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Hourly
7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Sion, VS
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May
Average Temperature
High
10°
Feels 8
Low
0°
Feels -2
Average Precipitation
19 Days
Rain amount
187.4mm
Snow amount
13.5cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
18°
19
20°
20
22°
21
25°
22
27°
23
29°
24
27°
25
29°
26
27°
27
26°
28
27°
29
27°
30
26°
31
24°
Forecast
Monday, May 18, 2026
Day
18°
Feels 18
Wind
24 km/h W
Gust
36 km/h
Humidity
64%
P.O.P
80%
Rain
1-3 mm
Night
7°
Feels 7
Wind
18 km/h S
Gust
27 km/h
Humidity
92%
P.O.P
40%
Rain
~1 mm
Historical Averages
May 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.