Pierce County
September
Weather in Pierce County for September 2025
Your guide to Pierce County weather in September - trends and predictions
In general, the average temperature in Pierce County at the beginning of September is 26.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.7 °F by the end of September.
Pierce County sees moderate rainfall in September, averaging 8 rainy days.
- New! Chat with our AI weatherman - it’s amazing and free.
22
Dry days
8
Rainy days
0
Snow days
22°/10°
Temperatures
12 km/h
Avg max wind
69 %
Avg humidity
Pierce County in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  28° | 2  28° | 3  22° | 4  23° | 5 28° | 6  28° | 7 28° |
| 8 27° | 9 26° | 10 25° | 11 19° | 12 20° | 13 21° | 14 24° |
| 15  24° | 16 25° | 17 20° | 18 18° | 19 18° | 20  19° | 21 21° |
| 22 23° | 23 21° | 24 22° | 25  19° | 26 17° | 27 18° | 28 15° |
| 29 16° | 30 17° |
You can click on date
Access Pierce County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Pierce County
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 | Fog | 28° /13° | 0 mm | 7 | |
| Sept. 2 | Cloudy | 28° /12° | 0 mm | 6 | |
| Sept. 3 | Light drizzle | 22° /13° | 0.9 mm | 5 | |
| Sept. 4 | Overcast | 23° /11° | 0 mm | 5 | |
| Sept. 5 | Mist | 28° /11° | 0 mm | 7 | |
| Sept. 6 | Partly cloudy | 28° /12° | 0 mm | 7 | |
| Sept. 7 | Cloudy | 28° /13° | 0 mm | 7 | |
| Sept. 8 | Partly cloudy | 27° /11° | 0 mm | 7 | |
| Sept. 9 | Mist | 26° /10° | 0 mm | 6 | |
| Sept. 10 | Cloudy | 25° /10° | 0 mm | 6 | |
| Sept. 11 | Overcast | 19° /12° | 1.1 mm | 4 | |
| Sept. 12 | Overcast | 20° /10° | 0.3 mm | 5 | |
| Sept. 13 | Mist | 21° /11° | 0 mm | 5 | |
| Sept. 14 | Mist | 24° /10° | 1.1 mm | 6 | |
| Sept. 15 | Sunny | 24° /10° | 0 mm | 6 | |
| Sept. 16 | Partly cloudy | 25° /9° | 0 mm | 6 | |
| Sept. 17 | Overcast | 20° /10° | 0 mm | 5 | |
| Sept. 18 | Overcast | 18° /12° | 0 mm | 5 | |
| Sept. 19 | Cloudy | 18° /11° | 0 mm | 4 | |
| Sept. 20 | Light rain shower | 19° /10° | 0.9 mm | 4 | |
| Sept. 21 | Sunny | 21° /8° | 0 mm | 6 | |
| Sept. 22 | Sunny | 23° /10° | 0 mm | 6 | |
| Sept. 23 | Light rain | 21° /12° | 3.7 mm | 5 | |
| Sept. 24 | Light rain | 22° /11° | 4.2 mm | 5 | |
| Sept. 25 | Moderate or heavy rain with thunder | 19° /13° | 9.3 mm | 4 | |
| Sept. 26 | Light rain shower | 17° /11° | 19.5 mm | 4 | |
| Sept. 27 | Light rain shower | 18° /11° | 7.7 mm | 4 | |
| Sept. 28 | Light rain shower | 15° /8° | 1 mm | 4 | |
| Sept. 29 | Overcast | 16° /7° | 0 mm | 4 | |
| Sept. 30 | Mist | 17° /7° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Pierce 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 Pierce County forecast closer to your planned date for the most up-to-date weather information.
Pierce County in September - FAQ
What are the expected maximum and minimum temperatures in Pierce County during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Pierce County during September?
Moderate rainfall is anticipated in Pierce County during September, with a total of 54.1 mm spread over approximately 8 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Pierce County during September?
The average wind speed in Pierce County during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Pierce County
Explore the daily rainfall trends and prepare for Pierce Countys September weather 💧
UV exposure in Pierce County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Pierce County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Pierce County?Get accurate weather forecasts for Pierce County, located at latitude 47.253 and longitude -122.444. Stay updated with localized weather information tailored for Pierce County.
Found a mistake?
We appreciate your attention to details. Tell us here.