Saint John in September
6.7out of 10
Possible, with caveats
Mild: highs around 16°C. Frequent rain: about 10 rainy days.
16°CAvg high
12°CAvg low
10Rainy days (108 mm)
12:18 hDaylight
07:10Sunrise · 19:28 Sunset
Why this score
- Mild: highs around 16°C
- Frequent rain: about 10 rainy days
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in September is fairly consistent from year to year (2.8 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -2°C | -9°C | 112 mm | 12 | – | – | 3.4 |
| February | -1°C | -8°C | 96 mm | 10 | – | – | 3.7 |
| March | 2°C | -4°C | 112 mm | 12 | – | – | 3.8 |
| April | 6°C | 1°C | 105 mm | 12 | – | – | 4.7 |
| May | 11°C | 6°C | 103 mm | 12 | – | – | 5.6 |
| June | 15°C | 11°C | 108 mm | 12 | – | – | 6.3 |
| July | 18°C | 14°C | 91 mm | 11 | – | – | 7.0 |
| August | 19°C | 15°C | 81 mm | 9 | – | – | 7.4 |
| September | 16°C | 12°C | 108 mm | 10 | – | – | 6.7 |
| October | 12°C | 7°C | 133 mm | 11 | – | – | 5.8 |
| November | 7°C | 2°C | 128 mm | 11 | – | – | 4.9 |
| December | 2°C | -4°C | 137 mm | 13 | – | – | 3.5 |
Frequently asked questions
How hot is Saint John in September?
Daytime highs average 16°C and nights about 12°C.
When is the best time to visit Saint John?
The best months are August, July.