Montgomery County (Silver Spring)
September
Weather in Montgomery County, Maryland for September 2026
Your guide to Montgomery County weather in September - trends and predictions
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So far, September 2026 in Montgomery County shows a warmer trend than usual by 3 °F.
Expect cooler weather in the next days in Montgomery County with the forecast suggesting a temperature of 27.4 °F, lower than the historical average.
In general, the average temperature in Montgomery County at the beginning of September is 30.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.7 °F by the end of September.
The climate of Montgomery County in September is notably wet, with an average of 12 rainy days, and a total of 290.4 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
12
Rainy days
0
Snow days
26°/18°
Temperatures
13 km/h
Avg max wind
66 %
Avg humidity
Montgomery County Weather September
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Temperatures trend during September in Montgomery County
See the weather trend as well as the moving average line
September weather in Montgomery County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Cloudy | 32° /19° | 0 mm | 8 | |
| Sept. 2 |  Overcast | 30° /20° | 36.6 mm | 7 | |
| Sept. 3 | Cloudy | 31° /19° | 8.4 mm | 7 | |
| Sept. 4 |  Partly cloudy | 33° /20° | 6.9 mm | 8 | |
| Sept. 5 |  Mist | 31° /21° | 3.4 mm | 7 | |
| Sept. 6 |  Thundery outbreaks possible | 31° /19° | 37.7 mm | 8 | |
| Sept. 7 |  Light rain shower | 26° /16° | 6.3 mm | 7 | |
| Sept. 8 |  Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 9 | Partly cloudy | 25° /15° | 0 mm | 7 | |
| Sept. 10 | Light rain shower | 30° /22° | 3.8 mm | 7.2 | |
| Sept. 11 | Overcast | 28° /20° | 7.7 mm | 6.2 | |
| Sept. 12 | Light rain shower | 25° /21° | 14.6 mm | 5.3 | |
| Sept. 13 | Overcast | 30° /21° | 0.5 mm | 7 | |
| Sept. 14 | Cloudy | 32° /23° | 0 mm | 8 | |
| Sept. 15 | Sunny | 32° /22° | 0 mm | 8 | |
| Sept. 16 | Sunny | 34° /22° | 2.3 mm | 8 | |
| Sept. 17 | Light rain shower | 24° /18° | 5.8 mm | 5 | |
| Sept. 18 | Sunny | 32° /21° | 3.8 mm | 8 | |
| Sept. 19 | Sunny | 23° /16° | 1.9 mm | 6 | |
| Sept. 20 | Sunny | 22° /13° | 0 mm | 6 | |
| Sept. 21 | Sunny | 23° /15° | 0 mm | 6 | |
| Sept. 22 | Sunny | 25° /17° | 0 mm | 7 | |
| Sept. 23 | Overcast | 24° /17° | 0 mm | 5 | |
| Sept. 24 | Cloudy | 28° /20° | 0 mm | 6 | |
| Sept. 25 |  Moderate or heavy rain shower | 27° /20° | 23.3 mm | 6 | |
| Sept. 26 | Overcast | 24° /21° | 14.9 mm | 5 | |
| Sept. 27 | Overcast | 24° /18° | 0 mm | 5 | |
| Sept. 28 | Mist | 19° /18° | 6.9 mm | 4 | |
| Sept. 29 | Fog | 26° /17° | 0 mm | 6 | |
| Sept. 30 | Overcast | 25° /19° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Montgomery 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 Montgomery County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Montgomery County in September - FAQ
What are the expected maximum and minimum temperatures in Montgomery County during September?
During September, expect a variety of temperatures with highs around 26° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Montgomery County during September?
Significant rainfall exceeding 290.4 mm is expected in Montgomery County during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Montgomery County during September?
The average wind speed in Montgomery County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Montgomery County
Explore the daily rainfall trends and prepare for Montgomery Countys September weather 💧
Typically, Montgomery County has 12 rainy days in September with a total of 290.4 mm of rainfall.
UV exposure in Montgomery County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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