GREAT LAKES WATER LEVELS

Monthly mean water levelMonthly mean water level in metres referred to chart datum.

Lakes

 

Superior

Huron

St.Clair

Erie

Ontario

2009

January

-0.06 0.01 0.55 0.55 0.56
 

February

-0.10

0.01 0.55 0.57 0.62
 

March

-0.12

0.09 0.66 0.82 0.72
 

April

-0.07

0.20 0.74 0.92 0.92
 

May

0.05

0.34 0.80 0.96 0.99
 

June

0.10

0.41 0.85 0.95 0.96
 

July

0.14 0.44 0.84 0.92 0.92
 

August

0.19 0.44 0.80 0.85 0.83
 

September

0.21 0.37 0.73 0.74 0.58

October

0.16 0.29 0.59 0.63 0.40
 

November

0.15 0.27 0.53 0.57 0.30
 

December

0.10 0.22 0.47 0.52 0.28

2010

January

0.01 0.15 0.34 0.49 0.31

February

-0.06

0.11 0.04 0.42 0.34

March

-0.11 0.09 0.36 0.47 0.35

April

-0.12 0.11 0.49 0.59 0.46

May

-0.12 0.13 0.58 0.71 0.51

June

-0.07 0.20 0.67 0.82 0.65

July

-0.01 0.26 0.68 0.77 0.77

August

0.0 0.24 0.65 0.69 0.70

September

0.02 0.16 0.52 0.52 0.52

October

-0.01 0.07 0.45 0.47 0.41

November

-0.06 -0.04 0.32 0.38 0.30

December

-0.13 -0.14 0.31 0.36 0.32

2011

January

-0.08 -0.19 0.08 0.33 0.29

February

-0.27 -0.22 0.10 0.25 0.21

March

-0.33 -0.19 0.27 0.53 0.41

April

-0.29 -0.09 0.49 0.70 0.65

May

-0.16 0.1 0.75 0.96 1.03
June -0.05 0.21 0.82 1.08 1.13
July 0.05 0.26 0.81 0.98 0.94
August 0.08 0.24 0.76 0.88 0.74
September 0.03 0.13 0.24 0.80 0.56
October 0.01 0.08 0.62 0.77 0.46

November

-0.04 0.07 0.55 0.71 0.38

December

-0.11 0.04 0.08 0.90 0.42

2012

January

-0.19 -0.01 0.62 0.88 0.60

February

-0.26 -0.04 0.59 0.87 0.79

March

-0.27 0.00 0.55 0.86 0.77

April

-0.2 0.03 0.59 0.81 0.72

May

-0.14 0.05 0.58 0.77 0.71
June 0.00 0.07 0.58 0.72 0.70
July 0.10 0.04 0.54 0.64 0.59
August 0.07 -0.03 0.45 0.54 -0.34
September 0.00 -0.14 0.35 0.45 0.30
October -0.07 -0.26 0.21 0.33 0.14
November -0.09 -0.33 0.19 0.35 0.09
December -0.14 -0.39 0.14 0.32 0.08

2013

January -0.21 -0.43 0.12 0.32 0.18
February -0.24 -0.39 0.14 0.36 0.32
March -0.29 -0.37 0.24 0.42 0.38
April -0.28 -0.25 0.36 0.52 0.52
May -0.09 -0.07 0.44 0.60 0.68
June 0.06 0.05 0.59 0.73 0.90
July 0.17 0.09 0.85 0.94 0.66
August 0.24 0.08 0.62 0.78 0.79
September 0.28 0.04 0.56 0.66 0.59
October 0.25 0.01 0.45 0.57 0.42
November 0.20 -0.01 0.39 0.47 0.40
December 0.15 -0.03 0.39 0.44 0.33

2014

January 0.09 -0.04 0.29 0.50 0.44

Elevation of chart datum in metres referred to International Great Lakes Datum 1985

Lake

 

Superior

Huron

St.Clair

Erie

Ontario

Chart Datum IGLD 1985 183.2 176.0 174.4 173.5 74.2