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.
Reykjavik: Annual Weather Averages. July is the hottest month in Reykjavik with an average temperature of 11Â°C (52Â°F) and the coldest is January at 0Â°C (32Â°F) with the most daily sunshine hours at 12 in March.The wettest month is January with an average of 50mm of rain.eykjavik: Annual Weather Averages. July is the hottest month in Reykjavik with an average temperature of 11Â°C (52Â°F) and the coldest is January at 0Â°C (32Â°F) with the most daily sunshine hours at 12 in March.