December Weather in Las Vegas is very refreshing in the daytime in the Sun and just a slight bit chilly in the shade. You will notice a big difference when the Sun goes down. Nights in December get pretty chilly but if you are walking down the strip You can find some warm air from the lights and the heat that all the Casinos are losing. Downtown in the cold is usually not a problem even though the Fremont Street Experience is outside its protected from the Wind.
The following information is based on the national weather service database:
You can expect these averages, however the summer of 2010 proved to be a bit hotter.
January average high is 58° F (14° C) and average low is 34° F (1° C)
February average high is 63° F (17° C)and average low is 39° F (4° C)
March average high is 69° F (21° C)and average low is 44° F (7° C)
April average high is 78° F (26° C)and average low is 51° F (11° C)
May average high is 88° F (31° C)and average low is 60° F (16° C)
June average high is 100° F (38° C)and average low is 69° F (21° C)
July average high is 106° F (41° C)and average low is 74° F (23° C)
August average high is 103° F (39° C)and average low is 74° F (23° C)
September average high is 95° F (35° C)and average low is 66° F (19° C)
October average high is 82° F (28° C)and average low is 54° F (12° C)
November average high 67° F (19° C)and average low is 43° F (6° C)
December average high is 58° F (14° C)and average low is 34° F (1° C)
There are exceptions like July 2010 set a record by averaging over 100 degrees the entire month. The 100 degree mark would already be reached shortly after 10 am and not dipping below 100 until after or near midnight. More hours were over 100 than under 100 degrees to make that record.
Example of extreme changes in average Temperatures is the Snow that came in December 2008. Not just flurries but thick heavy snow. It was a treat for Las Vegas since it is extremely rare. Most of the year you can bet on the weather being hot or mild. Remember that Hotel rates are lowest when the weather is considered extremely hot, but don't stay away just because the weather is hot, there are plenty of pools to cool off in and remember It's Dry Heat!
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