Reykjavík
September
Weather in Reykjavík for September 2025
Your guide to Reykjavík weather in September - trends and predictions
In general, the average temperature in Reykjavík at the beginning of September is 10.7 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 7.7 °C by the end of September.
Expect significant rainfall in Reykjavík during September, with an average of 19 rainy days.
Is September a good time to visit Reykjavík? check out the best time to travel to Reykjavík page.
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11
Dry days
19
Rainy days
0
Snow days
9°/7°
Temperatures
29 km/h
Avg max wind
77 %
Avg humidity
Reykjavík in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  12° | 2  11° | 3 9° | 4 10° | 5 11° | 6 11° | 7  11° |
| 8 9° | 9 7° | 10 7° | 11  8° | 12 8° | 13 8° | 14 10° |
| 15 9° | 16  10° | 17 10° | 18 10° | 19 9° | 20 10° | 21  9° |
| 22 8° | 23 8° | 24 8° | 25  8° | 26 8° | 27 8° | 28 8° |
| 29 7° | 30 7° |
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Temperatures trend during September in Reykjavík
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 12° /9° | 7.3 mm | 3 | |
| 2 Sept. | Light rain shower | 11° /8° | 10.3 mm | 3 | |
| 3 Sept. | Light rain shower | 9° /6° | 3.8 mm | 3 | |
| 4 Sept. | Light rain shower | 10° /7° | 4.3 mm | 3 | |
| 5 Sept. | Overcast | 11° /8° | 6.6 mm | 3 | |
| 6 Sept. | Light rain shower | 11° /9° | 9.6 mm | 3 | |
| 7 Sept. | Light rain | 11° /8° | 10.3 mm | 3 | |
| 8 Sept. | Light rain shower | 9° /6° | 5.1 mm | 3 | |
| 9 Sept. | Light rain shower | 7° /4° | 2.6 mm | 2 | |
| 10 Sept. | Patchy rain possible | 7° /5° | 0.3 mm | 2 | |
| 11 Sept. | Partly cloudy | 8° /3° | 0 mm | 3 | |
| 12 Sept. | Overcast | 8° /4° | 0 mm | 2 | |
| 13 Sept. | Overcast | 8° /5° | 0 mm | 2 | |
| 14 Sept. | Partly cloudy | 10° /6° | 0.1 mm | 3 | |
| 15 Sept. | Overcast | 9° /5° | 0.4 mm | 3 | |
| 16 Sept. | Moderate rain | 10° /6° | 21 mm | 3 | |
| 17 Sept. | Light rain shower | 10° /7° | 9 mm | 3 | |
| 18 Sept. | Partly cloudy | 10° /5° | 12.2 mm | 4 | |
| 19 Sept. | Patchy rain possible | 9° /5° | 0.5 mm | 3 | |
| 20 Sept. | Partly cloudy | 10° /5° | 0.2 mm | 3 | |
| 21 Sept. | Sunny | 9° /5° | 0 mm | 3 | |
| 22 Sept. | Overcast | 8° /5° | 0.6 mm | 2 | |
| 23 Sept. | Light drizzle | 8° /5° | 1.3 mm | 2 | |
| 24 Sept. | Light rain | 8° /4° | 3.2 mm | 2 | |
| 25 Sept. | Cloudy | 8° /4° | 0.1 mm | 3 | |
| 26 Sept. | Light rain | 8° /4° | 4.6 mm | 2 | |
| 27 Sept. | Light rain | 8° /4° | 2.6 mm | 2 | |
| 28 Sept. | Patchy rain possible | 8° /5° | 0.4 mm | 2 | |
| 29 Sept. | Sunny | 7° /4° | 4 mm | 3 | |
| 30 Sept. | Light drizzle | 7° /4° | 0.6 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.
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 9° and lows near 7°, suitable for diverse activities and preferences.
How much rainfall should be expected in Reykjavík during September?
Significant rainfall exceeding 137.8 mm is expected in Reykjavík during September, occurring over more than 19 days. Preparing for wet conditions is recommended in your planning.
Is snowfall common in Reykjavík during September?
Reykjavík experiences an average snowfall of 0 cm during September, occurring over 0 days, which may interest winter sports enthusiasts.
What are the typical wind conditions in Reykjavík during September?
The average wind speed in Reykjavík during September is 29 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Reykjavík in September?
As you prepare for your trip to Reykjavík in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Reykjavík, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
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