Sion Monthly Climate Averages

To help you choose the best time to travel, you can find climate data below on the weather in Sion .


Month	t°C day	t°C night	mm rain	daylight

January	+4.4	-3.6	51	9.6h
February	+6.9	-2.3	47	10.9h
March	+12.5	+1.4	42	12.5h
April	+16.6	+4.5	35	14.2h
May	+21	+8.7	49	15.6h
June	+24.5	+11.8	54	16.4h
July	+27	+13.8	58	16h
August	+26.1	+13.3	57	14.7h
September	+21.7	+9.9	44	13h
October	+16.7	+5.6	52	11.4h
November	+9.5	+0.4	52	10h
December	+4.7	-2.6	64	9.2h

Best places

Best time with the soft weather for the sightseeing and long walks in Sion are May, June, July, August, September.

Temperature in Sion

The table shows that the hottest months in Sion are July and August, during which the average daytime temperature reaches +27°C and the nighttime temperature falls to +13.8°C.

The coldest months are January and December, when the daily average temperature falls to +4.4°C, and drops to -3.6°C during the night.

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