What are the cycling conditions like in Grimselpass?

🚴♂️ Grimselpass — Key Info for Cyclists 🗓️ When the Pass Is Open Seasonal opening: The Grimsel Pass road is seasonal , typically open from late May / early June through October , depending on snow conditions and weather. Official winter closure: Most years the pass closes around October and stays closed through May due to snow at high altitude (2,164 m). Exact dates vary: Opening/closing dates change yearly based on snowfall and melt — in past years openings were mostly mid‑June to early November and closures started in October/November . Weather‑dependent: Even in the opening season, sudden snow or storms can briefly close the pass or make conditions challenging. 🌦️ Weather & Road Conditions to Expect 🌡️ Temperature At the summit (~2164 m) it stays cool even in summer . Daily highs often range below 15 °C , especially early/late season. ❄️ Snow & Precipitation Snow can fall anytime above ~2000 m — even in summer — especially in cooler spells. During early/late season you may see snow patches near the summit and potentially icy surfaces early in the morning or after rain. ☁️ Wind & Storms Alpine weather changes quickly — clear skies can turn to wind, rain, or fog on a climb. Always check local forecasts before riding. 🚴♂️ Road Surface The pass road is paved and maintained , but watch out for wet patches , runoff water from melting snow, and debris after storms. 🧗♂️ Cycling Considerations Gradient & length: The climb is long and moderate (~38 km from Gletsch to Meiringen), averaging around ~5–7 % with steeper sections. Gear & clothing: Bring layers — vests or wind jackets are useful for cool summit conditions; gloves are helpful on descents. Time of day: Starting earlier helps avoid afternoon storms and gives more predictable conditions on high roads. Traffic: Summers can be busy with cars and motorcycles — plan your ride on quieter days/times if possible. 🧠 Quick Summary Open season: Generally June – October , with dates varying based on snow melt and weather. Closed: Typically late October through May/early June due to snow. Expect: Cool temperatures at altitude, rapid weather changes , possible snow/ice early or late in season, and classic alpine conditions that make the climb spectacular but sometimes challenging. Best months for cyclists: July through September for the most stable weather and fully open roads.

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

✓ Open Bern/Valais, CH

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Pass Information

2,165m

Elevation

11.0%

Max Gradient

24.0 km

Length

Current status: open

Opening Period: Wintersperre

Current Conditions

H6 Grimselstraße | Route: Innertkirchen - Gletsch | Öffnungszeiten: Während der Wintermonate gesperrt. | Strecke ist anspruchsvoll. Entsprechende Fahrpraxis erforderlich. | Höchstgewicht 34 t zwischen Innertkirchen und Meiringen. | Computed opening: openAllDay=True, openNextHour=True, minutesLeftOpen=2644, minutesLeftClosed=0

Mon

13 Jul

water_drop

Rain showers

05:46 — 21:17

20° / 10°

Precipitation 0 mm

Humidity 91 %

🚴‍♂️ Grimselpass — Key Info for Cyclists

🗓️ When the Pass Is Open

Seasonal opening: The Grimsel Pass road is seasonal, typically open from late May / early June through October, depending on snow conditions and weather.
Official winter closure: Most years the pass closes around October and stays closed through May due to snow at high altitude (2,164 m).
Exact dates vary: Opening/closing dates change yearly based on snowfall and melt — in past years openings were mostly mid‑June to early November and closures started in October/November.
Weather‑dependent: Even in the opening season, sudden snow or storms can briefly close the pass or make conditions challenging.

🌦️ Weather & Road Conditions to Expect

🌡️ Temperature

At the summit (~2164 m) it stays cool even in summer. Daily highs often range below 15 °C, especially early/late season.

❄️ Snow & Precipitation

Snow can fall anytime above ~2000 m — even in summer — especially in cooler spells.
During early/late season you may see snow patches near the summit and potentially icy surfaces early in the morning or after rain.

☁️ Wind & Storms

Alpine weather changes quickly — clear skies can turn to wind, rain, or fog on a climb. Always check local forecasts before riding.

🚴‍♂️ Road Surface

The pass road is paved and maintained, but watch out for wet patches, runoff water from melting snow, and debris after storms.

🧗‍♂️ Cycling Considerations

Gradient & length: The climb is long and moderate (~38 km from Gletsch to Meiringen), averaging around ~5–7 % with steeper sections.
Gear & clothing: Bring layers — vests or wind jackets are useful for cool summit conditions; gloves are helpful on descents.
Time of day: Starting earlier helps avoid afternoon storms and gives more predictable conditions on high roads.
Traffic: Summers can be busy with cars and motorcycles — plan your ride on quieter days/times if possible.

🧠 Quick Summary

Open season: Generally June – October, with dates varying based on snow melt and weather.
Closed: Typically late October through May/early June due to snow.
Expect: Cool temperatures at altitude, rapid weather changes, possible snow/ice early or late in season, and classic alpine conditions that make the climb spectacular but sometimes challenging.

Best months for cyclists: July through September for the most stable weather and fully open roads.

Check weather on own route

Location

Weather Forecast

Next 7 Days

Mon

13 Jul

water_drop

Rain showers

05:46 — 21:17

20° / 10°

Precipitation 0 mm

Humidity 91 %

Tue

14 Jul

flash_on

Thunderstorm

05:47 — 21:17

17° / 12°

Precipitation 4 mm

Humidity 92 %

Wed

15 Jul

flash_on

Thunderstorm

05:48 — 21:16

17° / 10°

Precipitation 5 mm

Humidity 93 %

Thu

16 Jul

cloud

Overcast

05:49 — 21:15

18° / 9°

Precipitation 0 mm

Humidity 100 %

Fri

17 Jul

flash_on

Thunderstorm

05:50 — 21:14

16° / 11°

Precipitation 11 mm

Humidity 93 %

Sat

18 Jul

water_drop

Rain showers

05:51 — 21:14

13° / 9°

Precipitation 0 mm

Humidity 96 %

Sun

19 Jul

water_drop

Rain showers

05:52 — 21:13

13° / 8°

Precipitation 2 mm

Humidity 88 %

Climate Overview

Month	Temp Day	Temp Night	Sunny Days	Sun Hours	Rain Days	Precipitation	Humidity	UV Index	Day Length
Jan	-4°C	-12°C	14	4.6h	21	143 mm	75 %	2	9h 4m
Feb	-2°C	-10°C	17	6.5h	13	45 mm	73 %	3	10h 21m
Mar	-1°C	-9°C	23	8.4h	15	87 mm	70 %	4	11h 56m
Apr	3°C	-4°C	23	10.0h	12	179 mm	68 %	5	13h 36m
May	5°C	-2°C	27	11.0h	17	108 mm	65 %	6	15h 1m
Jun	12°C	2°C	29	13.8h	10	47 mm	67 %	7	15h 45m
Jul	9°C	1°C	31	12.9h	20	113 mm	66 %	8	15h 22m
Aug	12°C	3°C	30	11.8h	11	113 mm	68 %	7	14h 7m
Sep	11°C	1°C	26	9.6h	18	205 mm	70 %	5	12h 31m
Oct	5°C	-3°C	21	7.6h	14	110 mm	72 %	4	10h 52m
Nov	-1°C	-8°C	19	6.2h	15	74 mm	76 %	2	9h 25m
Dec	-1°C	-9°C	17	4.9h	15	41 mm	77 %	2	8h 38m