Sion Weather in September
Sion in September
The short of it: Sion in September averages a high of 24 °C (74 °F) and a low of 7 °C (44 °F), with 24 mm (0.94 in) of rain and about 12 h 31 min of daylight. Rated 5 of 5 for a visit; the best months are September and April. Source: TerraClimate climate normals, 1991–2020.
Average high 24° · low 7° · rain 24 mm · daylight 12 h 31 min
✦✦✦✦✦ Recommended for a visit · best months: September & April
Thirty years of records give Sion an average September high of 24°, a low of 7° and some 24 mm of rain. The year turns hard here: highs drop 6° from August to about 24°, with nights near 7°. Rain is modest, about 24 mm, the 10th wettest month.
The sun is up for about 12 h 31 min in mid-September, 111 minutes less than a month before.
For the traveller: pack light clothes and a jacket for the evening. The Almanac rates September 5 of 5 for a visit; it is the best month of the year to come.
Against its neighbours, Sion runs warmer than most and wetter than most in September. Grand Forks, 4 km to the ENE, sees much the same highs.
September in Sion, by the numbers
- Warmth rank
- 4th warmest of 12
- Rain rank
- 10th wettest of 12
- Versus August
- 6° colder, 3.0 mm more rain
- Versus October
- 9° warmer
- Day–night spread
- 17°
- Snow season
- Nov–Mar
- Daylight, mid-month
- 12 h 31 min
- Average wind
- 8 km/h
Neighbouring Towns
September averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| Grand ForksBritish Columbia | 4 km ENE | 24° | 7° | 24 mm |
| GreenwoodBritish Columbia | 17 km WNW | 22° | 5° | 24 mm |
| MidwayBritish Columbia | 20 km W | 23° | 5° | 22 mm |
| Christina LakeBritish Columbia | 21 km E | 23° | 7° | 24 mm |
| RepublicWashington | 45 km SSW | 23° | 5° | 20 mm |
| RosslandBritish Columbia | 51 km E | 20° | 5° | 32 mm |
| WarfieldBritish Columbia | 55 km E | 22° | 7° | 31 mm |
| Kettle FallsWashington | 55 km SE | 25° | 7° | 21 mm |