Historical Monthly Mean Water Levels from the Coordinated network for Lake St. Clair

Monthly mean water levels in metres referred to IGLD 1985

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Average Min Max Range
1918 174.59 174.74 174.74 174.84 175.00 175.14 175.17 175.16 175.10 175.03 174.98 174.99 174.96 174.59 175.17 0.58
1919 175.14 174.88 175.00 175.14 175.30 175.32 175.25 175.16 175.06 175.00 174.91 174.76 175.08 174.76 175.32 0.56
1920 174.30 174.40 174.58 174.82 174.95 175.01 175.07 175.08 175.01 174.92 174.84 174.81 174.82 174.30 175.08 0.78
1921 174.87 174.43 174.80 175.00 175.07 175.08 175.06 174.97 174.88 174.77 174.74 174.76 174.87 174.43 175.08 0.65
1922 174.58 174.39 174.62 174.92 174.99 175.00 175.07 175.02 174.97 174.83 174.69 174.65 174.81 174.39 175.07 0.68
1923 174.53 174.40 174.52 174.63 174.76 174.82 174.85 174.79 174.75 174.66 174.56 174.56 174.65 174.40 174.85 0.45
1924 174.58 174.29 174.41 174.63 174.76 174.81 174.88 174.85 174.79 174.71 174.52 174.42 174.64 174.29 174.88 0.59
1925 174.28 174.18 174.39 174.52 174.51 174.52 174.55 174.54 174.48 174.36 174.30 174.24 174.41 174.18 174.55 0.37
1926 173.94 173.89 174.08 174.32 174.48 174.53 174.58 174.60 174.60 174.62 174.57 174.61 174.40 173.89 174.62 0.73
1927 174.26 174.12 174.35 174.65 174.73 174.83 174.88 174.83 174.71 174.64 174.54 174.64 174.60 174.12 174.88 0.76
1928 174.61 174.46 174.35 174.73 174.84 174.94 175.06 175.05 174.94 174.90 174.89 174.89 174.80 174.35 175.06 0.71
1929 175.01 175.13 175.09 175.32 175.48 175.49 175.52 175.44 175.34 175.20 175.10 175.05 175.26 175.01 175.52 0.51
1930 175.07 174.98 175.21 175.29 175.29 175.26 175.27 175.19 175.07 174.97 174.80 174.74 175.10 174.74 175.29 0.55
1931 174.57 174.15 174.13 174.56 174.66 174.70 174.72 174.67 174.58 174.51 174.43 174.42 174.51 174.13 174.72 0.59
1932 174.56 174.60 174.35 174.58 174.68 174.69 174.66 174.60 174.57 174.46 174.45 174.59 174.57 174.35 174.69 0.34
1933 174.45 174.26 174.41 174.66 174.76 174.77 174.77 174.70 174.58 174.46 174.36 174.38 174.55 174.26 174.77 0.51
1934 174.01 174.04 174.05 174.36 174.42 174.45 174.50 174.41 174.34 174.27 174.18 174.26 174.27 174.01 174.50 0.49
1935 174.21 173.93 174.22 174.37 174.44 174.50 174.57 174.57 174.48 174.38 174.36 174.30 174.36 173.93 174.57 0.64
1936 173.88 174.13 174.36 174.49 174.56 174.59 174.55 174.48 174.49 174.45 174.36 174.38 174.39 173.88 174.59 0.71
1937 174.48 174.38 174.47 174.61 174.74 174.77 174.83 174.78 174.66 174.54 174.42 174.56 174.60 174.38 174.83 0.45
1938 174.28 174.51 174.41 174.74 174.79 174.85 174.90 174.90 174.84 174.78 174.67 174.60 174.69 174.28 174.90 0.62
1939 174.64 174.13 174.38 174.80 174.87 174.94 174.97 174.93 174.89 174.78 174.70 174.62 174.72 174.13 174.97 0.84
1940 174.36 174.23 174.30 174.69 174.72 174.84 174.88 174.86 174.82 174.76 174.62 174.66 174.64 174.23 174.88 0.65
1941 174.56 174.28 174.42 174.58 174.69 174.75 174.73 174.68 174.62 174.60 174.54 174.53 174.58 174.28 174.75 0.47
1942 174.42 174.07 174.42 174.83 174.90 175.03 175.04 175.02 174.94 174.90 174.82 174.82 174.77 174.07 175.04 0.97
1943 174.70 174.57 174.84 174.99 175.25 175.36 175.44 175.41 175.34 175.24 175.14 175.07 175.11 174.57 175.44 0.87
1944 174.53 174.68 174.74 175.09 175.18 175.23 175.22 175.16 175.09 175.04 174.93 174.89 174.98 174.53 175.23 0.70
1945 174.73 174.62 174.89 175.03 175.18 175.28 175.33 175.28 175.22 175.24 175.10 175.17 175.09 174.62 175.33 0.71
1946 174.96 174.60 175.04 175.12 175.15 175.29 175.30 175.21 175.10 175.00 174.89 174.80 175.04 174.60 175.30 0.70
1947 174.61 174.60 174.75 175.15 175.26 175.41 175.40 175.38 175.34 175.22 175.09 175.04 175.10 174.60 175.41 0.81
1948 174.98 174.90 175.07 175.22 175.35 175.32 175.32 175.24 175.13 174.96 174.86 174.82 175.10 174.82 175.35 0.53
1949 174.89 174.88 174.70 174.94 174.96 174.98 175.00 174.93 174.80 174.75 174.58 174.57 174.83 174.57 175.00 0.43
1950 174.72 174.70 174.71 175.04 175.05 175.04 175.07 175.02 175.01 174.95 174.86 174.99 174.93 174.70 175.07 0.37
1951 174.86 174.89 175.12 175.25 175.34 175.38 175.41 175.38 175.31 175.29 175.26 175.40 175.24 174.86 175.41 0.55
1952 175.49 175.41 175.51 175.59 175.60 175.63 175.66 175.65 175.57 175.41 175.24 175.23 175.50 175.23 175.66 0.43
1953 175.25 175.21 175.29 175.32 175.41 175.49 175.52 175.49 175.39 175.29 175.16 175.06 175.32 175.06 175.52 0.46
1954 174.81 174.74 175.13 175.29 175.36 175.39 175.41 175.38 175.30 175.39 175.33 175.29 175.24 174.74 175.41 0.67
1955 175.30 175.15 175.36 175.38 175.41 175.43 175.40 175.35 175.22 175.09 174.98 174.95 175.25 174.95 175.43 0.48
1956 174.38 174.24 174.78 174.98 175.24 175.22 175.24 175.25 175.19 175.04 174.87 174.84 174.94 174.24 175.25 1.01
1957 174.57 174.58 174.80 174.94 175.02 175.03 175.14 175.06 174.98 174.88 174.76 174.80 174.88 174.57 175.14 0.57
1958 174.47 174.30 174.65 174.56 174.73 174.76 174.82 174.80 174.76 174.64 174.51 174.55 174.63 174.30 174.82 0.52
1959 174.18 174.28 174.59 174.75 174.83 174.86 174.81 174.79 174.73 174.70 174.65 174.71 174.66 174.18 174.86 0.68
1960 174.72 174.54 174.71 174.97 175.07 175.21 175.24 175.25 175.20 175.09 174.94 174.94 174.99 174.54 175.25 0.71
1961 174.76 174.76 174.93 175.02 175.16 175.14 175.12 175.12 175.04 174.92 174.83 174.76 174.96 174.76 175.16 0.40
1962 174.70 174.38 174.79 174.86 174.89 174.94 174.90 174.88 174.82 174.74 174.70 174.64 174.77 174.38 174.94 0.56
1963 174.48 174.36 174.53 174.68 174.72 174.72 174.69 174.66 174.60 174.50 174.40 174.38 174.56 174.36 174.72 0.36
1964 174.14 174.14 174.32 174.45 174.54 174.53 174.52 174.50 174.44 174.32 174.24 174.24 174.36 174.14 174.54 0.40
1965 174.14 174.20 174.44 174.58 174.64 174.68 174.66 174.66 174.64 174.60 174.56 174.60 174.53 174.14 174.68 0.54
1966 174.64 174.58 174.71 174.81 174.90 174.93 174.91 174.85 174.78 174.62 174.60 174.75 174.76 174.58 174.93 0.35
1967 174.76 174.64 174.76 174.94 175.01 175.07 175.10 175.06 174.98 174.92 174.90 174.96 174.92 174.64 175.10 0.46
1968 174.91 175.02 175.00 175.04 175.08 175.15 175.20 175.18 175.14 175.03 174.97 175.01 175.06 174.91 175.20 0.29
1969 175.00 175.06 175.07 175.24 175.36 175.42 175.54 175.49 175.38 175.26 175.18 175.14 175.26 175.00 175.54 0.54
1970 174.77 174.88 175.07 175.17 175.22 175.31 175.32 175.30 175.25 175.20 175.15 175.16 175.15 174.77 175.32 0.55
1971 175.14 175.06 175.23 175.29 175.34 175.40 175.40 175.40 175.37 175.28 175.16 175.16 175.27 175.06 175.40 0.34
1972 175.22 175.20 175.25 175.32 175.45 175.48 175.54 175.54 175.53 175.49 175.51 175.52 175.42 175.20 175.54 0.34
1973 175.56 175.54 175.68 175.73 175.74 175.82 175.82 175.76 175.66 175.56 175.46 175.47 175.65 175.46 175.82 0.36
1974 175.56 175.57 175.67 175.71 175.77 175.76 175.77 175.70 175.60 175.46 175.39 175.40 175.61 175.39 175.77 0.38
1975 175.44 175.45 175.48 175.56 175.58 175.64 175.62 175.60 175.61 175.48 175.36 175.37 175.52 175.36 175.64 0.28
1976 175.37 175.32 175.61 175.64 175.69 175.66 175.68 175.62 175.50 175.36 175.18 175.11 175.48 175.11 175.69 0.58
1977 175.10 175.16 175.15 175.26 175.30 175.24 175.24 175.22 175.22 175.18 175.10 175.22 175.20 175.10 175.30 0.20
1978 175.33 175.31 175.27 175.38 175.38 175.38 175.35 175.29 175.25 175.18 175.10 175.03 175.27 175.03 175.38 0.35
1979 175.16 175.16 175.18 175.40 175.44 175.48 175.50 175.49 175.47 175.36 175.30 175.33 175.36 175.16 175.50 0.34
1980 175.36 175.32 175.32 175.50 175.49 175.53 175.53 175.56 175.50 175.35 175.23 175.20 175.41 175.20 175.56 0.36
1981 174.91 175.21 175.22 175.26 175.36 175.40 175.46 175.43 175.42 175.38 175.28 175.22 175.30 174.91 175.46 0.55
1982 175.28 175.20 175.32 175.40 175.37 175.40 175.40 175.34 175.26 175.18 175.18 175.26 175.30 175.18 175.40 0.22
1983 175.26 175.25 175.30 175.41 175.55 175.59 175.60 175.60 175.48 175.38 175.34 175.44 175.43 175.25 175.60 0.35
1984 175.39 175.36 175.50 175.02 175.46 175.58 175.60 175.58 175.52 175.46 175.40 175.35 175.44 175.02 175.60 0.58
1985 175.48 175.56 175.72 175.81 175.79 175.79 175.76 175.72 175.68 175.60 175.73 175.76 175.70 175.48 175.81 0.33
1986 175.80 175.80 175.80 175.82 175.83 175.92 175.93 175.90 175.84 175.96 175.82 175.80 175.85 175.80 175.96 0.16
1987 175.77 175.62 175.56 175.71 175.66 175.66 175.66 175.60 175.52 175.36 175.29 175.32 175.56 175.29 175.77 0.48
1988 175.33 175.28 175.24 175.33 175.33 175.30 175.24 175.20 175.10 175.00 174.99 174.98 175.19 174.98 175.33 0.35
1989 175.02 175.04 174.96 175.10 175.14 175.32 175.34 175.26 175.20 175.04 174.93 174.96 175.11 174.93 175.34 0.41
1990 174.90 175.02 175.08 175.10 175.16 175.21 175.26 175.25 175.24 175.16 175.09 175.10 175.13 174.90 175.26 0.36
1991 175.24 175.12 175.19 175.27 175.34 175.39 175.34 175.30 175.19 175.04 174.96 174.99 175.20 174.96 175.39 0.43
1992 175.01 175.04 175.10 175.18 175.25 175.26 175.33 175.35 175.36 175.24 175.28 175.24 175.22 175.01 175.36 0.35
1993 175.40 175.26 175.34 175.42 175.43 175.48 175.56 175.51 175.44 175.30 175.21 175.22 175.38 175.21 175.56 0.35
1994 175.06 175.16 175.18 175.32 175.37 175.40 175.49 175.48 175.39 175.29 175.18 175.16 175.29 175.06 175.49 0.43
1995 175.22 175.09 175.08 175.19 175.26 175.31 175.34 175.35 175.22 175.08 175.05 175.01 175.18 175.01 175.35 0.34
1996 174.74 175.01 175.00 174.85 175.31 175.45 175.50 175.48 175.47 175.42 175.36 175.37 175.25 174.74 175.50 0.76
1997 175.52 175.51 175.62 175.62 175.68 175.81 175.83 175.76 175.68 175.55 175.41 175.36 175.61 175.36 175.83 0.47
1998 175.45 175.47 175.52 175.61 175.63 175.58 175.56 175.48 175.35 175.19 175.00 174.93 175.40 174.93 175.63 0.70
1999 175.10 174.99 174.96 175.05 175.05 175.11 175.12 175.07 174.96 174.85 174.75 174.70 174.98 174.70 175.12 0.42
2000 174.63 174.44 174.66 174.76 174.85 174.96 175.05 175.03 174.93 174.80 174.65 174.75 174.79 174.44 175.05 0.61
2001 174.71 174.69 174.70 174.74 174.79 174.89 174.89 174.81 174.75 174.73 174.70 174.74 174.76 174.69 174.89 0.20
2002 174.69 174.77 174.80 174.94 175.03 175.09 175.10 175.05 174.96 174.84 174.72 174.62 174.88 174.62 175.10 0.48
2003 174.60 174.60 174.53 174.73 174.82 174.89 174.92 174.92 174.82 174.69 174.65 174.68 174.74 174.53 174.92 0.39
2004 174.68 174.66 174.77 174.86 175.00 175.12 175.15 175.12 175.07 174.89 174.82 174.86 174.92 174.66 175.15 0.49
2005 174.99 175.00 174.99 175.08 175.08 175.05 175.03 174.96 174.90 174.82 174.65 174.71 174.94 174.65 175.08 0.43
2006 174.73 174.80 174.84 174.88 174.93 174.99 175.02 175.01 174.92 174.86 174.85 174.87 174.89 174.73 175.02 0.29
2007 174.97 174.86 174.91 174.96 175.02 174.99 174.92 174.90 174.83 174.70 174.56 174.56 174.85 174.56 175.02 0.46
2008 174.66 174.85 174.88 174.99 175.00 175.05 175.12 175.05 175.01 174.85 174.77 174.81 174.92 174.66 175.12 0.46
2009 174.94 174.96 175.06 175.14 175.20 175.25 175.24 175.20 175.13 174.99 174.94 174.87 175.08 174.87 175.25 0.38
2010 174.74 174.44 174.76 174.90 174.98 175.08 175.09 175.05 174.92 174.85 174.72 174.70 174.85 174.44 175.09 0.65
2011 174.48 174.50 174.67 174.89 175.15 175.22 175.21 175.16 175.08 175.02 174.95 175.08 174.95 174.48 175.22 0.74
2012 175.02 174.99 174.99 174.99 174.98 174.98 174.94 174.85 174.75 174.61 174.59 174.54 174.85 174.54 175.02 0.48
2013 174.52 174.54 174.64 174.75 174.84 174.99 175.10 175.02 174.96 174.85 174.79 174.79 174.82 174.52 175.10 0.58
2014 174.68 174.61 174.79 174.96 175.13 175.21 175.26 175.27 175.26 175.18 175.10 175.13 175.05 174.61 175.27 0.66
2015 174.95 174.74 174.94 175.17 175.22 175.44 175.56 175.48 175.42 175.26 175.12 175.12 175.20 174.74 175.56 0.82
2016 175.18 175.17 175.32 175.49 175.50 175.51 175.49 175.46 175.41 175.32 175.19 175.12 175.35 175.12 175.51 0.39
2017 175.19 175.22 175.29 175.47 175.61 175.64 175.70 175.66 175.58 175.46 175.44 175.36 175.47 175.19 175.70 0.51
2018 175.24 175.32 175.51 175.60 175.68 175.72 175.71 175.64 175.62 175.52 175.50 175.47 175.54 175.24 175.72 0.48
2019 175.41 175.41 175.56 175.70 175.89 175.99 176.04 175.96 175.86 175.77 175.71 175.68 175.75 175.41 176.04 0.63
2020 175.80 175.79 175.83 175.91 175.98 176.02 176.03 175.97 175.88 175.74 175.65 175.63 175.85 175.63 176.03 0.40
2021 175.62 175.47 175.54 175.54 175.57 175.62 175.73 175.71 175.64 175.61 175.48 175.42 175.58 175.42 175.73 0.31
2022 175.32 175.07 175.32 175.40 175.50 175.55 175.53 175.50 175.41 175.25 175.14 175.12 175.34 175.07 175.55 0.48
2023 175.14 175.17 175.30 175.42 175.45 175.46 175.50 175.52 175.44 175.28 175.17 175.13 175.33 175.13 175.52 0.39
2024 175.26 175.21 175.20 175.32 175.41 175.46 175.53 175.48 175.36 175.20 175.04 174.96 175.29 174.96 175.53 0.57

All-time

Average 174.88 174.82 174.94 175.08 175.16 175.21 175.23 175.19 175.12 175.03 174.94 174.94 175.05 174.73 175.24 0.51
Minimum 173.88 173.89 174.05 174.32 174.42 174.45 174.50 174.41 174.34 174.27 174.18 174.24 174.27 173.88 174.50 0.16
Maximum 175.80 175.80 175.83 175.91 175.98 176.02 176.04 175.97 175.88 175.96 175.82 175.80 175.85 175.80 176.04 1.01

2015-2024

Average 175.31 175.26 175.38 175.50 175.58 175.64 175.68 175.64 175.56 175.44 175.34 175.30

Water levels in metres referred to Chart Datum

2024 0.86 0.81 0.80 0.92 1.01 1.06 1.13 1.08 0.96 0.80 0.64 0.56
All-Time
Average 0.48 0.42 0.54 0.68 0.76 0.81 0.83 0.79 0.72 0.63 0.54 0.54
Minimum -0.52 -0.51 -0.35 -0.08 0.02 0.05 0.10 0.01 -0.06 -0.13 -0.22 -0.16
Maximum 1.40 1.40 1.43 1.51 1.58 1.62 1.64 1.57 1.48 1.56 1.42 1.40
Date modified: