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Weather in Fredrikstad for September 2025

Your guide to Fredrikstad weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Flom - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Fredrikstad is slightly cooler than the historical average by -0.6 °C.

  • The forecast for the next days in Fredrikstad predicts a temperature of 13.6 °C, which is cooler than the historical average.

  • In general, the average temperature in Fredrikstad at the beginning of September is 19.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.7 °C by the end of September.

    • Rain 🌧️

  • Fredrikstad in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 61.9 mm.

Average dry days
13
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/11°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Fredrikstad Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Overcast
20°
2
Sunny
17°
3
Patchy rain possible
18°
4
Light rain shower
20°
5
Sunny
22°
6
Patchy rain possible
20°
7
Mist
20°
8
Cloudy
20°
9
Overcast
19°
10
Mist
19°
11
Light rain shower
17°
12
Cloudy
16°
13
Cloudy
16°
14
Overcast
15°
15
Overcast
15°
16
Weather Alert Heavy rain
15°
17
Weather Alert Sunny
17°
18
Partly cloudy
17°
19
Patchy rain possible
17°
20
Partly cloudy
15°
21
Patchy rain possible
13°
22
Patchy rain possible
9°
23
Patchy rain possible
11°
24
Patchy rain possible
14°
25
Patchy rain possible
12°
26
Partly cloudy
11°
27
Partly cloudy
12°
28
Patchy rain possible
14°
29
Light drizzle
12°
30
Partly cloudy
14°

Temperatures trend during September in Fredrikstad

See the weather trend as well as the moving average line

September weather in Fredrikstad day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
 20° /12° 2 mm 5
2 Sept. Sunny
Sunny
 17° /12° 1.9 mm 4
3 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 0.8 mm 4
4 Sept. Light rain shower
Light rain shower
 20° /14° 4.3 mm 5
5 Sept. Sunny
Sunny
 22° /14° 1.9 mm 6
6 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 0.2 mm 5
7 Sept. Mist
Mist
 20° /13° 0 mm 5
8 Sept. Cloudy
Cloudy
 20° /14° 0 mm 5
9 Sept. Overcast
Overcast
 19° /13° 3.1 mm 4
10 Sept. Mist
Mist
 19° /13° 3 mm 5
11 Sept. Light rain shower
Light rain shower
 17° /13° 6.1 mm 4
12 Sept. Cloudy
Cloudy
 16° /11° 4.8 mm 4
13 Sept. Cloudy
Cloudy
 16° /9° 3.5 mm 4
14 Sept. Overcast
Overcast
 15° /8° 5 mm 4
15 Sept. Overcast
Overcast
 15° /11° 0.4 mm 4
16 Sept. Heavy rain
Heavy rain
 15° /12° 20.3 mm 0.5
17 Sept. Sunny
Sunny
 17° /10° 0.1 mm 0.6
18 Sept. Partly cloudy
Partly cloudy
 17° /12° 0.1 mm 0.5
19 Sept. Patchy rain possible
Patchy rain possible
 17° /14° 3.1 mm 0.6
20 Sept. Partly cloudy
Partly cloudy
 15° /12° 0 mm 4
21 Sept. Patchy rain possible
Patchy rain possible
 13° /7° 2.3 mm 2
22 Sept. Patchy rain possible
Patchy rain possible
 9° /7° 0.1 mm 2
23 Sept. Patchy rain possible
Patchy rain possible
 11° /5° 0.3 mm 2
24 Sept. Patchy rain possible
Patchy rain possible
 14° /8° 0.2 mm 3
25 Sept. Patchy rain possible
Patchy rain possible
 12° /7° 0.5 mm 2
26 Sept. Partly cloudy
Partly cloudy
 11° /6° 0 mm 3
27 Sept. Partly cloudy
Partly cloudy
 12° /7° 0 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 14° /9° 0.3 mm 3
29 Sept. Light drizzle
Light drizzle
 12° /8° 0.7 mm 4
30 Sept. Partly cloudy
Partly cloudy
 14° /10° 1.9 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.
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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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Location coordinates Where is Fredrikstad?

Get accurate weather forecasts for Fredrikstad, located at latitude 59.218 and longitude 10.93. Stay updated with localized weather information tailored for Fredrikstad.

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