Roundup Weather in December

What's the weather like in Roundup (Montana) in December 2024?

The climate in Roundup during December can be summarized as cold and dry.

December is in the winter in Roundup and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a freezing 2°C (35°F), whilst at night -11°C (13°F) is normal.

Roundup weather averages (imperial / metric)
Daytime temperature 1.5°C 34.7°F
Nightly temperature -10.5°C 13.1°F
Average temperature -4.5°C 23.9°F
Daily sunshine 4.4 hrs
Avg rainfall 17 mm 0.6 ins
Rainy days 8 days
Sea temperature 8°C 46.3°F
Humidity 64%
Windspeed 20.5kph 13 mph

On average December is the 2nd driest month of the year in Roundup with around 17mm 0.6 inches of rain making it a dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 4.4 hours of sunshine per day.

December temperatures in Roundup

Roundup average temperature in December

December rainfall

Roundup average rain in December

December hourly sunshine

Roundup average rain in December

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Roundup in December 2024.

Other monthly averages

Best places to visit in December

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Roundup weather stats

Roundup weather statistics
Hottest month: July 29.5°C 85.1°F
Driest month: February 13mm 0.5ins
Sunniest month: July 12.7hrs
Coldest month: January -0.3°C 31.5°F
Wettest month: May 73mm 2.9ins
Map showing location of Roundup (46.44524, -108.5418) Roundup map pin © Google

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