Hypothyroidism caused by Hashimoto's thyroiditis is treated with thyroid hormone replacement agents such as levothyroxine, triiodothyronine or desiccated thyroid extract. A tablet taken once a day generally keeps the thyroid hormone levels normal.
September deserves to be a more popular time to visit Iceland. Though youâll miss out on seeing the sun high in the sky well past 10pm (sunset is around 7:30pm and the sun rises around 6:30am), temperatures are still quite nice, with average temps between 10.1Â°C (50 Â°F) and 5Â°C (41 Â°F) throughout the month, and prices are lower and crowds are fewer.
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).