Climate Insights for Johnson City

The climate in Johnson City is temperate. The average annual temperature is 13°C and approximately 1303mm of precipitation falls per year. Johnson City receives a notable amount of rainfall throughout the year, including during its driest month. Johnson City is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to -2°C. Snowfall occurs from January to December, with around 61cm accumulating over the season.

Temperatures in Johnson City vary considerably across the year, with a 30°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 28°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -2°C and the daily average is 2°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Johnson City is a fairly wet location, receiving approximately 1303mm of precipitation annually, which averages out to around 109mm per month. The wettest month is February, averaging 137mm of rainfall. May and January also tend to see above-average precipitation. The driest month is November, with just 75mm. That's 61mm less than February, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 61cm accumulating over the season. January typically sees the most snow at around 25cm.

Johnson City is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 10km/h in winter, 9km/h in spring, 6km/h in summer, 7km/h in autumn.

It is currently summer in Johnson City, which began on June 21, 2026. Johnson City is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 28°C, while the coldest stretch bottoms out in January near -2°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The table below shows monthly climate averages for Johnson City based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.