Coralville Lake Reservoir MET Station water level history

Daily records since 2011 · Level today: 686.22 ft

Highest on record

710.93 ft

Oct 18, 2018

Lowest on record

604.24 ft

Jan 26, 2012

Today

686.22 ft

Oct 22, 2026

Years of data

since 2011

In short

Across 14 complete years, 2012 had the lowest average level (682.15 ft) and 2019 the highest (687.34 ft).

On average the lake is lowest in April (682.11 ft) and highest in October (687.45 ft).

Loading chart…

Measured Normal range for the date (middle 50% of past years) Full pool

Years ranked by their lowest daily level.

Year	Average	Low	Low date	High	High date
2026 (292 days)	683.83	681.97	Mar 8	687.42	Sep 21
2025	684.29	682.93	Aug 31	688.62	Aug 11
2024	684.85	682.18	Jan 26	693.11	Jul 14
2023	683.40	682.19	Nov 29	685.59	May 9
2022	684.01	681.86	Apr 5	687.01	Nov 30
2021	684.11	682.84	Apr 13	686.62	Nov 18
2020	685.07	679.38	Apr 2	702.35	Jul 1
2019	687.34	679.13	Apr 23	704.65	Jun 5
2018	687.18	678.96	May 5	710.93	Oct 18
2017	683.29	678.97	Mar 19	686.74	Dec 5
2016	684.74	678.76	Mar 25	700.56	Oct 10
2015	685.27	679.00	Apr 14	699.02	Dec 29
2014	684.84	678.91	Apr 5	708.05	Jul 8
2013	686.96	679.15	Apr 14	708.40	Jun 5
2012	682.15	604.24	Jan 26	684.06	Dec 20
2011 (300 days)	684.91	679.01	Mar 14	692.86	Jun 17

Levels in feet. Partial years show the number of days with data.

Month	Average	Lowest	Highest
January	683.52	604.24	698.19
February	683.32	663.49	686.16
March	682.73	678.76	703.54
April	682.11	678.82	702.30
May	684.06	678.96	703.37
June	687.42	683.12	708.40
July	686.24	683.09	708.05
August	683.75	682.93	688.92
September	685.22	682.90	705.87
October	687.45	682.49	710.93
November	686.56	682.19	704.82
December	684.89	682.22	699.02

Daily levels as CSV (5,692 rows; credit the original agencies listed below)