Altai Krai weather in September
September is one of the best months to visit Altai Krai: highs of 17°C (63°F) and about 35 mm (1.4 in) of rain on average. Nights average 6°C (42°F) and cloud cover 62% (NASA POWER, 2001–2025 averages). It is the 5th driest month of the year and the 5th warmest. Compared with August, it is cooler and about as wet; October brings highs of 7°C (45°F) and 49 mm (1.9 in) of rain.
Figures are long-term averages for Barnaul, the largest city in Altai Krai. See below for other places.
Is September a good time to visit Altai Krai?
best month Weather score 73/100.
Yes. September is one of the best months for weather in Altai Krai.
Does it rain a lot in Altai Krai in September?
No, it is usually dry: about 35 mm (1.4 in) falls in an average September. It is the 5th driest month of the year.
How warm is Altai Krai in September?
Days average 17°C (63°F) and nights 6°C (42°F).
Altai Krai weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -15°C (5°F) | -23°C (-9°F) | 27 mm | 64% | least pleasant |
| February | -11°C (12°F) | -20°C (-4°F) | 24 mm | 63% | least pleasant |
| March | -3°C (27°F) | -11°C (11°F) | 29 mm | 65% | least pleasant |
| April | 9°C (48°F) | -2°C (28°F) | 32 mm | 62% | least pleasant |
| May | 18°C (64°F) | 5°C (41°F) | 46 mm | 59% | best |
| June | 24°C (76°F) | 13°C (55°F) | 49 mm | 58% | best |
| July | 27°C (80°F) | 15°C (59°F) | 61 mm | 62% | best |
| August | 25°C (77°F) | 12°C (54°F) | 38 mm | 55% | best |
| September | 17°C (63°F) | 6°C (42°F) | 35 mm | 62% | best |
| October | 7°C (45°F) | -2°C (29°F) | 49 mm | 71% | least pleasant |
| November | -4°C (25°F) | -11°C (13°F) | 51 mm | 77% | least pleasant |
| December | -12°C (10°F) | -20°C (-3°F) | 38 mm | 69% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Altai Krai in September
Weather can differ a lot within Altai Krai: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Barnaul | 17°C (63°F) | 6°C (42°F) | 35 mm | best |
| Biysk | 18°C (65°F) | 6°C (43°F) | 41 mm | best |
| Rubtsovsk | 19°C (65°F) | 6°C (43°F) | 27 mm | best |
| Novoaltaysk | 17°C (63°F) | 6°C (42°F) | 35 mm | best |
| Zarinsk | 17°C (62°F) | 5°C (42°F) | 38 mm | best |
| Kamen’-na-Obi | 17°C (62°F) | 6°C (42°F) | 32 mm | best |
| Slavgorod | 18°C (64°F) | 6°C (44°F) | 28 mm | best |
| Aleysk | 18°C (64°F) | 6°C (42°F) | 29 mm | best |
| Yarovoye | 18°C (64°F) | 6°C (44°F) | 28 mm | best |
| Yuzhnyy | 17°C (63°F) | 6°C (42°F) | 35 mm | best |
| Tal’menka | 17°C (62°F) | 5°C (41°F) | 38 mm | best |
| Gornyak | 19°C (65°F) | 6°C (43°F) | 27 mm | best |