Monthly climate guide
Alta weather in September
September in Alta is typically cool, with average daytime highs around 8°C (47°F) and night-time lows near 3°C (38°F). The month usually brings about 72 mm of rain (some rain) and is often cloudy. Daytime highs are 4°C cooler than August and 7°C warmer than October.
What stands out in September
- It cools down fast from here: October is about 7°C cooler.
- Just 170 km apart, but Alta runs about 2°C cooler than Tromsø this month.
- There's little difference between day and night (around 5°C).
- Seasonally, September counts as early autumn in Alta.
Avg high
8°C
47°F
Avg low
3°C
38°F
Rainfall
72 mm
some rain
Humidity
92%
relative
Sky
81%
cloud · often cloudy
Alta weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | -8°C / 18°F | -13°C / 8°F | 59 mm | 97% | 78% |
| February | -7°C / 20°F | -12°C / 10°F | 52 mm | 96% | 80% |
| March | -4°C / 25°F | -10°C / 14°F | 79 mm | 93% | 79% |
| April | -1°C / 31°F | -6°C / 21°F | 61 mm | 91% | 78% |
| May | 3°C / 38°F | -1°C / 30°F | 76 mm | 89% | 75% |
| June | 10°C / 49°F | 4°C / 39°F | 119 mm | 86% | 81% |
| July | 14°C / 57°F | 8°C / 46°F | 105 mm | 86% | 77% |
| August | 12°C / 54°F | 7°C / 44°F | 100 mm | 89% | 78% |
| September | 8°C / 47°F | 3°C / 38°F | 72 mm | 92% | 81% |
| October | 1°C / 34°F | -2°C / 28°F | 72 mm | 96% | 84% |
| November | -3°C / 27°F | -7°C / 19°F | 70 mm | 96% | 81% |
| December | -5°C / 23°F | -10°C / 14°F | 68 mm | 97% | 84% |
What to pack for September
- A proper insulated winter coat
- A hat, scarf and gloves
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Alta?
Compare the months in the chart above to find your ideal window.
Best time to visit Alta →Other Norway cities in September
Cite or embed this data
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Alta weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/norway/alta/september
<a href="https://weathercompare.eu/weather/norway/alta/september">Alta weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/norway/alta" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Alta weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/norway/alta/september">Alta weather in September</a> – WeatherCompare</p>
Alta in September: quick answers
Is September a good time to visit Alta?
Yes. September is one of the best months for Alta, with highs around 8°C and about 72 mm of rain.
How warm is Alta in September?
Average highs are about 8°C (47°F) and average lows about 3°C (38°F), based on 10 years of daily data.
Does it rain a lot in Alta in September?
Alta typically gets around 72 mm of rain in September — some rain.
Figures are long-term averages for the area around Alta (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.