For the past few decades, the average daily temperatures in USA during January have been around +50°F.
The weather differs across the USA in January. You may encounter maximum temperatures of +50°F at noon in Honolulu and +32°F in Chicago. So plan your activities, and packing, based on the individual locations rather than the country as a whole.
Temperature, wind and humidity in January
Average
Atlanta
Boston
Chattanooga
Chicago
Dallas
Denver
Detroit
Fort Lauderdale
Fort Myers
Honolulu
Houston
☀️
+50°F
Avg. max. temperature
-29°F
Min.
+86°F
Max.
57 mm
Total precipitation
71%
Avg. humidity
3 m/s
Avg. wind
6 ☀️
Sunny Days
12 ⛅️
Cloudy
7 🌦
Rainy
Our opinion: USA has OK weather in January.
USA in January – what city is the…
rainiest? Chattanooga, with an average of 4 mm of rain and humidity of 70%;
warmest? Honolulu, with daytime temperatures averaging +79°F;
windiest? Honolulu, with an average of 4 m/s;
coolest? Chicago, with daytime temperatures averaging +32°F;
How good is the weather in USA in January?
During January, the USA is characterized by variable weather with air pressure around 1015 HPa and therefore elements of sun, rain, and wind – with a little extra emphasis on the latter two. The humidity in January ranges between 60% in Denver and 75% in Detroit.
Variable weather with sun, rain and wind: +50°F in average daily temperature.
This is how hot it usually is in January
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 January:
Average
Atlanta
Boston
Chattanooga
Chicago
Dallas
Denver
Detroit
Fort Lauderdale
Fort Myers
Honolulu
Houston
Average maximum temperature for the month: +50°F;
Average minimum temperature for the month: +36°F;
Highest monthly temperature: +52°F;
Lowest monthly temperature: +34°F;
Monthly temperatures:
Average
Atlanta
Boston
Chattanooga
Chicago
Dallas
Denver
Detroit
Fort Lauderdale
Fort Myers
Honolulu
Houston
Warmest: July with an average +86°F during the day;
Coldest: January with an average +50°F of the day;
Hottest month in hottest city: July in Honolulu;
Coldest month in coolest city: January in Chicago;
Can you swim in USA in January?
Here are the minimum and maximum water temperatures in cities in USA in January:
Fort Lauderdale
🏊
Comfortable
68°F - 75°F
Honolulu
🏊
Comfortable
75°F - 77°F
You can definitely swim in Fort Lauderdale, Honolulu in January, with the water temperature of +68°F and up.
Winds in USA during January
Wind speed in USA in January based on historical data:
Average
Atlanta
Boston
Chattanooga
Chicago
Dallas
Denver
Detroit
Fort Lauderdale
Fort Myers
Honolulu
Houston
January tends to offer light winds averaging 3 m/s. However, coastal cities may experience breezes during the mornings and afternoons.
Comparison between cities in January:
Highest average wind speed: Honolulu with 4 m/s;
Lowest average wind speed: Chattanooga with 1 m/s;
Windiest day of the month: Honolulu with 4 m/s;
The least windy day of the month: Chattanooga with 1 m/s;
Humidity and precipitation in USA in January
Amount of rainfall in mm during January in USA based on historical data:
Average
Atlanta
Boston
Chattanooga
Chicago
Dallas
Denver
Detroit
Fort Lauderdale
Fort Myers
Honolulu
Houston
January tends to be an extremely humid month with 70% humidity and 85 mm rainfall. In general the humidity tends to be a little lower in mountainous regions and more humid closer to water.
Comparison between cities in January:
Average
Atlanta
Boston
Chattanooga
Chicago
Dallas
Denver
Detroit
Fort Lauderdale
Fort Myers
Honolulu
Houston
Highest average rainfall: Chattanooga with 109 mm;
Lowest average rainfall: Denver with 4 mm;
Most number of rainy days: Fort Lauderdale with 14 rainy days;
Least number of rainy days: Denver with 1 rainy days;
Highest risk of rain during the day: Fort Lauderdale with 45%;
Least risk of rain during the day: Denver with 3%;
Highest average humidity: Detroit with 75%;
Lowest average humidity: Denver with 60%;
Snow
Amount of snow in mm. during January in USA based on historical data:
Average
Atlanta
Boston
Chattanooga
Chicago
Dallas
Denver
Detroit
Fort Lauderdale
Fort Myers
Honolulu
Houston
Total snow in January is about 6 mm, with a 6% chance of snow on a typical day.
Comparison between cities in January:
Average
Atlanta
Boston
Chattanooga
Chicago
Dallas
Denver
Detroit
Fort Lauderdale
Fort Myers
Honolulu
Houston
Highest average snowfall: Boston with 31 mm;
Lowest average snowfall: Fort Lauderdale with 0 mm;
Most number of snowy days: Detroit with 11 snowy days;
Least number of snowy days: Fort Lauderdale with 0 snowy days;
Highest chance of snow during the day: Detroit with 35%;
Least chance of snow during the day: Fort Lauderdale with 0%;
Tips for traveling to USA in January
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 January is expected to bring. The advice applies to the country as a whole – local weather and possible activities may differ somewhat.
rainy, mild weather with light winds and very high humidity in January
Pack right for January
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.
For light showers, an umbrella or a thin and light rain cape is usually sufficient, while more rain may require rainwear and rain boots.
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 January:
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 January a good time to visit USA?
It’s always a good time to visit USA, but the weather is changeable in January, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
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.