St. John's in September
6.7out of 10
Possible, with caveats
Mild: highs around 16°C. Frequent rain: about 11 rainy days.
16°CAvg high
10°CAvg low
11Rainy days (92 mm)
12:19 hDaylight
06:45Sunrise · 19:05 Sunset
Why this score
- Mild: highs around 16°C
- Frequent rain: about 11 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 (2.5 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 | 0°C | -6°C | 125 mm | 14 | – | – | 3.0 |
| February | -1°C | -7°C | 103 mm | 13 | – | – | 3.3 |
| March | 1°C | -5°C | 105 mm | 13 | – | – | 3.4 |
| April | 5°C | -1°C | 86 mm | 13 | – | – | 4.4 |
| May | 9°C | 3°C | 73 mm | 11 | – | – | 5.5 |
| June | 13°C | 7°C | 66 mm | 10 | – | – | 6.3 |
| July | 18°C | 12°C | 78 mm | 10 | – | – | 7.1 |
| August | 19°C | 13°C | 80 mm | 10 | – | – | 7.3 |
| September | 16°C | 10°C | 92 mm | 11 | – | – | 6.7 |
| October | 11°C | 6°C | 106 mm | 13 | – | – | 5.5 |
| November | 7°C | 2°C | 110 mm | 14 | – | – | 4.6 |
| December | 2°C | -2°C | 126 mm | 15 | – | – | 3.4 |
Frequently asked questions
How hot is St. John's in September?
Daytime highs average 16°C and nights about 10°C.
When is the best time to visit St. John's?
The best months are August, July, September.