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Irkutsk Weather in May
May in Irkutsk sees daytime temperatures around 17°C (63°F) and lows of 3°C (37°F) at night. Pack a rain jacket because some rainfall is likely.
Rainfall in Irkutsk in May
Historically, May sees about 10 days of rain, with a monthly average of 42 mm (1.7 in). A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Irkutsk in May
Daytime highs in Irkutsk in May reach 17°C (63°F), with nights around 3°C (37°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows around 3°C (37°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Irkutsk in May
Expect a lot of sunshine this month, with about 267 hours of sun. These sunny conditions add to the overall experience.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June and July typically offer the best weather for Irkutsk.
Irkutsk Temperature in May
Min Temperature
3°C (37°F)
Max Temperature
17°C (63°F)
Chance of Rain
35%
Precipitation
42 mm (1.7 in)
Rainy days
10 days
Humidity
55%
Sunshine
267 hours
Percentage Sunshine
Irkutsk Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Irkutsk - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Irkutsk typically rise from around 13°C (55°F) at the start of May to approximately 19°C (66°F) by the end. Nights are cold, with lows typically ranging from -1°C (30°F) to 6°C (43°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Irkutsk in May
Browse day-by-day weather records for Irkutsk spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Irkutsk historical weather extremes in May
Based on 50 years of weather observations in Irkutsk between 1976 and 2026, these are the recorded extremes.
- On May 26, 1999, temperatures climbed to 33°C (91°F), marking the warmest May day on record.
- The coldest night in May in Irkutsk was on May 4, 2001, with a minimum of -8°C (18°F).
- The heaviest May precipitation occurred on May 1, 2017, when 27 mm (1.1 in) of precipitation fell.
Best Places in Russia in May
Find out more about the weather in Russia and which places have the best travel conditions in this month. See all of Russia in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Irkutsk in May
For Irkutsk in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Irkutsk in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling6/10 -
Walking6/10 -
Camping5/10 -
Outdoor sports10/10
Irkutsk 3-Day Forecast
More climate data for Irkutsk
Temperature Rainfall Sunshine Humidity
See the full Irkutsk climate overview or explore weather in Russia.
Popular in May
Where to go in May - average daytime high across popular destinations.
Gelendzhik
20°C (68°F) Anapa
20°C (68°F) Sochi
20°C (68°F) Adler19°C (66°F) Moscow20°C (68°F) Kazan20°C (68°F) Yekaterinburg18°C (64°F) Saint Petersburg16°C (61°F) Bucket list
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