Saint John Weather: September
 |
Average Day Temperature: | 67.6°F |
|
Average Night Temperature: | 53.8°F |
|
Sea Water Temperature: | 59.1°F |
|
Number of Sunny Days: | 10 days |
| Sunshine Hours: | 11.8 - 13.3 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 1.2 in | |
| detailed information | ||
forecast
| Saint John |
Temperature
| Saint John |
Air Temperature in September, °F
The highest day temperature in September 2026 was 72°F. The lowest night temperature was 41°F. The average values for day and night temperatures during September were 64.5°F и 51.3°F respectivly.
Saint John Water Sea Temperature in September, °F
The average sea surface temperature in September 2026 for Saint John was 58.1°F. The maximum and minimum values were 56.6°F and 60.0°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 Saint John is 1.2 in.
The average wind speed in September is 6.8 mph. It makes September one of the most windless months of the year for Saint John.
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 Saint John in September is 6.3 hours.
Saint John on the Weather Map
| Halifax |  |
+56 |
| Moncton |  |
+52 |
| Montreal | |
+52 |
| Nanaimo | |
+54 |
| Niagara Falls | |
+64 |
| Ottawa | |
+54 |
| Prince Edward Island | |
+54 |
| Quebec | |
+50 |
| Saint Andrews | |
+56 |
| St. John's |  |
+40 |
| Sydney | |
+52 |
| Toronto | |
+72 |
| Vancouver | |
+58 |
| Victoria | |
+56 |
| Winnipeg | |
+52 |
| 2100 |  |
56°F | W 13 mph |
| 0000 | |
56°F | W 11 mph |
| 0300 | |
56°F | W 10 mph |
| 0600 |  |
58°F | W 9 mph |
| 0900 | |
58°F | W 9 mph |
| 1200 |  |
58°F | SW 7 mph |
| 1500 | |
60°F | SW 6 mph |
| 1800 | |
60°F | S 7 mph |