Capital Region (Reykjavík)
September
Weather in Capital Region for September 2026
Your guide to Capital Region weather in September - trends and predictions
Until now, September 2026 in Capital Region is slightly cooler than the historical average by 1.2 °C.
Expect cooler weather in the next days in Capital Region with the forecast suggesting a temperature of 8.8 °C, lower than the historical average.
In general, the average temperature in Capital Region at the beginning of September is 11.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 7.7 °C by the end of September.
Capital Region in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 142.6 mm.
Temperatures
Rain 🌧️
13
Dry days
17
Rainy days
0
Snow days
10°/6°
Temperatures
27 km/h
Avg max wind
78 %
Avg humidity
Capital Region Weather September
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What’s the Weather Like in Capital Region This September?
Discover the average temperatures and weather trends across Capital Region’s cities this September.
Temperatures trend during September in Capital Region
See the weather trend as well as the moving average line
September weather in Capital Region day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 12° /9° | 4.1 mm | 3 | |
| 2 Sept. | Patchy rain possible | 13° /8° | 3.9 mm | 3 | |
| 3 Sept. |  Moderate or heavy rain shower | 11° /7° | 3.9 mm | 3 | |
| 4 Sept. | Moderate rain at times | 11° /8° | 5 mm | 3 | |
| 5 Sept. | Moderate rain at times | 12° /8° | 4.1 mm | 3 | |
| 6 Sept. | Light rain shower | 12° /8° | 4.6 mm | 3 | |
| 7 Sept. | Patchy rain possible | 11° /7° | 5.5 mm | 3 | |
| 8 Sept. | Light rain shower | 11° /7° | 3.8 mm | 3 | |
| 9 Sept. | Light rain shower | 10° /7° | 8.3 mm | 2 | |
| 10 Sept. | Patchy rain possible | 10° /7° | 5.4 mm | 2 | |
| 11 Sept. | Patchy rain possible | 10° /6° | 1.6 mm | 2 | |
| 12 Sept. |  Sunny | 8° /6° | 0.3 mm | 1.9 | |
| 13 Sept. | Light rain shower | 11° /8° | 4.8 mm | 0.5 | |
| 14 Sept. | Light rain shower | 11° /8° | 5.9 mm | 0.6 | |
| 15 Sept. | Sunny | 9° /6° | 1.4 mm | 3 | |
| 16 Sept. | Patchy rain possible | 11° /8° | 32.7 mm | 3 | |
| 17 Sept. | Patchy rain possible | 9° /7° | 0.2 mm | 3 | |
| 18 Sept. |  Overcast | 9° /5° | 3 mm | 3 | |
| 19 Sept. | Patchy rain possible | 10° /7° | 2.8 mm | 2 | |
| 20 Sept. | Patchy rain possible | 8° /6° | 10.3 mm | 2 | |
| 21 Sept. | Patchy rain possible | 8° /5° | 0.2 mm | 3 | |
| 22 Sept. | Sunny | 9° /5° | 0 mm | 3 | |
| 23 Sept. | Sunny | 6° /4° | 0 mm | 3 | |
| 24 Sept. | Overcast | 6° /3° | 0 mm | 2 | |
| 25 Sept. | Sunny | 8° /4° | 0 mm | 3 | |
| 26 Sept. | Patchy rain possible | 8° /4° | 7.3 mm | 2 | |
| 27 Sept. |  Cloudy | 8° /4° | 2 mm | 2 | |
| 28 Sept. | Patchy rain possible | 8° /5° | 1.7 mm | 2 | |
| 29 Sept. | Moderate rain at times | 8° /5° | 10.5 mm | 2 | |
| 30 Sept. | Overcast | 8° /5° | 3.7 mm | 2 | |
| Next | |||||
Important Notice
Our weather forecast for Capital Region 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 Capital Region forecast closer to your planned date for the most up-to-date weather information.
Change Month
Capital Region in September - FAQ
What are the expected maximum and minimum temperatures in Capital Region during September?
During September, expect a variety of temperatures with highs around 10° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in Capital Region during September?
Significant rainfall exceeding 142.6 mm is expected in Capital Region during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Capital Region in September 2026?
Capital Region typically sees 0 cm of snowfall during September.
What are the typical wind conditions in Capital Region during September?
The average wind speed in Capital Region during September is 27 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Capital Region
Explore the daily rainfall trends and prepare for Capital Regions September weather 💧
Typically, Capital Region has 17 rainy days in September with a total of 142.6 mm of rainfall.
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Where is Capital Region?Get accurate weather forecasts for Capital Region, located at latitude 64.135 and longitude -21.895. Stay updated with localized weather information tailored for Capital Region.
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