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Southern Peninsula (Keflavík)
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Iceland weather

Weather in Southern Peninsula for September 2026

Your guide to Southern Peninsula weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Southern Peninsula is slightly cooler than the historical average by 0.7 °C.

  • The forecast for the next days in Southern Peninsula predicts temperatures to be around 10 °C, close to the historical average.

  • In general, the average temperature in Southern Peninsula at the beginning of September is 10.7 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 9.3 °C by the end of September.

    • Rain 🌧️

  • Southern Peninsula experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 123.5 mm.

Average dry days
9
Dry days
Average rainy days
21
Rainy days
Average snowy days
0
Snow days
Average temperatures
9°/7°
Temperatures
Average wind speed
39 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Southern Peninsula Weather September

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

Temperatures trend during September in Southern Peninsula

See the weather trend as well as the moving average line

September weather in Southern Peninsula day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 11° /8° 2.5 mm 2
2 Sept. Patchy rain possible
Patchy rain possible
 11° /8° 2.1 mm 2
3 Sept. Patchy rain possible
Patchy rain possible
 10° /7° 4 mm 2
4 Sept. Light rain
Light rain
 10° /8° 3.5 mm 2
5 Sept. Light rain shower
Light rain shower
 11° /8° 3.4 mm 3
6 Sept. Light rain shower
Light rain shower
 11° /9° 4 mm 2
7 Sept. Moderate rain
Moderate rain
 11° /8° 8.3 mm 3
8 Sept. Light rain shower
Light rain shower
 11° /7° 6.9 mm 2
9 Sept. Light rain shower
Light rain shower
 9° /7° 2.4 mm 2
10 Sept. Overcast
Overcast
 10° /7° 8.3 mm 2
11 Sept. Cloudy
Cloudy
 9° /7° 2.8 mm 2
12 Sept. Patchy rain possible
Patchy rain possible
 9° /7° 0.2 mm 1.9
13 Sept. Patchy rain possible
Patchy rain possible
 10° /8° 8.1 mm 0.6
14 Sept. Sunny
Sunny
 10° /8° 0.2 mm 0.9
15 Sept. Sunny
Sunny
 10° /7° 0 mm 3
16 Sept. Patchy rain possible
Patchy rain possible
 11° /9° 27.6 mm 3
17 Sept. Patchy rain possible
Patchy rain possible
 10° /7° 0.1 mm 3
18 Sept. Light rain shower
Light rain shower
 10° /7° 15.2 mm 2
19 Sept. Patchy rain possible
Patchy rain possible
 9° /7° 1.8 mm 2
20 Sept. Patchy rain possible
Patchy rain possible
 8° /7° 1.7 mm 3
21 Sept. Light rain shower
Light rain shower
 10° /7° 7.1 mm 2
22 Sept. Patchy rain possible
Patchy rain possible
 9° /8° 11.5 mm 2
23 Sept. Patchy rain possible
Patchy rain possible
 8° /8° 3.4 mm 2
24 Sept. Light rain shower
Light rain shower
 10° /5° 29.8 mm 2
25 Sept. Patchy rain possible
Patchy rain possible
 10° /5° 1.4 mm 3
26 Sept. Light rain
Light rain
 9° /7° 11.8 mm 2
27 Sept. Light rain shower
Light rain shower
 9° /6° 3.2 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 9° /6° 1.1 mm 2
29 Sept. Partly cloudy
Partly cloudy
 9° /7° 7.2 mm 3
30 Sept. Light drizzle
Light drizzle
 9° /6° 3.8 mm 3
Next
Important Notice
Our weather forecast for Southern Peninsula 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 Southern Peninsula forecast closer to your planned date for the most up-to-date weather information.
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Southern Peninsula in September - FAQ

What are the expected maximum and minimum temperatures in Southern Peninsula during September?
During September, expect a variety of temperatures with highs around 9° and lows near 7°, suitable for diverse activities and preferences.

How much rainfall should be expected in Southern Peninsula during September?
Significant rainfall exceeding 123.5 mm is expected in Southern Peninsula during September, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Southern Peninsula in September 2026?
Southern Peninsula typically sees 0 cm of snowfall during September.

What are the typical wind conditions in Southern Peninsula during September?
The average wind speed in Southern Peninsula during September is 39 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Southern Peninsula

Explore the daily rainfall trends and prepare for Southern Peninsulas September weather 💧
Typically, Southern Peninsula has 21 rainy days in September with a total of 123.5 mm of rainfall.
Provinces in Southern Peninsula
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Reykjanesbær
Top locations in Southern Peninsula
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Keflavík
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Location coordinates Where is Southern Peninsula?

Get accurate weather forecasts for Southern Peninsula, located at latitude 64.005 and longitude -22.562. Stay updated with localized weather information tailored for Southern Peninsula.

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