Early autumn · Weather & things to do
Reykjavík in September
The year's rain peaks now, with about 7.1 in (181 mm) falling in Reykjavík, alongside highs near 51°F (10°C) and lows of 44°F (7°C).
Our comfort score puts it mid-table at 44/100, 5th of 12.
- Avg high
- 51°F (10°C)
- Avg low
- 44°F (7°C)
- Rain
- 7.1 in (181 mm)
- Humidity
- 88%
- Cloud cover
- 80%
- Daylight
- ~12 h 37 min
- Comfort score
- 44/100 · Tough
What September feels like
It's cool, with highs near 51°F (10°C), so a proper jacket stays on most of the day.
After dark, temperatures fall to about 44°F (7°C).
Expect regular rain: about 7.1 in (181 mm) falls in the month.
Skies are often grey, with average cloud cover around 80%.
Plan around September
September sits mid-table; the best months are June – August.
- Comfort slips from 61/100 in August to 44/100.
- September sits inside the Jun – Sep window our Iceland Ring Road route recommends.
What to pack for September
- Insulated jackethighs only 51°F
- Rain jacket and waterproof shoes7.1 in of rain on average
- Comfortable walking shoesmost picks involve some walking
What to do in Reykjavík in September
With 7.1 in of rain, these picks lean toward food, drink and places with a roof, with outdoor options when the weather breaks.
Kaldi Bar
Laugavegur bar pouring Kaldi beer from northern Iceland.
Why now A sit-down stop to wait out showers in a month with 7.1 in of rain.
Brauð & Co.
Bakery with a painted facade, famous for cinnamon snails.
Why now Easy to slot in when September's rain moves in.
Bæjarins Beztu Pylsur
Harbor hot-dog stand open since 1937.
Why now Keeps part of the day dry on wetter September days.
Hallgrímskirkja
Concrete church inspired by basalt columns, with a tower lift over the rooftops.
Why now An indoor-leaning stop for a month with 7.1 in of rain.
National Museum of Iceland
Settlement-to-today history of Iceland in one clear permanent exhibit.
Why now A good rainy-day backup in September.
Nearby in September
- Vík in September~103 mi · highs 50°F, 9.0 in rain · similar daytime temperatures, wetter
- Jökulsárlón in September~172 mi · highs 46°F, 8.7 in rain · 3°C (5°F) cooler by day, wetter
- Mývatn in September~177 mi · highs 43°F, 4.2 in rain · 4°C (7°F) cooler by day, drier
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Reykjavík in September: quick answers
Is September a good time to visit Reykjavík?
It's middling, scoring 44/100. The best months are June – August, at up to 64. Expect highs of 51°F (10°C) and 7.1 in (181 mm) of rain. September is inside the Jun – Sep window our Iceland Ring Road route recommends.
How cold is Reykjavík in September?
Average highs are 51°F (10°C) and average lows 44°F (7°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Reykjavík in September?
Yes: about 7.1 in (181 mm) of rain falls across September on average, the wettest month of the year. The annual total is about 64.5 in (1638 mm).
What should I pack for Reykjavík in September?
Bring insulated jacket (highs only 51°F), rain jacket and waterproof shoes (7.1 in of rain on average) and comfortable walking shoes (most picks involve some walking).
More on Reykjavík
Routes in season in September
- Iceland Ring Road Jun – Sep
Planning Reykjavík in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.