Climate Insights for Chattanooga Sky Harbor

The climate in Chattanooga Sky Harbor is warm and mild. The average annual temperature is 18°C and approximately 776mm of precipitation falls per year. Chattanooga Sky Harbor receives a notable amount of rainfall throughout the year, including during its driest month. Chattanooga Sky Harbor 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, February, December, when temperatures can drop to 1°C. Light snow can occur between January and December.

Chattanooga Sky Harbor has a wide annual temperature range, spanning 36°C from the coldest to warmest months. July is the hottest month, with daytime highs reaching 37°C and an average of 30°C. January is the coolest month, with minimum temperatures around 1°C and an average of 6°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Chattanooga Sky Harbor is a relatively dry area, receiving approximately 776mm of precipitation annually, which averages out to around 65mm per month. The wettest month is May, averaging 145mm of rainfall. April and October also tend to see above-average precipitation. The driest month is July, with just 31mm. That's 114mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Light snowfall can occur between January and December, totalling around 9cm annually. February is the snowiest month with approximately 5cm.

Chattanooga Sky Harbor is moderately windy, with an average annual wind speed of 23km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 28km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in September, with average winds dropping to 20km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 8km/h 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 23km/h in winter, 26km/h in spring, 21km/h in summer, 22km/h in autumn.

It is currently spring in Chattanooga Sky Harbor, which began on March 20, 2026. Chattanooga Sky Harbor 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 37°C, while the coldest stretch bottoms out in January near 1°C. Summer is next, beginning on June 21, 2026 — 92 days from now.

The best time to visit Chattanooga Sky Harbor is during October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 83mm per month. By contrast, July can be uncomfortably hot with highs reaching 37°C, while January is the coldest period with lows dropping to 1°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Chattanooga Sky Harbor 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.