Onsala Weather in September
Onsala in September
The short of it: Onsala in September averages a high of 16 °C (61 °F) and a low of 10 °C (50 °F), with 73 mm (2.9 in) of rain and about 12 h 40 min of daylight. Rated 3 of 5 for a visit; the best months are April and July. Source: TerraClimate climate normals, 1991–2020.
Average high 16° · low 10° · rain 73 mm · daylight 12 h 40 min
✦✦✦ Fair for a visit · best months: April & July
September in Onsala brings afternoons near 16° and nights around 10°, with about 73 mm of rain over the month. Much like August: highs about 16°, nights near 10°. A wool coat will serve you well. Wet spells are common — about 73 mm, the 6th wettest month.
The sun is up for about 12 h 40 min in mid-September, 154 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 April and July.
Against its neighbours, Onsala runs cooler than most and drier than most in September. Vallda, 6 km to the NNW, sees much the same highs.
September in Onsala, by the numbers
- Warmth rank
- 4th warmest of 12
- Rain rank
- 6th wettest of 12
- Versus August
- 4° colder, 23 mm less rain
- Versus October
- 5° warmer
- Day–night spread
- 6°
- Snow season
- Dec–Mar
- Daylight, mid-month
- 12 h 40 min
- Average wind
- 20 km/h
Neighbouring Towns
September averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| ValldaHalland | 6 km NNW | 16° | 10° | 73 mm |
| KungsbackaHalland | 7 km NNE | 17° | 10° | 75 mm |
| Fjärås kyrkbyHalland | 10 km ENE | 16° | 10° | 81 mm |
| ÅsaHalland | 10 km SSE | 16° | 10° | 74 mm |
| SäröHalland | 11 km NNW | 17° | 10° | 70 mm |
| FrillesåsHalland | 15 km SE | 16° | 10° | 78 mm |
| LindomeVästra Götaland | 16 km NNE | 16° | 10° | 77 mm |
| BilldalVästra Götaland | 17 km NNW | 17° | 10° | 72 mm |