Climate averages 1991–2020

Baltimore weather
in January.

A cold, wet month: the coolest and the joint 3rd driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 4.8°C Daytime mean, January

Average low -2.9°C Night-time mean, January

Rainfall 90 mm 9 days with ≥1 mm

Daylight 10 h Sunrise to sunset, per day

January is a cold month in Baltimore: daytime highs average 4.8°C and nights cool to about -2.9°C. By daytime temperature it is the coolest month of the year.

Expect about 90 mm of rain on roughly 9 days, which makes January a wet month (the joint 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 44 min on an average January day.

The nearest other city in this atlas is Columbia (Maryland), United States (20 km away). In January its highs average 4.6°C, about as warm as Baltimore, with 80 mm of rain.

Among the 498 cities listed in the United States, Baltimore ranks joint 320th of 498 for the warmest January highs and joint 352nd of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Baltimore is 4.7°C cooler than that mean.

From January to February, average highs rise by 1.6°C to 6.4°C, and monthly rainfall falls from 90 mm to 84 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Baltimore climate table

1991–2020

Monthly climate averages for Baltimore, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	4.8°C-2.9°C	-2.9°C	90	9.0	9.710 h
February	6.4°C-2.5°C	-2.5°C	84	9.2	10.711 h
March	10.9°C1.3°C	1.3°C	114	10.5	11.912 h
April	17.2°C7.0°C	7.0°C	97	10.4	13.213 h
May	22.2°C12.7°C	12.7°C	96	11.0	14.314 h
June	27.0°C18.0°C	18.0°C	90	10.9	14.915 h
July	29.6°C21.0°C	21.0°C	97	11.4	14.615 h
August	28.6°C20.2°C	20.2°C	93	10.4	13.714 h
September	24.8°C16.6°C	16.6°C	120	9.4	12.512 h
October	18.6°C10.2°C	10.2°C	102	8.4	11.211 h
November	12.3°C4.2°C	4.2°C	86	8.3	10.110 h
December	7.1°C-0.4°C	-0.4°C	109	9.6	9.59 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

January in nearby cities

Distance from Baltimore

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Baltimore) is explained once on the Baltimore year overview and on the Sources, method and limits page.