Here are two other ways to check if your body is dehydrated. Try this skin test. First, use two fingers to grab a roll of skin on the back of your hand (between where your watch sits and where your fingers start), advises Higgins. Pull the skin up about Â½ to one centimeter high and then let the skin go.
October is our wettest month, and Iceland gets an average low of 37Â°F (about 3Â°C) and highs of 45Â°F (7Â°C). Expect lots of rain, usually drizzle. The average amount of rain is 4 to 5 inches, or 101-127 mm. But as always, the rain amount depends on which part of Iceland you are visiting.
Summary of temperatures and weather in October: Average temperature: 24Â° C or 75.2 F. Maximum temperature: 26Â° C or 78.8 F. Minimum temperature: 19Â° C or 66.2 F. Our Advice. In the weather log below, you will see that most of the time it is sunny with some overcast days in October.