Perth Weather in September
Perth in September
The short of it: Perth in September averages a high of 21 °C (71 °F) and a low of 10 °C (50 °F), with 88 mm (3.5 in) of rain and about 12 h 27 min of daylight. Rated 3 of 5 for a visit; the best months are June and September. Source: TerraClimate climate normals, 1991–2020.
Average high 21° · low 10° · rain 88 mm · daylight 12 h 27 min
✦✦✦ Fair for a visit · best months: June & September
September in Perth brings afternoons near 21° and nights around 10°, with about 88 mm of rain over the month. Much like August: highs about 21°, nights near 10°. Easy travelling weather. Wet spells are common — about 88 mm, the 4th wettest month.
The sun is up for about 12 h 27 min in mid-September, 96 minutes less than a month before.
For the traveller: pack light clothes and a jacket for the evening, and an oilskin besides. The Almanac rates September 3 of 5 for a visit; the finest months here are June and September.
Against its neighbours, Perth runs warmer than most and wetter than most in September. Smiths Falls, 18 km to the E, sees much the same highs.
September in Perth, by the numbers
- Warmth rank
- 4th warmest of 12
- Rain rank
- 4th wettest of 12
- Versus August
- 4° colder, 10 mm more rain
- Versus October
- 8° warmer
- Day–night spread
- 12°
- Snow season
- Nov–Apr
- Daylight, mid-month
- 12 h 27 min
- Average wind
- 11 km/h
Neighbouring Towns
September averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| Smiths FallsOntario | 18 km E | 21° | 10° | 87 mm |
| Carleton PlaceOntario | 27 km NNE | 21° | 10° | 83 mm |
| AlmonteOntario | 37 km N | 21° | 10° | 79 mm |
| Mississippi MillsOntario | 37 km N | 21° | 10° | 79 mm |
| StittsvilleOntario | 47 km NE | 22° | 10° | 84 mm |
| KanataOntario | 52 km NNE | 22° | 10° | 84 mm |
| Glen CairnOntario | 52 km NNE | 22° | 10° | 84 mm |
| BridlewoodOntario | 53 km NE | 22° | 10° | 83 mm |