Waterloo Weather in September
Waterloo in September
The short of it: Waterloo in September averages a high of 20 °C (67 °F) and a low of 11 °C (52 °F), with 61 mm (2.4 in) of rain and about 12 h 32 min of daylight. Rated 4 of 5 for a visit; the best months are June and September. Source: TerraClimate climate normals, 1991–2020.
Average high 20° · low 11° · rain 61 mm · daylight 12 h 32 min
✦✦✦✦ Recommended for a visit · best months: June & September
September in Waterloo brings afternoons near 20° and nights around 11°, with about 61 mm of rain over the month. Much like August: highs about 20°, nights near 11°. Easy travelling weather. Wet spells are common — about 61 mm, the 10th wettest month.
The sun is up for about 12 h 32 min in mid-September, 119 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 4 of 5 for a visit; the finest months here are June and September.
Against its neighbours, Waterloo runs cooler than most and wetter than most in September. Braine-l'Alleud, 4 km to the SSW, sees much the same highs.
September in Waterloo, by the numbers
- Warmth rank
- 4th warmest of 12
- Rain rank
- 10th wettest of 12
- Versus August
- 4° colder, 18 mm less rain
- Versus October
- 5° warmer
- Day–night spread
- 9°
- Snow season
- seldom any
- Daylight, mid-month
- 12 h 32 min
- Average wind
- 11 km/h
Neighbouring Towns
September averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| Braine-l'AlleudWallonia | 4 km SSW | 20° | 11° | 60 mm |
| UccleBrussels Capital | 11 km NNW | 20° | 11° | 62 mm |
| AuderghemBrussels Capital | 12 km NNE | 19° | 11° | 61 mm |
| HalleFlanders | 12 km W | 20° | 11° | 58 mm |
| ForestBrussels Capital | 12 km NNW | 20° | 11° | 61 mm |
| Saint-GillesBrussels Capital | 13 km NNW | 20° | 11° | 62 mm |
| EtterbeekBrussels Capital | 13 km N | 20° | 11° | 62 mm |
| IxellesBrussels Capital | 13 km N | 20° | 11° | 62 mm |