Longyearbyen
September
Weather in Longyearbyen for September 2026
Your guide to Longyearbyen weather in September - trends and predictions
Longyearbyen typically experiences moderate snowfall in September, with an average of 10 snowy days.
According to Longyearbyen snow forecast for September 2026, 4 snowy days are expected at the beginning of September. The first snowfall for September is expected in Tuesday, 1 September.The forecast for the first days of September 2026 in Longyearbyen predicts a temperature of 3.1 °C, which is slightly above the historical average.
In general, the average temperature in Longyearbyen at the beginning of September is 2.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of -0.9 °C by the end of September.
Snow Forecast ❄️
Temperatures
11
Dry days
9
Rainy days
10
Snow days
2°/0°
Temperatures
14 km/h
Avg max wind
84 %
Avg humidity
Longyearbyen Weather September
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Temperatures trend during September in Longyearbyen
See the weather trend as well as the moving average line
September weather in Longyearbyen day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Sept. |  Moderate or heavy snow showers | 3° /1° | 2.2 mm | 1.4 cm | |
| 2 Sept. |  Overcast | 3° /1° | 6 mm | 0 cm | |
| 3 Sept. | Overcast | 4° /2° | 1.6 mm | 0 cm | |
| 4 Sept. |  Light snow showers | 2° /1° | 2.5 mm | 1.6 cm | |
| 5 Sept. |  Cloudy | 1° /1° | 1.9 mm | 1.4 cm | |
| 6 Sept. | Overcast | 1° /-1° | 0.6 mm | 0.4 cm | |
| 7 Sept. |  Light freezing rain | 3° /1° | 3.6 mm | 0.1 cm | |
| 8 Sept. | Moderate or heavy snow showers | 4° /2° | 2.9 mm | 0.6 cm | |
| 9 Sept. | Overcast | 6° /3° | 0.1 mm | 0 cm | |
| 10 Sept. | Light snow showers | 4° /2° | 1.8 mm | 0.3 cm | |
| 11 Sept. | Moderate or heavy snow showers | 3° /1° | 1 mm | 0.8 cm | |
| 12 Sept. |  Partly cloudy | 4° /1° | 0.2 mm | 0 cm | |
| 13 Sept. |  Patchy rain possible | 3° /1° | 1.1 mm | 0 cm | |
| 14 Sept. | Overcast | 3° /1° | 1.6 mm | 0 cm | |
| 15 Sept. | Overcast | 3° /1° | 1.9 mm | 0 cm | |
| 16 Sept. | Moderate or heavy snow showers | 2° /0° | 1.9 mm | 0.8 cm | |
| 17 Sept. | Light snow showers | 1° /-2° | 0.2 mm | 0.1 cm | |
| 18 Sept. | Partly cloudy | 1° /-2° | 0.1 mm | 0 cm | |
| 19 Sept. | Partly cloudy | 0° /-4° | 0.4 mm | 0 cm | |
| 20 Sept. | Overcast | -1° /-5° | 0 mm | 0 cm | |
| 21 Sept. | Light freezing rain | -1° /-4° | 0.3 mm | 0.2 cm | |
| 22 Sept. | Light freezing rain | -2° /-5° | 0.1 mm | 0 cm | |
| 23 Sept. |  Sunny | -2° /-5° | 0 mm | 0 cm | |
| 24 Sept. |  Moderate snow | -2° /-5° | 1.3 mm | 1 cm | |
| 25 Sept. | Partly cloudy | -4° /-6° | 0 mm | 0 cm | |
| 26 Sept. | Sunny | -1° /-5° | 1.3 mm | 0.2 cm | |
| 27 Sept. | Partly cloudy | -1° /-4° | 1.7 mm | 0 cm | |
| 28 Sept. | Moderate snow | 2° /-4° | 7.2 mm | 0.6 cm | |
| 29 Sept. |  Heavy snow | 1° /-1° | 2.8 mm | 2.2 cm | |
| 30 Sept. | Partly cloudy | -1° /-4° | 1.1 mm | 0.9 cm | |
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Important Notice
Our weather forecast for Longyearbyen 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 Longyearbyen forecast closer to your planned date for the most up-to-date weather information.
Change Month
Longyearbyen in September - FAQ
What are the expected maximum and minimum temperatures in Longyearbyen during September?
Brace for cold days with temperatures not exceeding 2° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Longyearbyen during September?
In September, Longyearbyen can expect light to moderate rainfall, totaling 44.2 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
Will it snow in Longyearbyen in September 2026?
Longyearbyen experiences an average snowfall of 7.7 cm during September, occurring over 10 days.
What are the typical wind conditions in Longyearbyen during September?
The average wind speed in Longyearbyen during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
Longyearbyen snow forecast September 2026
Track daily snowfall levels and discover Longyearbyen’s snowy potential this September ❄️
On average, Longyearbyen sees 10 snowy days during September, with approximately 7.7 cm of total snowfall.
September rainfall patterns in Longyearbyen
Explore the daily rainfall trends and prepare for Longyearbyens September weather 💧
Typically, Longyearbyen has 9 rainy days in September with a total of 44.2 mm of rainfall.
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Where is Longyearbyen?Get accurate weather forecasts for Longyearbyen, located at latitude 78.223 and longitude 15.647. Stay updated with localized weather information tailored for Longyearbyen.
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