Measurements:
°C
°F
Ottawa
18°F
NW 4 mph
Feels like: 12°F
Precip: 0%
World Resorts USA Ottawa Weather September Weather in Ottawa

Ottawa Weather: September

Average Day Temperature: 81.0°F
Average Night Temperature: 60.9°F
Number of Sunny Days: 19 days
Sunshine Hours: 11.8 - 13.1 hours
Number of Rainy Days: 1 day
Precipitation Totals: 0.6 in

Air Temperature in September, °F

Select Year: 2024 2023 2022

The highest day temperature in September 2024 was 97°F. The lowest night temperature was 43°F. The average values for day and night temperatures during September were 83.7°F и 58.8°F respectivly.

Sunny, Cloudy and Gloomy days

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation Totals in September, in

Precipitation total in September for Ottawa is 0.6 in. It makes september one of the least rainy months of the year.

Wind Speed in September, mph

The average wind speed in September is 8.5 mph. It makes September one of the most windless months of the year for Ottawa.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Ottawa in September is 8.9 hours.

Best Time to Visit Ottawa
The most sunny months:
September 19 days
August 16 days
June 15 days
The most warm months:
August 84.9 °F
July 83.7 °F
June 81.8 °F
The most cold months:
January 27.2 °F
February 31.2 °F
December 37.3 °F
The most rainy months:
June 3 days
May 3 days
March 3 days
The most windy months:
March 11 mph
April 11 mph
November 10 mph

Ottawa on the Weather Map

USA Resorts:
NAME
Boston +10
Chicago +20
Hawaii +78
Honolulu +78
Houston +46
Las Vegas +50
Los Angeles +54
Miami +62
New York +16
Orlando +50
San Diego +54
San Francisco +54
Sarasota +48
Tampa +46
Washington +20
24 Hours Weather Forecast
Ottawa
Local time: 04:14
22 dec, sunday
0600 20°F
NW
6 mph
0900 24°F
NW
7 mph
1200 30°F
N
13 mph
1500 32°F
N
13 mph
1800 30°F
N
12 mph
2100 28°F
N
16 mph
23 dec, monday
0000 28°F
N
16 mph
0300 28°F
N
17 mph