Reykjahlíð Weather in September
Reykjahlíð in September sees low daytime temperatures of 11°C (52°F) and nighttime lows of 4°C (39°F). Rainfall is fairly high this month at around 104 mm (4.1 in), so pack a rain jacket to stay dry.
Rainfall in Reykjahlíð in September
Historically, September sees about 15 days of rain, with a monthly average of 104 mm (4.1 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Reykjahlíð in September
In September, Reykjahlíð gets low temperatures, with highs of 11°C (52°F). Nights cool to around 4°C (39°F). Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. At 4°C (39°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Reykjahlíð in September
The month is characterized by fewer sunny days, with roughly 85 hours hours of sunshine. Ideal for those who prefer a cooler, cloudier climate.September in Reykjahlíð 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.
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 Reykjahlíð's climate page.
Reykjahlíð Temperature in September
Min Temperature
4°C (39°F)
Max Temperature
11°C (52°F)
Chance of Rain
48%
Precipitation
104 mm (4.1 in)
Rainy days
15 days
Humidity
77% *
Sunshine
85 hours *
Percentage Sunshine
20% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Reykjahlíð typically drop from around 12°C (54°F) at the start of September to approximately 8°C (46°F) by the end. Nights are cold, with lows typically ranging from 2°C (36°F) to 7°C (45°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 Reykjahlíð in September
Browse day-by-day weather records for Reykjahlíð spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Reykjahlíð historical weather extremes in September
Based on 49 years of weather observations in Reykjahlíð between 1976 and 2025, these are the recorded extremes.
- On September 4, 2010, temperatures climbed to 23°C (73°F), marking the warmest September day on record.
- The coldest September day was on September 28, 1994, with a maximum of 0°C (32°F).
- Reykjahlíð registered its coldest September night on September 29, 1995, with temperatures dropping to -8°C (18°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
poor
What to Wear in Reykjahlíð 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. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Reykjahlíð 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 Reykjahlíð's climate page.
Temperature Rainfall Sunshine Humidity
See the full Reykjahlíð climate overview or explore weather in Iceland.
