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Flateyri Weather in September
September in Flateyri sees daytime temperatures around 9°C (48°F) and lows of 5°C (41°F) at night. With around 129 mm (5.1 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Flateyri in September
Typically, you can expect about 19 days of rain this month, with 129 mm (5.1 in) on average. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Flateyri in September
In September, Flateyri sees low temperatures, with highs of 9°C (48°F). Nights drop to around 5°C (41°F). The month of September belongs to the summer season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. At 5°C (41°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.September in Flateyri has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Flateyri Temperature in September
Min Temperature
5°C (41°F)
Max Temperature
9°C (48°F)
Chance of Rain
63%
Precipitation
129 mm (5.1 in)
Rainy days
19 days
Flateyri Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Flateyri - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Flateyri 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 records for Flateyri in September
Browse day-by-day weather records for Flateyri spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Flateyri historical weather extremes in September
Based on 30 years of weather observations in Flateyri between 1995 and 2025, these are the recorded extremes.
- On September 24, 2005, Flateyri saw its coldest September day with temperatures maxing out at 1°C (34°F).
- The coldest night in September in Flateyri was on September 25, 2020, with a minimum of -5°C (23°F).
- The wettest September day on record brought 47 mm (1.9 in) of precipitation to Flateyri (September 28, 2021).
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
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Flateyri in September
We recommend to layer up for chilly conditions in Flateyri in September. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.
What To Do in Flateyri in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling4/10 -
Walking4/10 -
Barbeque1/10 -
Camping3/10 -
Outdoor sports4/10
Flateyri 3-Day Forecast
More climate data for Flateyri
See the full Flateyri climate overview or explore weather in Iceland.
Popular in September
Where to go in September - average daytime high across popular destinations.
Reykjavík
12°C (54°F) Kópavogur12°C (54°F) Hella
13°C (55°F) Selfoss12°C (54°F) Keflavík12°C (54°F) Höfn10°C (50°F) Egilsstadir
10°C (50°F) Akureyri9°C (48°F) Bucket list
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