Site 21

Best time to visit Site 21

Best months: May–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

   39° / 21°

   8 wet · 5 snow

2. Feb

   44° / 24°

   8 wet · 5 snow

3. Mar

   54° / 32°

   9 wet · 4 snow

4. Apr

   61° / 37°

   9 wet · 2 snow

5. May

   71° / 46°

   9 wet

6. Jun

   82° / 55°

   6 wet

7. Jul

   91° / 64°

   5 wet

8. Aug

   90° / 63°

   6 wet

9. Sep

   79° / 52°

   6 wet

10. Oct

    64° / 40°

    6 wet · 1 snow

11. Nov

    49° / 29°

    7 wet · 3 snow

12. Dec

    39° / 21°

    8 wet · 6 snow

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Tooele, UT, 5.4 mi away at 4,944 ft. The station sits about 1,200 ft lower than this place, so expect it a little cooler here. Source: NOAA NCEI U.S. Climate Normals 1991–2020.