Ottawa River at Thurso

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
1991	41.66	41.65	41.65	41.90	41.43	41.26	41.22	41.20	41.21	41.25	41.29	41.44	41.43	42.44	41.14
1992	41.47	41.49	41.46	41.68	41.54	41.26	41.26	41.24	41.32	41.38	41.59	41.52	41.43	41.93	41.20
1993	41.56	41.48	41.38	41.74	41.33	41.36	41.23	41.22	41.22	41.39	41.48	41.46	41.40	42.05	41.16
1994	41.41	41.52	41.49	41.45	41.53	41.45	41.45	41.35	41.25	41.23	41.32	41.36	41.40	41.85	41.04
1995	41.67	41.81	41.72	41.30	41.48	41.46	41.21	41.20	41.16	41.18	41.33	41.43	41.41	42.21	41.06
1996	41.56	41.64	41.54	41.54	41.74	41.40	41.31	41.27	41.22	41.24	41.29	41.34	41.42	42.20	41.13
1997	41.45	41.58	41.64	41.66	42.06	41.39	41.28	41.21	41.21	41.22	41.27	41.29	41.44	42.50	41.11
1998	41.38	41.40	41.50	41.90	41.26	41.22	41.22	41.17	41.16	41.16	41.16	41.23	41.31	42.74	41.05
1999	41.38	41.49	41.49	41.46	41.25	41.29	41.26	41.19	41.19	41.32	41.48	41.61	41.37	41.94	41.09
2000	41.49	41.48	41.30	41.47	41.57	41.35	41.29	41.27	41.23	41.19	41.23	41.23	41.34	41.87	40.81
2001	41.30	41.39	41.36	41.41	41.35	41.29	41.20	41.17	41.20	41.34	41.49	41.56	41.34	41.67	41.13
2002	41.59	41.49	41.53	41.63	41.78	41.64	41.27	41.15	41.14	41.16	41.16	41.17	41.39	42.16	41.04
2003	41.17	41.18	41.32	41.47	41.33	41.32	41.21	41.25	41.17	41.30	41.68	41.92	41.36	42.21	41.05
2004	41.87	41.67	41.65	41.65	41.84	41.44	41.30	41.13	41.15	41.12	41.10	41.15	41.42	42.17	40.96
2005	41.35	41.29	41.17	41.76	41.44	41.26	41.20	41.17	41.10	41.20	41.23	---	41.29	41.97	41.02
2006	41.63	41.73	41.67	41.76	41.53	41.32	41.28	41.27	41.24	41.40	41.68	41.69	41.52	42.09	41.20
2007	41.76	41.71	41.66	41.52	41.33	41.42	41.27	41.18	41.16	41.16	41.16	41.27	41.38	42.00	41.05
2008	41.62	41.69	41.69	42.20	41.75	41.48	41.54	41.50	41.30	41.25	41.32	41.48	41.57	42.57	41.12
2009	41.65	41.65	41.72	41.84	41.77	41.46	41.41	41.38	41.22	41.24	41.37	41.34	41.50	42.30	41.12
2010	41.39	41.44	41.46	41.28	41.21	41.20	41.17	41.16	41.24	41.35	41.37	41.74	41.33	42.01	40.93
2011	41.57	41.51	41.66	41.58	41.75	41.42	41.30	41.21	41.20	41.19	41.20	41.32	41.41	42.09	41.02
2012	41.42	41.47	41.66	41.46	41.37	41.24	41.19	41.17	41.18	41.26	41.37	41.44	41.35	41.89	41.09
2013	41.52	41.64	41.58	41.80	41.98	41.65	41.27	41.20	41.21	41.29	41.56	41.48	41.51	42.24	41.16
2014	41.56	41.56	41.35	41.82	41.98	41.46	41.27	41.25	41.31	41.45	41.45	41.48	41.50	42.22	41.19
2015	41.71	41.55	41.42	41.54	41.44	41.32	41.20	41.20	41.22	41.19	41.28	41.47	41.38	41.90	41.12
2016	41.94	42.06	42.07	41.99	41.62	41.35	41.21	41.19	41.18	41.18	41.20	41.31	41.52	42.63	41.00
2017	41.44	41.52	41.78	42.28	42.62	41.62	41.47	41.28	41.29	41.25	41.45	41.53	41.63	43.69	41.18
2018	41.69	41.66	41.50	41.39	41.89	41.43	41.24	41.21	41.32	41.40	41.43	41.46	41.47	42.31	41.09
2019	41.52	41.65	41.57	42.32	43.13	41.75	41.23	41.14	41.14	41.03	41.28	41.34	41.59	43.66	40.85
2020	41.44	41.42	41.63	41.83	41.48	41.33	41.21	41.25	41.29	41.39	41.44	41.49	41.43	42.22	41.14
2021	41.82	41.63	41.56	41.30	41.19	41.16	41.25	41.19	41.22	41.35	41.29	41.43	41.37	41.97	41.09
2022	41.47	41.45	41.64	41.75	41.74	41.74	41.26	41.22	---	41.25	41.23	41.38	41.46	42.11	41.11
2023	41.76	41.73	41.53	42.05	42.13	41.25	41.24	41.26	41.22	41.19	41.22	41.41	41.50	43.19	41.01
Mean - Moyenne	41.55	41.56	41.56	41.69	41.66	41.39	41.27	41.23	41.21	41.26	41.35	41.43	41.43	43.69 (max)	40.81 (min)
Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Means	Daily Maximum	Daily Minimum

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