Early autumn · Weather & things to do
Baltimore in September
Baltimore cools off: highs slip to 80°F (27°C), from 87°F in August, with lows of 60°F (16°C) and about 4.4 in (113 mm) of rain.
September opens the best stretch on our comfort score, at 83/100 (3rd of 12).
- Avg high
- 80°F (27°C)
- Avg low
- 60°F (16°C)
- Rain
- 4.4 in (113 mm)
- Humidity
- 72%
- Cloud cover
- 51%
- Daylight
- ~12 h 15 min
- Comfort score
- 83/100 · Great
What September feels like
Days are warm, averaging 80°F (27°C), easy weather for being outside from morning to evening.
Nights cool to an average low of 60°F (16°C).
Some rain is likely, about 4.4 in (113 mm) in the month, so pack for a shower or two.
Plan around September
September is one of Baltimore's best months on the climate data.
- Last warm month for a while: October highs fall to 67°F.
- Opens the best-scoring stretch on our comfort score: April & May and September & October.
- Comfort improves from 71/100 in August to 83/100.
- Our Capital Cities Corridor route recommends Mar – Jun, so September falls outside its suggested window.
What to pack for September
- Light, breathable clotheshighs average 80°F
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost picks involve some walking
What to do in Baltimore in September
September is good outdoor weather here, so these picks lean toward the open air.
Federal Hill Park
Hilltop park with the best view over the Inner Harbor skyline.
Why now September scores 83/100 for comfort, good conditions for being outside.
B&O Railroad Museum
Historic roundhouse holding one of the largest collections of 19th-century locomotives.
The Walters Art Museum
Free museum with armor, ancient art and illuminated manuscripts in Mount Vernon.
Thames Street Oyster House
Fells Point seafood house known for lobster rolls and raw bar.
Why now Highs near 80°F and 4.4 in of monthly rain make this an easy outdoor pick.
Faidley Seafood
Lexington Market stall since 1886, known for its lump crab cake.
Nearby in September
- Washington, DC in September~35 mi · highs 80°F, 4.2 in rain · similar daytime temperatures, about as wet
- Lancaster in September~54 mi · highs 79°F, 4.6 in rain · similar daytime temperatures, about as wet
- Kennett Square in September~61 mi · highs 79°F, 4.4 in rain · similar daytime temperatures, about as wet
- Philadelphia in September~90 mi · highs 79°F, 4.0 in rain · similar daytime temperatures, about as wet
These averages also cover Fells Point and Inner Harbor & Harbor East.
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Baltimore in September: quick answers
Is September a good time to visit Baltimore?
Yes. On the climate data it's one of the best months, scoring 83/100. Expect highs of 80°F (27°C) and 4.4 in (113 mm) of rain. Our Capital Cities Corridor route recommends Mar – Jun, so September is outside its suggested window.
How hot is Baltimore in September?
Average highs are 80°F (27°C) and average lows 60°F (16°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Baltimore in September?
Some: about 4.4 in (113 mm) of rain falls across September on average, the 3rd-wettest month of the year. The annual total is about 45.7 in (1162 mm).
What should I pack for Baltimore in September?
Bring light, breathable clothes (highs average 80°F), packable rain jacket or umbrella (a shower or two is likely) and comfortable walking shoes (most picks involve some walking).
More on Baltimore
Planning Baltimore in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.