The best times to visit Irkutsk for ideal weather are

June 4th to September 9th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Irkutsk Travel Info

Weather in Irkutsk


Average temperatures in Irkutsk vary an incredible amount. Considering humidity, temperatures feel cold for most of the year with a low chance of precipitation most of the year. The area is less temperate than some — in the 37th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Irkutsk, the hottest months are July, June, and then August. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 78.1°F (25.6°C) with temperatures rarely dropping below 54.4°F (12.4°C) at night.

Irkutsk Temperatures (Fahrenheit)


Irkutsk Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Irkutsk Perceived Temperature (F)


Irkutsk Perceived Temperature (C)



Average Irkutsk Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 7.7 -2.6 -13.6
Feb 15.2 1.8 -11.8
Mar 32.6 19.8 5.5
Apr 50.9 38.3 25.7
May 62.4 49 34.8
Jun 73.5 60.7 47.4
Jul 77.2 65 53.1
Aug 72.4 60.3 48.3
Sep 60.6 47.9 35.7
Oct 46.2 34.4 22.9
Nov 26.5 16.2 4.5
Dec 10.8 1.6 -8.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -13.5 -19.2 -25.3
Feb -9.3 -16.8 -24.3
Mar 0.3 -6.8 -14.7
Apr 10.5 3.5 -3.5
May 16.9 9.4 1.6
Jun 23.1 15.9 8.6
Jul 25.1 18.3 11.7
Aug 22.4 15.7 9.1
Sep 15.9 8.8 2.1
Oct 7.9 1.3 -5.1
Nov -3.1 -8.8 -15.3
Dec -11.8 -16.9 -22.7



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Irkutsk are March, February, and then January. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late February and early March. For example, on the week of February 26th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid July with an average of 2 days of significant precipitation the week of July 16th.

When can you find snow in Irkutsk? Weather stations report very large amounts of snow likely to be deepest around February, especially close to mid February. The best time to ski (if at all) in Irkutsk is often around around February 12th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Irkutsk.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Irkutsk (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 5% 10 0.6
Feb 3% 11.6 0.3
Mar 1% 8.7 0.3
Apr 7% 2.7 0.9
May 14% 1.5 1.4
Jun 20% 0 1.9
Jul 24% 0 3.1
Aug 17% 0 2.4
Sep 12% 1.2 1.4
Oct 6% 2 0.7
Nov 5% 3.4 0.6
Dec 9% 6.8 0.8

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 5 25.4 1.5
Feb 3 29.5 0.8
Mar 1 22.1 0.8
Apr 7 6.9 2.3
May 14 3.8 3.6
Jun 20 0 4.8
Jul 24 0 7.9
Aug 17 0 6.1
Sep 12 3 3.6
Oct 6 5.1 1.8
Nov 5 8.6 1.5
Dec 9 17.3 2


Humidity and Wind

Irkutsk has some very humid months, and slightly dry months in the opposite season. The least humid month is May (39.2% relative humidity), and the most humid month is December (72.7%).

Wind in Irkutsk is usually calm. The windiest month is May, followed by April and June. May’s average wind speed of around 8.1 knots (9.3 MPH or 15 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late April where average top sustained speeds reach 17.4 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Irkutsk.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 4.6 Light breeze 9.5 Gentle breeze
Feb 5.2 Light breeze 11 Significant breeze
Mar 6.3 Light breeze 13 Gentle breeze
Apr 7.7 Gentle breeze 15.5 Significant breeze
May 8.1 Gentle breeze 16.9 Gentle breeze
Jun 6.5 Light breeze 13.4 Significant breeze
Jul 5.5 Light breeze 11.9 Gentle breeze
Aug 6 Light breeze 11.9 Significant breeze
Sep 6.3 Light breeze 12.6 Gentle breeze
Oct 6.1 Light breeze 12.1 Significant breeze
Nov 5.5 Light breeze 11.3 Gentle breeze
Dec 4.6 Light breeze 9.5 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 67.5%
Feb 57%
Mar 47.8%
Apr 39.7%
May 39.2%
Jun 54.1%
Jul 63.9%
Aug 66.9%
Sep 62.7%
Oct 60.5%
Nov 70.4%
Dec 72.7%


Is it Safe to Travel to Irkutsk?

Our best data indicates this area is somewhat safe, but with extra warnings in a few regions. As of Oct 07, 2019 there are travel warnings and regional advisories for Russia; exercise a high degree of caution and avoid some areas. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 22, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Irkutsk, Russia is October, followed by August and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Irkutsk in February. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 42.4 in February means 42.4% of the tourists vs. October.



Overall Irkutsk Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 68.7°F (20.4°C) and 24°F (-4.4°C) with far warmer temperatures in the later months. Rain is rare with 0 to 4 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see the most precipitation with 5 to 7 days of precipitation per month. June – August is the busiest season for tourism in Irkutsk, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 64.3°F (17.9°C) and 19.8°F (-6.8°C), which will feel very chilly given the humidity and wind. It rains or snows a normal amount: 2 to 4 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is far too cold this time of year in Irkutsk to be enjoyable for warm weather travelers. The average high during this season is between 24°F (-4.4°C) and 6.4°F (-14.2°C). On average, it rains or snows a smalll amount: 1 to 3 times per month. These times of year are the slowest with tourists.


Best Times to TravelEastern Europe › Irkutsk, Russia