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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.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
11
Dry days
Average rainy days
19
Rainy days
Average snowy days
0
Snow days
Average temperatures
9°/7°
Temperatures
Average wind speed
29 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Reykjavík in September average weather

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Temperatures trend during September in Reykjavík

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
12° /9° 7.3 mm 3
2 Sept. Light rain shower
Light rain shower
11° /8° 10.3 mm 3
3 Sept. Light rain shower
Light rain shower
9° /6° 3.8 mm 3
4 Sept. Light rain shower
Light rain shower
10° /7° 4.3 mm 3
5 Sept. Overcast
Overcast
11° /8° 6.6 mm 3
6 Sept. Light rain shower
Light rain shower
11° /9° 9.6 mm 3
7 Sept. Light rain
Light rain
11° /8° 10.3 mm 3
8 Sept. Light rain shower
Light rain shower
9° /6° 5.1 mm 3
9 Sept. Light rain shower
Light rain shower
7° /4° 2.6 mm 2
10 Sept. Patchy rain possible
Patchy rain possible
7° /5° 0.3 mm 2
11 Sept. Partly cloudy
Partly cloudy
8° /3° 0 mm 3
12 Sept. Overcast
Overcast
8° /4° 0 mm 2
13 Sept. Overcast
Overcast
8° /5° 0 mm 2
14 Sept. Partly cloudy
Partly cloudy
10° /6° 0.1 mm 3
15 Sept. Overcast
Overcast
9° /5° 0.4 mm 3
16 Sept. Moderate rain
Moderate rain
10° /6° 21 mm 3
17 Sept. Light rain shower
Light rain shower
10° /7° 9 mm 3
18 Sept. Partly cloudy
Partly cloudy
10° /5° 12.2 mm 4
19 Sept. Patchy rain possible
Patchy rain possible
9° /5° 0.5 mm 3
20 Sept. Partly cloudy
Partly cloudy
10° /5° 0.2 mm 3
21 Sept. Sunny
Sunny
9° /5° 0 mm 3
22 Sept. Overcast
Overcast
8° /5° 0.6 mm 2
23 Sept. Light drizzle
Light drizzle
8° /5° 1.3 mm 2
24 Sept. Light rain
Light rain
8° /4° 3.2 mm 2
25 Sept. Cloudy
Cloudy
8° /4° 0.1 mm 3
26 Sept. Light rain
Light rain
8° /4° 4.6 mm 2
27 Sept. Light rain
Light rain
8° /4° 2.6 mm 2
28 Sept. Patchy rain possible
Patchy rain possible
8° /5° 0.4 mm 2
29 Sept. Sunny
Sunny
7° /4° 4 mm 3
30 Sept. Light drizzle
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

September rainfall patterns in Reykjavík

Explore the daily rainfall trends and prepare for Reykjavíks September weather 💧

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Location coordinates 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.

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