Sundsvall in September
6.5out of 10
Possible, with caveats
Cool: highs only around 14°C. Frequent rain: about 10 rainy days.
14°CAvg high
6°CAvg low
10Rainy days (55 mm)
12:34 hDaylight
06:28Sunrise · 19:02 Sunset
Why this score
- Cool: highs only around 14°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?
Rain in September varies a lot between years (±3.4 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 | -3°C | -9°C | 48 mm | 10 | – | – | 3.8 |
| February | -2°C | -9°C | 34 mm | 8 | – | – | 4.0 |
| March | 2°C | -6°C | 35 mm | 7 | – | – | 4.4 |
| April | 8°C | -2°C | 37 mm | 8 | – | – | 5.5 |
| May | 13°C | 3°C | 44 mm | 10 | – | – | 6.3 |
| June | 17°C | 8°C | 58 mm | 11 | – | – | 6.9 |
| July | 20°C | 11°C | 73 mm | 12 | – | – | 7.2 |
| August | 19°C | 10°C | 75 mm | 12 | – | – | 7.0 |
| September | 14°C | 6°C | 55 mm | 10 | – | – | 6.5 |
| October | 7°C | 1°C | 62 mm | 11 | – | – | 5.2 |
| November | 2°C | -3°C | 53 mm | 11 | – | – | 4.0 |
| December | -1°C | -7°C | 50 mm | 10 | – | – | 3.7 |
Frequently asked questions
How hot is Sundsvall in September?
Daytime highs average 14°C and nights about 6°C.
When is the best time to visit Sundsvall?
The best months are July, August, June.