Saint John Weather: August
 |
Average Day Temperature: | 74.3°F |
|
Average Night Temperature: | 60.5°F |
|
Sea Water Temperature: | 60.6°F |
|
Number of Sunny Days: | 9 days |
| Sunshine Hours: | 13.3 - 14.7 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 1.1 in | |
| detailed information | ||
forecast
| Saint John |
Temperature
| Saint John |
Air Temperature in August, °F
The highest day temperature in August 2025 was 78°F. The lowest night temperature was 49°F. The average values for day and night temperatures during August were 70.7°F и 55.0°F respectivly.
Saint John Water Sea Temperature in August, °F
The average sea surface temperature in August 2025 for Saint John was 60.5°F. The maximum and minimum values were 58.0°F and 63.0°F respectively.
Most of the days in August are gloomy but you can also expect sunny days.
Precipitation Totals in August, in
Precipitation total in August for Saint John is 1.1 in.
The average wind speed in August is 5.9 mph. It makes August the most windless month 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 August is 6.9 hours.
Saint John on the Weather Map
| Halifax |  |
+34 |
| Kingston |  |
+30 |
| Montreal |  |
+32 |
| Niagara Falls | |
+30 |
| Ottawa |  |
+26 |
| Prince Edward Island | |
+28 |
| Quebec |  |
+20 |
| Saint John | |
+30 |
| St. John's |  |
+26 |
| Sydney | |
+28 |
| Toronto | |
+28 |
| Vancouver |  |
+44 |
| Victoria |  |
+46 |
| Winnipeg | |
+4 |
| Yellowknife |  |
-16 |
| 1200 |  |
30°F | SW 12 mph |
| 1500 | |
32°F | SW 11 mph |
| 1800 | |
30°F | SW 9 mph |
| 2100 |  |
28°F | S 7 mph |
| 0000 | |
28°F | SE 7 mph |
| 0300 | |
26°F | SE 11 mph |
| 0600 |  |
24°F | SE 16 mph |
| 0900 |  |
24°F | SE 17 mph |