Grantsville Weather in December

What's the weather like in Grantsville (Utah) in December 2025?

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

December is in the winter in Grantsville and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a freezing 4°C (39°F), whilst at night -6°C (22°F) is normal.

Grantsville weather averages (imperial / metric)
Daytime temperature 3.8°C 38.8°F
Nightly temperature -5.8°C 21.7°F
Average temperature -1°C 30.2°F
Daily sunshine 4.6 hrs
Avg rainfall 26 mm 1 ins
Rainy days 9 days
Sea temperature 11.5°C 52.8°F
Humidity 72%
Windspeed 13.7kph 9 mph

On average December is the 6th wettest month of the year in Grantsville with around 26mm 1 inches of rain making it a dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 4.6 hours of sunshine per day.

December temperatures in Grantsville

Grantsville average temperature in December

December rainfall

Grantsville average rain in December

December hourly sunshine

Grantsville 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 Grantsville in December 2025.

Other monthly averages

Best places to visit in December

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Grantsville weather stats

Grantsville weather statistics
Hottest month: July 32.5°C 90.5°F
Driest month: July 17mm 0.7ins
Sunniest month: July 12.9hrs
Coldest month: January 2.9°C 37.2°F
Wettest month: April 46mm 1.8ins
Map showing location of Grantsville (40.59994, -112.4644) Grantsville map pin © Google

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