Janesville Weather in December

Janesville in December sees very low daytime temperatures of 1°C (34°F) and nighttime lows of -8°C (18°F). Rainfall is fairly high this month at around 76 mm (3 in), so pack a rain jacket to stay dry.

Rainfall in Janesville in December

Typically around 12 days of snow/rainfall are expected, averaging 76 mm (3 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Janesville in December

Janesville in December gets highs of 1°C (34°F) during the day and drops to -8°C (18°F) at night. The winter season is characteristic of December. Expect a distinctly cold feel throughout the day, not just overnight. 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. Prepare for a very cold month by layering your clothing. It's always better to be prepared for the cold than to face it unprotected.

Sunshine in Janesville in December

The month experiences a moderate amount of sunlight, with 107 hours of sunshine. This provides a nice balance between sunshine and clouds.

December in Janesville 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.

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

Janesville Temperature in December

Min Temperature -8°C (18°F)  

Max Temperature 1°C (34°F)  

Chance of Rain 40%  

Precipitation 76 mm (3 in)  

Rainy days 12 days  

Humidity 77% *  

Sunshine 107 hours *  

Percentage Sunshine 39% *  

* Data from: Madison, the United States of America (51 KM, 31 Miles).

What to Wear in Janesville in December

We recommend to layer up for chilly conditions in Janesville in December. 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. Rain is likely on several days, so bring a good rain jacket. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Janesville in December

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

Swimming

5/10

Cycling

2/10

Walking

2/10

Camping

1/10

Outdoor sports

2/10

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 Janesville's climate page.

More climate data for Janesville

Temperature Rainfall Sunshine Humidity

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