Weather in Thornton in December
Thornton, United States averages a high of 4.7°C (40.5°F) and low of -8.6°C (16.5°F) in December, with 4 rain days and 8 hours of daily sunshine. Travel score: 60/100 (Good). The best time to visit Thornton is August.
High
5°C40°F
Low
-9°C17°F
🌧️
4
rain days
☀️
8
hrs/day sunshine
💧
60%
humidity
60— Good
December in Thornton is cold and mostly dry — bundle up and enjoy the cool weather.
What are the average temperatures in Thornton?
How much does it rain in Thornton in December?
Thornton receives an average of 20mm of rainfall across 4 rainy days in December. The annual total is 466.7mm.
What should I pack for Thornton in December?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Heavy winter coat
Cold weather with highs around 5°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 December?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31