Helena weather in December 2020

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  • 0°C maximum daytime temperature in December in Helena0
    0°C max day temperature
  • 3 hours of sunshine per day
  • 9 days with some rainfall in December in Helena9
    9 days with some rainfall
  • -12°C minimum night-time temperature in December in Helena-12
    -12°C min night temperature
  • 9 hours of daylight per day in December in Helena9
    9 hours of daylight per day
  • No heat & humidity in December in Helena0
    No heat & humidity
  • 16 mm monthly rainfall in December in Helena16
    16 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Helena1
    1 (Low) UV index

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The December weather guide for Helena, Montana shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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How cold is it in Helena in December?

Daytime temperatures usually reach -0°C in Helena in December, falling to -12°C at night.

How sunny is it in Helena in December?

There are normally 3 hours of bright sunshine each day in Helena in December - that's 37% of daylight hours.

Does it rain in Helena in December?

There are usually 9 days with some rain in Helena in December and the average monthly rainfall is 16mm. Rain may fall as snow in this month.

Helena sunrise & sunset times for December 2020

Browse the sunrise & sunset times for Helena in December 2020. Select a month to view Helena sunrise & sunset times for the next twelve months.


Date Sunrise times Sunset times
Tuesday, 1st December 2020 07:52 16:42
Wednesday, 16th December 2020 08:07 16:41
Thursday, 31st December 2020 08:12 16:51
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where is warm in Montana in December for 2020/2021?

Below are average maximum temperatures at popular destinations in Montana in December. Select a destination to see more weather parameters.

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