Lancaster County (Lancaster)
September
Weather in Lancaster County, Pennsylvania for September 2027
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 26.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21 °C by the end of September.
The climate of Lancaster County in September is notably wet, with an average of 12 rainy days, and a total of 175.6 mm of precipitation.
Is September a good time to visit Lancaster County? check out the best time to travel to Lancaster County page.
✨ Is September a good time to visit Lancaster County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
18
Dry days
12
Rainy days
0
Snow days
24°/14°
Temperatures
16 km/h
Avg max wind
77 %
Avg humidity
Lancaster County Weather September
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Temperatures trend during September in Lancaster County
See the weather trend as well as the moving average line
September weather in Lancaster County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 29° /18° | 0.4 mm | 7 | |
| Sept. 2 |  Heavy rain | 24° /16° | 59.8 mm | 4 | |
| Sept. 3 |  Light rain | 26° /15° | 3.8 mm | 4 | |
| Sept. 4 | Light rain | 28° /15° | 9.7 mm | 6 | |
| Sept. 5 | Light rain | 27° /16° | 3.8 mm | 6 | |
| Sept. 6 | Patchy rain possible | 27° /15° | 1 mm | 7 | |
| Sept. 7 | Patchy rain possible | 23° /13° | 1.4 mm | 6 | |
| Sept. 8 |  Sunny | 24° /10° | 0 mm | 6 | |
| Sept. 9 |  Partly cloudy | 26° /12° | 0.1 mm | 5 | |
| Sept. 10 |  Overcast | 26° /14° | 0 mm | 5 | |
| Sept. 11 | Sunny | 27° /15° | 0.4 mm | 6 | |
| Sept. 12 | Sunny | 26° /13° | 0.9 mm | 5 | |
| Sept. 13 | Light rain | 26° /15° | 4.6 mm | 5 | |
| Sept. 14 | Partly cloudy | 26° /15° | 0 mm | 7 | |
| Sept. 15 | Patchy rain possible | 25° /13° | 1.6 mm | 6 | |
| Sept. 16 | Overcast | 26° /13° | 0 mm | 6 | |
| Sept. 17 | Light rain | 22° /16° | 7.2 mm | 5 | |
| Sept. 18 | Patchy rain possible | 24° /17° | 1.9 mm | 5 | |
| Sept. 19 | Patchy rain possible | 25° /14° | 0.3 mm | 5 | |
| Sept. 20 | Light rain | 22° /14° | 5.6 mm | 4 | |
| Sept. 21 | Light rain | 21° /15° | 4.5 mm | 4 | |
| Sept. 22 |  Moderate or heavy rain shower | 21° /14° | 5.6 mm | 4 | |
| Sept. 23 | Light rain | 21° /14° | 2.7 mm | 4 | |
| Sept. 24 |  Moderate rain | 20° /13° | 11.7 mm | 4 | |
| Sept. 25 | Moderate rain | 22° /14° | 15.4 mm | 4 | |
| Sept. 26 | Moderate rain at times | 22° /16° | 8.2 mm | 4 | |
| Sept. 27 |  Heavy rain at times | 20° /14° | 11.3 mm | 4 | |
| Sept. 28 | Moderate rain at times | 20° /15° | 6.8 mm | 4 | |
| Sept. 29 | Patchy rain possible | 21° /15° | 1 mm | 4 | |
| Sept. 30 | Light rain | 22° /15° | 5.7 mm | 3 | |
| Next | |||||
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.
Change Month
Lancaster County in September - FAQ
What are the expected maximum and minimum temperatures in Lancaster County 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 Lancaster County during September?
Significant rainfall exceeding 175.6 mm is expected in Lancaster 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 Lancaster County during September?
The average wind speed in Lancaster County during September is 16 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 💧
Typically, Lancaster County has 12 rainy days in September with a total of 175.6 mm of rainfall.
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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