The highest day temperature in August 2025 was 73°F. The lowest night temperature was 45°F. The average values for day and night temperatures during August were 59.6°F и 52.9°F respectivly.

The average sea surface temperature in August 2025 for Trondheim was 61.1°F. The maximum and minimum values were 56.0°F and 69.6°F respectively.

Most of the days in August are gloomy but you can also expect sunny days.

Precipitation total in August for Trondheim is 3.4 in. It makes august the most rainy month of the year.

The average wind speed in August is 5.7 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Trondheim in August is 7.8 hours.