Irkutsk Weather & Climate: Best Time to Visit
Irkutsk, Irkutsk Region, Russia, sees big temperature differences between seasons, with July peaking at 25°C (77°F) and January dropping to -14°C (7°F).
Rain/snowfall is modest, totalling around 497 mm (20 in) annually. The city experiences a distinct dry season from October to April. August tends to be the wettest month. Sunshine peaks in May, when the city sees around 8.9 hours of sunshine per day.
Monthly Temperature in Irkutsk
Visitors to Irkutsk can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 25°C (77°F) in July, the warmest time of the year, to a very cold -14°C (7°F) during cooler months like January.
At night, you can expect temperatures ranging from 14°C (57°F) in July to around -24°C (-11°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Irkutsk
Irkutsk tends toward drier weather patterns, receiving approximately 497 mm (20 in) of rain/snow per year. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, August it receives high rainfall, averaging 102 mm (4 in) of precipitation, recorded across 14 rainy days. In contrast, the driest month February brings less snowfall, with 11 mm (0.4 in) over 8 snowy days. For more details, please visit our Irkutsk Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Irkutsk
Seasonal changes in sunshine hours are quite dramatic in Irkutsk. While May receives considerable daily sunshine with up to 8.9 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.2 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Irkutsk by Month
The relative humidity is high throughout the year in Irkutsk.
The city experiences its highest humidity in December, reaching 85%. In May, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Irkutsk 3-Day Forecast
Check the conditions for any month of the year.
Best Time to Visit Irkutsk
During June, July and August, Irkutsk experiences its most favorable weather, with temperatures between 23°C (73°F) and 25°C (77°F). These mild conditions make it an excellent time for a visit.The weather does bring rainfall during this period, between 71 mm (2.8 in) and 102 mm (4 in). Looking for inspiration on where to travel this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
