Baltimore County (Towson)
September
Weather in Baltimore County, Maryland for September 2025
Your guide to Baltimore County weather in September - trends and predictions
In general, the average temperature in Baltimore County at the beginning of September is 24.1 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 21.3 °F by the end of September.
The climate of Baltimore County in September is notably wet, with an average of 15 rainy days, and a total of 211.1 mm of precipitation.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
15
Dry days
15
Rainy days
0
Snow days
24°/16°
Temperatures
16 km/h
Avg max wind
73 %
Avg humidity
Baltimore County Weather September
Move between months or click on a day
Temperatures trend during September in Baltimore County
See the weather trend as well as the moving average line
September weather in Baltimore County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 28° /21° | 0.6 mm | 6 | |
| Sept. 2 |  Overcast | 24° /17° | 0 mm | 5 | |
| Sept. 3 |  Sunny | 23° /12° | 0 mm | 6 | |
| Sept. 4 | Overcast | 24° /13° | 0 mm | 5 | |
| Sept. 5 | Sunny | 25° /13° | 0 mm | 7 | |
| Sept. 6 | Overcast | 23° /15° | 0 mm | 5 | |
| Sept. 7 |  Moderate rain at times | 22° /14° | 1.4 mm | 5 | |
| Sept. 8 | Sunny | 21° /10° | 0 mm | 6 | |
| Sept. 9 | Sunny | 25° /11° | 0 mm | 7 | |
| Sept. 10 | Sunny | 28° /15° | 0 mm | 7 | |
| Sept. 11 | Sunny | 28° /15° | 0 mm | 7 | |
| Sept. 12 | Sunny | 26° /15° | 0 mm | 7 | |
| Sept. 13 | Patchy rain possible | 26° /16° | 0.4 mm | 6 | |
| Sept. 14 |  Partly cloudy | 28° /16° | 0 mm | 7 | |
| Sept. 15 | Sunny | 27° /15° | 0 mm | 7 | |
| Sept. 16 | Overcast | 24° /14° | 0 mm | 5 | |
| Sept. 17 | Patchy rain possible | 23° /18° | 1.3 mm | 5 | |
| Sept. 18 | Moderate or heavy rain shower | 22° /18° | 43.6 mm | 5 | |
| Sept. 19 | Moderate or heavy rain shower | 24° /16° | 29.8 mm | 5 | |
| Sept. 20 |  Cloudy | 24° /17° | 0 mm | 5 | |
| Sept. 21 | Moderate or heavy rain shower | 24° /18° | 39 mm | 5 | |
| Sept. 22 | Moderate or heavy rain shower | 21° /17° | 6.3 mm | 5 | |
| Sept. 23 | Moderate rain at times | 20° /16° | 8.6 mm | 5 | |
| Sept. 24 | Moderate or heavy rain shower | 19° /16° | 14.7 mm | 4 | |
| Sept. 25 |  Heavy rain at times | 21° /17° | 7.5 mm | 5 | |
| Sept. 26 | Heavy rain at times | 25° /20° | 3.7 mm | 6 | |
| Sept. 27 | Moderate or heavy rain shower | 23° /20° | 27.8 mm | 5 | |
| Sept. 28 | Heavy rain at times | 23° /19° | 14.8 mm | 5 | |
| Sept. 29 | Moderate or heavy rain shower | 20° /17° | 11.6 mm | 5 | |
| Sept. 30 |  Mist | 18° /16° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Baltimore County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Baltimore County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Baltimore County in September - FAQ
What are the expected maximum and minimum temperatures in Baltimore County during September?
During September, expect a variety of temperatures with highs around 24° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Baltimore County during September?
Significant rainfall exceeding 211.1 mm is expected in Baltimore County during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Baltimore County during September?
The average wind speed in Baltimore County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Baltimore County
Explore the daily rainfall trends and prepare for Baltimore Countys September weather 💧
UV exposure in Baltimore County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Baltimore County
Select a location for an accurate weather forecast
More Locations Quick links
More Baltimore County weather pages
You are here
Where is Baltimore County?Get accurate weather forecasts for Baltimore County, located at latitude 39.402 and longitude -76.602. Stay updated with localized weather information tailored for Baltimore County.
Found a mistake?
We appreciate your attention to details. Tell us here.