Irkutsk Oblast weather in May
May is one of the best months to visit Irkutsk Oblast: highs of 16°C (61°F) and about 41 mm (1.6 in) of rain on average. Nights average 3°C (38°F) and cloud cover 67% (NASA POWER, 2001–2025 averages). It is the 5th wettest month of the year and the 4th warmest. Compared with April, it is warmer and wetter; June brings highs of 24°C (76°F) and 57 mm (2.2 in) of rain.
Figures are long-term averages for Irkutsk, the largest city in Irkutsk Oblast. See below for other places.
Is May a good time to visit Irkutsk Oblast?
best month Weather score 69/100.
Yes. May is one of the best months for weather in Irkutsk Oblast.
Does it rain a lot in Irkutsk Oblast in May?
No, it is usually dry: about 41 mm (1.6 in) falls in an average May. It is the 5th wettest month of the year.
How warm is Irkutsk Oblast in May?
Days average 16°C (61°F) and nights 3°C (38°F).
Irkutsk Oblast weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -17°C (2°F) | -25°C (-14°F) | 11 mm | 59% | least pleasant |
| February | -13°C (9°F) | -23°C (-10°F) | 9 mm | 56% | least pleasant |
| March | -2°C (28°F) | -14°C (8°F) | 13 mm | 62% | least pleasant |
| April | 9°C (47°F) | -3°C (26°F) | 22 mm | 69% | least pleasant |
| May | 16°C (61°F) | 3°C (38°F) | 41 mm | 67% | best |
| June | 24°C (76°F) | 12°C (53°F) | 57 mm | 68% | best |
| July | 26°C (80°F) | 14°C (58°F) | 85 mm | 67% | best |
| August | 23°C (74°F) | 11°C (53°F) | 82 mm | 64% | best |
| September | 15°C (60°F) | 4°C (39°F) | 47 mm | 65% | fair |
| October | 5°C (42°F) | -4°C (25°F) | 21 mm | 70% | least pleasant |
| November | -6°C (22°F) | -13°C (8°F) | 15 mm | 73% | least pleasant |
| December | -15°C (6°F) | -22°C (-8°F) | 16 mm | 67% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Irkutsk Oblast in May
Weather can differ a lot within Irkutsk Oblast: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Irkutsk | 16°C (61°F) | 3°C (38°F) | 41 mm | best |
| Bratsk | 13°C (55°F) | 3°C (38°F) | 55 mm | fair |
| Angarsk | 17°C (62°F) | 3°C (38°F) | 43 mm | best |
| Ust’-Ilimsk | 13°C (55°F) | 2°C (35°F) | 59 mm | fair |
| Usol’ye-Sibirskoye | 16°C (60°F) | 3°C (37°F) | 42 mm | best |
| Cheremkhovo | 16°C (61°F) | 3°C (37°F) | 46 mm | best |
| Tulun | 15°C (59°F) | 2°C (36°F) | 57 mm | fair |
| Ust’-Kut | 12°C (53°F) | 0°C (33°F) | 60 mm | fair |
| Shelekhov | 16°C (60°F) | 4°C (39°F) | 50 mm | fair |
| Sayansk | 15°C (60°F) | 3°C (37°F) | 49 mm | best |
| Nizhneudinsk | 14°C (57°F) | 2°C (35°F) | 72 mm | fair |
| Tayshet | 14°C (58°F) | 3°C (37°F) | 66 mm | fair |