Climate in Saint John: average temperature by month
In Saint John the warmest month is July, with 25.5 °C on average in the afternoon; the coolest is January, with -4.0 °C.
The average of the weather stations Woodstock (153 km) and Charlottetown A (253 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | -4.0 °C | -4.7 °C – -3.4 °C |
| February | -2.9 °C | -4.5 °C – -1.0 °C |
| March | 2.3 °C | -0.7 °C – 5.5 °C |
| April | 9.5 °C | 5.6 °C – 13.3 °C |
| May | 17.0 °C | 13.6 °C – 19.7 °C |
| June | 22.3 °C | 19.8 °C – 24.5 °C |
| July | 25.5 °C | 24.6 °C – 25.9 °C |
| August | 24.7 °C | 22.8 °C – 25.9 °C |
| September | 20.0 °C | 17.1 °C – 22.7 °C |
| October | 13.3 °C | 9.7 °C – 16.9 °C |
| November | 5.5 °C | 2.0 °C – 9.4 °C |
| December | -1.2 °C | -3.2 °C – 1.6 °C |