You can expect about 3 to 8 days of rain in Irkutsk during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Please note that Irkutsk can expect a few days of snow in September.

Our weather forecast can give you a great sense of what weather to expect in Irkutsk in September 2026.

If you’re planning to visit Irkutsk in the near future, we highly recommend that you review the 14 day weather forecast for Irkutsk before you arrive.

Temperatures

15° / 4°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

9.7

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1 24° /10°	2 19° /8°	3 16° /7°	4 15° /6°	5 17° /5°
6 16° /7°	7 16° /7°	8 18° /7°	9 18° /6°	10 14° /7°	11 14° /5°	12 18° /5°
13 17° /6°	14 16° /7°	15 14° /6°	16 13° /5°	17 15° /5°	18 14° /5°	19 17° /4°
20 18° /5°	21 16° /8°	22 10° /6°	23 13° /5°	24 15° /7°	25 15° /7°	26 14° /7°
27 14° /7°	28 12° /8°	29 8° /-2°	30 4° /-2°

Explore the weather in Irkutsk in other months

Irkutsk annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	-14° / -24°	2	10	19	20 mm	Awful	Irkutsk in January
February	-11° / -23°	3	8	17	18 mm	Awful	Irkutsk in February
March	-2° / -13°	5	7	19	35 mm	Awful	Irkutsk in March
April	8° / -2°	5	12	13	48 mm	Bad	Irkutsk in April
May	16° / 3°	6	21	4	74 mm	Ok	Irkutsk in May
June	24° / 9°	6	24	0	85 mm	Perfect	Irkutsk in June
July	26° / 12°	7	24	0	127 mm	Good	Irkutsk in July
August	23° / 10°	7	24	0	124 mm	Good	Irkutsk in August
September	15° / 4°	6	22	2	75 mm	Ok	Irkutsk in September
October	6° / -2°	4	17	10	32 mm	Awful	Irkutsk in October
November	-5° / -12°	3	10	17	25 mm	Awful	Irkutsk in November
December	-12° / -20°	3	9	19	25 mm	Awful	Irkutsk in December