Lancaster County
September
Weather in Lancaster County for September 2025
Your guide to Lancaster County weather in September - trends and predictions
In general, the average temperature in Lancaster County at the beginning of September is 34 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 30.7 °F by the end of September.
Lancaster County sees moderate rainfall in September, averaging 8 rainy days.
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22
Dry days
8
Rainy days
0
Snow days
32°/13°
Temperatures
23 km/h
Avg max wind
53 %
Avg humidity
Lancaster County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  36° | 2 36° | 3 36° | 4 36° | 5  34° | 6 30° | 7 30° |
| 8  32° | 9  35° | 10 31° | 11 31° | 12 31° | 13 32° | 14 31° |
| 15 32° | 16  31° | 17 29° | 18 35° | 19  34° | 20 31° | 21 33° |
| 22  26° | 23 27° | 24 27° | 25 30° | 26 29° | 27 28° | 28 33° |
| 29 33° | 30 35° |
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Temperatures trend during September in Lancaster County
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 36° /15° | 0 mm | 9 | |
| Sept. 2 | Sunny | 36° /14° | 0 mm | 9 | |
| Sept. 3 | Sunny | 36° /15° | 0 mm | 9 | |
| Sept. 4 | Sunny | 36° /15° | 0 mm | 9 | |
| Sept. 5 | Partly cloudy | 34° /18° | 0 mm | 9 | |
| Sept. 6 | Sunny | 30° /12° | 0 mm | 8 | |
| Sept. 7 | Sunny | 30° /10° | 0 mm | 8 | |
| Sept. 8 | Patchy rain possible | 32° /13° | 1.9 mm | 8 | |
| Sept. 9 | Overcast | 35° /15° | 0 mm | 9 | |
| Sept. 10 | Patchy rain possible | 31° /17° | 2.3 mm | 8 | |
| Sept. 11 | Light rain shower | 31° /16° | 11.2 mm | 8 | |
| Sept. 12 | Partly cloudy | 31° /13° | 0 mm | 8 | |
| Sept. 13 | Sunny | 32° /12° | 0 mm | 8 | |
| Sept. 14 | Sunny | 31° /11° | 0 mm | 8 | |
| Sept. 15 | Overcast | 32° /16° | 0 mm | 8 | |
| Sept. 16 | Fog | 31° /15° | 0 mm | 8 | |
| Sept. 17 | Sunny | 29° /13° | 0 mm | 7 | |
| Sept. 18 | Sunny | 35° /14° | 0.1 mm | 8 | |
| Sept. 19 | Thundery outbreaks possible | 34° /17° | 12.8 mm | 7 | |
| Sept. 20 | Thundery outbreaks possible | 31° /14° | 0 mm | 8 | |
| Sept. 21 | Thundery outbreaks possible | 33° /16° | 14.1 mm | 7 | |
| Sept. 22 | Patchy light drizzle | 26° /13° | 37.4 mm | 6 | |
| Sept. 23 | Thundery outbreaks possible | 27° /12° | 0 mm | 7 | |
| Sept. 24 | Sunny | 27° /8° | 0 mm | 6 | |
| Sept. 25 | Sunny | 30° /10° | 0 mm | 8 | |
| Sept. 26 | Partly cloudy | 29° /12° | 0 mm | 8 | |
| Sept. 27 | Sunny | 28° /11° | 0 mm | 7 | |
| Sept. 28 | Partly cloudy | 33° /12° | 0 mm | 8 | |
| Sept. 29 | Thundery outbreaks possible | 33° /16° | 1.8 mm | 8 | |
| Sept. 30 | Sunny | 35° /15° | 0.5 mm | 9 | |
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Important Notice
Our weather forecast for Lancaster 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 Lancaster County forecast closer to your planned date for the most up-to-date weather information.
Lancaster County in September - FAQ
What are the expected maximum and minimum temperatures in Lancaster County during September?
Expect warm days with temperatures around 32°, cooling to mild conditions of 13° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Lancaster County during September?
In September, Lancaster County can expect light to moderate rainfall, totaling 49 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Lancaster County during September?
The average wind speed in Lancaster County during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Lancaster County
Explore the daily rainfall trends and prepare for Lancaster Countys September weather 💧
UV exposure in Lancaster County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Lancaster County?Get accurate weather forecasts for Lancaster County, located at latitude 40.8 and longitude -96.667. Stay updated with localized weather information tailored for Lancaster County.
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