April weather forecast
Sion, Switzerland

Weather in April

April, like March, in Sion, Switzerland, is another cold spring month, with an average temperature varying between -3.2°C (26.2°F) and 5°C (41°F).

Temperature

In April, 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). In Sion, Switzerland, in April, the average low-temperature is -3.2°C (26.2°F).

Humidity

The average relative humidity in April is 87%.

Rainfall

In Sion, Switzerland, it is raining for 22.6 days, with typically 91mm (3.58") of accumulated precipitation. Throughout the year, there are 233.7 rainfall days, and 1378mm (54.25") of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. In Sion, Switzerland, in April, during 2.7 snowfall days, 40mm (1.57") of snow is typically accumulated. Throughout the year, in Sion, there are 40.9 snowfall days, and 716mm (28.19") of snow is accumulated.

Daylight

In April, the average length of the day is 13h and 35min.
On the first day of the month, sunrise is at 07:10 and sunset at 19:58. On the last day of April, in Sion, sunrise is at 06:18 and sunset at 20:37 CEST.

Sunshine

In April, the average sunshine in Sion, Switzerland, is 7.9h.

UV index

In April, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In April, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in April in Sion?

In April, the average high-temperature is 5°C (41°F), and the average low-temperature is -3.2°C (26.2°F).

What is the average humidity in April in Sion?

In April, the average relative humidity in Sion is 87%.

How much does it rain in Sion in April?

In Sion, in April, during 22.6 rainfall days, 91mm (3.58") of precipitation is typically accumulated.

How much does it snow in Sion in April?

In Sion, during April, snow falls for 2.7 days and regularly aggregates up to 40mm (1.57") of snow.

What is the average length of the day in April in Sion?

In Sion, Switzerland, the average day length in April is 13h and 35min.

When are sunrise and sunset in April in Sion?

In April, on the first day of the month, sunrise is at 07:10 and sunset at 19:58. On the last day of the month, in Sion, sunrise is at 06:18 and sunset at 20:37 CEST.

How many hours of sunshine does Sion have in April?

The average sunshine duration in April in Sion, Switzerland, is 7.9h.

What is the UV index reading in April in Sion?

In April, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Sion, Switzerland

Average temperature in April - Sion, Switzerland
  • Average high temperature in April: 5°C

The warmest month (with the highest average high temperature) is August (16.7°C).
The month with the lowest average high temperature is January (-2.5°C).

  • Average low temperature in April: -3.2°C

The month with the highest average low temperature is August (6.4°C).
The coldest months (with the lowest average low temperature) are January and February (-11°C).

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Average pressure in April
Sion, Switzerland

Average pressure in April - Sion, Switzerland
  • Average pressure in April: 1015.2mbar

The month with the highest atmospheric pressure is December (1020.9mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).

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Average wind speed in April
Sion, Switzerland

Average wind speed in April - Sion, Switzerland
  • Average wind speed in April: 7.4km/h

The windiest month (with the highest average wind speed) is December (8.3km/h).
The calmest month (with the lowest average wind speed) is August (6.2km/h).

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Average humidity in April
Sion, Switzerland

Average humidity in April - Sion, Switzerland
  • Average humidity in April: 87%

The month with the highest relative humidity is March (90%).
The months with the lowest relative humidity are July and August (79%).

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Average rainfall in April
Sion, Switzerland

Average rainfall in April - Sion, Switzerland
  • Average rainfall in April: 91mm

The wettest month (with the highest rainfall) is May (177mm).
The driest month (with the least rainfall) is September (76mm).

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Average rainfall days in April
Sion, Switzerland

Average rainfall days in April - Sion, Switzerland
  • Average rainfall days in April: 22.6 days

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).

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Average snowfall in April
Sion, Switzerland

Average snowfall in April - Sion, Switzerland
  • Average snowfall in April: 40mm

The month with the highest snowfall is February (167mm).
The months with the least snowfall are June, July and August (0mm).

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Average snowfall days in April
Sion, Switzerland

Average snowfall days in April - Sion, Switzerland
  • Average snowfall days in April: 2.7 days

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

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Average daylight in April /
Average sunshine in April
Sion, Switzerland

Average daylight in April / Average sunshine in April - Sion, Switzerland
  • Average daylight in April: 13h and 35min

The month with the longest days is June (Average daylight: 15h and 43min).
The month with the shortest days is December (Average daylight: 8h and 41min).

  • Average sunshine in April: 7h and 54min

The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in April
Sion, Switzerland

Average sunshine days in April - Sion, Switzerland
  • Average sunshine days in April: 4.6 days

The month with the most sunshine days is October (13.5 days).
The month with the least sunshine days is June (2.8 days).

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Average UV index in April
Sion, Switzerland

Average UV index in April - Sion, Switzerland
  • Average UV index in April: 2

The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January and November (UV index 1).

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Average cloud cover in April
Sion, Switzerland

Average cloud cover in April - Sion, Switzerland
  • Average cloud cover in April: 49

The months with the most cloud cover are February and March (Cloud cover 53).
The month with the least cloud cover is October (Cloud cover 37).

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Average visibility in April
Sion, Switzerland

Average visibility in April - Sion, Switzerland
  • Average visibility in April: 7km

The months with the highest visibility are June, July, August, October and November (8km).
The months with the lowest visibility are January, February and March (6km).

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