Baltimore weather in December: Baltimore, Maryland: normal highs, lows, rain and records for December
Baltimore in December has a normal high of 48°F and a normal low of 30°F, a daily mean of 39°F, falling from 52°F on the 1st to 44°F by the 31st. Measurable precipitation falls on 10 days in a normal December, 3.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 9°C and low of −1°C, 94 mm of precipitation and 6 cm of snow in December.
- NOAA stationBaltimore Wash International Airport
- Station IDUSW00093721
- Location39.17°N 76.68°W
- Elevation156 ft (48 m)
- From the center10 miles
- Population568,271
- Jan 43° 25°
- Feb 46° 27°
- Mar 55° 34°
- Apr 67° 44°
- May 76° 53°
- Jun 84° 63°
- Jul 89° 68°
- Aug 87° 66°
- Sep 80° 59°
- Oct 68° 47°
- Nov 57° 37°
- Dec 48° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Baltimore in December?
The normal high is 48°F and the normal low 30°F, for a daily mean of 38.6°F. December is 8.3°F cooler than November and 4.3°F warmer than January. December is the 10th warmest month of the year in Baltimore and the 8th wettest. Across the month the normal high falls 8°F, from 52°F on December 1 to 44°F on December 31. From one year to the next December's mean temperature typically moves about 3.7°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 35°F and 42°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 52°F | 33°F | 32% | 20% |
| December 8 | 50°F | 31°F | 33% | 20% |
| December 15 | 48°F | 30°F | 33% | 21% |
| December 22 | 46°F | 28°F | 33% | 20% |
| December 31 | 44°F | 27°F | 33% | 20% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 52°F | 33°F | 32% | 20% | 9 h 40 min |
| December 2 | 51°F | 32°F | 32% | 20% | 9 h 40 min |
| December 3 | 51°F | 32°F | 32% | 20% | 9 h 40 min |
| December 4 | 51°F | 32°F | 33% | 20% | 9 h 30 min |
| December 5 | 50°F | 32°F | 33% | 20% | 9 h 30 min |
| December 6 | 50°F | 32°F | 33% | 20% | 9 h 30 min |
| December 7 | 50°F | 31°F | 33% | 20% | 9 h 30 min |
| December 8 | 50°F | 31°F | 33% | 20% | 9 h 30 min |
| December 9 | 49°F | 31°F | 33% | 20% | 9 h 30 min |
| December 10 | 49°F | 31°F | 33% | 20% | 9 h 30 min |
| December 11 | 49°F | 31°F | 33% | 20% | 9 h 30 min |
| December 12 | 48°F | 30°F | 33% | 20% | 9 h 30 min |
| December 13 | 48°F | 30°F | 33% | 20% | 9 h 30 min |
| December 14 | 48°F | 30°F | 33% | 21% | 9 h 30 min |
| December 15 | 48°F | 30°F | 33% | 21% | 9 h 30 min |
| December 16 | 47°F | 30°F | 34% | 21% | 9 h 30 min |
| December 17 | 47°F | 29°F | 34% | 20% | 9 h 30 min |
| December 18 | 47°F | 29°F | 33% | 20% | 9 h 30 min |
| December 19 | 47°F | 29°F | 33% | 20% | 9 h 20 min |
| December 20 | 46°F | 29°F | 33% | 20% | 9 h 20 min |
| December 21 | 46°F | 29°F | 33% | 20% | 9 h 20 min |
| December 22 | 46°F | 28°F | 33% | 20% | 9 h 20 min |
| December 23 | 46°F | 28°F | 33% | 20% | 9 h 20 min |
| December 24 | 45°F | 28°F | 33% | 20% | 9 h 20 min |
| December 25 | 45°F | 28°F | 33% | 20% | 9 h 20 min |
| December 26 | 45°F | 28°F | 33% | 20% | 9 h 30 min |
| December 27 | 45°F | 28°F | 33% | 20% | 9 h 30 min |
| December 28 | 45°F | 27°F | 33% | 20% | 9 h 30 min |
| December 29 | 45°F | 27°F | 33% | 20% | 9 h 30 min |
| December 30 | 44°F | 27°F | 33% | 20% | 9 h 30 min |
| December 31 | 44°F | 27°F | 33% | 20% | 9 h 30 min |
- Normal high
- 48°FDecember average
- Normal low
- 30°FDecember average
- Precipitation
- 3.71 inmonth total
- Days with precipitation
- 100.01 inch or more
- Snowfall
- 2.5 inmonth total
- Nights at 32°F or colder
- 21
- Daylight
- 9 h 40 min to 9 h 30 minDecember 1 to December 31
- Days at 70°F or more
- 1
- Sunshine
- 67%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093721; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Baltimore in December?
On a given December day the chance of 0.01 inch or more is 33% on average, highest around December 16 (34%). In all, 3.71 in falls on 10 days of a normal December, 1 of them with an inch or more.
In a normal December in Baltimore, 21 nights fall to freezing, 2 days stay below freezing all day and snowfall averages 2.5 inches.
Snow falls on 2 days in a normal December, and an inch or more covers the ground on 2 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093721.
How humid and windy is Baltimore in December?
At 3 p.m. the normal temperature is 43°F with 52% relative humidity and a dew point of 26°F; at 6 a.m. it is 33°F with 75% humidity. The wind averages 7.3 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 33°F | 25°F | 75% | 6.0 mph | 37% |
| 9 a.m. | 35°F | 26°F | 70% | 7.1 mph | 27% |
| noon | 41°F | 26°F | 55% | 10.3 mph | 21% |
| 3 p.m. | 43°F | 26°F | 52% | 9.9 mph | 24% |
| 6 p.m. | 38°F | 26°F | 60% | 6.7 mph | 36% |
| 9 p.m. | 36°F | 26°F | 67% | 6.3 mph | 39% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093721. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for December in Baltimore?
The warmest December temperature on Baltimore's official record (since 1872) is 77°F, on December 29, 1984; the coldest is −3°F, on December 30, 1880. The wettest December brought 8.06 in (2009); the snowiest, 20.4 inches (1966).
The December mean against the 1991-2020 normal of 38.6°F: 2021 45.5°F (+6.9), 2022 37.5°F (−1.1), 2023 43.7°F (+5.1), 2024 38.6°F (at normal), 2025 34.2°F (−4.4). 2 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 45.5°F | +6.9°F | 0.82 in |
| 2022 | 37.5°F | −1.1°F | 4.80 in |
| 2023 | 43.7°F | +5.1°F | 7.29 in |
| 2024 | 38.6°F | at normal | 2.84 in |
| 2025 | 34.2°F | −4.4°F | 1.46 in |
Source: records: ACIS, NWS threaded record BWIthr; recent months: ACIS, station USW00093721. Records and recent months use complete months only.
How does December in Baltimore compare across Maryland?
Across the 26 places PlainClimate covers in Maryland, December normal highs run from 38°F in Frostburg to 52°F in Snow Hill; Baltimore's is 48°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.