Measurements:
°C
°F
Rocky Harbour
28°F
NE 9 mph
Feels like: 18°F
Precip: 100%
World Resorts Canada Rocky Harbour Weather September Weather in Rocky Harbour

Rocky Harbour Weather: September

Average Day Temperature: 60.6°F
Average Night Temperature: 52.2°F
Sea Water Temperature: 61.7°F
Number of Sunny Days: 4 days
Sunshine Hours: 11.7 - 13.4 hours
Number of Rainy Days: 5 days
Precipitation Totals: 2.2 in

Air Temperature in September, °F

Select Year: 2025 2024 2023

The highest day temperature in September 2025 was 73°F. The lowest night temperature was 42°F. The average values for day and night temperatures during September were 57.4°F и 52.6°F respectivly.

Rocky Harbour Water Sea Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Rocky Harbour was 62.0°F. The maximum and minimum values were 58.8°F and 64.8°F respectively.

Sunny, Cloudy and Gloomy days

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

Precipitation Totals in September, in

Precipitation total in September for Rocky Harbour is 2.2 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 7.2 mph. This value is relatively stable throughout the year.

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 Rocky Harbour in September is 4.7 hours.

Best Time to Visit Rocky Harbour
The most sunny months:
August 6 days
May 5 days
July 5 days
The most warm months:
July 68.8 °F
August 68.6 °F
June 62.0 °F
Warmest sea temperature:
August 66.1 °F
September 61.7 °F
July 60.8 °F
The most cold months:
February 19.0 °F
January 21.7 °F
March 26.3 °F
The most rainy months:
November 6 days
July 5 days
June 5 days
The most windy months:
December 9 mph
November 8 mph
February 8 mph

Rocky Harbour on the Weather Map

24 Hours Weather Forecast
Rocky Harbour
Local time: 02:35
05 dec, friday
0300 28°F
NE
9 mph
0600 22°F
E
16 mph
0900 18°F
E
17 mph
1200 14°F
E
20 mph
1500 14°F
E
24 mph
1800 16°F
E
28 mph
2100 16°F
SE
29 mph
06 dec, saturday
0000 18°F
SE
25 mph