United States · 1991–2020 normal
Ottawa in
September.
Typical September weather in Ottawa: 25.3°C by day, 12.3°C at night, 85 mm of rain over 6.8 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high25.3°C
Typical low12.3°C
Rain85 mm
Wet days6.8
Comfort score 80 this month, the highest of the year. Daylight is calculated as 12 h 25 from latitude 41.35°.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4905006
- NOAA station
- USC00116526 · OTTAWA 4SW
- Station distance
- 5.9 km from the place centre
- Coverage
- Strong coverage · 29 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.