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 (Sunday 27 Sep) in Sion: mostly sunny, 14 to 28 °C, precipitation 0.0 mm (0 %), wind up to 15 km/h. Tomorrow: overcast, 16 to 30 °C.
| Day | Weather | Min | Max | Precip. | Wind |
|---|---|---|---|---|---|
| Today | mostly sunny | 14 °C | 28 °C | 0.0 mm | 15 km/h |
| Tomorrow | overcast | 16 °C | 30 °C | 0.0 mm | 18 km/h |
| Tue 29 Sep | overcast | 17 °C | 28 °C | 0.2 mm | 9 km/h |
| Wed 30 Sep | overcast | 17 °C | 23 °C | 0.0 mm | 9 km/h |
| Thu 1 Oct | light rain | 15 °C | 19 °C | 5.4 mm | 5 km/h |
| Fri 2 Oct | overcast | 16 °C | 24 °C | 0.0 mm | 7 km/h |
| Sat 3 Oct | overcast | 15 °C | 26 °C | 0.0 mm | 12 km/h |
No rain expected in Sion today or tomorrow. The 15-minute detail for the next two hours is shown on demand.
Sunday 27 Sep in Sion, hour by hour: sunny in the morning, sunny in the afternoon, sunny in the evening. Low 15 °C around 06:00, high 28 °C around 14:00. No rainy hour.
| Time | Weather | Temp. | Precip. | Wind |
|---|---|---|---|---|
| 00:00 | sunny | 16 °C | 0.0 mm | 5 km/h |
| 01:00 | sunny | 16 °C | 0.0 mm | 5 km/h |
| 02:00 | sunny | 16 °C | 0.0 mm | 5 km/h |
| 03:00 | sunny | 16 °C | 0.0 mm | 6 km/h |
| 04:00 | sunny | 15 °C | 0.0 mm | 6 km/h |
| 05:00 | sunny | 15 °C | 0.0 mm | 5 km/h |
| 06:00 | sunny | 15 °C | 0.0 mm | 6 km/h |
| 07:00 | sunny | 15 °C | 0.0 mm | 6 km/h |
| 08:00 | sunny | 15 °C | 0.0 mm | 6 km/h |
| 09:00 | sunny | 16 °C | 0.0 mm | 4 km/h |
| 10:00 | sunny | 19 °C | 0.0 mm | 2 km/h |
| 11:00 | sunny | 22 °C | 0.0 mm | 1 km/h |
| 12:00 | sunny | 25 °C | 0.0 mm | 2 km/h |
| 13:00 | sunny | 27 °C | 0.0 mm | 5 km/h |
| 14:00 | sunny | 28 °C | 0.0 mm | 10 km/h |
| 15:00 | sunny | 28 °C | 0.0 mm | 14 km/h |
| 16:00 | sunny | 28 °C | 0.0 mm | 15 km/h |
| 17:00 | sunny | 27 °C | 0.0 mm | 13 km/h |
| 18:00 | sunny | 25 °C | 0.0 mm | 6 km/h |
| 19:00 | sunny | 23 °C | 0.0 mm | 4 km/h |
| 20:00 | sunny | 21 °C | 0.0 mm | 5 km/h |
| 21:00 | sunny | 19 °C | 0.0 mm | 6 km/h |
| 22:00 | mostly sunny | 18 °C | 0.0 mm | 6 km/h |
| 23:00 | mostly sunny | 18 °C | 0.0 mm | 5 km/h |
Tomorrow, Monday 28 Sep, in Sion: overcast, 16 to 30 °C, wind up to 18 km/h. No precipitation expected.
This weekend in Sion: Saturday overcast, 15 to 26 °C; Sunday mostly sunny, 14 to 28 °C.
Yes: 1 day with precipitation is expected in Sion over the next 7 days, 5.6 mm in total. Wettest day: Thursday 1 Oct (5.4 mm).
The best day of the next 7 in Sion: Sunday 27 Sep, mostly sunny, up to 28 °C.
From 20 Sep to 26 Sep: 18.7 °C on average, 3.0 °C above the September normal (15.7 °C), 0 mm of precipitation (7-day normal: 9 mm). Warmest day: sunday 20 Sep (26 °C); coolest night: tuesday 22 Sep (11 °C).
| Day | Min | Max | Rain |
|---|---|---|---|
| Sun 20 Sep | 12 °C | 26 °C | 0.0 mm |
| Mon 21 Sep | 14 °C | 25 °C | 0.0 mm |
| Tue 22 Sep | 11 °C | 24 °C | 0.0 mm |
| Wed 23 Sep | 11 °C | 25 °C | 0.0 mm |
| Thu 24 Sep | 12 °C | 26 °C | 0.0 mm |
| Fri 25 Sep | 12 °C | 25 °C | 0.0 mm |
| Sat 26 Sep | 12 °C | 26 °C | 0.0 mm |
Open-Meteo analyses of the last 7 days (models and assimilated observations), MeteoSwiss 1991–2020 normals. Updated nightly.
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 |
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.