Summerside Weather: September
 |
Average Day Temperature: | 65.8°F |
|
Average Night Temperature: | 58.7°F |
|
Sea Water Temperature: | 67.1°F |
|
Number of Sunny Days: | 10 days |
| Sunshine Hours: | 11.7 - 13.3 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.7 in | |
| detailed information | ||
forecast
| Summerside |
Temperature
| Summerside |
Air Temperature in September, °F
The highest day temperature in September 2025 was 74°F. The lowest night temperature was 44°F. The average values for day and night temperatures during September were 67.4°F и 56.8°F respectivly.
Summerside Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Summerside was 68.0°F. The maximum and minimum values were 62.6°F and 72.2°F respectively.
You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Summerside is 1.7 in. It makes september the most rainy month of the year.
The average wind speed in September is 12.7 mph.
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 Summerside in September is 6.4 hours.
Summerside on the Weather Map
| Halifax |  |
+6 |
| Kingston |  |
+4 |
| Moncton | |
-10 |
| Montreal | |
-2 |
| Niagara Falls | |
+10 |
| Ottawa | |
-6 |
| Prince Edward Island | |
+2 |
| Quebec | |
-12 |
| Rocky Harbour |  |
+22 |
| St. John's |  |
+36 |
| Sydney |  |
+16 |
| Toronto | |
+10 |
| Vancouver | |
+42 |
| Victoria | |
+44 |
| Winnipeg | |
+8 |
| 0600 |  |
2°F | SE 32 mph |
| 0900 |  |
2°F | SE 29 mph |
| 1200 | |
12°F | E 27 mph |
| 1500 | |
18°F | E 27 mph |
| 1800 |  |
20°F | E 25 mph |
| 2100 | |
16°F | E 22 mph |
| 0000 | |
16°F | E 21 mph |
| 0300 | |
16°F | E 18 mph |