Monthly weather forecast and climate
Sion, Switzerland

January, like December, is another subzero cold winter month in Sion, Switzerland, with average temperature varying between -2.5°C (27.5°F) and -11°C (12.2°F). January is the coldest month, with an average high-temperature of -2.5°C (27.5°F) and an average low-temperature of -11°C (12.2°F). Weather in January »

The last month of the winter, February, is also a subzero cold month in Sion, Switzerland, with average temperature fluctuating between -11°C (12.2°F) and -2.3°C (27.9°F). In Sion, Switzerland, the average high-temperature in February is essentially the same as in January - a still freezing cold -2.3°C (27.9°F). Weather in February »

The first month of the spring, March, is a cold month in Sion, Switzerland, with average temperature fluctuating between 0.9°C (33.6°F) and -7.7°C (18.1°F). In March, the average high-temperature slightly increases, from a subzero cold -2.3°C (27.9°F) in February, to a wintry 0.9°C (33.6°F). Weather in March »

April, like March, in Sion, Switzerland, is a wintry spring month, with average temperature fluctuating between -3.2°C (26.2°F) and 5°C (41°F). In Sion, the average high-temperature marginally rises, from a cold 0.9°C (33.6°F) in March, to a still wintry 5°C (41°F). Weather in April »

The last month of the spring, May, is a chilly month in Sion, Switzerland, with temperature in the range of an average high of 8.7°C (47.7°F) and an average low of 0.2°C (32.4°F). In Sion, the average high-temperature marginally rises, from a cold 5°C (41°F) in April, to a frosty 8.7°C (47.7°F). Weather in May »

The first month of the summer, June, is a moderate month in Sion, Switzerland, with temperature in the range of an average high of 13.9°C (57°F) and an average low of 4.3°C (39.7°F). In Sion, Switzerland, the average high-temperature increases, from a chilly 8.7°C (47.7°F) in May, to a mild 13.9°C (57°F). Weather in June »

July in Sion, Switzerland, is an enjoyable summer month, with average temperature ranging between max 16.5°C (61.7°F) and min 6.3°C (43.3°F). In July, the average high-temperature is almost the same as in June - a comfortable 16.5°C (61.7°F). Weather in July »

August, the last month of the summer, in Sion, is also an enjoyable month, with temperature in the range of an average high of 16.7°C (62.1°F) and an average low of 6.4°C (43.5°F). With an average high-temperature of 16.7°C (62.1°F) and an average low-temperature of 6.4°C (43.5°F), August is the warmest month. Weather in August »

September, the first month of the autumn, in Sion, is also a fresh month, with average temperature varying between 3.3°C (37.9°F) and 12.3°C (54.1°F). In Sion, the average high-temperature marginally drops, from a comfortable 16.7°C (62.1°F) in August, to a fresh 12.3°C (54.1°F). Weather in September »

October, the same as September, in Sion, Switzerland, is another chilly autumn month, with average temperature fluctuating between -0.2°C (31.6°F) and 8.3°C (46.9°F). In October, the average high-temperature marginally drops, from a fresh 12.3°C (54.1°F) in September, to a chilly 8.3°C (46.9°F). Weather in October »

The last month of the autumn, November, is another cold month in Sion, Switzerland, with average temperature varying between 2.5°C (36.5°F) and -4.5°C (23.9°F). In November, the average high-temperature drops, from a frosty 8.3°C (46.9°F) in October, to a wintry 2.5°C (36.5°F). Weather in November »

December, the first month of the winter, in Sion, is also a subzero cold month, with average temperature ranging between max -1.2°C (29.8°F) and min -9.5°C (14.9°F). In December, the average high-temperature marginally drops, from a wintry 2.5°C (36.5°F) in November, to a freezing cold -1.2°C (29.8°F). Weather in December »

What is the coldest month in Sion?

The coldest month is January, with an average high-temperature of -2.5°C (27.5°F) and an average low-temperature of -11°C (12.2°F).

How much does it rain in Sion?

In Sion, Switzerland, during the entire year, the rain falls for 233.7 days and collects up to 1378mm (54.25") of precipitation.

When does it snow in Sion?

Months with snowfall are January through May, September through December.

How much does it snow in Sion?

In Sion, during the entire year, snow falls for 40.9 days, and aggregates up to 716mm (28.19") of snow.

What is the month with the least sunshine in Sion?

With an average of 4.7h of sunshine, January has the least sunshine of the year in Sion, Switzerland.

What is the month with the lowest UV index in Sion?

Months with the lowest UV index in Sion, Switzerland, are January and November, with an average maximum UV index of 1.

When does it snow the most in Sion?

February is the month with the most snowfall in Sion. Snow falls for 10.2 days and accumulates 167mm (6.57") of snow.

What is the most humid month in Sion?

The most humid month is March, with an average relative humidity of 90%.

What is the rainiest month in Sion?

The month with the most rainfall in Sion is May when the rain falls for 25.8 days and typically aggregates up to 177mm (6.97") of precipitation.

When it does not snow in Sion?

June through August are months without snowfall in Sion.

When are the longest days in Sion?

The month with the longest days in Sion is June, with an average of 15.7h of daylight.

What are the months with the highest UV index in Sion?

June and July, with an average maximum UV index of 4, are months with the highest UV index.

What is the least humid month in Sion?

Months with the lowest humidity in Sion are July and August, with an average relative humidity of 79%.

What is the month with the most sunshine in Sion?

July and August, with an average of 9.8h of sunshine, are months with the most sunshine in Sion, Switzerland.

What is the warmest month in Sion?

August is the warmest month in Sion, with an average high-temperature of 16.7°C (62.1°F) and an average low-temperature of 6.4°C (43.5°F).

What is the driest month in Sion?

The month with the least rainfall is September when the rain falls for 20.2 days and typically collects 76mm (2.99") of precipitation.

What is the month with the shortest days in Sion?

December has the shortest days of the year in Sion, Switzerland, with an average of 8.7h of daylight.
Average temperature - Sion, Switzerland
Average humidity - Sion, Switzerland
Average rainfall - Sion, Switzerland
Average rainfall days - Sion, Switzerland

The month with the highest number of rainy days is May (25.8 days).
The month with the least rainy days is February (13.8 days).

Average snowfall - Sion, Switzerland
Average snowfall days - Sion, Switzerland

The month with the highest number of snowfall days is February (10.2 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine - Sion, Switzerland

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

Months with the most sunshine are July and August (Average sunshine: 9.8h).
The month with the least sunshine is January (Average sunshine: 4.7h).