Reykjavik Weather in September
In September, Reykjavik averages a high of 11°C (51°F) and a low of 6°C (42°F), based on 55 years of historical weather data from REYKJAVIK.
11°C
Average high
51°F
6°C
Average low
42°F
18°C
Record high
65°F · 2019
-5°C
Record low
23°F · 1988
What to Expect in Reykjavik in September
Typical September days in Reykjavik reach 11°C (51°F) during the afternoon and cool to around 6°C (42°F) overnight. On average, measurable rain falls on about 63% of days this month. Over the past 55 years, September temperatures in Reykjavik have ranged from a record high of 18°C (2019) down to a record low of -5°C (1988).
For a day-by-day look or other months, see the full Reykjavik weather history.