Castle Rock Weather in January

January in Castle Rock typically sees daytime highs of 7°C (45°F) and nighttime lows of -8°C (18°F). With the least snow/rainfall of the year, it's a reliably dry month. It falls within the winter season.

Rainfall in Castle Rock in January

Expect the least amount of rain this month, making it a good opportunity for outdoor activities, even though days are on the cooler side. Historically, approximately 5 days this month are expected to have snow/rain, averaging 14 mm (0.6 in). When rain does fall, showers tend to be light and brief. Most days will be dry.

Temperature in Castle Rock in January

In January, Castle Rock gets low temperatures, with highs of 7°C (45°F). Nights cool to around -8°C (18°F). January is part of the winter season. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. At -8°C (18°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating.

Sunshine in Castle Rock in January

The city usually sees around 215 hours of sunlight, indicating many sunny days despite the cool temperatures, making it a good month for sightseeing.

January in Castle Rock can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Castle Rock's climate page.

Castle Rock Temperature in January

Min Temperature -8°C (18°F)  

Max Temperature 7°C (45°F)  

Chance of Rain 17%  

Precipitation 14 mm (0.6 in)  

Rainy days 5 days  

Humidity 55% *  

Sunshine 215 hours *  

Percentage Sunshine 72% *  

* Data from: Denver, the United States of America (42 KM, 26 Miles).

What to Wear in Castle Rock in January

Dress warmly and in layers for your trip to Castle Rock in January. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Dry conditions mean you won't need to worry about rain protection. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Castle Rock in January

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

2/10

Outdoor sports

4/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Castle Rock's climate page.

More climate data for Castle Rock

Temperature Rainfall Sunshine Humidity

See the full Castle Rock climate overview or explore weather in the United States of America.