Grenchen Weather in September
Grenchen in September
The short of it: Grenchen in September averages a high of 20 °C (67 °F) and a low of 10 °C (50 °F), with 86 mm (3.4 in) of rain and about 12 h 29 min of daylight. Rated 3 of 5 for a visit; the best months are June and August. Source: TerraClimate climate normals, 1991–2020.
Average high 20° · low 10° · rain 86 mm · daylight 12 h 29 min
✦✦✦ Fair for a visit · best months: June & August
September in Grenchen brings afternoons near 20° and nights around 10°, with about 86 mm of rain over the month. Highs fall 5° against August, to near 20°; nights run about 10°. Wet spells are common — about 86 mm, the 5th wettest month.
The sun is up for about 12 h 29 min in mid-September, 104 minutes less than a month before.
For the traveller: pack layers, a wool coat and stout boots, and an oilskin besides. The Almanac rates September 3 of 5 for a visit; the finest months here are June and August.
Against its neighbours, Grenchen runs warmer than most and drier than most in September. Solothurn, 11 km to the E, sees much the same highs.
September in Grenchen, by the numbers
- Warmth rank
- 4th warmest of 12
- Rain rank
- 5th wettest of 12
- Versus August
- 5° colder, 11 mm less rain
- Versus October
- 5° warmer
- Day–night spread
- 10°
- Snow season
- Dec–Feb
- Daylight, mid-month
- 12 h 29 min
- Average wind
- 6 km/h
Neighbouring Towns
September averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| SolothurnSolothurn | 11 km E | 20° | 10° | 87 mm |
| Biel/BienneBern | 13 km WSW | 19° | 9° | 92 mm |
| DelémontJura | 20 km NNW | 20° | 10° | 79 mm |
| BurgdorfBern | 23 km SE | 19° | 9° | 96 mm |
| BernBern | 27 km S | 19° | 10° | 93 mm |
| KönizBern | 30 km S | 19° | 9° | 92 mm |
| MuriBern | 30 km SSE | 20° | 10° | 93 mm |
| LangenthalBern | 30 km E | 19° | 10° | 91 mm |