Baltimore, Maryland weather in December

Averages from 2021–2025 (155 days of record).

Average high: 47°F
Average low: 32°F
Rainy days: ~9 per month
Total precipitation: 4.4 in
Warmest recorded: 69°F
Coldest recorded: 6°F

Expect December days in Baltimore, Maryland to top out around 47°F and cool to about 32°F overnight, with roughly 9 days of measurable rain across the month. In recent years December has ranged from 6°F to 69°F.

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Current Baltimore, Maryland forecast → · Historical data by Open-Meteo (ERA5).