Alliston Weather in September
Alliston in September
The short of it: Alliston in September averages a high of 22 °C (72 °F) and a low of 10 °C (51 °F), with 74 mm (2.9 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 22° · low 10° · rain 74 mm · daylight 12 h 27 min
✦✦✦ Fair for a visit · best months: June & September
September in Alliston brings afternoons near 22° and nights around 10°, with about 74 mm of rain over the month. Much like August: highs about 22°, nights near 10°. Easy travelling weather. Wet spells are common — about 74 mm, the 5th wettest month.
The sun is up for about 12 h 27 min in mid-September, 94 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, Alliston runs warmer than most and drier than most in September. Innisfil, 24 km to the NE, is 1° cooler by day.
September in Alliston, by the numbers
- Warmth rank
- 4th warmest of 12
- Rain rank
- 5th wettest of 12
- Versus August
- 4° colder, 2.0 mm more rain
- Versus October
- 8° warmer
- Day–night spread
- 12°
- Snow season
- Nov–Apr
- Daylight, mid-month
- 12 h 27 min
- Average wind
- 12 km/h