Greater Upper Marlboro in December
5.7out of 10
Possible, with caveats
Cool: highs only around 9°C. Frequent rain: about 9 rainy days.
9°CAvg high
2°CAvg low
9Rainy days (88 mm)
9:18 hDaylight
07:24Sunrise · 16:42 Sunset
Why this score
- Cool: highs only around 9°C
- Frequent rain: about 9 rainy days
What to wear and pack
- A warm jacket
- Rain jacket or compact umbrella
- Gloves for freezing mornings
How reliable is the forecast?
Rainfall in December is fairly consistent from year to year (2.6 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 7°C | -1°C | 78 mm | 9 | – | – | 5.2 |
| February | 8°C | 0°C | 74 mm | 8 | – | – | 5.6 |
| March | 13°C | 4°C | 101 mm | 10 | – | – | 6.2 |
| April | 19°C | 9°C | 86 mm | 10 | – | – | 7.2 |
| May | 24°C | 15°C | 93 mm | 10 | – | – | 7.6 |
| June | 28°C | 20°C | 94 mm | 11 | – | – | 7.5 |
| July | 31°C | 23°C | 109 mm | 13 | – | – | 6.8 |
| August | 29°C | 22°C | 101 mm | 11 | – | – | 7.4 |
| September | 26°C | 18°C | 108 mm | 9 | – | – | 7.7 |
| October | 20°C | 12°C | 90 mm | 8 | – | – | 7.7 |
| November | 14°C | 6°C | 74 mm | 8 | – | – | 6.8 |
| December | 9°C | 2°C | 88 mm | 9 | – | – | 5.7 |
Frequently asked questions
How hot is Greater Upper Marlboro in December?
Daytime highs average 9°C and nights about 2°C.
When is the best time to visit Greater Upper Marlboro?
The best months are September, October, May, June.