Ísafjörður Weather in September
In Ísafjörður, September brings low daytime temperatures around 9°C (48°F), with nights cooling to 5°C (41°F). Expect quite a bit of rainfall this month.
Rainfall in Ísafjörður in September
Historically, the month has about 18 days of rain, averaging 124 mm (4.9 in) in total. 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 Ísafjörður in September
Daytime temperatures in Ísafjörður reach 9°C (48°F) in September, dropping to 5°C (41°F) at night. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. Nights fall to 5°C (41°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Ísafjörður.
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 Ísafjörður's climate page.
Ísafjörður Temperature in September
Min Temperature
5°C (41°F)
Max Temperature
9°C (48°F)
Chance of Rain
61%
Precipitation
124 mm (4.9 in)
Rainy days
18 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ísafjörður typically stay consistent throughout September, with daily highs averaging around 9°C (48°F). Nights are cold, with lows typically ranging from 3°C (37°F) to 6°C (43°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Ísafjörður in September
Browse day-by-day weather records for Ísafjörður spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ísafjörður historical weather extremes in September
Based on 30 years of weather observations (1995-2025), these are the most extreme conditions recorded in Ísafjörður.
- The hottest September day on record in Ísafjörður reached 18°C (64°F) (September 2, 2010).
- The lowest daytime temperature in September was 1°C (34°F), recorded on September 24, 2005.
- The lowest overnight temperature recorded in September was -4°C (25°F) (September 25, 2020).
- The heaviest September precipitation occurred on September 28, 2021, when 47 mm (1.9 in) of precipitation fell.
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 →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Ísafjörður in September
Dress warmly and in layers for your trip to Ísafjörður in September. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Expect heavy rainfall, so bring good rain protection and waterproof bags.What To Do in Ísafjörður 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 Ísafjörður's climate page.
See the full Ísafjörður climate overview or explore weather in Iceland.
