Fairfax Weather in December

Thinking of visiting Fairfax in December? Expect low temperatures reaching 9°C (48°F) during the day, dropping to -1°C (30°F) at night, and note that quite a bit of snow/rainfall is likely.

Rainfall in Fairfax in December

Historically, approximately 11 days this month are expected to have snow/rain, averaging 99 mm (3.9 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Fairfax in December

Daytime temperatures in Fairfax reach 9°C (48°F) in December, dropping to -1°C (30°F) at night. The winter season is characteristic of December. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. With overnight lows of -1°C (30°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold.

Sunshine in Fairfax in December

The area enjoys a balanced 130 hours of sunlight, ensuring it's neither too overcast nor too sunny.

Wind Speed in Fairfax in December

Wind speeds average 4 m/s (8 knots) during December. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

December in Fairfax has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.

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Check the conditions for any month of the year.

• 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 Fairfax's climate page.

Fairfax Temperature in December

Min Temperature -1°C (30°F)  

Max Temperature 9°C (48°F)  

Chance of Rain 37%  

Precipitation 99 mm (3.9 in)  

Rainy days 11 days  

Humidity 64% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 130 hours *  

Percentage Sunshine 45% *  

* Data from: Washington DC, the United States of America (23 KM, 14 Miles).

What to Wear in Fairfax in December

We recommend to layer up for chilly conditions in Fairfax 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. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Fairfax in December

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

Swimming

5/10

Cycling

4/10

Walking

4/10

Camping

1/10

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 Fairfax's climate page.

More climate data for Fairfax

Temperature Rainfall Sunshine Humidity Wind Speed

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