Lake GranbyWater Level & Temperature
Lake Granby water level & water temperature
Lake Granby water level is updated continuously from the operating agency. Full pool elevation is 8280 ft. Live reading, 7-day trend, and multi-year history appear below as the data loads.
Lake Granby water temperature by month
Lake Granby surface water temperature averages from about 34°F in February to 65°F in July over the year, based on a 40-year USGS model (1980–2020). Cold-water caution applies in roughly half the year, when the typical temperature is below 60°F.
Jan
35°
Feb
34°
Mar
34°
Apr
36°
May
45°
Jun
56°
Jul
65°
Aug
64°
Sep
60°
Oct
51°
Nov
43°
Dec
37°
Typical surface temperatures (°F), modeled historical averages (USGS 185k-lake dataset, 1980–2020). Colors flag cold-water risk: blue/amber/red = cool, caution, danger. Live and recent readings appear above where a sensor is available.