The climate in Altay during September can be summarized as cool and reasonably dry.
September is in the fall / autumn in Altay and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 15°C (58°F), whilst at night 0°C (32°F) is normal.
| Daytime temperature | 14.7°C 58.4°F |
|---|---|
| Nightly temperature | 0.2°C 32.3°F |
| Average temperature | 7.4°C 45.3°F |
| Daily sunshine | 8.8 hrs |
| Avg rainfall | 34 mm 1.3 ins |
| Rainy days | 9 days |
| Sea temperature | 13.8°C 56.9°F |
| Humidity | 60% |
| Windspeed | 5.4kph 3 mph |
On average September is the 4th wettest month of the year in Altay with around 34mm 1.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.8 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Altay in September 2025.
Best places to visit in September
| Hottest month: | July | 21.4°C 70.5°F |
|---|---|---|
| Driest month: | February | 5mm 0.2ins |
| Sunniest month: | March | 8.5hrs |
| Coldest month: | January | -24.2°C -11.6°F |
| Wettest month: | July | 82mm 3.2ins |