Pierce County (Tacoma)
September
Weather in Pierce County, Washington for September 2026
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 26.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.7 °F by the end of September.
Pierce County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 49.8 mm.
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Temperatures
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
22°/11°
Temperatures
11 km/h
Avg max wind
70 %
Avg humidity
Pierce County Weather September
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Temperatures trend during September in Pierce County
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September weather in Pierce County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Fog | 26° /13° | 0 mm | 6 | |
| Sept. 2 |  Cloudy | 27° /13° | 0 mm | 6 | |
| Sept. 3 |  Light drizzle | 24° /14° | 0.6 mm | 5 | |
| Sept. 4 |  Overcast | 26° /13° | 0 mm | 6 | |
| Sept. 5 | Mist | 29° /14° | 0 mm | 7 | |
| Sept. 6 |  Partly cloudy | 27° /13° | 0 mm | 6 | |
| Sept. 7 | Cloudy | 25° /13° | 0 mm | 6 | |
| Sept. 8 | Partly cloudy | 25° /12° | 0 mm | 6 | |
| Sept. 9 | Overcast | 23° /12° | 0 mm | 5 | |
| Sept. 10 | Cloudy | 24° /12° | 0 mm | 6 | |
| Sept. 11 | Overcast | 18° /12° | 0.8 mm | 4 | |
| Sept. 12 | Overcast | 20° /11° | 0.2 mm | 4 | |
| Sept. 13 | Mist | 20° /11° | 0 mm | 5 | |
| Sept. 14 | Mist | 22° /11° | 0.7 mm | 5 | |
| Sept. 15 |  Sunny | 23° /10° | 0 mm | 6 | |
| Sept. 16 | Partly cloudy | 27° /10° | 0 mm | 7 | |
| Sept. 17 | Overcast | 21° /12° | 0 mm | 5 | |
| Sept. 18 | Overcast | 18° /12° | 0 mm | 4 | |
| Sept. 19 | Cloudy | 20° /11° | 0 mm | 5 | |
| Sept. 20 |  Light rain shower | 19° /11° | 0.6 mm | 5 | |
| Sept. 21 | Sunny | 20° /10° | 1.5 mm | 5 | |
| Sept. 22 | Sunny | 23° /10° | 0 mm | 6 | |
| Sept. 23 | Light rain | 22° /12° | 2.5 mm | 5 | |
| Sept. 24 | Light rain | 23° /11° | 2.8 mm | 5 | |
| Sept. 25 |  Moderate or heavy rain with thunder | 19° /12° | 6.2 mm | 4 | |
| Sept. 26 | Light rain shower | 18° /10° | 13 mm | 4 | |
| Sept. 27 | Light rain shower | 20° /12° | 5.1 mm | 5 | |
| Sept. 28 | Overcast | 17° /10° | 0.7 mm | 4 | |
| Sept. 29 | Overcast | 16° /9° | 3.6 mm | 4 | |
| Sept. 30 | Mist | 18° /9° | 2.5 mm | 4 | |
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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.
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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 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Pierce County during September?
In September, Pierce County can expect light to moderate rainfall, totaling 49.8 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Pierce County during September?
The average wind speed in Pierce County during September is 11 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 ☀️
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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.
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