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 12 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 7.9 °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.
Is September a good time to visit Reykjavík? check out the best time to travel to Reykjavík page.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
3
Dry days
27
Rainy days
0
Snow days
10°/6°
Temperatures
26 km/h
Avg max wind
78 %
Avg humidity
Reykjavík in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  12° | 2 13° | 3  11° | 4 12° | 5 12° | 6 12° | 7 12° |
| 8 11° | 9  9° | 10 10° | 11 9° | 12 10° | 13 10° | 14 10° |
| 15 10° | 16 11° | 17 10° | 18 11° | 19 10° | 20 11° | 21 9° |
| 22 8° | 23 8° | 24 9° | 25  8° | 26 7° | 27 8° | 28 7° |
| 29 8° | 30 8° |
You can click on date
Access Reykjavík weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Reykjavík
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Patchy rain possible | 12° /9° | 5.4 mm | 3 | |
| 2 Sept. | Light rain shower | 13° /8° | 5.2 mm | 3 | |
| 3 Sept. | Moderate or heavy rain shower | 11° /7° | 3.1 mm | 3 | |
| 4 Sept. | Moderate rain at times | 12° /8° | 5 mm | 3 | |
| 5 Sept. | Moderate rain at times | 12° /8° | 4.9 mm | 3 | |
| 6 Sept. | Light rain shower | 12° /9° | 5.9 mm | 3 | |
| 7 Sept. | Patchy rain possible | 12° /7° | 5.3 mm | 3 | |
| 8 Sept. | Patchy rain possible | 11° /7° | 2.9 mm | 3 | |
| 9 Sept. | Overcast | 9° /6° | 10.3 mm | 3 | |
| 10 Sept. | Patchy rain possible | 10° /6° | 2.5 mm | 3 | |
| 11 Sept. | Patchy rain possible | 9° /5° | 0.5 mm | 3 | |
| 12 Sept. | Overcast | 10° /5° | 6.1 mm | 3 | |
| 13 Sept. | Overcast | 10° /6° | 3.9 mm | 3 | |
| 14 Sept. | Patchy rain possible | 10° /6° | 0.6 mm | 3 | |
| 15 Sept. | Moderate rain at times | 10° /5° | 1.4 mm | 3 | |
| 16 Sept. | Patchy rain possible | 11° /6° | 11.2 mm | 3 | |
| 17 Sept. | Overcast | 10° /7° | 4.5 mm | 3 | |
| 18 Sept. | Moderate or heavy rain shower | 11° /6° | 10.6 mm | 3 | |
| 19 Sept. | Patchy rain possible | 10° /7° | 3.9 mm | 3 | |
| 20 Sept. | Moderate rain at times | 11° /6° | 4.8 mm | 3 | |
| 21 Sept. | Moderate or heavy rain shower | 9° /5° | 7.7 mm | 3 | |
| 22 Sept. | Patchy rain possible | 8° /5° | 1.6 mm | 2 | |
| 23 Sept. | Moderate or heavy rain shower | 8° /4° | 4 mm | 2 | |
| 24 Sept. | Patchy rain possible | 9° /4° | 4.3 mm | 2 | |
| 25 Sept. | Cloudy | 8° /4° | 0.4 mm | 3 | |
| 26 Sept. | Patchy rain possible | 7° /3° | 3.3 mm | 2 | |
| 27 Sept. | Cloudy | 8° /3° | 1.3 mm | 2 | |
| 28 Sept. | Patchy rain possible | 7° /4° | 2.2 mm | 2 | |
| 29 Sept. | Moderate rain at times | 8° /4° | 9.3 mm | 2 | |
| 30 Sept. | Overcast | 8° /4° | 1.6 mm | 2 | |
| Next | |||||
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 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.
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
September rainfall patterns in Reykjavík
Explore the daily rainfall trends and prepare for Reykjavíks September weather 💧
Quick links
You are here
Where is Reykjavík?Get accurate weather forecasts for Reykjavík, located at latitude 64.135 and longitude -21.895. Stay updated with localized weather information tailored for Reykjavík.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.