Boulder Weather in January
January in Boulder brings low temperatures, with highs of 8°C (46°F) and nights dropping to -6°C (21°F). It's also the driest month of the year, ideal for those who want to avoid rain.
Rainfall in Boulder in January
Take advantage of the dry conditions this month, with minimal rain expected, even if it's a cooler time of year. This month experiences about 5 days of snow/rain according to historical data, averaging 16 mm (0.6 in). The odd shower may pass through, but it usually doesn't amount to much. A largely dry month overall.
Temperature in Boulder in January
January in Boulder sees highs of 8°C (46°F) and lows of -6°C (21°F) overnight. Winter occurs in January. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. Nights drop below freezing to -6°C (21°F). An extra blanket is worth packing if you're unsure about the heating where you're staying.
Sunshine in Boulder in January
The month enjoys around 215 hours of sunshine, creating mostly sunny days despite the cool temperatures.Should you favor a climate that's both dry and comfortably warm, May, June and September typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Boulder's climate page.
Boulder Temperature in January
Min Temperature
-6°C (21°F)
Max Temperature
8°C (46°F)
Chance of Rain
18%
Precipitation
16 mm (0.6 in)
Rainy days
5 days
Humidity
55% *
Sunshine
215 hours *
Percentage Sunshine
72% *
Best Places in the United States of America in January
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in January →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Boulder in January
We recommend to layer up for chilly conditions in Boulder in January. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. Almost no rain is expected, so no need to bring rain gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Boulder in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Boulder's climate page.
Temperature Rainfall Sunshine Humidity
See the full Boulder climate overview or explore weather in the United States of America.
