Lycoming County (Williamsport)
September
Weather in Lycoming County for September 2025
Your guide to Lycoming County weather in September - trends and predictions
In general, the average temperature in Lycoming County at the beginning of September is 22.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °F by the end of September.
Lycoming County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 175 mm.
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Temperatures
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
22°/12°
Temperatures
10 km/h
Avg max wind
79 %
Avg humidity
Lycoming County in September average weather
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  28° | 2 21° | 3  22° | 4 23° | 5 23° | 6 24° | |
| 7  17° | 8 19° | 9  23° | 10 25° | 11 25° | 12 26° | 13 26° |
| 14 28° | 15 26° | 16 25° | 17  24° | 18 23° | 19 23° | 20 25° |
| 21  19° | 22  19° | 23 16° | 24  15° | 25 18° | 26  22° | 27 19° |
| 28 19° | 29 17° | 30 15° |
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Temperatures trend during September in Lycoming County
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September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Fog | 28° /18° | 0.2 mm | 6 | |
| Sept. 2 | Mist | 21° /8° | 0 mm | 5 | |
| Sept. 3 | Sunny | 22° /6° | 0 mm | 6 | |
| Sept. 4 | Sunny | 23° /8° | 0 mm | 6 | |
| Sept. 5 | Mist | 23° /8° | 0 mm | 5 | |
| Sept. 6 | Fog | 24° /9° | 0.4 mm | 5 | |
| Sept. 7 | Moderate rain | 17° /6° | 9.1 mm | 4 | |
| Sept. 8 | Fog | 19° /3° | 0 mm | 4 | |
| Sept. 9 | Partly cloudy | 23° /5° | 0 mm | 6 | |
| Sept. 10 | Partly cloudy | 25° /10° | 0 mm | 6 | |
| Sept. 11 | Mist | 25° /9° | 0 mm | 6 | |
| Sept. 12 | Mist | 26° /11° | 0 mm | 6 | |
| Sept. 13 | Mist | 26° /11° | 0 mm | 6 | |
| Sept. 14 | Mist | 28° /13° | 0 mm | 6 | |
| Sept. 15 | Mist | 26° /13° | 0 mm | 6 | |
| Sept. 16 | Mist | 25° /12° | 0 mm | 5 | |
| Sept. 17 | Cloudy | 24° /13° | 0 mm | 5 | |
| Sept. 18 | Fog | 23° /12° | 0 mm | 5 | |
| Sept. 19 | Mist | 23° /14° | 0 mm | 5 | |
| Sept. 20 | Fog | 25° /14° | 0 mm | 6 | |
| Sept. 21 | Light rain | 19° /16° | 84.4 mm | 4 | |
| Sept. 22 | Overcast | 19° /17° | 5.3 mm | 4 | |
| Sept. 23 | Overcast | 16° /13° | 3.6 mm | 4 | |
| Sept. 24 | Moderate or heavy rain shower | 15° /13° | 44.1 mm | 4 | |
| Sept. 25 | Fog | 18° /15° | 14.9 mm | 4 | |
| Sept. 26 | Light rain shower | 22° /16° | 8.9 mm | 5 | |
| Sept. 27 | Light rain shower | 19° /16° | 4.1 mm | 4 | |
| Sept. 28 | Fog | 19° /17° | 0 mm | 4 | |
| Sept. 29 | Fog | 17° /15° | 0 mm | 4 | |
| Sept. 30 | Mist | 15° /14° | 0 mm | 4 | |
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Important Notice
Our weather forecast for Lycoming 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 Lycoming County forecast closer to your planned date for the most up-to-date weather information.
Lycoming County in September - FAQ
What are the expected maximum and minimum temperatures in Lycoming County during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Lycoming County during September?
Significant rainfall exceeding 175 mm is expected in Lycoming County during September, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Lycoming County during September?
The average wind speed in Lycoming County during September is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Lycoming County
Explore the daily rainfall trends and prepare for Lycoming Countys September weather 💧
UV exposure in Lycoming County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Lycoming County?Get accurate weather forecasts for Lycoming County, located at latitude 41.241 and longitude -77.001. Stay updated with localized weather information tailored for Lycoming County.
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