The highest day temperature in January 2025 was 17°F. The lowest night temperature was -28°F. The average values for day and night temperatures during January were -0.5°F и -0.4°F respectivly.

The average sea surface temperature in January 2025 for Irkutsk was 34.0°F. The maximum and minimum values were 32.4°F and 35.4°F respectively.

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

Precipitation total in January for Irkutsk is 0.4 in. It makes january one of the least rainy months of the year.

The average wind speed in January is 3.4 mph. It makes January the most windless month of the year for Irkutsk.

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 January is 3.0 hours.