Downstream Area

Best time to visit Downstream Area

Best months: April–June and September–October. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.

1. Jan

   31° / 8°

2. Feb

   34° / 11°

3. Mar

   46° / 21°

4. Apr

   58° / 32°

5. May

   70° / 44°

6. Jun

   80° / 55°

7. Jul

   89° / 61°

8. Aug

   87° / 59°

9. Sep

   78° / 49°

10. Oct

    62° / 36°

11. Nov

    47° / 24°

12. Dec

    34° / 12°

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Oahe Dam, SD, 1.6 mi away at 1,663 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.