Baltimore County (Towson)
September
Weather in Baltimore County, Maryland for September 2026
Your guide to Baltimore County weather in September - trends and predictions
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So far, September 2026 in Baltimore County shows a warmer trend than usual by 3.9 °F.
Expect cooler weather in the next days in Baltimore County with the forecast suggesting a temperature of 25.5 °F, lower than the historical average.
In general, the average temperature in Baltimore County at the beginning of September is 27.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23 °F by the end of September.
Baltimore County in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 230.1 mm.
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Temperatures
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14
Dry days
16
Rainy days
0
Snow days
24°/17°
Temperatures
15 km/h
Avg max wind
71 %
Avg humidity
Baltimore County Weather September
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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
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 30° /20° | 0.2 mm | 7 | |
| Sept. 2 |  Overcast | 26° /18° | 6.1 mm | 5 | |
| Sept. 3 |  Sunny | 27° /16° | 23.2 mm | 5 | |
| Sept. 4 | Overcast | 30° /17° | 9.9 mm | 5 | |
| Sept. 5 | Sunny | 29° /17° | 6.6 mm | 7 | |
| Sept. 6 | Overcast | 28° /17° | 33.3 mm | 7 | |
| Sept. 7 |  Moderate rain at times | 24° /14° | 10.4 mm | 6 | |
| Sept. 8 | Sunny | 26° /12° | 0 mm | 6 | |
| Sept. 9 | Sunny | 27° /14° | 0 mm | 6 | |
| Sept. 10 | Patchy rain possible | 33° /23° | 0.2 mm | 5.4 | |
| Sept. 11 | Overcast | 28° /19° | 1.1 mm | 5.6 | |
| Sept. 12 | Overcast | 25° /16° | 0 mm | 5.5 | |
| Sept. 13 | Patchy rain possible | 27° /19° | 1.3 mm | 6.9 | |
| Sept. 14 | Overcast | 28° /22° | 0.2 mm | 6 | |
| Sept. 15 | Overcast | 27° /20° | 0 mm | 7 | |
| Sept. 16 | Sunny | 31° /21° | 0 mm | 8 | |
| Sept. 17 | Sunny | 30° /16° | 3.4 mm | 7 | |
| Sept. 18 | Light rain shower | 24° /14° | 4.7 mm | 6 | |
| Sept. 19 | Sunny | 17° /9° | 0 mm | 5 | |
| Sept. 20 | Sunny | 19° /11° | 0 mm | 5 | |
| Sept. 21 | Sunny | 21° /10° | 0 mm | 6 | |
| Sept. 22 | Sunny | 23° /14° | 0 mm | 6 | |
| Sept. 23 | Overcast | 24° /16° | 0 mm | 5 | |
| Sept. 24 | Moderate or heavy rain shower | 23° /17° | 7.3 mm | 5 | |
| Sept. 25 |  Heavy rain at times | 24° /17° | 25.9 mm | 6 | |
| Sept. 26 | Heavy rain at times | 25° /20° | 1.9 mm | 6 | |
| Sept. 27 | Moderate or heavy rain shower | 24° /18° | 13.9 mm | 5 | |
| Sept. 28 | Heavy rain at times | 21° /17° | 13.4 mm | 5 | |
| Sept. 29 | Moderate or heavy rain shower | 23° /17° | 5.8 mm | 6 | |
| Sept. 30 |  Mist | 21° /17° | 0 mm | 5 | |
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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 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Baltimore County during September?
Significant rainfall exceeding 230.1 mm is expected in Baltimore County during September, occurring over more than 16 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 15 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 💧
Typically, Baltimore County has 16 rainy days in September with a total of 230.1 mm of rainfall.
UV exposure in Baltimore County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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