Washington County (Johnson City)
September
Weather in Washington County, Tennessee for September 2027
Your guide to Washington County weather in September - trends and predictions
Washington County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 106.9 mm.
Is September a good time to visit Washington County? check out the best time to travel to Washington County page.
✨ Is September a good time to visit Washington County? – Ask the AI Weatherman
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
25°/15°
Temperatures
10 km/h
Avg max wind
73 %
Avg humidity
Washington County Weather September
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Temperatures trend during September in Washington County
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September weather in Washington County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 29° /17° | 0 mm | 8 | |
| Sept. 2 | Overcast | 29° /17° | 0 mm | 8 | |
| Sept. 3 | Overcast | 29° /16° | 0 mm | 8 | |
| Sept. 4 |  Light rain | 31° /18° | 6.3 mm | 8 | |
| Sept. 5 |  Moderate or heavy rain shower | 31° /19° | 6 mm | 8 | |
| Sept. 6 | Light rain | 27° /18° | 6.4 mm | 7 | |
| Sept. 7 | Light rain | 24° /16° | 3.3 mm | 6 | |
| Sept. 8 |  Sunny | 26° /12° | 0 mm | 8 | |
| Sept. 9 | Sunny | 27° /14° | 0 mm | 8 | |
| Sept. 10 |  Partly cloudy | 25° /14° | 0 mm | 8 | |
| Sept. 11 |  Fog | 27° /14° | 0.1 mm | 7 | |
| Sept. 12 |  Heavy rain | 26° /16° | 36.2 mm | 4 | |
| Sept. 13 |  Patchy rain possible | 25° /14° | 1.1 mm | 5 | |
| Sept. 14 | Mist | 25° /16° | 0.1 mm | 6 | |
| Sept. 15 |  Cloudy | 26° /17° | 0 mm | 7 | |
| Sept. 16 | Mist | 23° /15° | 0.1 mm | 6 | |
| Sept. 17 | Cloudy | 26° /16° | 0.4 mm | 7 | |
| Sept. 18 | Patchy rain possible | 26° /18° | 2.4 mm | 6 | |
| Sept. 19 | Light rain | 28° /18° | 4.3 mm | 6 | |
| Sept. 20 |  Thundery outbreaks possible | 26° /16° | 1.5 mm | 6 | |
| Sept. 21 | Patchy rain possible | 28° /18° | 1.8 mm | 6 | |
| Sept. 22 | Thundery outbreaks possible | 25° /18° | 7.7 mm | 4 | |
| Sept. 23 | Overcast | 23° /15° | 0.3 mm | 4 | |
| Sept. 24 |  Moderate rain | 22° /16° | 11.8 mm | 4 | |
| Sept. 25 | Light rain | 22° /15° | 7.9 mm | 6 | |
| Sept. 26 | Light rain shower | 22° /13° | 1.7 mm | 6 | |
| Sept. 27 | Moderate rain | 20° /12° | 7.4 mm | 6 | |
| Sept. 28 | Fog | 22° /12° | 0 mm | 6 | |
| Sept. 29 | Fog | 24° /11° | 0 mm | 6 | |
| Sept. 30 | Mist | 25° /15° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Washington 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 Washington County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Washington County in September - FAQ
What are the expected maximum and minimum temperatures in Washington County during September?
During September, expect a variety of temperatures with highs around 25° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Washington County during September?
Significant rainfall exceeding 106.9 mm is expected in Washington 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 Washington County during September?
The average wind speed in Washington County during September is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Washington County
Explore the daily rainfall trends and prepare for Washington Countys September weather 💧
Typically, Washington County has 9 rainy days in September with a total of 106.9 mm of rainfall.
UV exposure in Washington County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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