Ottawa River at Gatineau (Hull)
| Monthly and Annual Mean Water Levels in Metres | Annual Extremes | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Means | Daily Maximum | Daily Minimum | |
| 1965 | 41.49 | 41.59 | 41.67 | 41.68 | 42.04 | 41.46 | 41.31 | 41.40 | 41.61 | 42.23 | 41.97 | 42.02 | 41.71 | 42.41 | 41.21 | |
| 1966 | 42.10 | 42.06 | 42.30 | 42.16 | --- | --- | 41.35 | 41.46 | 41.35 | 41.43 | 41.66 | 42.74 | 41.87 | 43.28 | 41.17 | |
| 1967 | 42.48 | 42.41 | 41.94 | 42.49 | 42.45 | 42.14 | 41.77 | 41.46 | 41.43 | 41.69 | 42.19 | 42.04 | 42.04 | 43.16 | 41.30 | |
| 1968 | 42.20 | 42.12 | 42.20 | 42.07 | 41.59 | 41.50 | 41.52 | 41.39 | 41.36 | 41.33 | 41.37 | 41.51 | 41.69 | 42.73 | 41.21 | |
| 1969 | 41.72 | 41.77 | 41.74 | 41.98 | 42.11 | 41.84 | 41.54 | 41.43 | 41.36 | 41.40 | 41.79 | 41.89 | 41.72 | 42.53 | 41.26 | |
| 1970 | 41.78 | 41.77 | 41.81 | --- | 42.06 | 41.92 | 41.84 | 41.62 | 41.42 | 41.48 | 41.55 | 41.70 | 41.74 | 42.35 | 41.29 | |
| 1971 | 41.71 | 41.79 | 41.95 | 42.20 | 42.30 | 41.57 | 41.33 | 41.31 | 41.29 | --- | --- | --- | --- | 43.11 | 41.09 | |
| 1972 | 41.57 | 41.57 | 41.68 | 42.10 | 42.86 | 41.96 | 41.85 | 41.71 | 41.61 | 41.58 | 41.91 | 42.02 | 41.87 | 43.49 | 41.39 | |
| 1973 | 42.04 | 42.21 | 42.82 | 42.77 | 42.65 | 42.13 | 41.83 | 41.53 | 41.45 | 41.58 | 41.54 | 41.88 | 42.04 | 43.94 | 41.20 | |
| 1974 | 41.83 | 41.82 | 42.27 | --- | 43.90 | 42.92 | 41.75 | 41.41 | 41.36 | 41.56 | 41.79 | 41.96 | 42.09 | 44.91 | 41.00 | |
| 1975 | 42.09 | 42.04 | 42.07 | 42.10 | 42.11 | 41.75 | 41.35 | 41.36 | 41.34 | 41.43 | 41.46 | 41.74 | 41.74 | 43.02 | 41.00 | |
| 1976 | 41.68 | 41.92 | --- | 43.23 | --- | 41.74 | 41.56 | 41.51 | 41.52 | 41.50 | 41.42 | 41.77 | --- | 44.74 | 41.08 | |
| 1977 | 41.75 | 41.72 | 42.29 | 42.34 | --- | 41.38 | 41.41 | 41.36 | --- | 41.36 | 41.55 | 42.05 | 41.71 | 43.43 | 41.12 | |
| 1978 | 42.13 | 42.19 | 41.85 | 42.24 | 42.08 | 41.54 | 41.36 | 41.31 | 41.27 | 41.41 | 41.35 | --- | 41.69 | 42.60 | 41.21 | |
| 1979 | 41.67 | 41.68 | 42.12 | 42.51 | 43.21 | 41.82 | 41.50 | 41.43 | 41.38 | 41.65 | 41.93 | 42.35 | 41.95 | 44.12 | 41.29 | |
| 1980 | 42.27 | 42.05 | 42.21 | 42.40 | 42.07 | 41.46 | 41.45 | 41.44 | 41.36 | 41.69 | 41.58 | 41.93 | 41.82 | 43.36 | 41.03 | |
| 1981 | 41.98 | 42.53 | 42.26 | 42.74 | 42.15 | 42.04 | 41.50 | 41.37 | 41.54 | 41.60 | 41.67 | 41.58 | 41.91 | 44.25 | 41.03 | |
| 1982 | 41.61 | 41.67 | 41.82 | 42.15 | 41.79 | 41.46 | 41.34 | 41.27 | 41.28 | 41.34 | 41.50 | 41.98 | 41.60 | 42.52 | 41.19 | |
| 1983 | 42.34 | 42.25 | 42.14 | 42.06 | 42.96 | 42.22 | 41.40 | 41.33 | 41.27 | 41.33 | 41.44 | 41.74 | 41.87 | 44.00 | 40.91 | |
| 1984 | 41.78 | 42.02 | 42.05 | 42.65 | 42.04 | 42.01 | 41.69 | 41.44 | 41.39 | 41.37 | 41.63 | 41.89 | 41.83 | 43.12 | 41.25 | |
| 1985 | 42.27 | 42.28 | 42.41 | 42.34 | 42.54 | 41.51 | 41.45 | 41.57 | 41.35 | 41.34 | 41.41 | 41.60 | 41.84 | 43.53 | 41.22 | |
| 1986 | 41.69 | 41.77 | 41.70 | 42.20 | 42.05 | 41.74 | 41.42 | 41.41 | 41.41 | 41.57 | 41.58 | 41.71 | 41.69 | 42.74 | 41.28 | |
| 1987 | 41.76 | 41.72 | 41.75 | 42.11 | 41.35 | 41.35 | 41.29 | 41.26 | 41.24 | 41.26 | 41.36 | 41.59 | 41.50 | 42.57 | 41.16 | |
| 1988 | 41.84 | 41.91 | 41.64 | 42.28 | 42.04 | 41.38 | 41.28 | 41.38 | 41.41 | 41.83 | 42.34 | 42.07 | 41.78 | 42.60 | 41.24 | |
| 1989 | 42.09 | 42.14 | 41.93 | 42.06 | 42.18 | 42.06 | 41.39 | 41.26 | 41.28 | 41.27 | 41.53 | 41.83 | 41.75 | 42.86 | 41.14 | |
| 1990 | 41.99 | 42.06 | 42.10 | 42.13 | 41.96 | 41.52 | 41.47 | 41.33 | 41.30 | 41.61 | 41.75 | 42.33 | 41.79 | 42.65 | 41.23 | |
| 1991 | 42.27 | 42.29 | 42.15 | 42.82 | 41.92 | 41.40 | 41.28 | 41.24 | 41.26 | 41.34 | 41.45 | 41.82 | 41.77 | 43.47 | 41.19 | |
| 1992 | 41.86 | 42.01 | 41.94 | 42.22 | 42.24 | 41.55 | 41.51 | 41.36 | 41.49 | 41.62 | 42.05 | 41.97 | 41.82 | 42.95 | 41.22 | |
| 1993 | 42.15 | 42.13 | 41.84 | 42.38 | 41.55 | 41.63 | 41.35 | 41.28 | 41.29 | 41.52 | 41.82 | 41.86 | 41.73 | 42.79 | 41.21 | |
| 1994 | 41.87 | 42.13 | 42.07 | 41.91 | 41.92 | 41.78 | 41.77 | 41.56 | 41.36 | 41.34 | 41.52 | 41.65 | 41.74 | 42.49 | 41.27 | |
| 1995 | 42.23 | 42.39 | 42.22 | 41.54 | 41.91 | 41.86 | 41.34 | 41.31 | 41.23 | 41.21 | 41.61 | 41.93 | 41.73 | 42.90 | 41.20 | |
| 1996 | 42.05 | 42.24 | 42.03 | 42.09 | 42.87 | 41.81 | 41.59 | 41.47 | 41.37 | 41.33 | 41.37 | 41.52 | 41.81 | 43.56 | 41.27 | |
| 1997 | 42.01 | 42.27 | 42.29 | 42.56 | 43.19 | 41.75 | 41.55 | 41.35 | 41.34 | 41.36 | 41.49 | 41.54 | 41.89 | 43.79 | 41.28 | |
| 1998 | 41.80 | 41.85 | 41.97 | 42.92 | 41.49 | 41.38 | 41.38 | 41.28 | 41.26 | 41.27 | 41.24 | 41.40 | 41.60 | 43.96 | 41.04 | |
| 1999 | 41.84 | 42.02 | 41.96 | 42.05 | 41.40 | 41.53 | 41.46 | 41.31 | 41.28 | 41.46 | 41.94 | 42.25 | 41.71 | 42.96 | 41.23 | |
| 2000 | 42.16 | 42.13 | 41.80 | 41.87 | 42.02 | 41.65 | 41.53 | 41.47 | 41.38 | 41.29 | 41.37 | 41.53 | 41.68 | 42.60 | 41.21 | |
| 2001 | 41.68 | 41.86 | 41.81 | 41.96 | 41.63 | 41.49 | 41.30 | 41.24 | 41.27 | 41.68 | 42.01 | 42.15 | 41.67 | 42.27 | 41.19 | |
| 2002 | 42.25 | 42.21 | 42.04 | 42.53 | 42.62 | 42.41 | 41.59 | 41.28 | 41.19 | 41.23 | 41.25 | 41.32 | 41.82 | 43.48 | 41.13 | |
| 2003 | 41.45 | 41.54 | 41.70 | 41.85 | 41.60 | 41.55 | 41.35 | 41.46 | 41.29 | 41.55 | 42.31 | 42.70 | 41.70 | 43.10 | 41.22 | |
| 2004 | 42.69 | 42.42 | 42.24 | 42.26 | 42.53 | 41.67 | 41.66 | 41.29 | 41.31 | 41.23 | 41.22 | 41.46 | 41.83 | 43.03 | 41.04 | |
| 2005 | 41.90 | 41.85 | 41.60 | 42.61 | 41.89 | 41.49 | 41.35 | 41.24 | 41.16 | 41.29 | 41.45 | --- | 41.63 | 42.93 | 41.07 | |
| 2006 | 42.18 | 42.32 | 42.25 | 42.67 | 41.94 | 41.55 | 41.44 | 41.41 | 41.34 | 41.90 | 42.35 | 42.41 | 41.98 | 42.95 | 41.24 | |
| 2007 | 42.56 | 42.46 | 42.26 | 42.02 | 41.59 | 41.77 | 41.48 | 41.27 | 41.23 | 41.22 | 41.21 | 41.48 | 41.71 | 42.95 | 41.12 | |
| 2008 | 42.29 | 42.38 | 42.33 | 43.06 | 42.46 | 41.90 | 41.98 | 41.85 | 41.51 | 41.41 | 41.55 | 41.98 | 42.06 | 43.64 | 41.26 | |
| 2009 | 42.35 | 42.40 | 42.31 | 42.73 | 42.55 | 41.91 | 41.70 | 41.66 | 41.36 | 41.42 | 41.69 | 41.76 | 41.98 | 43.32 | 41.22 | |
| 2010 | 41.88 | 41.97 | 41.86 | 41.49 | 41.29 | 41.26 | 41.22 | 41.21 | 41.34 | 41.61 | 41.63 | 42.40 | 41.60 | 42.84 | 40.97 | |
| 2011 | 42.24 | 42.15 | 42.25 | 42.25 | 42.53 | 41.80 | 41.50 | 41.30 | 41.28 | 41.29 | 41.36 | 41.61 | 41.80 | 43.18 | 41.16 | |
| 2012 | 41.93 | 41.99 | 42.35 | 41.88 | 41.57 | 41.33 | 41.22 | 41.22 | 41.23 | 41.41 | 41.74 | 41.82 | 41.64 | 42.94 | 41.14 | |
| 2013 | 42.09 | 42.30 | 42.16 | 42.54 | 43.04 | 42.31 | 41.44 | 41.31 | 41.31 | 41.47 | 42.03 | 41.94 | 41.99 | 43.44 | 41.24 | |
| 2014 | 42.10 | 42.16 | 41.76 | 42.52 | 43.04 | 41.85 | 41.44 | 41.37 | 41.51 | 41.89 | 41.94 | 41.96 | 41.96 | 43.43 | 41.29 | |
| 2015 | 42.54 | 42.51 | 42.06 | 42.12 | 41.86 | 41.58 | 41.30 | 41.30 | 41.32 | 41.27 | 41.46 | 41.89 | 41.76 | 42.83 | 41.18 | |
| 2016 | 42.80 | 42.72 | 42.89 | 42.98 | 42.26 | 41.64 | 41.33 | 41.30 | 41.28 | 41.29 | 41.30 | 41.56 | 41.94 | 43.56 | 41.01 | |
| 2017 | 41.89 | 42.04 | 42.54 | 43.31 | 43.86 | 42.26 | 41.90 | 41.50 | 41.52 | 41.43 | 41.81 | 42.14 | 42.18 | 45.20 | 41.35 | |
| 2018 | 42.37 | 42.32 | 41.92 | 41.77 | 42.81 | 41.84 | 41.36 | 41.36 | 41.57 | 41.81 | 41.86 | 41.93 | 41.91 | 43.53 | 41.24 | |
| 2019 | 42.13 | 42.42 | 42.20 | 43.19 | 44.59 | 42.60 | 41.46 | 41.23 | 41.23 | 41.16 | 41.58 | 41.66 | 42.12 | 45.17 | 40.94 | |
| 2020 | 41.99 | 42.01 | 42.16 | 42.79 | 42.05 | 41.69 | 41.39 | 41.45 | 41.52 | 41.73 | 41.88 | 41.94 | 41.88 | 43.28 | 41.29 | |
| 2021 | 42.41 | 42.27 | 42.15 | 41.63 | 41.36 | 41.24 | 41.42 | 41.31 | 41.36 | 41.64 | 41.51 | 41.76 | 41.67 | 42.58 | 41.17 | |
| Mean - Moyenne | 41.96 | 42.02 | 42.02 | 42.28 | 42.18 | 41.73 | 41.49 | 41.39 | 41.35 | 41.47 | 41.65 | 41.88 | 41.78 | 43.17 | 41.18 | |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Means | Daily Maximum | Daily Minimum | |