Saint Helier in September
6.9out of 10
Possible, with caveats
Mild: highs around 17°C. Frequent rain: about 11 rainy days.
17°CAvg high
15°CAvg low
11Rainy days (77 mm)
12:21 hDaylight
06:52Sunrise · 19:13 Sunset
Why this score
- Mild: highs around 17°C
- Frequent rain: about 11 rainy days
- Rain varies a lot between years (±5.0 days)
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±5.0 rainy days), so check the forecast closer to your trip. 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 | 9°C | 7°C | 111 mm | 16 | – | – | 4.7 |
| February | 9°C | 6°C | 81 mm | 13 | – | – | 5.2 |
| March | 9°C | 7°C | 69 mm | 12 | – | – | 5.4 |
| April | 11°C | 9°C | 57 mm | 10 | – | – | 5.9 |
| May | 13°C | 11°C | 53 mm | 10 | – | – | 6.4 |
| June | 16°C | 14°C | 50 mm | 9 | – | – | 6.9 |
| July | 18°C | 16°C | 47 mm | 9 | – | – | 7.2 |
| August | 18°C | 17°C | 63 mm | 10 | – | – | 7.2 |
| September | 17°C | 15°C | 77 mm | 11 | – | – | 6.9 |
| October | 15°C | 13°C | 122 mm | 16 | – | – | 5.7 |
| November | 12°C | 10°C | 132 mm | 18 | – | – | 5.0 |
| December | 10°C | 8°C | 138 mm | 17 | – | – | 4.7 |
Frequently asked questions
How hot is Saint Helier in September?
Daytime highs average 17°C and nights about 15°C.
When is the best time to visit Saint Helier?
The best months are July, August, June, September.