What are the cycling conditions like in Col du Granon?

🗻 Col du Granon – Seasonal Access & Weather Overview 📅 Seasonal Access / Pass Opening Snow closure: At ~2400 m, the road up to Col du Granon is typically closed in winter due to snow and ice — snow can persist high on the pass well into late spring. Although exact dates vary by year and snowfall, higher Alpine passes usually open around late May to early June after snow clearing. Cyclist-focused closures: In summer and autumn there are occasional car-free cycling events where the climb is reserved for cyclists on specific dates (usually in morning hours between June and October). Because of its altitude, definitive open dates aren’t fixed — actual accessibility depends on yearly snow melt and road clearing (typical practice for Alpine passes). Local road bulletins (e.g., departmental info “État des cols”) are best to check for current status before planning. ☀️ General Weather by Season (Cycling Perspective) 🧊 Winter (Dec — Mar / Apr) Typically snow-covered and unsafe or impassable for regular road bikes. Snow and ice dominate at high altitude, and daily lows are often well below freezing. Roads are closed due to snow , not maintained regularly. 🌼 Spring (Apr — May) Snow melt begins; lower slopes become rideable earlier, but upper sections often remain blocked by snow/ice into May. Weather is unpredictable: warm valley temperatures can coincide with cold wind, snow patches high up, and unstable weather . ☀️ Summer (Jun — Aug) Best cycling period. Roads generally become passable in June through early September if snow clearance is done. Daytime temps can be mild to warm at lower elevations, but at the summit expect cool conditions, strong winds, and sharp temperature drops — even in July and August. Afternoon thunderstorms are common in high mountains — planning early starts helps avoid severe weather. 🍁 Autumn (Sep — Oct) Early autumn can be excellent : stable weather, lower crowding, and cooler temperatures. By October – especially late October , snowfall can return; events may temporarily close parts of the road for cyclists. After early November snow conditions usually make the pass unrideable by bike. 🌦 Weather Characteristics that Cyclists Should Expect Rapid changes: Weather at >2000 m altitude changes quickly — sun, cloud, rain, and even snow can occur in summer . Temperature gradients: Expect notable temperature drops with elevation (cool summit even when valley feels warm). Wind: Exposed sections above tree line are often windy , increasing perceived effort and chill. Thunderstorms: Common in alpine afternoons in summer — plan early ascents. 🧭 Summary for Cyclists Best months to ride: June through September , depending on snow clearance. Not advisable: December through late spring snow season — snow and ice make the road unsafe or closed. Weather you must prepare for: cool tops even in summer, potential rain/thunderstorms, strong winds, and quick weather shifts. Check local conditions: Always verify latest pass status and weather forecasts before planning your ride — conditions vary each year.

Back to Alpine Passes

Detailed cycling weather forecast for Col du Granon. See wind direction, temperature and rain along the entire climb and descent.

✗ Closed

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Pass Information

2,404m

Elevation

Current status: closed

Opening Period: Wintersperre

Current Conditions

D234T from Saint-Joseph parking to Granon pass, the road is closed from 20/10/25 at 11:43 am until approximately 15/06/26.

Wed

11 Mar

ac_unit

Snow

06:53 — 18:33

-1° / -5°

Precipitation 1 mm

Humidity 100 %

🗻 Col du Granon – Seasonal Access & Weather Overview

📅 Seasonal Access / Pass Opening

Snow closure: At ~2400 m, the road up to Col du Granon is typically closed in winter due to snow and ice — snow can persist high on the pass well into late spring. Although exact dates vary by year and snowfall, higher Alpine passes usually open around late May to early June after snow clearing.
Cyclist-focused closures: In summer and autumn there are occasional car-free cycling events where the climb is reserved for cyclists on specific dates (usually in morning hours between June and October).
Because of its altitude, definitive open dates aren’t fixed — actual accessibility depends on yearly snow melt and road clearing (typical practice for Alpine passes). Local road bulletins (e.g., departmental info “État des cols”) are best to check for current status before planning.

☀️ General Weather by Season (Cycling Perspective)

🧊 Winter (Dec — Mar / Apr)

Typically snow-covered and unsafe or impassable for regular road bikes. Snow and ice dominate at high altitude, and daily lows are often well below freezing.
Roads are closed due to snow, not maintained regularly.

🌼 Spring (Apr — May)

Snow melt begins; lower slopes become rideable earlier, but upper sections often remain blocked by snow/ice into May.
Weather is unpredictable: warm valley temperatures can coincide with cold wind, snow patches high up, and unstable weather.

☀️ Summer (Jun — Aug)

Best cycling period. Roads generally become passable in June through early September if snow clearance is done.
Daytime temps can be mild to warm at lower elevations, but at the summit expect cool conditions, strong winds, and sharp temperature drops — even in July and August.
Afternoon thunderstorms are common in high mountains — planning early starts helps avoid severe weather.

🍁 Autumn (Sep — Oct)

Early autumn can be excellent: stable weather, lower crowding, and cooler temperatures.
By October – especially late October, snowfall can return; events may temporarily close parts of the road for cyclists.
After early November snow conditions usually make the pass unrideable by bike.

🌦 Weather Characteristics that Cyclists Should Expect

Rapid changes: Weather at >2000 m altitude changes quickly — sun, cloud, rain, and even snow can occur in summer.
Temperature gradients: Expect notable temperature drops with elevation (cool summit even when valley feels warm).
Wind: Exposed sections above tree line are often windy, increasing perceived effort and chill.
Thunderstorms: Common in alpine afternoons in summer — plan early ascents.

🧭 Summary for Cyclists

Best months to ride: June through September, depending on snow clearance.
Not advisable: December through late spring snow season — snow and ice make the road unsafe or closed.
Weather you must prepare for: cool tops even in summer, potential rain/thunderstorms, strong winds, and quick weather shifts.
Check local conditions: Always verify latest pass status and weather forecasts before planning your ride — conditions vary each year.

Check weather on own route

Location

Weather Forecast

Next 7 Days

Wed

11 Mar

ac_unit

Snow

06:53 — 18:33

-1° / -5°

Precipitation 1 mm

Humidity 100 %

Thu

12 Mar

ac_unit

Snow

06:51 — 18:35

1° / -6°

Precipitation 1 mm

Humidity 96 %

Fri

13 Mar

cloud

Overcast

06:49 — 18:36

1° / -4°

Precipitation 0 mm

Humidity 96 %

Sat

14 Mar

ac_unit

Snow showers

06:47 — 18:37

-4° / -10°

Precipitation 16 mm

Humidity 98 %

Sun

15 Mar

ac_unit

Snow showers

06:45 — 18:39

-3° / -10°

Precipitation 4 mm

Humidity 100 %

Mon

16 Mar

cloud

Overcast

06:43 — 18:40

1° / -5°

Precipitation 0 mm

Humidity 87 %

Tue

17 Mar

cloud

Overcast

06:41 — 18:41

4° / -4°

Precipitation 0 mm

Humidity 78 %

Climate Overview

Month	Temp Day	Temp Night	Sunny Days	Sun Hours	Rain Days	Precipitation	Humidity	UV Index	Day Length
Jan	-3°C	-12°C	16	5.2h	23	194 mm	75 %	2	9h 13m
Feb	-2°C	-11°C	18	6.8h	10	38 mm	73 %	3	10h 26m
Mar	-1°C	-10°C	22	8.1h	16	95 mm	70 %	4	11h 57m
Apr	3°C	-6°C	24	9.7h	14	143 mm	68 %	5	13h 31m
May	7°C	-2°C	29	11.8h	16	79 mm	65 %	6	14h 52m
Jun	17°C	6°C	29	13.7h	15	62 mm	67 %	7	15h 33m
Jul	14°C	4°C	31	13.4h	18	91 mm	66 %	8	15h 12m
Aug	15°C	4°C	28	12.0h	11	71 mm	68 %	7	14h 1m
Sep	11°C	0°C	26	10.0h	13	95 mm	70 %	5	12h 30m
Oct	6°C	-3°C	25	8.1h	13	122 mm	72 %	4	10h 56m
Nov	0°C	-8°C	21	6.6h	14	121 mm	76 %	2	9h 33m
Dec	-2°C	-10°C	16	5.0h	15	47 mm	77 %	2	8h 49m