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Is the weather good in USA in December 2025?
Good Weather
☁️
CloudyFor the past few decades, the average daily temperatures in USA during December have been around +55°F.
The weather differs across the USA in December. You may encounter maximum temperatures of +55°F at noon in Honolulu and +43°F in Denver. So plan your activities, and packing, based on the individual locations rather than the country as a whole.
Temperature, wind and humidity in December
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
☀️
+55°F
Avg. max. temperature
-26°F
Min.
+88°F
Max.
70 mm
Total precipitation
68%
Avg. humidity
2 m/s
Avg. wind
9 ☀️
Sunny Days
10 ⛅️
Cloudy
9 🌦
Rainy
Our opinion: USA has good weather in December.
USA in December – what city is the…
- rainiest? Seattle, with an average of 5 mm of rain and humidity of 86%;
- warmest? Honolulu, with daytime temperatures averaging +81°F;
- windiest? Honolulu, with an average of 4 m/s;
- coolest? Denver, with daytime temperatures averaging +43°F;
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How good is the weather in USA in December?
During December, the USA is characterized by variable weather with air pressure around 1014 HPa and therefore elements of sun, rain, and wind – with a little extra emphasis on the latter two. The humidity in December ranges between 43% in Las Vegas and 86% in Seattle.
How warm is it in USA during December?
Variable weather with sun, rain and wind: +55°F in average daily temperature.
This is how hot it usually is in December
The average daily temperatures above don't tell you everything about how hot it can be in USA. For example, cold nights can make a big difference for those staying in tents or unheated houses. Extra hot days, on the other hand, can make a big difference for those who plan to engage in demanding physical training or competition. So here are some more temperatures for December:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
- Average maximum temperature for the month: +55°F;
- Average minimum temperature for the month: +39°F;
- Highest monthly temperature: +57°F;
- Lowest monthly temperature: +37°F;
Monthly temperatures:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
- Warmest: July with an average +86°F during the day;
- Coldest: January with an average +55°F of the day;
- Hottest month in hottest city: July in Phoenix;
- Coldest month in coolest city: December in Seattle;
Can you swim in USA in December?
Here are the minimum and maximum water temperatures in cities in USA in December:
Honolulu
🏊
Comfortable74°F - 78°F
You can definitely swim in Honolulu in December, with the water temperature of +74°F and up.
Winds in USA during December
Wind speed in USA in December based on historical data:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
December tends to offer light winds averaging 2 m/s. However, coastal cities may experience breezes during the mornings and afternoons.
Comparison between cities in December:
- Highest average wind speed: Honolulu with 4 m/s;
- Lowest average wind speed: Los Angeles with 0 m/s;
- Windiest day of the month: Honolulu with 4 m/s;
- The least windy day of the month: Los Angeles with 0 m/s;
Humidity and precipitation in USA in December
Amount of rainfall in mm during December in USA based on historical data:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
December tends to be a humid month with 61% humidity and 48 mm rainfall
Comparison between cities in December:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
- Highest average rainfall: Seattle with 166 mm;
- Lowest average rainfall: Denver with 3 mm;
- Most number of rainy days: Seattle with 20 rainy days;
- Least number of rainy days: Denver with 1 rainy days;
- Highest risk of rain during the day: Seattle with 65%;
- Least risk of rain during the day: Denver with 3%;
- Highest average humidity: Seattle with 86%;
- Lowest average humidity: Las Vegas with 43%;
Snow
Amount of snow in mm. during December in USA based on historical data:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
Total snow in December is about 4 mm, with a 4% chance of snow on a typical day.
Comparison between cities in December:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
- Highest average snowfall: Denver with 24 mm;
- Lowest average snowfall: Honolulu with 0 mm;
- Most number of snowy days: Denver with 8 snowy days;
- Least number of snowy days: Honolulu with 0 snowy days;
- Highest chance of snow during the day: Denver with 26%;
- Least chance of snow during the day: Honolulu with 0%;
Tips for traveling to USA in December
Looking for some tips for traveling to the sun, snow, or whatever you're aiming for USA? Activities, weather, and clothing are closely linked. In addition, it's important to pack only what you really need so you don't have to worry about heavy packing or paying extra baggage fees.
Here is some advice on what to pack and what kind of activities you can do in the USA based on the weather that December is expected to bring. The advice applies to the country as a whole – local weather and possible activities may differ somewhat.
Sunny, mild weather with light winds and high humidity in December
Pack right for December
The weather makes a difference when it comes to packing - especially which items should go in your suitcase. The tips below are designed to help you pack light and right without carrying more than necessary.
- Sunshine does give you a nice color and a boost of vitamin D. However, if you don't have a lot of skin pigment, you should sunbathe carefully to avoid burning yourself, getting sun rash and, in the worst case scenario, skin cancer. This is where sunscreens and opaque clothing work particularly well. Another safe way is to stay in the shade when the sun burns the most, roughly between 9 am and 3 pm.
- Cool weather is between warm and cold. This means you can bring long pants and/or a longer skirt and an extra sweater. Be aware that cool days can alternate with cold nights - it may be wise to also pack a hat, gloves and a scarf.
- Light winds are probably most comfortable in hot weather but is cooling in cool and cold weather. If it is hot (when the air temperature is about 30 degrees), the wind can have a warming effect. A thin, windproof jacket and long trousers help to counteract these effects.
- High humidity means that the air conducts heat to and from the skin more easily. For example, if the air is hot (above skin temperature), it will be harder to stay cool. On the other hand, if the air is cool or cold, it is more difficult to stay warm. In high humidity, the choice of clothing makes less of a difference. However, your physical activity plays a bigger role.
FAQ
Frequently asked questions about the weather in USA in December:
What can you do outside when it's warm in USA?
Bathing and sunbathing can be suitable. Warm (but not hot) days are also good for activities that are not so physically demanding: sightseeing on foot, by boat, on a scooter, camel riding. You can also exercise easily as long as you make sure to cool down and quench thirst.
Is December a good time to visit USA?
December is a really good time to go to USA. The weather is nice so plan your packing around outdoor activities and exploring. Check other months when is a good time to visit USA.
Monthly weather in USA
Source of the data
For this page, we’ve looked at the typical weather in USA, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
