Hopkinton Lake water level history
Daily records since 1996 · Level today: 382.22 ft
Highest on record
407.29 ft
Apr 18, 2007
Lowest on record
378.87 ft
Aug 16, 2020
Today
382.22 ft
Oct 21, 2026
Years of data
30
since 1996
In short
Across 29 complete years, 2001 had the lowest average level (381.90 ft) and 2018 the highest (383.55 ft).
On average the lake is lowest in August (380.59 ft) and highest in April (384.87 ft).
Hopkinton Lake level, all years
Loading chart…
Measured
Normal range for the date (middle 50% of past years)
Lowest years
Years ranked by their lowest daily level.
- 2020
- 2003
- 1999
- 2006
- 2002
Yearly highs and lows
| Year | Average | Low | Low date | High | High date |
|---|---|---|---|---|---|
| 2026 (292 days) | 381.38 | 380.01 | Jul 15 | 387.58 | May 15 |
| 2025 | 382.42 | 379.94 | Oct 12 | 398.05 | May 12 |
| 2024 | 382.45 | 379.91 | Jun 14 | 391.15 | Mar 11 |
| 2023 | 383.11 | 380.23 | Sep 24 | 396.55 | Jul 13 |
| 2022 | 381.97 | 379.67 | Oct 13 | 391.50 | Dec 25 |
| 2021 | 382.74 | 379.69 | Jun 20 | 392.54 | Jul 20 |
| 2020 | 382.39 | 378.87 | Aug 16 | 393.58 | Dec 27 |
| 2019 | 382.78 | 379.95 | Sep 27 | 389.47 | Apr 28 |
| 2018 | 383.55 | 379.95 | Sep 10 | 398.18 | Nov 10 |
| 2017 | 382.53 | 380.13 | Oct 23 | 393.62 | Nov 1 |
| 2016 | 381.97 | 379.97 | Sep 18 | 388.16 | Feb 26 |
| 2015 | 381.91 | 380.27 | Aug 10 | 387.18 | Apr 13 |
| 2014 | 382.62 | 380.34 | Oct 1 | 393.25 | Apr 2 |
| 2013 | 382.76 | 380.20 | Aug 16 | 387.18 | Jun 29 |
| 2012 | 382.38 | 379.93 | Oct 13 | 388.14 | Dec 23 |
| 2011 | 383.02 | 379.56 | Aug 14 | 399.33 | Mar 13 |
| 2010 | 382.90 | 379.15 | Sep 1 | 406.14 | Apr 1 |
| 2009 | 382.45 | 379.46 | Sep 19 | 388.97 | Apr 7 |
| 2008 | 382.30 | 379.52 | Aug 26 | 391.29 | Dec 14 |
| 2007 | 382.08 | 379.50 | Aug 15 | 407.29 | Apr 18 |
| 2006 | 383.36 | 379.04 | Oct 9 | 407.17 | May 17 |
| 2005 | 383.45 | 379.42 | Sep 3 | 406.16 | Oct 17 |
| 2004 | 382.24 | 379.30 | Aug 8 | 402.32 | Apr 4 |
| 2003 | 382.73 | 378.89 | Jul 15 | 404.41 | Mar 31 |
| 2002 | 381.97 | 379.08 | Sep 18 | 386.60 | Nov 24 |
| 2001 | 381.90 | 379.44 | Aug 6 | 399.52 | Apr 25 |
| 2000 | 382.14 | 379.74 | Sep 1 | 391.73 | Apr 24 |
| 1999 | 382.03 | 378.98 | Aug 28 | 389.57 | Sep 17 |
| 1998 | 382.93 | 379.72 | Aug 20 | 403.08 | Jun 19 |
| 1997 | 382.40 | 379.34 | Oct 14 | 398.35 | Apr 21 |
| 1996 (1 days) | 385.24 | 385.24 | Dec 31 | 385.24 | Dec 31 |
Levels in feet. Partial years show the number of days with data.
Monthly averages
| Month | Average | Lowest | Highest |
|---|---|---|---|
| January | 383.39 | 380.79 | 393.99 |
| February | 382.93 | 380.13 | 393.05 |
| March | 383.98 | 379.65 | 404.94 |
| April | 384.87 | 379.93 | 407.29 |
| May | 382.37 | 379.74 | 407.17 |
| June | 381.57 | 379.47 | 403.08 |
| July | 380.91 | 378.89 | 396.55 |
| August | 380.59 | 378.87 | 393.08 |
| September | 380.67 | 379.08 | 389.57 |
| October | 382.31 | 379.04 | 406.16 |
| November | 383.08 | 379.86 | 398.18 |
| December | 383.48 | 380.09 | 393.61 |
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Daily levels as CSV (10,852 rows; credit the original agencies listed below)