What are the cycling conditions like in Grosser Sankt Bernhard?

🚴♂️ Pass Accessibility (Road Opening / Closing) 🟢 Usable for Cycling Typical open season: Late May to mid-October each year. Official closures in recent years show openings often from early/mid-June to mid-October (exact dates vary with snow). 🔒 Closed for Winter The main high road over the pass closes in autumn (often late October) and remains closed through winter and spring due to heavy snow, avalanche risk, and unsafe conditions. A tunnel beneath the pass stays open year-round for vehicle traffic , but that is not a cycling route and often not suitable or legal for cyclists. ☀️ General Weather Conditions Through the Year ❄️ Winter & Early Spring (Nov–Apr) Very heavy snowfall (10 m+ possible), strong winds and extremely low temperatures (down to -30°C at elevation). Too cold and snow-covered for cycling at the summit. Snow usually doesn’t clear until late spring. 🌦️ Late Spring (May–June) Snow starts melting; base areas thaw sooner than summit. However, snow may still linger on the road into May , and opening can be delayed until June depending on snow clearance and safety. Expect mix of cool days (~5–15 °C) and possible snow patches in early season. ☀️ Summer (June–Sept) Best cycling period — daytime temps often mild to warm , but can still be cool near the summit, especially early morning or late evening. Afternoon thunderstorms and sudden weather changes are common in the Alps in summer. Pack layers and rain/wind protection. Road surfaces are usually clear by June-July , with long daylight hours. 🍂 Autumn (Oct) Weather becomes unstable; first snowfalls often in September/October . Pass is typically closed again by mid-October as ski season preparations begin. Road riding before closure can still be good but with higher risk of cold and early snow. 📌 Rider Tips (Year-round Planning) Season window: Plan your ride between June and mid-October for safest surface and open roads. Be prepared for cold at elevation year-round — even in summer nights and mornings. Spring opening dates are highly variable — check local road closures before planning . Weather can change fast in the Alps; rain and thunderstorms are quite possible even in summer. 🧭 Short Summary Great St. Bernard Pass is typically open for cycling from late May/June until mid-October. Outside this window, deep snow and dangerous conditions make the pass route unsuitable and officially closed. Summer offers the most reliable riding conditions — mild temperatures and mostly clear pavement — but always be ready for alpine weather surprises.

Back to Alpine Passes

Detailed cycling weather forecast for Grosser Sankt Bernhard. See wind direction, temperature and rain along the entire climb and descent.

✗ Closed Valais, CH

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Pass Information

2,469m

Elevation

11.0%

Max Gradient

44.0 km

Length

Current status: closed

Opening Period: Wintersperre

Current Conditions

Bourg-St-Pierre - national border. Important note: On 20 October 2025 from 0800 hours, the Great St Bernard Pass will be closed for the winter.

Tue

28 Apr

ac_unit

Snow

06:22 — 20:34

4° / 1°

Precipitation 10 mm

Humidity 98 %

🚴‍♂️ Pass Accessibility (Road Opening / Closing)

🟢 Usable for Cycling

Typical open season: Late May to mid-October each year.
Official closures in recent years show openings often from early/mid-June to mid-October (exact dates vary with snow).

🔒 Closed for Winter

The main high road over the pass closes in autumn (often late October) and remains closed through winter and spring due to heavy snow, avalanche risk, and unsafe conditions.
A tunnel beneath the pass stays open year-round for vehicle traffic, but that is not a cycling route and often not suitable or legal for cyclists.

☀️ General Weather Conditions Through the Year

❄️ Winter & Early Spring (Nov–Apr)

Very heavy snowfall (10 m+ possible), strong winds and extremely low temperatures (down to -30°C at elevation).
Too cold and snow-covered for cycling at the summit. Snow usually doesn’t clear until late spring.

🌦️ Late Spring (May–June)

Snow starts melting; base areas thaw sooner than summit.
However, snow may still linger on the road into May, and opening can be delayed until June depending on snow clearance and safety.
Expect mix of cool days (~5–15 °C) and possible snow patches in early season.

☀️ Summer (June–Sept)

Best cycling period — daytime temps often mild to warm, but can still be cool near the summit, especially early morning or late evening.
Afternoon thunderstorms and sudden weather changes are common in the Alps in summer. Pack layers and rain/wind protection.
Road surfaces are usually clear by June-July, with long daylight hours.

🍂 Autumn (Oct)

Weather becomes unstable; first snowfalls often in September/October.
Pass is typically closed again by mid-October as ski season preparations begin.
Road riding before closure can still be good but with higher risk of cold and early snow.

📌 Rider Tips (Year-round Planning)

Season window: Plan your ride between June and mid-October for safest surface and open roads.
Be prepared for cold at elevation year-round — even in summer nights and mornings.
Spring opening dates are highly variable — check local road closures before planning.
Weather can change fast in the Alps; rain and thunderstorms are quite possible even in summer.

🧭 Short Summary

Great St. Bernard Pass is typically open for cycling from late May/June until mid-October. Outside this window, deep snow and dangerous conditions make the pass route unsuitable and officially closed. Summer offers the most reliable riding conditions — mild temperatures and mostly clear pavement — but always be ready for alpine weather surprises.

Check weather on own route

Location

Weather Forecast

Next 7 Days

Tue

28 Apr

ac_unit

Snow

06:22 — 20:34

4° / 1°

Precipitation 10 mm

Humidity 98 %

Wed

29 Apr

water_drop

Rain showers

06:21 — 20:35

5° / 1°

Precipitation 6 mm

Humidity 100 %

Thu

30 Apr

foggy

Fog

06:19 — 20:37

4° / 0°

Precipitation 0 mm

Humidity 100 %

Fri

01 May

foggy

Fog

06:18 — 20:38

8° / -1°

Precipitation 0 mm

Humidity 100 %

Sat

02 May

cloud

Overcast

06:16 — 20:39

7° / -1°

Precipitation 0 mm

Humidity 88 %

Sun

03 May

water_drop

Light rain

06:15 — 20:40

6° / 0°

Precipitation 1 mm

Humidity 86 %

Mon

04 May

ac_unit

Snow

06:13 — 20:42

4° / 0°

Precipitation 5 mm

Humidity 100 %

Climate Overview

Month	Temp Day	Temp Night	Sunny Days	Sun Hours	Rain Days	Precipitation	Humidity	UV Index	Day Length
Jan	-4°C	-11°C	18	6.0h	20	207 mm	75 %	2	9h 8m
Feb	-2°C	-10°C	22	8.0h	11	51 mm	73 %	3	10h 23m
Mar	-2°C	-9°C	26	9.4h	12	66 mm	70 %	4	11h 57m
Apr	2°C	-5°C	26	10.4h	15	169 mm	68 %	5	13h 34m
May	4°C	-2°C	28	11.5h	20	133 mm	65 %	6	14h 58m
Jun	12°C	3°C	29	13.5h	19	71 mm	67 %	7	15h 40m
Jul	11°C	2°C	31	12.9h	27	165 mm	66 %	8	15h 18m
Aug	14°C	4°C	30	12.5h	17	113 mm	68 %	7	14h 4m
Sep	9°C	0°C	24	9.4h	18	200 mm	70 %	5	12h 31m
Oct	4°C	-4°C	23	8.0h	13	201 mm	72 %	4	10h 54m
Nov	-2°C	-10°C	19	6.2h	14	162 mm	76 %	2	9h 28m
Dec	-2°C	-9°C	21	6.4h	16	53 mm	77 %	2	8h 43m