (2.1 in) | 13 January 1937 |
| Feb | 51.1 mm (2.0 in) | 19 February 1939 |
| Mar | 61.0 mm (2.4 in) | 5 March 1881 |
| Apr | 69.6 mm (2.7 in) | 25 April 1937 |
| May | 80.8 mm (3.2 in) | 13 May 1868 |
| Jun | 61.7 mm (2.4 in) | 17 June 1881 |
| Jul | 78.7 mm (3.1 in) | 18 July 1942 |
| Aug | 81.8 mm (3.2 in) | 29 August 1959 |
| Sep | 100.6 mm (4.0 in) | 14 September 1878 |
| Oct | 102.9 mm (4.1 in) | 1 October 1945 |
| Nov | 115.3 mm (4.5 in) | 10 November 1868 |
| Dec | 86.1 mm (3.4 in) | 21 December 1867 |
Period of Record Coverage
1866 to 1961| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1866 | 239 | 65% | No |
| 1867 | 313 | 86% | No |
| 1868 | 314 | 86% | No |
| 1869 | 316 | 87% | No |
| 1870 | 313 | 86% | No |
| 1871 | 308 | 84% | No |
| 1872 | 314 | 86% | No |
| 1873 | 311 | 85% | No |
| 1874 | 77 | 21% | No |
| 1877 | 313 | 86% | No |
| 1878 | 317 | 87% | No |
| 1879 | 314 | 86% | No |
| 1880 | 314 | 86% | No |
| 1881 | 313 | 86% | No |
| 1882 | 310 | 85% | No |
| 1883 | 314 | 86% | No |
| 1884 | 313 | 86% | No |
| 1885 | 313 | 86% | No |
| 1886 | 313 | 86% | No |
| 1887 | 313 | 86% | No |
| 1888 | 48 | 13% | No |
| 1920 | 184 | 50% | No |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 366 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 364 | 100% | Yes |
| 1935 | 363 | 99% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 364 | 100% | Yes |
| 1942 | 328 | 90% | No |
| 1944 | 69 | 19% | No |
| 1945 | 362 | 99% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 210 | 58% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 23 July 1961 | Simcoe, CA | daily high min | 25.6 C (78.1 F) | 3.4 C (6.1 F) | 26 years | 24 of 100 (Routine) |
| 5 July 1961 | Simcoe, CA | monthly low min | 3.3 C (37.9 F) | 0.6 C (1.1 F) | 31 years | 29 of 100 (Routine) |
| 3 July 1961 | Simcoe, CA | daily low max (Tie) | 19.4 C (66.9 F) | tie | 78 years | 8 of 100 (Routine) |
| 27 June 1961 | Simcoe, CA | daily low min | 5.6 C (42.1 F) | 1.1 C (2.0 F) | 32 years | 20 of 100 (Routine) |
| 26 June 1961 | Simcoe, CA | daily low min | 5.6 C (42.1 F) | 0.5 C (0.9 F) | 39 years | 21 of 100 (Routine) |
| 25 June 1961 | Simcoe, CA | daily low max (Tie) | 17.2 C (63.0 F) | tie | 4 years | 2 of 100 (Routine) |
| 16 June 1961 | Simcoe, CA | daily low min (Tie) | 2.8 C (37.0 F) | tie | 34 years | 4 of 100 (Routine) |
| 12 June 1961 | Simcoe, CA | daily high max (Tie) | 31.7 C (89.1 F) | tie | 12 years | 3 of 100 (Routine) |
| 1 June 1961 | Simcoe, CA | daily rain | 32.0 mm (1.3 in) | 9.4 mm (0.37 in) | 78 years | 41 of 100 (Notable) |
| 30 May 1961 | Simcoe, CA | daily low min (Tie) | 0.0 C (32.0 F) | tie | 12 years | 3 of 100 (Routine) |
| 27 May 1961 | Simcoe, CA | daily low max | 11.7 C (53.1 F) | 0.5 C (0.9 F) | 91 years | 36 of 100 (Notable) |
| 26 May 1961 | Simcoe, CA | daily low max | 6.7 C (44.1 F) | 3.3 C (5.9 F) | 31 years | 23 of 100 (Routine) |
| 25 May 1961 | Simcoe, CA | daily rain | 17.5 mm (0.7 in) | 2.5 mm (0.10 in) | 2 years | 11 of 100 (Routine) |
| 21 May 1961 | Simcoe, CA | daily low max (Tie) | 13.3 C (55.9 F) | tie | 93 years | 9 of 100 (Routine) |
| 18 May 1961 | Simcoe, CA | daily low max (Tie) | 10.0 C (50.0 F) | tie | 16 years | 3 of 100 (Routine) |
| 15 May 1961 | Simcoe, CA | daily high min (Tie) | 14.4 C (57.9 F) | tie | 4 years | 2 of 100 (Routine) |
| 13 May 1961 | Simcoe, CA | daily high min | 13.9 C (57.0 F) | 1.1 C (2.0 F) | 14 years | 15 of 100 (Routine) |
| 6 May 1961 | Simcoe, CA | daily rain | 36.1 mm (1.4 in) | 14.0 mm (0.6 in) | 93 years | 52 of 100 (Notable) |
| 5 May 1961 | Simcoe, CA | daily low min | -2.2 C (28.0 F) | 1.1 C (2.0 F) | 4 years | 12 of 100 (Routine) |
| 2 May 1961 | Simcoe, CA | monthly low max (Tie) | 4.4 C (39.9 F) | tie | 13 years | 5 of 100 (Routine) |
Climate Trend
52 complete years, 1867 to 1960| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1867 | 7.6 C | -0.32 C |
| 1870 | 8.9 C | +0.97 C |
| 1871 | 8.0 C | +0.11 C |
| 1872 | 7.6 C | -0.26 C |
| 1873 | 7.9 C | -0.04 C |
| 1877 | 8.3 C | +0.42 C |
| 1878 | 8.5 C | +0.56 C |
| 1879 | 7.2 C | -0.67 C |
| 1880 | 8.2 C | +0.29 C |
| 1881 | 8.0 C | +0.14 C |
| 1882 | 7.7 C | -0.19 C |
| 1883 | 6.4 C | -1.50 C |
| 1884 | 7.1 C | -0.81 C |
| 1885 | 5.6 C | -2.33 C |
| 1886 | 6.8 C | -1.14 C |
| 1887 | 7.2 C | -0.75 C |
| 1921 | 9.7 C | +1.81 C |
| 1922 | 8.8 C | +0.86 C |
| 1923 | 7.8 C | -0.11 C |
| 1924 | 6.9 C | -0.99 C |
| 1925 | 7.7 C | -0.23 C |
| 1926 | 6.9 C | -0.96 C |
| 1927 | 8.3 C | +0.40 C |
| 1928 | 8.3 C | +0.42 C |
| 1929 | 8.0 C | +0.05 C |
| 1930 | 8.6 C | +0.71 C |
| 1931 | 9.8 C | +1.88 C |
| 1932 | 8.9 C | +0.97 C |
| 1933 | 9.2 C | +1.30 C |
| 1934 | 8.1 C | +0.21 C |
| 1935 | 7.9 C | +0.02 C |
| 1936 | 8.0 C | +0.05 C |
| 1937 | 8.4 C | +0.50 C |
| 1938 | 8.9 C | +1.01 C |
| 1939 | 8.4 C | +0.51 C |
| 1940 | 7.0 C | -0.93 C |
| 1941 | 8.9 C | +0.97 C |
| 1945 | 6.9 C | -0.99 C |
| 1946 | 8.2 C | +0.34 C |
| 1947 | 7.6 C | -0.28 C |
| 1948 | 7.4 C | -0.47 C |
| 1949 | 8.6 C | +0.74 C |
| 1950 | 7.2 C | -0.66 C |
| 1951 | 7.6 C | -0.29 C |
| 1953 | 8.7 C | +0.75 C |
| 1954 | 7.9 C | -0.03 C |
| 1955 | 8.6 C | +0.66 C |
| 1956 | 7.4 C | -0.53 C |
| 1957 | 7.8 C | -0.15 C |
| 1958 | 6.9 C | -0.98 C |
| 1959 | 7.8 C | -0.09 C |
| 1960 | 7.0 C | -0.93 C |
The fitted trend in annual mean temperature here over 1867 to 1960 is 0.04 C (-0.04 to 0.11) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 52 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 (-0.04 to 0.11) per decade | 0.1 F (-0.1 to 0.2) per decade | 1867 to 1960 | 52 | Not clearly different from zero |
| Mean daily maximum | 0.00 C (-0.09 to 0.09) per decade | 0.00 F (-0.16 to 0.17) per decade | 1867 to 1960 | 52 | Not clearly different from zero |
| Mean daily minimum | 0.07 C (0.00 to 0.15) per decade | 0.13 F (-0.01 to 0.28) per decade | 1867 to 1960 | 52 | 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
1866 to 1961| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.0 C (104.0 F) | 1936 | 33.3 C (91.9 F) | 62 |
| Coldest night (TNn) | -37.8 C (-36.0 F) | 1884 | -24.7 C (-12.5 F) | 62 |
| Wettest day (Rx1day) | 115.3 mm (4.5 in) | 1868 | 45.1 mm (1.8 in) | 62 |
| Wettest five days (Rx5day) | 154.2 mm (6.1 in) | 1955 | 69.2 mm (2.7 in) | 62 |
| Longest dry spell (CDD) | 36 days | 1924 | 17 days | 62 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1866 | 35.0 C (95.0 F) |
| 1867 | 34.4 C (93.9 F) |
| 1868 | 37.2 C (99.0 F) |
| 1869 | 30.6 C (87.1 F) |
| 1870 | 35.0 C (95.0 F) |
| 1871 | 32.2 C (90.0 F) |
| 1872 | 36.1 C (97.0 F) |
| 1873 | 33.3 C (91.9 F) |
| 1874 | 16.1 C (61.0 F) |
| 1877 | 31.7 C (89.1 F) |
| 1878 | 33.9 C (93.0 F) |
| 1879 | 31.7 C (89.1 F) |
| 1880 | 31.7 C (89.1 F) |
| 1881 | 34.4 C (93.9 F) |
| 1882 | 30.6 C (87.1 F) |
| 1883 | 31.1 C (88.0 F) |
| 1884 | 31.7 C (89.1 F) |
| 1885 | 30.6 C (87.1 F) |
| 1886 | 30.6 C (87.1 F) |
| 1887 | 32.2 C (90.0 F) |
| 1888 | 6.7 C (44.1 F) |
| 1920 | 31.1 C (88.0 F) |
| 1921 | 35.6 C (96.1 F) |
| 1922 | 33.3 C (91.9 F) |
| 1923 | 35.6 C (96.1 F) |
| 1924 | 32.8 C (91.0 F) |
| 1925 | 36.1 C (97.0 F) |
| 1926 | 35.6 C (96.1 F) |
| 1927 | 34.4 C (93.9 F) |
| 1928 | 33.3 C (91.9 F) |
| 1929 | 35.6 C (96.1 F) |
| 1930 | 34.4 C (93.9 F) |
| 1931 | 37.2 C (99.0 F) |
| 1932 | 36.1 C (97.0 F) |
| 1933 | 37.8 C (100.0 F) |
| 1934 | 35.6 C (96.1 F) |
| 1935 | 35.0 C (95.0 F) |
| 1936 | 40.0 C (104.0 F) |
| 1937 | 33.3 C (91.9 F) |
| 1938 | 32.8 C (91.0 F) |
| 1939 | 35.6 C (96.1 F) |
| 1940 | 32.8 C (91.0 F) |
| 1941 | 34.4 C (93.9 F) |
| 1942 | 33.3 C (91.9 F) |
| 1944 | 21.1 C (70.0 F) |
| 1945 | 33.3 C (91.9 F) |
| 1946 | 33.3 C (91.9 F) |
| 1947 | 34.4 C (93.9 F) |
| 1948 | 36.1 C (97.0 F) |
| 1949 | 36.7 C (98.1 F) |
| 1950 | 31.7 C (89.1 F) |
| 1951 | 31.7 C (89.1 F) |
| 1952 | 34.4 C (93.9 F) |
| 1953 | 35.0 C (95.0 F) |
| 1954 | 32.2 C (90.0 F) |
| 1955 | 35.6 C (96.1 F) |
| 1956 | 33.3 C (91.9 F) |
| 1957 | 31.7 C (89.1 F) |
| 1958 | 32.2 C (90.0 F) |
| 1959 | 32.2 C (90.0 F) |
| 1960 | 31.7 C (89.1 F) |
| 1961 | 31.7 C (89.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1866 | -20.0 C (-4.0 F) |
| 1867 | -25.6 C (-14.1 F) |
| 1868 | -28.9 C (-20.0 F) |
| 1869 | -16.1 C (3.0 F) |
| 1870 | -20.6 C (-5.1 F) |
| 1871 | -25.0 C (-13.0 F) |
| 1872 | -31.1 C (-24.0 F) |
| 1873 | -32.2 C (-26.0 F) |
| 1874 | -20.6 C (-5.1 F) |
| 1877 | -22.2 C (-8.0 F) |
| 1878 | -25.6 C (-14.1 F) |
| 1879 | -24.4 C (-11.9 F) |
| 1880 | -23.3 C (-9.9 F) |
| 1881 | -32.8 C (-27.0 F) |
| 1882 | -25.0 C (-13.0 F) |
| 1883 | -22.8 C (-9.0 F) |
| 1884 | -37.8 C (-36.0 F) |
| 1885 | -30.0 C (-22.0 F) |
| 1886 | -27.2 C (-17.0 F) |
| 1887 | -27.2 C (-17.0 F) |
| 1888 | -28.9 C (-20.0 F) |
| 1920 | -12.2 C (10.0 F) |
| 1921 | -18.9 C (-2.0 F) |
| 1922 | -19.4 C (-2.9 F) |
| 1923 | -20.0 C (-4.0 F) |
| 1924 | -25.6 C (-14.1 F) |
| 1925 | -28.3 C (-18.9 F) |
| 1926 | -21.7 C (-7.1 F) |
| 1927 | -23.9 C (-11.0 F) |
| 1928 | -25.0 C (-13.0 F) |
| 1929 | -27.2 C (-17.0 F) |
| 1930 | -21.7 C (-7.1 F) |
| 1931 | -20.6 C (-5.1 F) |
| 1932 | -18.9 C (-2.0 F) |
| 1933 | -26.1 C (-15.0 F) |
| 1934 | -32.2 C (-26.0 F) |
| 1935 | -25.6 C (-14.1 F) |
| 1936 | -25.0 C (-13.0 F) |
| 1937 | -22.8 C (-9.0 F) |
| 1938 | -20.6 C (-5.1 F) |
| 1939 | -22.2 C (-8.0 F) |
| 1940 | -25.0 C (-13.0 F) |
| 1941 | -21.1 C (-6.0 F) |
| 1942 | -26.7 C (-16.1 F) |
| 1944 | -25.0 C (-13.0 F) |
| 1945 | -31.7 C (-25.1 F) |
| 1946 | -22.2 C (-8.0 F) |
| 1947 | -17.2 C (1.0 F) |
| 1948 | -28.3 C (-18.9 F) |
| 1949 | -19.4 C (-2.9 F) |
| 1950 | -25.6 C (-14.1 F) |
| 1951 | -24.4 C (-11.9 F) |
| 1952 | -17.8 C (0.0 F) |
| 1953 | -20.0 C (-4.0 F) |
| 1954 | -21.7 C (-7.1 F) |
| 1955 | -28.9 C (-20.0 F) |
| 1956 | -20.0 C (-4.0 F) |
| 1957 | -28.3 C (-18.9 F) |
| 1958 | -23.9 C (-11.0 F) |
| 1959 | -24.4 C (-11.9 F) |
| 1960 | -28.9 C (-20.0 F) |
| 1961 | -27.2 C (-17.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1866 | 47.5 mm (1.9 in) |
| 1867 | 86.1 mm (3.4 in) |
| 1868 | 115.3 mm (4.5 in) |
| 1869 | 57.2 mm (2.3 in) |
| 1870 | 67.3 mm (2.6 in) |
| 1871 | 52.1 mm (2.1 in) |
| 1872 | 58.7 mm (2.3 in) |
| 1873 | 41.9 mm (1.6 in) |
| 1874 | 25.4 mm (1.0 in) |
| 1877 | 54.9 mm (2.2 in) |
| 1878 | 100.6 mm (4.0 in) |
| 1879 | 41.4 mm (1.6 in) |
| 1880 | 34.3 mm (1.4 in) |
| 1881 | 61.7 mm (2.4 in) |
| 1882 | 37.6 mm (1.5 in) |
| 1883 | 44.2 mm (1.7 in) |
| 1884 | 22.6 mm (0.9 in) |
| 1885 | 69.9 mm (2.8 in) |
| 1886 | 45.7 mm (1.8 in) |
| 1887 | 27.9 mm (1.1 in) |
| 1888 | 25.4 mm (1.0 in) |
| 1920 | 40.1 mm (1.6 in) |
| 1921 | 53.3 mm (2.1 in) |
| 1922 | 70.6 mm (2.8 in) |
| 1923 | 47.0 mm (1.9 in) |
| 1924 | 36.3 mm (1.4 in) |
| 1925 | 36.3 mm (1.4 in) |
| 1926 | 46.5 mm (1.8 in) |
| 1927 | 41.9 mm (1.6 in) |
| 1928 | 43.7 mm (1.7 in) |
| 1929 | 31.0 mm (1.2 in) |
| 1930 | 35.6 mm (1.4 in) |
| 1931 | 74.9 mm (2.9 in) |
| 1932 | 38.1 mm (1.5 in) |
| 1933 | 34.8 mm (1.4 in) |
| 1934 | 41.9 mm (1.6 in) |
| 1935 | 24.4 mm (1.0 in) |
| 1936 | 23.9 mm (0.9 in) |
| 1937 | 69.6 mm (2.7 in) |
| 1938 | 39.6 mm (1.6 in) |
| 1939 | 51.1 mm (2.0 in) |
| 1940 | 50.8 mm (2.0 in) |
| 1941 | 33.0 mm (1.3 in) |
| 1942 | 78.7 mm (3.1 in) |
| 1944 | 38.1 mm (1.5 in) |
| 1945 | 102.9 mm (4.1 in) |
| 1946 | 35.6 mm (1.4 in) |
| 1947 | 37.3 mm (1.5 in) |
| 1948 | 44.5 mm (1.8 in) |
| 1949 | 51.8 mm (2.0 in) |
| 1950 | 46.0 mm (1.8 in) |
| 1951 | 40.6 mm (1.6 in) |
| 1952 | 69.1 mm (2.7 in) |
| 1953 | 58.4 mm (2.3 in) |
| 1954 | 75.4 mm (3.0 in) |
| 1955 | 73.7 mm (2.9 in) |
| 1956 | 47.2 mm (1.9 in) |
| 1957 | 53.3 mm (2.1 in) |
| 1958 | 29.2 mm (1.1 in) |
| 1959 | 81.8 mm (3.2 in) |
| 1960 | 34.5 mm (1.4 in) |
| 1961 | 36.1 mm (1.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1866 | 55.2 mm (2.2 in) |
| 1867 | 110.2 mm (4.3 in) |
| 1868 | 115.3 mm (4.5 in) |
| 1869 | 86.8 mm (3.4 in) |
| 1870 | 86.9 mm (3.4 in) |
| 1871 | 93.2 mm (3.7 in) |
| 1872 | 98.6 mm (3.9 in) |
| 1873 | 57.1 mm (2.2 in) |
| 1874 | 42.9 mm (1.7 in) |
| 1877 | 68.3 mm (2.7 in) |
| 1878 | 132.4 mm (5.2 in) |
| 1879 | 95.4 mm (3.8 in) |
| 1880 | 61.5 mm (2.4 in) |
| 1881 | 62.7 mm (2.5 in) |
| 1882 | 53.9 mm (2.1 in) |
| 1883 | 66.8 mm (2.6 in) |
| 1884 | 42.9 mm (1.7 in) |
| 1885 | 70.9 mm (2.8 in) |
| 1886 | 80.7 mm (3.2 in) |
| 1887 | 73.4 mm (2.9 in) |
| 1888 | 27.9 mm (1.1 in) |
| 1920 | 59.4 mm (2.3 in) |
| 1921 | 71.9 mm (2.8 in) |
| 1922 | 70.6 mm (2.8 in) |
| 1923 | 50.1 mm (2.0 in) |
| 1924 | 74.2 mm (2.9 in) |
| 1925 | 54.6 mm (2.1 in) |
| 1926 | 69.1 mm (2.7 in) |
| 1927 | 87.1 mm (3.4 in) |
| 1928 | 85.9 mm (3.4 in) |
| 1929 | 79.3 mm (3.1 in) |
| 1930 | 48.8 mm (1.9 in) |
| 1931 | 76.2 mm (3.0 in) |
| 1932 | 51.4 mm (2.0 in) |
| 1933 | 43.1 mm (1.7 in) |
| 1934 | 41.9 mm (1.6 in) |
| 1935 | 45.7 mm (1.8 in) |
| 1936 | 42.7 mm (1.7 in) |
| 1937 | 146.5 mm (5.8 in) |
| 1938 | 63.6 mm (2.5 in) |
| 1939 | 72.7 mm (2.9 in) |
| 1940 | 86.6 mm (3.4 in) |
| 1941 | 60.5 mm (2.4 in) |
| 1942 | 97.2 mm (3.8 in) |
| 1944 | 44.2 mm (1.7 in) |
| 1945 | 119.7 mm (4.7 in) |
| 1946 | 40.3 mm (1.6 in) |
| 1947 | 43.9 mm (1.7 in) |
| 1948 | 50.1 mm (2.0 in) |
| 1949 | 57.2 mm (2.3 in) |
| 1950 | 89.4 mm (3.5 in) |
| 1951 | 65.0 mm (2.6 in) |
| 1952 | 81.0 mm (3.2 in) |
| 1953 | 67.8 mm (2.7 in) |
| 1954 | 110.9 mm (4.4 in) |
| 1955 | 154.2 mm (6.1 in) |
| 1956 | 69.3 mm (2.7 in) |
| 1957 | 90.2 mm (3.6 in) |
| 1958 | 75.0 mm (3.0 in) |
| 1959 | 99.3 mm (3.9 in) |
| 1960 | 66.5 mm (2.6 in) |
| 1961 | 57.2 mm (2.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1866 | 13 days |
| 1867 | 19 days |
| 1868 | 29 days |
| 1869 | 12 days |
| 1870 | 20 days |
| 1871 | 25 days |
| 1872 | 18 days |
| 1873 | 20 days |
| 1874 | 27 days |
| 1877 | 26 days |
| 1878 | 13 days |
| 1879 | 17 days |
| 1880 | 15 days |
| 1881 | 19 days |
| 1882 | 21 days |
| 1883 | 14 days |
| 1884 | 22 days |
| 1885 | 19 days |
| 1886 | 16 days |
| 1887 | 17 days |
| 1888 | 20 days |
| 1920 | 10 days |
| 1921 | 13 days |
| 1922 | 17 days |
| 1923 | 19 days |
| 1924 | 36 days |
| 1925 | 11 days |
| 1926 | 12 days |
| 1927 | 13 days |
| 1928 | 11 days |
| 1929 | 14 days |
| 1930 | 16 days |
| 1931 | 14 days |
| 1932 | 14 days |
| 1933 | 20 days |
| 1934 | 19 days |
| 1935 | 17 days |
| 1936 | 23 days |
| 1937 | 12 days |
| 1938 | 15 days |
| 1939 | 16 days |
| 1940 | 13 days |
| 1941 | 20 days |
| 1942 | 13 days |
| 1944 | 10 days |
| 1945 | 15 days |
| 1946 | 21 days |
| 1947 | 20 days |
| 1948 | 20 days |
| 1949 | 19 days |
| 1950 | 24 days |
| 1951 | 15 days |
| 1952 | 19 days |
| 1953 | 13 days |
| 1954 | 15 days |
| 1955 | 22 days |
| 1956 | 19 days |
| 1957 | 23 days |
| 1958 | 14 days |
| 1959 | 19 days |
| 1960 | 18 days |
| 1961 | 13 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
52 years with a frostAcross 52 years with a frost, the median last spring frost at Simcoe falls on 16 May and the median first autumn frost on 26 September, which leaves a median of 134 days between them.
Fitted over all years, the growing season changes by -1.5 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1927 to 1960) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 16 May | n/a | 17 May | n/a | +0.6 days per decade |
| First autumn frost | 26 September | n/a | 25 September | n/a | -0.9 days per decade |
| Growing days | 134 days | n/a | 130 days | n/a | -1.5 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
56 years, 1867 to 1960A day with at least 47.4 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 125.5 mm (4.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 47.4 mm (1.9 in) | |
| 5 years | 65.5 mm (2.6 in) | |
| 10 years | 78.5 mm (3.1 in) | |
| 25 years | 96.3 mm (3.8 in) | |
| 50 years | 110.5 mm (4.4 in) | |
| 100 years | 125.5 mm (4.9 in) | Longer than the 56 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, 56 years of values from 1867 to 1960.
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: 115.3 mm (4.5 in) in 1868; 102.9 mm (4.1 in) in 1945; 100.6 mm (4.0 in) in 1878.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Simcoe, at 1922 and 1945. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1922 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 1945 ran 0.5 C (1.0 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1922 | +0.3 | +0.6 | likely | 5 |
| 1945 | -0.5 | -1.0 | 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 (2026-10-17).