Blönduós Weather in September
September in Blönduós brings low temperatures, with daytime highs of 10°C (50°F) and nights around 6°C (43°F). It's also the wettest month of the year, so an umbrella is a must.
Rainfall in Blönduós in September
With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. Historically, the month has about 18 days of rain, averaging 116 mm (4.6 in) in total. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Blönduós in September
Daytime temperatures in Blönduós reach 10°C (50°F) in September, dropping to 6°C (43°F) at night. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. Nights fall to 6°C (43°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Blönduós. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Blönduós's climate page.
Blönduós Temperature in September
Min Temperature
6°C (43°F)
Max Temperature
10°C (50°F)
Chance of Rain
59%
Precipitation
116 mm (4.6 in)
Rainy days
18 days
Daily Historical Temperatures
43-year average (1983-2025)
Based on our historical records, temperatures in Blönduós typically drop from around 11°C (52°F) at the start of September to approximately 8°C (46°F) by the end. Nights are cold, with lows typically ranging from 3°C (37°F) to 6°C (43°F).
Average temperatures in September
Historical weather for Blönduós in September
Browse day-by-day weather records for Blönduós spanning 47 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Blönduós historical weather extremes in September
According to our 29 years of weather records for Blönduós, the following extremes were recorded between 1996 and 2025.
- The hottest September day on record in Blönduós reached 21°C (70°F) (September 4, 2010).
- The lowest daytime temperature in September was 0°C (32°F), recorded on September 23, 2005.
- The coldest night in September in Blönduós was on September 23, 2010, with a minimum of -5°C (23°F).
Best Places in Iceland in September
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in September →
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What to Wear in Blönduós in September
Pack for changing conditions in Blönduós in September. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes.What To Do in Blönduós in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Blönduós's climate page.
See the full Blönduós climate overview or explore weather in Iceland.
