Climbing Forecast › Joshua Tree › Jumbo Rocks

JOSHUA TREE · QUARTZ MONZONITE

Jumbo Rocks climbing conditions

Good — dry and climbable

Right now

Temp91°F
Wind10 mph
Gusts15 mph
Humidity19.7%
Rain 48hdry
Last rainNone recent

Assessment

No recent rain
Hot — quartz-monzonite slabs may feel greasy

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Wednesday 26 August
Good
Temp82°F
Raindry
Wind7 mph
Gusts15 mph
Humidity28%
No recent rain
  • Quartz monzonite gives bombproof friction when dry — coarse grain shreds fingertips, bring tape
Time °F Rain Wind (mph) Gust Hum
06:00 83° dry 6 — 30.9%
07:00 83° dry 5 — 31.5%
08:00 82° dry 5 — 32.1%
09:00 82° dry 6 — 31.8%
10:00 81° dry 6 — 31.8%
11:00 80° dry 6 — 31.7%
12:00 79° dry 6 — 31.8%
13:00 78° dry 7 — 32.1%
14:00 80° dry 8 — 29.3%
15:00 87° dry 10 — 22.5%
16:00 89° dry 10 — 19.8%
17:00 92° dry 9 — 18.2%
18:00 94° dry 7 — 16.8%
19:00 96° dry 11 — 15.6%
20:00 98° dry 14 — 14.4%
21:00 99° dry 14 — 13.5%
Thu Thursday 27 August
Good
Temp82°F
Raindry
Wind6 mph
Gusts—
Humidity22%
No recent rain
  • Quartz monzonite gives bombproof friction when dry — coarse grain shreds fingertips, bring tape
Time °F Rain Wind (mph) Gust Hum
06:00 85° dry 7 — 25.9%
07:00 84° dry 5 — 25.2%
08:00 83° dry 6 — 24.8%
09:00 82° dry 5 — 25.5%
10:00 82° dry 4 — 25.3%
11:00 81° dry 4 — 24.7%
12:00 81° dry 4 — 24.6%
13:00 80° dry 5 — 24.4%
14:00 82° dry 6 — 22.8%
15:00 87° dry 7 — 18.5%
16:00 90° dry 7 — 16.8%
17:00 93° dry 6 — 15.3%
18:00 96° dry 9 — 13.8%
19:00 98° dry 11 — 13%
20:00 98° dry 14 — 13.8%
21:00 98° dry 14 — 14.5%
Fri Friday 28 August
Good
Temp84°F
Raindry
Wind3 mph
Gusts—
Humidity25%
No recent rain
  • Hot — coarse crystals still bite but the rock heats up fast in the desert sun
  • Quartz monzonite gives bombproof friction when dry — coarse grain shreds fingertips, bring tape
Time °F Rain Wind (mph) Gust Hum
06:00 85° dry 6 — 24.4%
07:00 83° dry 4 — 26%
08:00 83° dry 4 — 26.1%
09:00 83° dry 2 — 26.5%
10:00 83° dry 4 — 26.6%
11:00 82° dry 4 — 28%
12:00 82° dry 2 — 27.4%
13:00 81° dry 2 — 27.8%
14:00 82° dry 3 — 27.4%
15:00 88° dry 3 — 21.3%
16:00 91° dry 4 — 19.7%
17:00 94° dry 7 — 18.6%
18:00 95° dry 9 — 17.3%
Sat Saturday 29 August
Good
Temp79°F
Raindry
Wind2 mph
Gusts—
Humidity29%
No recent rain
  • Quartz monzonite gives bombproof friction when dry — coarse grain shreds fingertips, bring tape
Time °F Rain Wind (mph) Gust Hum
06:00 84° dry 4 — 25.7%
12:00 79° dry 2 — 29.1%
18:00 93° dry 4 — 16.2%
Sun Sunday 30 August
Good
Temp73°F
Raindry
Wind2 mph
Gusts—
Humidity39%
No recent rain
  • Quartz monzonite gives bombproof friction when dry — coarse grain shreds fingertips, bring tape
Time °F Rain Wind (mph) Gust Hum
06:00 81° dry 5 — 30%
12:00 73° dry 2 — 38.7%
18:00 87° dry 4 — 21.6%
Mon Monday 31 August
Good
Temp70°F
Raindry
Wind4 mph
Gusts—
Humidity16%
No recent rain
  • Quartz monzonite gives bombproof friction when dry — coarse grain shreds fingertips, bring tape
Time °F Rain Wind (mph) Gust Hum
06:00 75° dry 9 — 17.4%
12:00 69° dry 4 — 16.1%
18:00 85° dry 1 — 9.1%
Tue Tuesday 1 September
Good
Temp68°F
Raindry
Wind6 mph
Gusts—
Humidity22%
No recent rain
  • Quartz monzonite gives bombproof friction when dry — coarse grain shreds fingertips, bring tape
Time °F Rain Wind (mph) Gust Hum
06:00 73° dry 11 — 24.8%
12:00 68° dry 6 — 22.1%
18:00 83° dry 9 — 8.9%
Wed Wednesday 2 September
Good
Temp68°F
Raindry
Wind1 mph
Gusts—
Humidity19%
No recent rain
  • Quartz monzonite gives bombproof friction when dry — coarse grain shreds fingertips, bring tape
Time °F Rain Wind (mph) Gust Hum
06:00 74° dry 1 — 21.6%
12:00 68° dry 1 — 19.4%
18:00 83° dry 1 — 7.3%

About Jumbo Rocks

Jumbo Rocks is JTree's eastern climbing hub — a spectacular jumble of house-sized quartz-monzonite blocks around the Jumbo Rocks Campground and the tourist-famous Skull Rock formation. Rock here is 'notoriously rough, even by Joshua Tree standards' per Mountain Project, though smoother exceptions exist in Conan's Corridor and Zebra Cliffs. Colorado Crack (5.9) is the flagship trad classic; Gem (5.8) and Right Crack (5.8) round out the moderate list. The area encompasses climbing within the campground and across the road, extending southeast to Zebra Cliffs. No water at the campground.

Region
Joshua Tree
Rock type
Quartz monzonite
Aspect
mixed-facing
Altitude
4400 ft
Exposure
medium
Seepage
very-low

Other crags in this region

Cap RockEcho Rock / Echo CoveHidden Valley CampgroundIndian CoveLost Horse WallQuail Springs (Trashcan Rock)Real Hidden ValleyRyan Campground (Headstone Rock)Sheep PassSplit RocksWonderland of Rocks