Orkney, Scotland In Orkney, Scotland the average temperature is 8.13C (46.625F). 2.00C (35.60F) is the lowest monthly average low temperature (occurring in January & February) while 16.00C (60.80F) is the highest monthly average high temperature which occurs in July & August. Thus the average temperature range is 9.00C (48.20F). Wet weather in Orkney adds up [...]