Fort Peck Lake water temp
The swimming season in Fort Peck Lake lasts from July to August. During those months, Fort Peck Lake water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Fort Peck Lake in winter reaches 35.2°F, in spring 42.1°F, in summer the average temperature rises to 68.7°F, and in autumn it is 54.9°F.
Fort Peck Lake water temperature now
You may also be interested in other sections of our site for Fort Peck Lake: Sunrise and Sunset
Fort Peck Lake water temperature by month
These figures shows the average, minimum and maximum monthly water temperature in Fort Peck 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 | 34°F | 32.5°F | 36.9°F | cold |
| February | 34.2°F | 32.2°F | 36.3°F | cold |
| March | 35.2°F | 32.4°F | 39°F | cold |
| April | 39.6°F | 34.3°F | 45.5°F | cold |
| May | 51.4°F | 43.7°F | 58.8°F | cold |
| June | 62.8°F | 57.6°F | 67.8°F | cold |
| July | 71.1°F | 66.7°F | 75.6°F | warm |
| August | 72.1°F | 68.4°F | 77.2°F | warm |
| September | 64.9°F | 58.6°F | 70.9°F | cold |
| October | 54°F | 48.9°F | 60.6°F | cold |
| November | 45.7°F | 39°F | 53.1°F | cold |
| December | 37.8°F | 32.4°F | 42.6°F | cold |
Chart monthly average water temperature in Fort Peck Lake
Current temperature and weather
Data in a table show Fort Peck Lake temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Fort Peck Lake.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | |  |  |
| 52.9°F | 47.7°F | 46°F | 54.3°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | | |
| 60.3°F | 64°F | 63.1°F | 57.6°F |
