Climate averages 1991–2020
Chattanooga weather
in July.
A hot, wet month: the warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Chattanooga: daytime highs average 30.9°C and nights cool to about 21.6°C. By daytime temperature it is the warmest month of the year.
Expect about 105 mm of rain on roughly 13 days, which makes July a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 16 min on an average July day.
The nearest other city in this atlas is East Chattanooga (6 km away). In July its highs average 30.7°C, about as warm as Chattanooga, with 105 mm of rain.
Among the 498 cities listed in the United States, Chattanooga ranks joint 203rd of 498 for the warmest July highs and joint 407th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Chattanooga is 0.6°C warmer than that mean.
From July to August, average highs fall by 0.4°C to 30.5°C, and monthly rainfall falls from 105 mm to 85 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Chattanooga climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.6°C0.6°C | 0.6°C | 119 | 10.2 | 10.110 h |
| February | 11.9°C2.1°C | 2.1°C | 113 | 10.2 | 10.911 h |
| March | 16.3°C5.6°C | 5.6°C | 133 | 11.6 | 11.912 h |
| April | 21.2°C10.0°C | 10.0°C | 120 | 10.3 | 13.013 h |
| May | 25.4°C14.9°C | 14.9°C | 101 | 10.6 | 14.014 h |
| June | 29.3°C19.5°C | 19.5°C | 95 | 12.9 | 14.514 h |
| July, selected | 30.9°C21.6°C | 21.6°C | 105 | 13.2 | 14.314 h |
| August | 30.5°C21.2°C | 21.2°C | 85 | 11.3 | 13.513 h |
| September | 27.5°C18.1°C | 18.1°C | 99 | 8.0 | 12.412 h |
| October | 22.0°C12.0°C | 12.0°C | 84 | 7.1 | 11.311 h |
| November | 15.5°C5.9°C | 5.9°C | 106 | 8.7 | 10.410 h |
| December | 10.8°C2.3°C | 2.3°C | 128 | 10.3 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- East Chattanooga in JulyUnited States · 6 kmHigh 30.7°C · Low 21.4°C · 105 mm rain
- Huntsville in JulyUnited States · 122 kmHigh 31.0°C · Low 22.0°C · 112 mm rain
- Murfreesboro in JulyUnited States · 132 kmHigh 31.1°C · Low 21.8°C · 112 mm rain
- Roswell in JulyUnited States · 143 kmHigh 30.5°C · Low 21.5°C · 104 mm rain
- Sandy Springs in JulyUnited States · 151 kmHigh 30.6°C · Low 21.5°C · 108 mm rain
- Johns Creek in JulyUnited States · 152 kmHigh 30.8°C · Low 21.8°C · 104 mm rain
- Knoxville in JulyUnited States · 162 kmHigh 29.8°C · Low 20.5°C · 119 mm rain
- Atlanta in JulyUnited States · 167 kmHigh 30.7°C · Low 21.4°C · 106 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Chattanooga) is explained once on the Chattanooga year overview and on the Sources, method and limits page.
East Chattanooga lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.