Is Baltimore hot in September?
Days are typically warm at 27°C, while nights average 18.6°C.
United States · 1991–2020 normal
Baltimore in
September.
Typical September weather in Baltimore: 27°C by day, 18.6°C at night, 118 mm of rain over 6.2 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high27°C
Typical low18.6°C
Rain118 mm
Wet days6.2
In the year-round weather comparison, September scores 69 out of 100 (May leads the year at 86). Daylight is calculated as 12 h 24 from latitude 39.29°. Open-water sea temperature is 23.3°C (28 km from the place centre).
September at a glance
What is Baltimore like in September?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 118 mm across about 6 wet days.
How much daylight is there?
There are about 12 h 24 between sunrise and sunset at mid-month, calculated from the place latitude.
Is September a good time to visit?
September ranks 3 of 12 in our weather comparison; May ranks first.
Event window
Warm sea in September
The nearest open-water NOAA OISST 1991–2020 cell averages 23.3°C in September. A sheltered bay can run warmer than that open-water cell.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4347778
- NOAA station
- USW00093784 · MARYLAND SCI CTR
- Station distance
- 1 km from the place centre
- Coverage
- Good coverage · 21 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Baltimore is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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