iceland temperature in january fahrenheit
Average Temperatures in Reykjav k, Iceland. 1  The average annual temperature in Reykjav k, Iceland is cool at 4.3 degrees Celsius (39.7 degrees Fahrenheit). 2  Mean monthly temperatures vary by 11.1 C (20 F) which is a low range.3  There is a variation/ range of daily average temperatures of 4.8 C (8.7 F). The warmest month (July) is quite mild with an average temperature of 10.6 degrees Celsius (51.08 degrees Fahrenheit). 2  The coolest month (January) is slightly cold having a mean temperature of -0.5 degrees Celsius (31.1 degrees Fahrenheit).