Yellowstone Lake water temp
Throughout the year, the water temperature in Yellowstone Lake does not rise above 68°F and therefore is not suitable for comfortable swimming. The average water temperature in Yellowstone Lake in winter reaches 33.4°F, in spring 35.2°F, in summer the average temperature rises to 55°F, and in autumn it is 46.6°F.
Yellowstone Lake water temperature now
You may also be interested in other sections of our site for Yellowstone Lake: Sunrise and Sunset
Yellowstone Lake water temperature by month
These figures shows the average, minimum and maximum monthly water temperature in Yellowstone Lake. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years.
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 32.7°F | 32.4°F | 33.1°F | cold |
| February | cold | |||
| March | cold | |||
| April | 32.5°F | 32.2°F | 32.9°F | cold |
| May | 37.9°F | 33.6°F | 42.4°F | cold |
| June | 46.2°F | 39.9°F | 51.4°F | cold |
| July | 57.9°F | 48.2°F | 64.2°F | cold |
| August | 61°F | 58.5°F | 64.4°F | cold |
| September | 54.7°F | 49.3°F | 61.2°F | cold |
| October | 45.7°F | 41.2°F | 51.1°F | cold |
| November | 39.6°F | 35.1°F | 45.5°F | cold |
| December | 34°F | 32.7°F | 36.5°F | cold |
Chart monthly average water temperature in Yellowstone Lake
Current temperature and weather
Data in a table show Yellowstone Lake temperature today (September 28, 2025). For more information and forecast for a few days, go to the weather forecast Yellowstone Lake.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 51.3°F | 46.9°F | 44.6°F | 50.4°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | |  |  |
| 60.4°F | 63.9°F | 60.6°F | 51.8°F |
