Island Lake

Best time to visit Island Lake

Best months: May–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

   22° / 3°

   5 wet

2. Feb

   26° / 5°

   5 wet

3. Mar

   38° / 18°

   5 wet

4. Apr

   53° / 32°

   7 wet

5. May

   67° / 46°

   10 wet

6. Jun

   76° / 58°

   11 wet

7. Jul

   82° / 62°

   9 wet

8. Aug

   81° / 60°

   8 wet

9. Sep

   72° / 51°

   8 wet

10. Oct

    57° / 37°

    7 wet

11. Nov

    40° / 23°

    4 wet

12. Dec

    27° / 10°

    5 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Roy Lake, SD, 7.3 mi away at 1,810 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.