Lillestrøm
September
Weather in Lillestrøm for September 2026
Your guide to Lillestrøm weather in September - trends and predictions
Until now, September 2026 in Lillestrøm is cooler than usual, with temperatures averaging 14.1 °C, this is 2.5 °C below the typical seasonal average.
The forecast for the next days in Lillestrøm predicts temperatures to be around 15 °C, close to the historical average.
In general, the average temperature in Lillestrøm at the beginning of September is 18.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.4 °C by the end of September.
The climate of Lillestrøm in September is notably wet, with an average of 11 rainy days, and a total of 98.8 mm of precipitation.
Temperatures
Rain 🌧️
19
Dry days
11
Rainy days
0
Snow days
16°/8°
Temperatures
12 km/h
Avg max wind
82 %
Avg humidity
Lillestrøm Weather September
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Temperatures trend during September in Lillestrøm
See the weather trend as well as the moving average line
September weather in Lillestrøm day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Cloudy | 19° /10° | 1.3 mm | 4 | |
| 2 Sept. | Cloudy | 17° /9° | 2.1 mm | 4 | |
| 3 Sept. |  Patchy rain possible | 16° /8° | 1.3 mm | 4 | |
| 4 Sept. | Light rain shower | 17° /10° | 4.2 mm | 4 | |
| 5 Sept. |  Sunny | 20° /10° | 0.6 mm | 4 | |
| 6 Sept. |  Overcast | 19° /10° | 1 mm | 4 | |
| 7 Sept. | Patchy rain possible | 20° /9° | 1.3 mm | 4 | |
| 8 Sept. | Patchy rain possible | 19° /10° | 0.5 mm | 4 | |
| 9 Sept. | Light rain shower | 17° /10° | 6 mm | 4 | |
| 10 Sept. | Light rain shower | 18° /8° | 2.3 mm | 4 | |
| 11 Sept. | Light rain shower | 15° /8° | 4.2 mm | 3 | |
| 12 Sept. |  Mist | 14° /7° | 3.6 mm | 3 | |
| 13 Sept. |  Partly cloudy | 15° /5° | 0.9 mm | 3 | |
| 14 Sept. | Overcast | 13° /5° | 5 mm | 3 | |
| 15 Sept. | Fog | 14° /7° | 5.9 mm | 3 | |
| 16 Sept. |  Moderate rain | 14° /8° | 11.3 mm | 3 | |
| 17 Sept. | Mist | 15° /6° | 0.4 mm | 3 | |
| 18 Sept. | Mist | 17° /6° | 7.2 mm | 4 | |
| 19 Sept. | Patchy rain possible | 16° /8° | 2.4 mm | 2 | |
| 20 Sept. | Overcast | 16° /6° | 0 mm | 1.2 | |
| 21 Sept. | Sunny | 16° /6° | 0 mm | 1.8 | |
| 22 Sept. | Sunny | 15° /5° | 0 mm | 4 | |
| 23 Sept. | Light rain shower | 13° /7° | 4.9 mm | 3 | |
| 24 Sept. | Cloudy | 13° /7° | 1.5 mm | 4 | |
| 25 Sept. | Sunny | 15° /5° | 0 mm | 4 | |
| 26 Sept. | Overcast | 13° /7° | 0 mm | 3 | |
| 27 Sept. | Overcast | 12° /7° | 0.1 mm | 3 | |
| 28 Sept. | Sunny | 13° /5° | 0 mm | 4 | |
| 29 Sept. | Sunny | 17° /9° | 0 mm | 5 | |
| 30 Sept. | Overcast | 18° /8° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Lillestrøm 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 Lillestrøm forecast closer to your planned date for the most up-to-date weather information.
Change Month
Lillestrøm in September - FAQ
What are the expected maximum and minimum temperatures in Lillestrøm during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Lillestrøm during September?
Moderate rainfall is anticipated in Lillestrøm during September, with a total of 98.8 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
Will it snow in Lillestrøm in September 2026?
Lillestrøm typically sees 0 cm of snowfall during September.
What are the typical wind conditions in Lillestrøm during September?
The average wind speed in Lillestrøm during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Lillestrøm
Explore the daily rainfall trends and prepare for Lillestrøms September weather 💧
Typically, Lillestrøm has 11 rainy days in September with a total of 98.8 mm of rainfall.
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