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Detailed cycling weather forecast for Petit Saint Bernard Pass. See wind direction, temperature and rain along the entire climb and descent.
✓ Open
Pass Information
2,188m
Elevation
Current status:
open
Opening Period:
Wintersperre
Current Conditions
Could not reliably identify pass 'Col du Petit St. Bernard' in Savoie external list.
Thu
14 May
ac_unit
Snow showers
06:02
—
20:55
-1°
/
-4°
Precipitation
21 mm
Humidity
93 %
🚴♂️ Opening & Seasonal Access
📅 Typical Opening Dates
- The road over the Petit Saint‑Bernard is generally open to motor vehicles and cyclists from late May or early June until October — exact dates depend on snow conditions each year.
- One source shows open from about 1 June to 31 October (2026), closed otherwise (late fall through spring).
- In some years, early or late closures can happen due to weather or road works — in 2025 it closed early on 22 September for maintenance.
✔️ For cyclists: plan your ride between June and October for the best chance the pass is clear of snow and open. Outside that, the road will be officially closed and unsafe.
🌦️ Weather Conditions to Expect
🏔️ Alpine Climate Characteristics
At ~2188 m, the weather is mountain weather — significantly cooler and more changeable than in valleys:
- Temperature ranges (approx.) at Saint‑Bernard area:
- June–August: 10–22 °C daytime.
- September: ~9–18 °C.
- Spring / Autumn: can be much colder, with freezing possible.
- Snow can persist around the pass even after it’s opened, and snow showers are possible even in July.
- Expect rapid weather changes, including sudden rain, wind, fog and lower visibility — typical for high Alpine passes.
🌧️ Typical Summer Weather (Cycling Season)
- Summer (June‑August): Best cycling season — still cool at top, warmer at base; afternoons sometimes bring thunderstorms (common in mountains).
- September: Usually mild, but cooling quickly and shorter daylight.
🚴 Cyclist‑Specific Conditions
🧗♂️ Road & Traffic
- Once open, the pass is regularly cleared and maintained, though snowbanks may remain early season near summit.
- Summer sees tourist traffic, but morning rides avoid most cars.
- After closure, the road is not safe for cycling — snow, ice, and lack of maintenance make it dangerous.
🛠️ Preparation Tips
- Clothing: Windproof layer, thermal arm/leg warmers — temps drop near summit.
- Rain gear: Mandatory — afternoon showers/thunderstorms often develop quickly.
- Timing: Ride early morning — good weather window + less traffic.
⛰️ Risks to Keep in Mind
- Snow patches can linger near summit early and late season.
- Storms common in afternoon — risk of flash weather changes.
- Temperature drop: ~10 °C difference or more between valley and summit.
📌 Short Summary for Cyclists
Best riding window:
👉 June through October — road usually open and plowed.
👉 June through October — road usually open and plowed.
Weather you’ll see:
- Cool summit temperatures, even summer — often 10–15 °C at top.
- Rain and storms possible nearly every summer day; snow can still appear near opening.
Advice:
🚴 Ride early, bring layers and rain gear, check local road opening status before planning. Advance info from local tourism or official road sites (e.g., savoie‑routes.fr) is important because dates shift year‑to‑year.
🚴 Ride early, bring layers and rain gear, check local road opening status before planning. Advance info from local tourism or official road sites (e.g., savoie‑routes.fr) is important because dates shift year‑to‑year.
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Col du Petit Saint-Bernard
Route Map
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Wind Along Route
Weather Forecast
Next 7 Days
Thu
14 May
ac_unit
Snow showers
06:02
—
20:55
-1°
/
-4°
Precipitation
21 mm
Humidity
93 %
Fri
15 May
ac_unit
Snow showers
06:01
—
20:56
-1°
/
-5°
Precipitation
7 mm
Humidity
90 %
Sat
16 May
ac_unit
Snow showers
06:00
—
20:57
-1°
/
-5°
Precipitation
5 mm
Humidity
95 %
Sun
17 May
foggy
Fog
05:58
—
20:58
3°
/
-5°
Precipitation
0 mm
Humidity
98 %
Mon
18 May
foggy
Fog
05:57
—
21:00
6°
/
-2°
Precipitation
0 mm
Humidity
100 %
Tue
19 May
water_drop
Rain showers
05:56
—
21:01
9°
/
1°
Precipitation
1 mm
Humidity
91 %
Wed
20 May
cloud
Partly cloudy
05:55
—
21:02
11°
/
2°
Precipitation
0 mm
Humidity
87 %
Climate Overview
Climate Overview
| Month |
Temp Day
|
Temp Night
|
Sunny Days
|
Sun Hours
|
Rain Days
|
Precipitation
|
Humidity
|
UV Index
|
Day Length
|
|---|---|---|---|---|---|---|---|---|---|
| Jan | -3°C | -12°C | 17 | 6.0h | 21 | 226 mm | 75 % | 2 | 9h 10m |
| Feb | -1°C | -11°C | 23 | 7.9h | 13 | 42 mm | 73 % | 3 | 10h 24m |
| Mar | 0°C | -10°C | 27 | 9.7h | 16 | 57 mm | 70 % | 4 | 11h 56m |
| Apr | 4°C | -4°C | 27 | 10.6h | 12 | 180 mm | 68 % | 5 | 13h 33m |
| May | 6°C | -2°C | 29 | 11.8h | 17 | 81 mm | 65 % | 6 | 14h 56m |
| Jun | 15°C | 3°C | 30 | 13.9h | 16 | 66 mm | 67 % | 7 | 15h 38m |
| Jul | 14°C | 4°C | 31 | 13.3h | 23 | 84 mm | 66 % | 8 | 15h 16m |
| Aug | 16°C | 5°C | 29 | 12.4h | 15 | 62 mm | 68 % | 7 | 14h 3m |
| Sep | 11°C | 1°C | 25 | 9.6h | 17 | 117 mm | 70 % | 5 | 12h 31m |
| Oct | 6°C | -3°C | 22 | 7.5h | 14 | 224 mm | 72 % | 4 | 10h 54m |
| Nov | 0°C | -11°C | 21 | 6.6h | 12 | 122 mm | 76 % | 2 | 9h 29m |
| Dec | -1°C | -10°C | 20 | 6.3h | 16 | 59 mm | 77 % | 2 | 8h 45m |