Sisters Weather in December

With daytime temperatures of 4°C (39°F) and nighttime lows of -6°C (21°F), December in Sisters brings low temperatures during the day. It is also the wettest month of the year, so pack an umbrella.

Rainfall in Sisters in December

Being the wettest month, having an umbrella on standby can help you avoid getting caught in the rain. You can expect snow/rain on roughly 17 days based on historical data, averaging 72 mm (2.8 in) for the month. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.

Temperature in Sisters in December

Temperatures in Sisters in December top out at 4°C (39°F) and drop to -6°C (21°F) overnight. December marks the winter season. Expect a distinctly cold feel throughout the day, not just overnight. At -6°C (21°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating. The month is typically the coldest, so be sure to prepare by packing plenty of warm clothing.

If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Sisters. Our weather planner can help you explore destinations with more pleasant weather conditions.

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• January
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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 Sisters's climate page.

Sisters Temperature in December

Min Temperature -6°C (21°F)  

Max Temperature 4°C (39°F)  

Chance of Rain 57%  

Precipitation 72 mm (2.8 in)  

Rainy days 17 days  

What to Wear in Sisters in December

We recommend to layer up for chilly conditions in Sisters 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.

What To Do in Sisters in December

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

Cycling

3/10

Walking

3/10

Barbeque

1/10

Camping

1/10

Outdoor sports

3/10

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 Sisters's climate page.

More climate data for Sisters

Temperature Rainfall

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