North Bay A Weather Records (CA006085700)
Record envelope, standing records and threshold days for North Bay A (CA006085700), Ontario, Canada, with 87 years of record.
Key Facts for North Bay A
- North Bay A (CA006085700) is a weather station in Ontario, Canada at 46.37 latitude and -79.42 longitude, 370 m (1,214 ft) above sea level.
- The station reports from 1939 to 2025, 87 years of record.
- 1,464 records set at North Bay A still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- North Bay A set a daily record low maximum temperature of -17.3 C (0.9 F) on 24 December 1983.
About the Station
- Location: Ontario, Canada, 46.37 latitude, -79.42 longitude.
- Elevation: 370 m (1,214 ft).
- Period of record: 1939 to 2025, 87 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 | 12.2 C (54.0 F) | -40.0 C (-40.0 F) | n/a | n/a |
| Feb | 10.0 C (50.0 F) | -39.4 C (-38.9 F) | n/a | n/a |
| Mar | 23.9 C (75.0 F) | -36.7 C (-34.1 F) | n/a | n/a |
| Apr | 27.2 C (81.0 F) | -21.1 C (-6.0 F) | n/a | n/a |
| May | 31.6 C (88.9 F) | -8.3 C (17.1 F) | n/a | n/a |
| Jun | 33.3 C (91.9 F) | -1.7 C (28.9 F) | n/a | n/a |
| Jul | 33.9 C (93.0 F) | 2.8 C (37.0 F) | n/a | n/a |
| Aug | 33.3 C (91.9 F) | 0.0 C (32.0 F) | n/a | n/a |
| Sep | 33.3 C (91.9 F) | -4.4 C (24.1 F) | n/a | n/a |
| Oct | 26.7 C (80.1 F) | -11.7 C (10.9 F) | n/a | n/a |
| Nov | 20.0 C (68.0 F) | -23.9 C (-11.0 F) | n/a | n/a |
| Dec | 14.4 C (57.9 F) | -36.7 C (-34.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1939 | 41 |
| 1940 | 43 |
| 1941 | 23 |
| 1942 | 39 |
| 1943 | 53 |
| 1944 | 39 |
| 1945 | 52 |
| 1946 | 60 |
| 1947 | 44 |
| 1948 | 34 |
| 1949 | 48 |
| 1950 | 42 |
| 1951 | 34 |
| 1952 | 22 |
| 1953 | 38 |
| 1954 | 25 |
| 1955 | 25 |
| 1956 | 40 |
| 1957 | 31 |
| 1958 | 30 |
| 1959 | 31 |
| 1960 | 9 |
| 1961 | 18 |
| 1962 | 26 |
| 1963 | 29 |
| 1964 | 42 |
| 1965 | 37 |
| 1966 | 33 |
| 1967 | 29 |
| 1968 | 26 |
| 1969 | 19 |
| 1970 | 23 |
| 1971 | 17 |
| 1972 | 26 |
| 1973 | 26 |
| 1974 | 28 |
| 1975 | 29 |
| 1976 | 40 |
| 1977 | 29 |
| 1978 | 28 |
| 1979 | 35 |
| 1980 | 29 |
| 1981 | 36 |
| 1982 | 33 |
| 1983 | 23 |
Wettest Day of Each Month
Aug: 96.3 mm (3.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 31.8 mm (1.3 in) | 9 January 1939 |
| Feb | 27.4 mm (1.1 in) | 10 February 1960 |
| Mar | 48.3 mm (1.9 in) | 10 March 1943 |
| Apr | 73.7 mm (2.9 in) | 1 April 1939 |
| May | 50.0 mm (2.0 in) | 31 May 1970 |
| Jun | 63.8 mm (2.5 in) | 29 June 1957 |
| Jul | 75.1 mm (3.0 in) | 24 July 1977 |
| Aug | 96.3 mm (3.8 in) | 31 August 1952 |
| Sep | 66.8 mm (2.6 in) | 13 September 1947 |
| Oct | 75.2 mm (3.0 in) | 3 October 1983 |
| Nov | 37.1 mm (1.5 in) | 10 November 1977 |
| Dec | 38.4 mm (1.5 in) | 4 December 1961 |
Period of Record Coverage
1939 to 1983| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1939 | 364 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 363 | 99% | Yes |
| 1942 | 363 | 99% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 364 | 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 | 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 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 24 December 1983 | North Bay A, CA | daily low max | -17.3 C (0.9 F) | 0.6 C (1.1 F) | 13 years | 8 of 100 (Routine) |
| 24 November 1983 | North Bay A, CA | daily high max | 7.8 C (46.0 F) | 1.1 C (2.0 F) | 29 years | 13 of 100 (Routine) |
| 18 November 1983 | North Bay A, CA | daily low min | -15.2 C (4.6 F) | 1.0 C (1.8 F) | 2 years | 5 of 100 (Routine) |
| 12 November 1983 | North Bay A, CA | daily low max | -5.0 C (23.0 F) | 0.6 C (1.1 F) | 5 years | 6 of 100 (Routine) |
| 3 October 1983 | North Bay A, CA | monthly rain | 75.2 mm (3.0 in) | 26.4 mm (1.0 in) | 13 years | 52 of 100 (Notable) |
| 2 October 1983 | North Bay A, CA | daily high min | 15.1 C (59.2 F) | 1.2 C (2.2 F) | 32 years | 15 of 100 (Routine) |
| 20 September 1983 | North Bay A, CA | daily rain | 60.8 mm (2.4 in) | 8.7 mm (0.34 in) | 12 years | 15 of 100 (Routine) |
| 5 September 1983 | North Bay A, CA | daily high min | 19.5 C (67.1 F) | 0.1 C (0.2 F) | 12 years | 7 of 100 (Routine) |
| 17 August 1983 | North Bay A, CA | daily rain | 41.2 mm (1.6 in) | 0.6 mm (0.02 in) | 20 years | 10 of 100 (Routine) |
| 15 July 1983 | North Bay A, CA | daily high max | 32.4 C (90.3 F) | 3.0 C (5.4 F) | 14 years | 16 of 100 (Routine) |
| 15 July 1983 | North Bay A, CA | daily high min | 20.1 C (68.2 F) | 0.7 C (1.3 F) | 28 years | 14 of 100 (Routine) |
| 27 June 1983 | North Bay A, CA | daily low min | 6.8 C (44.2 F) | 0.1 C (0.2 F) | 2 years | 4 of 100 (Routine) |
| 22 June 1983 | North Bay A, CA | daily high max | 29.2 C (84.6 F) | 0.9 C (1.6 F) | 25 years | 13 of 100 (Routine) |
| 21 June 1983 | North Bay A, CA | daily high max (Tie) | 30.6 C (87.1 F) | tie | 41 years | 4 of 100 (Routine) |
| 20 June 1983 | North Bay A, CA | daily high max | 29.5 C (85.1 F) | 1.2 C (2.2 F) | 41 years | 18 of 100 (Routine) |
| 15 June 1983 | North Bay A, CA | daily high max | 30.1 C (86.2 F) | 2.3 C (4.1 F) | 33 years | 19 of 100 (Routine) |
| 14 June 1983 | North Bay A, CA | daily high max | 29.6 C (85.3 F) | 0.2 C (0.4 F) | 26 years | 12 of 100 (Routine) |
| 9 June 1983 | North Bay A, CA | daily rain | 17.8 mm (0.7 in) | 2.8 mm (0.11 in) | 8 years | 9 of 100 (Routine) |
| 27 May 1983 | North Bay A, CA | daily low max | 7.1 C (44.8 F) | 3.5 C (6.3 F) | 36 years | 19 of 100 (Routine) |
| 26 May 1983 | North Bay A, CA | daily low max | 6.4 C (43.5 F) | 0.3 C (0.5 F) | 21 years | 10 of 100 (Routine) |
Climate Trend
45 complete years, 1939 to 1983| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1939 | 3.0 C | -0.55 C |
| 1940 | 2.4 C | -1.17 C |
| 1941 | 3.8 C | +0.19 C |
| 1942 | 3.8 C | +0.20 C |
| 1943 | 2.6 C | -1.02 C |
| 1944 | 4.1 C | +0.54 C |
| 1945 | 3.5 C | -0.04 C |
| 1946 | 3.9 C | +0.29 C |
| 1947 | 3.5 C | -0.05 C |
| 1948 | 3.9 C | +0.34 C |
| 1949 | 4.3 C | +0.70 C |
| 1950 | 2.9 C | -0.71 C |
| 1951 | 3.6 C | -0.02 C |
| 1952 | 4.5 C | +0.94 C |
| 1953 | 5.3 C | +1.67 C |
| 1954 | 3.6 C | +0.00 C |
| 1955 | 4.5 C | +0.92 C |
| 1956 | 3.1 C | -0.46 C |
| 1957 | 4.1 C | +0.50 C |
| 1958 | 3.5 C | -0.04 C |
| 1959 | 3.7 C | +0.11 C |
| 1960 | 3.9 C | +0.34 C |
| 1961 | 4.1 C | +0.51 C |
| 1962 | 3.6 C | +0.02 C |
| 1963 | 3.3 C | -0.29 C |
| 1964 | 4.0 C | +0.43 C |
| 1965 | 2.9 C | -0.72 C |
| 1966 | 3.3 C | -0.29 C |
| 1967 | 3.1 C | -0.50 C |
| 1968 | 3.7 C | +0.07 C |
| 1969 | 3.5 C | -0.06 C |
| 1970 | 3.1 C | -0.49 C |
| 1971 | 3.8 C | +0.23 C |
| 1972 | 2.4 C | -1.21 C |
| 1973 | 4.5 C | +0.91 C |
| 1974 | 3.0 C | -0.59 C |
| 1975 | 4.2 C | +0.62 C |
| 1976 | 2.5 C | -1.04 C |
| 1977 | 3.8 C | +0.23 C |
| 1978 | 2.8 C | -0.75 C |
| 1979 | 3.6 C | -0.02 C |
| 1980 | 2.6 C | -0.95 C |
| 1981 | 4.1 C | +0.54 C |
| 1982 | 3.5 C | -0.04 C |
| 1983 | 4.2 C | +0.62 C |
The fitted trend in annual mean temperature here over 1939 to 1983 is -0.04 C (-0.18 to 0.11) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.2) 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 | -0.04 C (-0.18 to 0.11) per decade | -0.1 F (-0.3 to 0.2) per decade | 1939 to 1983 | 45 | Not clearly different from zero |
| Mean daily maximum | -0.10 C (-0.25 to 0.04) per decade | -0.2 F (-0.5 to 0.1) per decade | 1939 to 1983 | 45 | Not clearly different from zero |
| Mean daily minimum | 0.03 C (-0.14 to 0.21) per decade | 0.1 F (-0.2 to 0.4) per decade | 1939 to 1983 | 45 | 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
1939 to 1983| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 33.9 C (93.0 F) | 1966 | 30.6 C (87.1 F) | 45 |
| Coldest night (TNn) | -40.0 C (-40.0 F) | 1942 | -33.3 C (-27.9 F) | 45 |
| Wettest day (Rx1day) | 96.3 mm (3.8 in) | 1952 | 47.8 mm (1.9 in) | 45 |
| Wettest five days (Rx5day) | 136.9 mm (5.4 in) | 1972 | 79.1 mm (3.1 in) | 45 |
| Longest dry spell (CDD) | 26 days | 1961 | 14 days | 45 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1939 | 31.1 C (88.0 F) |
| 1940 | 30.6 C (87.1 F) |
| 1941 | 31.7 C (89.1 F) |
| 1942 | 30.0 C (86.0 F) |
| 1943 | 31.1 C (88.0 F) |
| 1944 | 33.3 C (91.9 F) |
| 1945 | 30.0 C (86.0 F) |
| 1946 | 31.1 C (88.0 F) |
| 1947 | 32.8 C (91.0 F) |
| 1948 | 33.3 C (91.9 F) |
| 1949 | 32.2 C (90.0 F) |
| 1950 | 29.4 C (84.9 F) |
| 1951 | 28.9 C (84.0 F) |
| 1952 | 31.7 C (89.1 F) |
| 1953 | 33.3 C (91.9 F) |
| 1954 | 28.3 C (82.9 F) |
| 1955 | 32.8 C (91.0 F) |
| 1956 | 31.1 C (88.0 F) |
| 1957 | 29.4 C (84.9 F) |
| 1958 | 28.3 C (82.9 F) |
| 1959 | 31.1 C (88.0 F) |
| 1960 | 27.8 C (82.0 F) |
| 1961 | 28.3 C (82.9 F) |
| 1962 | 30.6 C (87.1 F) |
| 1963 | 32.2 C (90.0 F) |
| 1964 | 31.7 C (89.1 F) |
| 1965 | 27.2 C (81.0 F) |
| 1966 | 33.9 C (93.0 F) |
| 1967 | 29.4 C (84.9 F) |
| 1968 | 31.7 C (89.1 F) |
| 1969 | 29.4 C (84.9 F) |
| 1970 | 31.1 C (88.0 F) |
| 1971 | 29.4 C (84.9 F) |
| 1972 | 28.3 C (82.9 F) |
| 1973 | 29.4 C (84.9 F) |
| 1974 | 28.9 C (84.0 F) |
| 1975 | 32.8 C (91.0 F) |
| 1976 | 30.0 C (86.0 F) |
| 1977 | 32.0 C (89.6 F) |
| 1978 | 31.3 C (88.3 F) |
| 1979 | 30.6 C (87.1 F) |
| 1980 | 29.2 C (84.6 F) |
| 1981 | 29.8 C (85.6 F) |
| 1982 | 28.5 C (83.3 F) |
| 1983 | 32.4 C (90.3 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1939 | -32.8 C (-27.0 F) |
| 1940 | -33.3 C (-27.9 F) |
| 1941 | -31.1 C (-24.0 F) |
| 1942 | -40.0 C (-40.0 F) |
| 1943 | -39.4 C (-38.9 F) |
| 1944 | -31.1 C (-24.0 F) |
| 1945 | -38.3 C (-36.9 F) |
| 1946 | -37.2 C (-35.0 F) |
| 1947 | -35.6 C (-32.1 F) |
| 1948 | -35.6 C (-32.1 F) |
| 1949 | -27.8 C (-18.0 F) |
| 1950 | -36.7 C (-34.1 F) |
| 1951 | -35.6 C (-32.1 F) |
| 1952 | -34.4 C (-29.9 F) |
| 1953 | -30.0 C (-22.0 F) |
| 1954 | -32.2 C (-26.0 F) |
| 1955 | -32.2 C (-26.0 F) |
| 1956 | -31.7 C (-25.1 F) |
| 1957 | -34.4 C (-29.9 F) |
| 1958 | -28.9 C (-20.0 F) |
| 1959 | -33.9 C (-29.0 F) |
| 1960 | -32.2 C (-26.0 F) |
| 1961 | -28.9 C (-20.0 F) |
| 1962 | -33.9 C (-29.0 F) |
| 1963 | -31.1 C (-24.0 F) |
| 1964 | -31.7 C (-25.1 F) |
| 1965 | -35.0 C (-31.0 F) |
| 1966 | -31.7 C (-25.1 F) |
| 1967 | -36.1 C (-33.0 F) |
| 1968 | -37.8 C (-36.0 F) |
| 1969 | -27.2 C (-17.0 F) |
| 1970 | -33.3 C (-27.9 F) |
| 1971 | -32.2 C (-26.0 F) |
| 1972 | -36.1 C (-33.0 F) |
| 1973 | -31.7 C (-25.1 F) |
| 1974 | -30.0 C (-22.0 F) |
| 1975 | -35.6 C (-32.1 F) |
| 1976 | -37.2 C (-35.0 F) |
| 1977 | -32.0 C (-25.6 F) |
| 1978 | -28.5 C (-19.3 F) |
| 1979 | -34.5 C (-30.1 F) |
| 1980 | -34.6 C (-30.3 F) |
| 1981 | -37.7 C (-35.9 F) |
| 1982 | -38.4 C (-37.1 F) |
| 1983 | -31.0 C (-23.8 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1939 | 73.7 mm (2.9 in) |
| 1940 | 60.2 mm (2.4 in) |
| 1941 | 47.8 mm (1.9 in) |
| 1942 | 45.7 mm (1.8 in) |
| 1943 | 50.5 mm (2.0 in) |
| 1944 | 50.0 mm (2.0 in) |
| 1945 | 35.1 mm (1.4 in) |
| 1946 | 31.0 mm (1.2 in) |
| 1947 | 66.8 mm (2.6 in) |
| 1948 | 59.4 mm (2.3 in) |
| 1949 | 44.2 mm (1.7 in) |
| 1950 | 25.1 mm (1.0 in) |
| 1951 | 37.6 mm (1.5 in) |
| 1952 | 96.3 mm (3.8 in) |
| 1953 | 27.9 mm (1.1 in) |
| 1954 | 39.4 mm (1.6 in) |
| 1955 | 38.4 mm (1.5 in) |
| 1956 | 36.6 mm (1.4 in) |
| 1957 | 63.8 mm (2.5 in) |
| 1958 | 56.4 mm (2.2 in) |
| 1959 | 61.5 mm (2.4 in) |
| 1960 | 46.7 mm (1.8 in) |
| 1961 | 38.4 mm (1.5 in) |
| 1962 | 26.4 mm (1.0 in) |
| 1963 | 40.6 mm (1.6 in) |
| 1964 | 32.5 mm (1.3 in) |
| 1965 | 50.8 mm (2.0 in) |
| 1966 | 34.0 mm (1.3 in) |
| 1967 | 50.0 mm (2.0 in) |
| 1968 | 36.8 mm (1.4 in) |
| 1969 | 49.3 mm (1.9 in) |
| 1970 | 59.7 mm (2.4 in) |
| 1971 | 52.1 mm (2.1 in) |
| 1972 | 63.2 mm (2.5 in) |
| 1973 | 42.2 mm (1.7 in) |
| 1974 | 51.6 mm (2.0 in) |
| 1975 | 49.8 mm (2.0 in) |
| 1976 | 38.6 mm (1.5 in) |
| 1977 | 75.1 mm (3.0 in) |
| 1978 | 56.6 mm (2.2 in) |
| 1979 | 46.9 mm (1.8 in) |
| 1980 | 49.4 mm (1.9 in) |
| 1981 | 44.8 mm (1.8 in) |
| 1982 | 43.6 mm (1.7 in) |
| 1983 | 75.2 mm (3.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1939 | 82.1 mm (3.2 in) |
| 1940 | 101.6 mm (4.0 in) |
| 1941 | 79.1 mm (3.1 in) |
| 1942 | 63.6 mm (2.5 in) |
| 1943 | 116.8 mm (4.6 in) |
| 1944 | 89.2 mm (3.5 in) |
| 1945 | 48.1 mm (1.9 in) |
| 1946 | 54.8 mm (2.2 in) |
| 1947 | 132.9 mm (5.2 in) |
| 1948 | 124.0 mm (4.9 in) |
| 1949 | 82.3 mm (3.2 in) |
| 1950 | 43.7 mm (1.7 in) |
| 1951 | 78.8 mm (3.1 in) |
| 1952 | 126.8 mm (5.0 in) |
| 1953 | 46.8 mm (1.8 in) |
| 1954 | 86.1 mm (3.4 in) |
| 1955 | 98.1 mm (3.9 in) |
| 1956 | 59.2 mm (2.3 in) |
| 1957 | 113.0 mm (4.4 in) |
| 1958 | 112.8 mm (4.4 in) |
| 1959 | 74.5 mm (2.9 in) |
| 1960 | 61.0 mm (2.4 in) |
| 1961 | 59.9 mm (2.4 in) |
| 1962 | 47.4 mm (1.9 in) |
| 1963 | 81.0 mm (3.2 in) |
| 1964 | 56.1 mm (2.2 in) |
| 1965 | 96.1 mm (3.8 in) |
| 1966 | 56.1 mm (2.2 in) |
| 1967 | 67.8 mm (2.7 in) |
| 1968 | 67.8 mm (2.7 in) |
| 1969 | 66.4 mm (2.6 in) |
| 1970 | 121.7 mm (4.8 in) |
| 1971 | 59.0 mm (2.3 in) |
| 1972 | 136.9 mm (5.4 in) |
| 1973 | 55.9 mm (2.2 in) |
| 1974 | 90.5 mm (3.6 in) |
| 1975 | 83.1 mm (3.3 in) |
| 1976 | 71.4 mm (2.8 in) |
| 1977 | 93.1 mm (3.7 in) |
| 1978 | 71.4 mm (2.8 in) |
| 1979 | 55.0 mm (2.2 in) |
| 1980 | 88.4 mm (3.5 in) |
| 1981 | 88.2 mm (3.5 in) |
| 1982 | 79.1 mm (3.1 in) |
| 1983 | 96.4 mm (3.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1939 | 18 days |
| 1940 | 12 days |
| 1941 | 18 days |
| 1942 | 15 days |
| 1943 | 11 days |
| 1944 | 18 days |
| 1945 | 23 days |
| 1946 | 12 days |
| 1947 | 10 days |
| 1948 | 22 days |
| 1949 | 13 days |
| 1950 | 11 days |
| 1951 | 11 days |
| 1952 | 15 days |
| 1953 | 14 days |
| 1954 | 9 days |
| 1955 | 10 days |
| 1956 | 17 days |
| 1957 | 15 days |
| 1958 | 17 days |
| 1959 | 10 days |
| 1960 | 14 days |
| 1961 | 26 days |
| 1962 | 15 days |
| 1963 | 14 days |
| 1964 | 14 days |
| 1965 | 18 days |
| 1966 | 17 days |
| 1967 | 20 days |
| 1968 | 11 days |
| 1969 | 14 days |
| 1970 | 15 days |
| 1971 | 13 days |
| 1972 | 13 days |
| 1973 | 15 days |
| 1974 | 13 days |
| 1975 | 13 days |
| 1976 | 19 days |
| 1977 | 18 days |
| 1978 | 18 days |
| 1979 | 13 days |
| 1980 | 19 days |
| 1981 | 12 days |
| 1982 | 15 days |
| 1983 | 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
45 years with a frostAcross 45 years with a frost, the median last spring frost at North Bay A falls on 18 May and the median first autumn frost on 26 September, which leaves a median of 132 days between them.
Fitted over all years, the growing season changes by +2.6 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 | 18 May | n/a | 18 May | n/a | -1.3 days per decade |
| First autumn frost | 26 September | n/a | 26 September | n/a | +1.2 days per decade |
| Growing days | 132 days | n/a | 133 days | n/a | +2.6 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
45 years, 1939 to 1983A day with at least 46.9 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 92.2 mm (3.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 46.9 mm (1.8 in) | |
| 5 years | 59.9 mm (2.4 in) | |
| 10 years | 68.2 mm (2.7 in) | |
| 25 years | 78.2 mm (3.1 in) | |
| 50 years | 85.4 mm (3.4 in) | Longer than the 45 years of record |
| 100 years | 92.2 mm (3.6 in) | Longer than the 45 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, 45 years of values from 1939 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: 96.3 mm (3.8 in) in 1952; 75.2 mm (3.0 in) in 1983; 75.1 mm (3.0 in) in 1977.
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).