Last updated: June 24, 2025
In Johnson City, United States, the average temperature in September is a pleasant 20°C (68°F). Expect a range of temperatures with a minimum of 5°C (42°F) and a maximum soaring to 31°C (88°F). This month typically brings 97 mm (3.8 in) of precipitation spread over 11 days, accompanied by an average humidity level of 68%. Enjoy the variability of the weather while exploring this beautiful location!
In September in Johnson City, the average temperature is 20°C (68°F). Maximum temperatures can reach 31°C (88°F), while minimums can drop as low as 5°C (42°F). This variation makes it a perfect time to explore Johnson City, so be sure to pack layers for your adventure!
In Johnson City in September, the total precipitation amount is 97 mm (3.8 in) over the course of 11 days.
In Johnson City in September humidity is 68%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls while also prompting travelers to stay hydrated and seek out refreshing breaks from the heat.
In Johnson City in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Johnson City.
UV Risk Categories
Weather in Johnson City varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Johnson City, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 3°C (37°F) | 95 mm (3.7 inches) | 87% | moderate |
February Weather | 6°C (43°F) | 145 mm (5.7 inches) | 87% | high |
March Weather | 8°C (47°F) | 129 mm (5.1 inches) | 86% | very high |
April Weather | 12°C (55°F) | 137 mm (5.4 inches) | 84% | very high |
May Weather | 17°C (64°F) | 122 mm (4.8 inches) | 83% | extreme |
June Weather | 20°C (69°F) | 118 mm (4.7 inches) | 83% | extreme |
July Weather | 23°C (73°F) | 102 mm (4.0 inches) | 79% | extreme |
August Weather | 22°C (71°F) | 118 mm (4.7 inches) | 66% | very high |
September Weather | 20°C (68°F) | 97 mm (3.8 inches) | 68% | very high |
October Weather | 15°C (59°F) | 122 mm (4.8 inches) | 78% | very high |
November Weather | 7°C (45°F) | 83 mm (3.3 inches) | 89% | moderate |
December Weather | 5°C (41°F) | 125 mm (4.9 inches) | 86% | moderate |