Climate averages 1991–2020
Chattanooga weather
in October.
A warm, moderately wet month: the 6th warmest and the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in Chattanooga: daytime highs average 22.0°C and nights cool to about 12.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 84 mm of rain on roughly 7 days, which makes October a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 20 min on an average October day.
The nearest other city in this atlas is East Chattanooga (6 km away). In October its highs average 21.8°C, about as warm as Chattanooga, with 84 mm of rain.
Among the 498 cities listed in the United States, Chattanooga ranks joint 241st of 498 for the warmest October highs and joint 293rd of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; Chattanooga is 0.6°C warmer than that mean.
From October to November, average highs fall by 6.5°C to 15.5°C, and monthly rainfall rises from 84 mm to 106 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- East Chattanooga in OctoberUnited States · 6 kmHigh 21.8°C · Low 11.8°C · 84 mm rain
- Huntsville in OctoberUnited States · 122 kmHigh 22.3°C · Low 12.5°C · 86 mm rain
- Murfreesboro in OctoberUnited States · 132 kmHigh 21.8°C · Low 12.0°C · 86 mm rain
- Roswell in OctoberUnited States · 143 kmHigh 21.8°C · Low 12.3°C · 86 mm rain
- Sandy Springs in OctoberUnited States · 151 kmHigh 21.9°C · Low 12.4°C · 83 mm rain
- Johns Creek in OctoberUnited States · 152 kmHigh 22.1°C · Low 12.6°C · 86 mm rain
- Knoxville in OctoberUnited States · 162 kmHigh 20.9°C · Low 10.5°C · 74 mm rain
- Atlanta in OctoberUnited States · 167 kmHigh 22.1°C · Low 12.2°C · 77 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.