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Iceland weather

Weather in South for September 2025

Your guide to South weather in September - trends and predictions

    Temperatures

  • So far, September 2025 in South is slightly warmer than the historical average by 0.6 °C.

  • Expect cooler weather in the next days in South with the forecast suggesting a temperature of 8.8 °C, lower than the historical average.

  • In general, the average temperature in South at the beginning of September is 12.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 9 °C by the end of September.

    • Rain 🌧️

  • South in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 179.6 mm.

Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
9°/4°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
78 %
Avg humidity

South Weather September

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

What’s the Weather Like in South This September?

Discover the average temperatures and weather trends across South’s cities this September.
Patchy rain possibleVík í Mýrdal9 °C / 4 °CPatchy rain possibleHella9 °C / 5 °CMore Locations

Temperatures trend during September in South

See the weather trend as well as the moving average line

September weather in South day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Moderate rain
Moderate rain
 13° /9° 13.2 mm 3
2 Sept. Light rain shower
Light rain shower
 12° /8° 2.2 mm 3
3 Sept. Cloudy
Cloudy
 13° /8° 0 mm 3
4 Sept. Patchy rain possible
Patchy rain possible
 11° /7° 2.9 mm 3
5 Sept. Partly cloudy
Partly cloudy
 13° /5° 6.6 mm 4
6 Sept. Moderate rain
Moderate rain
 12° /5° 6.3 mm 3
7 Sept. Light rain shower
Light rain shower
 13° /6° 18.9 mm 3
8 Sept. Light rain shower
Light rain shower
 11° /7° 5.1 mm 3
9 Sept. Light rain shower
Light rain shower
 11° /4° 2.6 mm 3
10 Sept. Light rain shower
Light rain shower
 9° /5° 11.9 mm 2
11 Sept. Light rain shower
Light rain shower
 10° /5° 1.4 mm 3
12 Sept. Partly cloudy
Partly cloudy
 11° /3° 0.2 mm 3
13 Sept. Overcast
Overcast
 9° /3° 17.2 mm 2
14 Sept. Overcast
Overcast
 9° /4° 7 mm 3
15 Sept. Overcast
Overcast
 11° /4° 0.1 mm 3
16 Sept. Patchy rain possible
Patchy rain possible
 10° /7° 2.1 mm 0.2
17 Sept. Patchy rain possible
Patchy rain possible
 6° /4° 0.6 mm 0.3
18 Sept. Sunny
Sunny
 6° /2° 0 mm 0.4
19 Sept. Sunny
Sunny
 6° /2° 0 mm 0.4
20 Sept. Sunny
Sunny
 6° /2° 0 mm 0.3
21 Sept. Cloudy
Cloudy
 8° /4° 0 mm 2
22 Sept. Partly cloudy
Partly cloudy
 14° /9° 0 mm 4
23 Sept. Partly cloudy
Partly cloudy
 11° /8° 0 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 9° /7° 0.3 mm 2
25 Sept. Patchy rain possible
Patchy rain possible
 10° /8° 1.1 mm 2
26 Sept. Partly cloudy
Partly cloudy
 10° /8° 0.1 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 9° /7° 0.2 mm 2
28 Sept. Patchy rain possible
Patchy rain possible
 9° /7° 2 mm 2
29 Sept. Moderate rain
Moderate rain
 9° /7° 14.2 mm 2
30 Sept. Light drizzle
Light drizzle
 7° /1° 2.5 mm 2
Next
Important Notice
Our weather forecast for South 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 South forecast closer to your planned date for the most up-to-date weather information.
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South in September - FAQ

What are the expected maximum and minimum temperatures in South during September?
Prepare for cooler days with highs just around 9° and colder nights, dipping below 4°.
How much rainfall should be expected in South during September?
Significant rainfall exceeding 179.6 mm is expected in South during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
Will it snow in South in September 2025?
South typically sees 0 cm of snowfall during September.
What are the typical wind conditions in South during September?
The average wind speed in South during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in South

Explore the daily rainfall trends and prepare for Souths September weather 💧
Provinces in South
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MýrdalshreppurRangárþing Ytra
Top locations in South
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HellaVík í Mýrdal
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Location coordinates Where is South?

Get accurate weather forecasts for South, located at latitude 63.419 and longitude -19.01. Stay updated with localized weather information tailored for South.

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