Arizona · Rock climbing · Phoenix

Warm Up Boulder

5 routes
V0- – V0+
Bouldering
Nov–Apr
best months

Warm Up Boulder is a bouldering area in Arizona, set within the Union Hills on city land. It sits among a cluster of climbing spots, with Beardsley Roped Routes, Beardsley Bouldering and Sunshine Boulder all about 0.1 mile away. The climbing here is all bouldering, with five routes listed, all rated V0- or V0+ on the V scale. The routes are numbered #20 through #24, and the easiest of them sit at V0-. Spring and fall are the most comfortable times to visit. Typical averages from a nearby weather station show March highs around 75°F and November highs around 74°F, while June and July average highs near 100°F and 104°F. For a change from the rocks, the Great Horned Owl Trail is about 3.7 miles away, and the Union Peak Trail is about 4 miles away.

  • Best time to go · Nov–Apr

    Best time to visit Warm Up Boulder

    Best months: November–April. 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

      65° / 44°

      4 wet

    2. Feb

      68° / 46°

      4 wet

    3. Mar

      75° / 51°

      3 wet

    4. Apr

      82° / 57°

      2 wet

    5. May

      91° / 65°

      1 wet

    6. Jun

      101° / 73°

      1 wet

    7. Jul

      104° / 81°

      3 wet

    8. Aug

      103° / 81°

      4 wet

    9. Sep

      98° / 75°

      3 wet

    10. Oct

      86° / 63°

      3 wet

    11. Nov

      74° / 51°

      3 wet

    12. Dec

      64° / 43°

      4 wet

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Phoenix Deer Valley Muni Ap, AZ, 2.3 mi away at 1,455 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Routes (5)

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