The highest day temperature in August 2025 was 80°F. The lowest night temperature was 53°F. The average values for day and night temperatures during August were 66.2°F и 65.8°F respectivly.

The average sea surface temperature in August 2025 for Irkutsk was 64.9°F. The maximum and minimum values were 61.8°F and 66.2°F respectively.

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

Precipitation total in August for Irkutsk is 2.2 in. It makes august one of the most rainy months of the year.

The average wind speed in August is 5.1 mph.

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 Irkutsk in August is 9.3 hours.