Petawawa Nat Forestry Weather Records (CA006106400)
Record envelope, standing records and threshold days for Petawawa Nat Forestry (CA006106400), Ontario, Canada, with 69 years of record.
Key Facts for Petawawa Nat Forestry
- Petawawa Nat Forestry (CA006106400) is a weather station in Ontario, Canada at 45.98 latitude and -77.43 longitude, 183 m (600 ft) above sea level.
- The station reports from 1931 to 1999, 69 years of record.
- 1,464 records set at Petawawa Nat Forestry still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Petawawa Nat Forestry set a daily record low maximum temperature of -20.0 C (-4.0 F) on 20 December 1983.
About the Station
- Location: Ontario, Canada, 45.98 latitude, -77.43 longitude.
- Elevation: 183 m (600 ft).
- Period of record: 1931 to 1999, 69 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 | 11.7 C (53.1 F) | -41.0 C (-41.8 F) | n/a | n/a |
| Feb | 12.0 C (53.6 F) | -36.1 C (-33.0 F) | n/a | n/a |
| Mar | 23.3 C (73.9 F) | -33.0 C (-27.4 F) | n/a | n/a |
| Apr | 31.7 C (89.1 F) | -22.2 C (-8.0 F) | n/a | n/a |
| May | 34.0 C (93.2 F) | -9.4 C (15.1 F) | n/a | n/a |
| Jun | 35.6 C (96.1 F) | -2.8 C (27.0 F) | n/a | n/a |
| Jul | 38.9 C (102.0 F) | 2.2 C (36.0 F) | n/a | n/a |
| Aug | 37.2 C (99.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Sep | 35.0 C (95.0 F) | -4.5 C (23.9 F) | n/a | n/a |
| Oct | 28.3 C (82.9 F) | -11.1 C (12.0 F) | n/a | n/a |
| Nov | 21.7 C (71.1 F) | -23.9 C (-11.0 F) | n/a | n/a |
| Dec | 15.6 C (60.1 F) | -36.7 C (-34.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1931 | 37 |
| 1932 | 32 |
| 1933 | 18 |
| 1934 | 12 |
| 1935 | 14 |
| 1936 | 22 |
| 1937 | 16 |
| 1938 | 15 |
| 1939 | 16 |
| 1940 | 21 |
| 1941 | 15 |
| 1943 | 7 |
| 1944 | 18 |
| 1945 | 17 |
| 1946 | 19 |
| 1947 | 17 |
| 1948 | 7 |
| 1949 | 25 |
| 1950 | 14 |
| 1951 | 23 |
| 1952 | 17 |
| 1953 | 46 |
| 1954 | 26 |
| 1955 | 36 |
| 1956 | 33 |
| 1957 | 46 |
| 1958 | 27 |
| 1959 | 34 |
| 1960 | 13 |
| 1961 | 29 |
| 1962 | 32 |
| 1963 | 33 |
| 1964 | 42 |
| 1965 | 37 |
| 1966 | 35 |
| 1967 | 32 |
| 1968 | 45 |
| 1969 | 21 |
| 1970 | 23 |
| 1971 | 34 |
| 1972 | 39 |
| 1973 | 38 |
| 1974 | 19 |
| 1975 | 37 |
| 1976 | 51 |
| 1977 | 51 |
| 1978 | 39 |
| 1979 | 34 |
| 1980 | 39 |
| 1981 | 46 |
| 1982 | 40 |
| 1983 | 25 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1967-01-27 | Record daily snowfall | Record daily snowfall 35.8 cm (14.1 in) |
| 1973-03-17 | Record daily snowfall | Record daily snowfall 40.1 cm (15.8 in) |
| 1981-01-03 | Record low maximum temperature | Record low maximum temperature -30.0 C (-22.0 F) |
| 1981-01-03 | Record low minimum temperature | Record low minimum temperature -41.0 C (-41.8 F) |
Wettest Day of Each Month
Jun: 118.9 mm (4.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 35.8 mm (1.4 in) | 27 January 1967 |
| Feb | 33.0 mm (1.3 in) | 25 February 1965 |
| Mar | 40.1 mm (1.6 in) | 17 March 1973 |
| Apr | 26.7 mm (1.1 in) | 15 April 1955 |
| May | 55.5 mm (2.2 in) | 30 May 1982 |
| Jun | 118.9 mm (4.7 in) | 10 June 1936 |
| Jul | 75.2 mm (3.0 in) | 13 July 1956 |
| Aug | 83.6 mm (3.3 in) | 2 August 1965 |
| Sep | 48.5 mm (1.9 in) | 21 September 1944 |
| Oct | 45.2 mm (1.8 in) | 15 October 1955 |
| Nov | 38.4 mm (1.5 in) | 20 November 1974 |
| Dec | 32.0 mm (1.3 in) | 4 December 1961 |
Period of Record Coverage
1931 to 1983| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1931 | 224 | 61% | No |
| 1932 | 305 | 83% | No |
| 1933 | 191 | 52% | No |
| 1934 | 182 | 50% | No |
| 1935 | 184 | 50% | No |
| 1936 | 179 | 49% | No |
| 1937 | 179 | 49% | No |
| 1938 | 183 | 50% | No |
| 1939 | 177 | 48% | No |
| 1940 | 179 | 49% | No |
| 1941 | 183 | 50% | No |
| 1943 | 180 | 49% | No |
| 1944 | 168 | 46% | No |
| 1945 | 183 | 50% | No |
| 1946 | 183 | 50% | No |
| 1947 | 142 | 39% | No |
| 1948 | 183 | 50% | No |
| 1949 | 175 | 48% | No |
| 1950 | 153 | 42% | No |
| 1951 | 245 | 67% | No |
| 1952 | 333 | 91% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 304 | 83% | No |
| 1956 | 359 | 98% | Yes |
| 1957 | 361 | 99% | Yes |
| 1958 | 301 | 82% | No |
| 1959 | 361 | 99% | Yes |
| 1960 | 358 | 98% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 354 | 97% | Yes |
| 1963 | 363 | 99% | Yes |
| 1964 | 364 | 99% | Yes |
| 1965 | 332 | 91% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 363 | 99% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 361 | 99% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 20 December 1983 | Petawawa Nat Forestry, CA | daily low max | -20.0 C (-4.0 F) | 0.6 C (1.1 F) | 20 years | 11 of 100 (Routine) |
| 20 December 1983 | Petawawa Nat Forestry, CA | daily low min | -35.5 C (-31.9 F) | 1.5 C (2.7 F) | 2 years | 6 of 100 (Routine) |
| 7 December 1983 | Petawawa Nat Forestry, CA | daily low max | -12.5 C (9.5 F) | 2.5 C (4.5 F) | 10 years | 11 of 100 (Routine) |
| 6 December 1983 | Petawawa Nat Forestry, CA | daily snowfall | 18.0 cm (7.1 in) | 8.9 cm (3.5 in) | 12 years | 28 of 100 (Routine) |
| 30 November 1983 | Petawawa Nat Forestry, CA | daily high min (Tie) | -0.5 C (31.1 F) | tie | 0 years | 1 of 100 (Routine) |
| 18 November 1983 | Petawawa Nat Forestry, CA | daily low max | -3.5 C (25.7 F) | 0.7 C (1.3 F) | 24 years | 13 of 100 (Routine) |
| 14 November 1983 | Petawawa Nat Forestry, CA | daily low min | -12.5 C (9.5 F) | 0.3 C (0.5 F) | 12 years | 8 of 100 (Routine) |
| 11 November 1983 | Petawawa Nat Forestry, CA | daily snowfall | 8.8 cm (3.5 in) | 4.3 cm (1.7 in) | 5 years | 14 of 100 (Routine) |
| 4 November 1983 | Petawawa Nat Forestry, CA | daily snowfall | 7.2 cm (2.8 in) | 1.4 cm (0.6 in) | 6 years | 9 of 100 (Routine) |
| 4 November 1983 | Petawawa Nat Forestry, CA | daily low max (Tie) | 0.0 C (32.0 F) | tie | 49 years | 4 of 100 (Routine) |
| 3 November 1983 | Petawawa Nat Forestry, CA | daily snowfall | 20.0 cm (7.9 in) | 14.7 cm (5.8 in) | 32 years | 44 of 100 (Notable) |
| 3 November 1983 | Petawawa Nat Forestry, CA | daily rain | 23.6 mm (0.9 in) | 6.6 mm (0.26 in) | 13 years | 20 of 100 (Routine) |
| 23 October 1983 | Petawawa Nat Forestry, CA | daily snowfall | 4.0 cm (1.6 in) | 2.7 cm (1.1 in) | 49 years | 20 of 100 (Routine) |
| 21 October 1983 | Petawawa Nat Forestry, CA | daily low min | -8.0 C (17.6 F) | 0.2 C (0.4 F) | 24 years | 12 of 100 (Routine) |
| 16 September 1983 | Petawawa Nat Forestry, CA | daily rain | 26.0 mm (1.0 in) | 3.9 mm (0.15 in) | 48 years | 23 of 100 (Routine) |
| 6 September 1983 | Petawawa Nat Forestry, CA | daily high min | 20.5 C (68.9 F) | 0.5 C (0.9 F) | 12 years | 8 of 100 (Routine) |
| 5 September 1983 | Petawawa Nat Forestry, CA | daily high max | 32.0 C (89.6 F) | 2.0 C (3.6 F) | 34 years | 18 of 100 (Routine) |
| 26 August 1983 | Petawawa Nat Forestry, CA | daily rain | 14.1 mm (0.6 in) | 0.6 mm (0.02 in) | 10 years | 8 of 100 (Routine) |
| 18 August 1983 | Petawawa Nat Forestry, CA | daily high min | 18.5 C (65.3 F) | 0.7 C (1.3 F) | 42 years | 18 of 100 (Routine) |
| 10 August 1983 | Petawawa Nat Forestry, CA | daily low min | 4.5 C (40.1 F) | 1.0 C (1.8 F) | 2 years | 7 of 100 (Routine) |
Climate Trend
28 complete years, 1953 to 1983| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1953 | 6.1 C | +1.80 C |
| 1954 | 4.2 C | -0.09 C |
| 1956 | 3.9 C | -0.42 C |
| 1957 | 5.0 C | +0.69 C |
| 1959 | 4.6 C | +0.27 C |
| 1960 | 4.7 C | +0.36 C |
| 1961 | 4.8 C | +0.48 C |
| 1962 | 4.1 C | -0.26 C |
| 1963 | 4.0 C | -0.35 C |
| 1964 | 5.0 C | +0.69 C |
| 1966 | 4.5 C | +0.18 C |
| 1967 | 3.8 C | -0.48 C |
| 1968 | 4.5 C | +0.13 C |
| 1969 | 4.8 C | +0.46 C |
| 1970 | 4.1 C | -0.21 C |
| 1971 | 4.6 C | +0.23 C |
| 1972 | 3.3 C | -1.06 C |
| 1973 | 5.2 C | +0.89 C |
| 1974 | 4.0 C | -0.37 C |
| 1975 | 4.9 C | +0.53 C |
| 1976 | 3.1 C | -1.23 C |
| 1977 | 4.7 C | +0.36 C |
| 1978 | 3.3 C | -1.07 C |
| 1979 | 4.1 C | -0.19 C |
| 1980 | 3.1 C | -1.26 C |
| 1981 | 4.6 C | +0.27 C |
| 1982 | 3.8 C | -0.55 C |
| 1983 | 4.5 C | +0.20 C |
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1931 to 1983| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.9 C (102.0 F) | 1931 | 33.3 C (91.9 F) | 52 |
| Coldest night (TNn) | -41.0 C (-41.8 F) | 1981 | -32.2 C (-26.0 F) | 52 |
| Wettest day (Rx1day) | 118.9 mm (4.7 in) | 1936 | 42.7 mm (1.7 in) | 52 |
| Wettest five days (Rx5day) | 127.4 mm (5.0 in) | 1956 | 62.4 mm (2.5 in) | 52 |
| Longest dry spell (CDD) | 27 days | 1932 | 16 days | 52 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1931 | 38.9 C (102.0 F) |
| 1932 | 31.7 C (89.1 F) |
| 1933 | 35.0 C (95.0 F) |
| 1934 | 35.0 C (95.0 F) |
| 1935 | 32.2 C (90.0 F) |
| 1936 | 34.4 C (93.9 F) |
| 1937 | 34.4 C (93.9 F) |
| 1938 | 35.0 C (95.0 F) |
| 1939 | 33.9 C (93.0 F) |
| 1940 | 32.8 C (91.0 F) |
| 1941 | 36.1 C (97.0 F) |
| 1943 | 32.8 C (91.0 F) |
| 1944 | 36.7 C (98.1 F) |
| 1945 | 33.3 C (91.9 F) |
| 1946 | 33.3 C (91.9 F) |
| 1947 | 35.0 C (95.0 F) |
| 1948 | 35.6 C (96.1 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 32.2 C (90.0 F) |
| 1951 | 31.1 C (88.0 F) |
| 1952 | 33.3 C (91.9 F) |
| 1953 | 35.6 C (96.1 F) |
| 1954 | 30.0 C (86.0 F) |
| 1955 | 35.6 C (96.1 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 | 32.2 C (90.0 F) |
| 1961 | 31.7 C (89.1 F) |
| 1962 | 33.9 C (93.0 F) |
| 1963 | 35.6 C (96.1 F) |
| 1964 | 34.4 C (93.9 F) |
| 1965 | 32.2 C (90.0 F) |
| 1966 | 34.4 C (93.9 F) |
| 1967 | 31.7 C (89.1 F) |
| 1968 | 32.8 C (91.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 31.1 C (88.0 F) |
| 1971 | 32.8 C (91.0 F) |
| 1972 | 32.2 C (90.0 F) |
| 1973 | 32.8 C (91.0 F) |
| 1974 | 32.2 C (90.0 F) |
| 1975 | 37.2 C (99.0 F) |
| 1976 | 32.2 C (90.0 F) |
| 1977 | 37.5 C (99.5 F) |
| 1978 | 33.5 C (92.3 F) |
| 1979 | 32.0 C (89.6 F) |
| 1980 | 31.5 C (88.7 F) |
| 1981 | 33.0 C (91.4 F) |
| 1982 | 32.5 C (90.5 F) |
| 1983 | 34.0 C (93.2 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1931 | -22.8 C (-9.0 F) |
| 1932 | -27.2 C (-17.0 F) |
| 1933 | -11.1 C (12.0 F) |
| 1934 | -6.7 C (19.9 F) |
| 1935 | -5.0 C (23.0 F) |
| 1936 | -11.1 C (12.0 F) |
| 1937 | -7.2 C (19.0 F) |
| 1938 | -5.6 C (21.9 F) |
| 1939 | -9.4 C (15.1 F) |
| 1940 | -7.8 C (18.0 F) |
| 1941 | -7.2 C (19.0 F) |
| 1943 | -6.1 C (21.0 F) |
| 1944 | -3.9 C (25.0 F) |
| 1945 | -5.6 C (21.9 F) |
| 1946 | -7.8 C (18.0 F) |
| 1947 | -6.1 C (21.0 F) |
| 1948 | -4.4 C (24.1 F) |
| 1949 | -4.4 C (24.1 F) |
| 1950 | -3.9 C (25.0 F) |
| 1951 | -35.6 C (-32.1 F) |
| 1952 | -37.8 C (-36.0 F) |
| 1953 | -30.0 C (-22.0 F) |
| 1954 | -36.7 C (-34.1 F) |
| 1955 | -32.2 C (-26.0 F) |
| 1956 | -28.9 C (-20.0 F) |
| 1957 | -40.6 C (-41.1 F) |
| 1958 | -32.8 C (-27.0 F) |
| 1959 | -34.4 C (-29.9 F) |
| 1960 | -32.2 C (-26.0 F) |
| 1961 | -33.3 C (-27.9 F) |
| 1962 | -36.7 C (-34.1 F) |
| 1963 | -33.9 C (-29.0 F) |
| 1964 | -30.0 C (-22.0 F) |
| 1965 | -32.2 C (-26.0 F) |
| 1966 | -33.9 C (-29.0 F) |
| 1967 | -36.1 C (-33.0 F) |
| 1968 | -36.7 C (-34.1 F) |
| 1969 | -30.6 C (-23.1 F) |
| 1970 | -36.1 C (-33.0 F) |
| 1971 | -36.1 C (-33.0 F) |
| 1972 | -35.6 C (-32.1 F) |
| 1973 | -35.6 C (-32.1 F) |
| 1974 | -30.6 C (-23.1 F) |
| 1975 | -33.9 C (-29.0 F) |
| 1976 | -38.3 C (-36.9 F) |
| 1977 | -34.4 C (-29.9 F) |
| 1978 | -30.0 C (-22.0 F) |
| 1979 | -35.5 C (-31.9 F) |
| 1980 | -35.0 C (-31.0 F) |
| 1981 | -41.0 C (-41.8 F) |
| 1982 | -36.5 C (-33.7 F) |
| 1983 | -35.5 C (-31.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1931 | 27.4 mm (1.1 in) |
| 1932 | 70.9 mm (2.8 in) |
| 1933 | 41.9 mm (1.6 in) |
| 1934 | 45.5 mm (1.8 in) |
| 1935 | 35.8 mm (1.4 in) |
| 1936 | 118.9 mm (4.7 in) |
| 1937 | 44.7 mm (1.8 in) |
| 1938 | 34.8 mm (1.4 in) |
| 1939 | 58.2 mm (2.3 in) |
| 1940 | 54.9 mm (2.2 in) |
| 1941 | 32.5 mm (1.3 in) |
| 1943 | 33.3 mm (1.3 in) |
| 1944 | 48.5 mm (1.9 in) |
| 1945 | 30.5 mm (1.2 in) |
| 1946 | 42.9 mm (1.7 in) |
| 1947 | 37.1 mm (1.5 in) |
| 1948 | 30.2 mm (1.2 in) |
| 1949 | 56.6 mm (2.2 in) |
| 1950 | 53.3 mm (2.1 in) |
| 1951 | 29.0 mm (1.1 in) |
| 1952 | 35.1 mm (1.4 in) |
| 1953 | 46.2 mm (1.8 in) |
| 1954 | 79.8 mm (3.1 in) |
| 1955 | 45.2 mm (1.8 in) |
| 1956 | 79.2 mm (3.1 in) |
| 1957 | 47.2 mm (1.9 in) |
| 1958 | 39.6 mm (1.6 in) |
| 1959 | 41.7 mm (1.6 in) |
| 1960 | 23.4 mm (0.9 in) |
| 1961 | 45.2 mm (1.8 in) |
| 1962 | 27.4 mm (1.1 in) |
| 1963 | 37.8 mm (1.5 in) |
| 1964 | 18.0 mm (0.7 in) |
| 1965 | 83.6 mm (3.3 in) |
| 1966 | 31.5 mm (1.2 in) |
| 1967 | 77.7 mm (3.1 in) |
| 1968 | 46.2 mm (1.8 in) |
| 1969 | 46.5 mm (1.8 in) |
| 1970 | 42.9 mm (1.7 in) |
| 1971 | 52.6 mm (2.1 in) |
| 1972 | 36.8 mm (1.4 in) |
| 1973 | 40.1 mm (1.6 in) |
| 1974 | 38.4 mm (1.5 in) |
| 1975 | 25.1 mm (1.0 in) |
| 1976 | 54.6 mm (2.1 in) |
| 1977 | 25.7 mm (1.0 in) |
| 1978 | 32.5 mm (1.3 in) |
| 1979 | 42.5 mm (1.7 in) |
| 1980 | 71.2 mm (2.8 in) |
| 1981 | 62.8 mm (2.5 in) |
| 1982 | 55.5 mm (2.2 in) |
| 1983 | 39.0 mm (1.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1931 | 32.7 mm (1.3 in) |
| 1932 | 79.5 mm (3.1 in) |
| 1933 | 53.8 mm (2.1 in) |
| 1934 | 58.9 mm (2.3 in) |
| 1935 | 60.3 mm (2.4 in) |
| 1936 | 125.8 mm (5.0 in) |
| 1937 | 56.2 mm (2.2 in) |
| 1938 | 61.7 mm (2.4 in) |
| 1939 | 93.6 mm (3.7 in) |
| 1940 | 78.5 mm (3.1 in) |
| 1941 | 46.6 mm (1.8 in) |
| 1943 | 61.3 mm (2.4 in) |
| 1944 | 67.3 mm (2.6 in) |
| 1945 | 52.3 mm (2.1 in) |
| 1946 | 71.6 mm (2.8 in) |
| 1947 | 55.3 mm (2.2 in) |
| 1948 | 51.1 mm (2.0 in) |
| 1949 | 66.1 mm (2.6 in) |
| 1950 | 84.4 mm (3.3 in) |
| 1951 | 63.0 mm (2.5 in) |
| 1952 | 72.7 mm (2.9 in) |
| 1953 | 50.3 mm (2.0 in) |
| 1954 | 97.6 mm (3.8 in) |
| 1955 | 126.5 mm (5.0 in) |
| 1956 | 127.4 mm (5.0 in) |
| 1957 | 85.0 mm (3.3 in) |
| 1958 | 63.7 mm (2.5 in) |
| 1959 | 55.7 mm (2.2 in) |
| 1960 | 44.9 mm (1.8 in) |
| 1961 | 51.6 mm (2.0 in) |
| 1962 | 45.0 mm (1.8 in) |
| 1963 | 52.0 mm (2.0 in) |
| 1964 | 47.7 mm (1.9 in) |
| 1965 | 90.7 mm (3.6 in) |
| 1966 | 60.1 mm (2.4 in) |
| 1967 | 100.9 mm (4.0 in) |
| 1968 | 60.9 mm (2.4 in) |
| 1969 | 70.7 mm (2.8 in) |
| 1970 | 78.4 mm (3.1 in) |
| 1971 | 52.6 mm (2.1 in) |
| 1972 | 78.7 mm (3.1 in) |
| 1973 | 66.6 mm (2.6 in) |
| 1974 | 64.8 mm (2.6 in) |
| 1975 | 39.8 mm (1.6 in) |
| 1976 | 59.1 mm (2.3 in) |
| 1977 | 42.4 mm (1.7 in) |
| 1978 | 52.5 mm (2.1 in) |
| 1979 | 61.6 mm (2.4 in) |
| 1980 | 74.6 mm (2.9 in) |
| 1981 | 81.6 mm (3.2 in) |
| 1982 | 67.2 mm (2.6 in) |
| 1983 | 63.0 mm (2.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1931 | 18 days |
| 1932 | 27 days |
| 1933 | 9 days |
| 1934 | 16 days |
| 1935 | 14 days |
| 1936 | 7 days |
| 1937 | 14 days |
| 1938 | 11 days |
| 1939 | 10 days |
| 1940 | 12 days |
| 1941 | 15 days |
| 1943 | 18 days |
| 1944 | 18 days |
| 1945 | 16 days |
| 1946 | 16 days |
| 1947 | 21 days |
| 1948 | 20 days |
| 1949 | 17 days |
| 1950 | 16 days |
| 1951 | 10 days |
| 1952 | 27 days |
| 1953 | 18 days |
| 1954 | 10 days |
| 1955 | 16 days |
| 1956 | 16 days |
| 1957 | 19 days |
| 1958 | 15 days |
| 1959 | 10 days |
| 1960 | 18 days |
| 1961 | 26 days |
| 1962 | 9 days |
| 1963 | 16 days |
| 1964 | 22 days |
| 1965 | 23 days |
| 1966 | 14 days |
| 1967 | 17 days |
| 1968 | 19 days |
| 1969 | 13 days |
| 1970 | 17 days |
| 1971 | 19 days |
| 1972 | 11 days |
| 1973 | 11 days |
| 1974 | 13 days |
| 1975 | 23 days |
| 1976 | 16 days |
| 1977 | 18 days |
| 1978 | 17 days |
| 1979 | 13 days |
| 1980 | 27 days |
| 1981 | 25 days |
| 1982 | 14 days |
| 1983 | 14 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
28 years with a frostAcross 28 years with a frost, the median last spring frost at Petawawa Nat Forestry falls on 25 May and the median first autumn frost on 17 September, which leaves a median of 116 days between them.
Fitted over all years, the growing season changes by +1.0 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1953 to 1983) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 25 May | n/a | 25 May | n/a | +2.0 days per decade |
| First autumn frost | 17 September | n/a | 17 September | n/a | +2.9 days per decade |
| Growing days | 116 days | n/a | 116 days | n/a | +1.0 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.
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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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).