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Iceland weather

Weather in Grundarfjörður for September 2025

Your guide to Grundarfjörður weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Grundarfjörður has been nearly identical to the historical average, with a temperature of 9.5 °C (showing only a slight deviation of 0.3 °C).

  • The forecast for the next days in Grundarfjörður predicts temperatures to be around 8 °C, close to the historical average.

  • In general, the average temperature in Grundarfjörður at the beginning of September is 10 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 6 °C by the end of September.

    • Rain 🌧️

  • The climate of Grundarfjörður in September is notably wet, with an average of 13 rainy days, and a total of 111.3 mm of precipitation.

Average dry days
17
Dry days
Average rainy days
13
Rainy days
Average snowy days
0
Snow days
Average temperatures
7°/4°
Temperatures
Average wind speed
25 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Grundarfjörður Weather September

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

Temperatures trend during September in Grundarfjörður

See the weather trend as well as the moving average line

September weather in Grundarfjörður day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Heavy rain at times
Heavy rain at times
 11° /8° 3.9 mm 3
2 Sept. Heavy rain at times
Heavy rain at times
 10° /8° 3.5 mm 3
3 Sept. Cloudy
Cloudy
 9° /7° 0 mm 2
4 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /6° 12.3 mm 3
5 Sept. Moderate rain at times
Moderate rain at times
 11° /7° 14.1 mm 3
6 Sept. Moderate rain at times
Moderate rain at times
 10° /7° 5.4 mm 3
7 Sept. Overcast
Overcast
 9° /6° 5 mm 3
8 Sept. Moderate rain at times
Moderate rain at times
 8° /4° 7.3 mm 2
9 Sept. Patchy rain possible
Patchy rain possible
 7° /5° 0.6 mm 2
10 Sept. Overcast
Overcast
 8° /6° 4.1 mm 3
11 Sept. Sunny
Sunny
 9° /6° 0.6 mm 3
12 Sept. Patchy rain possible
Patchy rain possible
 8° /5° 1.6 mm 2
13 Sept. Patchy rain possible
Patchy rain possible
 9° /4° 0.6 mm 0.1
14 Sept. Patchy rain possible
Patchy rain possible
 11° /6° 4.1 mm 0.1
15 Sept. Patchy rain possible
Patchy rain possible
 11° /9° 2 mm 0.3
16 Sept. Partly cloudy
Partly cloudy
 12° /8° 0 mm 0.3
17 Sept. Overcast
Overcast
 6° /5° 0 mm 0.2
18 Sept. Patchy rain possible
Patchy rain possible
 5° /4° 0.1 mm 1
19 Sept. Partly cloudy
Partly cloudy
 6° /2° 0 mm 2
20 Sept. Partly cloudy
Partly cloudy
 6° /3° 0 mm 2
21 Sept. Partly cloudy
Partly cloudy
 6° /4° 0 mm 3
22 Sept. Sunny
Sunny
 7° /4° 0 mm 3
23 Sept. Sunny
Sunny
 9° /4° 0 mm 3
24 Sept. Cloudy
Cloudy
 10° /8° 0 mm 2
25 Sept. Patchy rain possible
Patchy rain possible
 8° /6° 3.7 mm 2
26 Sept. Patchy rain possible
Patchy rain possible
 8° /4° 0.6 mm 2
27 Sept. Patchy rain possible
Patchy rain possible
 4° /2° 1.5 mm 1
28 Sept. Moderate rain at times
Moderate rain at times
 4° /1° 7.7 mm 1
29 Sept. Moderate rain at times
Moderate rain at times
 5° /3° 6.4 mm 2
30 Sept. Patchy rain possible
Patchy rain possible
 3° /2° 0 mm 1
Next
Important Notice
Our weather forecast for Grundarfjörður 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 Grundarfjörður forecast closer to your planned date for the most up-to-date weather information.
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Grundarfjörður in September - FAQ

What are the expected maximum and minimum temperatures in Grundarfjörður during September?
Prepare for cooler days with highs just around 7° and colder nights, dipping below 4°.
How much rainfall should be expected in Grundarfjörður during September?
Significant rainfall exceeding 111.3 mm is expected in Grundarfjörður during September, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Grundarfjörður in September 2025?
Grundarfjörður typically sees 0 cm of snowfall during September.
What are the typical wind conditions in Grundarfjörður during September?
The average wind speed in Grundarfjörður during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Grundarfjörður

Explore the daily rainfall trends and prepare for Grundarfjörðurs September weather 💧

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Location coordinates Where is Grundarfjörður?

Get accurate weather forecasts for Grundarfjörður, located at latitude 64.924 and longitude -23.263. Stay updated with localized weather information tailored for Grundarfjörður.

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