⚠ Climbing above 4,800′ requires a permit Apr 1–Oct 31 ($15, capped at 100/day). Reserve at purchasepass.com — they sell out for weekends weeks in advance.
🏖️ Out of season — typical corn window for this route is Feb–Jun. The score is shown for reference only.
🧠 Decision support, not a verdict. This score is a model — verify it against NWAC, the UW forecast, and your own read of the conditions before you commit to a tour. How it works →

Monday, Jul 27

12 /100
Corn Score

❄️ Poor corn conditions on the model's read. Overnight: 50°F at Climbers Bivouac (⚠️ didn't freeze). Crater Rim overnight low: forecast 46°F. Daytime high: 63°F at Climbers Bivouac.

🌙 50°F overnight low ☀️ 63°F daytime high 💨 9 mph wind ❄️ 0" new snow 🔄 0 streak
Confidence 100%
0–44 poor · 45–69 marginal · 70–100 good · methodology

How this score was built

  • Refreeze (× 0.5) +0.0
  • Warming (× 0.3) +12.3
  • Streak bonus (capped at 20) +0
  • Final score 12.3 / 100

Why this score?

  • Refreeze 0/100 contributed +0 pts (50% weight). Snow surface ≈ air (50°F) — sky 51% cloud, wind ×0.79, humidity ×0.00: clouds, wind, or humid air suppressed radiative cooling.
  • Warming 41/100 contributed +12 pts (30% weight).
  • Freeze/thaw streak is 0 days — base score (refreeze + warming) caps at 80 until a streak builds.

Condition Components

🥶 Refreeze

0/100

Air low: 50°F → surface ~50°F, Cloud: 51%, Wind: 3 mph, Dew: 53°F

☀️ Warming

41/100

High: 63°F (mush risk)

🔄 Streak

0 days

Consecutive freeze/thaw days

💨 Wind

9 mph

Max wind (mph) at Crater Rim

7-Day Outlook

Mon
Jul 27
12/100
Lo: 50°
Hi: 63°
Day: Sunny Night: Mostly Cloudy 39% cl · 2 mph · dew 54°
high conf
tap for details
Tue
Jul 28
12/100
Lo: 53°
Hi: 63°
Day: Mostly Sunny Night: Mostly Clear 9% cl · 2 mph · dew 53°
high conf
tap for details
Wed
Jul 29
6/100
Lo: 51°
Hi: 67°
Day: Sunny Night: Partly Cloudy 37% cl · 3 mph · dew 56°
med conf
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Thu
Jul 30
4/100
Lo: 51°
Hi: 68°
Day: Sunny Night: Mostly Clear 8% cl · 3 mph · dew 50°
med conf
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Fri
Jul 31
0/100
Lo: 54°
Hi: 73°
Day: Sunny Night: Mostly Clear 17% cl · 3 mph · dew 49°
med conf
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Sat
Aug 1
8/100
Lo: 55°
Hi: 66°
Day: Sunny Night: Mostly Clear 4% cl · 3 mph · dew 52°
med conf
tap for details
Sun
Aug 2
14/100
Lo: 49°
Hi: 62°
Day: Sunny Night: Mostly Clear 23% cl · 8 mph · dew 53°
med conf
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Freeze/Thaw History

Recent Snowfall

Day New Snow
Climbers Bivouac 3,440′
Est. Crater Rim
~8,300′
Source
confidence
SWE Δ
in / 24h
Precip
in / 24h
Depth Low / High
Mon Jul 27 none high 0" 50° / 63°
Sun Jul 26 none high 0" 51° / 63°
Sat Jul 25 none high 0.3 0" 50° / 56°
Fri Jul 24 none high 0" 54° / 73°
Thu Jul 23 none high 0.4 0" 56° / 65°
Wed Jul 22 none high 0.2 0" 61° / 87°
Tue Jul 21 none high 0" 67° / 83°
Mon Jul 20 none high 0" 60° / 74°
Sun Jul 19 none high +0.00 0" 50° / 71°
Sat Jul 18 none high +0.00 0" 48° / 65°
Fri Jul 17 none high +0.00 0" 47° / 62°
Thu Jul 16 none high -0.10 0.8 0" 50° / 63°
Wed Jul 15 1.0" ~1.5" SWE-implied medium +0.10 0" 58° / 74°
Tue Jul 14 none high +0.00 0" 57° / 74°
Mon Jul 13 low 0" 58° / 72°

St. Helens Webcams view gallery →

Latest Observation

Air Temp 62.8°F
Snow Depth None"
SWE None"
Time 2026-07-27T10:00

Forecasts View archive →

No NWAC forecast data yet.

No UW forecast data yet.

Data Collection

webcam 5 rec 18:35
webcam 5 rec 18:30
webcam 6 rec 18:25
webcam 5 rec 18:20
snotel_june_lake 2 rec 18:18
snotel_wells_creek 2 rec 18:18
snotel_mt_hood_test 4 rec 18:18
nwac_obs 0 rec 18:18