Weather in Thurston County, Washington for September 2026
Until now, September 2026 in Thurston County is cooler than usual, with temperatures averaging 23 °F, this is 2.2 °F below the typical seasonal average.
Expect cooler weather in the next days in Thurston County with the forecast suggesting a temperature of 21.7 °F, lower than the historical average.
In general, the average temperature in Thurston County at the beginning of September is 25.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.6 °F by the end of September.
Thurston County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 44.7 mm.
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Thurston County Weather September
Temperatures trend during September in Thurston County
September weather in Thurston County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 24° /13° | 0 mm | 4 | |
| Sept. 2 | Overcast | 23° /12° | 15.8 mm | 4 | |
| Sept. 3 | Overcast | 24° /13° | 7.3 mm | 4 | |
| Sept. 4 | Overcast | 27° /12° | 0 mm | 6 | |
| Sept. 5 |  Sunny | 29° /13° | 0.3 mm | 6 | |
| Sept. 6 | Sunny | 27° /12° | 0 mm | 6 | |
| Sept. 7 |  Partly cloudy | 25° /14° | 1 mm | 6 | |
| Sept. 8 | Sunny | 25° /12° | 0 mm | 6 | |
| Sept. 9 | Overcast | 23° /12° | 1.9 mm | 4 | |
| Sept. 10 | Overcast | 22° /11° | 0.4 mm | 4 | |
| Sept. 11 | Overcast | 20° /9° | 0 mm | 4.1 | |
| Sept. 12 | Overcast | 17° /11° | 4.8 mm | 3.6 | |
| Sept. 13 |  Fog | 21° /11° | 0.3 mm | 3.6 | |
| Sept. 14 | Fog | 20° /9° | 0.1 mm | 4.8 | |
| Sept. 15 | Sunny | 22° /9° | 0 mm | 6 | |
| Sept. 16 | Sunny | 28° /9° | 0 mm | 7 | |
| Sept. 17 | Sunny | 30° /11° | 0 mm | 7 | |
| Sept. 18 | Sunny | 30° /12° | 0 mm | 7 | |
| Sept. 19 | Sunny | 21° /13° | 0 mm | 6 | |
| Sept. 20 | Overcast | 19° /11° | 0 mm | 5 | |
| Sept. 21 | Sunny | 20° /10° | 0 mm | 5 | |
| Sept. 22 | Overcast | 17° /7° | 0 mm | 5 | |
| Sept. 23 | Sunny | 19° /6° | 0 mm | 5 | |
| Sept. 24 | Sunny | 20° /6° | 0 mm | 6 | |
| Sept. 25 |  Moderate or heavy rain shower | 18° /11° | 4.8 mm | 4 | |
| Sept. 26 |  Heavy rain at times | 17° /8° | 2.9 mm | 4 | |
| Sept. 27 | Overcast | 22° /12° | 0 mm | 5 | |
| Sept. 28 | Overcast | 18° /11° | 0 mm | 4 | |
| Sept. 29 | Partly cloudy | 17° /11° | 11.2 mm | 5 | |
| Sept. 30 | Overcast | 18° /10° | 8.9 mm | 4 | |
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Thurston County in September - FAQ
What are the expected maximum and minimum temperatures in Thurston County during September?
How much rainfall should be expected in Thurston County during September?
What are the typical wind conditions in Thurston County during September?
September rainfall patterns in Thurston County
UV exposure in Thurston County during September
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Where is Thurston County?Get accurate weather forecasts for Thurston County, located at latitude 47.038 and longitude -122.901. Stay updated with localized weather information tailored for Thurston County.