Helena (MT) Climate by Month
Helena experiences great temperature shifts.
The city's weather can transition from warm days
to very cold weather.
It typically sees modest rain/snowfall throughout the year.
Let's now guide you through the climate details for a complete overview.
Average day and night temperature
The climate in Helena is known for significant temperature differences throughout the year, making the weather dynamic. Typically, daytime temperatures range from a comfortable 29°C in July to a very cold -0°C in the coolest month, December. Nights are cooler, with temperatures generally dropping to -10°C, particularly during the colder months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Helena has a relatively dry climate with low precipitation, averaging 373 mm of rain/snowfall annually. The climate in Helena shows significant variation throughout the year. Expect moderate rainfall in May, with an average of 59 mm of precipitation over 15 rainy days. In contrast, January offers drier and sunnier days, with around 17 mm of snowfall over 11 snowy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
For those who appreciate different seasons, Helena serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 12.3 hours of sunshine daily, and embrace the darker days in December, offering only 3.3 hours of daily sunlight.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is low throughout the year in Helena.
Relative humidity over the year
The best time of year to visit Helena in the United States of America
During the months of June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Yes, the months of January and February are very dry.
The coldest season / winter is in the following months: January, February and December.
July has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is December with an average maximum temperature of -0°C.
May tops the wettest month list with 59 mm of rainfall.
January is the driest month with 17 mm of precipitation.
July is the sunniest month with an average of 370 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
