Baltimore, Maryland Weather
Day 93 of summer. Read today’s microseason across nine climate regions →
Baltimore weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 10:19 AM EDT · Open-Meteo
- TodaySep 21Drizzle later20%0.03″75°65°—
- TuesdaySep 22Heavy Rain60%0.75″65°59°-10°
- WednesdaySep 23Drizzle63%0.12″65°52°0°
- ThursdaySep 24Overcast18%—68°54°+3°
- FridaySep 25Clear21%—71°53°+3°
- SaturdaySep 26Clear21%—74°55°+3°
- SundaySep 27Partly Cloudy——77°57°+3°
Air quality now AQI 45 · Good
AQI 45 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:36 PM
- Moonset
- 1:27 AM
- In sign
- ♑︎ Capricorn
Baltimore at a glance
- Today vs. normal: Today averages 70°F (high 75°F, low 65°F), 2°F above the 68°F normal for Sep 21
- Last frost: March 24 (1991–2020 median, NOAA station 3 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant beans, squash, fall brassicas, carrots; harvest tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — Baltimore
- Mon75°65°20%
- Tue65°59°60%
- Wed65°52°63%
- Thu68°54°18%
- Fri71°53°21%
- Sat74°55°21%
- Sun77°57°9%
- Mon79°62°7%
- Tue80°64°9%
- Wed81°65°21%
- Thu83°66°16%
- Fri79°63°18%
- Sat79°63°19%
- Sun77°66°22%
- Mon72°57°26%
- Tue64°50°16%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Baltimore
Interactive wind and temperature map centered on Baltimore — it loads in your browser. Open the full weather map.
Right now in the garden
Late season
As of September 21, the first frost (around November 21) is about 9 weeks away. Frost-tender plants keep producing until then. This city's planting calendar for September: plant beans, squash, fall brassicas, and carrots; harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Baltimore
Baltimore sits in Baltimore County, where the year’s longest day runs 14h 56m of daylight and its shortest just 9h 24m — a swing of +5h 33m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Baltimore is the state’s largest city. The nearest town Baltimore tracks is Galena, roughly 39 miles to the E.
Air quality in Baltimore
Air quality in Baltimore’s county has held roughly steady since 2020; its cleanest year on record was 2020 (median AQI 38). See the full air-quality history for Baltimore.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| March | lettuce, peas, spinach, radishes | radishes |
| April | lettuce, peas, spinach, radishes | lettuce, spinach, radishes |
| May | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, garlic |
| July | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash |
| August | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| September | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| November | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| December | — | fall brassicas, carrots |
A year in weather
Baltimore peaks at about 78°F in July and bottoms near 32°F in January; December brings the heaviest rain (4.5 inches) and October the least (3.1 inches).
| Month | Mean temp | Precip |
|---|---|---|
| January | 32° | 3.8″ |
| February | 35° | 3.2″ |
| March | 43° | 3.8″ |
| April | 54° | 4.0″ |
| May | 62° | 3.8″ |
| June | 72° | 4.0″ |
| July | 78° | 3.2″ |
| August | 76° | 4.4″ |
| September | 70° | 3.9″ |
| October | 59° | 3.1″ |
| November | 46° | 4.0″ |
| December | 37° | 4.5″ |
Regional context
Similar climates Baltimore Highlands, MD, Lansdowne, MD, Rosedale, MD
Baltimore's climate, from modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo), pairs 32°F Januarys with 78°F Julys — a 46°F swing. About 45.6 inches of precipitation falls each year.
No season owns Baltimore's rain: December reaches 4.5 inches and October keeps 3.1 inches, an even spread through Baltimore's year. That lines Baltimore up with places like Baltimore Highlands, MD, Lansdowne, MD and Rosedale, MD, fed by overlapping storm tracks.
Baltimore's growing window opens around March 24, once Baltimore's overnight lows stop freezing — sow peas, lettuce, spinach, and radishes. Warm-soil crops in Baltimore wait about two weeks past Baltimore's last frost, once the soil warms. Baltimore's window closes around November 21 as Baltimore's overnight lows return below freezing. Sheltered Baltimore yards can escape a light frost.
Similar climates: Baltimore Highlands, MD, Lansdowne, MD, Rosedale, MD, Arbutus, MD, Brooklyn Park, MD.
Frequently asked
- When does it freeze in Baltimore?
- Frost typically leaves Baltimore by March 24 and returns to Baltimore near November 21.
- What is the rainy season in Baltimore?
- Rainfall in Baltimore peaks in December near 4.5 inches, out of about 46 inches annually.
- What is the warmest month in Baltimore?
- July is Baltimore's warmest month, averaging about 78°F.
- What is the coldest month in Baltimore?
- Baltimore bottoms out in January, with a mean near 32°F.
- When can I start a vegetable garden in Baltimore?
- Time tomatoes in Baltimore for two weeks after March 24; peas and greens start at Baltimore's frost line.
- What hardiness zone is Baltimore?
- Baltimore's USDA zone comes from its January mean (32°F); enter the ZIP on the USDA lookup for the number.
- What is the 10-day forecast for Baltimore?
- Baltimore's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Baltimore?
- See this week's day-by-day rain chances for Baltimore in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Baltimore?
- Current conditions for Baltimore and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Baltimore forecast updated?
- The Baltimore forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Baltimore?
- Today's sunrise and sunset times for Baltimore are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Baltimore?
- The next few days in Baltimore's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Baltimore sits at 39.3°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in Baltimore
- 21201
- 21202
- 21203
- 21205
- 21206
- 21207
- 21209
- 21210
- 21211
- 21212
- 21213
- 21214
- 21215
- 21216
- 21217
- 21218
- 21223
- 21224
- 21225
- 21226
- 21229
- 21230
- 21231
- 21233
- 21239
- 21240
- 21250
- 21251
- 21263
- 21264
- 21270
- 21273
- 21275
- 21278
- 21279
- 21281
- 21287
- 21290
- 21297
- 21298