Reykjanesbær (Keflavík)
September
Weather in Reykjanesbær for September 2025
Your guide to Reykjanesbær weather in September - trends and predictions
Until now, September 2025 in Reykjanesbær has been nearly identical to the historical average, with a temperature of 10.8 °C (showing only a slight deviation of 0.4 °C).
The forecast for the next days in Reykjanesbær predicts temperatures to be around 10 °C, close to the historical average.
In general, the average temperature in Reykjanesbær at the beginning of September is 11 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 10.7 °C by the end of September.
Reykjanesbær in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 101.7 mm.
Temperatures
Rain 🌧️
12
Dry days
18
Rainy days
0
Snow days
9°/7°
Temperatures
39 km/h
Avg max wind
76 %
Avg humidity
Reykjanesbær Weather September
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Temperatures trend during September in Reykjanesbær
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September weather in Reykjanesbær day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 12° /9° | 3.8 mm | 3 | |
| 2 Sept. | Patchy rain possible | 11° /9° | 0.9 mm | 3 | |
| 3 Sept. |  Cloudy | 10° /8° | 0.1 mm | 3 | |
| 4 Sept. |  Light rain | 11° /8° | 4.8 mm | 3 | |
| 5 Sept. | Light rain shower | 11° /9° | 4.4 mm | 3 | |
| 6 Sept. | Light rain shower | 11° /9° | 5.3 mm | 3 | |
| 7 Sept. |  Moderate rain | 11° /8° | 11.1 mm | 3 | |
| 8 Sept. | Light rain shower | 11° /7° | 9.2 mm | 3 | |
| 9 Sept. | Light rain shower | 9° /6° | 2.3 mm | 3 | |
| 10 Sept. |  Overcast | 9° /6° | 7.8 mm | 2 | |
| 11 Sept. | Cloudy | 10° /7° | 1.6 mm | 3 | |
| 12 Sept. | Patchy rain possible | 10° /7° | 0.1 mm | 3 | |
| 13 Sept. | Overcast | 9° /6° | 0 mm | 2 | |
| 14 Sept. | Cloudy | 10° /7° | 0.7 mm | 3 | |
| 15 Sept. | Cloudy | 10° /8° | 1.1 mm | 3 | |
| 16 Sept. | Patchy rain possible | 12° /9° | 2.4 mm | 0.1 | |
| 17 Sept. | Patchy rain possible | 9° /7° | 0.8 mm | 0.4 | |
| 18 Sept. |  Sunny | 7° /5° | 0 mm | 0.4 | |
| 19 Sept. | Sunny | 7° /5° | 0 mm | 0.4 | |
| 20 Sept. |  Partly cloudy | 7° /5° | 0 mm | 0.2 | |
| 21 Sept. | Patchy rain possible | 11° /8° | 1.3 mm | 2 | |
| 22 Sept. | Patchy rain possible | 11° /11° | 1 mm | 3 | |
| 23 Sept. | Patchy rain possible | 11° /10° | 0.8 mm | 3 | |
| 24 Sept. | Patchy rain possible | 12° /9° | 0.3 mm | 3 | |
| 25 Sept. | Patchy rain possible | 12° /11° | 3.6 mm | 3 | |
| 26 Sept. | Patchy rain possible | 11° /10° | 0.2 mm | 3 | |
| 27 Sept. | Patchy rain possible | 12° /9° | 3.1 mm | 3 | |
| 28 Sept. | Patchy rain possible | 11° /9° | 3 mm | 2 | |
| 29 Sept. | Moderate rain | 9° /9° | 6.2 mm | 2 | |
| 30 Sept. | Light drizzle | 8° /5° | 1.4 mm | 3 | |
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Important Notice
Our weather forecast for Reykjanesbær 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 Reykjanesbær forecast closer to your planned date for the most up-to-date weather information.
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Reykjanesbær in September - FAQ
What are the expected maximum and minimum temperatures in Reykjanesbær 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 Reykjanesbær during September?
Significant rainfall exceeding 101.7 mm is expected in Reykjanesbær during September, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Reykjanesbær in September 2025?
Reykjanesbær typically sees 0 cm of snowfall during September.
What are the typical wind conditions in Reykjanesbær during September?
The average wind speed in Reykjanesbær during September is 39 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Reykjanesbær
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