Figure in the cost of excavation. A concrete slab is generally installed over a gravel base. The base is 4 inches, and the slab itself is 4 inches, with 2 inches above ground and 2 inches below. This means that for the average slab, you will be digging down 6 inches.
Quick facts about the weather and daylight in January. Average temperature: -0.11Â°C / 31.8Â°F. Average hours of sunlight: 24.8. Average of lowest and highest recorded temperature in January: Low -10.55Â°C / 13.01Â°F â High 8.15Â°C / 46.67Â°F. Length of day on January 1st: 4 hours and 24 minutes. If you are looking for Mai Thais by the pool and tropical weather, Iceland in January is probably not for you. If, however, winter is your jam then pack your bags and head on over.
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). There is a variation/ range of daily average temperatures of 4.8 C (8.7 F). 2  The warmest month (July) is quite mild with an average temperature of 10.6 degrees Celsius (51.08 degrees Fahrenheit). 3  The coolest month (January) is slightly cold having a mean temperature of -0.5 degrees Celsius (31.1 degrees Fahrenheit).