Last updated: June 24, 2025
In Johnson City, United States, the average temperature in January hovers around 3°C (37°F), with extremes that can plunge to a chilly -17°C (1°F) or soar to a warm 23°C (74°F). Expect 95 mm (3.7 in) of precipitation over 13 days, creating a humid atmosphere with an average humidity of 87%. This month is a blend of cool temperatures and moisture, perfect for cozy indoor activities!
In January in Johnson City, the average temperature is 3°C (37°F). Maximums can reach 23°C (74°F), while minimums can drop as low as -17°C (1°F). Be prepared for a wide range of temperatures and pack accordingly when visiting.
In Johnson City in January, the precipitation amount is 95 mm (3.7 in) over the course of 13 days.
In Johnson City in January, humidity is 87%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating proper layers to stay warm while navigating the wet conditions.
In Johnson City in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Johnson City for better planning.
UV Risk Categories
Weather in Johnson City varies notably across the year, with each month offering distinct climate conditions. This page compares January’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 |