Best year time to visit Sion

General weather information about Sion

Average annual temperature is 9.5 °C

Absolute maximum temperature: 41.2 °C

Absolute minimum temperature: -21.9 °C

Number of sunny days: 184 days

Number of rainy days: 135 days

Number of snow days: 46 days

Look at detailed online map of Sion

* Weather data for Sion Canada is based on climate observations for 2026 year

Sion air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	10.1	8.9	14.4	27.3	32.1	33.3	37.2	41.2	30.9	24.2	10.7	8.0
Average daytime temperature (°C)	3.0	3.7	8.0	13.7	25.1	26.7	32.3	32.0	23.7	16.1	7.2	4.9
Average temperature (°C)	-2.3	-3.3	0.3	7.0	17.1	18.8	23.3	23.0	16.0	9.3	2.0	1.2
Average night temperature (°C)	-6.2	-8.6	-7.0	1.4	10.2	11.3	14.4	15.0	9.9	4.4	-0.9	-1.2
Absolute minimum temperature (°C)	-20.3	-21.9	-12.8	-6.2	4.6	6.3	8.7	9.7	2.1	-5.4	-5.0	-5.4

Sion monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	9.0	10.0	12.0	14.0	15.0	16.0	16.0	15.0	13.0	11.0	9.0	8.0
Daylight mean duration (h)	8.8	10.2	11.9	13.7	15.3	16.1	15.7	14.3	12.6	10.8	9.2	8.3
Daylight minimum duration (h)	8.0	9.0	10.0	12.0	14.0	15.0	15.0	13.0	11.0	9.0	8.0	8.0
Sunshine mean duration (h)	4.2	5.8	8.3	8.7	12.2	12.9	13.9	11.9	9.8	7.9	5.5	3.4
Precipitation (mm)	41	28	33	81	108	61	15	62	67	30	55	78
Sunny days	14	12	14	8	8	17	27	20	17	16	18	13
Rainy days	10	3	6	17	23	13	4	11	13	13	11	11
Snow days	7	13	11	5	0	0	0	0	0	2	1	7

Sion - weather forecast by months

Sion weather in january Sion weather in february Sion weather in march Sion weather in april Sion weather in may Sion weather in june Sion weather in july Sion weather in august Sion weather in september Sion weather in october Sion weather in november Sion weather in december

Best time to visit Sion:

The best time to visit Sion during the most sunny months:

May — 12.2(h)
June — 12.9(h)
July — 13.9(h)
August — 11.9(h)

Months with the longest average daylight duration in Sion:

June — 16.1(h)
July — 15.7(h)

The largest precipitation sum in Sion is at

April — 81(mm)

May — 108(mm)

December — 78(mm)

Weather forecast in the closest to Sion admin centers