Valais, 509 m · continuously updated
Temperature · last 4 and next 28 hours
Updated hourly.
Two-week trend.
Sunrise –, golden light until –
Sunset –, golden light from –
–
European index, measured continuously.
Daily maximum — protection advised from 3.
Snow settles about 300 m below it.
Neighbouring municipalities, as the crow flies.
Today (Saturday 14 Nov) in Sion: overcast, 3 to 12 °C, precipitation 0.0 mm (4 %), wind up to 7 km/h. Tomorrow: light rain, 6 to 11 °C.
| Day | Weather | Min | Max | Precip. | Wind |
|---|---|---|---|---|---|
| Today | overcast | 3 °C | 12 °C | 0.0 mm | 7 km/h |
| Tomorrow | light rain | 6 °C | 11 °C | 5.8 mm | 8 km/h |
| Mon 16 Nov | showers | 6 °C | 9 °C | 10.6 mm | 8 km/h |
| Tue 17 Nov | light rain | 7 °C | 10 °C | 12.0 mm | 9 km/h |
| Wed 18 Nov | rain | 5 °C | 9 °C | 21.5 mm | 11 km/h |
| Thu 19 Nov | showers | 6 °C | 11 °C | 12.2 mm | 7 km/h |
| Fri 20 Nov | snow showers | 1 °C | 7 °C | 8.9 mm | 11 km/h |
No rain expected today in Sion. Tomorrow: rain from 04:00 to 11:00. The 15-minute detail for the next two hours is shown on demand.
Saturday 14 Nov in Sion, hour by hour: sunny in the morning, sunny in the afternoon, overcast in the evening. Low 3 °C around 08:00, high 12 °C around 14:00. No rainy hour.
| Time | Weather | Temp. | Precip. | Wind |
|---|---|---|---|---|
| 00:00 | partly cloudy | 6 °C | 0.0 mm | 2 km/h |
| 01:00 | mostly sunny | 6 °C | 0.0 mm | 4 km/h |
| 02:00 | mostly sunny | 5 °C | 0.0 mm | 4 km/h |
| 03:00 | mostly sunny | 4 °C | 0.0 mm | 6 km/h |
| 04:00 | mostly sunny | 4 °C | 0.0 mm | 5 km/h |
| 05:00 | mostly sunny | 4 °C | 0.0 mm | 5 km/h |
| 06:00 | sunny | 3 °C | 0.0 mm | 6 km/h |
| 07:00 | sunny | 3 °C | 0.0 mm | 4 km/h |
| 08:00 | sunny | 3 °C | 0.0 mm | 6 km/h |
| 09:00 | sunny | 4 °C | 0.0 mm | 6 km/h |
| 10:00 | sunny | 6 °C | 0.0 mm | 4 km/h |
| 11:00 | sunny | 8 °C | 0.0 mm | 3 km/h |
| 12:00 | sunny | 10 °C | 0.0 mm | 2 km/h |
| 13:00 | sunny | 11 °C | 0.0 mm | 4 km/h |
| 14:00 | sunny | 12 °C | 0.0 mm | 2 km/h |
| 15:00 | sunny | 12 °C | 0.0 mm | 3 km/h |
| 16:00 | mostly sunny | 11 °C | 0.0 mm | 3 km/h |
| 17:00 | overcast | 9 °C | 0.0 mm | 6 km/h |
| 18:00 | overcast | 8 °C | 0.0 mm | 7 km/h |
| 19:00 | overcast | 8 °C | 0.0 mm | 7 km/h |
| 20:00 | overcast | 8 °C | 0.0 mm | 7 km/h |
| 21:00 | overcast | 7 °C | 0.0 mm | 7 km/h |
| 22:00 | overcast | 7 °C | 0.0 mm | 7 km/h |
| 23:00 | overcast | 7 °C | 0.0 mm | 7 km/h |
Today, Saturday 14 Nov in Sion: overcast, 3 to 12 °C, wind up to 7 km/h. No precipitation expected. That is 2.3 °C above the climate normal for November in Sion (5.1 °C average over 1991-2020).
Tomorrow, Sunday 15 Nov, in Sion: light rain, 6 to 11 °C, wind up to 8 km/h. Precipitation expected: 5.8 mm, 79 % probability.
Today in Sion (509 m): 3 to 12 °C. Tomorrow: 6 to 11 °C. Over the next 7 days, highs range from 7 to 12 °C, averaging 10 °C.
This weekend in Sion: Saturday overcast, 3 to 12 °C; Sunday light rain, 6 to 11 °C.
Yes: 6 days with precipitation are expected in Sion over the next 7 days, 71.0 mm in total. Wettest day: Wednesday 18 Nov (21.5 mm).
Today in Sion (509 m), the UV index peaks at 3 (low) around midday. No particular protection is needed. In the mountains, radiation rises by about 10 % per 1,000 m, and snow reflects up to 80 % of it.
The best day of the next 7 in Sion: Saturday 14 Nov, overcast, up to 12 °C.
In Sion (509 m), the mean annual temperature is 10.7 °C. The warmest month is July (20.5 °C on average) and the coldest January (0.6 °C). About 592 mm of precipitation falls per year, peaking in December (69 mm) with a minimum in April (34 mm). The sun shines for about 2137 hours a year, mostly in July (269 h). On average there are 90 frost days and 21 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 33.5 °C and the absolute minimum −8.9 °C.
Mean monthly precipitation (mm) — bar height relative to the wettest month.
| Month | Mean T | Abs. max | Abs. min | Precip. (mm) | Sunshine (h) | Frost days | Summer days |
|---|---|---|---|---|---|---|---|
| Jan | 0.6 °C | 11.4 °C | −8.9 °C | 53 | 90 | 24 | 0 |
| Feb | 2.3 °C | 15.1 °C | −7.5 °C | 42 | 130 | 20 | 0 |
| Mar | 7.1 °C | 20.8 °C | −3.7 °C | 38 | 188 | 9 | 0 |
| Apr | 11.1 °C | 24.7 °C | −0.4 °C | 34 | 209 | 1 | 2 |
| May | 15.1 °C | 29.0 °C | 3.6 °C | 53 | 225 | 0 | 8 |
| Jun | 18.8 °C | 32.4 °C | 7.2 °C | 49 | 251 | 0 | 17 |
| Jul | 20.5 °C | 33.5 °C | 9.5 °C | 62 | 269 | 0 | 22 |
| Aug | 19.8 °C | 32.9 °C | 8.6 °C | 60 | 248 | 0 | 20 |
| Sep | 15.7 °C | 27.7 °C | 5.2 °C | 38 | 208 | 0 | 7 |
| Oct | 10.8 °C | 23.2 °C | 0.2 °C | 43 | 159 | 2 | 0 |
| Nov | 5.1 °C | 18.0 °C | −4.9 °C | 51 | 94 | 11 | 0 |
| Dec | 1.1 °C | 11.9 °C | −8.4 °C | 69 | 66 | 23 | 0 |
| Year | 10.7 °C | 33.5 °C | −8.9 °C | 592 | 2137 | 90 | 77 |
Sion sits at around 509 m above sea level in the canton of Valais. This elevation directly affects temperatures, the rain-snow line and snow cover: on average, the temperature drops by about 0.55 °C per 100 m of altitude.
The warmest month in Sion is July, averaging 20.5 °C; the coldest is January, at 0.6 °C. The annual mean is 10.7 °C (MeteoSwiss 1991–2020 normals, reference station Sion).
Sion receives about 592 mm of precipitation a year, or 49 mm a month on average. The wettest month is December (69 mm) and the driest April (34 mm), according to the MeteoSwiss 1991–2020 normals.
Sion averages 90 frost days a year, most of them in January (24 days). Conversely, 77 summer days exceed 25 °C, 21 of them above 30 °C. Mean values from the MeteoSwiss 1991–2020 normals.
The sun shines for about 2137 hours a year in Sion. The sunniest month is July (269 h) and the least sunny December (66 h), according to the MeteoSwiss 1991–2020 normals.
In Sion, the monthly mean rises from 0.6 °C in January to 20.5 °C in July: a 19.9 °C gap between the coldest and the warmest month. Absolute extremes over 1991–2020 range from −8.9 °C to 33.5 °C.
For warmth and sunshine: July (20.5 °C on average, 269 h of sun). To avoid rain, April is the driest month (34 mm). The coldest month is January (0.6 °C).
Source: MeteoSwiss open data (1991–2020 normals) — stations Sion (2 km, 482 m), Montana (11 km, 1423 m), Les Diablerets (16 km, 2964 m), adjusted to the elevation of Sion (509 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.