Baltimore, Maryland climate: Normal weather by month, frost dates and records

What is the weather like in Baltimore each month?

July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 25°F. The most precipitation falls in July (4.48 in), the least in February (2.90 in).

Each month has its own page with the day-by-day normals, the month's records and its recent years:

• Jan
• Feb
• Mar
• Apr
• May
• Jun
• Jul
• Aug
• Sep
• Oct
• Nov
• Dec

When is the best weather to visit Baltimore?

Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, October has the fewest days with rain (9).

That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.

When is the last frost in Baltimore?

In Baltimore, the last spring frost (32°F) comes after April 10 in half of years and after April 25 in one year in ten; the first autumn frost comes before October 31 in half of years and before October 17 in one year in ten.

Last spring frost, half of years after

April 101 year in 10 after April 25; 9 in 10 after March 27

First autumn frost, half of years before

October 311 year in 10 before October 17; 9 in 10 before November 12

NOAA puts the median frost-free season at 204 days, and the season without a hard freeze (28°F) at 228 days.

A hard freeze (28°F) comes after March 28 in half of springs and before November 10 in half of autumns.

The USDA's 2023 Plant Hardiness Zone Map puts Baltimore in zones 7b to 8a across its 23 ZIP code areas (8a in 21224, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Baltimore's NOAA station is in zone 7b: the coldest night of a typical year reaches 7°F (30 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.

Frost dates for every NOAA station in Maryland · Frost dates by ZIP code

What hardiness zone is each Baltimore ZIP code in?

The USDA's 2023 map gives each ZIP code area one zone. Baltimore's 23 ZIP code areas run from zone 7b to 8a: 14 in 7b and 9 in 8a. Each ZIP's frost dates are in the frost tool.

How hot and how cold does it get in Baltimore?

In a normal year in Baltimore, 34 days a year reach 90°F (1 of them 100°F or more), 93 nights fall to 32°F or colder and 121 days bring measurable precipitation.

Days at 90°F or more

34a normal year

Days at 100°F or more

1a normal year

Nights at 32°F or colder

93a normal year

Days that stay below freezing

11high of 32°F or less

Days with 0.01 inch of precipitation

121a normal year

Days with 1 inch of snow or more

5a normal year

The highest temperature in Baltimore's official record (kept by the National Weather Service since 1872) is 107°F, on July 10, 1936; the lowest is −7°F, on January 29, 1963.

The wettest calendar year on that record is 2018, with 71.82 in; the snowiest season is 2009–10, with 77.0 inches.

How humid and windy is Baltimore, and how clear are its skies?

The summer (June-August) dew point averages 65°F. The muggiest month is July, with an average dew point of 66°F, above the 65°F at which most people call the air sticky; the driest air comes in January (22°F). February is the windiest month (8.5 mph on average), and September has the most clear or nearly clear hours (37%).

How sunny is Baltimore?

Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Baltimore, 4.0 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (67%). Among the 459 U.S. places of 50,000 or more, that ranks tied 330th (with 21 others) in sunshine.

How much heating and cooling does Baltimore need?

A normal year in Baltimore brings 4,484 heating degree days, 17% fewer than the median U.S. place (5,373), and 1,322 cooling degree days, 46% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,007 growing degree days a year above 50°F.

Has Baltimore been warmer than normal lately?

2025 averaged 56.7°F, 0.5°F above the 1991-2020 normal of 56.2°F. 5 of the 5 complete years since 2021 ran warmer than the normal.

Over 82 complete years from 1940 to 2025, the station's annual mean temperature rose at a fitted 3.0°F per century (+0.17°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.

Which places near Baltimore share this climate record?

12 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.

• Glen Burnie, MDalso near: Maryland Science Center Baltimore (9 mi, 59.1°F a year); Annapolis Police Barracks (12 mi, 58.8°F a year)72,772 people · 4 mi E
• Severn, MDalso near: Maryland Science Center Baltimore (11 mi, 59.1°F a year); Laurel (11 mi, 57.1°F a year)58,041 people · 2 mi S
• Odenton, MD45,585 people · 7 mi S
• Pasadena, MD32,717 people · 7 mi E
• Ilchester, MD27,552 people · 5 mi NW
• Elkridge, MD26,183 people · 4 mi NW
• Ferndale, MD17,076 people · 3 mi NE
• Riviera Beach, MD12,608 people · 8 mi E
• Linthicum, MD10,545 people · 3 mi N
• Fort Meade, MD10,477 people · 5 mi SW
• Jessup, MD9,147 people · 5 mi W
• Gambrills, MD2,862 people · 5 mi S

Nearby and next

• Baltimore in OctoberThis month day by day, its records and recent years
• Maryland climateThe statewide normals and every place in the state
• Maryland Science Center Baltimore, MD9 miles from this station, 59.1°F a year
• Laurel, MD13 miles from this station, 57.1°F a year
• Cylburn, MD13 miles from this station, 56.1°F a year
• Glenn Dale, MD15 miles from this station, 54.9°F a year
• Compare two placesMonth by month, side by side

Download these normals (CSV) · JSON · How these figures are made