Helena, MT Weather

Helena has a semi-arid climate , with long, cold and moderately snowy winters, hot and dry summers, and short springs and autumns in between. The monthly daily average temperature ranges from 6.5 °F (−14.2 °C) in January to 69.7 °F (20.9 °C) in August. Snowfall has been observed in every month but July, but is usually absent from May to September, and normally accumulates in only light amounts. Winters have periods of moderation, partly due to warming influence from chinooks. Precipitation mostly falls in the spring and is generally sparse, averaging only 11.6 inches (295 mm) annually.