Siglufjörður Weather in September
September in Siglufjörður brings low temperatures around 9°C (48°F) during the day, dropping to 5°C (41°F) at night, with quite a bit of rainfall expected, averaging around 130 mm (5.1 in) for the month.
Rainfall in Siglufjörður in September
Typically, you can expect about 16 days of rain this month, with 130 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 Siglufjörður in September
In September, Siglufjörður gets low temperatures, with highs of 9°C (48°F). Nights cool to around 5°C (41°F). Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. 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.
Sunshine in Siglufjörður in September
This month sees fewer sunny days, with about 85 hours of sunshine, perfect for those who enjoy cooler temperatures.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Siglufjörður. 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 Siglufjörður's climate page.
Siglufjörður Temperature in September
Min Temperature
5°C (41°F)
Max Temperature
9°C (48°F)
Chance of Rain
53%
Precipitation
130 mm (5.1 in)
Rainy days
16 days
Humidity
77% *
Sunshine
85 hours *
Percentage Sunshine
20% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Siglufjörður 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 0°C (32°F) to 5°C (41°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 Siglufjörður in September
Browse day-by-day weather records for Siglufjörður spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Siglufjörður historical weather extremes in September
Based on 49 years of weather observations in Siglufjörður between 1976 and 2025, these are the recorded extremes.
- On September 1, 2017, temperatures climbed to 22°C (72°F), marking the warmest September day on record.
- The coldest September day was on September 29, 1988, with a maximum of 1°C (34°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 →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Siglufjörður in September
We recommend to layer up for chilly conditions in Siglufjörður 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. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.What To Do in Siglufjörður 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 Siglufjörður's climate page.
Temperature Rainfall Sunshine Humidity
See the full Siglufjörður climate overview or explore weather in Iceland.
