Tromsø
September
Weather in Tromsø for September 2025
Your guide to Tromsø weather in September - trends and predictions
In general, the average temperature in Tromsø at the beginning of September is 13.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 7.3 °C by the end of September.
Tromsø experiences an exceptionally high level of rainfall in September, with more than 20 rainy days on average.
Is September a good time to visit Tromsø? check out the best time to travel to Tromsø page.
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7
Dry days
23
Rainy days
0
Snow days
9°/5°
Temperatures
23 km/h
Avg max wind
83 %
Avg humidity
Tromsø in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  14° | 2  15° | 3 15° | 4  13° | 5 10° | 6 13° | 7 12° |
| 8  16° | 9 17° | 10 16° | 11 13° | 12  14° | 13  10° | 14  7° |
| 15  10° | 16 11° | 17 8° | 18 8° | 19 8° | 20 6° | 21 6° |
| 22 6° | 23 5° | 24 6° | 25 7° | 26 9° | 27 7° | 28 8° |
| 29 7° | 30 7° |
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Temperatures trend during September in Tromsø
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Sept. | Partly cloudy | 14° /9° | 0 mm | 0 cm | |
| 2 Sept. | Light rain shower | 15° /9° | 0.3 mm | 0 cm | |
| 3 Sept. | Light rain shower | 15° /8° | 5.4 mm | 0 cm | |
| 4 Sept. | Moderate or heavy rain shower | 13° /7° | 25.4 mm | 0 cm | |
| 5 Sept. | Light rain shower | 10° /8° | 23.1 mm | 0 cm | |
| 6 Sept. | Light rain shower | 13° /8° | 7.4 mm | 0 cm | |
| 7 Sept. | Patchy rain possible | 12° /9° | 2.6 mm | 0 cm | |
| 8 Sept. | Light rain | 16° /11° | 3.9 mm | 0 cm | |
| 9 Sept. | Patchy rain possible | 17° /12° | 4.3 mm | 0 cm | |
| 10 Sept. | Light rain shower | 16° /10° | 8.4 mm | 0 cm | |
| 11 Sept. | Light rain shower | 13° /9° | 6.9 mm | 0 cm | |
| 12 Sept. | Moderate rain | 14° /8° | 3.6 mm | 0 cm | |
| 13 Sept. | Overcast | 10° /5° | 0.5 mm | 0 cm | |
| 14 Sept. | Fog | 7° /4° | 0.1 mm | 0 cm | |
| 15 Sept. | Sunny | 10° /4° | 0 mm | 0 cm | |
| 16 Sept. | Partly cloudy | 11° /6° | 0.7 mm | 0 cm | |
| 17 Sept. | Light rain shower | 8° /4° | 5.9 mm | 0 cm | |
| 18 Sept. | Moderate rain | 8° /4° | 18.3 mm | 0 cm | |
| 19 Sept. | Patchy rain possible | 8° /3° | 3.5 mm | 0 cm | |
| 20 Sept. | Patchy rain possible | 6° /2° | 6.7 mm | 0 cm | |
| 21 Sept. | Overcast | 6° /1° | 7.4 mm | 0 cm | |
| 22 Sept. | Patchy rain possible | 6° /1° | 1.9 mm | 0 cm | |
| 23 Sept. | Light rain shower | 5° /2° | 8 mm | 0 cm | |
| 24 Sept. | Patchy rain possible | 6° /3° | 2.1 mm | 0 cm | |
| 25 Sept. | Light drizzle | 7° /2° | 5.2 mm | 0 cm | |
| 26 Sept. | Light rain shower | 9° /4° | 6.7 mm | 0 cm | |
| 27 Sept. | Light drizzle | 7° /4° | 2.8 mm | 0 cm | |
| 28 Sept. | Patchy rain possible | 8° /4° | 1.1 mm | 0 cm | |
| 29 Sept. | Light rain | 7° /4° | 13.2 mm | 5.7 cm | |
| 30 Sept. | Light rain | 7° /4° | 4.8 mm | 0.7 cm | |
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Important Notice
Our weather forecast for Tromsø in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Tromsø forecast closer to your planned date for the most up-to-date weather information.
Tromsø in September - FAQ
What are the expected maximum and minimum temperatures in Tromsø during September?
During September, expect a variety of temperatures with highs around 9° and lows near 5°, suitable for diverse activities and preferences.
How much rainfall should be expected in Tromsø during September?
Significant rainfall exceeding 252.8 mm is expected in Tromsø during September, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
Is snowfall common in Tromsø during September?
Tromsø experiences an average snowfall of 0 cm during September, occurring over 0 days, which may interest winter sports enthusiasts.
What are the typical wind conditions in Tromsø during September?
The average wind speed in Tromsø during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Tromsø in September?
As you prepare for your trip to Tromsø in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Tromsø, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
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