Climbing Forecast › Boulder Canyon › Castle Rock (Boulder Canyon)

BOULDER CANYON · GRANITE

Castle Rock (Boulder Canyon) weather & climbing conditions

Good — dry and climbable

Right now

Temp49°F
Wind9 mph
Gusts13 mph
Humidity64.8%
Rain 48h0.01 in
Last rainNone recent

Assessment

No recent rain
Good friction temperature range for granite

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Saturday 10 October
Good
Temp32°F
Raindry
Wind9 mph
Gusts13 mph
Humidity65%
No recent rain
Time °F Rain Wind (mph) Gust Hum
06:00 — dry — — null%
14:00 — dry — — null%
Sun Sunday 11 October
Good
Temp64°F
Raindry
Wind7 mph
Gusts—
Humidity39%
No recent rain
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 47° dry 7 — 72.5%
07:00 47° dry 7 — 72%
08:00 50° dry 7 — 65.5%
09:00 56° dry 5 — 56%
10:00 60° dry 5 — 47.3%
11:00 61° dry 5 — 44.6%
12:00 62° dry 9 — 41.5%
13:00 66° dry 9 — 35.4%
14:00 67° dry 9 — 33.8%
15:00 67° dry 7 — 35.5%
16:00 66° dry 7 — 36.9%
17:00 65° dry 8 — 37.4%
18:00 60° dry 5 — 56%
19:00 54° dry 7 — 64.2%
20:00 53° dry 9 — 66.2%
21:00 50° dry 8 — 72.6%
Mon Monday 12 October
Good
Temp64°F
Raindry
Wind11 mph
Gusts—
Humidity28%
No recent rain
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 49° dry 13 — 56.3%
07:00 48° dry 12 — 58.7%
08:00 50° dry 13 — 54.8%
09:00 54° dry 13 — 47.4%
10:00 57° dry 15 — 40.6%
11:00 61° dry 13 — 35%
12:00 64° dry 13 — 30%
13:00 66° dry 10 — 25.4%
14:00 69° dry 9 — 19.9%
15:00 68° dry 10 — 18.9%
16:00 65° dry 9 — 23.7%
17:00 62° dry 9 — 28.9%
18:00 57° dry 5 — 43%
19:00 53° dry 8 — 43.9%
20:00 51° dry 6 — 51.2%
21:00 52° dry 7 — 49.1%
Tue Tuesday 13 October
Poor
Temp55°F
Rain0.02 in
Wind8 mph
Gusts—
Humidity48%
0.4mm rain forecast
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 41° dry 3 — 75.5%
07:00 40° dry 4 — 77.4%
08:00 44° dry 3 — 73.8%
09:00 50° dry 4 — 58.8%
10:00 53° dry 6 — 52.5%
11:00 56° dry 8 — 47.1%
12:00 58° 0.01 in 9 — 43.3%
18:00 49° dry 1 — 91.5%
Wed Wednesday 14 October
Poor
Temp41°F
Rain0.08 in
Wind6 mph
Gusts—
Humidity100%
2.1mm rain forecastHumidity 100% — likely fog/cloud
Time °F Rain Wind (mph) Gust Hum
06:00 42° 0.04 in 4 — 99.9%
12:00 41° 0.02 in 5 — 99.8%
18:00 40° 0.02 in 4 — 99.8%
Thu Thursday 15 October
Poor
Temp39°F
Rain0.05 in
Wind6 mph
Gusts—
Humidity97%
1.3mm rain forecastHumidity 97% — likely fog/cloud
Time °F Rain Wind (mph) Gust Hum
06:00 32° dry 2 — 95%
12:00 40° 0.02 in 5 — 96.5%
18:00 39° 0.03 in 8 — 99.6%
Fri Friday 16 October
Poor
Temp41°F
Rain0.03 in
Wind3 mph
Gusts—
Humidity95%
0.7mm rain forecastHumidity 95% — likely fog/cloud
Time °F Rain Wind (mph) Gust Hum
06:00 38° 0.01 in 4 — 99.6%
12:00 41° dry 3 — 94.9%
18:00 42° dry 2 — 98.8%
Sat Saturday 17 October
Poor
Temp61°F
Rain0.01 in
Wind3 mph
Gusts—
Humidity37%
0.3mm rain forecast
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 36° dry 4 — 92.4%
12:00 61° dry 3 — 37.2%
18:00 50° 0.01 in 3 — 80.9%

About Castle Rock (Boulder Canyon)

North aspect and high altitude combine to make Castle Rock a summer refuge — routinely 5–10°C cooler than the canyon mouth, and often climbable when Denver is in the mid-30s. Own weather anchor (upper canyon is a genuinely distinct microclimate from the mid- and lower-canyon crags). Roadside pull-off on CO-119; USFS land, no fee.

Region
Boulder Canyon
Rock type
Granite
Aspect
north-facing
Altitude
6998 ft
Exposure
high
Seepage
low

Other crags in this region

Bell ButtressBlob RockCob RockElephant Buttresses (Boulder Canyon Mouth)The Dome (Boulder Canyon)