Frost Dates for SION 2, Switzerland

Elevation: 482 m

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. April 19
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 25
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.

Last Spring Frost April 29
First Fall Frost October 13

Hard Freeze (−2°C)

Last Spring Hard Freeze April 5
First Fall Hard Freeze November 3
46.22°N, 7.33°W © OpenStreetMap

Growing Season

189 Days April 19 to October 25

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 7a

Avg. annual minimum: −18 to −15°C

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Cfb Oceanic (Marine West Coast)

Mild year-round with cool summers and wet winters. Excellent for cool-season crops like brassicas, peas, and root vegetables. Extended harvest seasons but summer heat-loving crops may struggle.

Köppen climate map

Temperature

-5° 5° 15° 25°
0°
High: 4°C
Avg: 0°C
Low: -5°C
Jan
1°
High: 6°C
Avg: 1°C
Low: -3°C
Feb
5°
High: 10°C
Avg: 5°C
Low: 1°C
Mar
9°
High: 13°C
Avg: 9°C
Low: 5°C
Apr
13°
High: 18°C
Avg: 13°C
Low: 9°C
May
18°
High: 22°C
Avg: 18°C
Low: 13°C
Jun
20°
High: 25°C
Avg: 20°C
Low: 15°C
Jul
20°
High: 25°C
Avg: 20°C
Low: 15°C
Aug
16°
High: 21°C
Avg: 16°C
Low: 11°C
Sep
12°
High: 17°C
Avg: 12°C
Low: 7°C
Oct
5°
High: 9°C
Avg: 5°C
Low: 0°C
Nov
0°
High: 4°C
Avg: 0°C
Low: -4°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 50 mm 100 mm 150 mm 200 mm
127 mm
127.0 mm
Jan
109 mm
109.2 mm
Feb
107 mm
106.7 mm
Mar
117 mm
116.8 mm
Apr
178 mm
177.8 mm
May
165 mm
165.1 mm
Jun
173 mm
172.7 mm
Jul
160 mm
160.0 mm
Aug
127 mm
127.0 mm
Sep
112 mm
111.8 mm
Oct
130 mm
129.5 mm
Nov
137 mm
137.2 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h15h15.5h15h14h12.5h10.5h9h8.5h
Jan: 7:36 AM – 4:24 PM · 8h 48m
Feb: 6:57 AM – 5:03 PM · 10h 06m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:20 AM – 6:40 PM · 13h 20m
May: 4:37 AM – 7:23 PM · 14h 46m
Jun: 4:13 AM – 7:47 PM · 15h 34m
Jul: 4:23 AM – 7:37 PM · 15h 14m
Aug: 5:01 AM – 6:59 PM · 13h 59m
Sep: 5:51 AM – 6:09 PM · 12h 19m
Oct: 6:41 AM – 5:19 PM · 10h 39m
Nov: 7:25 AM – 4:35 PM · 9h 10m
Dec: 7:47 AM – 4:13 PM · 8h 26m
Daylight Longest: 15h 35m · Shortest: 8h 25m

Nearby Stations

COL DU GRAND ST-BERNARD, Switzerland June 22 - July 23 PIAN ROSA (MTN TOP), Italy June 29 - July 5 PAYERNE, Switzerland April 14 - November 9 GENEVE OBSERVATOIRE, Switzerland April 5 - November 11 GENEVE COINTRIN, Switzerland April 1 - November 14 LUGANO, Switzerland March 12 - December 1

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