Click on a day for an hourly weather forecast
The weather in Rockville in December is very cold with temperatures between 1°C and 8°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Rockville during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Rockville can expect a few days of snow in December.
Our weather forecast can give you a great sense of what weather to expect in Rockville in December 2024.
If you’re planning to visit Rockville in the near future, we highly recommend that you review the 14 day weather forecast for Rockville before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -3° | 7 | 21 | 3 | 79 mm | Awful | Rockville in January |
| February | 7° / -1° | 8 | 17 | 4 | 87 mm | Awful | Rockville in February |
| March | 12° / 2° | 7 | 22 | 2 | 95 mm | Awful | Rockville in March |
| April | 18° / 8° | 8 | 22 | 0 | 116 mm | Ok | Rockville in April |
| May | 23° / 13° | 10 | 21 | 0 | 117 mm | Good | Rockville in May |
| June | 28° / 18° | 10 | 20 | 0 | 119 mm | Good | Rockville in June |
| July | 31° / 21° | 11 | 20 | 0 | 132 mm | Ok | Rockville in July |
| August | 30° / 20° | 12 | 19 | 0 | 122 mm | Ok | Rockville in August |
| September | 26° / 17° | 8 | 22 | 0 | 125 mm | Good | Rockville in September |
| October | 19° / 11° | 7 | 24 | 0 | 119 mm | Ok | Rockville in October |
| November | 12° / 4° | 5 | 25 | 0 | 84 mm | Ok | Rockville in November |
| December | 8° / 1° | 7 | 22 | 2 | 111 mm | Awful | Rockville in December |