Fredrikstad
September
Weather in Fredrikstad for September 2026
Your guide to Fredrikstad weather in September - trends and predictions
Until now, September 2026 in Fredrikstad is cooler than usual, with temperatures averaging 16.3 °C, this is 2.5 °C below the typical seasonal average.
Expect cooler weather in the next days in Fredrikstad with the forecast suggesting a temperature of 15.4 °C, lower than the historical average.
In general, the average temperature in Fredrikstad at the beginning of September is 19.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.9 °C by the end of September.
The climate of Fredrikstad in September is notably wet, with an average of 12 rainy days, and a total of 77.5 mm of precipitation.
Temperatures
Rain 🌧️
18
Dry days
12
Rainy days
0
Snow days
16°/11°
Temperatures
20 km/h
Avg max wind
79 %
Avg humidity
Fredrikstad Weather September
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Temperatures trend during September in Fredrikstad
See the weather trend as well as the moving average line
September weather in Fredrikstad day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 20° /12° | 1.5 mm | 5 | |
| 2 Sept. |  Sunny | 18° /12° | 1.4 mm | 4 | |
| 3 Sept. |  Patchy rain possible | 18° /11° | 0.6 mm | 4 | |
| 4 Sept. | Light rain shower | 19° /13° | 3.3 mm | 4 | |
| 5 Sept. | Sunny | 21° /12° | 2.1 mm | 5 | |
| 6 Sept. | Patchy rain possible | 20° /12° | 0.1 mm | 4 | |
| 7 Sept. |  Mist | 19° /13° | 1 mm | 4 | |
| 8 Sept. |  Cloudy | 19° /14° | 0.6 mm | 4 | |
| 9 Sept. | Overcast | 19° /12° | 2.7 mm | 4 | |
| 10 Sept. | Mist | 18° /11° | 2.3 mm | 4 | |
| 11 Sept. | Light rain shower | 16° /12° | 6.2 mm | 3 | |
| 12 Sept. | Cloudy | 16° /11° | 4.3 mm | 3 | |
| 13 Sept. | Sunny | 19° /12° | 0.4 mm | 2.5 | |
| 14 Sept. | Overcast | 15° /11° | 0.2 mm | 1.3 | |
| 15 Sept. | Light rain shower | 15° /12° | 17 mm | 0.5 | |
| 16 Sept. | Sunny | 16° /12° | 0.4 mm | 2.3 | |
| 17 Sept. | Overcast | 16° /9° | 0.2 mm | 4 | |
| 18 Sept. | Sunny | 16° /11° | 0 mm | 5 | |
| 19 Sept. | Patchy rain possible | 14° /12° | 22.3 mm | 3 | |
| 20 Sept. | Sunny | 16° /12° | 0 mm | 5 | |
| 21 Sept. | Patchy rain possible | 15° /12° | 15.7 mm | 3 | |
| 22 Sept. | Sunny | 15° /10° | 0 mm | 4 | |
| 23 Sept. | Light rain shower | 15° /10° | 13.9 mm | 3 | |
| 24 Sept. | Overcast | 15° /10° | 0 mm | 4 | |
| 25 Sept. | Patchy rain possible | 14° /11° | 2.8 mm | 3 | |
| 26 Sept. | Overcast | 14° /8° | 0 mm | 3 | |
| 27 Sept. |  Moderate or heavy rain with thunder | 13° /9° | 5 mm | 3 | |
| 28 Sept. | Patchy rain possible | 14° /8° | 0.5 mm | 4 | |
| 29 Sept. |  Light drizzle | 13° /8° | 0.7 mm | 3 | |
| 30 Sept. |  Partly cloudy | 14° /9° | 1.4 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Fredrikstad 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 Fredrikstad forecast closer to your planned date for the most up-to-date weather information.
Change Month
Fredrikstad in September - FAQ
What are the expected maximum and minimum temperatures in Fredrikstad during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Fredrikstad during September?
Moderate rainfall is anticipated in Fredrikstad during September, with a total of 77.5 mm spread over approximately 12 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Fredrikstad during September?
The average wind speed in Fredrikstad during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Fredrikstad
Explore the daily rainfall trends and prepare for Fredrikstads September weather 💧
Typically, Fredrikstad has 12 rainy days in September with a total of 77.5 mm of rainfall.
UV exposure in Fredrikstad during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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