Fredrikstad
September
Weather in Fredrikstad for September 2025
Your guide to Fredrikstad weather in September - trends and predictions
In general, the average temperature in Fredrikstad at the beginning of September is 20.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.7 °C by the end of September.
Fredrikstad in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 61.9 mm.
Temperatures
Rain 🌧️
13
Dry days
17
Rainy days
0
Snow days
17°/11°
Temperatures
20 km/h
Avg max wind
79 %
Avg humidity
Fredrikstad in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2  17° | 3  18° | 4 22° | 5 24° | 6 22° | 7  21° |
| 8  20° | 9 18° | 10 18° | 11 16° | 12  17° | 13 16° | 14 15° |
| 15 15° | 16  16° | 17 16° | 18 18° | 19 17° | 20 17° | 21 17° |
| 22 16° | 23 16° | 24 15° | 25 15° | 26 14° | 27  12° | 28 14° |
| 29 12° | 30 14° |
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Temperatures trend during September in Fredrikstad
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 19° /12° | 0 mm | 5 | |
| 2 Sept. | Sunny | 17° /11° | 2.8 mm | 4 | |
| 3 Sept. | Patchy rain possible | 18° /12° | 0.3 mm | 4 | |
| 4 Sept. | Sunny | 22° /14° | 2 mm | 6 | |
| 5 Sept. | Sunny | 24° /14° | 0 mm | 7 | |
| 6 Sept. | Patchy rain possible | 22° /13° | 0.1 mm | 5 | |
| 7 Sept. | Mist | 21° /13° | 0 mm | 5 | |
| 8 Sept. | Partly cloudy | 20° /15° | 0 mm | 5 | |
| 9 Sept. | Overcast | 18° /14° | 4.3 mm | 4 | |
| 10 Sept. | Mist | 18° /13° | 4.2 mm | 5 | |
| 11 Sept. | Light rain shower | 16° /13° | 4.7 mm | 4 | |
| 12 Sept. | Cloudy | 17° /11° | 1.3 mm | 4 | |
| 13 Sept. | Cloudy | 16° /8° | 0 mm | 4 | |
| 14 Sept. | Overcast | 15° /6° | 0 mm | 5 | |
| 15 Sept. | Overcast | 15° /11° | 0.4 mm | 4 | |
| 16 Sept. | Light drizzle | 16° /10° | 1.4 mm | 4 | |
| 17 Sept. | Partly cloudy | 16° /9° | 0 mm | 5 | |
| 18 Sept. | Light rain shower | 18° /11° | 3.5 mm | 5 | |
| 19 Sept. | Light rain shower | 17° /11° | 4.8 mm | 5 | |
| 20 Sept. | Light rain shower | 17° /11° | 1.2 mm | 5 | |
| 21 Sept. | Light drizzle | 17° /14° | 1.2 mm | 5 | |
| 22 Sept. | Light rain shower | 16° /12° | 8.6 mm | 4 | |
| 23 Sept. | Patchy rain possible | 16° /11° | 1.1 mm | 4 | |
| 24 Sept. | Overcast | 15° /10° | 6 mm | 4 | |
| 25 Sept. | Light rain | 15° /13° | 3.2 mm | 4 | |
| 26 Sept. | Patchy rain possible | 14° /10° | 0.2 mm | 4 | |
| 27 Sept. | Moderate or heavy rain with thunder | 12° /9° | 7.5 mm | 3 | |
| 28 Sept. | Patchy rain possible | 14° /8° | 0.7 mm | 4 | |
| 29 Sept. | Light drizzle | 12° /8° | 0.7 mm | 4 | |
| 30 Sept. | Partly cloudy | 14° /10° | 1.9 mm | 4 | |
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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.
Fredrikstad in September - FAQ
What are the expected maximum and minimum temperatures in Fredrikstad during September?
Enjoy moderate daytime temperatures of up to 17° 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 61.9 mm spread over approximately 17 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 💧
UV exposure in Fredrikstad during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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