Tromsø in September
4.7out of 10
Not the best time
Cool: highs only around 11°C. Very wet: about 17 rainy days.
11°CAvg high
5°CAvg low
17Rainy days (124 mm)
12:48 hDaylight
06:15Sunrise · 19:02 Sunset
Why this score
- Cool: highs only around 11°C
- Very wet: about 17 rainy days
- Rain varies a lot between years (±4.5 days)
What to wear and pack
- A warm jacket
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±4.5 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 | -4°C | -10°C | 105 mm | 15 | – | – | 3.0 |
| February | -4°C | -10°C | 93 mm | 14 | – | – | 3.2 |
| March | -1°C | -7°C | 102 mm | 16 | – | – | 2.9 |
| April | 3°C | -3°C | 85 mm | 15 | – | – | 3.7 |
| May | 8°C | 2°C | 91 mm | 16 | – | – | 4.6 |
| June | 12°C | 6°C | 92 mm | 15 | – | – | 5.4 |
| July | 15°C | 9°C | 90 mm | 14 | – | – | 6.1 |
| August | 14°C | 8°C | 102 mm | 15 | – | – | 5.7 |
| September | 11°C | 5°C | 124 mm | 17 | – | – | 4.7 |
| October | 4°C | 0°C | 128 mm | 17 | – | – | 3.6 |
| November | 0°C | -5°C | 95 mm | 15 | – | – | 3.0 |
| December | -2°C | -8°C | 103 mm | 15 | – | – | 2.9 |
Frequently asked questions
How hot is Tromsø in September?
Daytime highs average 11°C and nights about 5°C.
When is the best time to visit Tromsø?
The best months are July, August.