Rockville (MD)
December
Weather in Rockville, Maryland for December 2026
Your guide to Rockville weather in December - trends and predictions
Rockville typically experiences moderate snowfall in December, with an average of 6 snowy days.
In general, the average temperature in Rockville at the beginning of December is 3.7 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 6.1 °C by the end of December.
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Snow Forecast ❄️
Temperatures
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14
Dry days
11
Rainy days
6
Snow days
5°/-1°
Temperatures
18 km/h
Avg max wind
73 %
Avg humidity
Rockville Weather December
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Temperatures trend during December in Rockville
See the weather trend as well as the moving average line
December weather in Rockville day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Overcast | 4° /-2° | 0 mm | 0 cm | |
| Dec. 2 |  Sunny | 3° /-2° | 41.8 mm | 0 cm | |
| Dec. 3 | Sunny | 5° /-3° | 0 mm | 0 cm | |
| Dec. 4 | Overcast | 4° /-3° | 0 mm | 0 cm | |
| Dec. 5 |  Patchy rain possible | 2° /-5° | 5.3 mm | 3.5 cm | |
| Dec. 6 | Sunny | 4° /-2° | 0 mm | 0 cm | |
| Dec. 7 |  Partly cloudy | 4° /-2° | 0 mm | 0 cm | |
| Dec. 8 |  Cloudy | 7° /-2° | 0 mm | 0 cm | |
| Dec. 9 |  Moderate or heavy rain shower | 5° /-2° | 5.1 mm | 0 cm | |
| Dec. 10 | Patchy rain possible | 7° /2° | 1.4 mm | 0 cm | |
| Dec. 11 | Moderate or heavy rain shower | 7° /-1° | 29.2 mm | 0 cm | |
| Dec. 12 | Sunny | 3° /-2° | 0 mm | 0 cm | |
| Dec. 13 | Overcast | 4° /-2° | 0 mm | 0 cm | |
| Dec. 14 | Overcast | 1° /-5° | 9.1 mm | 6.6 cm | |
| Dec. 15 | Patchy rain possible | 1° /-4° | 3.7 mm | 0.5 cm | |
| Dec. 16 |  Heavy rain at times | 6° /-1° | 5.8 mm | 0 cm | |
| Dec. 17 | Overcast | 9° /2° | 0 mm | 0 cm | |
| Dec. 18 | Moderate rain at times | 8° /-1° | 2.5 mm | 0 cm | |
| Dec. 19 | Sunny | 9° /-1° | 25 mm | 0 cm | |
| Dec. 20 |  Light freezing rain | 3° /-2° | 0.6 mm | 0 cm | |
| Dec. 21 | Overcast | 5° /-2° | 0 mm | 0 cm | |
| Dec. 22 | Sunny | 2° /-5° | 0 mm | 0 cm | |
| Dec. 23 | Overcast | 3° /-3° | 3.3 mm | 1 cm | |
| Dec. 24 | Light freezing rain | 6° /0° | 0.2 mm | 0 cm | |
| Dec. 25 | Cloudy | 4° /0° | 6.2 mm | 0.5 cm | |
| Dec. 26 | Cloudy | 2° /-2° | 3.2 mm | 2.3 cm | |
| Dec. 27 | Overcast | 4° /0° | 1.6 mm | 0 cm | |
| Dec. 28 | Moderate or heavy rain shower | 5° /0° | 10.4 mm | 0 cm | |
| Dec. 29 | Patchy rain possible | 14° /3° | 2.7 mm | 0 cm | |
| Dec. 30 | Partly cloudy | 8° /2° | 5.1 mm | 0 cm | |
| Dec. 31 |  Fog | 6° /-1° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for Rockville in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Rockville forecast closer to your planned date for the most up-to-date weather information.
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Rockville in December - FAQ
What are the expected maximum and minimum temperatures in Rockville during December?
Brace for cold days with temperatures not exceeding 5° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Rockville during December?
Significant rainfall exceeding 162.3 mm is expected in Rockville during December, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Rockville in December 2026?
Rockville experiences an average snowfall of 14.375 cm during December, occurring over 6 days.
What are the typical wind conditions in Rockville during December?
The average wind speed in Rockville during December is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
Rockville snow forecast December 2026
Track daily snowfall levels and discover Rockville’s snowy potential this December ❄️
On average, Rockville sees 6 snowy days during December, with approximately 14.4 cm of total snowfall.
December rainfall patterns in Rockville
Explore the daily rainfall trends and prepare for Rockvilles December weather 💧
Typically, Rockville has 11 rainy days in December with a total of 162.3 mm of rainfall.
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