Weather in Ottawa in september
Climate normals based on 10 years of historical data for Ottawa, Canada.
Average high
22°C
Average low
12°C
Rainfall
82 mm
9 rainy days
Sunshine
4.5h/day
Vochtigheid
75%
How Hot Is Ottawa in september?
Late summer in Ottawa: 22°C afternoons, 12°C cooler nights. Temperatures climb 3°C over August's averages in Ottawa.
Sunshine Hours in september
September delivers about 4.5h of sun in Ottawa — a mix of sunny stretches and cloudy ones.
Does It Rain In Ottawa In september?
Ottawa's September is moderately rainy — 82mm across 9 days.
Is Ottawa Humid In september?
Ottawa is sticky and humid throughout September: 75% humidity makes the heat feel relentless.
Wind In Ottawa In september
Light breezes typical: Ottawa averages 15 kph wind in September.
Cloud Cover In Ottawa In september
Ottawa's September runs cloudy: typical cloud cover of 56%.
Cities With Similar Weather In september
Weather in Ottawa, month by month
| Month | High / Low | Regen | |
|---|---|---|---|
| Weer in januari | -4°C / -13°C | 77mm | Details → |
| Weer in februari | -3°C / -13°C | 75mm | Details → |
| Weer in maart | 2°C / -7°C | 80mm | Details → |
| Weer in april | 10°C / 1°C | 110mm | Details → |
| Weer in mei | 19°C / 8°C | 90mm | Details → |
| Weer in juni | 23°C / 13°C | 119mm | Details → |
| Weer in juli | 26°C / 16°C | 121mm | Details → |
| Weer in augustus | 25°C / 16°C | 121mm | Details → |
| Weer in september | 22°C / 12°C | 82mm | |
| Weer in oktober | 14°C / 6°C | 111mm | Details → |
| Weer in november | 6°C / -1°C | 82mm | Details → |
| Weer in december | 0°C / -6°C | 97mm | Details → |