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Yellowstone — weather in September

15°C Daytime temperatures 4°C Night temperatures 21 Sunny days 11.7-13.2 Sun (hours) 4 Rainy days 49 mm Precipitation 0°C water temperature
Air temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013
The maximum daily temperature 29°C — 2 September 2013.
The maximum night temperature 13°C — 8 September 2022.
The minimum daily temperature 0.5°C — 19 September 2017.
The minimum night temperature -11°C — 12 September 2014.
Sunny, cloudy and gloomy days
Precipitation, mm
Maximum precipitation 116.6 mm — May. Minimum precipitation 37.3 mm — July.
Wind speed, km / h
Maximum wind speed 12.4 km / h — February. Minimum wind speed 10.1 km / h — January.
Number of hours of sunshine
The maximum number of hours of sunshine per day 12.5 h. — July. The minimum number of hours of sunshine per day 3 h. — December.
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