The highest day temperature in September 2025 was 68°F. The lowest night temperature was 30°F. The average values for day and night temperatures during September were 54.7°F и 52.0°F respectivly.

Most of the days in September are gloomy but you can also expect sunny days.

Precipitation total in September for Achinsk is 0.6 in.

The average wind speed in September is 7.3 mph. It makes September one of the most windless months of the year for Achinsk.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Achinsk in September is 5.3 hours.