Summit today
Is it safe to climb Gran Testa di By today?
Gran Testa di By today (updated 04:09, 18 Oct): up to -3°C at the summit, feeling as cold as -13°C, summit wind 34 mph gusting 60 mph, 73% chance of rain. A marginal day for the hills. Best day this week: Friday, summit gusts 30 mph.
Gran Testa di By weather today
Heavy snow showers, up to -3°C at the summit, feeling as cold as -13°C, summit wind 34 mph gusting 60 mph, 73% chance of rain. Rated Marginal.
Gran Testa di By weather tomorrow
Monday 19 October: slight snow showers, up to -2°C at the summit, feeling as cold as -11°C, summit wind 29 mph gusting 54 mph, 65% chance of rain. Rated Marginal.
Gran Testa di By weather this weekend
Sunday 18 October: heavy snow showers, up to -3°C at the summit, feeling as cold as -13°C, summit wind 34 mph gusting 60 mph, 73% chance of rain. Rated Marginal.
Gran Testa di By summit forecast, next 7 days
| Day | Verdict | High/low | Feels like | Wind/gust mph | Rain or snow |
|---|
| TodayA dusting of snow | Marginal | -3°/-5° | -13° | 34/60 | 73% |
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| TomorrowA dusting of snow | Marginal | -2°/-4° | -11° | 29/54 | 65% |
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| Tue 20Moderate snow | Marginal | -2°/-4° | -9° | 36/53 | 82% |
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| Wed 21Moderate snow | Marginal | -4°/-12° | -17° | 23/34 | 86% |
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| Thu 22Overcast | Marginal | -6°/-13° | -19° | 23/33 | 66% |
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| Fri 23Light snow | Marginal | -5°/-10° | -14° | 20/30 | 17% |
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| Sat 24A dusting of snow | Marginal | -9°/-14° | -20° | 20/33 | 36% |
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Gran Testa di By 14-day weather forecast: days 8 to 14, less certain
| Day | Verdict | High/low | Feels like | Wind/gust mph | Rain or snow |
|---|
| Sun 25A dusting of snow | Marginal | -13°/-27° | -31° | 22/39 | 54% |
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| Mon 26Mainly clear | Marginal | -9°/-27° | -30° | 24/43 | 46% |
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| Tue 27Overcast | Marginal | -4°/-12° | -16° | 14/39 | 18% |
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| Wed 28Mainly clear | Marginal | -3°/-11° | -15° | 6/33 | 10% |
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| Thu 29Overcast | Marginal | -2°/-11° | -14° | 6/13 | 17% |
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| Fri 30Overcast | Marginal | -2°/-9° | -13° | 15/15 | 18% |
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| Sat 31Clear sky | Marginal | -1°/-9° | -11° | 15/19 | 12% |
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Routes up
Routes coming soon
Cloud inversion · 7 days
The chance of standing above a sea of cloud on Gran Testa di By each morning this week, from overnight temperature, humidity and low cloud below the 3588m summit.
Dark sky · 7 days
How dark the sky gets over Gran Testa di By each night this week, from cloud cover, moonlight and local light pollution.
Snow · 7 days
Snow is forecast at the summit on 4 of the next 7 days, about 34.1 cm in all, most on Tuesday (16.5 cm). Lying snow up to 41 cm deep.
Sun today
Sunrise 07:51, sunset 18:40
10h 49m of daylight. Golden hour ends 08:32 and starts 17:58. From the summit you see the sun 07:41 to 18:50.
Nearby summits
Close to Gran Testa di By
About Gran Testa di By
Gran Testa di By is 3,588 m (11,772 ft) high with 67 m of prominence. It is in Alps, Switzerland. The nearest summits are Mont Sonadon (0.3 km), Pic d'Amiante (0.4 km) and Piccola Testa di By (0.8 km).
How high is Gran Testa di By?
Gran Testa di By is 3,588 metres high with 67 metres of prominence.
Where is Gran Testa di By?
Gran Testa di By is listed in Alps, Switzerland.
Are there routes for Gran Testa di By?
Route data is not available for this mountain yet, but the page still shows summit, weather, and location context.
Is it safe to climb Gran Testa di By today?
Peakify rates each day on the summit Good, Marginal or Poor from the forecast summit wind, gusts, chance of rain and wind chill. Wind of 40 mph or gusts of 65 mph make it Poor; wind of 25 mph, gusts of 45 mph, a 60% chance of rain or a feels-like temperature of -8°C or below make it Marginal. Today's and tomorrow's ratings are at the top of this page. The rating covers the weather only: also check your route, daylight, kit and experience, and in winter whether you need an ice axe and crampons.
What is the weather on Gran Testa di By tomorrow?
Monday 19 October: slight snow showers, up to -2°C at the summit, feeling as cold as -11°C, summit wind 29 mph gusting 54 mph, 65% chance of rain. Rated Marginal.
What is the weather on Gran Testa di By this weekend?
Sunday 18 October: heavy snow showers, up to -3°C at the summit, feeling as cold as -13°C, summit wind 34 mph gusting 60 mph, 73% chance of rain. Rated Marginal.
What weather information is shown for Gran Testa di By?
The page includes cached mountain forecast context, snow outlook, dark-sky signals, cloud-inversion information, sunrise, sunset, and summit planning details where available.
Written and kept up to date by the Peakify team. The forecast refreshes every hour; how our forecast works.
