Reykjavík
September
Weather in Reykjavík for September 2025
Your guide to Reykjavík weather in September - trends and predictions
Until now, September 2025 in Reykjavík has been nearly identical to the historical average, with a temperature of 11.1 °C (showing only a slight deviation of 0.1 °C).
Expect cooler weather in the next days in Reykjavík with the forecast suggesting a temperature of 9.9 °C, lower than the historical average.
In general, the average temperature in Reykjavík at the beginning of September is 11.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 10.4 °C by the end of September.
Reykjavík experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 133.7 mm.
Temperatures
Rain 🌧️
3
Dry days
27
Rainy days
0
Snow days
10°/6°
Temperatures
26 km/h
Avg max wind
78 %
Avg humidity
Reykjavík Weather September
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Temperatures trend during September in Reykjavík
See the weather trend as well as the moving average line
September weather in Reykjavík day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 12° /9° | 5 mm | 3 | |
| 2 Sept. | Light rain shower | 13° /8° | 4.2 mm | 3 | |
| 3 Sept. |  Moderate or heavy rain shower | 11° /7° | 2.5 mm | 3 | |
| 4 Sept. | Moderate rain at times | 11° /8° | 6 mm | 3 | |
| 5 Sept. | Moderate rain at times | 12° /8° | 4.8 mm | 3 | |
| 6 Sept. | Light rain shower | 12° /8° | 5.5 mm | 3 | |
| 7 Sept. | Patchy rain possible | 12° /7° | 6.6 mm | 3 | |
| 8 Sept. | Light rain shower | 11° /7° | 4.6 mm | 3 | |
| 9 Sept. | Light rain shower | 9° /6° | 9 mm | 2 | |
| 10 Sept. | Patchy rain possible | 10° /6° | 4.5 mm | 3 | |
| 11 Sept. | Patchy rain possible | 10° /6° | 0.8 mm | 3 | |
| 12 Sept. |  Overcast | 10° /5° | 4.9 mm | 3 | |
| 13 Sept. | Overcast | 10° /6° | 3.3 mm | 3 | |
| 14 Sept. | Patchy rain possible | 11° /6° | 1.3 mm | 3 | |
| 15 Sept. | Patchy rain possible | 11° /6° | 1.2 mm | 3 | |
| 16 Sept. | Patchy rain possible | 12° /8° | 0.5 mm | 0.2 | |
| 17 Sept. | Patchy rain possible | 9° /6° | 0.1 mm | 0.3 | |
| 18 Sept. |  Sunny | 7° /4° | 0 mm | 0.4 | |
| 19 Sept. | Sunny | 6° /3° | 0 mm | 0.4 | |
| 20 Sept. | Sunny | 7° /2° | 0 mm | 0.2 | |
| 21 Sept. | Patchy rain possible | 10° /5° | 0.5 mm | 2 | |
| 22 Sept. | Patchy rain possible | 11° /10° | 1.5 mm | 3 | |
| 23 Sept. | Sunny | 11° /9° | 0 mm | 3 | |
| 24 Sept. |  Partly cloudy | 12° /8° | 0 mm | 3 | |
| 25 Sept. | Patchy rain possible | 12° /9° | 0.3 mm | 3 | |
| 26 Sept. | Patchy rain possible | 12° /10° | 0.1 mm | 3 | |
| 27 Sept. | Partly cloudy | 12° /10° | 0 mm | 4 | |
| 28 Sept. | Patchy rain possible | 9° /6° | 0.3 mm | 2 | |
| 29 Sept. | Patchy rain possible | 8° /4° | 0.1 mm | 2 | |
| 30 Sept. | Overcast | 8° /4° | 1.6 mm | 2 | |
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Important Notice
Our weather forecast for Reykjavík 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 Reykjavík forecast closer to your planned date for the most up-to-date weather information.
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Reykjavík in September - FAQ
What are the expected maximum and minimum temperatures in Reykjavík 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 Reykjavík during September?
Significant rainfall exceeding 133.7 mm is expected in Reykjavík during September, occurring over more than 27 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Reykjavík in September 2025?
Reykjavík typically sees 0.0025 cm of snowfall during September.
What are the typical wind conditions in Reykjavík during September?
The average wind speed in Reykjavík during September is 26 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Reykjavík
Explore the daily rainfall trends and prepare for Reykjavíks September weather 💧
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