Weather in Reykjavík in September
September in Reykjavík is cool with average temperatures around 7.9°C (46.2°F). Expect significant rainfall with 181mm across approximately 22 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
9.8°C
49.6°F
Low
5.9°C
42.6°F
Precipitation
181 mm
7.1 inches
~22 rainy days
Conditions
Humidity
88%
Comparison to Adjacent Months
September is 2.6°C cooler than August, 60mm wetter than August.
September is 3.7°C warmer than October, 34mm wetter than October.