Kemptville Weather Records (CA006104025)
Record envelope, standing records and threshold days for Kemptville (CA006104025), Ontario, Canada, with 70 years of record.
Key Facts for Kemptville
- Kemptville (CA006104025) is a weather station in Ontario, Canada at 45.00 latitude and -75.63 longitude, 99 m (325 ft) above sea level.
- The station reports from 1928 to 1997, 70 years of record.
- 1,464 records set at Kemptville still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Kemptville set a daily record high minimum temperature of -0.5 C (31.1 F) on 14 December 1983.
About the Station
- Location: Ontario, Canada, 45.00 latitude, -75.63 longitude.
- Elevation: 99 m (325 ft).
- Period of record: 1928 to 1997, 70 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 | 13.9 C (57.0 F) | -38.3 C (-36.9 F) | n/a | n/a |
| Feb | 14.5 C (58.1 F) | -39.4 C (-38.9 F) | n/a | n/a |
| Mar | 26.7 C (80.1 F) | -32.0 C (-25.6 F) | n/a | n/a |
| Apr | 29.4 C (84.9 F) | -15.6 C (3.9 F) | n/a | n/a |
| May | 33.9 C (93.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Jun | 38.3 C (100.9 F) | -0.6 C (30.9 F) | n/a | n/a |
| Jul | 36.7 C (98.1 F) | 3.0 C (37.4 F) | n/a | n/a |
| Aug | 38.3 C (100.9 F) | -0.6 C (30.9 F) | n/a | n/a |
| Sep | 36.1 C (97.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Oct | 28.3 C (82.9 F) | -12.2 C (10.0 F) | n/a | n/a |
| Nov | 23.3 C (73.9 F) | -23.9 C (-11.0 F) | n/a | n/a |
| Dec | 16.7 C (62.1 F) | -35.6 C (-32.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1928 | 4 |
| 1929 | 22 |
| 1930 | 20 |
| 1931 | 32 |
| 1932 | 31 |
| 1933 | 48 |
| 1934 | 40 |
| 1935 | 30 |
| 1936 | 26 |
| 1937 | 3 |
| 1939 | 18 |
| 1940 | 29 |
| 1941 | 23 |
| 1942 | 27 |
| 1943 | 26 |
| 1944 | 27 |
| 1945 | 42 |
| 1946 | 45 |
| 1947 | 31 |
| 1948 | 26 |
| 1949 | 42 |
| 1950 | 26 |
| 1951 | 23 |
| 1952 | 12 |
| 1953 | 34 |
| 1954 | 25 |
| 1955 | 21 |
| 1956 | 21 |
| 1957 | 33 |
| 1958 | 21 |
| 1959 | 28 |
| 1960 | 9 |
| 1961 | 14 |
| 1962 | 28 |
| 1963 | 18 |
| 1964 | 36 |
| 1965 | 37 |
| 1966 | 18 |
| 1967 | 20 |
| 1968 | 31 |
| 1969 | 16 |
| 1970 | 20 |
| 1971 | 28 |
| 1972 | 17 |
| 1973 | 28 |
| 1974 | 27 |
| 1975 | 21 |
| 1976 | 43 |
| 1977 | 27 |
| 1978 | 34 |
| 1979 | 41 |
| 1980 | 22 |
| 1981 | 41 |
| 1982 | 28 |
| 1983 | 24 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1971-02-03 | Record low minimum temperature | Record low minimum temperature -39.4 C (-38.9 F) |
| 1981-09-08 | Record daily precipitation | Record daily precipitation 74.0 mm (2.9 in) |
Wettest Day of Each Month
Sep: 74.0 mm (2.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 43.5 mm (1.7 in) | 8 January 1978 |
| Feb | 48.8 mm (1.9 in) | 21 February 1976 |
| Mar | 63.5 mm (2.5 in) | 2 March 1947 |
| Apr | 48.3 mm (1.9 in) | 12 April 1934 |
| May | 48.0 mm (1.9 in) | 18 May 1972 |
| Jun | 66.0 mm (2.6 in) | 25 June 1953 |
| Jul | 65.8 mm (2.6 in) | 4 July 1951 |
| Aug | 64.3 mm (2.5 in) | 24 August 1933 |
| Sep | 74.0 mm (2.9 in) | 8 September 1981 |
| Oct | 56.6 mm (2.2 in) | 25 October 1980 |
| Nov | 44.2 mm (1.7 in) | 19 November 1948 |
| Dec | 41.0 mm (1.6 in) | 28 December 1977 |
Period of Record Coverage
1928 to 1983| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1928 | 48 | 13% | No |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 364 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 59 | 16% | No |
| 1939 | 245 | 67% | No |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 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 | 364 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 364 | 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 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 362 | 99% | Yes |
| 1982 | 360 | 99% | Yes |
| 1983 | 364 | 100% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 14 December 1983 | Kemptville, CA | daily high min | -0.5 C (31.1 F) | 0.6 C (1.1 F) | 52 years | 20 of 100 (Routine) |
| 13 December 1983 | Kemptville, CA | daily rain | 20.8 mm (0.8 in) | 5.1 mm (0.20 in) | 41 years | 20 of 100 (Routine) |
| 12 December 1983 | Kemptville, CA | daily rain | 34.7 mm (1.4 in) | 6.5 mm (0.26 in) | 10 years | 18 of 100 (Routine) |
| 6 December 1983 | Kemptville, CA | daily rain | 18.7 mm (0.7 in) | 2.4 mm (0.09 in) | 37 years | 19 of 100 (Routine) |
| 16 November 1983 | Kemptville, CA | daily snowfall | 7.3 cm (2.9 in) | 4.8 cm (1.9 in) | 42 years | 29 of 100 (Routine) |
| 15 November 1983 | Kemptville, CA | daily snowfall | 12.4 cm (4.9 in) | 7.3 cm (2.9 in) | 12 years | 27 of 100 (Routine) |
| 15 November 1983 | Kemptville, CA | daily rain | 23.4 mm (0.9 in) | 10.4 mm (0.4 in) | 17 years | 20 of 100 (Routine) |
| 14 November 1983 | Kemptville, CA | daily low min | -14.0 C (6.8 F) | 1.2 C (2.2 F) | 44 years | 20 of 100 (Routine) |
| 13 November 1983 | Kemptville, CA | daily low min | -12.0 C (10.4 F) | 2.0 C (3.6 F) | 6 years | 10 of 100 (Routine) |
| 11 November 1983 | Kemptville, CA | daily snowfall | 14.0 cm (5.5 in) | 13.2 cm (5.2 in) | 41 years | 51 of 100 (Notable) |
| 11 November 1983 | Kemptville, CA | daily rain | 22.2 mm (0.9 in) | 7.0 mm (0.28 in) | 36 years | 20 of 100 (Routine) |
| 4 November 1983 | Kemptville, CA | monthly snowfall | 29.8 cm (11.7 in) | 6.9 cm (2.7 in) | 35 years | 43 of 100 (Notable) |
| 4 November 1983 | Kemptville, CA | daily rain | 37.0 mm (1.5 in) | 2.2 mm (0.09 in) | 32 years | 17 of 100 (Routine) |
| 13 October 1983 | Kemptville, CA | daily high max | 27.0 C (80.6 F) | 0.9 C (1.6 F) | 52 years | 21 of 100 (Routine) |
| 5 October 1983 | Kemptville, CA | daily rain | 41.0 mm (1.6 in) | 16.6 mm (0.7 in) | 20 years | 31 of 100 (Routine) |
| 15 September 1983 | Kemptville, CA | daily low min | -0.5 C (31.1 F) | 1.1 C (2.0 F) | 26 years | 15 of 100 (Routine) |
| 14 September 1983 | Kemptville, CA | daily low min | -2.0 C (28.4 F) | 0.9 C (1.6 F) | 20 years | 12 of 100 (Routine) |
| 11 September 1983 | Kemptville, CA | daily high min | 21.0 C (69.8 F) | 0.4 C (0.7 F) | 21 years | 11 of 100 (Routine) |
| 6 September 1983 | Kemptville, CA | daily high min | 20.5 C (68.9 F) | 0.5 C (0.9 F) | 13 years | 9 of 100 (Routine) |
| 10 August 1983 | Kemptville, CA | daily low min | 4.0 C (39.2 F) | 3.2 C (5.8 F) | 8 years | 14 of 100 (Routine) |
Climate Trend
52 complete years, 1929 to 1983| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1929 | 5.6 C | -0.37 C |
| 1930 | 6.4 C | +0.43 C |
| 1931 | 7.4 C | +1.48 C |
| 1932 | 6.4 C | +0.43 C |
| 1933 | 6.0 C | +0.10 C |
| 1934 | 4.9 C | -1.05 C |
| 1935 | 5.2 C | -0.73 C |
| 1936 | 5.5 C | -0.49 C |
| 1940 | 4.8 C | -1.10 C |
| 1941 | 6.0 C | +0.10 C |
| 1942 | 6.2 C | +0.25 C |
| 1943 | 4.9 C | -1.00 C |
| 1944 | 6.2 C | +0.27 C |
| 1945 | 5.6 C | -0.31 C |
| 1946 | 6.3 C | +0.33 C |
| 1947 | 5.8 C | -0.13 C |
| 1948 | 6.8 C | +0.83 C |
| 1949 | 7.5 C | +1.56 C |
| 1950 | 5.9 C | -0.01 C |
| 1951 | 6.4 C | +0.48 C |
| 1952 | 7.2 C | +1.30 C |
| 1953 | 8.1 C | +2.16 C |
| 1954 | 6.2 C | +0.22 C |
| 1955 | 6.7 C | +0.76 C |
| 1956 | 5.5 C | -0.46 C |
| 1957 | 6.4 C | +0.49 C |
| 1958 | 5.0 C | -0.91 C |
| 1959 | 6.5 C | +0.53 C |
| 1960 | 6.4 C | +0.47 C |
| 1961 | 6.1 C | +0.15 C |
| 1962 | 5.2 C | -0.73 C |
| 1963 | 5.5 C | -0.45 C |
| 1964 | 6.5 C | +0.58 C |
| 1965 | 5.2 C | -0.70 C |
| 1966 | 6.1 C | +0.15 C |
| 1967 | 6.1 C | +0.14 C |
| 1968 | 5.8 C | -0.19 C |
| 1969 | 6.3 C | +0.32 C |
| 1970 | 5.5 C | -0.44 C |
| 1971 | 5.5 C | -0.44 C |
| 1972 | 5.0 C | -0.97 C |
| 1973 | 6.9 C | +0.93 C |
| 1974 | 5.5 C | -0.43 C |
| 1975 | 6.0 C | +0.02 C |
| 1976 | 4.1 C | -1.81 C |
| 1977 | 5.8 C | -0.18 C |
| 1978 | 4.6 C | -1.36 C |
| 1979 | 6.1 C | +0.15 C |
| 1980 | 5.2 C | -0.76 C |
| 1981 | 6.4 C | +0.46 C |
| 1982 | 5.4 C | -0.55 C |
| 1983 | 6.4 C | +0.41 C |
The fitted trend in annual mean temperature here over 1929 to 1983 is -0.1 C (-0.2 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.4 to 0.1) 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 | -0.1 C (-0.2 to 0.1) per decade | -0.2 F (-0.4 to 0.1) per decade | 1929 to 1983 | 52 | Not clearly different from zero |
| Mean daily maximum | -0.16 C (-0.30 to -0.03) per decade | -0.3 F (-0.5 to -0.1) per decade | 1929 to 1983 | 52 | Fall |
| Mean daily minimum | 0.00 C (-0.16 to 0.16) per decade | -0.01 F (-0.29 to 0.28) per decade | 1929 to 1983 | 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
1928 to 1983| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.3 C (100.9 F) | 1941 | 33.3 C (91.9 F) | 55 |
| Coldest night (TNn) | -39.4 C (-38.9 F) | 1971 | -31.1 C (-24.0 F) | 55 |
| Wettest day (Rx1day) | 74.0 mm (2.9 in) | 1981 | 45.7 mm (1.8 in) | 55 |
| Wettest five days (Rx5day) | 143.7 mm (5.7 in) | 1981 | 64.1 mm (2.5 in) | 55 |
| Longest dry spell (CDD) | 39 days | 1961 | 16 days | 55 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1928 | 18.3 C (64.9 F) |
| 1929 | 35.6 C (96.1 F) |
| 1930 | 31.7 C (89.1 F) |
| 1931 | 36.7 C (98.1 F) |
| 1932 | 32.8 C (91.0 F) |
| 1933 | 35.6 C (96.1 F) |
| 1934 | 34.4 C (93.9 F) |
| 1935 | 34.4 C (93.9 F) |
| 1936 | 34.4 C (93.9 F) |
| 1937 | 10.6 C (51.1 F) |
| 1939 | 35.6 C (96.1 F) |
| 1940 | 33.3 C (91.9 F) |
| 1941 | 38.3 C (100.9 F) |
| 1942 | 36.1 C (97.0 F) |
| 1943 | 33.9 C (93.0 F) |
| 1944 | 38.3 C (100.9 F) |
| 1945 | 33.3 C (91.9 F) |
| 1946 | 35.0 C (95.0 F) |
| 1947 | 34.4 C (93.9 F) |
| 1948 | 36.7 C (98.1 F) |
| 1949 | 37.2 C (99.0 F) |
| 1950 | 32.2 C (90.0 F) |
| 1951 | 31.1 C (88.0 F) |
| 1952 | 35.0 C (95.0 F) |
| 1953 | 35.0 C (95.0 F) |
| 1954 | 31.7 C (89.1 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 33.9 C (93.0 F) |
| 1957 | 34.4 C (93.9 F) |
| 1958 | 32.8 C (91.0 F) |
| 1959 | 34.4 C (93.9 F) |
| 1960 | 33.3 C (91.9 F) |
| 1961 | 32.2 C (90.0 F) |
| 1962 | 33.9 C (93.0 F) |
| 1963 | 36.1 C (97.0 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 32.8 C (91.0 F) |
| 1966 | 35.6 C (96.1 F) |
| 1967 | 31.1 C (88.0 F) |
| 1968 | 33.3 C (91.9 F) |
| 1969 | 33.3 C (91.9 F) |
| 1970 | 31.1 C (88.0 F) |
| 1971 | 32.2 C (90.0 F) |
| 1972 | 31.7 C (89.1 F) |
| 1973 | 33.3 C (91.9 F) |
| 1974 | 31.7 C (89.1 F) |
| 1975 | 36.1 C (97.0 F) |
| 1976 | 31.7 C (89.1 F) |
| 1977 | 32.5 C (90.5 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 33.0 C (91.4 F) |
| 1980 | 31.5 C (88.7 F) |
| 1981 | 33.0 C (91.4 F) |
| 1982 | 31.5 C (88.7 F) |
| 1983 | 32.5 C (90.5 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1928 | -21.1 C (-6.0 F) |
| 1929 | -27.8 C (-18.0 F) |
| 1930 | -29.4 C (-20.9 F) |
| 1931 | -30.0 C (-22.0 F) |
| 1932 | -28.3 C (-18.9 F) |
| 1933 | -35.6 C (-32.1 F) |
| 1934 | -35.6 C (-32.1 F) |
| 1935 | -33.9 C (-29.0 F) |
| 1936 | -28.3 C (-18.9 F) |
| 1937 | -20.6 C (-5.1 F) |
| 1939 | -22.2 C (-8.0 F) |
| 1940 | -27.8 C (-18.0 F) |
| 1941 | -28.3 C (-18.9 F) |
| 1942 | -33.9 C (-29.0 F) |
| 1943 | -35.0 C (-31.0 F) |
| 1944 | -30.0 C (-22.0 F) |
| 1945 | -32.2 C (-26.0 F) |
| 1946 | -30.0 C (-22.0 F) |
| 1947 | -31.7 C (-25.1 F) |
| 1948 | -33.9 C (-29.0 F) |
| 1949 | -28.9 C (-20.0 F) |
| 1950 | -30.0 C (-22.0 F) |
| 1951 | -35.6 C (-32.1 F) |
| 1952 | -28.3 C (-18.9 F) |
| 1953 | -25.0 C (-13.0 F) |
| 1954 | -29.4 C (-20.9 F) |
| 1955 | -30.0 C (-22.0 F) |
| 1956 | -26.7 C (-16.1 F) |
| 1957 | -37.8 C (-36.0 F) |
| 1958 | -29.4 C (-20.9 F) |
| 1959 | -33.9 C (-29.0 F) |
| 1960 | -27.8 C (-18.0 F) |
| 1961 | -28.3 C (-18.9 F) |
| 1962 | -35.0 C (-31.0 F) |
| 1963 | -31.7 C (-25.1 F) |
| 1964 | -30.6 C (-23.1 F) |
| 1965 | -31.1 C (-24.0 F) |
| 1966 | -30.0 C (-22.0 F) |
| 1967 | -32.8 C (-27.0 F) |
| 1968 | -32.2 C (-26.0 F) |
| 1969 | -26.7 C (-16.1 F) |
| 1970 | -31.7 C (-25.1 F) |
| 1971 | -39.4 C (-38.9 F) |
| 1972 | -36.1 C (-33.0 F) |
| 1973 | -35.0 C (-31.0 F) |
| 1974 | -34.4 C (-29.9 F) |
| 1975 | -29.4 C (-20.9 F) |
| 1976 | -38.3 C (-36.9 F) |
| 1977 | -35.6 C (-32.1 F) |
| 1978 | -34.0 C (-29.2 F) |
| 1979 | -35.0 C (-31.0 F) |
| 1980 | -33.0 C (-27.4 F) |
| 1981 | -36.5 C (-33.7 F) |
| 1982 | -34.0 C (-29.2 F) |
| 1983 | -28.0 C (-18.4 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1928 | 20.3 mm (0.8 in) |
| 1929 | 30.5 mm (1.2 in) |
| 1930 | 24.1 mm (0.9 in) |
| 1931 | 54.6 mm (2.1 in) |
| 1932 | 49.8 mm (2.0 in) |
| 1933 | 64.3 mm (2.5 in) |
| 1934 | 48.3 mm (1.9 in) |
| 1935 | 48.3 mm (1.9 in) |
| 1936 | 41.9 mm (1.6 in) |
| 1937 | 15.2 mm (0.6 in) |
| 1939 | 33.3 mm (1.3 in) |
| 1940 | 47.2 mm (1.9 in) |
| 1941 | 40.4 mm (1.6 in) |
| 1942 | 49.3 mm (1.9 in) |
| 1943 | 45.7 mm (1.8 in) |
| 1944 | 44.5 mm (1.8 in) |
| 1945 | 72.9 mm (2.9 in) |
| 1946 | 56.1 mm (2.2 in) |
| 1947 | 63.5 mm (2.5 in) |
| 1948 | 44.2 mm (1.7 in) |
| 1949 | 47.2 mm (1.9 in) |
| 1950 | 34.8 mm (1.4 in) |
| 1951 | 65.8 mm (2.6 in) |
| 1952 | 48.5 mm (1.9 in) |
| 1953 | 66.0 mm (2.6 in) |
| 1954 | 36.1 mm (1.4 in) |
| 1955 | 50.8 mm (2.0 in) |
| 1956 | 35.8 mm (1.4 in) |
| 1957 | 33.3 mm (1.3 in) |
| 1958 | 51.6 mm (2.0 in) |
| 1959 | 52.1 mm (2.1 in) |
| 1960 | 25.9 mm (1.0 in) |
| 1961 | 38.1 mm (1.5 in) |
| 1962 | 39.1 mm (1.5 in) |
| 1963 | 61.5 mm (2.4 in) |
| 1964 | 28.7 mm (1.1 in) |
| 1965 | 35.6 mm (1.4 in) |
| 1966 | 40.6 mm (1.6 in) |
| 1967 | 39.4 mm (1.6 in) |
| 1968 | 38.6 mm (1.5 in) |
| 1969 | 54.4 mm (2.1 in) |
| 1970 | 45.5 mm (1.8 in) |
| 1971 | 34.8 mm (1.4 in) |
| 1972 | 48.0 mm (1.9 in) |
| 1973 | 36.3 mm (1.4 in) |
| 1974 | 42.4 mm (1.7 in) |
| 1975 | 58.7 mm (2.3 in) |
| 1976 | 48.8 mm (1.9 in) |
| 1977 | 56.2 mm (2.2 in) |
| 1978 | 43.5 mm (1.7 in) |
| 1979 | 57.2 mm (2.3 in) |
| 1980 | 56.6 mm (2.2 in) |
| 1981 | 74.0 mm (2.9 in) |
| 1982 | 47.0 mm (1.9 in) |
| 1983 | 41.0 mm (1.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1928 | 55.4 mm (2.2 in) |
| 1929 | 55.7 mm (2.2 in) |
| 1930 | 37.9 mm (1.5 in) |
| 1931 | 74.2 mm (2.9 in) |
| 1932 | 66.8 mm (2.6 in) |
| 1933 | 64.3 mm (2.5 in) |
| 1934 | 73.2 mm (2.9 in) |
| 1935 | 72.7 mm (2.9 in) |
| 1936 | 45.4 mm (1.8 in) |
| 1937 | 21.6 mm (0.9 in) |
| 1939 | 42.1 mm (1.7 in) |
| 1940 | 87.3 mm (3.4 in) |
| 1941 | 67.6 mm (2.7 in) |
| 1942 | 64.5 mm (2.5 in) |
| 1943 | 58.2 mm (2.3 in) |
| 1944 | 74.2 mm (2.9 in) |
| 1945 | 120.7 mm (4.8 in) |
| 1946 | 58.9 mm (2.3 in) |
| 1947 | 83.9 mm (3.3 in) |
| 1948 | 55.6 mm (2.2 in) |
| 1949 | 81.7 mm (3.2 in) |
| 1950 | 51.3 mm (2.0 in) |
| 1951 | 69.9 mm (2.8 in) |
| 1952 | 78.2 mm (3.1 in) |
| 1953 | 66.0 mm (2.6 in) |
| 1954 | 74.0 mm (2.9 in) |
| 1955 | 75.4 mm (3.0 in) |
| 1956 | 57.9 mm (2.3 in) |
| 1957 | 51.1 mm (2.0 in) |
| 1958 | 64.1 mm (2.5 in) |
| 1959 | 67.3 mm (2.6 in) |
| 1960 | 58.4 mm (2.3 in) |
| 1961 | 67.6 mm (2.7 in) |
| 1962 | 46.0 mm (1.8 in) |
| 1963 | 63.8 mm (2.5 in) |
| 1964 | 37.8 mm (1.5 in) |
| 1965 | 62.9 mm (2.5 in) |
| 1966 | 54.3 mm (2.1 in) |
| 1967 | 60.6 mm (2.4 in) |
| 1968 | 55.1 mm (2.2 in) |
| 1969 | 58.5 mm (2.3 in) |
| 1970 | 54.9 mm (2.2 in) |
| 1971 | 49.9 mm (2.0 in) |
| 1972 | 68.3 mm (2.7 in) |
| 1973 | 65.8 mm (2.6 in) |
| 1974 | 52.5 mm (2.1 in) |
| 1975 | 84.0 mm (3.3 in) |
| 1976 | 63.3 mm (2.5 in) |
| 1977 | 92.6 mm (3.6 in) |
| 1978 | 57.4 mm (2.3 in) |
| 1979 | 83.3 mm (3.3 in) |
| 1980 | 58.6 mm (2.3 in) |
| 1981 | 143.7 mm (5.7 in) |
| 1982 | 65.0 mm (2.6 in) |
| 1983 | 76.1 mm (3.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1928 | 7 days |
| 1929 | 17 days |
| 1930 | 21 days |
| 1931 | 16 days |
| 1932 | 16 days |
| 1933 | 13 days |
| 1934 | 20 days |
| 1935 | 21 days |
| 1936 | 14 days |
| 1937 | 18 days |
| 1939 | 37 days |
| 1940 | 17 days |
| 1941 | 25 days |
| 1942 | 13 days |
| 1943 | 14 days |
| 1944 | 19 days |
| 1945 | 18 days |
| 1946 | 10 days |
| 1947 | 19 days |
| 1948 | 14 days |
| 1949 | 14 days |
| 1950 | 14 days |
| 1951 | 15 days |
| 1952 | 13 days |
| 1953 | 20 days |
| 1954 | 11 days |
| 1955 | 13 days |
| 1956 | 18 days |
| 1957 | 21 days |
| 1958 | 20 days |
| 1959 | 16 days |
| 1960 | 18 days |
| 1961 | 39 days |
| 1962 | 14 days |
| 1963 | 20 days |
| 1964 | 22 days |
| 1965 | 19 days |
| 1966 | 12 days |
| 1967 | 17 days |
| 1968 | 17 days |
| 1969 | 13 days |
| 1970 | 18 days |
| 1971 | 11 days |
| 1972 | 11 days |
| 1973 | 11 days |
| 1974 | 11 days |
| 1975 | 16 days |
| 1976 | 12 days |
| 1977 | 18 days |
| 1978 | 27 days |
| 1979 | 11 days |
| 1980 | 11 days |
| 1981 | 10 days |
| 1982 | 13 days |
| 1983 | 17 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 Kemptville falls on 17 May and the median first autumn frost on 23 September, which leaves a median of 130 days between them.
Fitted over all years, the growing season changes by -0.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1954 to 1983) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 17 May | n/a | 19 May | n/a | +0.1 days per decade |
| First autumn frost | 23 September | n/a | 23 September | n/a | -0.3 days per decade |
| Growing days | 130 days | n/a | 129 days | n/a | -0.4 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
52 years, 1929 to 1983A day with at least 46.1 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 76.7 mm (3.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 46.1 mm (1.8 in) | |
| 5 years | 56.4 mm (2.2 in) | |
| 10 years | 62.3 mm (2.5 in) | |
| 25 years | 68.8 mm (2.7 in) | |
| 50 years | 73.0 mm (2.9 in) | |
| 100 years | 76.7 mm (3.0 in) | Longer than the 52 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, 52 years of values from 1929 to 1983.
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: 74.0 mm (2.9 in) in 1981; 72.9 mm (2.9 in) in 1945; 66.0 mm (2.6 in) in 1953.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
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).