Álftanes Weather in September

September in Álftanes brings moderate temperatures, with highs of 12°C (54°F) and nights dropping to 7°C (45°F). Rainfall is on the higher side this month, averaging around 143 mm (5.6 in), so keep a rain jacket handy.

Rainfall in Álftanes in September

Past climate data indicates that roughly 18 days will see rain, totalling around 143 mm (5.6 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Álftanes in September

If you're visiting Álftanes in September, expect highs of 12°C (54°F) and overnight lows around 7°C (45°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With overnight lows of 7°C (45°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Álftanes in September

The area experiences a moderate amount of sunshine, with approximately 121 hours of sunlight expected. This means a decent mix of sun and overcast.

Wind Speed in Álftanes in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in September

At 10°C (50°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June and July typically offer the best weather for Álftanes.

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• January
• February
• March
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• May
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• October
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For a detailed overview over the year and the best time to visit Iceland, check out our Álftanes's climate page.

Álftanes Temperature in September

Min Temperature 7°C (45°F)  

Max Temperature 12°C (54°F)  

Water Temperature 10°C (50°F) *  

Chance of Rain 60%  

Precipitation 143 mm (5.6 in)  

Rainy days 18 days  

Humidity 79% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 121 hours *  

Percentage Sunshine 30% *  

* Data from: Reykjavík, Iceland (6 KM, 4 Miles).

What to Wear in Álftanes in September

The weather can be unpredictable in September, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. The water temperature sits at about 10°C (50°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Álftanes in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

5/10

Walking

5/10

Camping

3/10

Outdoor sports

5/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Iceland, check out our Álftanes's climate page.

More climate data for Álftanes

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Álftanes climate overview or explore weather in Iceland.