Sem Weather in September
Sem in September
The short of it: Sem in September averages a high of 16 °C (61 °F) and a low of 10 °C (50 °F), with 99 mm (3.9 in) of rain and about 12 h 43 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 99 mm · daylight 12 h 43 min
✦✦✦ Fair for a visit · best months: April & July
September in Sem brings afternoons near 16° and nights around 10°, with about 99 mm of rain over the month. The year turns hard here: highs drop 4° from August to about 16°, with nights near 10°. Wet spells are common — about 99 mm, the 3rd wettest month.
The sun is up for about 12 h 43 min in mid-September, 167 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, Sem runs warmer than most and wetter than most in September. Tønsberg, 5 km to the ESE, sees much the same highs.
September in Sem, by the numbers
- Warmth rank
- 4th warmest of 12
- Rain rank
- 3rd wettest of 12
- Versus August
- 4° colder, 3.0 mm more rain
- Versus October
- 6° warmer
- Day–night spread
- 7°
- Snow season
- Nov–Mar
- Daylight, mid-month
- 12 h 43 min
- Average wind
- 15 km/h
Neighbouring Towns
September averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| TønsbergVestfold | 5 km ESE | 16° | 10° | 93 mm |
| MelsomvikVestfold | 6 km S | 16° | 10° | 95 mm |
| StokkeVestfold | 7 km SSW | 16° | 10° | 100 mm |
| ÅsgårdstrandVestfold | 11 km NE | 16° | 9° | 89 mm |
| HortenVestfold | 17 km NNE | 16° | 10° | 88 mm |
| SandefjordVestfold | 18 km SSW | 16° | 10° | 108 mm |
| TjømeVestfold | 19 km S | 16° | 11° | 88 mm |
| HolmestrandVestfold | 23 km N | 16° | 9° | 97 mm |