Frederick
September
Weather in Frederick for September 2025
Your guide to Frederick weather in September - trends and predictions
In general, the average temperature in Frederick at the beginning of September is 23.9 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 21.6 °F by the end of September.
Frederick experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 188.5 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
21
Dry days
9
Rainy days
0
Snow days
24°/14°
Temperatures
16 km/h
Avg max wind
76 %
Avg humidity
Frederick in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  24° | 3  23° | 4 24° | 5  25° | 6 25° | 7  20° |
| 8 22° | 9 25° | 10 29° | 11 29° | 12 27° | 13 27° | 14 29° |
| 15 28° | 16 24° | 17 19° | 18 21° | 19 24° | 20  25° | 21  23° |
| 22 19° | 23 22° | 24  17° | 25 22° | 26 26° | 27 23° | 28 24° |
| 29 21° | 30 18° |
You can click on date
Access Frederick weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Frederick
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Light rain shower | 26° /19° | 3.6 mm | 6 | |
| Sept. 2 | Overcast | 24° /14° | 0 mm | 5 | |
| Sept. 3 | Sunny | 23° /8° | 0 mm | 6 | |
| Sept. 4 | Overcast | 24° /10° | 0 mm | 5 | |
| Sept. 5 | Mist | 25° /10° | 0 mm | 6 | |
| Sept. 6 | Patchy rain possible | 25° /12° | 2.1 mm | 6 | |
| Sept. 7 | Patchy light drizzle | 20° /11° | 0.5 mm | 5 | |
| Sept. 8 | Sunny | 22° /6° | 0 mm | 6 | |
| Sept. 9 | Sunny | 25° /8° | 0 mm | 7 | |
| Sept. 10 | Sunny | 29° /11° | 0 mm | 7 | |
| Sept. 11 | Sunny | 29° /12° | 0 mm | 7 | |
| Sept. 12 | Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 13 | Mist | 27° /14° | 0 mm | 6 | |
| Sept. 14 | Mist | 29° /15° | 0 mm | 6 | |
| Sept. 15 | Sunny | 28° /12° | 0 mm | 7 | |
| Sept. 16 | Overcast | 24° /11° | 4.3 mm | 5 | |
| Sept. 17 | Overcast | 19° /16° | 0 mm | 4 | |
| Sept. 18 | Fog | 21° /17° | 0 mm | 5 | |
| Sept. 19 | Overcast | 24° /15° | 0 mm | 5 | |
| Sept. 20 | Partly cloudy | 25° /15° | 0 mm | 7 | |
| Sept. 21 | Moderate or heavy rain shower | 23° /18° | 22.1 mm | 5 | |
| Sept. 22 | Light rain shower | 19° /17° | 16.4 mm | 4 | |
| Sept. 23 | Overcast | 22° /16° | 0 mm | 5 | |
| Sept. 24 | Moderate rain | 17° /16° | 85.1 mm | 4 | |
| Sept. 25 | Light rain shower | 22° /17° | 13.6 mm | 5 | |
| Sept. 26 | Fog | 26° /21° | 0 mm | 6 | |
| Sept. 27 | Moderate or heavy rain shower | 23° /19° | 38.7 mm | 5 | |
| Sept. 28 | Overcast | 24° /20° | 2 mm | 5 | |
| Sept. 29 | Fog | 21° /18° | 0 mm | 5 | |
| Sept. 30 | Overcast | 18° /15° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Frederick 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 forecast closer to your planned date for the most up-to-date weather information.
Frederick in September - FAQ
What are the expected maximum and minimum temperatures in Frederick during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Frederick during September?
Significant rainfall exceeding 188.5 mm is expected in Frederick during September, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Frederick during September?
The average wind speed in Frederick during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Frederick
Explore the daily rainfall trends and prepare for Fredericks September weather 💧
UV exposure in Frederick during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
You are here
Where is Frederick?Get accurate weather forecasts for Frederick, located at latitude 39.414 and longitude -77.411. Stay updated with localized weather information tailored for Frederick.
Found a mistake?
We appreciate your attention to details. Tell us here.