Frederick County (Frederick)
September
Weather in Frederick County, Maryland for September 2027
Your guide to Frederick County weather in September - trends and predictions
In general, the average temperature in Frederick County at the beginning of September is 27.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.9 °C by the end of September.
Frederick County experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 147.8 mm.
Is September a good time to visit Frederick County? check out the best time to travel to Frederick County page.
✨ Is September a good time to visit Frederick County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
20
Dry days
10
Rainy days
0
Snow days
25°/15°
Temperatures
16 km/h
Avg max wind
75 %
Avg humidity
Frederick County Weather September
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Temperatures trend during September in Frederick County
See the weather trend as well as the moving average line
September weather in Frederick County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 29° /17° | 1.2 mm | 7 | |
| Sept. 2 |  Light rain | 27° /16° | 6.9 mm | 5 | |
| Sept. 3 |  Sunny | 28° /14° | 0 mm | 6 | |
| Sept. 4 |  Heavy rain | 29° /16° | 25.9 mm | 4 | |
| Sept. 5 | Light rain | 28° /16° | 2.9 mm | 6 | |
| Sept. 6 | Light rain | 28° /15° | 2.5 mm | 7 | |
| Sept. 7 | Patchy light drizzle | 24° /13° | 0.2 mm | 6 | |
| Sept. 8 | Sunny | 24° /9° | 0 mm | 6 | |
| Sept. 9 | Sunny | 27° /11° | 0 mm | 6 | |
| Sept. 10 | Sunny | 27° /13° | 0.5 mm | 5 | |
| Sept. 11 | Patchy rain possible | 27° /15° | 2.3 mm | 5 | |
| Sept. 12 | Sunny | 26° /15° | 0.1 mm | 6 | |
| Sept. 13 | Patchy rain possible | 28° /16° | 1.4 mm | 5 | |
| Sept. 14 |  Mist | 27° /16° | 0 mm | 6 | |
| Sept. 15 | Patchy rain possible | 27° /13° | 1.9 mm | 7 | |
| Sept. 16 | Patchy rain possible | 25° /13° | 1.4 mm | 6 | |
| Sept. 17 |  Overcast | 22° /16° | 0.6 mm | 4 | |
| Sept. 18 | Fog | 25° /18° | 0.9 mm | 5 | |
| Sept. 19 | Overcast | 26° /14° | 0.7 mm | 6 | |
| Sept. 20 | Light rain | 23° /16° | 3.5 mm | 4 | |
| Sept. 21 |  Moderate rain | 21° /16° | 11.5 mm | 4 | |
| Sept. 22 | Moderate rain | 20° /13° | 12.7 mm | 4 | |
| Sept. 23 | Patchy rain possible | 23° /15° | 1.1 mm | 4 | |
| Sept. 24 | Heavy rain | 20° /14° | 28.4 mm | 4 | |
| Sept. 25 | Moderate rain | 23° /14° | 16.8 mm | 5 | |
| Sept. 26 | Patchy rain possible | 24° /17° | 2 mm | 6 | |
| Sept. 27 | Moderate rain | 21° /16° | 14 mm | 4 | |
| Sept. 28 | Light rain | 21° /16° | 8.2 mm | 3 | |
| Sept. 29 | Fog | 23° /16° | 0.3 mm | 4 | |
| Sept. 30 | Overcast | 22° /15° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Frederick 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 Frederick County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Frederick County in September - FAQ
What are the expected maximum and minimum temperatures in Frederick County during September?
During September, expect a variety of temperatures with highs around 25° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Frederick County during September?
Significant rainfall exceeding 147.8 mm is expected in Frederick County during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Frederick County during September?
The average wind speed in Frederick County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Frederick County
Explore the daily rainfall trends and prepare for Frederick Countys September weather 💧
Typically, Frederick County has 10 rainy days in September with a total of 147.8 mm of rainfall.
UV exposure in Frederick County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Frederick County
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