Weather in Boulder in January
Boulder, United States averages a high of 4°C (39.2°F) and low of -9°C (15.8°F) in January, with 5 rain days and 8.4 hours of daily sunshine. Travel score: 57.8/100 (Mixed). The best time to visit Boulder is August.
High
4°C39°F
Low
-9°C16°F
🌧️
5
rain days
☀️
8.4
hrs/day sunshine
💧
64%
humidity
58— Mixed
January in Boulder is cold and mostly dry — bring heavy winter clothing.
What are the average temperatures in Boulder?
How much does it rain in Boulder in January?
Boulder receives an average of 23.6mm of rainfall across 5 rainy days in January. The annual total is 586.4mm.
What should I pack for Boulder in January?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Heavy winter coat
Cold weather with highs around 4°C
🩳
Thermal base layers
Stay warm in freezing temperatures
🧤
Warm gloves
Cold nights around -9°C
🧣
Warm scarf
Protect against cold winds
Traveling to United States in January?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
🏛️ 121 countries·📅 Updated yearly·✈️ Free forever
Compare Boulder
Popular comparisons:
How can I plan my trip to Boulder?
What other cities are near Boulder?
What are other popular cities in United States?
What is the weather like in other months in Boulder?
Data based on 1994–2024 averages · Last updated: 2024-12-31