Baltimore weather in September
Baltimore in September averages 21°C (69°F) and 113 mm of rain.
Of the twelve months in Baltimore, September is the fourth warmest and the wettest.
- Average temp
- 21°C (69°F)
15–26°C · 59–79°F
- Rainfall
- 113 mm
Showers likely
- Sunshine
- —
- Wind
- 10 km/h
What is Baltimore like in September?
Daytime
Days are warm, typically in the mid-20s°C or above.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Baltimore in September?
A light rain jacket
About 113 mm falls this month — showers rather than washouts.
A layer for the evening
The day swings about 11°C between its low and its high.
September compared with August and October
September in Baltimore is 3.8°C cooler than August and about as wet as it, which averages 24°C (76°F).
September in Baltimore is 6.6°C warmer than October and 13 mm wetter than it, which averages 14°C (57°F).
Daylight in Baltimore in September
On 15 September the sun is up for 12 hours 26 minutes in Baltimore, rising about 06:48 and setting about 19:13 local time.
September ends 1 hour 13 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 2 hours 30 minutes short of June, the longest-lit month here.
Where to stay in Baltimore
Dates are a starting point for September.
Travel guides for Baltimore
What to read before you book.
Baltimore weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 1°C / 34°F | 78 mm |
| February | 3°C / 37°F | 74 mm |
| March | 7°C / 44°F | 102 mm |
| April | 13°C / 55°F | 87 mm |
| May | 18°C / 64°F | 97 mm |
| June | 23°C / 73°F | 101 mm |
| July | 26°C / 78°F | 111 mm |
| August | 24°C / 76°F | 104 mm |
| September | 21°C / 69°F | 113 mm |
| October | 14°C / 57°F | 100 mm |
| November | 8°C / 47°F | 80 mm |
| December | 4°C / 38°F | 95 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about Baltimore in September
September climate averages for Baltimore, 1991–2020.
Baltimore averages 21°C (69°F) in September, ranging from about 15°C (59°F) at night to 26°C (79°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 113 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
Yes. September averages 21°C (69°F) against 14°C (57°F) in October — 6.6°C warmer.
September is 3.8°C cooler than August, and about as wet.
Yes. September falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 26 minutes of daylight in mid-September, against 14 hours 56 minutes in June and 9 hours 25 minutes in December.
On 15 September, sunrise is about 06:48 and sunset about 19:13 local time. Both shift across the month — the month ends 1 hour 13 minutes shorter than it starts.
