Borgarnes Weather in September
September in Borgarnes brings low temperatures, with daytime highs of 12°C (54°F) and nights around 6°C (43°F). Quite a bit of rainfall is expected, around 140 mm (5.5 in), so pack an umbrella.
Rainfall in Borgarnes in September
Historically, September sees about 17 days of rain, with a monthly average of 140 mm (5.5 in). This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Borgarnes in September
Expect highs of 12°C (54°F) in Borgarnes in September, with nights dropping to around 6°C (43°F). Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. Nights drop to 6°C (43°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Borgarnes in September
The area enjoys a moderate level of sunlight, with around 121 hours. It's a good balance between sunny and cloudy days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June and July typically offer the best weather for Borgarnes.
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 Borgarnes's climate page.
Borgarnes Temperature in September
Min Temperature
6°C (43°F)
Max Temperature
12°C (54°F)
Chance of Rain
57%
Precipitation
140 mm (5.5 in)
Rainy days
17 days
Humidity
79% *
Sunshine
121 hours *
Percentage Sunshine
30% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Borgarnes typically stay consistent throughout September, with daily highs averaging around 12°C (54°F). Nights are cold, with lows typically ranging from 4°C (39°F) to 8°C (46°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 Borgarnes in September
Browse day-by-day weather records for Borgarnes spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Borgarnes historical weather extremes in September
Based on weather observations in Borgarnes between 1976 and 2025, these are the recorded extremes during September.
- On September 1, 2006, temperatures climbed to 18°C (64°F), marking the warmest September day on record.
- On September 30, 1981, Borgarnes saw its coldest September day with temperatures maxing out at 3°C (37°F).
- Nighttime temperatures dropped to -5°C (23°F) on September 25, 2020, marking the coldest September night on record.
- The heaviest September precipitation occurred on September 17, 2008, when 37 mm (1.5 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 →
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What to Wear in Borgarnes 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. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Borgarnes 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 Borgarnes's climate page.
Temperature Rainfall Sunshine Humidity
See the full Borgarnes climate overview or explore weather in Iceland.
